compiler-rt/test/tsan/simple_stack.c

   1 #include "test.h"
   2
   3 int Global;
   4
   5 void __attribute__((noinline)) foo1() {
   6   Global = 42;
   7 }
   8
   9 void __attribute__((noinline)) bar1() {
  10   volatile int tmp = 42; (void)tmp;
  11   foo1();
  12 }
  13
  14 void __attribute__((noinline)) foo2() {
  15   volatile int v = Global; (void)v;
  16 }
  17
  18 void __attribute__((noinline)) bar2() {
  19   volatile int tmp = 42; (void)tmp;
  20   foo2();
  21 }
  22
  23 void *Thread1(void *x) {
  24   barrier_wait(&barrier);
  25   bar1();
  26   return NULL;
  27 }
  28
  29 void *Thread2(void *x) {
  30   bar2();
  31   barrier_wait(&barrier);
  32   return NULL;
  33 }
  34
  35 void __attribute__((noinline)) StartThread(pthread_t *t, void *(*f)(void*)) {
  36   pthread_create(t, NULL, f, NULL);
  37 }
  38
  39 int main() {
  40   barrier_init(&barrier, 2);
  41   pthread_t t[2];
  42   StartThread(&t[0], Thread1);
  43   StartThread(&t[1], Thread2);
  44   pthread_join(t[0], NULL);
  45   pthread_join(t[1], NULL);
  46   return 0;
  47 }
  48
  49 // RUN: %clang_tsan -O1 %s -o %t && %deflake %run %t 2>&1 | FileCheck %s
  50
  51 // Also check that functions instrumentation can be configured by either driver
  52 // or legacy flags:
  53
  54 // RUN: %clangxx_tsan -O1 %s -o %t -fno-sanitize-thread-func-entry-exit && %deflake %run %t 2>&1 \
  55 // RUN:   | FileCheck --check-prefix=CHECK-FUNC-ENTRY-EXIT-OFF %s
  56 // RUN: %clangxx_tsan -O1 %s -o %t -mllvm -tsan-instrument-func-entry-exit=0 && %deflake %run %t 2>&1 \
  57 // RUN:   | FileCheck --check-prefix=CHECK-FUNC-ENTRY-EXIT-OFF %s
  58
  59 // CHECK:      WARNING: ThreadSanitizer: data race
  60 // CHECK-NEXT:   Write of size 4 at {{.*}} by thread T1:
  61 // CHECK-NEXT:     #0 foo1{{.*}} {{.*}}simple_stack.c:6{{(:10)?}} ({{.*}})
  62 // CHECK-NEXT:     #1 bar1{{.*}} {{.*}}simple_stack.c:11{{(:3)?}} ({{.*}})
  63 // CHECK-NEXT:     #2 Thread1{{.*}} {{.*}}simple_stack.c:25{{(:3)?}} ({{.*}})
  64 // CHECK:        Previous read of size 4 at {{.*}} by thread T2:
  65 // CHECK-NEXT:     #0 foo2{{.*}} {{.*}}simple_stack.c:15{{(:20)?}} ({{.*}})
  66 // CHECK-NEXT:     #1 bar2{{.*}} {{.*}}simple_stack.c:20{{(:3)?}} ({{.*}})
  67 // CHECK-NEXT:     #2 Thread2{{.*}} {{.*}}simple_stack.c:30{{(:3)?}} ({{.*}})
  68 // CHECK:        Thread T1 (tid={{.*}}, running) created by main thread at:
  69 // CHECK-NEXT:     #0 pthread_create {{.*}} ({{.*}})
  70 // CHECK-NEXT:     #1 StartThread{{.*}} {{.*}}simple_stack.c:36{{(:3)?}} ({{.*}})
  71 // CHECK-NEXT:     #2 main{{.*}} {{.*}}simple_stack.c:42{{(:3)?}} ({{.*}})
  72 // CHECK:        Thread T2 ({{.*}}) created by main thread at:
  73 // CHECK-NEXT:     #0 pthread_create {{.*}} ({{.*}})
  74 // CHECK-NEXT:     #1 StartThread{{.*}} {{.*}}simple_stack.c:36{{(:3)?}} ({{.*}})
  75 // CHECK-NEXT:     #2 main{{.*}} {{.*}}simple_stack.c:43{{(:3)?}} ({{.*}})
  76
  77 // CHECK-FUNC-ENTRY-EXIT-OFF:      WARNING: ThreadSanitizer: data race
  78 // CHECK-FUNC-ENTRY-EXIT-OFF-NEXT:   Write of size 4 at {{.*}} by thread T1:
  79 // CHECK-FUNC-ENTRY-EXIT-OFF-NEXT:     #0 foo1{{.*}} {{.*}}simple_stack.c:6{{(:10)?}} ({{.*}})
  80 // CHECK-FUNC-ENTRY-EXIT-OFF:        Previous read of size 4 at {{.*}} by thread T2:
  81 // CHECK-FUNC-ENTRY-EXIT-OFF-NEXT:     #0 foo2{{.*}} {{.*}}simple_stack.c:15{{(:20)?}} ({{.*}})
  82 // CHECK-FUNC-ENTRY-EXIT-OFF:        Thread T1 (tid={{.*}}, running) created by main thread at:
  83 // CHECK-FUNC-ENTRY-EXIT-OFF-NEXT:     #0 pthread_create {{.*}} ({{.*}})
  84 // CHECK-FUNC-ENTRY-EXIT-OFF:        Thread T2 ({{.*}}) created by main thread at:
  85 // CHECK-FUNC-ENTRY-EXIT-OFF-NEXT:     #0 pthread_create {{.*}} ({{.*}})