forked from OSchip/llvm-project
76 lines
2.2 KiB
C++
76 lines
2.2 KiB
C++
//===-- sanitizer_common.cc -----------------------------------------------===//
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//
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// The LLVM Compiler Infrastructure
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//
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// This file is distributed under the University of Illinois Open Source
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// License. See LICENSE.TXT for details.
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//
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//===----------------------------------------------------------------------===//
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//
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// This file is shared between AddressSanitizer and ThreadSanitizer
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// run-time libraries.
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//===----------------------------------------------------------------------===//
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#include "sanitizer_common.h"
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#include "sanitizer_libc.h"
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#include <stdlib.h>
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namespace __sanitizer {
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void RawWrite(const char *buffer) {
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static const char *kRawWriteError = "RawWrite can't output requested buffer!";
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uptr length = (uptr)internal_strlen(buffer);
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if (length != internal_write(2, buffer, length)) {
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internal_write(2, kRawWriteError, internal_strlen(kRawWriteError));
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Die();
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}
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}
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uptr ReadFileToBuffer(const char *file_name, char **buff,
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uptr *buff_size, uptr max_len) {
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const uptr kMinFileLen = kPageSize;
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uptr read_len = 0;
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*buff = 0;
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*buff_size = 0;
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// The files we usually open are not seekable, so try different buffer sizes.
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for (uptr size = kMinFileLen; size <= max_len; size *= 2) {
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fd_t fd = internal_open(file_name, /*write*/ false);
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if (fd == kInvalidFd) return 0;
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UnmapOrDie(*buff, *buff_size);
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*buff = (char*)MmapOrDie(size, __FUNCTION__);
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*buff_size = size;
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// Read up to one page at a time.
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read_len = 0;
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bool reached_eof = false;
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while (read_len + kPageSize <= size) {
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uptr just_read = internal_read(fd, *buff + read_len, kPageSize);
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if (just_read == 0) {
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reached_eof = true;
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break;
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}
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read_len += just_read;
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}
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internal_close(fd);
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if (reached_eof) // We've read the whole file.
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break;
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}
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return read_len;
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}
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static int comp(const void *p1, const void *p2) {
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uptr v1 = *(uptr*)p1;
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uptr v2 = *(uptr*)p2;
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if (v1 < v2)
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return -1;
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else if (v1 > v2)
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return 1;
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else
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return 0;
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}
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void SortArray(uptr *array, uptr size) {
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qsort(array, size, sizeof(array[0]), &comp);
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}
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} // namespace __sanitizer
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