1/*
2 * Copyright (C) 2013 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 _LIBBACKTRACE_UNWIND_CURRENT_H
18#define _LIBBACKTRACE_UNWIND_CURRENT_H
19
20#include <stdint.h>
21#include <sys/types.h>
22#include <ucontext.h>
23
24#include <string>
25
26#include <backtrace/Backtrace.h>
27#include <backtrace/BacktraceMap.h>
28
29#include "BacktraceCurrent.h"
30
31#define UNW_LOCAL_ONLY
32#include <libunwind.h>
33
34class UnwindCurrent : public BacktraceCurrent {
35public:
36  UnwindCurrent(pid_t pid, pid_t tid, BacktraceMap* map) : BacktraceCurrent(pid, tid, map) {}
37  virtual ~UnwindCurrent() {}
38
39  std::string GetFunctionNameRaw(uintptr_t pc, uintptr_t* offset) override;
40
41private:
42  void GetUnwContextFromUcontext(const ucontext_t* ucontext);
43
44  bool UnwindFromContext(size_t num_ignore_frames, ucontext_t* ucontext) override;
45
46  unw_context_t context_;
47};
48
49#endif // _LIBBACKTRACE_UNWIND_CURRENT_H
50