1/*
2 * Copyright (C) 2016 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#ifndef _LIBUNWINDSTACK_TESTS_REGS_FAKE_H
18#define _LIBUNWINDSTACK_TESTS_REGS_FAKE_H
19
20#include <stdint.h>
21
22#include <unwindstack/Elf.h>
23#include <unwindstack/Memory.h>
24#include <unwindstack/Regs.h>
25
26namespace unwindstack {
27
28class RegsFake : public Regs {
29 public:
30  RegsFake(uint16_t total_regs) : Regs(total_regs, Regs::Location(Regs::LOCATION_UNKNOWN, 0)) {}
31  virtual ~RegsFake() = default;
32
33  ArchEnum Arch() override { return fake_arch_; }
34  void* RawData() override { return nullptr; }
35  uint64_t pc() override { return fake_pc_; }
36  uint64_t sp() override { return fake_sp_; }
37  void set_pc(uint64_t pc) override { fake_pc_ = pc; }
38  void set_sp(uint64_t sp) override { fake_sp_ = sp; }
39
40  bool SetPcFromReturnAddress(Memory*) override {
41    if (!fake_return_address_valid_) {
42      return false;
43    }
44    fake_pc_ = fake_return_address_;
45    return true;
46  }
47
48  void IterateRegisters(std::function<void(const char*, uint64_t)>) override {}
49
50  bool Is32Bit() { return false; }
51
52  uint64_t GetPcAdjustment(uint64_t, Elf*) override { return 2; }
53
54  bool StepIfSignalHandler(uint64_t, Elf*, Memory*) override { return false; }
55
56  void FakeSetArch(ArchEnum arch) { fake_arch_ = arch; }
57  void FakeSetDexPc(uint64_t dex_pc) { dex_pc_ = dex_pc; }
58  void FakeSetReturnAddress(uint64_t return_address) { fake_return_address_ = return_address; }
59  void FakeSetReturnAddressValid(bool valid) { fake_return_address_valid_ = valid; }
60
61  Regs* Clone() override { return nullptr; }
62
63 private:
64  ArchEnum fake_arch_ = ARCH_UNKNOWN;
65  uint64_t fake_pc_ = 0;
66  uint64_t fake_sp_ = 0;
67  bool fake_return_address_valid_ = false;
68  uint64_t fake_return_address_ = 0;
69};
70
71template <typename TypeParam>
72class RegsImplFake : public RegsImpl<TypeParam> {
73 public:
74  RegsImplFake(uint16_t total_regs)
75      : RegsImpl<TypeParam>(total_regs, Regs::Location(Regs::LOCATION_UNKNOWN, 0)) {}
76  virtual ~RegsImplFake() = default;
77
78  ArchEnum Arch() override { return ARCH_UNKNOWN; }
79  uint64_t pc() override { return fake_pc_; }
80  uint64_t sp() override { return fake_sp_; }
81  void set_pc(uint64_t pc) override { fake_pc_ = pc; }
82  void set_sp(uint64_t sp) override { fake_sp_ = sp; }
83
84  uint64_t GetPcAdjustment(uint64_t, Elf*) override { return 0; }
85  bool SetPcFromReturnAddress(Memory*) override { return false; }
86  bool StepIfSignalHandler(uint64_t, Elf*, Memory*) override { return false; }
87
88  Regs* Clone() override { return nullptr; }
89
90 private:
91  uint64_t fake_pc_ = 0;
92  uint64_t fake_sp_ = 0;
93};
94
95}  // namespace unwindstack
96
97#endif  // _LIBUNWINDSTACK_TESTS_REGS_FAKE_H
98