1 /* 2 * Copyright (C) 2011 The Android Open Source Project 3 * 4 * Licensed under the Apache License, Version 2.0 (the "License"); 5 * you may not use this file except in compliance with the License. 6 * You may obtain a copy of the License at 7 * 8 * http://www.apache.org/licenses/LICENSE-2.0 9 * 10 * Unless required by applicable law or agreed to in writing, software 11 * distributed under the License is distributed on an "AS IS" BASIS, 12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 13 * See the License for the specific language governing permissions and 14 * limitations under the License. 15 */ 16 17 #include "oat_quick_method_header.h" 18 19 #include "art_method.h" 20 #include "scoped_thread_state_change-inl.h" 21 #include "thread.h" 22 23 namespace art { 24 25 OatQuickMethodHeader::OatQuickMethodHeader(uint32_t vmap_table_offset, 26 uint32_t method_info_offset, 27 uint32_t frame_size_in_bytes, 28 uint32_t core_spill_mask, 29 uint32_t fp_spill_mask, 30 uint32_t code_size) 31 : vmap_table_offset_(vmap_table_offset), 32 method_info_offset_(method_info_offset), 33 frame_info_(frame_size_in_bytes, core_spill_mask, fp_spill_mask), 34 code_size_(code_size) {} 35 36 OatQuickMethodHeader::~OatQuickMethodHeader() {} 37 38 uint32_t OatQuickMethodHeader::ToDexPc(ArtMethod* method, 39 const uintptr_t pc, 40 bool abort_on_failure) const { 41 const void* entry_point = GetEntryPoint(); 42 uint32_t sought_offset = pc - reinterpret_cast<uintptr_t>(entry_point); 43 if (IsOptimized()) { 44 CodeInfo code_info = GetOptimizedCodeInfo(); 45 CodeInfoEncoding encoding = code_info.ExtractEncoding(); 46 StackMap stack_map = code_info.GetStackMapForNativePcOffset(sought_offset, encoding); 47 if (stack_map.IsValid()) { 48 return stack_map.GetDexPc(encoding.stack_map.encoding); 49 } 50 } else { 51 DCHECK(method->IsNative()); 52 return DexFile::kDexNoIndex; 53 } 54 if (abort_on_failure) { 55 ScopedObjectAccess soa(Thread::Current()); 56 LOG(FATAL) << "Failed to find Dex offset for PC offset " 57 << reinterpret_cast<void*>(sought_offset) 58 << "(PC " << reinterpret_cast<void*>(pc) << ", entry_point=" << entry_point 59 << " current entry_point=" << method->GetEntryPointFromQuickCompiledCode() 60 << ") in " << method->PrettyMethod(); 61 } 62 return DexFile::kDexNoIndex; 63 } 64 65 uintptr_t OatQuickMethodHeader::ToNativeQuickPc(ArtMethod* method, 66 const uint32_t dex_pc, 67 bool is_for_catch_handler, 68 bool abort_on_failure) const { 69 const void* entry_point = GetEntryPoint(); 70 DCHECK(!method->IsNative()); 71 DCHECK(IsOptimized()); 72 // Search for the dex-to-pc mapping in stack maps. 73 CodeInfo code_info = GetOptimizedCodeInfo(); 74 CodeInfoEncoding encoding = code_info.ExtractEncoding(); 75 76 // All stack maps are stored in the same CodeItem section, safepoint stack 77 // maps first, then catch stack maps. We use `is_for_catch_handler` to select 78 // the order of iteration. 79 StackMap stack_map = 80 LIKELY(is_for_catch_handler) ? code_info.GetCatchStackMapForDexPc(dex_pc, encoding) 81 : code_info.GetStackMapForDexPc(dex_pc, encoding); 82 if (stack_map.IsValid()) { 83 return reinterpret_cast<uintptr_t>(entry_point) + 84 stack_map.GetNativePcOffset(encoding.stack_map.encoding, kRuntimeISA); 85 } 86 if (abort_on_failure) { 87 ScopedObjectAccess soa(Thread::Current()); 88 LOG(FATAL) << "Failed to find native offset for dex pc 0x" << std::hex << dex_pc 89 << " in " << method->PrettyMethod(); 90 } 91 return UINTPTR_MAX; 92 } 93 94 } // namespace art 95
