/*
|
* Copyright (C) 2015 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 SIMPLE_PERF_OFFLINE_UNWINDER_H_
|
#define SIMPLE_PERF_OFFLINE_UNWINDER_H_
|
|
#include <memory>
|
#include <vector>
|
#include <unordered_map>
|
|
#include "perf_regs.h"
|
#include "thread_tree.h"
|
|
#if defined(__linux__)
|
#include <unwindstack/Maps.h>
|
#endif
|
|
namespace simpleperf {
|
struct ThreadEntry;
|
|
struct UnwindingResult {
|
// time used for unwinding, in ns.
|
uint64_t used_time;
|
enum {
|
UNKNOWN_REASON,
|
EXCEED_MAX_FRAMES_LIMIT,
|
ACCESS_REG_FAILED,
|
ACCESS_STACK_FAILED,
|
ACCESS_MEM_FAILED,
|
FIND_PROC_INFO_FAILED,
|
EXECUTE_DWARF_INSTRUCTION_FAILED,
|
DIFFERENT_ARCH,
|
MAP_MISSING,
|
} stop_reason;
|
union {
|
// for ACCESS_REG_FAILED
|
uint64_t regno;
|
// for ACCESS_MEM_FAILED and ACCESS_STACK_FAILED
|
uint64_t addr;
|
} stop_info;
|
uint64_t stack_start;
|
uint64_t stack_end;
|
};
|
|
#if defined(__linux__)
|
class UnwindMaps : public unwindstack::Maps {
|
public:
|
void UpdateMaps(const MapSet& map_set);
|
|
private:
|
uint64_t version_ = 0u;
|
std::vector<const MapEntry*> entries_;
|
};
|
|
class OfflineUnwinder {
|
public:
|
OfflineUnwinder(bool collect_stat);
|
|
bool UnwindCallChain(const ThreadEntry& thread, const RegSet& regs, const char* stack,
|
size_t stack_size, std::vector<uint64_t>* ips, std::vector<uint64_t>* sps);
|
|
bool HasStat() const {
|
return collect_stat_;
|
}
|
|
const UnwindingResult& GetUnwindingResult() const {
|
return unwinding_result_;
|
}
|
|
bool IsCallChainBrokenForIncompleteJITDebugInfo() {
|
return is_callchain_broken_for_incomplete_jit_debug_info_;
|
}
|
|
private:
|
bool collect_stat_;
|
UnwindingResult unwinding_result_;
|
bool is_callchain_broken_for_incomplete_jit_debug_info_;
|
|
std::unordered_map<pid_t, UnwindMaps> cached_maps_;
|
};
|
|
#else // defined(__linux__)
|
|
class OfflineUnwinder {
|
public:
|
OfflineUnwinder(bool) {}
|
bool UnwindCallChain(const ThreadEntry&, const RegSet&, const char*, size_t,
|
std::vector<uint64_t>*, std::vector<uint64_t>*) {
|
return false;
|
}
|
};
|
|
#endif // !defined(__linux__)
|
|
} // namespace simpleperf
|
|
#endif // SIMPLE_PERF_OFFLINE_UNWINDER_H_
|
