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
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)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
~OatQuickMethodHeader()37 OatQuickMethodHeader::~OatQuickMethodHeader() {}
38
ToDexPc(ArtMethod * method,const uintptr_t pc,bool abort_on_failure) const39 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
ToNativeQuickPc(ArtMethod * method,const uint32_t dex_pc,bool is_for_catch_handler,bool abort_on_failure) const66 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