1/*
2 * Copyright (C) 2017 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 <stdint.h>
18
19#include <deque>
20#include <string>
21
22#include <unwindstack/Elf.h>
23#include <unwindstack/ElfInterface.h>
24#include <unwindstack/Memory.h>
25#include <unwindstack/Regs.h>
26
27#include "ElfFake.h"
28#include "RegsFake.h"
29
30namespace unwindstack {
31
32std::deque<FunctionData> ElfInterfaceFake::functions_;
33std::deque<StepData> ElfInterfaceFake::steps_;
34
35bool ElfInterfaceFake::GetFunctionName(uint64_t, uint64_t, std::string* name, uint64_t* offset) {
36  if (functions_.empty()) {
37    return false;
38  }
39  auto entry = functions_.front();
40  functions_.pop_front();
41  *name = entry.name;
42  *offset = entry.offset;
43  return true;
44}
45
46bool ElfInterfaceFake::GetGlobalVariable(const std::string& global, uint64_t* offset) {
47  auto entry = globals_.find(global);
48  if (entry == globals_.end()) {
49    return false;
50  }
51  *offset = entry->second;
52  return true;
53}
54
55bool ElfInterfaceFake::Step(uint64_t, uint64_t, Regs* regs, Memory*, bool* finished) {
56  if (steps_.empty()) {
57    return false;
58  }
59  auto entry = steps_.front();
60  steps_.pop_front();
61
62  if (entry.pc == 0 && entry.sp == 0 && !entry.finished) {
63    // Pretend as though there is no frame.
64    return false;
65  }
66
67  RegsFake* fake_regs = reinterpret_cast<RegsFake*>(regs);
68  fake_regs->set_pc(entry.pc);
69  fake_regs->set_sp(entry.sp);
70  *finished = entry.finished;
71  return true;
72}
73
74}  // namespace unwindstack
75