File: user_malloc.cpp

package info (click to toggle)
llvm-toolchain-18 1%3A18.1.8-18
  • links: PTS, VCS
  • area: main
  • in suites: forky, sid, trixie
  • size: 1,908,340 kB
  • sloc: cpp: 6,667,937; ansic: 1,440,452; asm: 883,619; python: 230,549; objc: 76,880; f90: 74,238; lisp: 35,989; pascal: 16,571; sh: 10,229; perl: 7,459; ml: 5,047; awk: 3,523; makefile: 2,987; javascript: 2,149; xml: 892; fortran: 649; cs: 573
file content (35 lines) | stat: -rw-r--r-- 745 bytes parent folder | download | duplicates (38) 
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
32
33
34
35
 
// RUN: %clangxx_tsan -c -O1 -fno-sanitize=thread %s -o %t.o
// RUN: %clangxx_tsan -O1 %s %t.o -o %t && %run %t 2>&1 | FileCheck %s

#include <stdio.h>
#include <stdlib.h>

#if !__has_feature(thread_sanitizer)

// Defined by tsan.
extern "C" void *__interceptor_malloc(unsigned long size);
extern "C" void __interceptor_free(void *p);
extern "C" void *malloc(unsigned long size) {
  static int first = 0;
  if (__sync_lock_test_and_set(&first, 1) == 0)
    fprintf(stderr, "user malloc\n");
  return __interceptor_malloc(size);
}

extern "C" void free(void *p) {
  __interceptor_free(p);
}

#else

int main() {
  volatile char *p = (char*)malloc(10);
  p[0] = 0;
  free((void*)p);
}

#endif

// CHECK: user malloc
// CHECK-NOT: ThreadSanitizer