5272 lines
191 KiB
C++
5272 lines
191 KiB
C++
/*
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* Copyright (C) 2008 The Android Open Source Project
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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#include "debugger.h"
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#include <sys/uio.h>
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#include <memory>
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#include <set>
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#include <vector>
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#include "android-base/stringprintf.h"
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#include "arch/context.h"
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#include "art_field-inl.h"
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#include "art_method-inl.h"
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#include "base/enums.h"
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#include "base/strlcpy.h"
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#include "base/time_utils.h"
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#include "class_linker-inl.h"
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#include "class_linker.h"
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#include "dex_file-inl.h"
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#include "dex_file_annotations.h"
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#include "dex_instruction.h"
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#include "entrypoints/runtime_asm_entrypoints.h"
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#include "gc/accounting/card_table-inl.h"
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#include "gc/allocation_record.h"
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#include "gc/scoped_gc_critical_section.h"
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#include "gc/space/bump_pointer_space-walk-inl.h"
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#include "gc/space/large_object_space.h"
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#include "gc/space/space-inl.h"
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#include "handle_scope-inl.h"
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#include "jdwp/jdwp_priv.h"
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#include "jdwp/object_registry.h"
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#include "jni_internal.h"
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#include "jvalue-inl.h"
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#include "mirror/class-inl.h"
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#include "mirror/class.h"
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#include "mirror/class_loader.h"
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#include "mirror/object-inl.h"
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#include "mirror/object_array-inl.h"
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#include "mirror/string-inl.h"
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#include "mirror/throwable.h"
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#include "nativehelper/ScopedLocalRef.h"
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#include "nativehelper/ScopedPrimitiveArray.h"
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#include "obj_ptr-inl.h"
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#include "reflection.h"
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#include "safe_map.h"
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#include "scoped_thread_state_change-inl.h"
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#include "stack.h"
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#include "thread_list.h"
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#include "utf.h"
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#include "well_known_classes.h"
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namespace art {
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using android::base::StringPrintf;
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// The key identifying the debugger to update instrumentation.
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static constexpr const char* kDbgInstrumentationKey = "Debugger";
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// Limit alloc_record_count to the 2BE value (64k-1) that is the limit of the current protocol.
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static uint16_t CappedAllocRecordCount(size_t alloc_record_count) {
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const size_t cap = 0xffff;
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if (alloc_record_count > cap) {
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return cap;
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}
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return alloc_record_count;
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}
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class Breakpoint : public ValueObject {
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public:
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Breakpoint(ArtMethod* method, uint32_t dex_pc, DeoptimizationRequest::Kind deoptimization_kind)
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: method_(method->GetCanonicalMethod(kRuntimePointerSize)),
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dex_pc_(dex_pc),
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deoptimization_kind_(deoptimization_kind) {
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CHECK(deoptimization_kind_ == DeoptimizationRequest::kNothing ||
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deoptimization_kind_ == DeoptimizationRequest::kSelectiveDeoptimization ||
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deoptimization_kind_ == DeoptimizationRequest::kFullDeoptimization);
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}
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Breakpoint(const Breakpoint& other) REQUIRES_SHARED(Locks::mutator_lock_)
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: method_(other.method_),
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dex_pc_(other.dex_pc_),
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deoptimization_kind_(other.deoptimization_kind_) {}
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// Method() is called from root visiting, do not use ScopedObjectAccess here or it can cause
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// GC to deadlock if another thread tries to call SuspendAll while the GC is in a runnable state.
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ArtMethod* Method() const {
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return method_;
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}
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uint32_t DexPc() const {
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return dex_pc_;
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}
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DeoptimizationRequest::Kind GetDeoptimizationKind() const {
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return deoptimization_kind_;
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}
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// Returns true if the method of this breakpoint and the passed in method should be considered the
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// same. That is, they are either the same method or they are copied from the same method.
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bool IsInMethod(ArtMethod* m) const REQUIRES_SHARED(Locks::mutator_lock_) {
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return method_ == m->GetCanonicalMethod(kRuntimePointerSize);
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}
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private:
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// The location of this breakpoint.
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ArtMethod* method_;
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uint32_t dex_pc_;
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// Indicates whether breakpoint needs full deoptimization or selective deoptimization.
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DeoptimizationRequest::Kind deoptimization_kind_;
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};
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static std::ostream& operator<<(std::ostream& os, const Breakpoint& rhs)
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REQUIRES_SHARED(Locks::mutator_lock_) {
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os << StringPrintf("Breakpoint[%s @%#x]", ArtMethod::PrettyMethod(rhs.Method()).c_str(),
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rhs.DexPc());
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return os;
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}
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class DebugInstrumentationListener FINAL : public instrumentation::InstrumentationListener {
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public:
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DebugInstrumentationListener() {}
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virtual ~DebugInstrumentationListener() {}
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void MethodEntered(Thread* thread,
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Handle<mirror::Object> this_object,
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ArtMethod* method,
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uint32_t dex_pc)
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OVERRIDE REQUIRES_SHARED(Locks::mutator_lock_) {
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if (method->IsNative()) {
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// TODO: post location events is a suspension point and native method entry stubs aren't.
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return;
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}
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if (IsListeningToDexPcMoved()) {
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// We also listen to kDexPcMoved instrumentation event so we know the DexPcMoved method is
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// going to be called right after us. To avoid sending JDWP events twice for this location,
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// we report the event in DexPcMoved. However, we must remind this is method entry so we
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// send the METHOD_ENTRY event. And we can also group it with other events for this location
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// like BREAKPOINT or SINGLE_STEP (or even METHOD_EXIT if this is a RETURN instruction).
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thread->SetDebugMethodEntry();
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} else if (IsListeningToMethodExit() && IsReturn(method, dex_pc)) {
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// We also listen to kMethodExited instrumentation event and the current instruction is a
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// RETURN so we know the MethodExited method is going to be called right after us. To avoid
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// sending JDWP events twice for this location, we report the event(s) in MethodExited.
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// However, we must remind this is method entry so we send the METHOD_ENTRY event. And we can
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// also group it with other events for this location like BREAKPOINT or SINGLE_STEP.
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thread->SetDebugMethodEntry();
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} else {
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Dbg::UpdateDebugger(thread, this_object.Get(), method, 0, Dbg::kMethodEntry, nullptr);
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}
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}
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void MethodExited(Thread* thread,
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Handle<mirror::Object> this_object,
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ArtMethod* method,
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uint32_t dex_pc,
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const JValue& return_value)
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OVERRIDE REQUIRES_SHARED(Locks::mutator_lock_) {
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if (method->IsNative()) {
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// TODO: post location events is a suspension point and native method entry stubs aren't.
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return;
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}
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uint32_t events = Dbg::kMethodExit;
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if (thread->IsDebugMethodEntry()) {
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// It is also the method entry.
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DCHECK(IsReturn(method, dex_pc));
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events |= Dbg::kMethodEntry;
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thread->ClearDebugMethodEntry();
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}
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Dbg::UpdateDebugger(thread, this_object.Get(), method, dex_pc, events, &return_value);
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}
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void MethodUnwind(Thread* thread ATTRIBUTE_UNUSED,
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Handle<mirror::Object> this_object ATTRIBUTE_UNUSED,
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ArtMethod* method,
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uint32_t dex_pc)
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OVERRIDE REQUIRES_SHARED(Locks::mutator_lock_) {
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// We're not recorded to listen to this kind of event, so complain.
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LOG(ERROR) << "Unexpected method unwind event in debugger " << ArtMethod::PrettyMethod(method)
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<< " " << dex_pc;
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}
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void DexPcMoved(Thread* thread,
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Handle<mirror::Object> this_object,
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ArtMethod* method,
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uint32_t new_dex_pc)
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OVERRIDE REQUIRES_SHARED(Locks::mutator_lock_) {
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if (IsListeningToMethodExit() && IsReturn(method, new_dex_pc)) {
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// We also listen to kMethodExited instrumentation event and the current instruction is a
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// RETURN so we know the MethodExited method is going to be called right after us. Like in
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// MethodEntered, we delegate event reporting to MethodExited.
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// Besides, if this RETURN instruction is the only one in the method, we can send multiple
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// JDWP events in the same packet: METHOD_ENTRY, METHOD_EXIT, BREAKPOINT and/or SINGLE_STEP.
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// Therefore, we must not clear the debug method entry flag here.
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} else {
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uint32_t events = 0;
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if (thread->IsDebugMethodEntry()) {
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// It is also the method entry.
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events = Dbg::kMethodEntry;
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thread->ClearDebugMethodEntry();
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}
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Dbg::UpdateDebugger(thread, this_object.Get(), method, new_dex_pc, events, nullptr);
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}
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}
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void FieldRead(Thread* thread ATTRIBUTE_UNUSED,
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Handle<mirror::Object> this_object,
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ArtMethod* method,
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uint32_t dex_pc,
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ArtField* field)
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OVERRIDE REQUIRES_SHARED(Locks::mutator_lock_) {
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Dbg::PostFieldAccessEvent(method, dex_pc, this_object.Get(), field);
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}
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void FieldWritten(Thread* thread ATTRIBUTE_UNUSED,
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Handle<mirror::Object> this_object,
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ArtMethod* method,
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uint32_t dex_pc,
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ArtField* field,
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const JValue& field_value)
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OVERRIDE REQUIRES_SHARED(Locks::mutator_lock_) {
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Dbg::PostFieldModificationEvent(method, dex_pc, this_object.Get(), field, &field_value);
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}
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void ExceptionCaught(Thread* thread ATTRIBUTE_UNUSED,
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Handle<mirror::Throwable> exception_object)
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OVERRIDE REQUIRES_SHARED(Locks::mutator_lock_) {
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Dbg::PostException(exception_object.Get());
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}
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// We only care about branches in the Jit.
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void Branch(Thread* /*thread*/, ArtMethod* method, uint32_t dex_pc, int32_t dex_pc_offset)
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OVERRIDE REQUIRES_SHARED(Locks::mutator_lock_) {
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LOG(ERROR) << "Unexpected branch event in debugger " << ArtMethod::PrettyMethod(method)
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<< " " << dex_pc << ", " << dex_pc_offset;
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}
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// We only care about invokes in the Jit.
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void InvokeVirtualOrInterface(Thread* thread ATTRIBUTE_UNUSED,
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Handle<mirror::Object> this_object ATTRIBUTE_UNUSED,
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ArtMethod* method,
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uint32_t dex_pc,
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ArtMethod* target ATTRIBUTE_UNUSED)
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OVERRIDE REQUIRES_SHARED(Locks::mutator_lock_) {
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LOG(ERROR) << "Unexpected invoke event in debugger " << ArtMethod::PrettyMethod(method)
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<< " " << dex_pc;
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}
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private:
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static bool IsReturn(ArtMethod* method, uint32_t dex_pc)
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REQUIRES_SHARED(Locks::mutator_lock_) {
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const DexFile::CodeItem* code_item = method->GetCodeItem();
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const Instruction* instruction = Instruction::At(&code_item->insns_[dex_pc]);
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return instruction->IsReturn();
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}
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static bool IsListeningToDexPcMoved() REQUIRES_SHARED(Locks::mutator_lock_) {
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return IsListeningTo(instrumentation::Instrumentation::kDexPcMoved);
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}
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static bool IsListeningToMethodExit() REQUIRES_SHARED(Locks::mutator_lock_) {
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return IsListeningTo(instrumentation::Instrumentation::kMethodExited);
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}
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static bool IsListeningTo(instrumentation::Instrumentation::InstrumentationEvent event)
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REQUIRES_SHARED(Locks::mutator_lock_) {
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return (Dbg::GetInstrumentationEvents() & event) != 0;
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}
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DISALLOW_COPY_AND_ASSIGN(DebugInstrumentationListener);
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} gDebugInstrumentationListener;
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// JDWP is allowed unless the Zygote forbids it.
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static bool gJdwpAllowed = true;
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// Was there a -Xrunjdwp or -agentlib:jdwp= argument on the command line?
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static bool gJdwpConfigured = false;
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// JDWP options for debugging. Only valid if IsJdwpConfigured() is true.
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static JDWP::JdwpOptions gJdwpOptions;
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// Runtime JDWP state.
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static JDWP::JdwpState* gJdwpState = nullptr;
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static bool gDebuggerConnected; // debugger or DDMS is connected.
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static bool gDdmThreadNotification = false;
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// DDMS GC-related settings.
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static Dbg::HpifWhen gDdmHpifWhen = Dbg::HPIF_WHEN_NEVER;
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static Dbg::HpsgWhen gDdmHpsgWhen = Dbg::HPSG_WHEN_NEVER;
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static Dbg::HpsgWhat gDdmHpsgWhat;
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static Dbg::HpsgWhen gDdmNhsgWhen = Dbg::HPSG_WHEN_NEVER;
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static Dbg::HpsgWhat gDdmNhsgWhat;
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bool Dbg::gDebuggerActive = false;
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bool Dbg::gDisposed = false;
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ObjectRegistry* Dbg::gRegistry = nullptr;
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// Deoptimization support.
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std::vector<DeoptimizationRequest> Dbg::deoptimization_requests_;
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size_t Dbg::full_deoptimization_event_count_ = 0;
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// Instrumentation event reference counters.
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size_t Dbg::dex_pc_change_event_ref_count_ = 0;
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size_t Dbg::method_enter_event_ref_count_ = 0;
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size_t Dbg::method_exit_event_ref_count_ = 0;
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size_t Dbg::field_read_event_ref_count_ = 0;
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size_t Dbg::field_write_event_ref_count_ = 0;
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size_t Dbg::exception_catch_event_ref_count_ = 0;
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uint32_t Dbg::instrumentation_events_ = 0;
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Dbg::DbgThreadLifecycleCallback Dbg::thread_lifecycle_callback_;
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Dbg::DbgClassLoadCallback Dbg::class_load_callback_;
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// Breakpoints.
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static std::vector<Breakpoint> gBreakpoints GUARDED_BY(Locks::breakpoint_lock_);
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void DebugInvokeReq::VisitRoots(RootVisitor* visitor, const RootInfo& root_info) {
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receiver.VisitRootIfNonNull(visitor, root_info); // null for static method call.
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klass.VisitRoot(visitor, root_info);
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}
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void SingleStepControl::AddDexPc(uint32_t dex_pc) {
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dex_pcs_.insert(dex_pc);
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}
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bool SingleStepControl::ContainsDexPc(uint32_t dex_pc) const {
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return dex_pcs_.find(dex_pc) == dex_pcs_.end();
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}
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static bool IsBreakpoint(ArtMethod* m, uint32_t dex_pc)
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REQUIRES(!Locks::breakpoint_lock_)
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REQUIRES_SHARED(Locks::mutator_lock_) {
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ReaderMutexLock mu(Thread::Current(), *Locks::breakpoint_lock_);
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for (size_t i = 0, e = gBreakpoints.size(); i < e; ++i) {
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if (gBreakpoints[i].DexPc() == dex_pc && gBreakpoints[i].IsInMethod(m)) {
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VLOG(jdwp) << "Hit breakpoint #" << i << ": " << gBreakpoints[i];
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return true;
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}
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}
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return false;
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}
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static bool IsSuspendedForDebugger(ScopedObjectAccessUnchecked& soa, Thread* thread)
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REQUIRES(!Locks::thread_suspend_count_lock_) {
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MutexLock mu(soa.Self(), *Locks::thread_suspend_count_lock_);
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// A thread may be suspended for GC; in this code, we really want to know whether
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// there's a debugger suspension active.
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return thread->IsSuspended() && thread->GetDebugSuspendCount() > 0;
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}
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static mirror::Array* DecodeNonNullArray(JDWP::RefTypeId id, JDWP::JdwpError* error)
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REQUIRES_SHARED(Locks::mutator_lock_) {
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mirror::Object* o = Dbg::GetObjectRegistry()->Get<mirror::Object*>(id, error);
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if (o == nullptr) {
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*error = JDWP::ERR_INVALID_OBJECT;
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return nullptr;
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}
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if (!o->IsArrayInstance()) {
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*error = JDWP::ERR_INVALID_ARRAY;
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return nullptr;
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}
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*error = JDWP::ERR_NONE;
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return o->AsArray();
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}
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static mirror::Class* DecodeClass(JDWP::RefTypeId id, JDWP::JdwpError* error)
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REQUIRES_SHARED(Locks::mutator_lock_) {
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mirror::Object* o = Dbg::GetObjectRegistry()->Get<mirror::Object*>(id, error);
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if (o == nullptr) {
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*error = JDWP::ERR_INVALID_OBJECT;
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return nullptr;
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}
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if (!o->IsClass()) {
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*error = JDWP::ERR_INVALID_CLASS;
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return nullptr;
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}
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*error = JDWP::ERR_NONE;
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return o->AsClass();
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}
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static Thread* DecodeThread(ScopedObjectAccessUnchecked& soa, JDWP::ObjectId thread_id,
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JDWP::JdwpError* error)
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REQUIRES_SHARED(Locks::mutator_lock_)
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REQUIRES(!Locks::thread_list_lock_, !Locks::thread_suspend_count_lock_) {
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mirror::Object* thread_peer = Dbg::GetObjectRegistry()->Get<mirror::Object*>(thread_id, error);
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if (thread_peer == nullptr) {
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// This isn't even an object.
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*error = JDWP::ERR_INVALID_OBJECT;
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return nullptr;
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}
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ObjPtr<mirror::Class> java_lang_Thread =
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soa.Decode<mirror::Class>(WellKnownClasses::java_lang_Thread);
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if (!java_lang_Thread->IsAssignableFrom(thread_peer->GetClass())) {
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// This isn't a thread.
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*error = JDWP::ERR_INVALID_THREAD;
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return nullptr;
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}
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MutexLock mu(soa.Self(), *Locks::thread_list_lock_);
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Thread* thread = Thread::FromManagedThread(soa, thread_peer);
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// If thread is null then this a java.lang.Thread without a Thread*. Must be a un-started or a
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// zombie.
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*error = (thread == nullptr) ? JDWP::ERR_THREAD_NOT_ALIVE : JDWP::ERR_NONE;
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return thread;
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}
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static JDWP::JdwpTag BasicTagFromDescriptor(const char* descriptor) {
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// JDWP deliberately uses the descriptor characters' ASCII values for its enum.
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// Note that by "basic" we mean that we don't get more specific than JT_OBJECT.
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return static_cast<JDWP::JdwpTag>(descriptor[0]);
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}
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static JDWP::JdwpTag BasicTagFromClass(mirror::Class* klass)
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REQUIRES_SHARED(Locks::mutator_lock_) {
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std::string temp;
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const char* descriptor = klass->GetDescriptor(&temp);
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return BasicTagFromDescriptor(descriptor);
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}
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static JDWP::JdwpTag TagFromClass(const ScopedObjectAccessUnchecked& soa, mirror::Class* c)
|
|
REQUIRES_SHARED(Locks::mutator_lock_) {
|
|
CHECK(c != nullptr);
|
|
if (c->IsArrayClass()) {
|
|
return JDWP::JT_ARRAY;
|
|
}
|
|
if (c->IsStringClass()) {
|
|
return JDWP::JT_STRING;
|
|
}
|
|
if (c->IsClassClass()) {
|
|
return JDWP::JT_CLASS_OBJECT;
|
|
}
|
|
{
|
|
ObjPtr<mirror::Class> thread_class =
|
|
soa.Decode<mirror::Class>(WellKnownClasses::java_lang_Thread);
|
|
if (thread_class->IsAssignableFrom(c)) {
|
|
return JDWP::JT_THREAD;
|
|
}
|
|
}
|
|
{
|
|
ObjPtr<mirror::Class> thread_group_class =
|
|
soa.Decode<mirror::Class>(WellKnownClasses::java_lang_ThreadGroup);
|
|
if (thread_group_class->IsAssignableFrom(c)) {
|
|
return JDWP::JT_THREAD_GROUP;
|
|
}
|
|
}
|
|
{
|
|
ObjPtr<mirror::Class> class_loader_class =
|
|
soa.Decode<mirror::Class>(WellKnownClasses::java_lang_ClassLoader);
|
|
if (class_loader_class->IsAssignableFrom(c)) {
|
|
return JDWP::JT_CLASS_LOADER;
|
|
}
|
|
}
|
|
return JDWP::JT_OBJECT;
|
|
}
|
|
|
|
/*
|
|
* Objects declared to hold Object might actually hold a more specific
|
|
* type. The debugger may take a special interest in these (e.g. it
|
|
* wants to display the contents of Strings), so we want to return an
|
|
* appropriate tag.
|
|
*
|
|
* Null objects are tagged JT_OBJECT.
|
|
*/
|
|
JDWP::JdwpTag Dbg::TagFromObject(const ScopedObjectAccessUnchecked& soa, mirror::Object* o) {
|
|
return (o == nullptr) ? JDWP::JT_OBJECT : TagFromClass(soa, o->GetClass());
|
|
}
|
|
|
|
static bool IsPrimitiveTag(JDWP::JdwpTag tag) {
|
|
switch (tag) {
|
|
case JDWP::JT_BOOLEAN:
|
|
case JDWP::JT_BYTE:
|
|
case JDWP::JT_CHAR:
|
|
case JDWP::JT_FLOAT:
|
|
case JDWP::JT_DOUBLE:
|
|
case JDWP::JT_INT:
|
|
case JDWP::JT_LONG:
|
|
case JDWP::JT_SHORT:
|
|
case JDWP::JT_VOID:
|
|
return true;
|
|
default:
|
|
return false;
|
|
}
|
|
}
|
|
|
|
void Dbg::StartJdwp() {
|
|
if (!gJdwpAllowed || !IsJdwpConfigured()) {
|
|
// No JDWP for you!
|
|
return;
|
|
}
|
|
|
|
CHECK(gRegistry == nullptr);
|
|
gRegistry = new ObjectRegistry;
|
|
|
|
// Init JDWP if the debugger is enabled. This may connect out to a
|
|
// debugger, passively listen for a debugger, or block waiting for a
|
|
// debugger.
|
|
gJdwpState = JDWP::JdwpState::Create(&gJdwpOptions);
|
|
if (gJdwpState == nullptr) {
|
|
// We probably failed because some other process has the port already, which means that
|
|
// if we don't abort the user is likely to think they're talking to us when they're actually
|
|
// talking to that other process.
|
|
LOG(FATAL) << "Debugger thread failed to initialize";
|
|
}
|
|
|
|
// If a debugger has already attached, send the "welcome" message.
|
|
// This may cause us to suspend all threads.
|
|
if (gJdwpState->IsActive()) {
|
|
ScopedObjectAccess soa(Thread::Current());
|
|
gJdwpState->PostVMStart();
|
|
}
|
|
}
|
|
|
|
void Dbg::StopJdwp() {
|
|
// Post VM_DEATH event before the JDWP connection is closed (either by the JDWP thread or the
|
|
// destruction of gJdwpState).
|
|
if (gJdwpState != nullptr && gJdwpState->IsActive()) {
|
|
gJdwpState->PostVMDeath();
|
|
}
|
|
// Prevent the JDWP thread from processing JDWP incoming packets after we close the connection.
|
|
Dispose();
|
|
delete gJdwpState;
|
|
gJdwpState = nullptr;
|
|
delete gRegistry;
|
|
gRegistry = nullptr;
|
|
}
|
|
|
|
void Dbg::GcDidFinish() {
|
|
if (gDdmHpifWhen != HPIF_WHEN_NEVER) {
|
|
ScopedObjectAccess soa(Thread::Current());
|
|
VLOG(jdwp) << "Sending heap info to DDM";
|
|
DdmSendHeapInfo(gDdmHpifWhen);
|
|
}
|
|
if (gDdmHpsgWhen != HPSG_WHEN_NEVER) {
|
|
ScopedObjectAccess soa(Thread::Current());
|
|
VLOG(jdwp) << "Dumping heap to DDM";
|
|
DdmSendHeapSegments(false);
|
|
}
|
|
if (gDdmNhsgWhen != HPSG_WHEN_NEVER) {
|
|
ScopedObjectAccess soa(Thread::Current());
|
|
VLOG(jdwp) << "Dumping native heap to DDM";
|
|
DdmSendHeapSegments(true);
|
|
}
|
|
}
|
|
|
|
void Dbg::SetJdwpAllowed(bool allowed) {
|
|
gJdwpAllowed = allowed;
|
|
}
|
|
|
|
bool Dbg::IsJdwpAllowed() {
|
|
return gJdwpAllowed;
|
|
}
|
|
|
|
DebugInvokeReq* Dbg::GetInvokeReq() {
|
|
return Thread::Current()->GetInvokeReq();
|
|
}
|
|
|
|
Thread* Dbg::GetDebugThread() {
|
|
return (gJdwpState != nullptr) ? gJdwpState->GetDebugThread() : nullptr;
|
|
}
|
|
|
|
void Dbg::ClearWaitForEventThread() {
|
|
gJdwpState->ReleaseJdwpTokenForEvent();
|
|
}
|
|
|
|
void Dbg::Connected() {
|
|
CHECK(!gDebuggerConnected);
|
|
VLOG(jdwp) << "JDWP has attached";
|
|
gDebuggerConnected = true;
|
|
gDisposed = false;
|
|
}
|
|
|
|
bool Dbg::RequiresDeoptimization() {
|
|
// We don't need deoptimization if everything runs with interpreter after
|
|
// enabling -Xint mode.
|
|
return !Runtime::Current()->GetInstrumentation()->IsForcedInterpretOnly();
|
|
}
|
|
|
|
void Dbg::GoActive() {
|
|
// Enable all debugging features, including scans for breakpoints.
|
|
// This is a no-op if we're already active.
|
|
// Only called from the JDWP handler thread.
|
|
if (IsDebuggerActive()) {
|
|
return;
|
|
}
|
|
|
|
Thread* const self = Thread::Current();
|
|
{
|
|
// TODO: dalvik only warned if there were breakpoints left over. clear in Dbg::Disconnected?
|
|
ReaderMutexLock mu(self, *Locks::breakpoint_lock_);
|
|
CHECK_EQ(gBreakpoints.size(), 0U);
|
|
}
|
|
|
|
{
|
|
MutexLock mu(self, *Locks::deoptimization_lock_);
|
|
CHECK_EQ(deoptimization_requests_.size(), 0U);
|
|
CHECK_EQ(full_deoptimization_event_count_, 0U);
|
|
CHECK_EQ(dex_pc_change_event_ref_count_, 0U);
|
|
CHECK_EQ(method_enter_event_ref_count_, 0U);
|
|
CHECK_EQ(method_exit_event_ref_count_, 0U);
|
|
CHECK_EQ(field_read_event_ref_count_, 0U);
|
|
CHECK_EQ(field_write_event_ref_count_, 0U);
|
|
CHECK_EQ(exception_catch_event_ref_count_, 0U);
|
|
}
|
|
|
|
Runtime* runtime = Runtime::Current();
|
|
// Best effort deoptimization if the runtime is non-Java debuggable. This happens when
|
|
// ro.debuggable is set, but the application is not debuggable, or when a standalone
|
|
// dalvikvm invocation is not passed the debuggable option (-Xcompiler-option --debuggable).
|
|
//
|
|
// The performance cost of this is non-negligible during native-debugging due to the
|
|
// forced JIT, so we keep the AOT code in that case in exchange for limited native debugging.
|
|
if (!runtime->IsJavaDebuggable() &&
|
|
!runtime->GetInstrumentation()->IsForcedInterpretOnly() &&
|
|
!runtime->IsNativeDebuggable()) {
|
|
runtime->DeoptimizeBootImage();
|
|
}
|
|
|
|
ScopedSuspendAll ssa(__FUNCTION__);
|
|
if (RequiresDeoptimization()) {
|
|
runtime->GetInstrumentation()->EnableDeoptimization();
|
|
}
|
|
instrumentation_events_ = 0;
|
|
gDebuggerActive = true;
|
|
LOG(INFO) << "Debugger is active";
|
|
}
|
|
|
|
void Dbg::Disconnected() {
|
|
CHECK(gDebuggerConnected);
|
|
|
|
LOG(INFO) << "Debugger is no longer active";
|
|
|
|
// Suspend all threads and exclusively acquire the mutator lock. Remove the debugger as a listener
|
|
// and clear the object registry.
|
|
Runtime* runtime = Runtime::Current();
|
|
Thread* self = Thread::Current();
|
|
{
|
|
// Required for DisableDeoptimization.
|
|
gc::ScopedGCCriticalSection gcs(self,
|
|
gc::kGcCauseInstrumentation,
|
|
gc::kCollectorTypeInstrumentation);
|
|
ScopedSuspendAll ssa(__FUNCTION__);
|
|
// Debugger may not be active at this point.
|
|
if (IsDebuggerActive()) {
|
|
{
|
|
// Since we're going to disable deoptimization, we clear the deoptimization requests queue.
|
|
// This prevents us from having any pending deoptimization request when the debugger attaches
|
|
// to us again while no event has been requested yet.
|
|
MutexLock mu(self, *Locks::deoptimization_lock_);
|
|
deoptimization_requests_.clear();
|
|
full_deoptimization_event_count_ = 0U;
|
|
}
|
|
if (instrumentation_events_ != 0) {
|
|
runtime->GetInstrumentation()->RemoveListener(&gDebugInstrumentationListener,
|
|
instrumentation_events_);
|
|
instrumentation_events_ = 0;
|
|
}
|
|
if (RequiresDeoptimization()) {
|
|
runtime->GetInstrumentation()->DisableDeoptimization(kDbgInstrumentationKey);
|
|
}
|
|
gDebuggerActive = false;
|
|
}
|
|
}
|
|
|
|
{
|
|
ScopedObjectAccess soa(self);
|
|
gRegistry->Clear();
|
|
}
|
|
|
|
gDebuggerConnected = false;
|
|
}
|
|
|
|
void Dbg::ConfigureJdwp(const JDWP::JdwpOptions& jdwp_options) {
|
|
CHECK_NE(jdwp_options.transport, JDWP::kJdwpTransportUnknown);
|
|
gJdwpOptions = jdwp_options;
|
|
gJdwpConfigured = true;
|
|
}
|
|
|
|
bool Dbg::IsJdwpConfigured() {
|
|
return gJdwpConfigured;
|
|
}
|
|
|
|
int64_t Dbg::LastDebuggerActivity() {
|
|
return gJdwpState->LastDebuggerActivity();
|
|
}
|
|
|
|
void Dbg::UndoDebuggerSuspensions() {
|
|
Runtime::Current()->GetThreadList()->UndoDebuggerSuspensions();
|
|
}
|
|
|
|
std::string Dbg::GetClassName(JDWP::RefTypeId class_id) {
|
|
JDWP::JdwpError error;
|
|
mirror::Object* o = gRegistry->Get<mirror::Object*>(class_id, &error);
|
|
if (o == nullptr) {
|
|
if (error == JDWP::ERR_NONE) {
|
|
return "null";
|
|
} else {
|
|
return StringPrintf("invalid object %p", reinterpret_cast<void*>(class_id));
|
|
}
|
|
}
|
|
if (!o->IsClass()) {
|
|
return StringPrintf("non-class %p", o); // This is only used for debugging output anyway.
|
|
}
|
|
return GetClassName(o->AsClass());
|
|
}
|
|
|
|
std::string Dbg::GetClassName(mirror::Class* klass) {
|
|
if (klass == nullptr) {
|
|
return "null";
|
|
}
|
|
std::string temp;
|
|
return DescriptorToName(klass->GetDescriptor(&temp));
|
|
}
|
|
|
|
JDWP::JdwpError Dbg::GetClassObject(JDWP::RefTypeId id, JDWP::ObjectId* class_object_id) {
|
|
JDWP::JdwpError status;
|
|
mirror::Class* c = DecodeClass(id, &status);
|
|
if (c == nullptr) {
|
|
*class_object_id = 0;
|
|
return status;
|
|
}
|
|
*class_object_id = gRegistry->Add(c);
|
|
return JDWP::ERR_NONE;
|
|
}
|
|
|
|
JDWP::JdwpError Dbg::GetSuperclass(JDWP::RefTypeId id, JDWP::RefTypeId* superclass_id) {
|
|
JDWP::JdwpError status;
|
|
mirror::Class* c = DecodeClass(id, &status);
|
|
if (c == nullptr) {
|
|
*superclass_id = 0;
|
|
return status;
|
|
}
|
|
if (c->IsInterface()) {
|
|
// http://code.google.com/p/android/issues/detail?id=20856
|
|
*superclass_id = 0;
|
|
} else {
|
|
*superclass_id = gRegistry->Add(c->GetSuperClass());
|
|
}
|
|
return JDWP::ERR_NONE;
|
|
}
|
|
|
|
JDWP::JdwpError Dbg::GetClassLoader(JDWP::RefTypeId id, JDWP::ExpandBuf* pReply) {
|
|
JDWP::JdwpError error;
|
|
mirror::Class* c = DecodeClass(id, &error);
|
|
if (c == nullptr) {
|
|
return error;
|
|
}
|
|
expandBufAddObjectId(pReply, gRegistry->Add(c->GetClassLoader()));
|
|
return JDWP::ERR_NONE;
|
|
}
|
|
|
|
JDWP::JdwpError Dbg::GetModifiers(JDWP::RefTypeId id, JDWP::ExpandBuf* pReply) {
|
|
JDWP::JdwpError error;
|
|
mirror::Class* c = DecodeClass(id, &error);
|
|
if (c == nullptr) {
|
|
return error;
|
|
}
|
|
|
|
uint32_t access_flags = c->GetAccessFlags() & kAccJavaFlagsMask;
|
|
|
|
// Set ACC_SUPER. Dex files don't contain this flag but only classes are supposed to have it set,
|
|
// not interfaces.
|
|
// Class.getModifiers doesn't return it, but JDWP does, so we set it here.
|
|
if ((access_flags & kAccInterface) == 0) {
|
|
access_flags |= kAccSuper;
|
|
}
|
|
|
|
expandBufAdd4BE(pReply, access_flags);
|
|
|
|
return JDWP::ERR_NONE;
|
|
}
|
|
|
|
JDWP::JdwpError Dbg::GetMonitorInfo(JDWP::ObjectId object_id, JDWP::ExpandBuf* reply) {
|
|
JDWP::JdwpError error;
|
|
mirror::Object* o = gRegistry->Get<mirror::Object*>(object_id, &error);
|
|
if (o == nullptr) {
|
|
return JDWP::ERR_INVALID_OBJECT;
|
|
}
|
|
|
|
// Ensure all threads are suspended while we read objects' lock words.
|
|
Thread* self = Thread::Current();
|
|
CHECK_EQ(self->GetState(), kRunnable);
|
|
|
|
MonitorInfo monitor_info;
|
|
{
|
|
ScopedThreadSuspension sts(self, kSuspended);
|
|
ScopedSuspendAll ssa(__FUNCTION__);
|
|
monitor_info = MonitorInfo(o);
|
|
}
|
|
if (monitor_info.owner_ != nullptr) {
|
|
expandBufAddObjectId(reply, gRegistry->Add(monitor_info.owner_->GetPeerFromOtherThread()));
|
|
} else {
|
|
expandBufAddObjectId(reply, gRegistry->Add(nullptr));
|
|
}
|
|
expandBufAdd4BE(reply, monitor_info.entry_count_);
|
|
expandBufAdd4BE(reply, monitor_info.waiters_.size());
|
|
for (size_t i = 0; i < monitor_info.waiters_.size(); ++i) {
|
|
expandBufAddObjectId(reply, gRegistry->Add(monitor_info.waiters_[i]->GetPeerFromOtherThread()));
|
|
}
|
|
return JDWP::ERR_NONE;
|
|
}
|
|
|
|
JDWP::JdwpError Dbg::GetOwnedMonitors(JDWP::ObjectId thread_id,
|
|
std::vector<JDWP::ObjectId>* monitors,
|
|
std::vector<uint32_t>* stack_depths) {
|
|
struct OwnedMonitorVisitor : public StackVisitor {
|
|
OwnedMonitorVisitor(Thread* thread, Context* context,
|
|
std::vector<JDWP::ObjectId>* monitor_vector,
|
|
std::vector<uint32_t>* stack_depth_vector)
|
|
REQUIRES_SHARED(Locks::mutator_lock_)
|
|
: StackVisitor(thread, context, StackVisitor::StackWalkKind::kIncludeInlinedFrames),
|
|
current_stack_depth(0),
|
|
monitors(monitor_vector),
|
|
stack_depths(stack_depth_vector) {}
|
|
|
|
// TODO: Enable annotalysis. We know lock is held in constructor, but abstraction confuses
|
|
// annotalysis.
|
|
bool VisitFrame() NO_THREAD_SAFETY_ANALYSIS {
|
|
if (!GetMethod()->IsRuntimeMethod()) {
|
|
Monitor::VisitLocks(this, AppendOwnedMonitors, this);
|
|
++current_stack_depth;
|
|
}
|
|
return true;
|
|
}
|
|
|
|
static void AppendOwnedMonitors(mirror::Object* owned_monitor, void* arg)
|
|
REQUIRES_SHARED(Locks::mutator_lock_) {
|
|
OwnedMonitorVisitor* visitor = reinterpret_cast<OwnedMonitorVisitor*>(arg);
|
|
visitor->monitors->push_back(gRegistry->Add(owned_monitor));
|
|
visitor->stack_depths->push_back(visitor->current_stack_depth);
|
|
}
|
|
|
|
size_t current_stack_depth;
|
|
std::vector<JDWP::ObjectId>* const monitors;
|
|
std::vector<uint32_t>* const stack_depths;
|
|
};
|
|
|
|
ScopedObjectAccessUnchecked soa(Thread::Current());
|
|
JDWP::JdwpError error;
|
|
Thread* thread = DecodeThread(soa, thread_id, &error);
|
|
if (thread == nullptr) {
|
|
return error;
|
|
}
|
|
if (!IsSuspendedForDebugger(soa, thread)) {
|
|
return JDWP::ERR_THREAD_NOT_SUSPENDED;
|
|
}
|
|
std::unique_ptr<Context> context(Context::Create());
|
|
OwnedMonitorVisitor visitor(thread, context.get(), monitors, stack_depths);
|
|
visitor.WalkStack();
|
|
return JDWP::ERR_NONE;
|
|
}
|
|
|
|
JDWP::JdwpError Dbg::GetContendedMonitor(JDWP::ObjectId thread_id,
|
|
JDWP::ObjectId* contended_monitor) {
|
|
ScopedObjectAccessUnchecked soa(Thread::Current());
|
|
*contended_monitor = 0;
|
|
JDWP::JdwpError error;
|
|
Thread* thread = DecodeThread(soa, thread_id, &error);
|
|
if (thread == nullptr) {
|
|
return error;
|
|
}
|
|
if (!IsSuspendedForDebugger(soa, thread)) {
|
|
return JDWP::ERR_THREAD_NOT_SUSPENDED;
|
|
}
|
|
mirror::Object* contended_monitor_obj = Monitor::GetContendedMonitor(thread);
|
|
// Add() requires the thread_list_lock_ not held to avoid the lock
|
|
// level violation.
|
|
*contended_monitor = gRegistry->Add(contended_monitor_obj);
|
|
return JDWP::ERR_NONE;
|
|
}
|
|
|
|
JDWP::JdwpError Dbg::GetInstanceCounts(const std::vector<JDWP::RefTypeId>& class_ids,
|
|
std::vector<uint64_t>* counts) {
|
|
gc::Heap* heap = Runtime::Current()->GetHeap();
|
|
heap->CollectGarbage(false);
|
|
VariableSizedHandleScope hs(Thread::Current());
|
|
std::vector<Handle<mirror::Class>> classes;
|
|
counts->clear();
|
|
for (size_t i = 0; i < class_ids.size(); ++i) {
|
|
JDWP::JdwpError error;
|
|
ObjPtr<mirror::Class> c = DecodeClass(class_ids[i], &error);
|
|
if (c == nullptr) {
|
|
return error;
|
|
}
|
|
classes.push_back(hs.NewHandle(c));
|
|
counts->push_back(0);
|
|
}
|
|
heap->CountInstances(classes, false, &(*counts)[0]);
|
|
return JDWP::ERR_NONE;
|
|
}
|
|
|
|
JDWP::JdwpError Dbg::GetInstances(JDWP::RefTypeId class_id, int32_t max_count,
|
|
std::vector<JDWP::ObjectId>* instances) {
|
|
gc::Heap* heap = Runtime::Current()->GetHeap();
|
|
// We only want reachable instances, so do a GC.
|
|
heap->CollectGarbage(false);
|
|
JDWP::JdwpError error;
|
|
ObjPtr<mirror::Class> c = DecodeClass(class_id, &error);
|
|
if (c == nullptr) {
|
|
return error;
|
|
}
|
|
VariableSizedHandleScope hs(Thread::Current());
|
|
std::vector<Handle<mirror::Object>> raw_instances;
|
|
Runtime::Current()->GetHeap()->GetInstances(hs, hs.NewHandle(c), max_count, raw_instances);
|
|
for (size_t i = 0; i < raw_instances.size(); ++i) {
|
|
instances->push_back(gRegistry->Add(raw_instances[i].Get()));
|
|
}
|
|
return JDWP::ERR_NONE;
|
|
}
|
|
|
|
JDWP::JdwpError Dbg::GetReferringObjects(JDWP::ObjectId object_id, int32_t max_count,
|
|
std::vector<JDWP::ObjectId>* referring_objects) {
|
|
gc::Heap* heap = Runtime::Current()->GetHeap();
|
|
heap->CollectGarbage(false);
|
|
JDWP::JdwpError error;
|
|
ObjPtr<mirror::Object> o = gRegistry->Get<mirror::Object*>(object_id, &error);
|
|
if (o == nullptr) {
|
|
return JDWP::ERR_INVALID_OBJECT;
|
|
}
|
|
VariableSizedHandleScope hs(Thread::Current());
|
|
std::vector<Handle<mirror::Object>> raw_instances;
|
|
heap->GetReferringObjects(hs, hs.NewHandle(o), max_count, raw_instances);
|
|
for (size_t i = 0; i < raw_instances.size(); ++i) {
|
|
referring_objects->push_back(gRegistry->Add(raw_instances[i].Get()));
|
|
}
|
|
return JDWP::ERR_NONE;
|
|
}
|
|
|
|
JDWP::JdwpError Dbg::DisableCollection(JDWP::ObjectId object_id) {
|
|
JDWP::JdwpError error;
|
|
mirror::Object* o = gRegistry->Get<mirror::Object*>(object_id, &error);
|
|
if (o == nullptr) {
|
|
return JDWP::ERR_INVALID_OBJECT;
|
|
}
|
|
gRegistry->DisableCollection(object_id);
|
|
return JDWP::ERR_NONE;
|
|
}
|
|
|
|
JDWP::JdwpError Dbg::EnableCollection(JDWP::ObjectId object_id) {
|
|
JDWP::JdwpError error;
|
|
mirror::Object* o = gRegistry->Get<mirror::Object*>(object_id, &error);
|
|
// Unlike DisableCollection, JDWP specs do not state an invalid object causes an error. The RI
|
|
// also ignores these cases and never return an error. However it's not obvious why this command
|
|
// should behave differently from DisableCollection and IsCollected commands. So let's be more
|
|
// strict and return an error if this happens.
|
|
if (o == nullptr) {
|
|
return JDWP::ERR_INVALID_OBJECT;
|
|
}
|
|
gRegistry->EnableCollection(object_id);
|
|
return JDWP::ERR_NONE;
|
|
}
|
|
|
|
JDWP::JdwpError Dbg::IsCollected(JDWP::ObjectId object_id, bool* is_collected) {
|
|
*is_collected = true;
|
|
if (object_id == 0) {
|
|
// Null object id is invalid.
|
|
return JDWP::ERR_INVALID_OBJECT;
|
|
}
|
|
// JDWP specs state an INVALID_OBJECT error is returned if the object ID is not valid. However
|
|
// the RI seems to ignore this and assume object has been collected.
|
|
JDWP::JdwpError error;
|
|
mirror::Object* o = gRegistry->Get<mirror::Object*>(object_id, &error);
|
|
if (o != nullptr) {
|
|
*is_collected = gRegistry->IsCollected(object_id);
|
|
}
|
|
return JDWP::ERR_NONE;
|
|
}
|
|
|
|
void Dbg::DisposeObject(JDWP::ObjectId object_id, uint32_t reference_count) {
|
|
gRegistry->DisposeObject(object_id, reference_count);
|
|
}
|
|
|
|
JDWP::JdwpTypeTag Dbg::GetTypeTag(ObjPtr<mirror::Class> klass) {
|
|
DCHECK(klass != nullptr);
|
|
if (klass->IsArrayClass()) {
|
|
return JDWP::TT_ARRAY;
|
|
} else if (klass->IsInterface()) {
|
|
return JDWP::TT_INTERFACE;
|
|
} else {
|
|
return JDWP::TT_CLASS;
|
|
}
|
|
}
|
|
|
|
JDWP::JdwpError Dbg::GetReflectedType(JDWP::RefTypeId class_id, JDWP::ExpandBuf* pReply) {
|
|
JDWP::JdwpError error;
|
|
mirror::Class* c = DecodeClass(class_id, &error);
|
|
if (c == nullptr) {
|
|
return error;
|
|
}
|
|
|
|
JDWP::JdwpTypeTag type_tag = GetTypeTag(c);
|
|
expandBufAdd1(pReply, type_tag);
|
|
expandBufAddRefTypeId(pReply, class_id);
|
|
return JDWP::ERR_NONE;
|
|
}
|
|
|
|
// Get the complete list of reference classes (i.e. all classes except
|
|
// the primitive types).
|
|
// Returns a newly-allocated buffer full of RefTypeId values.
|
|
class ClassListCreator : public ClassVisitor {
|
|
public:
|
|
explicit ClassListCreator(std::vector<JDWP::RefTypeId>* classes) : classes_(classes) {}
|
|
|
|
bool operator()(ObjPtr<mirror::Class> c) OVERRIDE REQUIRES_SHARED(Locks::mutator_lock_) {
|
|
if (!c->IsPrimitive()) {
|
|
classes_->push_back(Dbg::GetObjectRegistry()->AddRefType(c));
|
|
}
|
|
return true;
|
|
}
|
|
|
|
private:
|
|
std::vector<JDWP::RefTypeId>* const classes_;
|
|
};
|
|
|
|
void Dbg::GetClassList(std::vector<JDWP::RefTypeId>* classes) {
|
|
ClassListCreator clc(classes);
|
|
Runtime::Current()->GetClassLinker()->VisitClassesWithoutClassesLock(&clc);
|
|
}
|
|
|
|
JDWP::JdwpError Dbg::GetClassInfo(JDWP::RefTypeId class_id, JDWP::JdwpTypeTag* pTypeTag,
|
|
uint32_t* pStatus, std::string* pDescriptor) {
|
|
JDWP::JdwpError error;
|
|
mirror::Class* c = DecodeClass(class_id, &error);
|
|
if (c == nullptr) {
|
|
return error;
|
|
}
|
|
|
|
if (c->IsArrayClass()) {
|
|
*pStatus = JDWP::CS_VERIFIED | JDWP::CS_PREPARED;
|
|
*pTypeTag = JDWP::TT_ARRAY;
|
|
} else {
|
|
if (c->IsErroneous()) {
|
|
*pStatus = JDWP::CS_ERROR;
|
|
} else {
|
|
*pStatus = JDWP::CS_VERIFIED | JDWP::CS_PREPARED | JDWP::CS_INITIALIZED;
|
|
}
|
|
*pTypeTag = c->IsInterface() ? JDWP::TT_INTERFACE : JDWP::TT_CLASS;
|
|
}
|
|
|
|
if (pDescriptor != nullptr) {
|
|
std::string temp;
|
|
*pDescriptor = c->GetDescriptor(&temp);
|
|
}
|
|
return JDWP::ERR_NONE;
|
|
}
|
|
|
|
void Dbg::FindLoadedClassBySignature(const char* descriptor, std::vector<JDWP::RefTypeId>* ids) {
|
|
std::vector<ObjPtr<mirror::Class>> classes;
|
|
Runtime::Current()->GetClassLinker()->LookupClasses(descriptor, classes);
|
|
ids->clear();
|
|
for (ObjPtr<mirror::Class> c : classes) {
|
|
ids->push_back(gRegistry->Add(c));
|
|
}
|
|
}
|
|
|
|
JDWP::JdwpError Dbg::GetReferenceType(JDWP::ObjectId object_id, JDWP::ExpandBuf* pReply) {
|
|
JDWP::JdwpError error;
|
|
mirror::Object* o = gRegistry->Get<mirror::Object*>(object_id, &error);
|
|
if (o == nullptr) {
|
|
return JDWP::ERR_INVALID_OBJECT;
|
|
}
|
|
|
|
JDWP::JdwpTypeTag type_tag = GetTypeTag(o->GetClass());
|
|
JDWP::RefTypeId type_id = gRegistry->AddRefType(o->GetClass());
|
|
|
|
expandBufAdd1(pReply, type_tag);
|
|
expandBufAddRefTypeId(pReply, type_id);
|
|
|
|
return JDWP::ERR_NONE;
|
|
}
|
|
|
|
JDWP::JdwpError Dbg::GetSignature(JDWP::RefTypeId class_id, std::string* signature) {
|
|
JDWP::JdwpError error;
|
|
mirror::Class* c = DecodeClass(class_id, &error);
|
|
if (c == nullptr) {
|
|
return error;
|
|
}
|
|
std::string temp;
|
|
*signature = c->GetDescriptor(&temp);
|
|
return JDWP::ERR_NONE;
|
|
}
|
|
|
|
JDWP::JdwpError Dbg::GetSourceDebugExtension(JDWP::RefTypeId class_id,
|
|
std::string* extension_data) {
|
|
JDWP::JdwpError error;
|
|
mirror::Class* c = DecodeClass(class_id, &error);
|
|
if (c == nullptr) {
|
|
return error;
|
|
}
|
|
StackHandleScope<1> hs(Thread::Current());
|
|
Handle<mirror::Class> klass(hs.NewHandle(c));
|
|
const char* data = annotations::GetSourceDebugExtension(klass);
|
|
if (data == nullptr) {
|
|
return JDWP::ERR_ABSENT_INFORMATION;
|
|
}
|
|
*extension_data = data;
|
|
return JDWP::ERR_NONE;
|
|
}
|
|
|
|
JDWP::JdwpError Dbg::GetSourceFile(JDWP::RefTypeId class_id, std::string* result) {
|
|
JDWP::JdwpError error;
|
|
mirror::Class* c = DecodeClass(class_id, &error);
|
|
if (c == nullptr) {
|
|
return error;
|
|
}
|
|
const char* source_file = c->GetSourceFile();
|
|
if (source_file == nullptr) {
|
|
return JDWP::ERR_ABSENT_INFORMATION;
|
|
}
|
|
*result = source_file;
|
|
return JDWP::ERR_NONE;
|
|
}
|
|
|
|
JDWP::JdwpError Dbg::GetObjectTag(JDWP::ObjectId object_id, uint8_t* tag) {
|
|
ScopedObjectAccessUnchecked soa(Thread::Current());
|
|
JDWP::JdwpError error;
|
|
mirror::Object* o = gRegistry->Get<mirror::Object*>(object_id, &error);
|
|
if (error != JDWP::ERR_NONE) {
|
|
*tag = JDWP::JT_VOID;
|
|
return error;
|
|
}
|
|
*tag = TagFromObject(soa, o);
|
|
return JDWP::ERR_NONE;
|
|
}
|
|
|
|
size_t Dbg::GetTagWidth(JDWP::JdwpTag tag) {
|
|
switch (tag) {
|
|
case JDWP::JT_VOID:
|
|
return 0;
|
|
case JDWP::JT_BYTE:
|
|
case JDWP::JT_BOOLEAN:
|
|
return 1;
|
|
case JDWP::JT_CHAR:
|
|
case JDWP::JT_SHORT:
|
|
return 2;
|
|
case JDWP::JT_FLOAT:
|
|
case JDWP::JT_INT:
|
|
return 4;
|
|
case JDWP::JT_ARRAY:
|
|
case JDWP::JT_OBJECT:
|
|
case JDWP::JT_STRING:
|
|
case JDWP::JT_THREAD:
|
|
case JDWP::JT_THREAD_GROUP:
|
|
case JDWP::JT_CLASS_LOADER:
|
|
case JDWP::JT_CLASS_OBJECT:
|
|
return sizeof(JDWP::ObjectId);
|
|
case JDWP::JT_DOUBLE:
|
|
case JDWP::JT_LONG:
|
|
return 8;
|
|
default:
|
|
LOG(FATAL) << "Unknown tag " << tag;
|
|
return -1;
|
|
}
|
|
}
|
|
|
|
JDWP::JdwpError Dbg::GetArrayLength(JDWP::ObjectId array_id, int32_t* length) {
|
|
JDWP::JdwpError error;
|
|
mirror::Array* a = DecodeNonNullArray(array_id, &error);
|
|
if (a == nullptr) {
|
|
return error;
|
|
}
|
|
*length = a->GetLength();
|
|
return JDWP::ERR_NONE;
|
|
}
|
|
|
|
JDWP::JdwpError Dbg::OutputArray(JDWP::ObjectId array_id, int offset, int count, JDWP::ExpandBuf* pReply) {
|
|
JDWP::JdwpError error;
|
|
mirror::Array* a = DecodeNonNullArray(array_id, &error);
|
|
if (a == nullptr) {
|
|
return error;
|
|
}
|
|
|
|
if (offset < 0 || count < 0 || offset > a->GetLength() || a->GetLength() - offset < count) {
|
|
LOG(WARNING) << __FUNCTION__ << " access out of bounds: offset=" << offset << "; count=" << count;
|
|
return JDWP::ERR_INVALID_LENGTH;
|
|
}
|
|
JDWP::JdwpTag element_tag = BasicTagFromClass(a->GetClass()->GetComponentType());
|
|
expandBufAdd1(pReply, element_tag);
|
|
expandBufAdd4BE(pReply, count);
|
|
|
|
if (IsPrimitiveTag(element_tag)) {
|
|
size_t width = GetTagWidth(element_tag);
|
|
uint8_t* dst = expandBufAddSpace(pReply, count * width);
|
|
if (width == 8) {
|
|
const uint64_t* src8 = reinterpret_cast<uint64_t*>(a->GetRawData(sizeof(uint64_t), 0));
|
|
for (int i = 0; i < count; ++i) JDWP::Write8BE(&dst, src8[offset + i]);
|
|
} else if (width == 4) {
|
|
const uint32_t* src4 = reinterpret_cast<uint32_t*>(a->GetRawData(sizeof(uint32_t), 0));
|
|
for (int i = 0; i < count; ++i) JDWP::Write4BE(&dst, src4[offset + i]);
|
|
} else if (width == 2) {
|
|
const uint16_t* src2 = reinterpret_cast<uint16_t*>(a->GetRawData(sizeof(uint16_t), 0));
|
|
for (int i = 0; i < count; ++i) JDWP::Write2BE(&dst, src2[offset + i]);
|
|
} else {
|
|
const uint8_t* src = reinterpret_cast<uint8_t*>(a->GetRawData(sizeof(uint8_t), 0));
|
|
memcpy(dst, &src[offset * width], count * width);
|
|
}
|
|
} else {
|
|
ScopedObjectAccessUnchecked soa(Thread::Current());
|
|
mirror::ObjectArray<mirror::Object>* oa = a->AsObjectArray<mirror::Object>();
|
|
for (int i = 0; i < count; ++i) {
|
|
mirror::Object* element = oa->Get(offset + i);
|
|
JDWP::JdwpTag specific_tag = (element != nullptr) ? TagFromObject(soa, element)
|
|
: element_tag;
|
|
expandBufAdd1(pReply, specific_tag);
|
|
expandBufAddObjectId(pReply, gRegistry->Add(element));
|
|
}
|
|
}
|
|
|
|
return JDWP::ERR_NONE;
|
|
}
|
|
|
|
template <typename T>
|
|
static void CopyArrayData(mirror::Array* a, JDWP::Request* src, int offset, int count)
|
|
NO_THREAD_SAFETY_ANALYSIS {
|
|
// TODO: fix when annotalysis correctly handles non-member functions.
|
|
DCHECK(a->GetClass()->IsPrimitiveArray());
|
|
|
|
T* dst = reinterpret_cast<T*>(a->GetRawData(sizeof(T), offset));
|
|
for (int i = 0; i < count; ++i) {
|
|
*dst++ = src->ReadValue(sizeof(T));
|
|
}
|
|
}
|
|
|
|
JDWP::JdwpError Dbg::SetArrayElements(JDWP::ObjectId array_id, int offset, int count,
|
|
JDWP::Request* request) {
|
|
JDWP::JdwpError error;
|
|
mirror::Array* dst = DecodeNonNullArray(array_id, &error);
|
|
if (dst == nullptr) {
|
|
return error;
|
|
}
|
|
|
|
if (offset < 0 || count < 0 || offset > dst->GetLength() || dst->GetLength() - offset < count) {
|
|
LOG(WARNING) << __FUNCTION__ << " access out of bounds: offset=" << offset << "; count=" << count;
|
|
return JDWP::ERR_INVALID_LENGTH;
|
|
}
|
|
JDWP::JdwpTag element_tag = BasicTagFromClass(dst->GetClass()->GetComponentType());
|
|
|
|
if (IsPrimitiveTag(element_tag)) {
|
|
size_t width = GetTagWidth(element_tag);
|
|
if (width == 8) {
|
|
CopyArrayData<uint64_t>(dst, request, offset, count);
|
|
} else if (width == 4) {
|
|
CopyArrayData<uint32_t>(dst, request, offset, count);
|
|
} else if (width == 2) {
|
|
CopyArrayData<uint16_t>(dst, request, offset, count);
|
|
} else {
|
|
CopyArrayData<uint8_t>(dst, request, offset, count);
|
|
}
|
|
} else {
|
|
mirror::ObjectArray<mirror::Object>* oa = dst->AsObjectArray<mirror::Object>();
|
|
for (int i = 0; i < count; ++i) {
|
|
JDWP::ObjectId id = request->ReadObjectId();
|
|
mirror::Object* o = gRegistry->Get<mirror::Object*>(id, &error);
|
|
if (error != JDWP::ERR_NONE) {
|
|
return error;
|
|
}
|
|
// Check if the object's type is compatible with the array's type.
|
|
if (o != nullptr && !o->InstanceOf(oa->GetClass()->GetComponentType())) {
|
|
return JDWP::ERR_TYPE_MISMATCH;
|
|
}
|
|
oa->Set<false>(offset + i, o);
|
|
}
|
|
}
|
|
|
|
return JDWP::ERR_NONE;
|
|
}
|
|
|
|
JDWP::JdwpError Dbg::CreateString(const std::string& str, JDWP::ObjectId* new_string_id) {
|
|
Thread* self = Thread::Current();
|
|
mirror::String* new_string = mirror::String::AllocFromModifiedUtf8(self, str.c_str());
|
|
if (new_string == nullptr) {
|
|
DCHECK(self->IsExceptionPending());
|
|
self->ClearException();
|
|
LOG(ERROR) << "Could not allocate string";
|
|
*new_string_id = 0;
|
|
return JDWP::ERR_OUT_OF_MEMORY;
|
|
}
|
|
*new_string_id = gRegistry->Add(new_string);
|
|
return JDWP::ERR_NONE;
|
|
}
|
|
|
|
JDWP::JdwpError Dbg::CreateObject(JDWP::RefTypeId class_id, JDWP::ObjectId* new_object_id) {
|
|
JDWP::JdwpError error;
|
|
mirror::Class* c = DecodeClass(class_id, &error);
|
|
if (c == nullptr) {
|
|
*new_object_id = 0;
|
|
return error;
|
|
}
|
|
Thread* self = Thread::Current();
|
|
ObjPtr<mirror::Object> new_object;
|
|
if (c->IsStringClass()) {
|
|
// Special case for java.lang.String.
|
|
gc::AllocatorType allocator_type = Runtime::Current()->GetHeap()->GetCurrentAllocator();
|
|
new_object = mirror::String::AllocEmptyString<true>(self, allocator_type);
|
|
} else {
|
|
new_object = c->AllocObject(self);
|
|
}
|
|
if (new_object == nullptr) {
|
|
DCHECK(self->IsExceptionPending());
|
|
self->ClearException();
|
|
LOG(ERROR) << "Could not allocate object of type " << mirror::Class::PrettyDescriptor(c);
|
|
*new_object_id = 0;
|
|
return JDWP::ERR_OUT_OF_MEMORY;
|
|
}
|
|
*new_object_id = gRegistry->Add(new_object.Ptr());
|
|
return JDWP::ERR_NONE;
|
|
}
|
|
|
|
/*
|
|
* Used by Eclipse's "Display" view to evaluate "new byte[5]" to get "(byte[]) [0, 0, 0, 0, 0]".
|
|
*/
|
|
JDWP::JdwpError Dbg::CreateArrayObject(JDWP::RefTypeId array_class_id, uint32_t length,
|
|
JDWP::ObjectId* new_array_id) {
|
|
JDWP::JdwpError error;
|
|
mirror::Class* c = DecodeClass(array_class_id, &error);
|
|
if (c == nullptr) {
|
|
*new_array_id = 0;
|
|
return error;
|
|
}
|
|
Thread* self = Thread::Current();
|
|
gc::Heap* heap = Runtime::Current()->GetHeap();
|
|
mirror::Array* new_array = mirror::Array::Alloc<true>(self, c, length,
|
|
c->GetComponentSizeShift(),
|
|
heap->GetCurrentAllocator());
|
|
if (new_array == nullptr) {
|
|
DCHECK(self->IsExceptionPending());
|
|
self->ClearException();
|
|
LOG(ERROR) << "Could not allocate array of type " << mirror::Class::PrettyDescriptor(c);
|
|
*new_array_id = 0;
|
|
return JDWP::ERR_OUT_OF_MEMORY;
|
|
}
|
|
*new_array_id = gRegistry->Add(new_array);
|
|
return JDWP::ERR_NONE;
|
|
}
|
|
|
|
JDWP::FieldId Dbg::ToFieldId(const ArtField* f) {
|
|
return static_cast<JDWP::FieldId>(reinterpret_cast<uintptr_t>(f));
|
|
}
|
|
|
|
static JDWP::MethodId ToMethodId(ArtMethod* m)
|
|
REQUIRES_SHARED(Locks::mutator_lock_) {
|
|
return static_cast<JDWP::MethodId>(
|
|
reinterpret_cast<uintptr_t>(m->GetCanonicalMethod(kRuntimePointerSize)));
|
|
}
|
|
|
|
static ArtField* FromFieldId(JDWP::FieldId fid)
|
|
REQUIRES_SHARED(Locks::mutator_lock_) {
|
|
return reinterpret_cast<ArtField*>(static_cast<uintptr_t>(fid));
|
|
}
|
|
|
|
static ArtMethod* FromMethodId(JDWP::MethodId mid)
|
|
REQUIRES_SHARED(Locks::mutator_lock_) {
|
|
return reinterpret_cast<ArtMethod*>(static_cast<uintptr_t>(mid));
|
|
}
|
|
|
|
bool Dbg::MatchThread(JDWP::ObjectId expected_thread_id, Thread* event_thread) {
|
|
CHECK(event_thread != nullptr);
|
|
JDWP::JdwpError error;
|
|
mirror::Object* expected_thread_peer = gRegistry->Get<mirror::Object*>(
|
|
expected_thread_id, &error);
|
|
return expected_thread_peer == event_thread->GetPeerFromOtherThread();
|
|
}
|
|
|
|
bool Dbg::MatchLocation(const JDWP::JdwpLocation& expected_location,
|
|
const JDWP::EventLocation& event_location) {
|
|
if (expected_location.dex_pc != event_location.dex_pc) {
|
|
return false;
|
|
}
|
|
ArtMethod* m = FromMethodId(expected_location.method_id);
|
|
return m == event_location.method;
|
|
}
|
|
|
|
bool Dbg::MatchType(ObjPtr<mirror::Class> event_class, JDWP::RefTypeId class_id) {
|
|
if (event_class == nullptr) {
|
|
return false;
|
|
}
|
|
JDWP::JdwpError error;
|
|
ObjPtr<mirror::Class> expected_class = DecodeClass(class_id, &error);
|
|
CHECK(expected_class != nullptr);
|
|
return expected_class->IsAssignableFrom(event_class);
|
|
}
|
|
|
|
bool Dbg::MatchField(JDWP::RefTypeId expected_type_id, JDWP::FieldId expected_field_id,
|
|
ArtField* event_field) {
|
|
ArtField* expected_field = FromFieldId(expected_field_id);
|
|
if (expected_field != event_field) {
|
|
return false;
|
|
}
|
|
return Dbg::MatchType(event_field->GetDeclaringClass(), expected_type_id);
|
|
}
|
|
|
|
bool Dbg::MatchInstance(JDWP::ObjectId expected_instance_id, mirror::Object* event_instance) {
|
|
JDWP::JdwpError error;
|
|
mirror::Object* modifier_instance = gRegistry->Get<mirror::Object*>(expected_instance_id, &error);
|
|
return modifier_instance == event_instance;
|
|
}
|
|
|
|
void Dbg::SetJdwpLocation(JDWP::JdwpLocation* location, ArtMethod* m, uint32_t dex_pc) {
|
|
if (m == nullptr) {
|
|
memset(location, 0, sizeof(*location));
|
|
} else {
|
|
mirror::Class* c = m->GetDeclaringClass();
|
|
location->type_tag = GetTypeTag(c);
|
|
location->class_id = gRegistry->AddRefType(c);
|
|
// The RI Seems to return 0 for all obsolete methods. For compatibility we shall do the same.
|
|
location->method_id = m->IsObsolete() ? 0 : ToMethodId(m);
|
|
location->dex_pc = (m->IsNative() || m->IsProxyMethod()) ? static_cast<uint64_t>(-1) : dex_pc;
|
|
}
|
|
}
|
|
|
|
std::string Dbg::GetMethodName(JDWP::MethodId method_id) {
|
|
ArtMethod* m = FromMethodId(method_id);
|
|
if (m == nullptr) {
|
|
return "null";
|
|
}
|
|
return m->GetInterfaceMethodIfProxy(kRuntimePointerSize)->GetName();
|
|
}
|
|
|
|
bool Dbg::IsMethodObsolete(JDWP::MethodId method_id) {
|
|
ArtMethod* m = FromMethodId(method_id);
|
|
if (m == nullptr) {
|
|
// NB Since we return 0 as MID for obsolete methods we want to default to true here.
|
|
return true;
|
|
}
|
|
return m->IsObsolete();
|
|
}
|
|
|
|
std::string Dbg::GetFieldName(JDWP::FieldId field_id) {
|
|
ArtField* f = FromFieldId(field_id);
|
|
if (f == nullptr) {
|
|
return "null";
|
|
}
|
|
return f->GetName();
|
|
}
|
|
|
|
/*
|
|
* Augment the access flags for synthetic methods and fields by setting
|
|
* the (as described by the spec) "0xf0000000 bit". Also, strip out any
|
|
* flags not specified by the Java programming language.
|
|
*/
|
|
static uint32_t MangleAccessFlags(uint32_t accessFlags) {
|
|
accessFlags &= kAccJavaFlagsMask;
|
|
if ((accessFlags & kAccSynthetic) != 0) {
|
|
accessFlags |= 0xf0000000;
|
|
}
|
|
return accessFlags;
|
|
}
|
|
|
|
/*
|
|
* Circularly shifts registers so that arguments come first. Debuggers
|
|
* expect slots to begin with arguments, but dex code places them at
|
|
* the end.
|
|
*/
|
|
static uint16_t MangleSlot(uint16_t slot, ArtMethod* m)
|
|
REQUIRES_SHARED(Locks::mutator_lock_) {
|
|
const DexFile::CodeItem* code_item = m->GetCodeItem();
|
|
if (code_item == nullptr) {
|
|
// We should not get here for a method without code (native, proxy or abstract). Log it and
|
|
// return the slot as is since all registers are arguments.
|
|
LOG(WARNING) << "Trying to mangle slot for method without code " << m->PrettyMethod();
|
|
return slot;
|
|
}
|
|
uint16_t ins_size = code_item->ins_size_;
|
|
uint16_t locals_size = code_item->registers_size_ - ins_size;
|
|
if (slot >= locals_size) {
|
|
return slot - locals_size;
|
|
} else {
|
|
return slot + ins_size;
|
|
}
|
|
}
|
|
|
|
static size_t GetMethodNumArgRegistersIncludingThis(ArtMethod* method)
|
|
REQUIRES_SHARED(Locks::mutator_lock_) {
|
|
uint32_t num_registers = ArtMethod::NumArgRegisters(method->GetShorty());
|
|
if (!method->IsStatic()) {
|
|
++num_registers;
|
|
}
|
|
return num_registers;
|
|
}
|
|
|
|
/*
|
|
* Circularly shifts registers so that arguments come last. Reverts
|
|
* slots to dex style argument placement.
|
|
*/
|
|
static uint16_t DemangleSlot(uint16_t slot, ArtMethod* m, JDWP::JdwpError* error)
|
|
REQUIRES_SHARED(Locks::mutator_lock_) {
|
|
const DexFile::CodeItem* code_item = m->GetCodeItem();
|
|
if (code_item == nullptr) {
|
|
// We should not get here for a method without code (native, proxy or abstract). Log it and
|
|
// return the slot as is since all registers are arguments.
|
|
LOG(WARNING) << "Trying to demangle slot for method without code "
|
|
<< m->PrettyMethod();
|
|
uint16_t vreg_count = GetMethodNumArgRegistersIncludingThis(m);
|
|
if (slot < vreg_count) {
|
|
*error = JDWP::ERR_NONE;
|
|
return slot;
|
|
}
|
|
} else {
|
|
if (slot < code_item->registers_size_) {
|
|
uint16_t ins_size = code_item->ins_size_;
|
|
uint16_t locals_size = code_item->registers_size_ - ins_size;
|
|
*error = JDWP::ERR_NONE;
|
|
return (slot < ins_size) ? slot + locals_size : slot - ins_size;
|
|
}
|
|
}
|
|
|
|
// Slot is invalid in the method.
|
|
LOG(ERROR) << "Invalid local slot " << slot << " for method " << m->PrettyMethod();
|
|
*error = JDWP::ERR_INVALID_SLOT;
|
|
return DexFile::kDexNoIndex16;
|
|
}
|
|
|
|
JDWP::JdwpError Dbg::OutputDeclaredFields(JDWP::RefTypeId class_id, bool with_generic,
|
|
JDWP::ExpandBuf* pReply) {
|
|
JDWP::JdwpError error;
|
|
mirror::Class* c = DecodeClass(class_id, &error);
|
|
if (c == nullptr) {
|
|
return error;
|
|
}
|
|
|
|
size_t instance_field_count = c->NumInstanceFields();
|
|
size_t static_field_count = c->NumStaticFields();
|
|
|
|
expandBufAdd4BE(pReply, instance_field_count + static_field_count);
|
|
|
|
for (size_t i = 0; i < instance_field_count + static_field_count; ++i) {
|
|
ArtField* f = (i < instance_field_count) ? c->GetInstanceField(i) :
|
|
c->GetStaticField(i - instance_field_count);
|
|
expandBufAddFieldId(pReply, ToFieldId(f));
|
|
expandBufAddUtf8String(pReply, f->GetName());
|
|
expandBufAddUtf8String(pReply, f->GetTypeDescriptor());
|
|
if (with_generic) {
|
|
static const char genericSignature[1] = "";
|
|
expandBufAddUtf8String(pReply, genericSignature);
|
|
}
|
|
expandBufAdd4BE(pReply, MangleAccessFlags(f->GetAccessFlags()));
|
|
}
|
|
return JDWP::ERR_NONE;
|
|
}
|
|
|
|
JDWP::JdwpError Dbg::OutputDeclaredMethods(JDWP::RefTypeId class_id, bool with_generic,
|
|
JDWP::ExpandBuf* pReply) {
|
|
JDWP::JdwpError error;
|
|
mirror::Class* c = DecodeClass(class_id, &error);
|
|
if (c == nullptr) {
|
|
return error;
|
|
}
|
|
|
|
expandBufAdd4BE(pReply, c->NumMethods());
|
|
|
|
auto* cl = Runtime::Current()->GetClassLinker();
|
|
auto ptr_size = cl->GetImagePointerSize();
|
|
for (ArtMethod& m : c->GetMethods(ptr_size)) {
|
|
expandBufAddMethodId(pReply, ToMethodId(&m));
|
|
expandBufAddUtf8String(pReply, m.GetInterfaceMethodIfProxy(kRuntimePointerSize)->GetName());
|
|
expandBufAddUtf8String(
|
|
pReply, m.GetInterfaceMethodIfProxy(kRuntimePointerSize)->GetSignature().ToString());
|
|
if (with_generic) {
|
|
const char* generic_signature = "";
|
|
expandBufAddUtf8String(pReply, generic_signature);
|
|
}
|
|
expandBufAdd4BE(pReply, MangleAccessFlags(m.GetAccessFlags()));
|
|
}
|
|
return JDWP::ERR_NONE;
|
|
}
|
|
|
|
JDWP::JdwpError Dbg::OutputDeclaredInterfaces(JDWP::RefTypeId class_id, JDWP::ExpandBuf* pReply) {
|
|
JDWP::JdwpError error;
|
|
Thread* self = Thread::Current();
|
|
ObjPtr<mirror::Class> c = DecodeClass(class_id, &error);
|
|
if (c == nullptr) {
|
|
return error;
|
|
}
|
|
size_t interface_count = c->NumDirectInterfaces();
|
|
expandBufAdd4BE(pReply, interface_count);
|
|
for (size_t i = 0; i < interface_count; ++i) {
|
|
ObjPtr<mirror::Class> interface = mirror::Class::GetDirectInterface(self, c, i);
|
|
DCHECK(interface != nullptr);
|
|
expandBufAddRefTypeId(pReply, gRegistry->AddRefType(interface));
|
|
}
|
|
return JDWP::ERR_NONE;
|
|
}
|
|
|
|
void Dbg::OutputLineTable(JDWP::RefTypeId, JDWP::MethodId method_id, JDWP::ExpandBuf* pReply) {
|
|
struct DebugCallbackContext {
|
|
int numItems;
|
|
JDWP::ExpandBuf* pReply;
|
|
|
|
static bool Callback(void* context, const DexFile::PositionInfo& entry) {
|
|
DebugCallbackContext* pContext = reinterpret_cast<DebugCallbackContext*>(context);
|
|
expandBufAdd8BE(pContext->pReply, entry.address_);
|
|
expandBufAdd4BE(pContext->pReply, entry.line_);
|
|
pContext->numItems++;
|
|
return false;
|
|
}
|
|
};
|
|
ArtMethod* m = FromMethodId(method_id);
|
|
const DexFile::CodeItem* code_item = m->GetCodeItem();
|
|
uint64_t start, end;
|
|
if (code_item == nullptr) {
|
|
DCHECK(m->IsNative() || m->IsProxyMethod());
|
|
start = -1;
|
|
end = -1;
|
|
} else {
|
|
start = 0;
|
|
// Return the index of the last instruction
|
|
end = code_item->insns_size_in_code_units_ - 1;
|
|
}
|
|
|
|
expandBufAdd8BE(pReply, start);
|
|
expandBufAdd8BE(pReply, end);
|
|
|
|
// Add numLines later
|
|
size_t numLinesOffset = expandBufGetLength(pReply);
|
|
expandBufAdd4BE(pReply, 0);
|
|
|
|
DebugCallbackContext context;
|
|
context.numItems = 0;
|
|
context.pReply = pReply;
|
|
|
|
if (code_item != nullptr) {
|
|
m->GetDexFile()->DecodeDebugPositionInfo(code_item, DebugCallbackContext::Callback, &context);
|
|
}
|
|
|
|
JDWP::Set4BE(expandBufGetBuffer(pReply) + numLinesOffset, context.numItems);
|
|
}
|
|
|
|
void Dbg::OutputVariableTable(JDWP::RefTypeId, JDWP::MethodId method_id, bool with_generic,
|
|
JDWP::ExpandBuf* pReply) {
|
|
struct DebugCallbackContext {
|
|
ArtMethod* method;
|
|
JDWP::ExpandBuf* pReply;
|
|
size_t variable_count;
|
|
bool with_generic;
|
|
|
|
static void Callback(void* context, const DexFile::LocalInfo& entry)
|
|
REQUIRES_SHARED(Locks::mutator_lock_) {
|
|
DebugCallbackContext* pContext = reinterpret_cast<DebugCallbackContext*>(context);
|
|
|
|
uint16_t slot = entry.reg_;
|
|
VLOG(jdwp) << StringPrintf(" %2zd: %d(%d) '%s' '%s' '%s' actual slot=%d mangled slot=%d",
|
|
pContext->variable_count, entry.start_address_,
|
|
entry.end_address_ - entry.start_address_,
|
|
entry.name_, entry.descriptor_, entry.signature_, slot,
|
|
MangleSlot(slot, pContext->method));
|
|
|
|
slot = MangleSlot(slot, pContext->method);
|
|
|
|
expandBufAdd8BE(pContext->pReply, entry.start_address_);
|
|
expandBufAddUtf8String(pContext->pReply, entry.name_);
|
|
expandBufAddUtf8String(pContext->pReply, entry.descriptor_);
|
|
if (pContext->with_generic) {
|
|
expandBufAddUtf8String(pContext->pReply, entry.signature_);
|
|
}
|
|
expandBufAdd4BE(pContext->pReply, entry.end_address_- entry.start_address_);
|
|
expandBufAdd4BE(pContext->pReply, slot);
|
|
|
|
++pContext->variable_count;
|
|
}
|
|
};
|
|
ArtMethod* m = FromMethodId(method_id);
|
|
|
|
// arg_count considers doubles and longs to take 2 units.
|
|
// variable_count considers everything to take 1 unit.
|
|
expandBufAdd4BE(pReply, GetMethodNumArgRegistersIncludingThis(m));
|
|
|
|
// We don't know the total number of variables yet, so leave a blank and update it later.
|
|
size_t variable_count_offset = expandBufGetLength(pReply);
|
|
expandBufAdd4BE(pReply, 0);
|
|
|
|
DebugCallbackContext context;
|
|
context.method = m;
|
|
context.pReply = pReply;
|
|
context.variable_count = 0;
|
|
context.with_generic = with_generic;
|
|
|
|
const DexFile::CodeItem* code_item = m->GetCodeItem();
|
|
if (code_item != nullptr) {
|
|
m->GetDexFile()->DecodeDebugLocalInfo(
|
|
code_item, m->IsStatic(), m->GetDexMethodIndex(), DebugCallbackContext::Callback,
|
|
&context);
|
|
}
|
|
|
|
JDWP::Set4BE(expandBufGetBuffer(pReply) + variable_count_offset, context.variable_count);
|
|
}
|
|
|
|
void Dbg::OutputMethodReturnValue(JDWP::MethodId method_id, const JValue* return_value,
|
|
JDWP::ExpandBuf* pReply) {
|
|
ArtMethod* m = FromMethodId(method_id);
|
|
JDWP::JdwpTag tag = BasicTagFromDescriptor(m->GetShorty());
|
|
OutputJValue(tag, return_value, pReply);
|
|
}
|
|
|
|
void Dbg::OutputFieldValue(JDWP::FieldId field_id, const JValue* field_value,
|
|
JDWP::ExpandBuf* pReply) {
|
|
ArtField* f = FromFieldId(field_id);
|
|
JDWP::JdwpTag tag = BasicTagFromDescriptor(f->GetTypeDescriptor());
|
|
OutputJValue(tag, field_value, pReply);
|
|
}
|
|
|
|
JDWP::JdwpError Dbg::GetBytecodes(JDWP::RefTypeId, JDWP::MethodId method_id,
|
|
std::vector<uint8_t>* bytecodes) {
|
|
ArtMethod* m = FromMethodId(method_id);
|
|
if (m == nullptr) {
|
|
return JDWP::ERR_INVALID_METHODID;
|
|
}
|
|
const DexFile::CodeItem* code_item = m->GetCodeItem();
|
|
size_t byte_count = code_item->insns_size_in_code_units_ * 2;
|
|
const uint8_t* begin = reinterpret_cast<const uint8_t*>(code_item->insns_);
|
|
const uint8_t* end = begin + byte_count;
|
|
for (const uint8_t* p = begin; p != end; ++p) {
|
|
bytecodes->push_back(*p);
|
|
}
|
|
return JDWP::ERR_NONE;
|
|
}
|
|
|
|
JDWP::JdwpTag Dbg::GetFieldBasicTag(JDWP::FieldId field_id) {
|
|
return BasicTagFromDescriptor(FromFieldId(field_id)->GetTypeDescriptor());
|
|
}
|
|
|
|
JDWP::JdwpTag Dbg::GetStaticFieldBasicTag(JDWP::FieldId field_id) {
|
|
return BasicTagFromDescriptor(FromFieldId(field_id)->GetTypeDescriptor());
|
|
}
|
|
|
|
static JValue GetArtFieldValue(ArtField* f, mirror::Object* o)
|
|
REQUIRES_SHARED(Locks::mutator_lock_) {
|
|
Primitive::Type fieldType = f->GetTypeAsPrimitiveType();
|
|
JValue field_value;
|
|
switch (fieldType) {
|
|
case Primitive::kPrimBoolean:
|
|
field_value.SetZ(f->GetBoolean(o));
|
|
return field_value;
|
|
|
|
case Primitive::kPrimByte:
|
|
field_value.SetB(f->GetByte(o));
|
|
return field_value;
|
|
|
|
case Primitive::kPrimChar:
|
|
field_value.SetC(f->GetChar(o));
|
|
return field_value;
|
|
|
|
case Primitive::kPrimShort:
|
|
field_value.SetS(f->GetShort(o));
|
|
return field_value;
|
|
|
|
case Primitive::kPrimInt:
|
|
case Primitive::kPrimFloat:
|
|
// Int and Float must be treated as 32-bit values in JDWP.
|
|
field_value.SetI(f->GetInt(o));
|
|
return field_value;
|
|
|
|
case Primitive::kPrimLong:
|
|
case Primitive::kPrimDouble:
|
|
// Long and Double must be treated as 64-bit values in JDWP.
|
|
field_value.SetJ(f->GetLong(o));
|
|
return field_value;
|
|
|
|
case Primitive::kPrimNot:
|
|
field_value.SetL(f->GetObject(o).Ptr());
|
|
return field_value;
|
|
|
|
case Primitive::kPrimVoid:
|
|
LOG(FATAL) << "Attempt to read from field of type 'void'";
|
|
UNREACHABLE();
|
|
}
|
|
LOG(FATAL) << "Attempt to read from field of unknown type";
|
|
UNREACHABLE();
|
|
}
|
|
|
|
static JDWP::JdwpError GetFieldValueImpl(JDWP::RefTypeId ref_type_id, JDWP::ObjectId object_id,
|
|
JDWP::FieldId field_id, JDWP::ExpandBuf* pReply,
|
|
bool is_static)
|
|
REQUIRES_SHARED(Locks::mutator_lock_) {
|
|
JDWP::JdwpError error;
|
|
mirror::Class* c = DecodeClass(ref_type_id, &error);
|
|
if (ref_type_id != 0 && c == nullptr) {
|
|
return error;
|
|
}
|
|
|
|
Thread* self = Thread::Current();
|
|
StackHandleScope<2> hs(self);
|
|
MutableHandle<mirror::Object>
|
|
o(hs.NewHandle(Dbg::GetObjectRegistry()->Get<mirror::Object*>(object_id, &error)));
|
|
if ((!is_static && o == nullptr) || error != JDWP::ERR_NONE) {
|
|
return JDWP::ERR_INVALID_OBJECT;
|
|
}
|
|
ArtField* f = FromFieldId(field_id);
|
|
|
|
mirror::Class* receiver_class = c;
|
|
if (receiver_class == nullptr && o != nullptr) {
|
|
receiver_class = o->GetClass();
|
|
}
|
|
|
|
// TODO: should we give up now if receiver_class is null?
|
|
if (receiver_class != nullptr && !f->GetDeclaringClass()->IsAssignableFrom(receiver_class)) {
|
|
LOG(INFO) << "ERR_INVALID_FIELDID: " << f->PrettyField() << " "
|
|
<< receiver_class->PrettyClass();
|
|
return JDWP::ERR_INVALID_FIELDID;
|
|
}
|
|
|
|
// Ensure the field's class is initialized.
|
|
Handle<mirror::Class> klass(hs.NewHandle(f->GetDeclaringClass()));
|
|
if (!Runtime::Current()->GetClassLinker()->EnsureInitialized(self, klass, true, false)) {
|
|
LOG(WARNING) << "Not able to initialize class for SetValues: "
|
|
<< mirror::Class::PrettyClass(klass.Get());
|
|
}
|
|
|
|
// The RI only enforces the static/non-static mismatch in one direction.
|
|
// TODO: should we change the tests and check both?
|
|
if (is_static) {
|
|
if (!f->IsStatic()) {
|
|
return JDWP::ERR_INVALID_FIELDID;
|
|
}
|
|
} else {
|
|
if (f->IsStatic()) {
|
|
LOG(WARNING) << "Ignoring non-nullptr receiver for ObjectReference.GetValues"
|
|
<< " on static field " << f->PrettyField();
|
|
}
|
|
}
|
|
if (f->IsStatic()) {
|
|
o.Assign(f->GetDeclaringClass());
|
|
}
|
|
|
|
JValue field_value(GetArtFieldValue(f, o.Get()));
|
|
JDWP::JdwpTag tag = BasicTagFromDescriptor(f->GetTypeDescriptor());
|
|
Dbg::OutputJValue(tag, &field_value, pReply);
|
|
return JDWP::ERR_NONE;
|
|
}
|
|
|
|
JDWP::JdwpError Dbg::GetFieldValue(JDWP::ObjectId object_id, JDWP::FieldId field_id,
|
|
JDWP::ExpandBuf* pReply) {
|
|
return GetFieldValueImpl(0, object_id, field_id, pReply, false);
|
|
}
|
|
|
|
JDWP::JdwpError Dbg::GetStaticFieldValue(JDWP::RefTypeId ref_type_id, JDWP::FieldId field_id,
|
|
JDWP::ExpandBuf* pReply) {
|
|
return GetFieldValueImpl(ref_type_id, 0, field_id, pReply, true);
|
|
}
|
|
|
|
static JDWP::JdwpError SetArtFieldValue(ArtField* f, mirror::Object* o, uint64_t value, int width)
|
|
REQUIRES_SHARED(Locks::mutator_lock_) {
|
|
Primitive::Type fieldType = f->GetTypeAsPrimitiveType();
|
|
// Debugging only happens at runtime so we know we are not running in a transaction.
|
|
static constexpr bool kNoTransactionMode = false;
|
|
switch (fieldType) {
|
|
case Primitive::kPrimBoolean:
|
|
CHECK_EQ(width, 1);
|
|
f->SetBoolean<kNoTransactionMode>(o, static_cast<uint8_t>(value));
|
|
return JDWP::ERR_NONE;
|
|
|
|
case Primitive::kPrimByte:
|
|
CHECK_EQ(width, 1);
|
|
f->SetByte<kNoTransactionMode>(o, static_cast<uint8_t>(value));
|
|
return JDWP::ERR_NONE;
|
|
|
|
case Primitive::kPrimChar:
|
|
CHECK_EQ(width, 2);
|
|
f->SetChar<kNoTransactionMode>(o, static_cast<uint16_t>(value));
|
|
return JDWP::ERR_NONE;
|
|
|
|
case Primitive::kPrimShort:
|
|
CHECK_EQ(width, 2);
|
|
f->SetShort<kNoTransactionMode>(o, static_cast<int16_t>(value));
|
|
return JDWP::ERR_NONE;
|
|
|
|
case Primitive::kPrimInt:
|
|
case Primitive::kPrimFloat:
|
|
CHECK_EQ(width, 4);
|
|
// Int and Float must be treated as 32-bit values in JDWP.
|
|
f->SetInt<kNoTransactionMode>(o, static_cast<int32_t>(value));
|
|
return JDWP::ERR_NONE;
|
|
|
|
case Primitive::kPrimLong:
|
|
case Primitive::kPrimDouble:
|
|
CHECK_EQ(width, 8);
|
|
// Long and Double must be treated as 64-bit values in JDWP.
|
|
f->SetLong<kNoTransactionMode>(o, value);
|
|
return JDWP::ERR_NONE;
|
|
|
|
case Primitive::kPrimNot: {
|
|
JDWP::JdwpError error;
|
|
mirror::Object* v = Dbg::GetObjectRegistry()->Get<mirror::Object*>(value, &error);
|
|
if (error != JDWP::ERR_NONE) {
|
|
return JDWP::ERR_INVALID_OBJECT;
|
|
}
|
|
if (v != nullptr) {
|
|
ObjPtr<mirror::Class> field_type;
|
|
{
|
|
StackHandleScope<2> hs(Thread::Current());
|
|
HandleWrapper<mirror::Object> h_v(hs.NewHandleWrapper(&v));
|
|
HandleWrapper<mirror::Object> h_o(hs.NewHandleWrapper(&o));
|
|
field_type = f->GetType<true>();
|
|
}
|
|
if (!field_type->IsAssignableFrom(v->GetClass())) {
|
|
return JDWP::ERR_INVALID_OBJECT;
|
|
}
|
|
}
|
|
f->SetObject<kNoTransactionMode>(o, v);
|
|
return JDWP::ERR_NONE;
|
|
}
|
|
|
|
case Primitive::kPrimVoid:
|
|
LOG(FATAL) << "Attempt to write to field of type 'void'";
|
|
UNREACHABLE();
|
|
}
|
|
LOG(FATAL) << "Attempt to write to field of unknown type";
|
|
UNREACHABLE();
|
|
}
|
|
|
|
static JDWP::JdwpError SetFieldValueImpl(JDWP::ObjectId object_id, JDWP::FieldId field_id,
|
|
uint64_t value, int width, bool is_static)
|
|
REQUIRES_SHARED(Locks::mutator_lock_) {
|
|
JDWP::JdwpError error;
|
|
Thread* self = Thread::Current();
|
|
StackHandleScope<2> hs(self);
|
|
MutableHandle<mirror::Object>
|
|
o(hs.NewHandle(Dbg::GetObjectRegistry()->Get<mirror::Object*>(object_id, &error)));
|
|
if ((!is_static && o == nullptr) || error != JDWP::ERR_NONE) {
|
|
return JDWP::ERR_INVALID_OBJECT;
|
|
}
|
|
ArtField* f = FromFieldId(field_id);
|
|
|
|
// Ensure the field's class is initialized.
|
|
Handle<mirror::Class> klass(hs.NewHandle(f->GetDeclaringClass()));
|
|
if (!Runtime::Current()->GetClassLinker()->EnsureInitialized(self, klass, true, false)) {
|
|
LOG(WARNING) << "Not able to initialize class for SetValues: "
|
|
<< mirror::Class::PrettyClass(klass.Get());
|
|
}
|
|
|
|
// The RI only enforces the static/non-static mismatch in one direction.
|
|
// TODO: should we change the tests and check both?
|
|
if (is_static) {
|
|
if (!f->IsStatic()) {
|
|
return JDWP::ERR_INVALID_FIELDID;
|
|
}
|
|
} else {
|
|
if (f->IsStatic()) {
|
|
LOG(WARNING) << "Ignoring non-nullptr receiver for ObjectReference.SetValues"
|
|
<< " on static field " << f->PrettyField();
|
|
}
|
|
}
|
|
if (f->IsStatic()) {
|
|
o.Assign(f->GetDeclaringClass());
|
|
}
|
|
return SetArtFieldValue(f, o.Get(), value, width);
|
|
}
|
|
|
|
JDWP::JdwpError Dbg::SetFieldValue(JDWP::ObjectId object_id, JDWP::FieldId field_id, uint64_t value,
|
|
int width) {
|
|
return SetFieldValueImpl(object_id, field_id, value, width, false);
|
|
}
|
|
|
|
JDWP::JdwpError Dbg::SetStaticFieldValue(JDWP::FieldId field_id, uint64_t value, int width) {
|
|
return SetFieldValueImpl(0, field_id, value, width, true);
|
|
}
|
|
|
|
JDWP::JdwpError Dbg::StringToUtf8(JDWP::ObjectId string_id, std::string* str) {
|
|
JDWP::JdwpError error;
|
|
mirror::Object* obj = gRegistry->Get<mirror::Object*>(string_id, &error);
|
|
if (error != JDWP::ERR_NONE) {
|
|
return error;
|
|
}
|
|
if (obj == nullptr) {
|
|
return JDWP::ERR_INVALID_OBJECT;
|
|
}
|
|
{
|
|
ScopedObjectAccessUnchecked soa(Thread::Current());
|
|
ObjPtr<mirror::Class> java_lang_String =
|
|
soa.Decode<mirror::Class>(WellKnownClasses::java_lang_String);
|
|
if (!java_lang_String->IsAssignableFrom(obj->GetClass())) {
|
|
// This isn't a string.
|
|
return JDWP::ERR_INVALID_STRING;
|
|
}
|
|
}
|
|
*str = obj->AsString()->ToModifiedUtf8();
|
|
return JDWP::ERR_NONE;
|
|
}
|
|
|
|
void Dbg::OutputJValue(JDWP::JdwpTag tag, const JValue* return_value, JDWP::ExpandBuf* pReply) {
|
|
if (IsPrimitiveTag(tag)) {
|
|
expandBufAdd1(pReply, tag);
|
|
if (tag == JDWP::JT_BOOLEAN || tag == JDWP::JT_BYTE) {
|
|
expandBufAdd1(pReply, return_value->GetI());
|
|
} else if (tag == JDWP::JT_CHAR || tag == JDWP::JT_SHORT) {
|
|
expandBufAdd2BE(pReply, return_value->GetI());
|
|
} else if (tag == JDWP::JT_FLOAT || tag == JDWP::JT_INT) {
|
|
expandBufAdd4BE(pReply, return_value->GetI());
|
|
} else if (tag == JDWP::JT_DOUBLE || tag == JDWP::JT_LONG) {
|
|
expandBufAdd8BE(pReply, return_value->GetJ());
|
|
} else {
|
|
CHECK_EQ(tag, JDWP::JT_VOID);
|
|
}
|
|
} else {
|
|
ScopedObjectAccessUnchecked soa(Thread::Current());
|
|
mirror::Object* value = return_value->GetL();
|
|
expandBufAdd1(pReply, TagFromObject(soa, value));
|
|
expandBufAddObjectId(pReply, gRegistry->Add(value));
|
|
}
|
|
}
|
|
|
|
JDWP::JdwpError Dbg::GetThreadName(JDWP::ObjectId thread_id, std::string* name) {
|
|
ScopedObjectAccessUnchecked soa(Thread::Current());
|
|
JDWP::JdwpError error;
|
|
DecodeThread(soa, thread_id, &error);
|
|
if (error != JDWP::ERR_NONE && error != JDWP::ERR_THREAD_NOT_ALIVE) {
|
|
return error;
|
|
}
|
|
|
|
// We still need to report the zombie threads' names, so we can't just call Thread::GetThreadName.
|
|
mirror::Object* thread_object = gRegistry->Get<mirror::Object*>(thread_id, &error);
|
|
CHECK(thread_object != nullptr) << error;
|
|
ArtField* java_lang_Thread_name_field =
|
|
jni::DecodeArtField(WellKnownClasses::java_lang_Thread_name);
|
|
ObjPtr<mirror::String> s(java_lang_Thread_name_field->GetObject(thread_object)->AsString());
|
|
if (s != nullptr) {
|
|
*name = s->ToModifiedUtf8();
|
|
}
|
|
return JDWP::ERR_NONE;
|
|
}
|
|
|
|
JDWP::JdwpError Dbg::GetThreadGroup(JDWP::ObjectId thread_id, JDWP::ExpandBuf* pReply) {
|
|
ScopedObjectAccessUnchecked soa(Thread::Current());
|
|
JDWP::JdwpError error;
|
|
mirror::Object* thread_object = gRegistry->Get<mirror::Object*>(thread_id, &error);
|
|
if (error != JDWP::ERR_NONE) {
|
|
return JDWP::ERR_INVALID_OBJECT;
|
|
}
|
|
ScopedAssertNoThreadSuspension ants("Debugger: GetThreadGroup");
|
|
// Okay, so it's an object, but is it actually a thread?
|
|
DecodeThread(soa, thread_id, &error);
|
|
if (error == JDWP::ERR_THREAD_NOT_ALIVE) {
|
|
// Zombie threads are in the null group.
|
|
expandBufAddObjectId(pReply, JDWP::ObjectId(0));
|
|
error = JDWP::ERR_NONE;
|
|
} else if (error == JDWP::ERR_NONE) {
|
|
ObjPtr<mirror::Class> c = soa.Decode<mirror::Class>(WellKnownClasses::java_lang_Thread);
|
|
CHECK(c != nullptr);
|
|
ArtField* f = jni::DecodeArtField(WellKnownClasses::java_lang_Thread_group);
|
|
CHECK(f != nullptr);
|
|
ObjPtr<mirror::Object> group = f->GetObject(thread_object);
|
|
CHECK(group != nullptr);
|
|
JDWP::ObjectId thread_group_id = gRegistry->Add(group);
|
|
expandBufAddObjectId(pReply, thread_group_id);
|
|
}
|
|
return error;
|
|
}
|
|
|
|
static mirror::Object* DecodeThreadGroup(ScopedObjectAccessUnchecked& soa,
|
|
JDWP::ObjectId thread_group_id, JDWP::JdwpError* error)
|
|
REQUIRES_SHARED(Locks::mutator_lock_) {
|
|
mirror::Object* thread_group = Dbg::GetObjectRegistry()->Get<mirror::Object*>(thread_group_id,
|
|
error);
|
|
if (*error != JDWP::ERR_NONE) {
|
|
return nullptr;
|
|
}
|
|
if (thread_group == nullptr) {
|
|
*error = JDWP::ERR_INVALID_OBJECT;
|
|
return nullptr;
|
|
}
|
|
ObjPtr<mirror::Class> c =
|
|
soa.Decode<mirror::Class>(WellKnownClasses::java_lang_ThreadGroup);
|
|
CHECK(c != nullptr);
|
|
if (!c->IsAssignableFrom(thread_group->GetClass())) {
|
|
// This is not a java.lang.ThreadGroup.
|
|
*error = JDWP::ERR_INVALID_THREAD_GROUP;
|
|
return nullptr;
|
|
}
|
|
*error = JDWP::ERR_NONE;
|
|
return thread_group;
|
|
}
|
|
|
|
JDWP::JdwpError Dbg::GetThreadGroupName(JDWP::ObjectId thread_group_id, JDWP::ExpandBuf* pReply) {
|
|
ScopedObjectAccessUnchecked soa(Thread::Current());
|
|
JDWP::JdwpError error;
|
|
mirror::Object* thread_group = DecodeThreadGroup(soa, thread_group_id, &error);
|
|
if (error != JDWP::ERR_NONE) {
|
|
return error;
|
|
}
|
|
ScopedAssertNoThreadSuspension ants("Debugger: GetThreadGroupName");
|
|
ArtField* f = jni::DecodeArtField(WellKnownClasses::java_lang_ThreadGroup_name);
|
|
CHECK(f != nullptr);
|
|
ObjPtr<mirror::String> s = f->GetObject(thread_group)->AsString();
|
|
|
|
std::string thread_group_name(s->ToModifiedUtf8());
|
|
expandBufAddUtf8String(pReply, thread_group_name);
|
|
return JDWP::ERR_NONE;
|
|
}
|
|
|
|
JDWP::JdwpError Dbg::GetThreadGroupParent(JDWP::ObjectId thread_group_id, JDWP::ExpandBuf* pReply) {
|
|
ScopedObjectAccessUnchecked soa(Thread::Current());
|
|
JDWP::JdwpError error;
|
|
mirror::Object* thread_group = DecodeThreadGroup(soa, thread_group_id, &error);
|
|
if (error != JDWP::ERR_NONE) {
|
|
return error;
|
|
}
|
|
ObjPtr<mirror::Object> parent;
|
|
{
|
|
ScopedAssertNoThreadSuspension ants("Debugger: GetThreadGroupParent");
|
|
ArtField* f = jni::DecodeArtField(WellKnownClasses::java_lang_ThreadGroup_parent);
|
|
CHECK(f != nullptr);
|
|
parent = f->GetObject(thread_group);
|
|
}
|
|
JDWP::ObjectId parent_group_id = gRegistry->Add(parent);
|
|
expandBufAddObjectId(pReply, parent_group_id);
|
|
return JDWP::ERR_NONE;
|
|
}
|
|
|
|
static void GetChildThreadGroups(mirror::Object* thread_group,
|
|
std::vector<JDWP::ObjectId>* child_thread_group_ids)
|
|
REQUIRES_SHARED(Locks::mutator_lock_) {
|
|
CHECK(thread_group != nullptr);
|
|
|
|
// Get the int "ngroups" count of this thread group...
|
|
ArtField* ngroups_field = jni::DecodeArtField(WellKnownClasses::java_lang_ThreadGroup_ngroups);
|
|
CHECK(ngroups_field != nullptr);
|
|
const int32_t size = ngroups_field->GetInt(thread_group);
|
|
if (size == 0) {
|
|
return;
|
|
}
|
|
|
|
// Get the ThreadGroup[] "groups" out of this thread group...
|
|
ArtField* groups_field = jni::DecodeArtField(WellKnownClasses::java_lang_ThreadGroup_groups);
|
|
ObjPtr<mirror::Object> groups_array = groups_field->GetObject(thread_group);
|
|
|
|
CHECK(groups_array != nullptr);
|
|
CHECK(groups_array->IsObjectArray());
|
|
|
|
ObjPtr<mirror::ObjectArray<mirror::Object>> groups_array_as_array =
|
|
groups_array->AsObjectArray<mirror::Object>();
|
|
|
|
// Copy the first 'size' elements out of the array into the result.
|
|
ObjectRegistry* registry = Dbg::GetObjectRegistry();
|
|
for (int32_t i = 0; i < size; ++i) {
|
|
child_thread_group_ids->push_back(registry->Add(groups_array_as_array->Get(i)));
|
|
}
|
|
}
|
|
|
|
JDWP::JdwpError Dbg::GetThreadGroupChildren(JDWP::ObjectId thread_group_id,
|
|
JDWP::ExpandBuf* pReply) {
|
|
ScopedObjectAccessUnchecked soa(Thread::Current());
|
|
JDWP::JdwpError error;
|
|
mirror::Object* thread_group = DecodeThreadGroup(soa, thread_group_id, &error);
|
|
if (error != JDWP::ERR_NONE) {
|
|
return error;
|
|
}
|
|
|
|
// Add child threads.
|
|
{
|
|
std::vector<JDWP::ObjectId> child_thread_ids;
|
|
GetThreads(thread_group, &child_thread_ids);
|
|
expandBufAdd4BE(pReply, child_thread_ids.size());
|
|
for (JDWP::ObjectId child_thread_id : child_thread_ids) {
|
|
expandBufAddObjectId(pReply, child_thread_id);
|
|
}
|
|
}
|
|
|
|
// Add child thread groups.
|
|
{
|
|
std::vector<JDWP::ObjectId> child_thread_groups_ids;
|
|
GetChildThreadGroups(thread_group, &child_thread_groups_ids);
|
|
expandBufAdd4BE(pReply, child_thread_groups_ids.size());
|
|
for (JDWP::ObjectId child_thread_group_id : child_thread_groups_ids) {
|
|
expandBufAddObjectId(pReply, child_thread_group_id);
|
|
}
|
|
}
|
|
|
|
return JDWP::ERR_NONE;
|
|
}
|
|
|
|
JDWP::ObjectId Dbg::GetSystemThreadGroupId() {
|
|
ScopedObjectAccessUnchecked soa(Thread::Current());
|
|
ArtField* f = jni::DecodeArtField(WellKnownClasses::java_lang_ThreadGroup_systemThreadGroup);
|
|
ObjPtr<mirror::Object> group = f->GetObject(f->GetDeclaringClass());
|
|
return gRegistry->Add(group);
|
|
}
|
|
|
|
JDWP::JdwpThreadStatus Dbg::ToJdwpThreadStatus(ThreadState state) {
|
|
switch (state) {
|
|
case kBlocked:
|
|
return JDWP::TS_MONITOR;
|
|
case kNative:
|
|
case kRunnable:
|
|
case kSuspended:
|
|
return JDWP::TS_RUNNING;
|
|
case kSleeping:
|
|
return JDWP::TS_SLEEPING;
|
|
case kStarting:
|
|
case kTerminated:
|
|
return JDWP::TS_ZOMBIE;
|
|
case kTimedWaiting:
|
|
case kWaitingForCheckPointsToRun:
|
|
case kWaitingForDebuggerSend:
|
|
case kWaitingForDebuggerSuspension:
|
|
case kWaitingForDebuggerToAttach:
|
|
case kWaitingForDeoptimization:
|
|
case kWaitingForGcToComplete:
|
|
case kWaitingForGetObjectsAllocated:
|
|
case kWaitingForJniOnLoad:
|
|
case kWaitingForMethodTracingStart:
|
|
case kWaitingForSignalCatcherOutput:
|
|
case kWaitingForVisitObjects:
|
|
case kWaitingInMainDebuggerLoop:
|
|
case kWaitingInMainSignalCatcherLoop:
|
|
case kWaitingPerformingGc:
|
|
case kWaitingWeakGcRootRead:
|
|
case kWaitingForGcThreadFlip:
|
|
case kWaiting:
|
|
return JDWP::TS_WAIT;
|
|
// Don't add a 'default' here so the compiler can spot incompatible enum changes.
|
|
}
|
|
LOG(FATAL) << "Unknown thread state: " << state;
|
|
return JDWP::TS_ZOMBIE;
|
|
}
|
|
|
|
JDWP::JdwpError Dbg::GetThreadStatus(JDWP::ObjectId thread_id, JDWP::JdwpThreadStatus* pThreadStatus,
|
|
JDWP::JdwpSuspendStatus* pSuspendStatus) {
|
|
ScopedObjectAccess soa(Thread::Current());
|
|
|
|
*pSuspendStatus = JDWP::SUSPEND_STATUS_NOT_SUSPENDED;
|
|
|
|
JDWP::JdwpError error;
|
|
Thread* thread = DecodeThread(soa, thread_id, &error);
|
|
if (error != JDWP::ERR_NONE) {
|
|
if (error == JDWP::ERR_THREAD_NOT_ALIVE) {
|
|
*pThreadStatus = JDWP::TS_ZOMBIE;
|
|
return JDWP::ERR_NONE;
|
|
}
|
|
return error;
|
|
}
|
|
|
|
if (IsSuspendedForDebugger(soa, thread)) {
|
|
*pSuspendStatus = JDWP::SUSPEND_STATUS_SUSPENDED;
|
|
}
|
|
|
|
*pThreadStatus = ToJdwpThreadStatus(thread->GetState());
|
|
return JDWP::ERR_NONE;
|
|
}
|
|
|
|
JDWP::JdwpError Dbg::GetThreadDebugSuspendCount(JDWP::ObjectId thread_id, JDWP::ExpandBuf* pReply) {
|
|
ScopedObjectAccess soa(Thread::Current());
|
|
JDWP::JdwpError error;
|
|
Thread* thread = DecodeThread(soa, thread_id, &error);
|
|
if (error != JDWP::ERR_NONE) {
|
|
return error;
|
|
}
|
|
MutexLock mu2(soa.Self(), *Locks::thread_suspend_count_lock_);
|
|
expandBufAdd4BE(pReply, thread->GetDebugSuspendCount());
|
|
return JDWP::ERR_NONE;
|
|
}
|
|
|
|
JDWP::JdwpError Dbg::Interrupt(JDWP::ObjectId thread_id) {
|
|
ScopedObjectAccess soa(Thread::Current());
|
|
JDWP::JdwpError error;
|
|
Thread* thread = DecodeThread(soa, thread_id, &error);
|
|
if (error != JDWP::ERR_NONE) {
|
|
return error;
|
|
}
|
|
thread->Interrupt(soa.Self());
|
|
return JDWP::ERR_NONE;
|
|
}
|
|
|
|
static bool IsInDesiredThreadGroup(mirror::Object* desired_thread_group, mirror::Object* peer)
|
|
REQUIRES_SHARED(Locks::mutator_lock_) {
|
|
// Do we want threads from all thread groups?
|
|
if (desired_thread_group == nullptr) {
|
|
return true;
|
|
}
|
|
ArtField* thread_group_field = jni::DecodeArtField(WellKnownClasses::java_lang_Thread_group);
|
|
DCHECK(thread_group_field != nullptr);
|
|
ObjPtr<mirror::Object> group = thread_group_field->GetObject(peer);
|
|
return (group == desired_thread_group);
|
|
}
|
|
|
|
void Dbg::GetThreads(mirror::Object* thread_group, std::vector<JDWP::ObjectId>* thread_ids) {
|
|
ScopedObjectAccessUnchecked soa(Thread::Current());
|
|
std::list<Thread*> all_threads_list;
|
|
{
|
|
MutexLock mu(Thread::Current(), *Locks::thread_list_lock_);
|
|
all_threads_list = Runtime::Current()->GetThreadList()->GetList();
|
|
}
|
|
for (Thread* t : all_threads_list) {
|
|
if (t == Dbg::GetDebugThread()) {
|
|
// Skip the JDWP thread. Some debuggers get bent out of shape when they can't suspend and
|
|
// query all threads, so it's easier if we just don't tell them about this thread.
|
|
continue;
|
|
}
|
|
if (t->IsStillStarting()) {
|
|
// This thread is being started (and has been registered in the thread list). However, it is
|
|
// not completely started yet so we must ignore it.
|
|
continue;
|
|
}
|
|
mirror::Object* peer = t->GetPeerFromOtherThread();
|
|
if (peer == nullptr) {
|
|
// peer might be null if the thread is still starting up. We can't tell the debugger about
|
|
// this thread yet.
|
|
// TODO: if we identified threads to the debugger by their Thread*
|
|
// rather than their peer's mirror::Object*, we could fix this.
|
|
// Doing so might help us report ZOMBIE threads too.
|
|
continue;
|
|
}
|
|
if (IsInDesiredThreadGroup(thread_group, peer)) {
|
|
thread_ids->push_back(gRegistry->Add(peer));
|
|
}
|
|
}
|
|
}
|
|
|
|
static int GetStackDepth(Thread* thread) REQUIRES_SHARED(Locks::mutator_lock_) {
|
|
struct CountStackDepthVisitor : public StackVisitor {
|
|
explicit CountStackDepthVisitor(Thread* thread_in)
|
|
: StackVisitor(thread_in, nullptr, StackVisitor::StackWalkKind::kIncludeInlinedFrames),
|
|
depth(0) {}
|
|
|
|
// TODO: Enable annotalysis. We know lock is held in constructor, but abstraction confuses
|
|
// annotalysis.
|
|
bool VisitFrame() NO_THREAD_SAFETY_ANALYSIS {
|
|
if (!GetMethod()->IsRuntimeMethod()) {
|
|
++depth;
|
|
}
|
|
return true;
|
|
}
|
|
size_t depth;
|
|
};
|
|
|
|
CountStackDepthVisitor visitor(thread);
|
|
visitor.WalkStack();
|
|
return visitor.depth;
|
|
}
|
|
|
|
JDWP::JdwpError Dbg::GetThreadFrameCount(JDWP::ObjectId thread_id, size_t* result) {
|
|
ScopedObjectAccess soa(Thread::Current());
|
|
JDWP::JdwpError error;
|
|
*result = 0;
|
|
Thread* thread = DecodeThread(soa, thread_id, &error);
|
|
if (error != JDWP::ERR_NONE) {
|
|
return error;
|
|
}
|
|
if (!IsSuspendedForDebugger(soa, thread)) {
|
|
return JDWP::ERR_THREAD_NOT_SUSPENDED;
|
|
}
|
|
*result = GetStackDepth(thread);
|
|
return JDWP::ERR_NONE;
|
|
}
|
|
|
|
JDWP::JdwpError Dbg::GetThreadFrames(JDWP::ObjectId thread_id, size_t start_frame,
|
|
size_t frame_count, JDWP::ExpandBuf* buf) {
|
|
class GetFrameVisitor : public StackVisitor {
|
|
public:
|
|
GetFrameVisitor(Thread* thread, size_t start_frame_in, size_t frame_count_in,
|
|
JDWP::ExpandBuf* buf_in)
|
|
REQUIRES_SHARED(Locks::mutator_lock_)
|
|
: StackVisitor(thread, nullptr, StackVisitor::StackWalkKind::kIncludeInlinedFrames),
|
|
depth_(0),
|
|
start_frame_(start_frame_in),
|
|
frame_count_(frame_count_in),
|
|
buf_(buf_in) {
|
|
expandBufAdd4BE(buf_, frame_count_);
|
|
}
|
|
|
|
bool VisitFrame() OVERRIDE REQUIRES_SHARED(Locks::mutator_lock_) {
|
|
if (GetMethod()->IsRuntimeMethod()) {
|
|
return true; // The debugger can't do anything useful with a frame that has no Method*.
|
|
}
|
|
if (depth_ >= start_frame_ + frame_count_) {
|
|
return false;
|
|
}
|
|
if (depth_ >= start_frame_) {
|
|
JDWP::FrameId frame_id(GetFrameId());
|
|
JDWP::JdwpLocation location;
|
|
SetJdwpLocation(&location, GetMethod(), GetDexPc());
|
|
VLOG(jdwp) << StringPrintf(" Frame %3zd: id=%3" PRIu64 " ", depth_, frame_id) << location;
|
|
expandBufAdd8BE(buf_, frame_id);
|
|
expandBufAddLocation(buf_, location);
|
|
}
|
|
++depth_;
|
|
return true;
|
|
}
|
|
|
|
private:
|
|
size_t depth_;
|
|
const size_t start_frame_;
|
|
const size_t frame_count_;
|
|
JDWP::ExpandBuf* buf_;
|
|
};
|
|
|
|
ScopedObjectAccessUnchecked soa(Thread::Current());
|
|
JDWP::JdwpError error;
|
|
Thread* thread = DecodeThread(soa, thread_id, &error);
|
|
if (error != JDWP::ERR_NONE) {
|
|
return error;
|
|
}
|
|
if (!IsSuspendedForDebugger(soa, thread)) {
|
|
return JDWP::ERR_THREAD_NOT_SUSPENDED;
|
|
}
|
|
GetFrameVisitor visitor(thread, start_frame, frame_count, buf);
|
|
visitor.WalkStack();
|
|
return JDWP::ERR_NONE;
|
|
}
|
|
|
|
JDWP::ObjectId Dbg::GetThreadSelfId() {
|
|
return GetThreadId(Thread::Current());
|
|
}
|
|
|
|
JDWP::ObjectId Dbg::GetThreadId(Thread* thread) {
|
|
ScopedObjectAccessUnchecked soa(Thread::Current());
|
|
return gRegistry->Add(thread->GetPeerFromOtherThread());
|
|
}
|
|
|
|
void Dbg::SuspendVM() {
|
|
// Avoid a deadlock between GC and debugger where GC gets suspended during GC. b/25800335.
|
|
gc::ScopedGCCriticalSection gcs(Thread::Current(),
|
|
gc::kGcCauseDebugger,
|
|
gc::kCollectorTypeDebugger);
|
|
Runtime::Current()->GetThreadList()->SuspendAllForDebugger();
|
|
}
|
|
|
|
void Dbg::ResumeVM() {
|
|
Runtime::Current()->GetThreadList()->ResumeAllForDebugger();
|
|
}
|
|
|
|
JDWP::JdwpError Dbg::SuspendThread(JDWP::ObjectId thread_id, bool request_suspension) {
|
|
Thread* self = Thread::Current();
|
|
ScopedLocalRef<jobject> peer(self->GetJniEnv(), nullptr);
|
|
{
|
|
ScopedObjectAccess soa(self);
|
|
JDWP::JdwpError error;
|
|
peer.reset(soa.AddLocalReference<jobject>(gRegistry->Get<mirror::Object*>(thread_id, &error)));
|
|
}
|
|
if (peer.get() == nullptr) {
|
|
return JDWP::ERR_THREAD_NOT_ALIVE;
|
|
}
|
|
// Suspend thread to build stack trace.
|
|
bool timed_out;
|
|
ThreadList* thread_list = Runtime::Current()->GetThreadList();
|
|
Thread* thread = thread_list->SuspendThreadByPeer(peer.get(),
|
|
request_suspension,
|
|
SuspendReason::kForDebugger,
|
|
&timed_out);
|
|
if (thread != nullptr) {
|
|
return JDWP::ERR_NONE;
|
|
} else if (timed_out) {
|
|
return JDWP::ERR_INTERNAL;
|
|
} else {
|
|
return JDWP::ERR_THREAD_NOT_ALIVE;
|
|
}
|
|
}
|
|
|
|
void Dbg::ResumeThread(JDWP::ObjectId thread_id) {
|
|
ScopedObjectAccessUnchecked soa(Thread::Current());
|
|
JDWP::JdwpError error;
|
|
mirror::Object* peer = gRegistry->Get<mirror::Object*>(thread_id, &error);
|
|
CHECK(peer != nullptr) << error;
|
|
Thread* thread;
|
|
{
|
|
MutexLock mu(soa.Self(), *Locks::thread_list_lock_);
|
|
thread = Thread::FromManagedThread(soa, peer);
|
|
}
|
|
if (thread == nullptr) {
|
|
LOG(WARNING) << "No such thread for resume: " << peer;
|
|
return;
|
|
}
|
|
bool needs_resume;
|
|
{
|
|
MutexLock mu2(soa.Self(), *Locks::thread_suspend_count_lock_);
|
|
needs_resume = thread->GetDebugSuspendCount() > 0;
|
|
}
|
|
if (needs_resume) {
|
|
bool resumed = Runtime::Current()->GetThreadList()->Resume(thread, SuspendReason::kForDebugger);
|
|
DCHECK(resumed);
|
|
}
|
|
}
|
|
|
|
void Dbg::SuspendSelf() {
|
|
Runtime::Current()->GetThreadList()->SuspendSelfForDebugger();
|
|
}
|
|
|
|
struct GetThisVisitor : public StackVisitor {
|
|
GetThisVisitor(Thread* thread, Context* context, JDWP::FrameId frame_id_in)
|
|
REQUIRES_SHARED(Locks::mutator_lock_)
|
|
: StackVisitor(thread, context, StackVisitor::StackWalkKind::kIncludeInlinedFrames),
|
|
this_object(nullptr),
|
|
frame_id(frame_id_in) {}
|
|
|
|
// TODO: Enable annotalysis. We know lock is held in constructor, but abstraction confuses
|
|
// annotalysis.
|
|
virtual bool VisitFrame() NO_THREAD_SAFETY_ANALYSIS {
|
|
if (frame_id != GetFrameId()) {
|
|
return true; // continue
|
|
} else {
|
|
this_object = GetThisObject();
|
|
return false;
|
|
}
|
|
}
|
|
|
|
mirror::Object* this_object;
|
|
JDWP::FrameId frame_id;
|
|
};
|
|
|
|
JDWP::JdwpError Dbg::GetThisObject(JDWP::ObjectId thread_id, JDWP::FrameId frame_id,
|
|
JDWP::ObjectId* result) {
|
|
ScopedObjectAccessUnchecked soa(Thread::Current());
|
|
JDWP::JdwpError error;
|
|
Thread* thread = DecodeThread(soa, thread_id, &error);
|
|
if (error != JDWP::ERR_NONE) {
|
|
return error;
|
|
}
|
|
if (!IsSuspendedForDebugger(soa, thread)) {
|
|
return JDWP::ERR_THREAD_NOT_SUSPENDED;
|
|
}
|
|
std::unique_ptr<Context> context(Context::Create());
|
|
GetThisVisitor visitor(thread, context.get(), frame_id);
|
|
visitor.WalkStack();
|
|
*result = gRegistry->Add(visitor.this_object);
|
|
return JDWP::ERR_NONE;
|
|
}
|
|
|
|
// Walks the stack until we find the frame with the given FrameId.
|
|
class FindFrameVisitor FINAL : public StackVisitor {
|
|
public:
|
|
FindFrameVisitor(Thread* thread, Context* context, JDWP::FrameId frame_id)
|
|
REQUIRES_SHARED(Locks::mutator_lock_)
|
|
: StackVisitor(thread, context, StackVisitor::StackWalkKind::kIncludeInlinedFrames),
|
|
frame_id_(frame_id),
|
|
error_(JDWP::ERR_INVALID_FRAMEID) {}
|
|
|
|
// TODO: Enable annotalysis. We know lock is held in constructor, but abstraction confuses
|
|
// annotalysis.
|
|
bool VisitFrame() NO_THREAD_SAFETY_ANALYSIS {
|
|
if (GetFrameId() != frame_id_) {
|
|
return true; // Not our frame, carry on.
|
|
}
|
|
ArtMethod* m = GetMethod();
|
|
if (m->IsNative()) {
|
|
// We can't read/write local value from/into native method.
|
|
error_ = JDWP::ERR_OPAQUE_FRAME;
|
|
} else {
|
|
// We found our frame.
|
|
error_ = JDWP::ERR_NONE;
|
|
}
|
|
return false;
|
|
}
|
|
|
|
JDWP::JdwpError GetError() const {
|
|
return error_;
|
|
}
|
|
|
|
private:
|
|
const JDWP::FrameId frame_id_;
|
|
JDWP::JdwpError error_;
|
|
|
|
DISALLOW_COPY_AND_ASSIGN(FindFrameVisitor);
|
|
};
|
|
|
|
JDWP::JdwpError Dbg::GetLocalValues(JDWP::Request* request, JDWP::ExpandBuf* pReply) {
|
|
JDWP::ObjectId thread_id = request->ReadThreadId();
|
|
JDWP::FrameId frame_id = request->ReadFrameId();
|
|
|
|
ScopedObjectAccessUnchecked soa(Thread::Current());
|
|
JDWP::JdwpError error;
|
|
Thread* thread = DecodeThread(soa, thread_id, &error);
|
|
if (error != JDWP::ERR_NONE) {
|
|
return error;
|
|
}
|
|
if (!IsSuspendedForDebugger(soa, thread)) {
|
|
return JDWP::ERR_THREAD_NOT_SUSPENDED;
|
|
}
|
|
// Find the frame with the given frame_id.
|
|
std::unique_ptr<Context> context(Context::Create());
|
|
FindFrameVisitor visitor(thread, context.get(), frame_id);
|
|
visitor.WalkStack();
|
|
if (visitor.GetError() != JDWP::ERR_NONE) {
|
|
return visitor.GetError();
|
|
}
|
|
|
|
// Read the values from visitor's context.
|
|
int32_t slot_count = request->ReadSigned32("slot count");
|
|
expandBufAdd4BE(pReply, slot_count); /* "int values" */
|
|
for (int32_t i = 0; i < slot_count; ++i) {
|
|
uint32_t slot = request->ReadUnsigned32("slot");
|
|
JDWP::JdwpTag reqSigByte = request->ReadTag();
|
|
|
|
VLOG(jdwp) << " --> slot " << slot << " " << reqSigByte;
|
|
|
|
size_t width = Dbg::GetTagWidth(reqSigByte);
|
|
uint8_t* ptr = expandBufAddSpace(pReply, width + 1);
|
|
error = Dbg::GetLocalValue(visitor, soa, slot, reqSigByte, ptr, width);
|
|
if (error != JDWP::ERR_NONE) {
|
|
return error;
|
|
}
|
|
}
|
|
return JDWP::ERR_NONE;
|
|
}
|
|
|
|
constexpr JDWP::JdwpError kStackFrameLocalAccessError = JDWP::ERR_ABSENT_INFORMATION;
|
|
|
|
static std::string GetStackContextAsString(const StackVisitor& visitor)
|
|
REQUIRES_SHARED(Locks::mutator_lock_) {
|
|
return StringPrintf(" at DEX pc 0x%08x in method %s", visitor.GetDexPc(false),
|
|
ArtMethod::PrettyMethod(visitor.GetMethod()).c_str());
|
|
}
|
|
|
|
static JDWP::JdwpError FailGetLocalValue(const StackVisitor& visitor, uint16_t vreg,
|
|
JDWP::JdwpTag tag)
|
|
REQUIRES_SHARED(Locks::mutator_lock_) {
|
|
LOG(ERROR) << "Failed to read " << tag << " local from register v" << vreg
|
|
<< GetStackContextAsString(visitor);
|
|
return kStackFrameLocalAccessError;
|
|
}
|
|
|
|
JDWP::JdwpError Dbg::GetLocalValue(const StackVisitor& visitor, ScopedObjectAccessUnchecked& soa,
|
|
int slot, JDWP::JdwpTag tag, uint8_t* buf, size_t width) {
|
|
ArtMethod* m = visitor.GetMethod();
|
|
JDWP::JdwpError error = JDWP::ERR_NONE;
|
|
uint16_t vreg = DemangleSlot(slot, m, &error);
|
|
if (error != JDWP::ERR_NONE) {
|
|
return error;
|
|
}
|
|
// TODO: check that the tag is compatible with the actual type of the slot!
|
|
switch (tag) {
|
|
case JDWP::JT_BOOLEAN: {
|
|
CHECK_EQ(width, 1U);
|
|
uint32_t intVal;
|
|
if (!visitor.GetVReg(m, vreg, kIntVReg, &intVal)) {
|
|
return FailGetLocalValue(visitor, vreg, tag);
|
|
}
|
|
VLOG(jdwp) << "get boolean local " << vreg << " = " << intVal;
|
|
JDWP::Set1(buf + 1, intVal != 0);
|
|
break;
|
|
}
|
|
case JDWP::JT_BYTE: {
|
|
CHECK_EQ(width, 1U);
|
|
uint32_t intVal;
|
|
if (!visitor.GetVReg(m, vreg, kIntVReg, &intVal)) {
|
|
return FailGetLocalValue(visitor, vreg, tag);
|
|
}
|
|
VLOG(jdwp) << "get byte local " << vreg << " = " << intVal;
|
|
JDWP::Set1(buf + 1, intVal);
|
|
break;
|
|
}
|
|
case JDWP::JT_SHORT:
|
|
case JDWP::JT_CHAR: {
|
|
CHECK_EQ(width, 2U);
|
|
uint32_t intVal;
|
|
if (!visitor.GetVReg(m, vreg, kIntVReg, &intVal)) {
|
|
return FailGetLocalValue(visitor, vreg, tag);
|
|
}
|
|
VLOG(jdwp) << "get short/char local " << vreg << " = " << intVal;
|
|
JDWP::Set2BE(buf + 1, intVal);
|
|
break;
|
|
}
|
|
case JDWP::JT_INT: {
|
|
CHECK_EQ(width, 4U);
|
|
uint32_t intVal;
|
|
if (!visitor.GetVReg(m, vreg, kIntVReg, &intVal)) {
|
|
return FailGetLocalValue(visitor, vreg, tag);
|
|
}
|
|
VLOG(jdwp) << "get int local " << vreg << " = " << intVal;
|
|
JDWP::Set4BE(buf + 1, intVal);
|
|
break;
|
|
}
|
|
case JDWP::JT_FLOAT: {
|
|
CHECK_EQ(width, 4U);
|
|
uint32_t intVal;
|
|
if (!visitor.GetVReg(m, vreg, kFloatVReg, &intVal)) {
|
|
return FailGetLocalValue(visitor, vreg, tag);
|
|
}
|
|
VLOG(jdwp) << "get float local " << vreg << " = " << intVal;
|
|
JDWP::Set4BE(buf + 1, intVal);
|
|
break;
|
|
}
|
|
case JDWP::JT_ARRAY:
|
|
case JDWP::JT_CLASS_LOADER:
|
|
case JDWP::JT_CLASS_OBJECT:
|
|
case JDWP::JT_OBJECT:
|
|
case JDWP::JT_STRING:
|
|
case JDWP::JT_THREAD:
|
|
case JDWP::JT_THREAD_GROUP: {
|
|
CHECK_EQ(width, sizeof(JDWP::ObjectId));
|
|
uint32_t intVal;
|
|
if (!visitor.GetVReg(m, vreg, kReferenceVReg, &intVal)) {
|
|
return FailGetLocalValue(visitor, vreg, tag);
|
|
}
|
|
mirror::Object* o = reinterpret_cast<mirror::Object*>(intVal);
|
|
VLOG(jdwp) << "get " << tag << " object local " << vreg << " = " << o;
|
|
if (!Runtime::Current()->GetHeap()->IsValidObjectAddress(o)) {
|
|
LOG(FATAL) << StringPrintf("Found invalid object %#" PRIxPTR " in register v%u",
|
|
reinterpret_cast<uintptr_t>(o), vreg)
|
|
<< GetStackContextAsString(visitor);
|
|
UNREACHABLE();
|
|
}
|
|
tag = TagFromObject(soa, o);
|
|
JDWP::SetObjectId(buf + 1, gRegistry->Add(o));
|
|
break;
|
|
}
|
|
case JDWP::JT_DOUBLE: {
|
|
CHECK_EQ(width, 8U);
|
|
uint64_t longVal;
|
|
if (!visitor.GetVRegPair(m, vreg, kDoubleLoVReg, kDoubleHiVReg, &longVal)) {
|
|
return FailGetLocalValue(visitor, vreg, tag);
|
|
}
|
|
VLOG(jdwp) << "get double local " << vreg << " = " << longVal;
|
|
JDWP::Set8BE(buf + 1, longVal);
|
|
break;
|
|
}
|
|
case JDWP::JT_LONG: {
|
|
CHECK_EQ(width, 8U);
|
|
uint64_t longVal;
|
|
if (!visitor.GetVRegPair(m, vreg, kLongLoVReg, kLongHiVReg, &longVal)) {
|
|
return FailGetLocalValue(visitor, vreg, tag);
|
|
}
|
|
VLOG(jdwp) << "get long local " << vreg << " = " << longVal;
|
|
JDWP::Set8BE(buf + 1, longVal);
|
|
break;
|
|
}
|
|
default:
|
|
LOG(FATAL) << "Unknown tag " << tag;
|
|
UNREACHABLE();
|
|
}
|
|
|
|
// Prepend tag, which may have been updated.
|
|
JDWP::Set1(buf, tag);
|
|
return JDWP::ERR_NONE;
|
|
}
|
|
|
|
JDWP::JdwpError Dbg::SetLocalValues(JDWP::Request* request) {
|
|
JDWP::ObjectId thread_id = request->ReadThreadId();
|
|
JDWP::FrameId frame_id = request->ReadFrameId();
|
|
|
|
ScopedObjectAccessUnchecked soa(Thread::Current());
|
|
JDWP::JdwpError error;
|
|
Thread* thread = DecodeThread(soa, thread_id, &error);
|
|
if (error != JDWP::ERR_NONE) {
|
|
return error;
|
|
}
|
|
if (!IsSuspendedForDebugger(soa, thread)) {
|
|
return JDWP::ERR_THREAD_NOT_SUSPENDED;
|
|
}
|
|
// Find the frame with the given frame_id.
|
|
std::unique_ptr<Context> context(Context::Create());
|
|
FindFrameVisitor visitor(thread, context.get(), frame_id);
|
|
visitor.WalkStack();
|
|
if (visitor.GetError() != JDWP::ERR_NONE) {
|
|
return visitor.GetError();
|
|
}
|
|
|
|
// Writes the values into visitor's context.
|
|
int32_t slot_count = request->ReadSigned32("slot count");
|
|
for (int32_t i = 0; i < slot_count; ++i) {
|
|
uint32_t slot = request->ReadUnsigned32("slot");
|
|
JDWP::JdwpTag sigByte = request->ReadTag();
|
|
size_t width = Dbg::GetTagWidth(sigByte);
|
|
uint64_t value = request->ReadValue(width);
|
|
|
|
VLOG(jdwp) << " --> slot " << slot << " " << sigByte << " " << value;
|
|
error = Dbg::SetLocalValue(thread, visitor, slot, sigByte, value, width);
|
|
if (error != JDWP::ERR_NONE) {
|
|
return error;
|
|
}
|
|
}
|
|
return JDWP::ERR_NONE;
|
|
}
|
|
|
|
template<typename T>
|
|
static JDWP::JdwpError FailSetLocalValue(const StackVisitor& visitor, uint16_t vreg,
|
|
JDWP::JdwpTag tag, T value)
|
|
REQUIRES_SHARED(Locks::mutator_lock_) {
|
|
LOG(ERROR) << "Failed to write " << tag << " local " << value
|
|
<< " (0x" << std::hex << value << ") into register v" << vreg
|
|
<< GetStackContextAsString(visitor);
|
|
return kStackFrameLocalAccessError;
|
|
}
|
|
|
|
JDWP::JdwpError Dbg::SetLocalValue(Thread* thread, StackVisitor& visitor, int slot,
|
|
JDWP::JdwpTag tag, uint64_t value, size_t width) {
|
|
ArtMethod* m = visitor.GetMethod();
|
|
JDWP::JdwpError error = JDWP::ERR_NONE;
|
|
uint16_t vreg = DemangleSlot(slot, m, &error);
|
|
if (error != JDWP::ERR_NONE) {
|
|
return error;
|
|
}
|
|
// TODO: check that the tag is compatible with the actual type of the slot!
|
|
switch (tag) {
|
|
case JDWP::JT_BOOLEAN:
|
|
case JDWP::JT_BYTE:
|
|
CHECK_EQ(width, 1U);
|
|
if (!visitor.SetVReg(m, vreg, static_cast<uint32_t>(value), kIntVReg)) {
|
|
return FailSetLocalValue(visitor, vreg, tag, static_cast<uint32_t>(value));
|
|
}
|
|
break;
|
|
case JDWP::JT_SHORT:
|
|
case JDWP::JT_CHAR:
|
|
CHECK_EQ(width, 2U);
|
|
if (!visitor.SetVReg(m, vreg, static_cast<uint32_t>(value), kIntVReg)) {
|
|
return FailSetLocalValue(visitor, vreg, tag, static_cast<uint32_t>(value));
|
|
}
|
|
break;
|
|
case JDWP::JT_INT:
|
|
CHECK_EQ(width, 4U);
|
|
if (!visitor.SetVReg(m, vreg, static_cast<uint32_t>(value), kIntVReg)) {
|
|
return FailSetLocalValue(visitor, vreg, tag, static_cast<uint32_t>(value));
|
|
}
|
|
break;
|
|
case JDWP::JT_FLOAT:
|
|
CHECK_EQ(width, 4U);
|
|
if (!visitor.SetVReg(m, vreg, static_cast<uint32_t>(value), kFloatVReg)) {
|
|
return FailSetLocalValue(visitor, vreg, tag, static_cast<uint32_t>(value));
|
|
}
|
|
break;
|
|
case JDWP::JT_ARRAY:
|
|
case JDWP::JT_CLASS_LOADER:
|
|
case JDWP::JT_CLASS_OBJECT:
|
|
case JDWP::JT_OBJECT:
|
|
case JDWP::JT_STRING:
|
|
case JDWP::JT_THREAD:
|
|
case JDWP::JT_THREAD_GROUP: {
|
|
CHECK_EQ(width, sizeof(JDWP::ObjectId));
|
|
mirror::Object* o = gRegistry->Get<mirror::Object*>(static_cast<JDWP::ObjectId>(value),
|
|
&error);
|
|
if (error != JDWP::ERR_NONE) {
|
|
VLOG(jdwp) << tag << " object " << o << " is an invalid object";
|
|
return JDWP::ERR_INVALID_OBJECT;
|
|
}
|
|
if (!visitor.SetVReg(m, vreg, static_cast<uint32_t>(reinterpret_cast<uintptr_t>(o)),
|
|
kReferenceVReg)) {
|
|
return FailSetLocalValue(visitor, vreg, tag, reinterpret_cast<uintptr_t>(o));
|
|
}
|
|
break;
|
|
}
|
|
case JDWP::JT_DOUBLE: {
|
|
CHECK_EQ(width, 8U);
|
|
if (!visitor.SetVRegPair(m, vreg, value, kDoubleLoVReg, kDoubleHiVReg)) {
|
|
return FailSetLocalValue(visitor, vreg, tag, value);
|
|
}
|
|
break;
|
|
}
|
|
case JDWP::JT_LONG: {
|
|
CHECK_EQ(width, 8U);
|
|
if (!visitor.SetVRegPair(m, vreg, value, kLongLoVReg, kLongHiVReg)) {
|
|
return FailSetLocalValue(visitor, vreg, tag, value);
|
|
}
|
|
break;
|
|
}
|
|
default:
|
|
LOG(FATAL) << "Unknown tag " << tag;
|
|
UNREACHABLE();
|
|
}
|
|
|
|
// If we set the local variable in a compiled frame, we need to trigger a deoptimization of
|
|
// the stack so we continue execution with the interpreter using the new value(s) of the updated
|
|
// local variable(s). To achieve this, we install instrumentation exit stub on each method of the
|
|
// thread's stack. The stub will cause the deoptimization to happen.
|
|
if (!visitor.IsShadowFrame() && thread->HasDebuggerShadowFrames()) {
|
|
Runtime::Current()->GetInstrumentation()->InstrumentThreadStack(thread);
|
|
}
|
|
|
|
return JDWP::ERR_NONE;
|
|
}
|
|
|
|
static void SetEventLocation(JDWP::EventLocation* location, ArtMethod* m, uint32_t dex_pc)
|
|
REQUIRES_SHARED(Locks::mutator_lock_) {
|
|
DCHECK(location != nullptr);
|
|
if (m == nullptr) {
|
|
memset(location, 0, sizeof(*location));
|
|
} else {
|
|
location->method = m->GetCanonicalMethod(kRuntimePointerSize);
|
|
location->dex_pc = (m->IsNative() || m->IsProxyMethod()) ? static_cast<uint32_t>(-1) : dex_pc;
|
|
}
|
|
}
|
|
|
|
void Dbg::PostLocationEvent(ArtMethod* m, int dex_pc, mirror::Object* this_object,
|
|
int event_flags, const JValue* return_value) {
|
|
if (!IsDebuggerActive()) {
|
|
return;
|
|
}
|
|
DCHECK(m != nullptr);
|
|
DCHECK_EQ(m->IsStatic(), this_object == nullptr);
|
|
JDWP::EventLocation location;
|
|
SetEventLocation(&location, m, dex_pc);
|
|
|
|
// We need to be sure no exception is pending when calling JdwpState::PostLocationEvent.
|
|
// This is required to be able to call JNI functions to create JDWP ids. To achieve this,
|
|
// we temporarily clear the current thread's exception (if any) and will restore it after
|
|
// the call.
|
|
// Note: the only way to get a pending exception here is to suspend on a move-exception
|
|
// instruction.
|
|
Thread* const self = Thread::Current();
|
|
StackHandleScope<1> hs(self);
|
|
Handle<mirror::Throwable> pending_exception(hs.NewHandle(self->GetException()));
|
|
self->ClearException();
|
|
if (kIsDebugBuild && pending_exception != nullptr) {
|
|
const DexFile::CodeItem* code_item = location.method->GetCodeItem();
|
|
const Instruction* instr = Instruction::At(&code_item->insns_[location.dex_pc]);
|
|
CHECK_EQ(Instruction::MOVE_EXCEPTION, instr->Opcode());
|
|
}
|
|
|
|
gJdwpState->PostLocationEvent(&location, this_object, event_flags, return_value);
|
|
|
|
if (pending_exception != nullptr) {
|
|
self->SetException(pending_exception.Get());
|
|
}
|
|
}
|
|
|
|
void Dbg::PostFieldAccessEvent(ArtMethod* m, int dex_pc,
|
|
mirror::Object* this_object, ArtField* f) {
|
|
// TODO We should send events for native methods.
|
|
if (!IsDebuggerActive() || m->IsNative()) {
|
|
return;
|
|
}
|
|
DCHECK(m != nullptr);
|
|
DCHECK(f != nullptr);
|
|
JDWP::EventLocation location;
|
|
SetEventLocation(&location, m, dex_pc);
|
|
|
|
gJdwpState->PostFieldEvent(&location, f, this_object, nullptr, false);
|
|
}
|
|
|
|
void Dbg::PostFieldModificationEvent(ArtMethod* m, int dex_pc,
|
|
mirror::Object* this_object, ArtField* f,
|
|
const JValue* field_value) {
|
|
// TODO We should send events for native methods.
|
|
if (!IsDebuggerActive() || m->IsNative()) {
|
|
return;
|
|
}
|
|
DCHECK(m != nullptr);
|
|
DCHECK(f != nullptr);
|
|
DCHECK(field_value != nullptr);
|
|
JDWP::EventLocation location;
|
|
SetEventLocation(&location, m, dex_pc);
|
|
|
|
gJdwpState->PostFieldEvent(&location, f, this_object, field_value, true);
|
|
}
|
|
|
|
/**
|
|
* Finds the location where this exception will be caught. We search until we reach the top
|
|
* frame, in which case this exception is considered uncaught.
|
|
*/
|
|
class CatchLocationFinder : public StackVisitor {
|
|
public:
|
|
CatchLocationFinder(Thread* self, const Handle<mirror::Throwable>& exception, Context* context)
|
|
REQUIRES_SHARED(Locks::mutator_lock_)
|
|
: StackVisitor(self, context, StackVisitor::StackWalkKind::kIncludeInlinedFrames),
|
|
exception_(exception),
|
|
handle_scope_(self),
|
|
this_at_throw_(handle_scope_.NewHandle<mirror::Object>(nullptr)),
|
|
catch_method_(nullptr),
|
|
throw_method_(nullptr),
|
|
catch_dex_pc_(DexFile::kDexNoIndex),
|
|
throw_dex_pc_(DexFile::kDexNoIndex) {
|
|
}
|
|
|
|
bool VisitFrame() OVERRIDE REQUIRES_SHARED(Locks::mutator_lock_) {
|
|
ArtMethod* method = GetMethod();
|
|
DCHECK(method != nullptr);
|
|
if (method->IsRuntimeMethod()) {
|
|
// Ignore callee save method.
|
|
DCHECK(method->IsCalleeSaveMethod());
|
|
return true;
|
|
}
|
|
|
|
uint32_t dex_pc = GetDexPc();
|
|
if (throw_method_ == nullptr) {
|
|
// First Java method found. It is either the method that threw the exception,
|
|
// or the Java native method that is reporting an exception thrown by
|
|
// native code.
|
|
this_at_throw_.Assign(GetThisObject());
|
|
throw_method_ = method;
|
|
throw_dex_pc_ = dex_pc;
|
|
}
|
|
|
|
if (dex_pc != DexFile::kDexNoIndex) {
|
|
StackHandleScope<1> hs(GetThread());
|
|
uint32_t found_dex_pc;
|
|
Handle<mirror::Class> exception_class(hs.NewHandle(exception_->GetClass()));
|
|
bool unused_clear_exception;
|
|
found_dex_pc = method->FindCatchBlock(exception_class, dex_pc, &unused_clear_exception);
|
|
if (found_dex_pc != DexFile::kDexNoIndex) {
|
|
catch_method_ = method;
|
|
catch_dex_pc_ = found_dex_pc;
|
|
return false; // End stack walk.
|
|
}
|
|
}
|
|
return true; // Continue stack walk.
|
|
}
|
|
|
|
ArtMethod* GetCatchMethod() REQUIRES_SHARED(Locks::mutator_lock_) {
|
|
return catch_method_;
|
|
}
|
|
|
|
ArtMethod* GetThrowMethod() REQUIRES_SHARED(Locks::mutator_lock_) {
|
|
return throw_method_;
|
|
}
|
|
|
|
mirror::Object* GetThisAtThrow() REQUIRES_SHARED(Locks::mutator_lock_) {
|
|
return this_at_throw_.Get();
|
|
}
|
|
|
|
uint32_t GetCatchDexPc() const {
|
|
return catch_dex_pc_;
|
|
}
|
|
|
|
uint32_t GetThrowDexPc() const {
|
|
return throw_dex_pc_;
|
|
}
|
|
|
|
private:
|
|
const Handle<mirror::Throwable>& exception_;
|
|
StackHandleScope<1> handle_scope_;
|
|
MutableHandle<mirror::Object> this_at_throw_;
|
|
ArtMethod* catch_method_;
|
|
ArtMethod* throw_method_;
|
|
uint32_t catch_dex_pc_;
|
|
uint32_t throw_dex_pc_;
|
|
|
|
DISALLOW_COPY_AND_ASSIGN(CatchLocationFinder);
|
|
};
|
|
|
|
void Dbg::PostException(mirror::Throwable* exception_object) {
|
|
if (!IsDebuggerActive()) {
|
|
return;
|
|
}
|
|
Thread* const self = Thread::Current();
|
|
StackHandleScope<1> handle_scope(self);
|
|
Handle<mirror::Throwable> h_exception(handle_scope.NewHandle(exception_object));
|
|
std::unique_ptr<Context> context(Context::Create());
|
|
CatchLocationFinder clf(self, h_exception, context.get());
|
|
clf.WalkStack(/* include_transitions */ false);
|
|
JDWP::EventLocation exception_throw_location;
|
|
SetEventLocation(&exception_throw_location, clf.GetThrowMethod(), clf.GetThrowDexPc());
|
|
JDWP::EventLocation exception_catch_location;
|
|
SetEventLocation(&exception_catch_location, clf.GetCatchMethod(), clf.GetCatchDexPc());
|
|
|
|
gJdwpState->PostException(&exception_throw_location, h_exception.Get(), &exception_catch_location,
|
|
clf.GetThisAtThrow());
|
|
}
|
|
|
|
void Dbg::PostClassPrepare(mirror::Class* c) {
|
|
if (!IsDebuggerActive()) {
|
|
return;
|
|
}
|
|
gJdwpState->PostClassPrepare(c);
|
|
}
|
|
|
|
void Dbg::UpdateDebugger(Thread* thread, mirror::Object* this_object,
|
|
ArtMethod* m, uint32_t dex_pc,
|
|
int event_flags, const JValue* return_value) {
|
|
if (!IsDebuggerActive() || dex_pc == static_cast<uint32_t>(-2) /* fake method exit */) {
|
|
return;
|
|
}
|
|
|
|
if (IsBreakpoint(m, dex_pc)) {
|
|
event_flags |= kBreakpoint;
|
|
}
|
|
|
|
// If the debugger is single-stepping one of our threads, check to
|
|
// see if we're that thread and we've reached a step point.
|
|
const SingleStepControl* single_step_control = thread->GetSingleStepControl();
|
|
if (single_step_control != nullptr) {
|
|
CHECK(!m->IsNative());
|
|
if (single_step_control->GetStepDepth() == JDWP::SD_INTO) {
|
|
// Step into method calls. We break when the line number
|
|
// or method pointer changes. If we're in SS_MIN mode, we
|
|
// always stop.
|
|
if (single_step_control->GetMethod() != m) {
|
|
event_flags |= kSingleStep;
|
|
VLOG(jdwp) << "SS new method";
|
|
} else if (single_step_control->GetStepSize() == JDWP::SS_MIN) {
|
|
event_flags |= kSingleStep;
|
|
VLOG(jdwp) << "SS new instruction";
|
|
} else if (single_step_control->ContainsDexPc(dex_pc)) {
|
|
event_flags |= kSingleStep;
|
|
VLOG(jdwp) << "SS new line";
|
|
}
|
|
} else if (single_step_control->GetStepDepth() == JDWP::SD_OVER) {
|
|
// Step over method calls. We break when the line number is
|
|
// different and the frame depth is <= the original frame
|
|
// depth. (We can't just compare on the method, because we
|
|
// might get unrolled past it by an exception, and it's tricky
|
|
// to identify recursion.)
|
|
|
|
int stack_depth = GetStackDepth(thread);
|
|
|
|
if (stack_depth < single_step_control->GetStackDepth()) {
|
|
// Popped up one or more frames, always trigger.
|
|
event_flags |= kSingleStep;
|
|
VLOG(jdwp) << "SS method pop";
|
|
} else if (stack_depth == single_step_control->GetStackDepth()) {
|
|
// Same depth, see if we moved.
|
|
if (single_step_control->GetStepSize() == JDWP::SS_MIN) {
|
|
event_flags |= kSingleStep;
|
|
VLOG(jdwp) << "SS new instruction";
|
|
} else if (single_step_control->ContainsDexPc(dex_pc)) {
|
|
event_flags |= kSingleStep;
|
|
VLOG(jdwp) << "SS new line";
|
|
}
|
|
}
|
|
} else {
|
|
CHECK_EQ(single_step_control->GetStepDepth(), JDWP::SD_OUT);
|
|
// Return from the current method. We break when the frame
|
|
// depth pops up.
|
|
|
|
// This differs from the "method exit" break in that it stops
|
|
// with the PC at the next instruction in the returned-to
|
|
// function, rather than the end of the returning function.
|
|
|
|
int stack_depth = GetStackDepth(thread);
|
|
if (stack_depth < single_step_control->GetStackDepth()) {
|
|
event_flags |= kSingleStep;
|
|
VLOG(jdwp) << "SS method pop";
|
|
}
|
|
}
|
|
}
|
|
|
|
// If there's something interesting going on, see if it matches one
|
|
// of the debugger filters.
|
|
if (event_flags != 0) {
|
|
Dbg::PostLocationEvent(m, dex_pc, this_object, event_flags, return_value);
|
|
}
|
|
}
|
|
|
|
size_t* Dbg::GetReferenceCounterForEvent(uint32_t instrumentation_event) {
|
|
switch (instrumentation_event) {
|
|
case instrumentation::Instrumentation::kMethodEntered:
|
|
return &method_enter_event_ref_count_;
|
|
case instrumentation::Instrumentation::kMethodExited:
|
|
return &method_exit_event_ref_count_;
|
|
case instrumentation::Instrumentation::kDexPcMoved:
|
|
return &dex_pc_change_event_ref_count_;
|
|
case instrumentation::Instrumentation::kFieldRead:
|
|
return &field_read_event_ref_count_;
|
|
case instrumentation::Instrumentation::kFieldWritten:
|
|
return &field_write_event_ref_count_;
|
|
case instrumentation::Instrumentation::kExceptionCaught:
|
|
return &exception_catch_event_ref_count_;
|
|
default:
|
|
return nullptr;
|
|
}
|
|
}
|
|
|
|
// Process request while all mutator threads are suspended.
|
|
void Dbg::ProcessDeoptimizationRequest(const DeoptimizationRequest& request) {
|
|
instrumentation::Instrumentation* instrumentation = Runtime::Current()->GetInstrumentation();
|
|
switch (request.GetKind()) {
|
|
case DeoptimizationRequest::kNothing:
|
|
LOG(WARNING) << "Ignoring empty deoptimization request.";
|
|
break;
|
|
case DeoptimizationRequest::kRegisterForEvent:
|
|
VLOG(jdwp) << StringPrintf("Add debugger as listener for instrumentation event 0x%x",
|
|
request.InstrumentationEvent());
|
|
instrumentation->AddListener(&gDebugInstrumentationListener, request.InstrumentationEvent());
|
|
instrumentation_events_ |= request.InstrumentationEvent();
|
|
break;
|
|
case DeoptimizationRequest::kUnregisterForEvent:
|
|
VLOG(jdwp) << StringPrintf("Remove debugger as listener for instrumentation event 0x%x",
|
|
request.InstrumentationEvent());
|
|
instrumentation->RemoveListener(&gDebugInstrumentationListener,
|
|
request.InstrumentationEvent());
|
|
instrumentation_events_ &= ~request.InstrumentationEvent();
|
|
break;
|
|
case DeoptimizationRequest::kFullDeoptimization:
|
|
VLOG(jdwp) << "Deoptimize the world ...";
|
|
instrumentation->DeoptimizeEverything(kDbgInstrumentationKey);
|
|
VLOG(jdwp) << "Deoptimize the world DONE";
|
|
break;
|
|
case DeoptimizationRequest::kFullUndeoptimization:
|
|
VLOG(jdwp) << "Undeoptimize the world ...";
|
|
instrumentation->UndeoptimizeEverything(kDbgInstrumentationKey);
|
|
VLOG(jdwp) << "Undeoptimize the world DONE";
|
|
break;
|
|
case DeoptimizationRequest::kSelectiveDeoptimization:
|
|
VLOG(jdwp) << "Deoptimize method " << ArtMethod::PrettyMethod(request.Method()) << " ...";
|
|
instrumentation->Deoptimize(request.Method());
|
|
VLOG(jdwp) << "Deoptimize method " << ArtMethod::PrettyMethod(request.Method()) << " DONE";
|
|
break;
|
|
case DeoptimizationRequest::kSelectiveUndeoptimization:
|
|
VLOG(jdwp) << "Undeoptimize method " << ArtMethod::PrettyMethod(request.Method()) << " ...";
|
|
instrumentation->Undeoptimize(request.Method());
|
|
VLOG(jdwp) << "Undeoptimize method " << ArtMethod::PrettyMethod(request.Method()) << " DONE";
|
|
break;
|
|
default:
|
|
LOG(FATAL) << "Unsupported deoptimization request kind " << request.GetKind();
|
|
break;
|
|
}
|
|
}
|
|
|
|
void Dbg::RequestDeoptimization(const DeoptimizationRequest& req) {
|
|
if (req.GetKind() == DeoptimizationRequest::kNothing) {
|
|
// Nothing to do.
|
|
return;
|
|
}
|
|
MutexLock mu(Thread::Current(), *Locks::deoptimization_lock_);
|
|
RequestDeoptimizationLocked(req);
|
|
}
|
|
|
|
void Dbg::RequestDeoptimizationLocked(const DeoptimizationRequest& req) {
|
|
switch (req.GetKind()) {
|
|
case DeoptimizationRequest::kRegisterForEvent: {
|
|
DCHECK_NE(req.InstrumentationEvent(), 0u);
|
|
size_t* counter = GetReferenceCounterForEvent(req.InstrumentationEvent());
|
|
CHECK(counter != nullptr) << StringPrintf("No counter for instrumentation event 0x%x",
|
|
req.InstrumentationEvent());
|
|
if (*counter == 0) {
|
|
VLOG(jdwp) << StringPrintf("Queue request #%zd to start listening to instrumentation event 0x%x",
|
|
deoptimization_requests_.size(), req.InstrumentationEvent());
|
|
deoptimization_requests_.push_back(req);
|
|
}
|
|
*counter = *counter + 1;
|
|
break;
|
|
}
|
|
case DeoptimizationRequest::kUnregisterForEvent: {
|
|
DCHECK_NE(req.InstrumentationEvent(), 0u);
|
|
size_t* counter = GetReferenceCounterForEvent(req.InstrumentationEvent());
|
|
CHECK(counter != nullptr) << StringPrintf("No counter for instrumentation event 0x%x",
|
|
req.InstrumentationEvent());
|
|
*counter = *counter - 1;
|
|
if (*counter == 0) {
|
|
VLOG(jdwp) << StringPrintf("Queue request #%zd to stop listening to instrumentation event 0x%x",
|
|
deoptimization_requests_.size(), req.InstrumentationEvent());
|
|
deoptimization_requests_.push_back(req);
|
|
}
|
|
break;
|
|
}
|
|
case DeoptimizationRequest::kFullDeoptimization: {
|
|
DCHECK(req.Method() == nullptr);
|
|
if (full_deoptimization_event_count_ == 0) {
|
|
VLOG(jdwp) << "Queue request #" << deoptimization_requests_.size()
|
|
<< " for full deoptimization";
|
|
deoptimization_requests_.push_back(req);
|
|
}
|
|
++full_deoptimization_event_count_;
|
|
break;
|
|
}
|
|
case DeoptimizationRequest::kFullUndeoptimization: {
|
|
DCHECK(req.Method() == nullptr);
|
|
DCHECK_GT(full_deoptimization_event_count_, 0U);
|
|
--full_deoptimization_event_count_;
|
|
if (full_deoptimization_event_count_ == 0) {
|
|
VLOG(jdwp) << "Queue request #" << deoptimization_requests_.size()
|
|
<< " for full undeoptimization";
|
|
deoptimization_requests_.push_back(req);
|
|
}
|
|
break;
|
|
}
|
|
case DeoptimizationRequest::kSelectiveDeoptimization: {
|
|
DCHECK(req.Method() != nullptr);
|
|
VLOG(jdwp) << "Queue request #" << deoptimization_requests_.size()
|
|
<< " for deoptimization of " << req.Method()->PrettyMethod();
|
|
deoptimization_requests_.push_back(req);
|
|
break;
|
|
}
|
|
case DeoptimizationRequest::kSelectiveUndeoptimization: {
|
|
DCHECK(req.Method() != nullptr);
|
|
VLOG(jdwp) << "Queue request #" << deoptimization_requests_.size()
|
|
<< " for undeoptimization of " << req.Method()->PrettyMethod();
|
|
deoptimization_requests_.push_back(req);
|
|
break;
|
|
}
|
|
default: {
|
|
LOG(FATAL) << "Unknown deoptimization request kind " << req.GetKind();
|
|
break;
|
|
}
|
|
}
|
|
}
|
|
|
|
void Dbg::ManageDeoptimization() {
|
|
Thread* const self = Thread::Current();
|
|
{
|
|
// Avoid suspend/resume if there is no pending request.
|
|
MutexLock mu(self, *Locks::deoptimization_lock_);
|
|
if (deoptimization_requests_.empty()) {
|
|
return;
|
|
}
|
|
}
|
|
CHECK_EQ(self->GetState(), kRunnable);
|
|
ScopedThreadSuspension sts(self, kWaitingForDeoptimization);
|
|
// Required for ProcessDeoptimizationRequest.
|
|
gc::ScopedGCCriticalSection gcs(self,
|
|
gc::kGcCauseInstrumentation,
|
|
gc::kCollectorTypeInstrumentation);
|
|
// We need to suspend mutator threads first.
|
|
ScopedSuspendAll ssa(__FUNCTION__);
|
|
const ThreadState old_state = self->SetStateUnsafe(kRunnable);
|
|
{
|
|
MutexLock mu(self, *Locks::deoptimization_lock_);
|
|
size_t req_index = 0;
|
|
for (DeoptimizationRequest& request : deoptimization_requests_) {
|
|
VLOG(jdwp) << "Process deoptimization request #" << req_index++;
|
|
ProcessDeoptimizationRequest(request);
|
|
}
|
|
deoptimization_requests_.clear();
|
|
}
|
|
CHECK_EQ(self->SetStateUnsafe(old_state), kRunnable);
|
|
}
|
|
|
|
static const Breakpoint* FindFirstBreakpointForMethod(ArtMethod* m)
|
|
REQUIRES_SHARED(Locks::mutator_lock_, Locks::breakpoint_lock_) {
|
|
for (Breakpoint& breakpoint : gBreakpoints) {
|
|
if (breakpoint.IsInMethod(m)) {
|
|
return &breakpoint;
|
|
}
|
|
}
|
|
return nullptr;
|
|
}
|
|
|
|
bool Dbg::MethodHasAnyBreakpoints(ArtMethod* method) {
|
|
ReaderMutexLock mu(Thread::Current(), *Locks::breakpoint_lock_);
|
|
return FindFirstBreakpointForMethod(method) != nullptr;
|
|
}
|
|
|
|
// Sanity checks all existing breakpoints on the same method.
|
|
static void SanityCheckExistingBreakpoints(ArtMethod* m,
|
|
DeoptimizationRequest::Kind deoptimization_kind)
|
|
REQUIRES_SHARED(Locks::mutator_lock_, Locks::breakpoint_lock_) {
|
|
for (const Breakpoint& breakpoint : gBreakpoints) {
|
|
if (breakpoint.IsInMethod(m)) {
|
|
CHECK_EQ(deoptimization_kind, breakpoint.GetDeoptimizationKind());
|
|
}
|
|
}
|
|
instrumentation::Instrumentation* instrumentation = Runtime::Current()->GetInstrumentation();
|
|
if (deoptimization_kind == DeoptimizationRequest::kFullDeoptimization) {
|
|
// We should have deoptimized everything but not "selectively" deoptimized this method.
|
|
CHECK(instrumentation->AreAllMethodsDeoptimized());
|
|
CHECK(!instrumentation->IsDeoptimized(m));
|
|
} else if (deoptimization_kind == DeoptimizationRequest::kSelectiveDeoptimization) {
|
|
// We should have "selectively" deoptimized this method.
|
|
// Note: while we have not deoptimized everything for this method, we may have done it for
|
|
// another event.
|
|
CHECK(instrumentation->IsDeoptimized(m));
|
|
} else {
|
|
// This method does not require deoptimization.
|
|
CHECK_EQ(deoptimization_kind, DeoptimizationRequest::kNothing);
|
|
CHECK(!instrumentation->IsDeoptimized(m));
|
|
}
|
|
}
|
|
|
|
// Returns the deoptimization kind required to set a breakpoint in a method.
|
|
// If a breakpoint has already been set, we also return the first breakpoint
|
|
// through the given 'existing_brkpt' pointer.
|
|
static DeoptimizationRequest::Kind GetRequiredDeoptimizationKind(Thread* self,
|
|
ArtMethod* m,
|
|
const Breakpoint** existing_brkpt)
|
|
REQUIRES_SHARED(Locks::mutator_lock_) {
|
|
if (!Dbg::RequiresDeoptimization()) {
|
|
// We already run in interpreter-only mode so we don't need to deoptimize anything.
|
|
VLOG(jdwp) << "No need for deoptimization when fully running with interpreter for method "
|
|
<< ArtMethod::PrettyMethod(m);
|
|
return DeoptimizationRequest::kNothing;
|
|
}
|
|
const Breakpoint* first_breakpoint;
|
|
{
|
|
ReaderMutexLock mu(self, *Locks::breakpoint_lock_);
|
|
first_breakpoint = FindFirstBreakpointForMethod(m);
|
|
*existing_brkpt = first_breakpoint;
|
|
}
|
|
|
|
if (first_breakpoint == nullptr) {
|
|
// There is no breakpoint on this method yet: we need to deoptimize. If this method is default,
|
|
// we deoptimize everything; otherwise we deoptimize only this method. We
|
|
// deoptimize with defaults because we do not know everywhere they are used. It is possible some
|
|
// of the copies could be missed.
|
|
// TODO Deoptimizing on default methods might not be necessary in all cases.
|
|
bool need_full_deoptimization = m->IsDefault();
|
|
if (need_full_deoptimization) {
|
|
VLOG(jdwp) << "Need full deoptimization because of copying of method "
|
|
<< ArtMethod::PrettyMethod(m);
|
|
return DeoptimizationRequest::kFullDeoptimization;
|
|
} else {
|
|
// We don't need to deoptimize if the method has not been compiled.
|
|
const bool is_compiled = m->HasAnyCompiledCode();
|
|
if (is_compiled) {
|
|
VLOG(jdwp) << "Need selective deoptimization for compiled method "
|
|
<< ArtMethod::PrettyMethod(m);
|
|
return DeoptimizationRequest::kSelectiveDeoptimization;
|
|
} else {
|
|
// Method is not compiled: we don't need to deoptimize.
|
|
VLOG(jdwp) << "No need for deoptimization for non-compiled method "
|
|
<< ArtMethod::PrettyMethod(m);
|
|
return DeoptimizationRequest::kNothing;
|
|
}
|
|
}
|
|
} else {
|
|
// There is at least one breakpoint for this method: we don't need to deoptimize.
|
|
// Let's check that all breakpoints are configured the same way for deoptimization.
|
|
VLOG(jdwp) << "Breakpoint already set: no deoptimization is required";
|
|
DeoptimizationRequest::Kind deoptimization_kind = first_breakpoint->GetDeoptimizationKind();
|
|
if (kIsDebugBuild) {
|
|
ReaderMutexLock mu(self, *Locks::breakpoint_lock_);
|
|
SanityCheckExistingBreakpoints(m, deoptimization_kind);
|
|
}
|
|
return DeoptimizationRequest::kNothing;
|
|
}
|
|
}
|
|
|
|
// Installs a breakpoint at the specified location. Also indicates through the deoptimization
|
|
// request if we need to deoptimize.
|
|
void Dbg::WatchLocation(const JDWP::JdwpLocation* location, DeoptimizationRequest* req) {
|
|
Thread* const self = Thread::Current();
|
|
ArtMethod* m = FromMethodId(location->method_id);
|
|
DCHECK(m != nullptr) << "No method for method id " << location->method_id;
|
|
|
|
const Breakpoint* existing_breakpoint = nullptr;
|
|
const DeoptimizationRequest::Kind deoptimization_kind =
|
|
GetRequiredDeoptimizationKind(self, m, &existing_breakpoint);
|
|
req->SetKind(deoptimization_kind);
|
|
if (deoptimization_kind == DeoptimizationRequest::kSelectiveDeoptimization) {
|
|
req->SetMethod(m);
|
|
} else {
|
|
CHECK(deoptimization_kind == DeoptimizationRequest::kNothing ||
|
|
deoptimization_kind == DeoptimizationRequest::kFullDeoptimization);
|
|
req->SetMethod(nullptr);
|
|
}
|
|
|
|
{
|
|
WriterMutexLock mu(self, *Locks::breakpoint_lock_);
|
|
// If there is at least one existing breakpoint on the same method, the new breakpoint
|
|
// must have the same deoptimization kind than the existing breakpoint(s).
|
|
DeoptimizationRequest::Kind breakpoint_deoptimization_kind;
|
|
if (existing_breakpoint != nullptr) {
|
|
breakpoint_deoptimization_kind = existing_breakpoint->GetDeoptimizationKind();
|
|
} else {
|
|
breakpoint_deoptimization_kind = deoptimization_kind;
|
|
}
|
|
gBreakpoints.push_back(Breakpoint(m, location->dex_pc, breakpoint_deoptimization_kind));
|
|
VLOG(jdwp) << "Set breakpoint #" << (gBreakpoints.size() - 1) << ": "
|
|
<< gBreakpoints[gBreakpoints.size() - 1];
|
|
}
|
|
}
|
|
|
|
// Uninstalls a breakpoint at the specified location. Also indicates through the deoptimization
|
|
// request if we need to undeoptimize.
|
|
void Dbg::UnwatchLocation(const JDWP::JdwpLocation* location, DeoptimizationRequest* req) {
|
|
WriterMutexLock mu(Thread::Current(), *Locks::breakpoint_lock_);
|
|
ArtMethod* m = FromMethodId(location->method_id);
|
|
DCHECK(m != nullptr) << "No method for method id " << location->method_id;
|
|
DeoptimizationRequest::Kind deoptimization_kind = DeoptimizationRequest::kNothing;
|
|
for (size_t i = 0, e = gBreakpoints.size(); i < e; ++i) {
|
|
if (gBreakpoints[i].DexPc() == location->dex_pc && gBreakpoints[i].IsInMethod(m)) {
|
|
VLOG(jdwp) << "Removed breakpoint #" << i << ": " << gBreakpoints[i];
|
|
deoptimization_kind = gBreakpoints[i].GetDeoptimizationKind();
|
|
DCHECK_EQ(deoptimization_kind == DeoptimizationRequest::kSelectiveDeoptimization,
|
|
Runtime::Current()->GetInstrumentation()->IsDeoptimized(m));
|
|
gBreakpoints.erase(gBreakpoints.begin() + i);
|
|
break;
|
|
}
|
|
}
|
|
const Breakpoint* const existing_breakpoint = FindFirstBreakpointForMethod(m);
|
|
if (existing_breakpoint == nullptr) {
|
|
// There is no more breakpoint on this method: we need to undeoptimize.
|
|
if (deoptimization_kind == DeoptimizationRequest::kFullDeoptimization) {
|
|
// This method required full deoptimization: we need to undeoptimize everything.
|
|
req->SetKind(DeoptimizationRequest::kFullUndeoptimization);
|
|
req->SetMethod(nullptr);
|
|
} else if (deoptimization_kind == DeoptimizationRequest::kSelectiveDeoptimization) {
|
|
// This method required selective deoptimization: we need to undeoptimize only that method.
|
|
req->SetKind(DeoptimizationRequest::kSelectiveUndeoptimization);
|
|
req->SetMethod(m);
|
|
} else {
|
|
// This method had no need for deoptimization: do nothing.
|
|
CHECK_EQ(deoptimization_kind, DeoptimizationRequest::kNothing);
|
|
req->SetKind(DeoptimizationRequest::kNothing);
|
|
req->SetMethod(nullptr);
|
|
}
|
|
} else {
|
|
// There is at least one breakpoint for this method: we don't need to undeoptimize.
|
|
req->SetKind(DeoptimizationRequest::kNothing);
|
|
req->SetMethod(nullptr);
|
|
if (kIsDebugBuild) {
|
|
SanityCheckExistingBreakpoints(m, deoptimization_kind);
|
|
}
|
|
}
|
|
}
|
|
|
|
bool Dbg::IsForcedInterpreterNeededForCallingImpl(Thread* thread, ArtMethod* m) {
|
|
const SingleStepControl* const ssc = thread->GetSingleStepControl();
|
|
if (ssc == nullptr) {
|
|
// If we are not single-stepping, then we don't have to force interpreter.
|
|
return false;
|
|
}
|
|
if (Runtime::Current()->GetInstrumentation()->InterpretOnly()) {
|
|
// If we are in interpreter only mode, then we don't have to force interpreter.
|
|
return false;
|
|
}
|
|
|
|
if (!m->IsNative() && !m->IsProxyMethod()) {
|
|
// If we want to step into a method, then we have to force interpreter on that call.
|
|
if (ssc->GetStepDepth() == JDWP::SD_INTO) {
|
|
return true;
|
|
}
|
|
}
|
|
return false;
|
|
}
|
|
|
|
bool Dbg::IsForcedInterpreterNeededForResolutionImpl(Thread* thread, ArtMethod* m) {
|
|
instrumentation::Instrumentation* const instrumentation =
|
|
Runtime::Current()->GetInstrumentation();
|
|
// If we are in interpreter only mode, then we don't have to force interpreter.
|
|
if (instrumentation->InterpretOnly()) {
|
|
return false;
|
|
}
|
|
// We can only interpret pure Java method.
|
|
if (m->IsNative() || m->IsProxyMethod()) {
|
|
return false;
|
|
}
|
|
const SingleStepControl* const ssc = thread->GetSingleStepControl();
|
|
if (ssc != nullptr) {
|
|
// If we want to step into a method, then we have to force interpreter on that call.
|
|
if (ssc->GetStepDepth() == JDWP::SD_INTO) {
|
|
return true;
|
|
}
|
|
// If we are stepping out from a static initializer, by issuing a step
|
|
// in or step over, that was implicitly invoked by calling a static method,
|
|
// then we need to step into that method. Having a lower stack depth than
|
|
// the one the single step control has indicates that the step originates
|
|
// from the static initializer.
|
|
if (ssc->GetStepDepth() != JDWP::SD_OUT &&
|
|
ssc->GetStackDepth() > GetStackDepth(thread)) {
|
|
return true;
|
|
}
|
|
}
|
|
// There are cases where we have to force interpreter on deoptimized methods,
|
|
// because in some cases the call will not be performed by invoking an entry
|
|
// point that has been replaced by the deoptimization, but instead by directly
|
|
// invoking the compiled code of the method, for example.
|
|
return instrumentation->IsDeoptimized(m);
|
|
}
|
|
|
|
bool Dbg::IsForcedInstrumentationNeededForResolutionImpl(Thread* thread, ArtMethod* m) {
|
|
// The upcall can be null and in that case we don't need to do anything.
|
|
if (m == nullptr) {
|
|
return false;
|
|
}
|
|
instrumentation::Instrumentation* const instrumentation =
|
|
Runtime::Current()->GetInstrumentation();
|
|
// If we are in interpreter only mode, then we don't have to force interpreter.
|
|
if (instrumentation->InterpretOnly()) {
|
|
return false;
|
|
}
|
|
// We can only interpret pure Java method.
|
|
if (m->IsNative() || m->IsProxyMethod()) {
|
|
return false;
|
|
}
|
|
const SingleStepControl* const ssc = thread->GetSingleStepControl();
|
|
if (ssc != nullptr) {
|
|
// If we are stepping out from a static initializer, by issuing a step
|
|
// out, that was implicitly invoked by calling a static method, then we
|
|
// need to step into the caller of that method. Having a lower stack
|
|
// depth than the one the single step control has indicates that the
|
|
// step originates from the static initializer.
|
|
if (ssc->GetStepDepth() == JDWP::SD_OUT &&
|
|
ssc->GetStackDepth() > GetStackDepth(thread)) {
|
|
return true;
|
|
}
|
|
}
|
|
// If we are returning from a static intializer, that was implicitly
|
|
// invoked by calling a static method and the caller is deoptimized,
|
|
// then we have to deoptimize the stack without forcing interpreter
|
|
// on the static method that was called originally. This problem can
|
|
// be solved easily by forcing instrumentation on the called method,
|
|
// because the instrumentation exit hook will recognise the need of
|
|
// stack deoptimization by calling IsForcedInterpreterNeededForUpcall.
|
|
return instrumentation->IsDeoptimized(m);
|
|
}
|
|
|
|
bool Dbg::IsForcedInterpreterNeededForUpcallImpl(Thread* thread, ArtMethod* m) {
|
|
// The upcall can be null and in that case we don't need to do anything.
|
|
if (m == nullptr) {
|
|
return false;
|
|
}
|
|
instrumentation::Instrumentation* const instrumentation =
|
|
Runtime::Current()->GetInstrumentation();
|
|
// If we are in interpreter only mode, then we don't have to force interpreter.
|
|
if (instrumentation->InterpretOnly()) {
|
|
return false;
|
|
}
|
|
// We can only interpret pure Java method.
|
|
if (m->IsNative() || m->IsProxyMethod()) {
|
|
return false;
|
|
}
|
|
const SingleStepControl* const ssc = thread->GetSingleStepControl();
|
|
if (ssc != nullptr) {
|
|
// The debugger is not interested in what is happening under the level
|
|
// of the step, thus we only force interpreter when we are not below of
|
|
// the step.
|
|
if (ssc->GetStackDepth() >= GetStackDepth(thread)) {
|
|
return true;
|
|
}
|
|
}
|
|
if (thread->HasDebuggerShadowFrames()) {
|
|
// We need to deoptimize the stack for the exception handling flow so that
|
|
// we don't miss any deoptimization that should be done when there are
|
|
// debugger shadow frames.
|
|
return true;
|
|
}
|
|
// We have to require stack deoptimization if the upcall is deoptimized.
|
|
return instrumentation->IsDeoptimized(m);
|
|
}
|
|
|
|
class NeedsDeoptimizationVisitor : public StackVisitor {
|
|
public:
|
|
explicit NeedsDeoptimizationVisitor(Thread* self)
|
|
REQUIRES_SHARED(Locks::mutator_lock_)
|
|
: StackVisitor(self, nullptr, StackVisitor::StackWalkKind::kIncludeInlinedFrames),
|
|
needs_deoptimization_(false) {}
|
|
|
|
bool VisitFrame() OVERRIDE REQUIRES_SHARED(Locks::mutator_lock_) {
|
|
// The visitor is meant to be used when handling exception from compiled code only.
|
|
CHECK(!IsShadowFrame()) << "We only expect to visit compiled frame: "
|
|
<< ArtMethod::PrettyMethod(GetMethod());
|
|
ArtMethod* method = GetMethod();
|
|
if (method == nullptr) {
|
|
// We reach an upcall and don't need to deoptimize this part of the stack (ManagedFragment)
|
|
// so we can stop the visit.
|
|
DCHECK(!needs_deoptimization_);
|
|
return false;
|
|
}
|
|
if (Runtime::Current()->GetInstrumentation()->InterpretOnly()) {
|
|
// We found a compiled frame in the stack but instrumentation is set to interpret
|
|
// everything: we need to deoptimize.
|
|
needs_deoptimization_ = true;
|
|
return false;
|
|
}
|
|
if (Runtime::Current()->GetInstrumentation()->IsDeoptimized(method)) {
|
|
// We found a deoptimized method in the stack.
|
|
needs_deoptimization_ = true;
|
|
return false;
|
|
}
|
|
ShadowFrame* frame = GetThread()->FindDebuggerShadowFrame(GetFrameId());
|
|
if (frame != nullptr) {
|
|
// The debugger allocated a ShadowFrame to update a variable in the stack: we need to
|
|
// deoptimize the stack to execute (and deallocate) this frame.
|
|
needs_deoptimization_ = true;
|
|
return false;
|
|
}
|
|
return true;
|
|
}
|
|
|
|
bool NeedsDeoptimization() const {
|
|
return needs_deoptimization_;
|
|
}
|
|
|
|
private:
|
|
// Do we need to deoptimize the stack?
|
|
bool needs_deoptimization_;
|
|
|
|
DISALLOW_COPY_AND_ASSIGN(NeedsDeoptimizationVisitor);
|
|
};
|
|
|
|
// Do we need to deoptimize the stack to handle an exception?
|
|
bool Dbg::IsForcedInterpreterNeededForExceptionImpl(Thread* thread) {
|
|
const SingleStepControl* const ssc = thread->GetSingleStepControl();
|
|
if (ssc != nullptr) {
|
|
// We deopt to step into the catch handler.
|
|
return true;
|
|
}
|
|
// Deoptimization is required if at least one method in the stack needs it. However we
|
|
// skip frames that will be unwound (thus not executed).
|
|
NeedsDeoptimizationVisitor visitor(thread);
|
|
visitor.WalkStack(true); // includes upcall.
|
|
return visitor.NeedsDeoptimization();
|
|
}
|
|
|
|
// Scoped utility class to suspend a thread so that we may do tasks such as walk its stack. Doesn't
|
|
// cause suspension if the thread is the current thread.
|
|
class ScopedDebuggerThreadSuspension {
|
|
public:
|
|
ScopedDebuggerThreadSuspension(Thread* self, JDWP::ObjectId thread_id)
|
|
REQUIRES(!Locks::thread_list_lock_)
|
|
REQUIRES_SHARED(Locks::mutator_lock_) :
|
|
thread_(nullptr),
|
|
error_(JDWP::ERR_NONE),
|
|
self_suspend_(false),
|
|
other_suspend_(false) {
|
|
ScopedObjectAccessUnchecked soa(self);
|
|
thread_ = DecodeThread(soa, thread_id, &error_);
|
|
if (error_ == JDWP::ERR_NONE) {
|
|
if (thread_ == soa.Self()) {
|
|
self_suspend_ = true;
|
|
} else {
|
|
Thread* suspended_thread;
|
|
{
|
|
ScopedThreadSuspension sts(self, kWaitingForDebuggerSuspension);
|
|
jobject thread_peer = Dbg::GetObjectRegistry()->GetJObject(thread_id);
|
|
bool timed_out;
|
|
ThreadList* const thread_list = Runtime::Current()->GetThreadList();
|
|
suspended_thread = thread_list->SuspendThreadByPeer(thread_peer,
|
|
/* request_suspension */ true,
|
|
SuspendReason::kForDebugger,
|
|
&timed_out);
|
|
}
|
|
if (suspended_thread == nullptr) {
|
|
// Thread terminated from under us while suspending.
|
|
error_ = JDWP::ERR_INVALID_THREAD;
|
|
} else {
|
|
CHECK_EQ(suspended_thread, thread_);
|
|
other_suspend_ = true;
|
|
}
|
|
}
|
|
}
|
|
}
|
|
|
|
Thread* GetThread() const {
|
|
return thread_;
|
|
}
|
|
|
|
JDWP::JdwpError GetError() const {
|
|
return error_;
|
|
}
|
|
|
|
~ScopedDebuggerThreadSuspension() {
|
|
if (other_suspend_) {
|
|
bool resumed = Runtime::Current()->GetThreadList()->Resume(thread_,
|
|
SuspendReason::kForDebugger);
|
|
DCHECK(resumed);
|
|
}
|
|
}
|
|
|
|
private:
|
|
Thread* thread_;
|
|
JDWP::JdwpError error_;
|
|
bool self_suspend_;
|
|
bool other_suspend_;
|
|
};
|
|
|
|
JDWP::JdwpError Dbg::ConfigureStep(JDWP::ObjectId thread_id, JDWP::JdwpStepSize step_size,
|
|
JDWP::JdwpStepDepth step_depth) {
|
|
Thread* self = Thread::Current();
|
|
ScopedDebuggerThreadSuspension sts(self, thread_id);
|
|
if (sts.GetError() != JDWP::ERR_NONE) {
|
|
return sts.GetError();
|
|
}
|
|
|
|
// Work out what ArtMethod* we're in, the current line number, and how deep the stack currently
|
|
// is for step-out.
|
|
struct SingleStepStackVisitor : public StackVisitor {
|
|
explicit SingleStepStackVisitor(Thread* thread) REQUIRES_SHARED(Locks::mutator_lock_)
|
|
: StackVisitor(thread, nullptr, StackVisitor::StackWalkKind::kIncludeInlinedFrames),
|
|
stack_depth(0),
|
|
method(nullptr),
|
|
line_number(-1) {}
|
|
|
|
// TODO: Enable annotalysis. We know lock is held in constructor, but abstraction confuses
|
|
// annotalysis.
|
|
bool VisitFrame() NO_THREAD_SAFETY_ANALYSIS {
|
|
ArtMethod* m = GetMethod();
|
|
if (!m->IsRuntimeMethod()) {
|
|
++stack_depth;
|
|
if (method == nullptr) {
|
|
const DexFile* dex_file = m->GetDexFile();
|
|
method = m;
|
|
if (dex_file != nullptr) {
|
|
line_number = annotations::GetLineNumFromPC(dex_file, m, GetDexPc());
|
|
}
|
|
}
|
|
}
|
|
return true;
|
|
}
|
|
|
|
int stack_depth;
|
|
ArtMethod* method;
|
|
int32_t line_number;
|
|
};
|
|
|
|
Thread* const thread = sts.GetThread();
|
|
SingleStepStackVisitor visitor(thread);
|
|
visitor.WalkStack();
|
|
|
|
// Find the dex_pc values that correspond to the current line, for line-based single-stepping.
|
|
struct DebugCallbackContext {
|
|
DebugCallbackContext(SingleStepControl* single_step_control_cb,
|
|
int32_t line_number_cb, const DexFile::CodeItem* code_item)
|
|
: single_step_control_(single_step_control_cb), line_number_(line_number_cb),
|
|
code_item_(code_item), last_pc_valid(false), last_pc(0) {
|
|
}
|
|
|
|
static bool Callback(void* raw_context, const DexFile::PositionInfo& entry) {
|
|
DebugCallbackContext* context = reinterpret_cast<DebugCallbackContext*>(raw_context);
|
|
if (static_cast<int32_t>(entry.line_) == context->line_number_) {
|
|
if (!context->last_pc_valid) {
|
|
// Everything from this address until the next line change is ours.
|
|
context->last_pc = entry.address_;
|
|
context->last_pc_valid = true;
|
|
}
|
|
// Otherwise, if we're already in a valid range for this line,
|
|
// just keep going (shouldn't really happen)...
|
|
} else if (context->last_pc_valid) { // and the line number is new
|
|
// Add everything from the last entry up until here to the set
|
|
for (uint32_t dex_pc = context->last_pc; dex_pc < entry.address_; ++dex_pc) {
|
|
context->single_step_control_->AddDexPc(dex_pc);
|
|
}
|
|
context->last_pc_valid = false;
|
|
}
|
|
return false; // There may be multiple entries for any given line.
|
|
}
|
|
|
|
~DebugCallbackContext() {
|
|
// If the line number was the last in the position table...
|
|
if (last_pc_valid) {
|
|
size_t end = code_item_->insns_size_in_code_units_;
|
|
for (uint32_t dex_pc = last_pc; dex_pc < end; ++dex_pc) {
|
|
single_step_control_->AddDexPc(dex_pc);
|
|
}
|
|
}
|
|
}
|
|
|
|
SingleStepControl* const single_step_control_;
|
|
const int32_t line_number_;
|
|
const DexFile::CodeItem* const code_item_;
|
|
bool last_pc_valid;
|
|
uint32_t last_pc;
|
|
};
|
|
|
|
// Allocate single step.
|
|
SingleStepControl* single_step_control =
|
|
new (std::nothrow) SingleStepControl(step_size, step_depth,
|
|
visitor.stack_depth, visitor.method);
|
|
if (single_step_control == nullptr) {
|
|
LOG(ERROR) << "Failed to allocate SingleStepControl";
|
|
return JDWP::ERR_OUT_OF_MEMORY;
|
|
}
|
|
|
|
ArtMethod* m = single_step_control->GetMethod();
|
|
const int32_t line_number = visitor.line_number;
|
|
// Note: if the thread is not running Java code (pure native thread), there is no "current"
|
|
// method on the stack (and no line number either).
|
|
if (m != nullptr && !m->IsNative()) {
|
|
const DexFile::CodeItem* const code_item = m->GetCodeItem();
|
|
DebugCallbackContext context(single_step_control, line_number, code_item);
|
|
m->GetDexFile()->DecodeDebugPositionInfo(code_item, DebugCallbackContext::Callback, &context);
|
|
}
|
|
|
|
// Activate single-step in the thread.
|
|
thread->ActivateSingleStepControl(single_step_control);
|
|
|
|
if (VLOG_IS_ON(jdwp)) {
|
|
VLOG(jdwp) << "Single-step thread: " << *thread;
|
|
VLOG(jdwp) << "Single-step step size: " << single_step_control->GetStepSize();
|
|
VLOG(jdwp) << "Single-step step depth: " << single_step_control->GetStepDepth();
|
|
VLOG(jdwp) << "Single-step current method: "
|
|
<< ArtMethod::PrettyMethod(single_step_control->GetMethod());
|
|
VLOG(jdwp) << "Single-step current line: " << line_number;
|
|
VLOG(jdwp) << "Single-step current stack depth: " << single_step_control->GetStackDepth();
|
|
VLOG(jdwp) << "Single-step dex_pc values:";
|
|
for (uint32_t dex_pc : single_step_control->GetDexPcs()) {
|
|
VLOG(jdwp) << StringPrintf(" %#x", dex_pc);
|
|
}
|
|
}
|
|
|
|
return JDWP::ERR_NONE;
|
|
}
|
|
|
|
void Dbg::UnconfigureStep(JDWP::ObjectId thread_id) {
|
|
ScopedObjectAccessUnchecked soa(Thread::Current());
|
|
JDWP::JdwpError error;
|
|
Thread* thread = DecodeThread(soa, thread_id, &error);
|
|
if (error == JDWP::ERR_NONE) {
|
|
thread->DeactivateSingleStepControl();
|
|
}
|
|
}
|
|
|
|
static char JdwpTagToShortyChar(JDWP::JdwpTag tag) {
|
|
switch (tag) {
|
|
default:
|
|
LOG(FATAL) << "unknown JDWP tag: " << PrintableChar(tag);
|
|
UNREACHABLE();
|
|
|
|
// Primitives.
|
|
case JDWP::JT_BYTE: return 'B';
|
|
case JDWP::JT_CHAR: return 'C';
|
|
case JDWP::JT_FLOAT: return 'F';
|
|
case JDWP::JT_DOUBLE: return 'D';
|
|
case JDWP::JT_INT: return 'I';
|
|
case JDWP::JT_LONG: return 'J';
|
|
case JDWP::JT_SHORT: return 'S';
|
|
case JDWP::JT_VOID: return 'V';
|
|
case JDWP::JT_BOOLEAN: return 'Z';
|
|
|
|
// Reference types.
|
|
case JDWP::JT_ARRAY:
|
|
case JDWP::JT_OBJECT:
|
|
case JDWP::JT_STRING:
|
|
case JDWP::JT_THREAD:
|
|
case JDWP::JT_THREAD_GROUP:
|
|
case JDWP::JT_CLASS_LOADER:
|
|
case JDWP::JT_CLASS_OBJECT:
|
|
return 'L';
|
|
}
|
|
}
|
|
|
|
JDWP::JdwpError Dbg::PrepareInvokeMethod(uint32_t request_id, JDWP::ObjectId thread_id,
|
|
JDWP::ObjectId object_id, JDWP::RefTypeId class_id,
|
|
JDWP::MethodId method_id, uint32_t arg_count,
|
|
uint64_t arg_values[], JDWP::JdwpTag* arg_types,
|
|
uint32_t options) {
|
|
Thread* const self = Thread::Current();
|
|
CHECK_EQ(self, GetDebugThread()) << "This must be called by the JDWP thread";
|
|
const bool resume_all_threads = ((options & JDWP::INVOKE_SINGLE_THREADED) == 0);
|
|
|
|
ThreadList* thread_list = Runtime::Current()->GetThreadList();
|
|
Thread* targetThread = nullptr;
|
|
{
|
|
ScopedObjectAccessUnchecked soa(self);
|
|
JDWP::JdwpError error;
|
|
targetThread = DecodeThread(soa, thread_id, &error);
|
|
if (error != JDWP::ERR_NONE) {
|
|
LOG(ERROR) << "InvokeMethod request for invalid thread id " << thread_id;
|
|
return error;
|
|
}
|
|
if (targetThread->GetInvokeReq() != nullptr) {
|
|
// Thread is already invoking a method on behalf of the debugger.
|
|
LOG(ERROR) << "InvokeMethod request for thread already invoking a method: " << *targetThread;
|
|
return JDWP::ERR_ALREADY_INVOKING;
|
|
}
|
|
if (!targetThread->IsReadyForDebugInvoke()) {
|
|
// Thread is not suspended by an event so it cannot invoke a method.
|
|
LOG(ERROR) << "InvokeMethod request for thread not stopped by event: " << *targetThread;
|
|
return JDWP::ERR_INVALID_THREAD;
|
|
}
|
|
|
|
/*
|
|
* According to the JDWP specs, we are expected to resume all threads (or only the
|
|
* target thread) once. So if a thread has been suspended more than once (either by
|
|
* the debugger for an event or by the runtime for GC), it will remain suspended before
|
|
* the invoke is executed. This means the debugger is responsible to properly resume all
|
|
* the threads it has suspended so the target thread can execute the method.
|
|
*
|
|
* However, for compatibility reason with older versions of debuggers (like Eclipse), we
|
|
* fully resume all threads (by canceling *all* debugger suspensions) when the debugger
|
|
* wants us to resume all threads. This is to avoid ending up in deadlock situation.
|
|
*
|
|
* On the other hand, if we are asked to only resume the target thread, then we follow the
|
|
* JDWP specs by resuming that thread only once. This means the thread will remain suspended
|
|
* if it has been suspended more than once before the invoke (and again, this is the
|
|
* responsibility of the debugger to properly resume that thread before invoking a method).
|
|
*/
|
|
int suspend_count;
|
|
{
|
|
MutexLock mu2(soa.Self(), *Locks::thread_suspend_count_lock_);
|
|
suspend_count = targetThread->GetSuspendCount();
|
|
}
|
|
if (suspend_count > 1 && resume_all_threads) {
|
|
// The target thread will remain suspended even after we resume it. Let's emit a warning
|
|
// to indicate the invoke won't be executed until the thread is resumed.
|
|
LOG(WARNING) << *targetThread << " suspended more than once (suspend count == "
|
|
<< suspend_count << "). This thread will invoke the method only once "
|
|
<< "it is fully resumed.";
|
|
}
|
|
|
|
mirror::Object* receiver = gRegistry->Get<mirror::Object*>(object_id, &error);
|
|
if (error != JDWP::ERR_NONE) {
|
|
return JDWP::ERR_INVALID_OBJECT;
|
|
}
|
|
|
|
gRegistry->Get<mirror::Object*>(thread_id, &error);
|
|
if (error != JDWP::ERR_NONE) {
|
|
return JDWP::ERR_INVALID_OBJECT;
|
|
}
|
|
|
|
mirror::Class* c = DecodeClass(class_id, &error);
|
|
if (c == nullptr) {
|
|
return error;
|
|
}
|
|
|
|
ArtMethod* m = FromMethodId(method_id);
|
|
if (m->IsStatic() != (receiver == nullptr)) {
|
|
return JDWP::ERR_INVALID_METHODID;
|
|
}
|
|
if (m->IsStatic()) {
|
|
if (m->GetDeclaringClass() != c) {
|
|
return JDWP::ERR_INVALID_METHODID;
|
|
}
|
|
} else {
|
|
if (!m->GetDeclaringClass()->IsAssignableFrom(c)) {
|
|
return JDWP::ERR_INVALID_METHODID;
|
|
}
|
|
}
|
|
|
|
// Check the argument list matches the method.
|
|
uint32_t shorty_len = 0;
|
|
const char* shorty = m->GetShorty(&shorty_len);
|
|
if (shorty_len - 1 != arg_count) {
|
|
return JDWP::ERR_ILLEGAL_ARGUMENT;
|
|
}
|
|
|
|
{
|
|
StackHandleScope<2> hs(soa.Self());
|
|
HandleWrapper<mirror::Object> h_obj(hs.NewHandleWrapper(&receiver));
|
|
HandleWrapper<mirror::Class> h_klass(hs.NewHandleWrapper(&c));
|
|
const DexFile::TypeList* types = m->GetParameterTypeList();
|
|
for (size_t i = 0; i < arg_count; ++i) {
|
|
if (shorty[i + 1] != JdwpTagToShortyChar(arg_types[i])) {
|
|
return JDWP::ERR_ILLEGAL_ARGUMENT;
|
|
}
|
|
|
|
if (shorty[i + 1] == 'L') {
|
|
// Did we really get an argument of an appropriate reference type?
|
|
mirror::Class* parameter_type =
|
|
m->GetClassFromTypeIndex(types->GetTypeItem(i).type_idx_, true /* resolve */);
|
|
mirror::Object* argument = gRegistry->Get<mirror::Object*>(arg_values[i], &error);
|
|
if (error != JDWP::ERR_NONE) {
|
|
return JDWP::ERR_INVALID_OBJECT;
|
|
}
|
|
if (argument != nullptr && !argument->InstanceOf(parameter_type)) {
|
|
return JDWP::ERR_ILLEGAL_ARGUMENT;
|
|
}
|
|
|
|
// Turn the on-the-wire ObjectId into a jobject.
|
|
jvalue& v = reinterpret_cast<jvalue&>(arg_values[i]);
|
|
v.l = gRegistry->GetJObject(arg_values[i]);
|
|
}
|
|
}
|
|
}
|
|
|
|
// Allocates a DebugInvokeReq.
|
|
DebugInvokeReq* req = new (std::nothrow) DebugInvokeReq(request_id, thread_id, receiver, c, m,
|
|
options, arg_values, arg_count);
|
|
if (req == nullptr) {
|
|
LOG(ERROR) << "Failed to allocate DebugInvokeReq";
|
|
return JDWP::ERR_OUT_OF_MEMORY;
|
|
}
|
|
|
|
// Attaches the DebugInvokeReq to the target thread so it executes the method when
|
|
// it is resumed. Once the invocation completes, the target thread will delete it before
|
|
// suspending itself (see ThreadList::SuspendSelfForDebugger).
|
|
targetThread->SetDebugInvokeReq(req);
|
|
}
|
|
|
|
// The fact that we've released the thread list lock is a bit risky --- if the thread goes
|
|
// away we're sitting high and dry -- but we must release this before the UndoDebuggerSuspensions
|
|
// call.
|
|
if (resume_all_threads) {
|
|
VLOG(jdwp) << " Resuming all threads";
|
|
thread_list->UndoDebuggerSuspensions();
|
|
} else {
|
|
VLOG(jdwp) << " Resuming event thread only";
|
|
bool resumed = thread_list->Resume(targetThread, SuspendReason::kForDebugger);
|
|
DCHECK(resumed);
|
|
}
|
|
|
|
return JDWP::ERR_NONE;
|
|
}
|
|
|
|
void Dbg::ExecuteMethod(DebugInvokeReq* pReq) {
|
|
Thread* const self = Thread::Current();
|
|
CHECK_NE(self, GetDebugThread()) << "This must be called by the event thread";
|
|
|
|
ScopedObjectAccess soa(self);
|
|
|
|
// We can be called while an exception is pending. We need
|
|
// to preserve that across the method invocation.
|
|
StackHandleScope<1> hs(soa.Self());
|
|
Handle<mirror::Throwable> old_exception = hs.NewHandle(soa.Self()->GetException());
|
|
soa.Self()->ClearException();
|
|
|
|
// Execute the method then sends reply to the debugger.
|
|
ExecuteMethodWithoutPendingException(soa, pReq);
|
|
|
|
// If an exception was pending before the invoke, restore it now.
|
|
if (old_exception != nullptr) {
|
|
soa.Self()->SetException(old_exception.Get());
|
|
}
|
|
}
|
|
|
|
// Helper function: write a variable-width value into the output input buffer.
|
|
static void WriteValue(JDWP::ExpandBuf* pReply, int width, uint64_t value) {
|
|
switch (width) {
|
|
case 1:
|
|
expandBufAdd1(pReply, value);
|
|
break;
|
|
case 2:
|
|
expandBufAdd2BE(pReply, value);
|
|
break;
|
|
case 4:
|
|
expandBufAdd4BE(pReply, value);
|
|
break;
|
|
case 8:
|
|
expandBufAdd8BE(pReply, value);
|
|
break;
|
|
default:
|
|
LOG(FATAL) << width;
|
|
UNREACHABLE();
|
|
}
|
|
}
|
|
|
|
void Dbg::ExecuteMethodWithoutPendingException(ScopedObjectAccess& soa, DebugInvokeReq* pReq) {
|
|
soa.Self()->AssertNoPendingException();
|
|
|
|
// Translate the method through the vtable, unless the debugger wants to suppress it.
|
|
ArtMethod* m = pReq->method;
|
|
PointerSize image_pointer_size = Runtime::Current()->GetClassLinker()->GetImagePointerSize();
|
|
if ((pReq->options & JDWP::INVOKE_NONVIRTUAL) == 0 && pReq->receiver.Read() != nullptr) {
|
|
ArtMethod* actual_method =
|
|
pReq->klass.Read()->FindVirtualMethodForVirtualOrInterface(m, image_pointer_size);
|
|
if (actual_method != m) {
|
|
VLOG(jdwp) << "ExecuteMethod translated " << ArtMethod::PrettyMethod(m)
|
|
<< " to " << ArtMethod::PrettyMethod(actual_method);
|
|
m = actual_method;
|
|
}
|
|
}
|
|
VLOG(jdwp) << "ExecuteMethod " << ArtMethod::PrettyMethod(m)
|
|
<< " receiver=" << pReq->receiver.Read()
|
|
<< " arg_count=" << pReq->arg_count;
|
|
CHECK(m != nullptr);
|
|
|
|
static_assert(sizeof(jvalue) == sizeof(uint64_t), "jvalue and uint64_t have different sizes.");
|
|
|
|
// Invoke the method.
|
|
ScopedLocalRef<jobject> ref(soa.Env(), soa.AddLocalReference<jobject>(pReq->receiver.Read()));
|
|
JValue result = InvokeWithJValues(soa, ref.get(), jni::EncodeArtMethod(m),
|
|
reinterpret_cast<jvalue*>(pReq->arg_values.get()));
|
|
|
|
// Prepare JDWP ids for the reply.
|
|
JDWP::JdwpTag result_tag = BasicTagFromDescriptor(m->GetShorty());
|
|
const bool is_object_result = (result_tag == JDWP::JT_OBJECT);
|
|
StackHandleScope<3> hs(soa.Self());
|
|
Handle<mirror::Object> object_result = hs.NewHandle(is_object_result ? result.GetL() : nullptr);
|
|
Handle<mirror::Throwable> exception = hs.NewHandle(soa.Self()->GetException());
|
|
soa.Self()->ClearException();
|
|
|
|
if (!IsDebuggerActive()) {
|
|
// The debugger detached: we must not re-suspend threads. We also don't need to fill the reply
|
|
// because it won't be sent either.
|
|
return;
|
|
}
|
|
|
|
JDWP::ObjectId exceptionObjectId = gRegistry->Add(exception);
|
|
uint64_t result_value = 0;
|
|
if (exceptionObjectId != 0) {
|
|
VLOG(jdwp) << " JDWP invocation returning with exception=" << exception.Get()
|
|
<< " " << exception->Dump();
|
|
result_value = 0;
|
|
} else if (is_object_result) {
|
|
/* if no exception was thrown, examine object result more closely */
|
|
JDWP::JdwpTag new_tag = TagFromObject(soa, object_result.Get());
|
|
if (new_tag != result_tag) {
|
|
VLOG(jdwp) << " JDWP promoted result from " << result_tag << " to " << new_tag;
|
|
result_tag = new_tag;
|
|
}
|
|
|
|
// Register the object in the registry and reference its ObjectId. This ensures
|
|
// GC safety and prevents from accessing stale reference if the object is moved.
|
|
result_value = gRegistry->Add(object_result.Get());
|
|
} else {
|
|
// Primitive result.
|
|
DCHECK(IsPrimitiveTag(result_tag));
|
|
result_value = result.GetJ();
|
|
}
|
|
const bool is_constructor = m->IsConstructor() && !m->IsStatic();
|
|
if (is_constructor) {
|
|
// If we invoked a constructor (which actually returns void), return the receiver,
|
|
// unless we threw, in which case we return null.
|
|
DCHECK_EQ(JDWP::JT_VOID, result_tag);
|
|
if (exceptionObjectId == 0) {
|
|
if (m->GetDeclaringClass()->IsStringClass()) {
|
|
// For string constructors, the new string is remapped to the receiver (stored in ref).
|
|
Handle<mirror::Object> decoded_ref = hs.NewHandle(soa.Self()->DecodeJObject(ref.get()));
|
|
result_value = gRegistry->Add(decoded_ref);
|
|
result_tag = TagFromObject(soa, decoded_ref.Get());
|
|
} else {
|
|
// TODO we could keep the receiver ObjectId in the DebugInvokeReq to avoid looking into the
|
|
// object registry.
|
|
result_value = GetObjectRegistry()->Add(pReq->receiver.Read());
|
|
result_tag = TagFromObject(soa, pReq->receiver.Read());
|
|
}
|
|
} else {
|
|
result_value = 0;
|
|
result_tag = JDWP::JT_OBJECT;
|
|
}
|
|
}
|
|
|
|
// Suspend other threads if the invoke is not single-threaded.
|
|
if ((pReq->options & JDWP::INVOKE_SINGLE_THREADED) == 0) {
|
|
ScopedThreadSuspension sts(soa.Self(), kWaitingForDebuggerSuspension);
|
|
// Avoid a deadlock between GC and debugger where GC gets suspended during GC. b/25800335.
|
|
gc::ScopedGCCriticalSection gcs(soa.Self(), gc::kGcCauseDebugger, gc::kCollectorTypeDebugger);
|
|
VLOG(jdwp) << " Suspending all threads";
|
|
Runtime::Current()->GetThreadList()->SuspendAllForDebugger();
|
|
}
|
|
|
|
VLOG(jdwp) << " --> returned " << result_tag
|
|
<< StringPrintf(" %#" PRIx64 " (except=%#" PRIx64 ")", result_value,
|
|
exceptionObjectId);
|
|
|
|
// Show detailed debug output.
|
|
if (result_tag == JDWP::JT_STRING && exceptionObjectId == 0) {
|
|
if (result_value != 0) {
|
|
if (VLOG_IS_ON(jdwp)) {
|
|
std::string result_string;
|
|
JDWP::JdwpError error = Dbg::StringToUtf8(result_value, &result_string);
|
|
CHECK_EQ(error, JDWP::ERR_NONE);
|
|
VLOG(jdwp) << " string '" << result_string << "'";
|
|
}
|
|
} else {
|
|
VLOG(jdwp) << " string (null)";
|
|
}
|
|
}
|
|
|
|
// Attach the reply to DebugInvokeReq so it can be sent to the debugger when the event thread
|
|
// is ready to suspend.
|
|
BuildInvokeReply(pReq->reply, pReq->request_id, result_tag, result_value, exceptionObjectId);
|
|
}
|
|
|
|
void Dbg::BuildInvokeReply(JDWP::ExpandBuf* pReply, uint32_t request_id, JDWP::JdwpTag result_tag,
|
|
uint64_t result_value, JDWP::ObjectId exception) {
|
|
// Make room for the JDWP header since we do not know the size of the reply yet.
|
|
JDWP::expandBufAddSpace(pReply, kJDWPHeaderLen);
|
|
|
|
size_t width = GetTagWidth(result_tag);
|
|
JDWP::expandBufAdd1(pReply, result_tag);
|
|
if (width != 0) {
|
|
WriteValue(pReply, width, result_value);
|
|
}
|
|
JDWP::expandBufAdd1(pReply, JDWP::JT_OBJECT);
|
|
JDWP::expandBufAddObjectId(pReply, exception);
|
|
|
|
// Now we know the size, we can complete the JDWP header.
|
|
uint8_t* buf = expandBufGetBuffer(pReply);
|
|
JDWP::Set4BE(buf + kJDWPHeaderSizeOffset, expandBufGetLength(pReply));
|
|
JDWP::Set4BE(buf + kJDWPHeaderIdOffset, request_id);
|
|
JDWP::Set1(buf + kJDWPHeaderFlagsOffset, kJDWPFlagReply); // flags
|
|
JDWP::Set2BE(buf + kJDWPHeaderErrorCodeOffset, JDWP::ERR_NONE);
|
|
}
|
|
|
|
void Dbg::FinishInvokeMethod(DebugInvokeReq* pReq) {
|
|
CHECK_NE(Thread::Current(), GetDebugThread()) << "This must be called by the event thread";
|
|
|
|
JDWP::ExpandBuf* const pReply = pReq->reply;
|
|
CHECK(pReply != nullptr) << "No reply attached to DebugInvokeReq";
|
|
|
|
// We need to prevent other threads (including JDWP thread) from interacting with the debugger
|
|
// while we send the reply but are not yet suspended. The JDWP token will be released just before
|
|
// we suspend ourself again (see ThreadList::SuspendSelfForDebugger).
|
|
gJdwpState->AcquireJdwpTokenForEvent(pReq->thread_id);
|
|
|
|
// Send the reply unless the debugger detached before the completion of the method.
|
|
if (IsDebuggerActive()) {
|
|
const size_t replyDataLength = expandBufGetLength(pReply) - kJDWPHeaderLen;
|
|
VLOG(jdwp) << StringPrintf("REPLY INVOKE id=0x%06x (length=%zu)",
|
|
pReq->request_id, replyDataLength);
|
|
|
|
gJdwpState->SendRequest(pReply);
|
|
} else {
|
|
VLOG(jdwp) << "Not sending invoke reply because debugger detached";
|
|
}
|
|
}
|
|
|
|
/*
|
|
* "request" contains a full JDWP packet, possibly with multiple chunks. We
|
|
* need to process each, accumulate the replies, and ship the whole thing
|
|
* back.
|
|
*
|
|
* Returns "true" if we have a reply. The reply buffer is newly allocated,
|
|
* and includes the chunk type/length, followed by the data.
|
|
*
|
|
* OLD-TODO: we currently assume that the request and reply include a single
|
|
* chunk. If this becomes inconvenient we will need to adapt.
|
|
*/
|
|
bool Dbg::DdmHandlePacket(JDWP::Request* request, uint8_t** pReplyBuf, int* pReplyLen) {
|
|
Thread* self = Thread::Current();
|
|
JNIEnv* env = self->GetJniEnv();
|
|
|
|
uint32_t type = request->ReadUnsigned32("type");
|
|
uint32_t length = request->ReadUnsigned32("length");
|
|
|
|
// Create a byte[] corresponding to 'request'.
|
|
size_t request_length = request->size();
|
|
ScopedLocalRef<jbyteArray> dataArray(env, env->NewByteArray(request_length));
|
|
if (dataArray.get() == nullptr) {
|
|
LOG(WARNING) << "byte[] allocation failed: " << request_length;
|
|
env->ExceptionClear();
|
|
return false;
|
|
}
|
|
env->SetByteArrayRegion(dataArray.get(), 0, request_length,
|
|
reinterpret_cast<const jbyte*>(request->data()));
|
|
request->Skip(request_length);
|
|
|
|
// Run through and find all chunks. [Currently just find the first.]
|
|
ScopedByteArrayRO contents(env, dataArray.get());
|
|
if (length != request_length) {
|
|
LOG(WARNING) << StringPrintf("bad chunk found (len=%u pktLen=%zd)", length, request_length);
|
|
return false;
|
|
}
|
|
|
|
// Call "private static Chunk dispatch(int type, byte[] data, int offset, int length)".
|
|
ScopedLocalRef<jobject> chunk(env, env->CallStaticObjectMethod(WellKnownClasses::org_apache_harmony_dalvik_ddmc_DdmServer,
|
|
WellKnownClasses::org_apache_harmony_dalvik_ddmc_DdmServer_dispatch,
|
|
type, dataArray.get(), 0, length));
|
|
if (env->ExceptionCheck()) {
|
|
LOG(INFO) << StringPrintf("Exception thrown by dispatcher for 0x%08x", type);
|
|
env->ExceptionDescribe();
|
|
env->ExceptionClear();
|
|
return false;
|
|
}
|
|
|
|
if (chunk.get() == nullptr) {
|
|
return false;
|
|
}
|
|
|
|
/*
|
|
* Pull the pieces out of the chunk. We copy the results into a
|
|
* newly-allocated buffer that the caller can free. We don't want to
|
|
* continue using the Chunk object because nothing has a reference to it.
|
|
*
|
|
* We could avoid this by returning type/data/offset/length and having
|
|
* the caller be aware of the object lifetime issues, but that
|
|
* integrates the JDWP code more tightly into the rest of the runtime, and doesn't work
|
|
* if we have responses for multiple chunks.
|
|
*
|
|
* So we're pretty much stuck with copying data around multiple times.
|
|
*/
|
|
ScopedLocalRef<jbyteArray> replyData(env, reinterpret_cast<jbyteArray>(env->GetObjectField(chunk.get(), WellKnownClasses::org_apache_harmony_dalvik_ddmc_Chunk_data)));
|
|
jint offset = env->GetIntField(chunk.get(), WellKnownClasses::org_apache_harmony_dalvik_ddmc_Chunk_offset);
|
|
length = env->GetIntField(chunk.get(), WellKnownClasses::org_apache_harmony_dalvik_ddmc_Chunk_length);
|
|
type = env->GetIntField(chunk.get(), WellKnownClasses::org_apache_harmony_dalvik_ddmc_Chunk_type);
|
|
|
|
VLOG(jdwp) << StringPrintf("DDM reply: type=0x%08x data=%p offset=%d length=%d", type, replyData.get(), offset, length);
|
|
if (length == 0 || replyData.get() == nullptr) {
|
|
return false;
|
|
}
|
|
|
|
const int kChunkHdrLen = 8;
|
|
uint8_t* reply = new uint8_t[length + kChunkHdrLen];
|
|
if (reply == nullptr) {
|
|
LOG(WARNING) << "malloc failed: " << (length + kChunkHdrLen);
|
|
return false;
|
|
}
|
|
JDWP::Set4BE(reply + 0, type);
|
|
JDWP::Set4BE(reply + 4, length);
|
|
env->GetByteArrayRegion(replyData.get(), offset, length, reinterpret_cast<jbyte*>(reply + kChunkHdrLen));
|
|
|
|
*pReplyBuf = reply;
|
|
*pReplyLen = length + kChunkHdrLen;
|
|
|
|
VLOG(jdwp) << StringPrintf("dvmHandleDdm returning type=%.4s %p len=%d", reinterpret_cast<char*>(reply), reply, length);
|
|
return true;
|
|
}
|
|
|
|
void Dbg::DdmBroadcast(bool connect) {
|
|
VLOG(jdwp) << "Broadcasting DDM " << (connect ? "connect" : "disconnect") << "...";
|
|
|
|
Thread* self = Thread::Current();
|
|
if (self->GetState() != kRunnable) {
|
|
LOG(ERROR) << "DDM broadcast in thread state " << self->GetState();
|
|
/* try anyway? */
|
|
}
|
|
|
|
JNIEnv* env = self->GetJniEnv();
|
|
jint event = connect ? 1 /*DdmServer.CONNECTED*/ : 2 /*DdmServer.DISCONNECTED*/;
|
|
env->CallStaticVoidMethod(WellKnownClasses::org_apache_harmony_dalvik_ddmc_DdmServer,
|
|
WellKnownClasses::org_apache_harmony_dalvik_ddmc_DdmServer_broadcast,
|
|
event);
|
|
if (env->ExceptionCheck()) {
|
|
LOG(ERROR) << "DdmServer.broadcast " << event << " failed";
|
|
env->ExceptionDescribe();
|
|
env->ExceptionClear();
|
|
}
|
|
}
|
|
|
|
void Dbg::DdmConnected() {
|
|
Dbg::DdmBroadcast(true);
|
|
}
|
|
|
|
void Dbg::DdmDisconnected() {
|
|
Dbg::DdmBroadcast(false);
|
|
gDdmThreadNotification = false;
|
|
}
|
|
|
|
/*
|
|
* Send a notification when a thread starts, stops, or changes its name.
|
|
*
|
|
* Because we broadcast the full set of threads when the notifications are
|
|
* first enabled, it's possible for "thread" to be actively executing.
|
|
*/
|
|
void Dbg::DdmSendThreadNotification(Thread* t, uint32_t type) {
|
|
if (!gDdmThreadNotification) {
|
|
return;
|
|
}
|
|
|
|
if (type == CHUNK_TYPE("THDE")) {
|
|
uint8_t buf[4];
|
|
JDWP::Set4BE(&buf[0], t->GetThreadId());
|
|
Dbg::DdmSendChunk(CHUNK_TYPE("THDE"), 4, buf);
|
|
} else {
|
|
CHECK(type == CHUNK_TYPE("THCR") || type == CHUNK_TYPE("THNM")) << type;
|
|
ScopedObjectAccessUnchecked soa(Thread::Current());
|
|
StackHandleScope<1> hs(soa.Self());
|
|
Handle<mirror::String> name(hs.NewHandle(t->GetThreadName()));
|
|
size_t char_count = (name != nullptr) ? name->GetLength() : 0;
|
|
const jchar* chars = (name != nullptr) ? name->GetValue() : nullptr;
|
|
bool is_compressed = (name != nullptr) ? name->IsCompressed() : false;
|
|
|
|
std::vector<uint8_t> bytes;
|
|
JDWP::Append4BE(bytes, t->GetThreadId());
|
|
if (is_compressed) {
|
|
const uint8_t* chars_compressed = name->GetValueCompressed();
|
|
JDWP::AppendUtf16CompressedBE(bytes, chars_compressed, char_count);
|
|
} else {
|
|
JDWP::AppendUtf16BE(bytes, chars, char_count);
|
|
}
|
|
CHECK_EQ(bytes.size(), char_count*2 + sizeof(uint32_t)*2);
|
|
Dbg::DdmSendChunk(type, bytes);
|
|
}
|
|
}
|
|
|
|
void Dbg::DdmSetThreadNotification(bool enable) {
|
|
// Enable/disable thread notifications.
|
|
gDdmThreadNotification = enable;
|
|
if (enable) {
|
|
// Suspend the VM then post thread start notifications for all threads. Threads attaching will
|
|
// see a suspension in progress and block until that ends. They then post their own start
|
|
// notification.
|
|
SuspendVM();
|
|
std::list<Thread*> threads;
|
|
Thread* self = Thread::Current();
|
|
{
|
|
MutexLock mu(self, *Locks::thread_list_lock_);
|
|
threads = Runtime::Current()->GetThreadList()->GetList();
|
|
}
|
|
{
|
|
ScopedObjectAccess soa(self);
|
|
for (Thread* thread : threads) {
|
|
Dbg::DdmSendThreadNotification(thread, CHUNK_TYPE("THCR"));
|
|
}
|
|
}
|
|
ResumeVM();
|
|
}
|
|
}
|
|
|
|
void Dbg::PostThreadStartOrStop(Thread* t, uint32_t type) {
|
|
if (IsDebuggerActive()) {
|
|
gJdwpState->PostThreadChange(t, type == CHUNK_TYPE("THCR"));
|
|
}
|
|
Dbg::DdmSendThreadNotification(t, type);
|
|
}
|
|
|
|
void Dbg::PostThreadStart(Thread* t) {
|
|
Dbg::PostThreadStartOrStop(t, CHUNK_TYPE("THCR"));
|
|
}
|
|
|
|
void Dbg::PostThreadDeath(Thread* t) {
|
|
Dbg::PostThreadStartOrStop(t, CHUNK_TYPE("THDE"));
|
|
}
|
|
|
|
void Dbg::DdmSendChunk(uint32_t type, size_t byte_count, const uint8_t* buf) {
|
|
CHECK(buf != nullptr);
|
|
iovec vec[1];
|
|
vec[0].iov_base = reinterpret_cast<void*>(const_cast<uint8_t*>(buf));
|
|
vec[0].iov_len = byte_count;
|
|
Dbg::DdmSendChunkV(type, vec, 1);
|
|
}
|
|
|
|
void Dbg::DdmSendChunk(uint32_t type, const std::vector<uint8_t>& bytes) {
|
|
DdmSendChunk(type, bytes.size(), &bytes[0]);
|
|
}
|
|
|
|
void Dbg::DdmSendChunkV(uint32_t type, const iovec* iov, int iov_count) {
|
|
if (gJdwpState == nullptr) {
|
|
VLOG(jdwp) << "Debugger thread not active, ignoring DDM send: " << type;
|
|
} else {
|
|
gJdwpState->DdmSendChunkV(type, iov, iov_count);
|
|
}
|
|
}
|
|
|
|
JDWP::JdwpState* Dbg::GetJdwpState() {
|
|
return gJdwpState;
|
|
}
|
|
|
|
int Dbg::DdmHandleHpifChunk(HpifWhen when) {
|
|
if (when == HPIF_WHEN_NOW) {
|
|
DdmSendHeapInfo(when);
|
|
return true;
|
|
}
|
|
|
|
if (when != HPIF_WHEN_NEVER && when != HPIF_WHEN_NEXT_GC && when != HPIF_WHEN_EVERY_GC) {
|
|
LOG(ERROR) << "invalid HpifWhen value: " << static_cast<int>(when);
|
|
return false;
|
|
}
|
|
|
|
gDdmHpifWhen = when;
|
|
return true;
|
|
}
|
|
|
|
bool Dbg::DdmHandleHpsgNhsgChunk(Dbg::HpsgWhen when, Dbg::HpsgWhat what, bool native) {
|
|
if (when != HPSG_WHEN_NEVER && when != HPSG_WHEN_EVERY_GC) {
|
|
LOG(ERROR) << "invalid HpsgWhen value: " << static_cast<int>(when);
|
|
return false;
|
|
}
|
|
|
|
if (what != HPSG_WHAT_MERGED_OBJECTS && what != HPSG_WHAT_DISTINCT_OBJECTS) {
|
|
LOG(ERROR) << "invalid HpsgWhat value: " << static_cast<int>(what);
|
|
return false;
|
|
}
|
|
|
|
if (native) {
|
|
gDdmNhsgWhen = when;
|
|
gDdmNhsgWhat = what;
|
|
} else {
|
|
gDdmHpsgWhen = when;
|
|
gDdmHpsgWhat = what;
|
|
}
|
|
return true;
|
|
}
|
|
|
|
void Dbg::DdmSendHeapInfo(HpifWhen reason) {
|
|
// If there's a one-shot 'when', reset it.
|
|
if (reason == gDdmHpifWhen) {
|
|
if (gDdmHpifWhen == HPIF_WHEN_NEXT_GC) {
|
|
gDdmHpifWhen = HPIF_WHEN_NEVER;
|
|
}
|
|
}
|
|
|
|
/*
|
|
* Chunk HPIF (client --> server)
|
|
*
|
|
* Heap Info. General information about the heap,
|
|
* suitable for a summary display.
|
|
*
|
|
* [u4]: number of heaps
|
|
*
|
|
* For each heap:
|
|
* [u4]: heap ID
|
|
* [u8]: timestamp in ms since Unix epoch
|
|
* [u1]: capture reason (same as 'when' value from server)
|
|
* [u4]: max heap size in bytes (-Xmx)
|
|
* [u4]: current heap size in bytes
|
|
* [u4]: current number of bytes allocated
|
|
* [u4]: current number of objects allocated
|
|
*/
|
|
uint8_t heap_count = 1;
|
|
gc::Heap* heap = Runtime::Current()->GetHeap();
|
|
std::vector<uint8_t> bytes;
|
|
JDWP::Append4BE(bytes, heap_count);
|
|
JDWP::Append4BE(bytes, 1); // Heap id (bogus; we only have one heap).
|
|
JDWP::Append8BE(bytes, MilliTime());
|
|
JDWP::Append1BE(bytes, reason);
|
|
JDWP::Append4BE(bytes, heap->GetMaxMemory()); // Max allowed heap size in bytes.
|
|
JDWP::Append4BE(bytes, heap->GetTotalMemory()); // Current heap size in bytes.
|
|
JDWP::Append4BE(bytes, heap->GetBytesAllocated());
|
|
JDWP::Append4BE(bytes, heap->GetObjectsAllocated());
|
|
CHECK_EQ(bytes.size(), 4U + (heap_count * (4 + 8 + 1 + 4 + 4 + 4 + 4)));
|
|
Dbg::DdmSendChunk(CHUNK_TYPE("HPIF"), bytes);
|
|
}
|
|
|
|
enum HpsgSolidity {
|
|
SOLIDITY_FREE = 0,
|
|
SOLIDITY_HARD = 1,
|
|
SOLIDITY_SOFT = 2,
|
|
SOLIDITY_WEAK = 3,
|
|
SOLIDITY_PHANTOM = 4,
|
|
SOLIDITY_FINALIZABLE = 5,
|
|
SOLIDITY_SWEEP = 6,
|
|
};
|
|
|
|
enum HpsgKind {
|
|
KIND_OBJECT = 0,
|
|
KIND_CLASS_OBJECT = 1,
|
|
KIND_ARRAY_1 = 2,
|
|
KIND_ARRAY_2 = 3,
|
|
KIND_ARRAY_4 = 4,
|
|
KIND_ARRAY_8 = 5,
|
|
KIND_UNKNOWN = 6,
|
|
KIND_NATIVE = 7,
|
|
};
|
|
|
|
#define HPSG_PARTIAL (1<<7)
|
|
#define HPSG_STATE(solidity, kind) ((uint8_t)((((kind) & 0x7) << 3) | ((solidity) & 0x7)))
|
|
|
|
class HeapChunkContext {
|
|
public:
|
|
// Maximum chunk size. Obtain this from the formula:
|
|
// (((maximum_heap_size / ALLOCATION_UNIT_SIZE) + 255) / 256) * 2
|
|
HeapChunkContext(bool merge, bool native)
|
|
: buf_(16384 - 16),
|
|
type_(0),
|
|
chunk_overhead_(0) {
|
|
Reset();
|
|
if (native) {
|
|
type_ = CHUNK_TYPE("NHSG");
|
|
} else {
|
|
type_ = merge ? CHUNK_TYPE("HPSG") : CHUNK_TYPE("HPSO");
|
|
}
|
|
}
|
|
|
|
~HeapChunkContext() {
|
|
if (p_ > &buf_[0]) {
|
|
Flush();
|
|
}
|
|
}
|
|
|
|
void SetChunkOverhead(size_t chunk_overhead) {
|
|
chunk_overhead_ = chunk_overhead;
|
|
}
|
|
|
|
void ResetStartOfNextChunk() {
|
|
startOfNextMemoryChunk_ = nullptr;
|
|
}
|
|
|
|
void EnsureHeader(const void* chunk_ptr) {
|
|
if (!needHeader_) {
|
|
return;
|
|
}
|
|
|
|
// Start a new HPSx chunk.
|
|
JDWP::Write4BE(&p_, 1); // Heap id (bogus; we only have one heap).
|
|
JDWP::Write1BE(&p_, 8); // Size of allocation unit, in bytes.
|
|
|
|
JDWP::Write4BE(&p_, reinterpret_cast<uintptr_t>(chunk_ptr)); // virtual address of segment start.
|
|
JDWP::Write4BE(&p_, 0); // offset of this piece (relative to the virtual address).
|
|
// [u4]: length of piece, in allocation units
|
|
// We won't know this until we're done, so save the offset and stuff in a dummy value.
|
|
pieceLenField_ = p_;
|
|
JDWP::Write4BE(&p_, 0x55555555);
|
|
needHeader_ = false;
|
|
}
|
|
|
|
void Flush() REQUIRES_SHARED(Locks::mutator_lock_) {
|
|
if (pieceLenField_ == nullptr) {
|
|
// Flush immediately post Reset (maybe back-to-back Flush). Ignore.
|
|
CHECK(needHeader_);
|
|
return;
|
|
}
|
|
// Patch the "length of piece" field.
|
|
CHECK_LE(&buf_[0], pieceLenField_);
|
|
CHECK_LE(pieceLenField_, p_);
|
|
JDWP::Set4BE(pieceLenField_, totalAllocationUnits_);
|
|
|
|
Dbg::DdmSendChunk(type_, p_ - &buf_[0], &buf_[0]);
|
|
Reset();
|
|
}
|
|
|
|
static void HeapChunkJavaCallback(void* start, void* end, size_t used_bytes, void* arg)
|
|
REQUIRES_SHARED(Locks::heap_bitmap_lock_,
|
|
Locks::mutator_lock_) {
|
|
reinterpret_cast<HeapChunkContext*>(arg)->HeapChunkJavaCallback(start, end, used_bytes);
|
|
}
|
|
|
|
static void HeapChunkNativeCallback(void* start, void* end, size_t used_bytes, void* arg)
|
|
REQUIRES_SHARED(Locks::mutator_lock_) {
|
|
reinterpret_cast<HeapChunkContext*>(arg)->HeapChunkNativeCallback(start, end, used_bytes);
|
|
}
|
|
|
|
private:
|
|
enum { ALLOCATION_UNIT_SIZE = 8 };
|
|
|
|
void Reset() {
|
|
p_ = &buf_[0];
|
|
ResetStartOfNextChunk();
|
|
totalAllocationUnits_ = 0;
|
|
needHeader_ = true;
|
|
pieceLenField_ = nullptr;
|
|
}
|
|
|
|
bool IsNative() const {
|
|
return type_ == CHUNK_TYPE("NHSG");
|
|
}
|
|
|
|
// Returns true if the object is not an empty chunk.
|
|
bool ProcessRecord(void* start, size_t used_bytes) REQUIRES_SHARED(Locks::mutator_lock_) {
|
|
// Note: heap call backs cannot manipulate the heap upon which they are crawling, care is taken
|
|
// in the following code not to allocate memory, by ensuring buf_ is of the correct size
|
|
if (used_bytes == 0) {
|
|
if (start == nullptr) {
|
|
// Reset for start of new heap.
|
|
startOfNextMemoryChunk_ = nullptr;
|
|
Flush();
|
|
}
|
|
// Only process in use memory so that free region information
|
|
// also includes dlmalloc book keeping.
|
|
return false;
|
|
}
|
|
if (startOfNextMemoryChunk_ != nullptr) {
|
|
// Transmit any pending free memory. Native free memory of over kMaxFreeLen could be because
|
|
// of the use of mmaps, so don't report. If not free memory then start a new segment.
|
|
bool flush = true;
|
|
if (start > startOfNextMemoryChunk_) {
|
|
const size_t kMaxFreeLen = 2 * kPageSize;
|
|
void* free_start = startOfNextMemoryChunk_;
|
|
void* free_end = start;
|
|
const size_t free_len =
|
|
reinterpret_cast<uintptr_t>(free_end) - reinterpret_cast<uintptr_t>(free_start);
|
|
if (!IsNative() || free_len < kMaxFreeLen) {
|
|
AppendChunk(HPSG_STATE(SOLIDITY_FREE, 0), free_start, free_len, IsNative());
|
|
flush = false;
|
|
}
|
|
}
|
|
if (flush) {
|
|
startOfNextMemoryChunk_ = nullptr;
|
|
Flush();
|
|
}
|
|
}
|
|
return true;
|
|
}
|
|
|
|
void HeapChunkNativeCallback(void* start, void* /*end*/, size_t used_bytes)
|
|
REQUIRES_SHARED(Locks::mutator_lock_) {
|
|
if (ProcessRecord(start, used_bytes)) {
|
|
uint8_t state = ExamineNativeObject(start);
|
|
AppendChunk(state, start, used_bytes + chunk_overhead_, true /*is_native*/);
|
|
startOfNextMemoryChunk_ = reinterpret_cast<char*>(start) + used_bytes + chunk_overhead_;
|
|
}
|
|
}
|
|
|
|
void HeapChunkJavaCallback(void* start, void* /*end*/, size_t used_bytes)
|
|
REQUIRES_SHARED(Locks::heap_bitmap_lock_, Locks::mutator_lock_) {
|
|
if (ProcessRecord(start, used_bytes)) {
|
|
// Determine the type of this chunk.
|
|
// OLD-TODO: if context.merge, see if this chunk is different from the last chunk.
|
|
// If it's the same, we should combine them.
|
|
uint8_t state = ExamineJavaObject(reinterpret_cast<mirror::Object*>(start));
|
|
AppendChunk(state, start, used_bytes + chunk_overhead_, false /*is_native*/);
|
|
startOfNextMemoryChunk_ = reinterpret_cast<char*>(start) + used_bytes + chunk_overhead_;
|
|
}
|
|
}
|
|
|
|
void AppendChunk(uint8_t state, void* ptr, size_t length, bool is_native)
|
|
REQUIRES_SHARED(Locks::mutator_lock_) {
|
|
// Make sure there's enough room left in the buffer.
|
|
// We need to use two bytes for every fractional 256 allocation units used by the chunk plus
|
|
// 17 bytes for any header.
|
|
const size_t needed = ((RoundUp(length / ALLOCATION_UNIT_SIZE, 256) / 256) * 2) + 17;
|
|
size_t byte_left = &buf_.back() - p_;
|
|
if (byte_left < needed) {
|
|
if (is_native) {
|
|
// Cannot trigger memory allocation while walking native heap.
|
|
return;
|
|
}
|
|
Flush();
|
|
}
|
|
|
|
byte_left = &buf_.back() - p_;
|
|
if (byte_left < needed) {
|
|
LOG(WARNING) << "Chunk is too big to transmit (chunk_len=" << length << ", "
|
|
<< needed << " bytes)";
|
|
return;
|
|
}
|
|
EnsureHeader(ptr);
|
|
// Write out the chunk description.
|
|
length /= ALLOCATION_UNIT_SIZE; // Convert to allocation units.
|
|
totalAllocationUnits_ += length;
|
|
while (length > 256) {
|
|
*p_++ = state | HPSG_PARTIAL;
|
|
*p_++ = 255; // length - 1
|
|
length -= 256;
|
|
}
|
|
*p_++ = state;
|
|
*p_++ = length - 1;
|
|
}
|
|
|
|
uint8_t ExamineNativeObject(const void* p) REQUIRES_SHARED(Locks::mutator_lock_) {
|
|
return p == nullptr ? HPSG_STATE(SOLIDITY_FREE, 0) : HPSG_STATE(SOLIDITY_HARD, KIND_NATIVE);
|
|
}
|
|
|
|
uint8_t ExamineJavaObject(mirror::Object* o)
|
|
REQUIRES_SHARED(Locks::mutator_lock_, Locks::heap_bitmap_lock_) {
|
|
if (o == nullptr) {
|
|
return HPSG_STATE(SOLIDITY_FREE, 0);
|
|
}
|
|
// It's an allocated chunk. Figure out what it is.
|
|
gc::Heap* heap = Runtime::Current()->GetHeap();
|
|
if (!heap->IsLiveObjectLocked(o)) {
|
|
LOG(ERROR) << "Invalid object in managed heap: " << o;
|
|
return HPSG_STATE(SOLIDITY_HARD, KIND_NATIVE);
|
|
}
|
|
mirror::Class* c = o->GetClass();
|
|
if (c == nullptr) {
|
|
// The object was probably just created but hasn't been initialized yet.
|
|
return HPSG_STATE(SOLIDITY_HARD, KIND_OBJECT);
|
|
}
|
|
if (!heap->IsValidObjectAddress(c)) {
|
|
LOG(ERROR) << "Invalid class for managed heap object: " << o << " " << c;
|
|
return HPSG_STATE(SOLIDITY_HARD, KIND_UNKNOWN);
|
|
}
|
|
if (c->GetClass() == nullptr) {
|
|
LOG(ERROR) << "Null class of class " << c << " for object " << o;
|
|
return HPSG_STATE(SOLIDITY_HARD, KIND_UNKNOWN);
|
|
}
|
|
if (c->IsClassClass()) {
|
|
return HPSG_STATE(SOLIDITY_HARD, KIND_CLASS_OBJECT);
|
|
}
|
|
if (c->IsArrayClass()) {
|
|
switch (c->GetComponentSize()) {
|
|
case 1: return HPSG_STATE(SOLIDITY_HARD, KIND_ARRAY_1);
|
|
case 2: return HPSG_STATE(SOLIDITY_HARD, KIND_ARRAY_2);
|
|
case 4: return HPSG_STATE(SOLIDITY_HARD, KIND_ARRAY_4);
|
|
case 8: return HPSG_STATE(SOLIDITY_HARD, KIND_ARRAY_8);
|
|
}
|
|
}
|
|
return HPSG_STATE(SOLIDITY_HARD, KIND_OBJECT);
|
|
}
|
|
|
|
std::vector<uint8_t> buf_;
|
|
uint8_t* p_;
|
|
uint8_t* pieceLenField_;
|
|
void* startOfNextMemoryChunk_;
|
|
size_t totalAllocationUnits_;
|
|
uint32_t type_;
|
|
bool needHeader_;
|
|
size_t chunk_overhead_;
|
|
|
|
DISALLOW_COPY_AND_ASSIGN(HeapChunkContext);
|
|
};
|
|
|
|
void Dbg::DdmSendHeapSegments(bool native) {
|
|
Dbg::HpsgWhen when = native ? gDdmNhsgWhen : gDdmHpsgWhen;
|
|
Dbg::HpsgWhat what = native ? gDdmNhsgWhat : gDdmHpsgWhat;
|
|
if (when == HPSG_WHEN_NEVER) {
|
|
return;
|
|
}
|
|
// Figure out what kind of chunks we'll be sending.
|
|
CHECK(what == HPSG_WHAT_MERGED_OBJECTS || what == HPSG_WHAT_DISTINCT_OBJECTS)
|
|
<< static_cast<int>(what);
|
|
|
|
// First, send a heap start chunk.
|
|
uint8_t heap_id[4];
|
|
JDWP::Set4BE(&heap_id[0], 1); // Heap id (bogus; we only have one heap).
|
|
Dbg::DdmSendChunk(native ? CHUNK_TYPE("NHST") : CHUNK_TYPE("HPST"), sizeof(heap_id), heap_id);
|
|
Thread* self = Thread::Current();
|
|
Locks::mutator_lock_->AssertSharedHeld(self);
|
|
|
|
// Send a series of heap segment chunks.
|
|
HeapChunkContext context(what == HPSG_WHAT_MERGED_OBJECTS, native);
|
|
auto bump_pointer_space_visitor = [&](mirror::Object* obj)
|
|
REQUIRES_SHARED(Locks::mutator_lock_) REQUIRES(Locks::heap_bitmap_lock_) {
|
|
const size_t size = RoundUp(obj->SizeOf(), kObjectAlignment);
|
|
HeapChunkContext::HeapChunkJavaCallback(
|
|
obj, reinterpret_cast<void*>(reinterpret_cast<uintptr_t>(obj) + size), size, &context);
|
|
};
|
|
if (native) {
|
|
UNIMPLEMENTED(WARNING) << "Native heap inspection is not supported";
|
|
} else {
|
|
gc::Heap* heap = Runtime::Current()->GetHeap();
|
|
for (const auto& space : heap->GetContinuousSpaces()) {
|
|
if (space->IsDlMallocSpace()) {
|
|
ReaderMutexLock mu(self, *Locks::heap_bitmap_lock_);
|
|
// dlmalloc's chunk header is 2 * sizeof(size_t), but if the previous chunk is in use for an
|
|
// allocation then the first sizeof(size_t) may belong to it.
|
|
context.SetChunkOverhead(sizeof(size_t));
|
|
space->AsDlMallocSpace()->Walk(HeapChunkContext::HeapChunkJavaCallback, &context);
|
|
} else if (space->IsRosAllocSpace()) {
|
|
context.SetChunkOverhead(0);
|
|
// Need to acquire the mutator lock before the heap bitmap lock with exclusive access since
|
|
// RosAlloc's internal logic doesn't know to release and reacquire the heap bitmap lock.
|
|
ScopedThreadSuspension sts(self, kSuspended);
|
|
ScopedSuspendAll ssa(__FUNCTION__);
|
|
ReaderMutexLock mu(self, *Locks::heap_bitmap_lock_);
|
|
space->AsRosAllocSpace()->Walk(HeapChunkContext::HeapChunkJavaCallback, &context);
|
|
} else if (space->IsBumpPointerSpace()) {
|
|
ReaderMutexLock mu(self, *Locks::heap_bitmap_lock_);
|
|
context.SetChunkOverhead(0);
|
|
space->AsBumpPointerSpace()->Walk(bump_pointer_space_visitor);
|
|
HeapChunkContext::HeapChunkJavaCallback(nullptr, nullptr, 0, &context);
|
|
} else if (space->IsRegionSpace()) {
|
|
heap->IncrementDisableMovingGC(self);
|
|
{
|
|
ScopedThreadSuspension sts(self, kSuspended);
|
|
ScopedSuspendAll ssa(__FUNCTION__);
|
|
ReaderMutexLock mu(self, *Locks::heap_bitmap_lock_);
|
|
context.SetChunkOverhead(0);
|
|
space->AsRegionSpace()->Walk(bump_pointer_space_visitor);
|
|
HeapChunkContext::HeapChunkJavaCallback(nullptr, nullptr, 0, &context);
|
|
}
|
|
heap->DecrementDisableMovingGC(self);
|
|
} else {
|
|
UNIMPLEMENTED(WARNING) << "Not counting objects in space " << *space;
|
|
}
|
|
context.ResetStartOfNextChunk();
|
|
}
|
|
ReaderMutexLock mu(self, *Locks::heap_bitmap_lock_);
|
|
// Walk the large objects, these are not in the AllocSpace.
|
|
context.SetChunkOverhead(0);
|
|
heap->GetLargeObjectsSpace()->Walk(HeapChunkContext::HeapChunkJavaCallback, &context);
|
|
}
|
|
|
|
// Finally, send a heap end chunk.
|
|
Dbg::DdmSendChunk(native ? CHUNK_TYPE("NHEN") : CHUNK_TYPE("HPEN"), sizeof(heap_id), heap_id);
|
|
}
|
|
|
|
void Dbg::SetAllocTrackingEnabled(bool enable) {
|
|
gc::AllocRecordObjectMap::SetAllocTrackingEnabled(enable);
|
|
}
|
|
|
|
void Dbg::DumpRecentAllocations() {
|
|
ScopedObjectAccess soa(Thread::Current());
|
|
MutexLock mu(soa.Self(), *Locks::alloc_tracker_lock_);
|
|
if (!Runtime::Current()->GetHeap()->IsAllocTrackingEnabled()) {
|
|
LOG(INFO) << "Not recording tracked allocations";
|
|
return;
|
|
}
|
|
gc::AllocRecordObjectMap* records = Runtime::Current()->GetHeap()->GetAllocationRecords();
|
|
CHECK(records != nullptr);
|
|
|
|
const uint16_t capped_count = CappedAllocRecordCount(records->GetRecentAllocationSize());
|
|
uint16_t count = capped_count;
|
|
|
|
LOG(INFO) << "Tracked allocations, (count=" << count << ")";
|
|
for (auto it = records->RBegin(), end = records->REnd();
|
|
count > 0 && it != end; count--, it++) {
|
|
const gc::AllocRecord* record = &it->second;
|
|
|
|
LOG(INFO) << StringPrintf(" Thread %-2d %6zd bytes ", record->GetTid(), record->ByteCount())
|
|
<< mirror::Class::PrettyClass(record->GetClass());
|
|
|
|
for (size_t stack_frame = 0, depth = record->GetDepth(); stack_frame < depth; ++stack_frame) {
|
|
const gc::AllocRecordStackTraceElement& stack_element = record->StackElement(stack_frame);
|
|
ArtMethod* m = stack_element.GetMethod();
|
|
LOG(INFO) << " " << ArtMethod::PrettyMethod(m) << " line "
|
|
<< stack_element.ComputeLineNumber();
|
|
}
|
|
|
|
// pause periodically to help logcat catch up
|
|
if ((count % 5) == 0) {
|
|
usleep(40000);
|
|
}
|
|
}
|
|
}
|
|
|
|
class StringTable {
|
|
private:
|
|
struct Entry {
|
|
explicit Entry(const char* data_in)
|
|
: data(data_in), hash(ComputeModifiedUtf8Hash(data_in)), index(0) {
|
|
}
|
|
Entry(const Entry& entry) = default;
|
|
Entry(Entry&& entry) = default;
|
|
|
|
// Pointer to the actual string data.
|
|
const char* data;
|
|
|
|
// The hash of the data.
|
|
const uint32_t hash;
|
|
|
|
// The index. This will be filled in on Finish and is not part of the ordering, so mark it
|
|
// mutable.
|
|
mutable uint32_t index;
|
|
|
|
bool operator==(const Entry& other) const {
|
|
return strcmp(data, other.data) == 0;
|
|
}
|
|
};
|
|
struct EntryHash {
|
|
size_t operator()(const Entry& entry) const {
|
|
return entry.hash;
|
|
}
|
|
};
|
|
|
|
public:
|
|
StringTable() : finished_(false) {
|
|
}
|
|
|
|
void Add(const char* str, bool copy_string) {
|
|
DCHECK(!finished_);
|
|
if (UNLIKELY(copy_string)) {
|
|
// Check whether it's already there.
|
|
Entry entry(str);
|
|
if (table_.find(entry) != table_.end()) {
|
|
return;
|
|
}
|
|
|
|
// Make a copy.
|
|
size_t str_len = strlen(str);
|
|
char* copy = new char[str_len + 1];
|
|
strlcpy(copy, str, str_len + 1);
|
|
string_backup_.emplace_back(copy);
|
|
str = copy;
|
|
}
|
|
Entry entry(str);
|
|
table_.insert(entry);
|
|
}
|
|
|
|
// Update all entries and give them an index. Note that this is likely not the insertion order,
|
|
// as the set will with high likelihood reorder elements. Thus, Add must not be called after
|
|
// Finish, and Finish must be called before IndexOf. In that case, WriteTo will walk in
|
|
// the same order as Finish, and indices will agree. The order invariant, as well as indices,
|
|
// are enforced through debug checks.
|
|
void Finish() {
|
|
DCHECK(!finished_);
|
|
finished_ = true;
|
|
uint32_t index = 0;
|
|
for (auto& entry : table_) {
|
|
entry.index = index;
|
|
++index;
|
|
}
|
|
}
|
|
|
|
size_t IndexOf(const char* s) const {
|
|
DCHECK(finished_);
|
|
Entry entry(s);
|
|
auto it = table_.find(entry);
|
|
if (it == table_.end()) {
|
|
LOG(FATAL) << "IndexOf(\"" << s << "\") failed";
|
|
}
|
|
return it->index;
|
|
}
|
|
|
|
size_t Size() const {
|
|
return table_.size();
|
|
}
|
|
|
|
void WriteTo(std::vector<uint8_t>& bytes) const {
|
|
DCHECK(finished_);
|
|
uint32_t cur_index = 0;
|
|
for (const auto& entry : table_) {
|
|
DCHECK_EQ(cur_index++, entry.index);
|
|
|
|
size_t s_len = CountModifiedUtf8Chars(entry.data);
|
|
std::unique_ptr<uint16_t[]> s_utf16(new uint16_t[s_len]);
|
|
ConvertModifiedUtf8ToUtf16(s_utf16.get(), entry.data);
|
|
JDWP::AppendUtf16BE(bytes, s_utf16.get(), s_len);
|
|
}
|
|
}
|
|
|
|
private:
|
|
std::unordered_set<Entry, EntryHash> table_;
|
|
std::vector<std::unique_ptr<char[]>> string_backup_;
|
|
|
|
bool finished_;
|
|
|
|
DISALLOW_COPY_AND_ASSIGN(StringTable);
|
|
};
|
|
|
|
static const char* GetMethodSourceFile(ArtMethod* method)
|
|
REQUIRES_SHARED(Locks::mutator_lock_) {
|
|
DCHECK(method != nullptr);
|
|
const char* source_file = method->GetDeclaringClassSourceFile();
|
|
return (source_file != nullptr) ? source_file : "";
|
|
}
|
|
|
|
/*
|
|
* The data we send to DDMS contains everything we have recorded.
|
|
*
|
|
* Message header (all values big-endian):
|
|
* (1b) message header len (to allow future expansion); includes itself
|
|
* (1b) entry header len
|
|
* (1b) stack frame len
|
|
* (2b) number of entries
|
|
* (4b) offset to string table from start of message
|
|
* (2b) number of class name strings
|
|
* (2b) number of method name strings
|
|
* (2b) number of source file name strings
|
|
* For each entry:
|
|
* (4b) total allocation size
|
|
* (2b) thread id
|
|
* (2b) allocated object's class name index
|
|
* (1b) stack depth
|
|
* For each stack frame:
|
|
* (2b) method's class name
|
|
* (2b) method name
|
|
* (2b) method source file
|
|
* (2b) line number, clipped to 32767; -2 if native; -1 if no source
|
|
* (xb) class name strings
|
|
* (xb) method name strings
|
|
* (xb) source file strings
|
|
*
|
|
* As with other DDM traffic, strings are sent as a 4-byte length
|
|
* followed by UTF-16 data.
|
|
*
|
|
* We send up 16-bit unsigned indexes into string tables. In theory there
|
|
* can be (kMaxAllocRecordStackDepth * alloc_record_max_) unique strings in
|
|
* each table, but in practice there should be far fewer.
|
|
*
|
|
* The chief reason for using a string table here is to keep the size of
|
|
* the DDMS message to a minimum. This is partly to make the protocol
|
|
* efficient, but also because we have to form the whole thing up all at
|
|
* once in a memory buffer.
|
|
*
|
|
* We use separate string tables for class names, method names, and source
|
|
* files to keep the indexes small. There will generally be no overlap
|
|
* between the contents of these tables.
|
|
*/
|
|
jbyteArray Dbg::GetRecentAllocations() {
|
|
if ((false)) {
|
|
DumpRecentAllocations();
|
|
}
|
|
|
|
Thread* self = Thread::Current();
|
|
std::vector<uint8_t> bytes;
|
|
{
|
|
MutexLock mu(self, *Locks::alloc_tracker_lock_);
|
|
gc::AllocRecordObjectMap* records = Runtime::Current()->GetHeap()->GetAllocationRecords();
|
|
// In case this method is called when allocation tracker is disabled,
|
|
// we should still send some data back.
|
|
gc::AllocRecordObjectMap dummy;
|
|
if (records == nullptr) {
|
|
CHECK(!Runtime::Current()->GetHeap()->IsAllocTrackingEnabled());
|
|
records = &dummy;
|
|
}
|
|
// We don't need to wait on the condition variable records->new_record_condition_, because this
|
|
// function only reads the class objects, which are already marked so it doesn't change their
|
|
// reachability.
|
|
|
|
//
|
|
// Part 1: generate string tables.
|
|
//
|
|
StringTable class_names;
|
|
StringTable method_names;
|
|
StringTable filenames;
|
|
|
|
VLOG(jdwp) << "Collecting StringTables.";
|
|
|
|
const uint16_t capped_count = CappedAllocRecordCount(records->GetRecentAllocationSize());
|
|
uint16_t count = capped_count;
|
|
size_t alloc_byte_count = 0;
|
|
for (auto it = records->RBegin(), end = records->REnd();
|
|
count > 0 && it != end; count--, it++) {
|
|
const gc::AllocRecord* record = &it->second;
|
|
std::string temp;
|
|
const char* class_descr = record->GetClassDescriptor(&temp);
|
|
class_names.Add(class_descr, !temp.empty());
|
|
|
|
// Size + tid + class name index + stack depth.
|
|
alloc_byte_count += 4u + 2u + 2u + 1u;
|
|
|
|
for (size_t i = 0, depth = record->GetDepth(); i < depth; i++) {
|
|
ArtMethod* m = record->StackElement(i).GetMethod();
|
|
class_names.Add(m->GetDeclaringClassDescriptor(), false);
|
|
method_names.Add(m->GetName(), false);
|
|
filenames.Add(GetMethodSourceFile(m), false);
|
|
}
|
|
|
|
// Depth * (class index + method name index + file name index + line number).
|
|
alloc_byte_count += record->GetDepth() * (2u + 2u + 2u + 2u);
|
|
}
|
|
|
|
class_names.Finish();
|
|
method_names.Finish();
|
|
filenames.Finish();
|
|
VLOG(jdwp) << "Done collecting StringTables:" << std::endl
|
|
<< " ClassNames: " << class_names.Size() << std::endl
|
|
<< " MethodNames: " << method_names.Size() << std::endl
|
|
<< " Filenames: " << filenames.Size();
|
|
|
|
LOG(INFO) << "recent allocation records: " << capped_count;
|
|
LOG(INFO) << "allocation records all objects: " << records->Size();
|
|
|
|
//
|
|
// Part 2: Generate the output and store it in the buffer.
|
|
//
|
|
|
|
// (1b) message header len (to allow future expansion); includes itself
|
|
// (1b) entry header len
|
|
// (1b) stack frame len
|
|
const int kMessageHeaderLen = 15;
|
|
const int kEntryHeaderLen = 9;
|
|
const int kStackFrameLen = 8;
|
|
JDWP::Append1BE(bytes, kMessageHeaderLen);
|
|
JDWP::Append1BE(bytes, kEntryHeaderLen);
|
|
JDWP::Append1BE(bytes, kStackFrameLen);
|
|
|
|
// (2b) number of entries
|
|
// (4b) offset to string table from start of message
|
|
// (2b) number of class name strings
|
|
// (2b) number of method name strings
|
|
// (2b) number of source file name strings
|
|
JDWP::Append2BE(bytes, capped_count);
|
|
size_t string_table_offset = bytes.size();
|
|
JDWP::Append4BE(bytes, 0); // We'll patch this later...
|
|
JDWP::Append2BE(bytes, class_names.Size());
|
|
JDWP::Append2BE(bytes, method_names.Size());
|
|
JDWP::Append2BE(bytes, filenames.Size());
|
|
|
|
VLOG(jdwp) << "Dumping allocations with stacks";
|
|
|
|
// Enlarge the vector for the allocation data.
|
|
size_t reserve_size = bytes.size() + alloc_byte_count;
|
|
bytes.reserve(reserve_size);
|
|
|
|
std::string temp;
|
|
count = capped_count;
|
|
// The last "count" number of allocation records in "records" are the most recent "count" number
|
|
// of allocations. Reverse iterate to get them. The most recent allocation is sent first.
|
|
for (auto it = records->RBegin(), end = records->REnd();
|
|
count > 0 && it != end; count--, it++) {
|
|
// For each entry:
|
|
// (4b) total allocation size
|
|
// (2b) thread id
|
|
// (2b) allocated object's class name index
|
|
// (1b) stack depth
|
|
const gc::AllocRecord* record = &it->second;
|
|
size_t stack_depth = record->GetDepth();
|
|
size_t allocated_object_class_name_index =
|
|
class_names.IndexOf(record->GetClassDescriptor(&temp));
|
|
JDWP::Append4BE(bytes, record->ByteCount());
|
|
JDWP::Append2BE(bytes, static_cast<uint16_t>(record->GetTid()));
|
|
JDWP::Append2BE(bytes, allocated_object_class_name_index);
|
|
JDWP::Append1BE(bytes, stack_depth);
|
|
|
|
for (size_t stack_frame = 0; stack_frame < stack_depth; ++stack_frame) {
|
|
// For each stack frame:
|
|
// (2b) method's class name
|
|
// (2b) method name
|
|
// (2b) method source file
|
|
// (2b) line number, clipped to 32767; -2 if native; -1 if no source
|
|
ArtMethod* m = record->StackElement(stack_frame).GetMethod();
|
|
size_t class_name_index = class_names.IndexOf(m->GetDeclaringClassDescriptor());
|
|
size_t method_name_index = method_names.IndexOf(m->GetName());
|
|
size_t file_name_index = filenames.IndexOf(GetMethodSourceFile(m));
|
|
JDWP::Append2BE(bytes, class_name_index);
|
|
JDWP::Append2BE(bytes, method_name_index);
|
|
JDWP::Append2BE(bytes, file_name_index);
|
|
JDWP::Append2BE(bytes, record->StackElement(stack_frame).ComputeLineNumber());
|
|
}
|
|
}
|
|
|
|
CHECK_EQ(bytes.size(), reserve_size);
|
|
VLOG(jdwp) << "Dumping tables.";
|
|
|
|
// (xb) class name strings
|
|
// (xb) method name strings
|
|
// (xb) source file strings
|
|
JDWP::Set4BE(&bytes[string_table_offset], bytes.size());
|
|
class_names.WriteTo(bytes);
|
|
method_names.WriteTo(bytes);
|
|
filenames.WriteTo(bytes);
|
|
|
|
VLOG(jdwp) << "GetRecentAllocations: data created. " << bytes.size();
|
|
}
|
|
JNIEnv* env = self->GetJniEnv();
|
|
jbyteArray result = env->NewByteArray(bytes.size());
|
|
if (result != nullptr) {
|
|
env->SetByteArrayRegion(result, 0, bytes.size(), reinterpret_cast<const jbyte*>(&bytes[0]));
|
|
}
|
|
return result;
|
|
}
|
|
|
|
ArtMethod* DeoptimizationRequest::Method() const {
|
|
return jni::DecodeArtMethod(method_);
|
|
}
|
|
|
|
void DeoptimizationRequest::SetMethod(ArtMethod* m) {
|
|
method_ = jni::EncodeArtMethod(m);
|
|
}
|
|
|
|
void Dbg::VisitRoots(RootVisitor* visitor) {
|
|
// Visit breakpoint roots, used to prevent unloading of methods with breakpoints.
|
|
ReaderMutexLock mu(Thread::Current(), *Locks::breakpoint_lock_);
|
|
BufferedRootVisitor<128> root_visitor(visitor, RootInfo(kRootVMInternal));
|
|
for (Breakpoint& breakpoint : gBreakpoints) {
|
|
breakpoint.Method()->VisitRoots(root_visitor, kRuntimePointerSize);
|
|
}
|
|
}
|
|
|
|
void Dbg::DbgThreadLifecycleCallback::ThreadStart(Thread* self) {
|
|
Dbg::PostThreadStart(self);
|
|
}
|
|
|
|
void Dbg::DbgThreadLifecycleCallback::ThreadDeath(Thread* self) {
|
|
Dbg::PostThreadDeath(self);
|
|
}
|
|
|
|
void Dbg::DbgClassLoadCallback::ClassLoad(Handle<mirror::Class> klass ATTRIBUTE_UNUSED) {
|
|
// Ignore ClassLoad;
|
|
}
|
|
void Dbg::DbgClassLoadCallback::ClassPrepare(Handle<mirror::Class> temp_klass ATTRIBUTE_UNUSED,
|
|
Handle<mirror::Class> klass) {
|
|
Dbg::PostClassPrepare(klass.Get());
|
|
}
|
|
|
|
} // namespace art
|