Nicolas Geoffray | 524e7ea | 2015-10-16 17:13:34 +0100 | [diff] [blame] | 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 "mapping_table.h" |
| 21 | #include "scoped_thread_state_change.h" |
| 22 | #include "thread.h" |
| 23 | |
| 24 | namespace art { |
| 25 | |
| 26 | OatQuickMethodHeader::OatQuickMethodHeader( |
| 27 | uint32_t mapping_table_offset, |
| 28 | uint32_t vmap_table_offset, |
| 29 | uint32_t gc_map_offset, |
| 30 | uint32_t frame_size_in_bytes, |
| 31 | uint32_t core_spill_mask, |
| 32 | uint32_t fp_spill_mask, |
| 33 | uint32_t code_size) |
| 34 | : mapping_table_offset_(mapping_table_offset), |
| 35 | vmap_table_offset_(vmap_table_offset), |
| 36 | gc_map_offset_(gc_map_offset), |
| 37 | frame_info_(frame_size_in_bytes, core_spill_mask, fp_spill_mask), |
| 38 | code_size_(code_size) {} |
| 39 | |
| 40 | OatQuickMethodHeader::~OatQuickMethodHeader() {} |
| 41 | |
| 42 | uint32_t OatQuickMethodHeader::ToDexPc(ArtMethod* method, |
| 43 | const uintptr_t pc, |
| 44 | bool abort_on_failure) const { |
| 45 | const void* entry_point = GetEntryPoint(); |
| 46 | uint32_t sought_offset = pc - reinterpret_cast<uintptr_t>(entry_point); |
| 47 | if (IsOptimized()) { |
| 48 | CodeInfo code_info = GetOptimizedCodeInfo(); |
| 49 | StackMapEncoding encoding = code_info.ExtractEncoding(); |
| 50 | StackMap stack_map = code_info.GetStackMapForNativePcOffset(sought_offset, encoding); |
| 51 | if (stack_map.IsValid()) { |
| 52 | return stack_map.GetDexPc(encoding); |
| 53 | } |
| 54 | } else { |
| 55 | MappingTable table(GetMappingTable()); |
| 56 | // NOTE: Special methods (see Mir2Lir::GenSpecialCase()) have an empty mapping |
| 57 | // but they have no suspend checks and, consequently, we never call ToDexPc() for them. |
| 58 | if (table.TotalSize() == 0) { |
| 59 | DCHECK(method->IsNative()); |
| 60 | return DexFile::kDexNoIndex; |
| 61 | } |
| 62 | |
| 63 | // Assume the caller wants a pc-to-dex mapping so check here first. |
| 64 | typedef MappingTable::PcToDexIterator It; |
| 65 | for (It cur = table.PcToDexBegin(), end = table.PcToDexEnd(); cur != end; ++cur) { |
| 66 | if (cur.NativePcOffset() == sought_offset) { |
| 67 | return cur.DexPc(); |
| 68 | } |
| 69 | } |
| 70 | // Now check dex-to-pc mappings. |
| 71 | typedef MappingTable::DexToPcIterator It2; |
| 72 | for (It2 cur = table.DexToPcBegin(), end = table.DexToPcEnd(); cur != end; ++cur) { |
| 73 | if (cur.NativePcOffset() == sought_offset) { |
| 74 | return cur.DexPc(); |
| 75 | } |
| 76 | } |
| 77 | } |
| 78 | if (abort_on_failure) { |
| 79 | ScopedObjectAccess soa(Thread::Current()); |
| 80 | LOG(FATAL) << "Failed to find Dex offset for PC offset " |
| 81 | << reinterpret_cast<void*>(sought_offset) |
| 82 | << "(PC " << reinterpret_cast<void*>(pc) << ", entry_point=" << entry_point |
| 83 | << " current entry_point=" << method->GetEntryPointFromQuickCompiledCode() |
| 84 | << ") in " << PrettyMethod(method); |
| 85 | } |
| 86 | return DexFile::kDexNoIndex; |
| 87 | } |
| 88 | |
| 89 | uintptr_t OatQuickMethodHeader::ToNativeQuickPc(ArtMethod* method, |
| 90 | const uint32_t dex_pc, |
| 91 | bool is_for_catch_handler, |
| 92 | bool abort_on_failure) const { |
| 93 | const void* entry_point = GetEntryPoint(); |
| 94 | if (IsOptimized()) { |
| 95 | // Optimized code does not have a mapping table. Search for the dex-to-pc |
| 96 | // mapping in stack maps. |
| 97 | CodeInfo code_info = GetOptimizedCodeInfo(); |
| 98 | StackMapEncoding encoding = code_info.ExtractEncoding(); |
| 99 | |
| 100 | // All stack maps are stored in the same CodeItem section, safepoint stack |
| 101 | // maps first, then catch stack maps. We use `is_for_catch_handler` to select |
| 102 | // the order of iteration. |
| 103 | StackMap stack_map = |
| 104 | LIKELY(is_for_catch_handler) ? code_info.GetCatchStackMapForDexPc(dex_pc, encoding) |
| 105 | : code_info.GetStackMapForDexPc(dex_pc, encoding); |
| 106 | if (stack_map.IsValid()) { |
| 107 | return reinterpret_cast<uintptr_t>(entry_point) + stack_map.GetNativePcOffset(encoding); |
| 108 | } |
| 109 | } else { |
| 110 | MappingTable table(GetMappingTable()); |
| 111 | if (table.TotalSize() == 0) { |
| 112 | DCHECK_EQ(dex_pc, 0U); |
| 113 | return 0; // Special no mapping/pc == 0 case |
| 114 | } |
| 115 | // Assume the caller wants a dex-to-pc mapping so check here first. |
| 116 | typedef MappingTable::DexToPcIterator It; |
| 117 | for (It cur = table.DexToPcBegin(), end = table.DexToPcEnd(); cur != end; ++cur) { |
| 118 | if (cur.DexPc() == dex_pc) { |
| 119 | return reinterpret_cast<uintptr_t>(entry_point) + cur.NativePcOffset(); |
| 120 | } |
| 121 | } |
| 122 | // Now check pc-to-dex mappings. |
| 123 | typedef MappingTable::PcToDexIterator It2; |
| 124 | for (It2 cur = table.PcToDexBegin(), end = table.PcToDexEnd(); cur != end; ++cur) { |
| 125 | if (cur.DexPc() == dex_pc) { |
| 126 | return reinterpret_cast<uintptr_t>(entry_point) + cur.NativePcOffset(); |
| 127 | } |
| 128 | } |
| 129 | } |
| 130 | |
| 131 | if (abort_on_failure) { |
| 132 | ScopedObjectAccess soa(Thread::Current()); |
| 133 | LOG(FATAL) << "Failed to find native offset for dex pc 0x" << std::hex << dex_pc |
| 134 | << " in " << PrettyMethod(method); |
| 135 | } |
| 136 | return UINTPTR_MAX; |
| 137 | } |
| 138 | |
| 139 | } // namespace art |