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 "stack_map.h"
23 #include "thread.h"
24
25 namespace art {
26
ToDexPc(ArtMethod * method,const uintptr_t pc,bool abort_on_failure) const27 uint32_t OatQuickMethodHeader::ToDexPc(ArtMethod* method,
28 const uintptr_t pc,
29 bool abort_on_failure) const {
30 const void* entry_point = GetEntryPoint();
31 uint32_t sought_offset = pc - reinterpret_cast<uintptr_t>(entry_point);
32 if (method->IsNative()) {
33 return dex::kDexNoIndex;
34 } else {
35 DCHECK(IsOptimized());
36 CodeInfo code_info(this, CodeInfo::DecodeFlags::InlineInfoOnly);
37 StackMap stack_map = code_info.GetStackMapForNativePcOffset(sought_offset);
38 if (stack_map.IsValid()) {
39 return stack_map.GetDexPc();
40 }
41 }
42 if (abort_on_failure) {
43 ScopedObjectAccess soa(Thread::Current());
44 LOG(FATAL) << "Failed to find Dex offset for PC offset "
45 << reinterpret_cast<void*>(sought_offset)
46 << "(PC " << reinterpret_cast<void*>(pc) << ", entry_point=" << entry_point
47 << " current entry_point=" << method->GetEntryPointFromQuickCompiledCode()
48 << ") in " << method->PrettyMethod();
49 }
50 return dex::kDexNoIndex;
51 }
52
ToNativeQuickPc(ArtMethod * method,const uint32_t dex_pc,bool is_for_catch_handler,bool abort_on_failure) const53 uintptr_t OatQuickMethodHeader::ToNativeQuickPc(ArtMethod* method,
54 const uint32_t dex_pc,
55 bool is_for_catch_handler,
56 bool abort_on_failure) const {
57 const void* entry_point = GetEntryPoint();
58 DCHECK(!method->IsNative());
59 DCHECK(IsOptimized());
60 // Search for the dex-to-pc mapping in stack maps.
61 CodeInfo code_info(this, CodeInfo::DecodeFlags::InlineInfoOnly);
62
63 // All stack maps are stored in the same CodeItem section, safepoint stack
64 // maps first, then catch stack maps. We use `is_for_catch_handler` to select
65 // the order of iteration.
66 StackMap stack_map =
67 LIKELY(is_for_catch_handler) ? code_info.GetCatchStackMapForDexPc(dex_pc)
68 : code_info.GetStackMapForDexPc(dex_pc);
69 if (stack_map.IsValid()) {
70 return reinterpret_cast<uintptr_t>(entry_point) +
71 stack_map.GetNativePcOffset(kRuntimeISA);
72 }
73 if (abort_on_failure) {
74 ScopedObjectAccess soa(Thread::Current());
75 LOG(FATAL) << "Failed to find native offset for dex pc 0x" << std::hex << dex_pc
76 << " in " << method->PrettyMethod();
77 }
78 return UINTPTR_MAX;
79 }
80
81 } // namespace art
82