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/*
* Copyright (C) 2014 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 _BACKTRACE_BACKTRACE_MAP_H
#define _BACKTRACE_BACKTRACE_MAP_H
#include <stdint.h>
#ifdef USE_MINGW
// MINGW does not define these constants.
#define PROT_NONE 0
#define PROT_READ 0x1
#define PROT_WRITE 0x2
#define PROT_EXEC 0x4
#else
#include <sys/mman.h>
#endif
#include <deque>
#include <string>
struct backtrace_map_t {
uintptr_t start;
uintptr_t end;
int flags;
std::string name;
};
class BacktraceMap {
public:
static BacktraceMap* Create(pid_t pid);
virtual ~BacktraceMap();
// Get the map data structure for the given address.
const backtrace_map_t* Find(uintptr_t addr);
// The flags returned are the same flags as used by the mmap call.
// The values are PROT_*.
int GetFlags(uintptr_t pc) {
const backtrace_map_t* map = Find(pc);
if (map) {
return map->flags;
}
return PROT_NONE;
}
bool IsReadable(uintptr_t pc) { return GetFlags(pc) & PROT_READ; }
bool IsWritable(uintptr_t pc) { return GetFlags(pc) & PROT_WRITE; }
bool IsExecutable(uintptr_t pc) { return GetFlags(pc) & PROT_EXEC; }
typedef std::deque<backtrace_map_t>::iterator iterator;
iterator begin() { return maps_.begin(); }
iterator end() { return maps_.end(); }
typedef std::deque<backtrace_map_t>::const_iterator const_iterator;
const_iterator begin() const { return maps_.begin(); }
const_iterator end() const { return maps_.end(); }
virtual bool Build();
protected:
BacktraceMap(pid_t pid);
virtual bool ParseLine(const char* line, backtrace_map_t* map);
std::deque<backtrace_map_t> maps_;
pid_t pid_;
};
#endif // _BACKTRACE_BACKTRACE_MAP_H
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