| /* |
| * 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) SHARED_REQUIRES(Locks::mutator_lock_) |
| : CheckReferenceMapVisitor(thread) {} |
| |
| bool VisitFrame() SHARED_REQUIRES(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(0x14U, false, 2); // v2: 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(0x22U, 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 code |
| // |
| // 0000: const/4 v4, #int 2 // #2 |
| // 0001: const/4 v7, #int 0 // #0 |
| // 0002: const/4 v6, #int 1 // #1 |
| // 0003: new-array v1, v4, [Ljava/lang/Object; // type@0007 |
| // 0005: const/4 v2, #int 0 // #0 |
| // 0006: new-instance v3, Ljava/lang/Object; // type@0003 |
| // 0008: invoke-direct {v3}, Ljava/lang/Object;.<init>:()V // method@0004 |
| // 000b: const/4 v4, #int 2 // #2 |
| // 000c: aput-object v3, v1, v4 |
| // 000e: aput-object v3, v1, v6 |
| // 0010: invoke-virtual {v8, v7}, LMain;.refmap:(I)I // method@0003 |
| // 0013: move-object v2, v3 |
| // 0014: return-object v2 |
| // 0015: move-exception v0 |
| // 0016: if-nez v2, 0020 // +000a |
| // 0018: new-instance v4, Ljava/lang/Object; // type@0003 |
| // 001a: invoke-direct {v4}, Ljava/lang/Object;.<init>:()V // method@0004 |
| // 001d: const/4 v5, #int 1 // #1 |
| // 001e: aput-object v4, v1, v5 |
| // 0020: aput-object v2, v1, v6 |
| // 0022: invoke-virtual {v8, v7}, LMain;.refmap:(I)I // method@0003 |
| // 0025: goto 0014 // -0011 |
| // 0026: move-exception v4 |
| // 0027: aput-object v2, v1, v6 |
| // 0029: invoke-virtual {v8, v7}, LMain;.refmap:(I)I // method@0003 |
| // 002c: throw v4 |
| // 002d: move-exception v4 |
| // 002e: move-object v2, v3 |
| // 002f: goto 0027 // -0008 |
| // 0030: move-exception v0 |
| // 0031: move-object v2, v3 |
| // 0032: goto 0016 // -001c |
| // catches : 3 |
| // 0x0006 - 0x000b |
| // Ljava/lang/Exception; -> 0x0015 |
| // <any> -> 0x0026 |
| // 0x000c - 0x000e |
| // Ljava/lang/Exception; -> 0x0030 |
| // <any> -> 0x002d |
| // 0x0018 - 0x0020 |
| // <any> -> 0x0026 |
| // positions : |
| // 0x0003 line=22 |
| // 0x0005 line=23 |
| // 0x0006 line=25 |
| // 0x000b line=26 |
| // 0x000e line=32 |
| // 0x0010 line=33 |
| // 0x0014 line=35 |
| // 0x0015 line=27 |
| // 0x0016 line=28 |
| // 0x0018 line=29 |
| // 0x0020 line=32 |
| // 0x0022 line=33 |
| // 0x0026 line=31 |
| // 0x0027 line=32 |
| // 0x0029 line=33 |
| // 0x002c line=31 |
| // 0x0030 line=27 |
| // locals : |
| // 0x0006 - 0x000b reg=2 y Ljava/lang/Object; |
| // 0x000b - 0x0014 reg=3 y Ljava/lang/Object; |
| // 0x0015 - 0x0016 reg=2 y Ljava/lang/Object; |
| // 0x0016 - 0x0026 reg=0 ex Ljava/lang/Exception; |
| // 0x002d - 0x002f reg=3 y Ljava/lang/Object; |
| // 0x002f - 0x0030 reg=2 y Ljava/lang/Object; |
| // 0x0030 - 0x0032 reg=3 y Ljava/lang/Object; |
| // 0x0031 - 0x0033 reg=0 ex Ljava/lang/Exception; |
| // 0x0005 - 0x0033 reg=1 x [Ljava/lang/Object; |
| // 0x0032 - 0x0033 reg=2 y Ljava/lang/Object; |
| // 0x0000 - 0x0033 reg=8 this LMain; |
| |
| 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 |