86 lines
2.8 KiB
C
86 lines
2.8 KiB
C
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/*
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* Copyright (C) 2013 The Android Open Source Project
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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#ifndef _BACKTRACE_BACKTRACE_H
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#define _BACKTRACE_BACKTRACE_H
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#include <backtrace/backtrace.h>
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#include <string>
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class BacktraceImpl;
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class Backtrace {
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public:
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Backtrace(BacktraceImpl* impl);
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virtual ~Backtrace();
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// Get the current stack trace and store in the backtrace_ structure.
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virtual bool Unwind(size_t num_ignore_frames);
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// Get the function name and offset into the function given the pc.
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// If the string is empty, then no valid function name was found.
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virtual std::string GetFunctionName(uintptr_t pc, uintptr_t* offset);
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// Get the name of the map associated with the given pc. If NULL is returned,
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// then map_start is not set. Otherwise, map_start is the beginning of this
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// map.
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virtual const char* GetMapName(uintptr_t pc, uintptr_t* map_start);
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// Finds the memory map associated with the given ptr.
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virtual const backtrace_map_info_t* FindMapInfo(uintptr_t ptr);
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// Read the data at a specific address.
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virtual bool ReadWord(uintptr_t ptr, uint32_t* out_value) = 0;
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// Create a string representing the formatted line of backtrace information
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// for a single frame.
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virtual std::string FormatFrameData(size_t frame_num);
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pid_t Pid() { return backtrace_.pid; }
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pid_t Tid() { return backtrace_.tid; }
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size_t NumFrames() { return backtrace_.num_frames; }
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const backtrace_t* GetBacktrace() { return &backtrace_; }
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const backtrace_frame_data_t* GetFrame(size_t frame_num) {
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return &backtrace_.frames[frame_num];
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}
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// Create the correct Backtrace object based on what is to be unwound.
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// If pid < 0 or equals the current pid, then the Backtrace object
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// corresponds to the current process.
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// If pid < 0 or equals the current pid and tid >= 0, then the Backtrace
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// object corresponds to a thread in the current process.
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// If pid >= 0 and tid < 0, then the Backtrace object corresponds to a
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// different process.
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// Tracing a thread in a different process is not supported.
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static Backtrace* Create(pid_t pid, pid_t tid);
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protected:
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virtual bool VerifyReadWordArgs(uintptr_t ptr, uint32_t* out_value);
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BacktraceImpl* impl_;
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backtrace_map_info_t* map_info_;
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backtrace_t backtrace_;
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friend class BacktraceImpl;
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};
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#endif // _BACKTRACE_BACKTRACE_H
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