73 lines
3.5 KiB
C++
73 lines
3.5 KiB
C++
/*
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* Copyright (C) 2012 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 "art_method-inl.h"
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#include "callee_save_frame.h"
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#include "entrypoints/runtime_asm_entrypoints.h"
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#include "instrumentation.h"
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#include "mirror/object-inl.h"
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#include "runtime.h"
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#include "thread-inl.h"
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namespace art {
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extern "C" const void* artInstrumentationMethodEntryFromCode(ArtMethod* method,
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mirror::Object* this_object,
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Thread* self,
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uintptr_t lr)
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SHARED_REQUIRES(Locks::mutator_lock_) {
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// Instrumentation changes the stack. Thus, when exiting, the stack cannot be verified, so skip
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// that part.
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ScopedQuickEntrypointChecks sqec(self, kIsDebugBuild, false);
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instrumentation::Instrumentation* instrumentation = Runtime::Current()->GetInstrumentation();
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const void* result;
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if (instrumentation->IsDeoptimized(method)) {
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result = GetQuickToInterpreterBridge();
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} else {
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result = instrumentation->GetQuickCodeFor(method, sizeof(void*));
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DCHECK(!Runtime::Current()->GetClassLinker()->IsQuickToInterpreterBridge(result));
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}
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bool interpreter_entry = (result == GetQuickToInterpreterBridge());
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instrumentation->PushInstrumentationStackFrame(self, method->IsStatic() ? nullptr : this_object,
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method, lr, interpreter_entry);
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CHECK(result != nullptr) << PrettyMethod(method);
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return result;
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}
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extern "C" TwoWordReturn artInstrumentationMethodExitFromCode(Thread* self, ArtMethod** sp,
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uint64_t gpr_result,
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uint64_t fpr_result)
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SHARED_REQUIRES(Locks::mutator_lock_) {
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// Instrumentation exit stub must not be entered with a pending exception.
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CHECK(!self->IsExceptionPending()) << "Enter instrumentation exit stub with pending exception "
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<< self->GetException()->Dump();
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// Compute address of return PC and sanity check that it currently holds 0.
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size_t return_pc_offset = GetCalleeSaveReturnPcOffset(kRuntimeISA, Runtime::kRefsOnly);
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uintptr_t* return_pc = reinterpret_cast<uintptr_t*>(reinterpret_cast<uint8_t*>(sp) +
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return_pc_offset);
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CHECK_EQ(*return_pc, 0U);
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// Pop the frame filling in the return pc. The low half of the return value is 0 when
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// deoptimization shouldn't be performed with the high-half having the return address. When
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// deoptimization should be performed the low half is zero and the high-half the address of the
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// deoptimization entry point.
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instrumentation::Instrumentation* instrumentation = Runtime::Current()->GetInstrumentation();
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TwoWordReturn return_or_deoptimize_pc = instrumentation->PopInstrumentationStackFrame(
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self, return_pc, gpr_result, fpr_result);
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return return_or_deoptimize_pc;
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}
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} // namespace art
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