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//===-- asan_process.h ------------------------------------------*- C++ -*-===//
//
// The LLVM Compiler Infrastructure
//
// This file is distributed under the University of Illinois Open Source
// License. See LICENSE.TXT for details.
//
//===----------------------------------------------------------------------===//
//
// This file is a part of AddressSanitizer, an address sanity checker.
//
// Information about the process mappings.
//===----------------------------------------------------------------------===//
#ifndef ASAN_PROCMAPS_H
#define ASAN_PROCMAPS_H
#include "asan_internal.h"
namespace __asan {
class AsanProcMaps {
public:
AsanProcMaps();
bool Next(uintptr_t *start, uintptr_t *end, uintptr_t *offset,
char filename[], size_t filename_size);
void Reset();
// Gets the object file name and the offset in that object for a given
// address 'addr'. Returns true on success.
bool GetObjectNameAndOffset(uintptr_t addr, uintptr_t *offset,
char filename[], size_t filename_size);
~AsanProcMaps();
private:
// Default implementation of GetObjectNameAndOffset.
// Quite slow, because it iterates through the whole process map for each
// lookup.
bool IterateForObjectNameAndOffset(uintptr_t addr, uintptr_t *offset,
char filename[], size_t filename_size) {
Reset();
uintptr_t start, end, file_offset;
for (int i = 0; Next(&start, &end, &file_offset, filename, filename_size);
i++) {
if (addr >= start && addr < end) {
// Don't subtract 'start' for the first entry. Don't ask me why.
*offset = (addr - (i ? start : 0)) + file_offset;
return true;
}
}
if (filename_size)
filename[0] = '\0';
return false;
}
#if defined __linux__
char *proc_self_maps_buff_;
size_t proc_self_maps_buff_mmaped_size_;
size_t proc_self_maps_buff_len_;
char *current_;
#elif defined __APPLE__
template<uint32_t kLCSegment, typename SegmentCommand>
bool NextSegmentLoad(uintptr_t *start, uintptr_t *end, uintptr_t *offset,
char filename[], size_t filename_size);
int current_image_;
uint32_t current_magic_;
int current_load_cmd_count_;
char *current_load_cmd_addr_;
#endif
};
} // namespace __asan
#endif // ASAN_PROCMAPS_H
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