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
OatQuickMethodHeader(uint32_t vmap_table_offset,uint32_t method_info_offset,uint32_t frame_size_in_bytes,uint32_t core_spill_mask,uint32_t fp_spill_mask,uint32_t code_size)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
~OatQuickMethodHeader()36 OatQuickMethodHeader::~OatQuickMethodHeader() {}
37
ToDexPc(ArtMethod * method,const uintptr_t pc,bool abort_on_failure) const38 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
ToNativeQuickPc(ArtMethod * method,const uint32_t dex_pc,bool is_for_catch_handler,bool abort_on_failure) const65 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