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216 lines
12 KiB
216 lines
12 KiB
4 months ago
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/*
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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, \
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t_size, \
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dex_pc, \
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method_header->NativeQuickPcOffset(native_quick_pc), \
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/* search_for_valid_stack_map= */ true); \
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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) REQUIRES_SHARED(Locks::mutator_lock_)
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: CheckReferenceMapVisitor(thread) {}
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bool VisitFrame() override REQUIRES_SHARED(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(0x13U, false, 3); // v3: 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(0x21U, 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 instructions for the function 'f' in ReferenceMap.java
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// Virtual methods -
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// #0 : (in LReferenceMap;)
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// name : 'f'
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// type : '()Ljava/lang/Object;'
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// access : 0x0000 ()
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// code -
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// registers : 9
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// ins : 1
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// outs : 2
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// insns size : 51 16-bit code units
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// |[0001e8] ReferenceMap.f:()Ljava/lang/Object;
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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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//
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// 0:[Unknown],1:[Unknown],2:[Unknown],3:[Unknown],4:[32-bit Constant: 2],5:[Unknown],6:[32-bit Constant: 1],7:[Zero],8:[Reference: ReferenceMap],
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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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// 0:[Unknown],1:[Reference: java.lang.Object[]],2:[Zero],3:[Unknown],4:[32-bit Constant: 2],5:[Unknown],6:[32-bit Constant: 1],7:[Zero],8:[Reference: ReferenceMap],
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// |0006: new-instance v3, Ljava/lang/Object; // type@0003
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// [Unknown],1:[Reference: java.lang.Object[]],2:[Zero],3:[Uninitialized Reference: java.lang.Object],4:[32-bit Constant: 2],5:[Unknown],6:[32-bit Constant: 1],7:[Zero],8:[Reference: ReferenceMap],
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// |0008: +invoke-object-init/range {}, Ljava/lang/Object;.<init>:()V // method@0005
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// |000b: const/4 v4, #int 2 // #2
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// 0:[Unknown],1:[Reference: java.lang.Object[]],2:[Zero],3:[Reference: java.lang.Object],4:[32-bit Constant: 2],5:[Unknown],6:[32-bit Constant: 1],7:[Zero],8:[Reference: ReferenceMap],
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// |000c: aput-object v3, v1, v4
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// 0:[Unknown],1:[Reference: java.lang.Object[]],2:[Zero],3:[Reference: java.lang.Object],4:[32-bit Constant: 2],5:[Unknown],6:[32-bit Constant: 1],7:[Zero],8:[Reference: ReferenceMap],
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// |000e: aput-object v3, v1, v6
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// 0:[Unknown],1:[Reference: java.lang.Object[]],2:[Zero],3:[Reference: java.lang.Object],4:[32-bit Constant: 2],5:[Unknown],6:[32-bit Constant: 1],7:[Zero],8:[Reference: ReferenceMap],
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// |0010: +invoke-virtual-quick {v8, v7}, [000c] // vtable #000c
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// 0:[Conflict],1:[Conflict],2:[Conflict],3:[Reference: java.lang.Object],4:[Conflict],5:[Conflict],6:[Conflict],7:[Conflict],8:[Conflict],
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// |0013: return-object v3
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// |0014: move-exception v0
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// 0:[Reference: java.lang.Exception],1:[Reference: java.lang.Object[]],2:[Reference: java.lang.Object],3:[Conflict],4:[32-bit Constant: 2],5:[Unknown],6:[32-bit Constant: 1],7:[Zero],8:[Reference: ReferenceMap],
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// |0015: if-nez v2, 001f // +000a
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// |0017: const/4 v4, #int 1 // #1
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// 0:[Reference: java.lang.Exception],1:[Reference: java.lang.Object[]],2:[Reference: java.lang.Object],3:[Conflict],4:[32-bit Constant: 1],5:[Unknown],6:[32-bit Constant: 1],7:[Zero],8:[Reference: ReferenceMap],
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// |0018: new-instance v5, Ljava/lang/Object; // type@0003
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// 0:[Reference: java.lang.Exception],1:[Reference: java.lang.Object[]],2:[Reference: java.lang.Object],3:[Conflict],4:[32-bit Constant: 1],5:[Uninitialized Reference: java.lang.Object],6:[32-bit Constant: 1],7:[Zero],8:[Reference: ReferenceMap],
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// |001a: +invoke-object-init/range {}, Ljava/lang/Object;.<init>:()V // method@0005
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// 0:[Reference: java.lang.Exception],1:[Reference: java.lang.Object[]],2:[Reference: java.lang.Object],3:[Conflict],4:[32-bit Constant: 1],5:[Reference: java.lang.Object],6:[32-bit Constant: 1],7:[Zero],8:[Reference: ReferenceMap],
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// |001d: aput-object v5, v1, v4
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// 0:[Reference: java.lang.Exception],1:[Reference: java.lang.Object[]],2:[Reference: java.lang.Object],3:[Conflict],4:[32-bit Constant: 2],5:[Conflict],6:[32-bit Constant: 1],7:[Zero],8:[Reference: ReferenceMap],
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// |001f: aput-object v2, v1, v6
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// 0:[Reference: java.lang.Exception],1:[Reference: java.lang.Object[]],2:[Reference: java.lang.Object],3:[Conflict],4:[32-bit Constant: 2],5:[Conflict],6:[32-bit Constant: 1],7:[Zero],8:[Reference: ReferenceMap],
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// |0021: +invoke-virtual-quick {v8, v7}, [000c] // vtable #000c
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// |0024: move-object v3, v2
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// 0:[Reference: java.lang.Exception],1:[Reference: java.lang.Object[]],2:[Reference: java.lang.Object],3:[Reference: java.lang.Object],4:[32-bit Constant: 2],5:[Conflict],6:[32-bit Constant: 1],7:[Zero],8:[Reference: ReferenceMap],
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// |0025: goto 0013 // -0012
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// |0026: move-exception v4
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// 0:[Conflict],1:[Reference: java.lang.Object[]],2:[Reference: java.lang.Object],3:[Conflict],4:[Reference: java.lang.Throwable],5:[Conflict],6:[32-bit Constant: 1],7:[Zero],8:[Reference: ReferenceMap],
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// |0027: aput-object v2, v1, v6
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// 0:[Conflict],1:[Reference: java.lang.Object[]],2:[Reference: java.lang.Object],3:[Conflict],4:[Reference: java.lang.Throwable],5:[Conflict],6:[32-bit Constant: 1],7:[Zero],8:[Reference: ReferenceMap],
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// |0029: +invoke-virtual-quick {v8, v7}, [000c] // vtable #000c
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// 0:[Conflict],1:[Reference: java.lang.Object[]],2:[Reference: java.lang.Object],3:[Conflict],4:[Reference: java.lang.Throwable],5:[Conflict],6:[32-bit Constant: 1],7:[Zero],8:[Reference: ReferenceMap],
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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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// 0:[Unknown],1:[Reference: java.lang.Object[]],2:[Reference: java.lang.Object],3:[Reference: java.lang.Object],4:[Reference: java.lang.Throwable],5:[Unknown],6:[32-bit Constant: 1],7:[Zero],8:[Reference: ReferenceMap],
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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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// 0:[Reference: java.lang.Exception],1:[Reference: java.lang.Object[]],2:[Reference: java.lang.Object],3:[Reference: java.lang.Object],4:[32-bit Constant: 2],5:[Unknown],6:[32-bit Constant: 1],7:[Zero],8:[Reference: ReferenceMap],
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// |0032: goto 0015 // -001d
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// catches : 3
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// 0x0006 - 0x000b
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// Ljava/lang/Exception; -> 0x0014
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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 - 0x001f
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// <any> -> 0x0026
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// positions :
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// 0x0003 line=8
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// 0x0005 line=9
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// 0x0006 line=11
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// 0x000b line=12
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// 0x000e line=18
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// 0x0010 line=19
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// 0x0013 line=21
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// 0x0014 line=13
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// 0x0015 line=14
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// 0x0017 line=15
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// 0x001f line=18
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// 0x0021 line=19
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// 0x0025 line=20
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// 0x0026 line=18
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// 0x0029 line=19
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// 0x002d line=18
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// 0x0030 line=13
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// locals :
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// 0x0006 - 0x000b reg=2 y Ljava/lang/Object;
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// 0x000b - 0x0013 reg=3 y Ljava/lang/Object;
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// 0x0014 - 0x0015 reg=2 y Ljava/lang/Object;
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// 0x0015 - 0x0026 reg=0 ex Ljava/lang/Exception;
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// 0x002d - 0x0032 reg=3 y Ljava/lang/Object;
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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 LReferenceMap;
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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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