| /* |
| * Copyright (C) 2011 The Android Open Source Project |
| * |
| * Licensed under the Apache License, Version 2.0 (the "License"); |
| * you may not use this file except in compliance with the License. |
| * You may obtain a copy of the License at |
| * |
| * http://www.apache.org/licenses/LICENSE-2.0 |
| * |
| * Unless required by applicable law or agreed to in writing, software |
| * distributed under the License is distributed on an "AS IS" BASIS, |
| * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
| * See the License for the specific language governing permissions and |
| * limitations under the License. |
| */ |
| |
| #include "art_method-inl.h" |
| #include "check_reference_map_visitor.h" |
| #include "jni.h" |
| |
| namespace art { |
| |
| #define CHECK_REGS_CONTAIN_REFS(dex_pc, abort_if_not_found, ...) do { \ |
| int t[] = {__VA_ARGS__}; \ |
| int t_size = sizeof(t) / sizeof(*t); \ |
| const OatQuickMethodHeader* method_header = GetCurrentOatQuickMethodHeader(); \ |
| uintptr_t native_quick_pc = method_header->ToNativeQuickPc(GetMethod(), \ |
| dex_pc, \ |
| /* is_catch_handler */ false, \ |
| abort_if_not_found); \ |
| if (native_quick_pc != UINTPTR_MAX) { \ |
| CheckReferences(t, t_size, method_header->NativeQuickPcOffset(native_quick_pc)); \ |
| } \ |
| } while (false); |
| |
| struct ReferenceMap2Visitor : public CheckReferenceMapVisitor { |
| explicit ReferenceMap2Visitor(Thread* thread) REQUIRES_SHARED(Locks::mutator_lock_) |
| : CheckReferenceMapVisitor(thread) {} |
| |
| bool VisitFrame() override REQUIRES_SHARED(Locks::mutator_lock_) { |
| if (CheckReferenceMapVisitor::VisitFrame()) { |
| return true; |
| } |
| ArtMethod* m = GetMethod(); |
| std::string m_name(m->GetName()); |
| |
| // Given the method name and the number of times the method has been called, |
| // we know the Dex registers with live reference values. Assert that what we |
| // find is what is expected. |
| if (m_name.compare("f") == 0) { |
| CHECK_REGS_CONTAIN_REFS(0x03U, true, 8); // v8: this |
| CHECK_REGS_CONTAIN_REFS(0x06U, true, 8, 1); // v8: this, v1: x |
| CHECK_REGS_CONTAIN_REFS(0x0cU, true, 8, 3, 1); // v8: this, v3: y, v1: x |
| CHECK_REGS_CONTAIN_REFS(0x10U, true, 8, 3, 1); // v8: this, v3: y, v1: x |
| // v2 is added because of the instruction at DexPC 0024. Object merges with 0 is Object. See: |
| // 0024: move-object v3, v2 |
| // 0025: goto 0013 |
| // Detailed dex instructions for ReferenceMap.java are at the end of this function. |
| // CHECK_REGS_CONTAIN_REFS(8, 3, 2, 1); // v8: this, v3: y, v2: y, v1: x |
| // We eliminate the non-live registers at a return, so only v3 is live. |
| // Note that it is OK for a compiler to not have a dex map at this dex PC because |
| // a return is not necessarily a safepoint. |
| CHECK_REGS_CONTAIN_REFS(0x13U, false, 3); // v3: y |
| // Note that v0: ex can be eliminated because it's a dead merge of two different exceptions. |
| CHECK_REGS_CONTAIN_REFS(0x18U, true, 8, 2, 1); // v8: this, v2: y, v1: x (dead v0: ex) |
| CHECK_REGS_CONTAIN_REFS(0x21U, true, 8, 2, 1); // v8: this, v2: y, v1: x (dead v0: ex) |
| |
| if (!GetCurrentOatQuickMethodHeader()->IsOptimized()) { |
| CHECK_REGS_CONTAIN_REFS(0x27U, true, 8, 4, 2, 1); // v8: this, v4: ex, v2: y, v1: x |
| } |
| CHECK_REGS_CONTAIN_REFS(0x29U, true, 8, 4, 2, 1); // v8: this, v4: ex, v2: y, v1: x |
| CHECK_REGS_CONTAIN_REFS(0x2cU, true, 8, 4, 2, 1); // v8: this, v4: ex, v2: y, v1: x |
| // Note that it is OK for a compiler to not have a dex map at these two dex PCs because |
| // a goto is not necessarily a safepoint. |
| CHECK_REGS_CONTAIN_REFS(0x2fU, false, 8, 4, 3, 2, 1); // v8: this, v4: ex, v3: y, v2: y, v1: x |
| CHECK_REGS_CONTAIN_REFS(0x32U, false, 8, 3, 2, 1, 0); // v8: this, v3: y, v2: y, v1: x, v0: ex |
| } |
| |
| return true; |
| } |
| }; |
| |
| // Dex instructions for the function 'f' in ReferenceMap.java |
| // Virtual methods - |
| // #0 : (in LReferenceMap;) |
| // name : 'f' |
| // type : '()Ljava/lang/Object;' |
| // access : 0x0000 () |
| // code - |
| // registers : 9 |
| // ins : 1 |
| // outs : 2 |
| // insns size : 51 16-bit code units |
| // |[0001e8] ReferenceMap.f:()Ljava/lang/Object; |
| // |0000: const/4 v4, #int 2 // #2 |
| // |0001: const/4 v7, #int 0 // #0 |
| // |0002: const/4 v6, #int 1 // #1 |
| // |
| // 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], |
| // |0003: new-array v1, v4, [Ljava/lang/Object; // type@0007 |
| // |0005: const/4 v2, #int 0 // #0 |
| |
| // 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], |
| // |0006: new-instance v3, Ljava/lang/Object; // type@0003 |
| |
| // [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], |
| // |0008: +invoke-object-init/range {}, Ljava/lang/Object;.<init>:()V // method@0005 |
| // |000b: const/4 v4, #int 2 // #2 |
| |
| // 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], |
| // |000c: aput-object v3, v1, v4 |
| |
| // 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], |
| // |000e: aput-object v3, v1, v6 |
| |
| // 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], |
| // |0010: +invoke-virtual-quick {v8, v7}, [000c] // vtable #000c |
| |
| // 0:[Conflict],1:[Conflict],2:[Conflict],3:[Reference: java.lang.Object],4:[Conflict],5:[Conflict],6:[Conflict],7:[Conflict],8:[Conflict], |
| // |0013: return-object v3 |
| // |0014: move-exception v0 |
| |
| // 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], |
| // |0015: if-nez v2, 001f // +000a |
| // |0017: const/4 v4, #int 1 // #1 |
| |
| // 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], |
| // |0018: new-instance v5, Ljava/lang/Object; // type@0003 |
| |
| // 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], |
| // |001a: +invoke-object-init/range {}, Ljava/lang/Object;.<init>:()V // method@0005 |
| |
| // 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], |
| // |001d: aput-object v5, v1, v4 |
| |
| // 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], |
| // |001f: aput-object v2, v1, v6 |
| |
| // 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], |
| // |0021: +invoke-virtual-quick {v8, v7}, [000c] // vtable #000c |
| // |0024: move-object v3, v2 |
| |
| // 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], |
| // |0025: goto 0013 // -0012 |
| // |0026: move-exception v4 |
| |
| // 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], |
| // |0027: aput-object v2, v1, v6 |
| |
| // 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], |
| // |0029: +invoke-virtual-quick {v8, v7}, [000c] // vtable #000c |
| |
| // 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], |
| // |002c: throw v4 |
| // |002d: move-exception v4 |
| // |002e: move-object v2, v3 |
| |
| // 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], |
| // |002f: goto 0027 // -0008 |
| // |0030: move-exception v0 |
| // |0031: move-object v2, v3 |
| |
| // 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], |
| // |0032: goto 0015 // -001d |
| // catches : 3 |
| // 0x0006 - 0x000b |
| // Ljava/lang/Exception; -> 0x0014 |
| // <any> -> 0x0026 |
| // 0x000c - 0x000e |
| // Ljava/lang/Exception; -> 0x0030 |
| // <any> -> 0x002d |
| // 0x0018 - 0x001f |
| // <any> -> 0x0026 |
| // positions : |
| // 0x0003 line=8 |
| // 0x0005 line=9 |
| // 0x0006 line=11 |
| // 0x000b line=12 |
| // 0x000e line=18 |
| // 0x0010 line=19 |
| // 0x0013 line=21 |
| // 0x0014 line=13 |
| // 0x0015 line=14 |
| // 0x0017 line=15 |
| // 0x001f line=18 |
| // 0x0021 line=19 |
| // 0x0025 line=20 |
| // 0x0026 line=18 |
| // 0x0029 line=19 |
| // 0x002d line=18 |
| // 0x0030 line=13 |
| // locals : |
| // 0x0006 - 0x000b reg=2 y Ljava/lang/Object; |
| // 0x000b - 0x0013 reg=3 y Ljava/lang/Object; |
| // 0x0014 - 0x0015 reg=2 y Ljava/lang/Object; |
| // 0x0015 - 0x0026 reg=0 ex Ljava/lang/Exception; |
| // 0x002d - 0x0032 reg=3 y Ljava/lang/Object; |
| // 0x0005 - 0x0033 reg=1 x [Ljava/lang/Object; |
| // 0x0032 - 0x0033 reg=2 y Ljava/lang/Object; |
| // 0x0000 - 0x0033 reg=8 this LReferenceMap; |
| |
| extern "C" JNIEXPORT jint JNICALL Java_Main_refmap(JNIEnv*, jobject, jint count) { |
| // Visitor |
| ScopedObjectAccess soa(Thread::Current()); |
| ReferenceMap2Visitor mapper(soa.Self()); |
| mapper.WalkStack(); |
| |
| return count + 1; |
| } |
| |
| } // namespace art |