compiler-rt/test/tsan/map32bit.cpp

   1 // RUN: %clangxx_tsan -O1 %s -o %t && %deflake %run %t 2>&1 | FileCheck %s
   2 #include "test.h"
   3 #include <stdint.h>
   4 #include <errno.h>
   5 #include <sys/mman.h>
   6
   7 // Test for issue:
   8 // https://github.com/google/sanitizers/issues/412
   9
  10 // MAP_32BIT flag for mmap is supported only for x86_64.
  11 // XFAIL: target=mips{{.*}}
  12 // XFAIL: target=aarch64{{.*}}
  13 // XFAIL: target=powerpc64{{.*}}
  14 // XFAIL: target=s390x{{.*}}
  15 // XFAIL: target=loongarch64{{.*}}
  16 // XFAIL: target=riscv64{{.*}}
  17
  18 // MAP_32BIT doesn't exist on OS X and NetBSD.
  19 // UNSUPPORTED: darwin,target={{.*netbsd.*}}
  20
  21 void *Thread(void *ptr) {
  22   *(int*)ptr = 42;
  23   barrier_wait(&barrier);
  24   return 0;
  25 }
  26
  27 int main() {
  28   barrier_init(&barrier, 2);
  29   void *ptr = mmap(0, 128 << 10, PROT_READ|PROT_WRITE,
  30       MAP_32BIT|MAP_PRIVATE|MAP_ANONYMOUS, -1, 0);
  31   fprintf(stderr, "ptr=%p\n", ptr);
  32   if (ptr == MAP_FAILED) {
  33     fprintf(stderr, "mmap failed: %d\n", errno);
  34     return 1;
  35   }
  36   if ((uintptr_t)ptr >= (1ull << 32)) {
  37     fprintf(stderr, "ptr is too high\n");
  38     return 1;
  39   }
  40   pthread_t t;
  41   pthread_create(&t, 0, Thread, ptr);
  42   barrier_wait(&barrier);
  43   *(int*)ptr = 42;
  44   pthread_join(t, 0);
  45   munmap(ptr, 128 << 10);
  46   fprintf(stderr, "DONE\n");
  47 }
  48
  49 // CHECK: WARNING: ThreadSanitizer: data race
  50 // CHECK: DONE