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
OatQuickMethodHeader(uint32_t vmap_table_offset,uint32_t frame_size_in_bytes,uint32_t core_spill_mask,uint32_t fp_spill_mask,uint32_t code_size)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
~OatQuickMethodHeader()35 OatQuickMethodHeader::~OatQuickMethodHeader() {}
36
ToDexPc(ArtMethod * method,const uintptr_t pc,bool abort_on_failure) const37 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
ToNativeQuickPc(ArtMethod * method,const uint32_t dex_pc,bool is_for_catch_handler,bool abort_on_failure) const64 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