166 lines
6.9 KiB
C++
166 lines
6.9 KiB
C++
/*
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* Copyright (C) 2011 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 "check_reference_map_visitor.h"
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#include "jni.h"
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namespace art {
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#define CHECK_REGS_CONTAIN_REFS(dex_pc, abort_if_not_found, ...) do { \
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int t[] = {__VA_ARGS__}; \
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int t_size = sizeof(t) / sizeof(*t); \
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const OatQuickMethodHeader* method_header = GetCurrentOatQuickMethodHeader(); \
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uintptr_t native_quick_pc = method_header->ToNativeQuickPc(GetMethod(), \
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dex_pc, \
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/* is_catch_handler */ false, \
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abort_if_not_found); \
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if (native_quick_pc != UINTPTR_MAX) { \
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CheckReferences(t, t_size, method_header->NativeQuickPcOffset(native_quick_pc)); \
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} \
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} while (false);
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struct ReferenceMap2Visitor : public CheckReferenceMapVisitor {
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explicit ReferenceMap2Visitor(Thread* thread) SHARED_REQUIRES(Locks::mutator_lock_)
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: CheckReferenceMapVisitor(thread) {}
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bool VisitFrame() SHARED_REQUIRES(Locks::mutator_lock_) {
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if (CheckReferenceMapVisitor::VisitFrame()) {
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return true;
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}
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ArtMethod* m = GetMethod();
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std::string m_name(m->GetName());
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// Given the method name and the number of times the method has been called,
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// we know the Dex registers with live reference values. Assert that what we
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// find is what is expected.
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if (m_name.compare("f") == 0) {
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CHECK_REGS_CONTAIN_REFS(0x03U, true, 8); // v8: this
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CHECK_REGS_CONTAIN_REFS(0x06U, true, 8, 1); // v8: this, v1: x
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CHECK_REGS_CONTAIN_REFS(0x0cU, true, 8, 3, 1); // v8: this, v3: y, v1: x
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CHECK_REGS_CONTAIN_REFS(0x10U, true, 8, 3, 1); // v8: this, v3: y, v1: x
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// v2 is added because of the instruction at DexPC 0024. Object merges with 0 is Object. See:
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// 0024: move-object v3, v2
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// 0025: goto 0013
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// Detailed dex instructions for ReferenceMap.java are at the end of this function.
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// CHECK_REGS_CONTAIN_REFS(8, 3, 2, 1); // v8: this, v3: y, v2: y, v1: x
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// We eliminate the non-live registers at a return, so only v3 is live.
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// Note that it is OK for a compiler to not have a dex map at this dex PC because
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// a return is not necessarily a safepoint.
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CHECK_REGS_CONTAIN_REFS(0x14U, false, 2); // v2: y
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// Note that v0: ex can be eliminated because it's a dead merge of two different exceptions.
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CHECK_REGS_CONTAIN_REFS(0x18U, true, 8, 2, 1); // v8: this, v2: y, v1: x (dead v0: ex)
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CHECK_REGS_CONTAIN_REFS(0x22U, true, 8, 2, 1); // v8: this, v2: y, v1: x (dead v0: ex)
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if (!GetCurrentOatQuickMethodHeader()->IsOptimized()) {
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CHECK_REGS_CONTAIN_REFS(0x27U, true, 8, 4, 2, 1); // v8: this, v4: ex, v2: y, v1: x
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}
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CHECK_REGS_CONTAIN_REFS(0x29U, true, 8, 4, 2, 1); // v8: this, v4: ex, v2: y, v1: x
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CHECK_REGS_CONTAIN_REFS(0x2cU, true, 8, 4, 2, 1); // v8: this, v4: ex, v2: y, v1: x
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// Note that it is OK for a compiler to not have a dex map at these two dex PCs because
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// a goto is not necessarily a safepoint.
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CHECK_REGS_CONTAIN_REFS(0x2fU, false, 8, 4, 3, 2, 1); // v8: this, v4: ex, v3: y, v2: y, v1: x
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CHECK_REGS_CONTAIN_REFS(0x32U, false, 8, 3, 2, 1, 0); // v8: this, v3: y, v2: y, v1: x, v0: ex
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}
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return true;
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}
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};
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// DEX code
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//
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// 0000: const/4 v4, #int 2 // #2
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// 0001: const/4 v7, #int 0 // #0
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// 0002: const/4 v6, #int 1 // #1
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// 0003: new-array v1, v4, [Ljava/lang/Object; // type@0007
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// 0005: const/4 v2, #int 0 // #0
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// 0006: new-instance v3, Ljava/lang/Object; // type@0003
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// 0008: invoke-direct {v3}, Ljava/lang/Object;.<init>:()V // method@0004
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// 000b: const/4 v4, #int 2 // #2
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// 000c: aput-object v3, v1, v4
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// 000e: aput-object v3, v1, v6
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// 0010: invoke-virtual {v8, v7}, LMain;.refmap:(I)I // method@0003
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// 0013: move-object v2, v3
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// 0014: return-object v2
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// 0015: move-exception v0
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// 0016: if-nez v2, 0020 // +000a
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// 0018: new-instance v4, Ljava/lang/Object; // type@0003
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// 001a: invoke-direct {v4}, Ljava/lang/Object;.<init>:()V // method@0004
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// 001d: const/4 v5, #int 1 // #1
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// 001e: aput-object v4, v1, v5
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// 0020: aput-object v2, v1, v6
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// 0022: invoke-virtual {v8, v7}, LMain;.refmap:(I)I // method@0003
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// 0025: goto 0014 // -0011
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// 0026: move-exception v4
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// 0027: aput-object v2, v1, v6
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// 0029: invoke-virtual {v8, v7}, LMain;.refmap:(I)I // method@0003
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// 002c: throw v4
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// 002d: move-exception v4
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// 002e: move-object v2, v3
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// 002f: goto 0027 // -0008
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// 0030: move-exception v0
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// 0031: move-object v2, v3
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// 0032: goto 0016 // -001c
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// catches : 3
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// 0x0006 - 0x000b
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// Ljava/lang/Exception; -> 0x0015
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// <any> -> 0x0026
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// 0x000c - 0x000e
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// Ljava/lang/Exception; -> 0x0030
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// <any> -> 0x002d
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// 0x0018 - 0x0020
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// <any> -> 0x0026
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// positions :
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// 0x0003 line=22
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// 0x0005 line=23
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// 0x0006 line=25
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// 0x000b line=26
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// 0x000e line=32
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// 0x0010 line=33
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// 0x0014 line=35
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// 0x0015 line=27
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// 0x0016 line=28
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// 0x0018 line=29
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// 0x0020 line=32
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// 0x0022 line=33
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// 0x0026 line=31
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// 0x0027 line=32
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// 0x0029 line=33
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// 0x002c line=31
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// 0x0030 line=27
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// locals :
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// 0x0006 - 0x000b reg=2 y Ljava/lang/Object;
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// 0x000b - 0x0014 reg=3 y Ljava/lang/Object;
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// 0x0015 - 0x0016 reg=2 y Ljava/lang/Object;
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// 0x0016 - 0x0026 reg=0 ex Ljava/lang/Exception;
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// 0x002d - 0x002f reg=3 y Ljava/lang/Object;
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// 0x002f - 0x0030 reg=2 y Ljava/lang/Object;
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// 0x0030 - 0x0032 reg=3 y Ljava/lang/Object;
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// 0x0031 - 0x0033 reg=0 ex Ljava/lang/Exception;
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// 0x0005 - 0x0033 reg=1 x [Ljava/lang/Object;
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// 0x0032 - 0x0033 reg=2 y Ljava/lang/Object;
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// 0x0000 - 0x0033 reg=8 this LMain;
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extern "C" JNIEXPORT jint JNICALL Java_Main_refmap(JNIEnv*, jobject, jint count) {
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// Visitor
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ScopedObjectAccess soa(Thread::Current());
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ReferenceMap2Visitor mapper(soa.Self());
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mapper.WalkStack();
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return count + 1;
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}
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} // namespace art
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