File: SanCovDump.cpp

package info (click to toggle)
llvm-toolchain-17 1%3A17.0.6-22
  • links: PTS, VCS
  • area: main
  • in suites: forky, sid, trixie
  • size: 1,799,624 kB
  • sloc: cpp: 6,428,607; ansic: 1,383,196; asm: 793,408; python: 223,504; objc: 75,364; f90: 60,502; lisp: 33,869; pascal: 15,282; sh: 9,684; perl: 7,453; ml: 4,937; awk: 3,523; makefile: 2,889; javascript: 2,149; xml: 888; fortran: 619; cs: 573
file content (31 lines) | stat: -rw-r--r-- 984 bytes parent folder | download | duplicates (19) 
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
 
// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
// See https://llvm.org/LICENSE.txt for license information.
// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception

// Link this tiny library to a binary compiled with
// -fsanitize-coverage=inline-8bit-counters.
// When passed SANCOV_OUT=OUTPUT_PATH, the process will
// dump the 8-bit coverage counters to the file, assuming
// the regular exit() is called.
//
// See OutOfProcessFuzzTarget.cpp for usage.
#include <stdio.h>
#include <stdlib.h>

static char *CovStart, *CovEnd;

static void DumpCoverage() {
  if (const char *DumpPath = getenv("SANCOV_OUT")) {
    fprintf(stderr, "SanCovDump: %p %p %s\n", CovStart, CovEnd, DumpPath);
    if (FILE *f = fopen(DumpPath, "w")) {
      fwrite(CovStart, 1, CovEnd - CovStart, f);
      fclose(f);
    }
  }
}

extern "C" void __sanitizer_cov_8bit_counters_init(char *Start, char *End) {
  CovStart = Start;
  CovEnd = End;
  atexit(DumpCoverage);
}