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
23namespace art {
24
25OatQuickMethodHeader::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
35OatQuickMethodHeader::~OatQuickMethodHeader() {}
36
37uint32_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
64uintptr_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