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 "dex/dex_file_types.h" 21 #include "scoped_thread_state_change-inl.h" 22 #include "thread.h" 23 24 namespace art { 25 26 OatQuickMethodHeader::OatQuickMethodHeader(uint32_t vmap_table_offset, 27 uint32_t method_info_offset, 28 uint32_t frame_size_in_bytes, 29 uint32_t core_spill_mask, 30 uint32_t fp_spill_mask, 31 uint32_t code_size) 32 : vmap_table_offset_(vmap_table_offset), 33 method_info_offset_(method_info_offset), 34 frame_info_(frame_size_in_bytes, core_spill_mask, fp_spill_mask), 35 code_size_(code_size) {} 36 37 OatQuickMethodHeader::~OatQuickMethodHeader() {} 38 39 uint32_t OatQuickMethodHeader::ToDexPc(ArtMethod* method, 40 const uintptr_t pc, 41 bool abort_on_failure) const { 42 const void* entry_point = GetEntryPoint(); 43 uint32_t sought_offset = pc - reinterpret_cast<uintptr_t>(entry_point); 44 if (IsOptimized()) { 45 CodeInfo code_info = GetOptimizedCodeInfo(); 46 CodeInfoEncoding encoding = code_info.ExtractEncoding(); 47 StackMap stack_map = code_info.GetStackMapForNativePcOffset(sought_offset, encoding); 48 if (stack_map.IsValid()) { 49 return stack_map.GetDexPc(encoding.stack_map.encoding); 50 } 51 } else { 52 DCHECK(method->IsNative()); 53 return dex::kDexNoIndex; 54 } 55 if (abort_on_failure) { 56 ScopedObjectAccess soa(Thread::Current()); 57 LOG(FATAL) << "Failed to find Dex offset for PC offset " 58 << reinterpret_cast<void*>(sought_offset) 59 << "(PC " << reinterpret_cast<void*>(pc) << ", entry_point=" << entry_point 60 << " current entry_point=" << method->GetEntryPointFromQuickCompiledCode() 61 << ") in " << method->PrettyMethod(); 62 } 63 return dex::kDexNoIndex; 64 } 65 66 uintptr_t OatQuickMethodHeader::ToNativeQuickPc(ArtMethod* method, 67 const uint32_t dex_pc, 68 bool is_for_catch_handler, 69 bool abort_on_failure) const { 70 const void* entry_point = GetEntryPoint(); 71 DCHECK(!method->IsNative()); 72 DCHECK(IsOptimized()); 73 // Search for the dex-to-pc mapping in stack maps. 74 CodeInfo code_info = GetOptimizedCodeInfo(); 75 CodeInfoEncoding encoding = code_info.ExtractEncoding(); 76 77 // All stack maps are stored in the same CodeItem section, safepoint stack 78 // maps first, then catch stack maps. We use `is_for_catch_handler` to select 79 // the order of iteration. 80 StackMap stack_map = 81 LIKELY(is_for_catch_handler) ? code_info.GetCatchStackMapForDexPc(dex_pc, encoding) 82 : code_info.GetStackMapForDexPc(dex_pc, encoding); 83 if (stack_map.IsValid()) { 84 return reinterpret_cast<uintptr_t>(entry_point) + 85 stack_map.GetNativePcOffset(encoding.stack_map.encoding, kRuntimeISA); 86 } 87 if (abort_on_failure) { 88 ScopedObjectAccess soa(Thread::Current()); 89 LOG(FATAL) << "Failed to find native offset for dex pc 0x" << std::hex << dex_pc 90 << " in " << method->PrettyMethod(); 91 } 92 return UINTPTR_MAX; 93 } 94 95 } // namespace art 96
