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 "arch/instruction_set.h"
20 #include "art_method.h"
21 #include "dex/dex_file_types.h"
22 #include "interpreter/mterp/nterp.h"
23 #include "nterp_helpers.h"
24 #include "scoped_thread_state_change-inl.h"
25 #include "stack_map.h"
26 #include "thread.h"
27
28 namespace art {
29
ToDexPc(ArtMethod ** frame,const uintptr_t pc,bool abort_on_failure) const30 uint32_t OatQuickMethodHeader::ToDexPc(ArtMethod** frame,
31 const uintptr_t pc,
32 bool abort_on_failure) const {
33 ArtMethod* method = *frame;
34 const void* entry_point = GetEntryPoint();
35 uint32_t sought_offset = pc - reinterpret_cast<uintptr_t>(entry_point);
36 if (method->IsNative()) {
37 return dex::kDexNoIndex;
38 } else if (IsNterpMethodHeader()) {
39 return NterpGetDexPC(frame);
40 } else {
41 DCHECK(IsOptimized());
42 CodeInfo code_info = CodeInfo::DecodeInlineInfoOnly(this);
43 StackMap stack_map = code_info.GetStackMapForNativePcOffset(sought_offset);
44 if (stack_map.IsValid()) {
45 return stack_map.GetDexPc();
46 }
47 }
48 if (abort_on_failure) {
49 LOG(FATAL) << "Failed to find Dex offset for PC offset "
50 << reinterpret_cast<void*>(sought_offset)
51 << "(PC " << reinterpret_cast<void*>(pc) << ", entry_point=" << entry_point
52 << " current entry_point=" << method->GetEntryPointFromQuickCompiledCode()
53 << ") in " << method->PrettyMethod();
54 }
55 return dex::kDexNoIndex;
56 }
57
ToNativeQuickPc(ArtMethod * method,const uint32_t dex_pc,bool abort_on_failure) const58 uintptr_t OatQuickMethodHeader::ToNativeQuickPc(ArtMethod* method,
59 const uint32_t dex_pc,
60 bool abort_on_failure) const {
61 const void* entry_point = GetEntryPoint();
62 DCHECK(!method->IsNative());
63 // For catch handlers use the ArrayRef<const uint32_t> version of ToNativeQuickPc.
64 DCHECK(!IsNterpMethodHeader());
65 DCHECK(IsOptimized());
66 // Search for the dex-to-pc mapping in stack maps.
67 CodeInfo code_info = CodeInfo::DecodeInlineInfoOnly(this);
68
69 StackMap stack_map = code_info.GetStackMapForDexPc(dex_pc);
70 if (stack_map.IsValid()) {
71 return reinterpret_cast<uintptr_t>(entry_point) + 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 << " in "
76 << method->PrettyMethod();
77 }
78 return UINTPTR_MAX;
79 }
80
ToNativeQuickPcForCatchHandlers(ArtMethod * method,ArrayRef<const uint32_t> dex_pc_list,uint32_t * stack_map_row,bool abort_on_failure) const81 uintptr_t OatQuickMethodHeader::ToNativeQuickPcForCatchHandlers(
82 ArtMethod* method,
83 ArrayRef<const uint32_t> dex_pc_list,
84 /* out */ uint32_t* stack_map_row,
85 bool abort_on_failure) const {
86 const void* entry_point = GetEntryPoint();
87 DCHECK(!method->IsNative());
88 if (IsNterpMethodHeader()) {
89 return NterpGetCatchHandler();
90 }
91 DCHECK(IsOptimized());
92 // Search for the dex-to-pc mapping in stack maps.
93 CodeInfo code_info = CodeInfo::DecodeInlineInfoOnly(this);
94
95 StackMap stack_map = code_info.GetCatchStackMapForDexPc(dex_pc_list);
96 *stack_map_row = stack_map.Row();
97 if (stack_map.IsValid()) {
98 return reinterpret_cast<uintptr_t>(entry_point) +
99 stack_map.GetNativePcOffset(kRuntimeISA);
100 }
101 if (abort_on_failure) {
102 std::stringstream ss;
103 bool first = true;
104 ss << "Failed to find native offset for dex pcs (from outermost to innermost) " << std::hex;
105 for (auto dex_pc : dex_pc_list) {
106 if (!first) {
107 ss << ", ";
108 }
109 first = false;
110 ss << "0x" << dex_pc;
111 }
112 ScopedObjectAccess soa(Thread::Current());
113 ss << " in " << method->PrettyMethod();
114 LOG(FATAL) << ss.str();
115 }
116 return UINTPTR_MAX;
117 }
118
GetNterpMethodHeader()119 static inline OatQuickMethodHeader* GetNterpMethodHeader() {
120 if (!interpreter::IsNterpSupported()) {
121 return nullptr;
122 }
123 const void* nterp_entrypoint = interpreter::GetNterpEntryPoint();
124 uintptr_t nterp_code_pointer =
125 reinterpret_cast<uintptr_t>(EntryPointToCodePointer(nterp_entrypoint));
126 return reinterpret_cast<OatQuickMethodHeader*>(nterp_code_pointer - sizeof(OatQuickMethodHeader));
127 }
128
129 OatQuickMethodHeader* OatQuickMethodHeader::NterpMethodHeader = GetNterpMethodHeader();
130
IsNterpMethodHeader() const131 bool OatQuickMethodHeader::IsNterpMethodHeader() const {
132 return interpreter::IsNterpSupported() ? (this == NterpMethodHeader) : false;
133 }
134
135 } // namespace art
136