compiler-rt/test/tsan/global_race.cpp

   1 // RUN: rm -rf %t-dir
   2 // RUN: mkdir %t-dir
   3
   4 // RUN: %clangxx_tsan -O1 %s -o %t-dir/global_race.cpp.exe && %deflake %run %t-dir/global_race.cpp.exe 2>&1 \
   5 // RUN:   | FileCheck %s
   6
   7 // Also check that memory access instrumentation can be configured by either
   8 // driver or legacy flags:
   9
  10 // RUN: %clangxx_tsan -O1 %s -o %t-dir/global_race.cpp.exe -fno-sanitize-thread-memory-access && not %deflake %run %t-dir/global_race.cpp.exe 2>&1 \
  11 // RUN:   | FileCheck --allow-empty --check-prefix=CHECK-MEMORY-ACCESS-OFF %s
  12 // RUN: %clangxx_tsan -O1 %s -o %t-dir/global_race.cpp.exe -mllvm -tsan-instrument-memory-accesses=0 && not %deflake %run %t-dir/global_race.cpp.exe 2>&1 \
  13 // RUN:   | FileCheck --allow-empty --check-prefix=CHECK-MEMORY-ACCESS-OFF %s
  14
  15 #include "test.h"
  16
  17 int GlobalData[10];
  18
  19 void *Thread(void *a) {
  20   barrier_wait(&barrier);
  21   GlobalData[2] = 42;
  22   return 0;
  23 }
  24
  25 int main() {
  26   barrier_init(&barrier, 2);
  27   print_address("addr=", 1, GlobalData);
  28   pthread_t t;
  29   pthread_create(&t, 0, Thread, 0);
  30   GlobalData[2] = 43;
  31   barrier_wait(&barrier);
  32   pthread_join(t, 0);
  33 }
  34
  35 // CHECK: addr=[[ADDR:0x[0-9,a-f]+]]
  36 // CHECK: WARNING: ThreadSanitizer: data race
  37 // CHECK: Location is global 'GlobalData' {{(of size 40 )?}}at [[ADDR]] (global_race.cpp.exe+0x{{[0-9,a-f]+}})
  38
  39 // CHECK-MEMORY-ACCESS-OFF-NOT: WARNING: ThreadSanitizer: data race