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/*
* Copyright (C) 2022 The Android Open Source Project
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
#ifndef _LIBUNWINDSTACK_ANDROID_UNWINDER_H
#define _LIBUNWINDSTACK_ANDROID_UNWINDER_H
#include <stdint.h>
#include <sys/types.h>
#include <unistd.h>
#include <memory>
#include <mutex>
#include <optional>
#include <string>
#include <utility>
#include <vector>
#include <unwindstack/Arch.h>
#include <unwindstack/DexFiles.h>
#include <unwindstack/Error.h>
#include <unwindstack/JitDebug.h>
#include <unwindstack/Maps.h>
#include <unwindstack/Memory.h>
#include <unwindstack/Regs.h>
#include <unwindstack/SharedString.h>
#include <unwindstack/Unwinder.h>
namespace unwindstack {
struct AndroidUnwinderData {
AndroidUnwinderData() = default;
explicit AndroidUnwinderData(const size_t max_frames) : max_frames(max_frames) {}
explicit AndroidUnwinderData(const bool show_all_frames) : show_all_frames(show_all_frames) {}
void DemangleFunctionNames();
std::string GetErrorString();
std::vector<FrameData> frames;
ErrorData error;
std::optional<std::unique_ptr<Regs>> saved_initial_regs;
const std::optional<size_t> max_frames;
const bool show_all_frames = false;
};
class AndroidUnwinder {
public:
AndroidUnwinder(pid_t pid) : pid_(pid) {}
AndroidUnwinder(pid_t pid, std::shared_ptr<Memory>& memory)
: pid_(pid), process_memory_(memory) {}
AndroidUnwinder(pid_t pid, ArchEnum arch) : pid_(pid), arch_(arch) {}
AndroidUnwinder(pid_t pid, const std::vector<std::string> initial_map_names_to_skip)
: pid_(pid), initial_map_names_to_skip_(std::move(initial_map_names_to_skip)) {}
AndroidUnwinder(pid_t pid, const std::vector<std::string> initial_map_names_to_skip,
const std::vector<std::string> map_suffixes_to_ignore)
: pid_(pid),
initial_map_names_to_skip_(std::move(initial_map_names_to_skip)),
map_suffixes_to_ignore_(std::move(map_suffixes_to_ignore)) {}
virtual ~AndroidUnwinder() = default;
bool Initialize(ErrorData& error);
std::shared_ptr<Memory>& GetProcessMemory() { return process_memory_; }
unwindstack::Maps* GetMaps() { return maps_.get(); }
const JitDebug& GetJitDebug() { return *jit_debug_.get(); }
const DexFiles& GetDexFiles() { return *dex_files_.get(); }
std::string FormatFrame(const FrameData& frame) const;
bool Unwind(AndroidUnwinderData& data);
bool Unwind(std::optional<pid_t> tid, AndroidUnwinderData& data);
bool Unwind(void* ucontext, AndroidUnwinderData& data);
bool Unwind(Regs* initial_regs, AndroidUnwinderData& data);
FrameData BuildFrameFromPcOnly(uint64_t pc);
static AndroidUnwinder* Create(pid_t pid);
protected:
virtual bool InternalInitialize(ErrorData& error) = 0;
virtual bool InternalUnwind(std::optional<pid_t> tid, AndroidUnwinderData& data) = 0;
pid_t pid_;
size_t max_frames_ = kMaxNumFrames;
std::vector<std::string> initial_map_names_to_skip_;
std::vector<std::string> map_suffixes_to_ignore_;
std::once_flag initialize_;
ArchEnum arch_ = ARCH_UNKNOWN;
std::shared_ptr<Maps> maps_;
std::shared_ptr<Memory> process_memory_;
std::unique_ptr<JitDebug> jit_debug_;
std::unique_ptr<DexFiles> dex_files_;
static constexpr size_t kMaxNumFrames = 512;
};
class AndroidLocalUnwinder : public AndroidUnwinder {
public:
AndroidLocalUnwinder() : AndroidUnwinder(getpid()) {
initial_map_names_to_skip_.emplace_back(kUnwindstackLib);
}
AndroidLocalUnwinder(std::shared_ptr<Memory>& process_memory)
: AndroidUnwinder(getpid(), process_memory) {
initial_map_names_to_skip_.emplace_back(kUnwindstackLib);
}
AndroidLocalUnwinder(const std::vector<std::string>& initial_map_names_to_skip)
: AndroidUnwinder(getpid(), initial_map_names_to_skip) {
initial_map_names_to_skip_.emplace_back(kUnwindstackLib);
}
AndroidLocalUnwinder(const std::vector<std::string>& initial_map_names_to_skip,
const std::vector<std::string>& map_suffixes_to_ignore)
: AndroidUnwinder(getpid(), initial_map_names_to_skip, map_suffixes_to_ignore) {
initial_map_names_to_skip_.emplace_back(kUnwindstackLib);
}
virtual ~AndroidLocalUnwinder() = default;
protected:
static constexpr const char* kUnwindstackLib = "libunwindstack.so";
bool InternalInitialize(ErrorData& error) override;
bool InternalUnwind(std::optional<pid_t> tid, AndroidUnwinderData& data) override;
};
class AndroidRemoteUnwinder : public AndroidUnwinder {
public:
AndroidRemoteUnwinder(pid_t pid) : AndroidUnwinder(pid) {}
AndroidRemoteUnwinder(pid_t pid, std::shared_ptr<Memory>& process_memory)
: AndroidUnwinder(pid, process_memory) {}
AndroidRemoteUnwinder(pid_t pid, ArchEnum arch) : AndroidUnwinder(pid, arch) {}
AndroidRemoteUnwinder(pid_t pid, const std::vector<std::string> initial_map_names_to_skip)
: AndroidUnwinder(pid, initial_map_names_to_skip) {}
AndroidRemoteUnwinder(pid_t pid, const std::vector<std::string> initial_map_names_to_skip,
const std::vector<std::string> map_suffixes_to_ignore)
: AndroidUnwinder(pid, initial_map_names_to_skip, map_suffixes_to_ignore) {}
virtual ~AndroidRemoteUnwinder() = default;
protected:
bool InternalInitialize(ErrorData& error) override;
bool InternalUnwind(std::optional<pid_t> tid, AndroidUnwinderData& data) override;
};
} // namespace unwindstack
#endif // _LIBUNWINDSTACK_ANDROID_UNWINDER_H
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