forked from OSchip/llvm-project
91 lines
2.8 KiB
C++
91 lines
2.8 KiB
C++
//===-- sanitizer_procmaps_linux.cc ---------------------------------------===//
|
|
//
|
|
// The LLVM Compiler Infrastructure
|
|
//
|
|
// This file is distributed under the University of Illinois Open Source
|
|
// License. See LICENSE.TXT for details.
|
|
//
|
|
//===----------------------------------------------------------------------===//
|
|
//
|
|
// Information about the process mappings (Linux-specific parts).
|
|
//===----------------------------------------------------------------------===//
|
|
|
|
#include "sanitizer_platform.h"
|
|
#if SANITIZER_LINUX
|
|
#include "sanitizer_common.h"
|
|
#include "sanitizer_procmaps.h"
|
|
|
|
namespace __sanitizer {
|
|
|
|
void ReadProcMaps(ProcSelfMapsBuff *proc_maps) {
|
|
CHECK(ReadFileToBuffer("/proc/self/maps", &proc_maps->data,
|
|
&proc_maps->mmaped_size, &proc_maps->len));
|
|
}
|
|
|
|
static bool IsOneOf(char c, char c1, char c2) {
|
|
return c == c1 || c == c2;
|
|
}
|
|
|
|
bool MemoryMappingLayout::Next(uptr *start, uptr *end, uptr *offset,
|
|
char filename[], uptr filename_size,
|
|
uptr *protection) {
|
|
char *last = proc_self_maps_.data + proc_self_maps_.len;
|
|
if (current_ >= last) return false;
|
|
uptr dummy;
|
|
if (!start) start = &dummy;
|
|
if (!end) end = &dummy;
|
|
if (!offset) offset = &dummy;
|
|
if (!protection) protection = &dummy;
|
|
char *next_line = (char*)internal_memchr(current_, '\n', last - current_);
|
|
if (next_line == 0)
|
|
next_line = last;
|
|
// Example: 08048000-08056000 r-xp 00000000 03:0c 64593 /foo/bar
|
|
*start = ParseHex(¤t_);
|
|
CHECK_EQ(*current_++, '-');
|
|
*end = ParseHex(¤t_);
|
|
CHECK_EQ(*current_++, ' ');
|
|
CHECK(IsOneOf(*current_, '-', 'r'));
|
|
*protection = 0;
|
|
if (*current_++ == 'r')
|
|
*protection |= kProtectionRead;
|
|
CHECK(IsOneOf(*current_, '-', 'w'));
|
|
if (*current_++ == 'w')
|
|
*protection |= kProtectionWrite;
|
|
CHECK(IsOneOf(*current_, '-', 'x'));
|
|
if (*current_++ == 'x')
|
|
*protection |= kProtectionExecute;
|
|
CHECK(IsOneOf(*current_, 's', 'p'));
|
|
if (*current_++ == 's')
|
|
*protection |= kProtectionShared;
|
|
CHECK_EQ(*current_++, ' ');
|
|
*offset = ParseHex(¤t_);
|
|
CHECK_EQ(*current_++, ' ');
|
|
ParseHex(¤t_);
|
|
CHECK_EQ(*current_++, ':');
|
|
ParseHex(¤t_);
|
|
CHECK_EQ(*current_++, ' ');
|
|
while (IsDecimal(*current_))
|
|
current_++;
|
|
// Qemu may lack the trailing space.
|
|
// https://github.com/google/sanitizers/issues/160
|
|
// CHECK_EQ(*current_++, ' ');
|
|
// Skip spaces.
|
|
while (current_ < next_line && *current_ == ' ')
|
|
current_++;
|
|
// Fill in the filename.
|
|
uptr i = 0;
|
|
while (current_ < next_line) {
|
|
if (filename && i < filename_size - 1)
|
|
filename[i++] = *current_;
|
|
current_++;
|
|
}
|
|
if (filename && i < filename_size)
|
|
filename[i] = 0;
|
|
current_ = next_line + 1;
|
|
return true;
|
|
}
|
|
|
|
} // namespace __sanitizer
|
|
|
|
#endif // SANITIZER_LINUX
|