File: race_on_speculative_load.cpp

package info (click to toggle)
llvm-toolchain-17 1%3A17.0.6-22
  • links: PTS, VCS
  • area: main
  • in suites: 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 (30 lines) | stat: -rw-r--r-- 651 bytes parent folder | download | duplicates (39) 
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
 
// RUN: %clangxx_tsan -O1 %s -o %t && %run %t 2>&1 | FileCheck %s
// Regtest for https://github.com/google/sanitizers/issues/447
// This is a correct program and tsan should not report a race.
#include "test.h"

int g;
__attribute__((noinline))
int foo(int cond) {
  if (cond)
    return g;
  return 0;
}

void *Thread1(void *p) {
  barrier_wait(&barrier);
  long res = foo((long)p);
  return (void*) res;
}

int main() {
  barrier_init(&barrier, 2);
  pthread_t t;
  pthread_create(&t, 0, Thread1, 0);
  g = 1;
  barrier_wait(&barrier);
  pthread_join(t, 0);
  fprintf(stderr, "PASS\n");
  // CHECK-NOT: ThreadSanitizer: data race
  // CHECK: PASS
}