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/*
* 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 "perf_regs.h"
#include "thread_tree.h"
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;
};
class OfflineUnwinder {
public:
static std::unique_ptr<OfflineUnwinder> Create(bool collect_stat);
virtual ~OfflineUnwinder() {}
virtual 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) = 0;
const UnwindingResult& GetUnwindingResult() const {
return unwinding_result_;
}
bool IsCallChainBrokenForIncompleteJITDebugInfo() {
return is_callchain_broken_for_incomplete_jit_debug_info_;
}
protected:
OfflineUnwinder() {}
UnwindingResult unwinding_result_;
bool is_callchain_broken_for_incomplete_jit_debug_info_ = false;
};
} // namespace simpleperf
#endif // SIMPLE_PERF_OFFLINE_UNWINDER_H_
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