60 lines
1.9 KiB
C++
60 lines
1.9 KiB
C++
//===-- sanitizer_common.cc -----------------------------------------------===//
|
|
//
|
|
// The LLVM Compiler Infrastructure
|
|
//
|
|
// This file is distributed under the University of Illinois Open Source
|
|
// License. See LICENSE.TXT for details.
|
|
//
|
|
//===----------------------------------------------------------------------===//
|
|
//
|
|
// This file is shared between AddressSanitizer and ThreadSanitizer
|
|
// run-time libraries.
|
|
//===----------------------------------------------------------------------===//
|
|
|
|
#include "sanitizer_common.h"
|
|
#include "sanitizer_libc.h"
|
|
|
|
namespace __sanitizer {
|
|
|
|
void RawWrite(const char *buffer) {
|
|
static const char *kRawWriteError = "RawWrite can't output requested buffer!";
|
|
uptr length = (uptr)internal_strlen(buffer);
|
|
if (length != internal_write(2, buffer, length)) {
|
|
internal_write(2, kRawWriteError, internal_strlen(kRawWriteError));
|
|
Die();
|
|
}
|
|
}
|
|
|
|
uptr ReadFileToBuffer(const char *file_name, char **buff,
|
|
uptr *buff_size, uptr max_len) {
|
|
const uptr kMinFileLen = kPageSize;
|
|
uptr read_len = 0;
|
|
*buff = 0;
|
|
*buff_size = 0;
|
|
// The files we usually open are not seekable, so try different buffer sizes.
|
|
for (uptr size = kMinFileLen; size <= max_len; size *= 2) {
|
|
fd_t fd = internal_open(file_name, /*write*/ false);
|
|
if (fd == kInvalidFd) return 0;
|
|
UnmapOrDie(*buff, *buff_size);
|
|
*buff = (char*)MmapOrDie(size, __FUNCTION__);
|
|
*buff_size = size;
|
|
// Read up to one page at a time.
|
|
read_len = 0;
|
|
bool reached_eof = false;
|
|
while (read_len + kPageSize <= size) {
|
|
uptr just_read = internal_read(fd, *buff + read_len, kPageSize);
|
|
if (just_read == 0) {
|
|
reached_eof = true;
|
|
break;
|
|
}
|
|
read_len += just_read;
|
|
}
|
|
internal_close(fd);
|
|
if (reached_eof) // We've read the whole file.
|
|
break;
|
|
}
|
|
return read_len;
|
|
}
|
|
|
|
} // namespace __sanitizer
|