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