compiler-rt/test/tsan/Darwin/external-swift-debugging.cpp

   1 // RUN: %clangxx_tsan %s -o %t
   2 // RUN: %deflake %run %t 2>&1 | FileCheck %s
   3
   4 #include <thread>
   5
   6 #import "../test.h"
   7
   8
   9 extern "C" {
  10 int __tsan_get_report_data(void *report, const char **description, int *count,
  11                            int *stack_count, int *mop_count, int *loc_count,
  12                            int *mutex_count, int *thread_count,
  13                            int *unique_tid_count, void **sleep_trace,
  14                            unsigned long trace_size);
  15 int __tsan_get_report_tag(void *report, unsigned long *tag);
  16 }
  17
  18 __attribute__((no_sanitize("thread"), noinline))
  19 void ExternalWrite(void *addr) {
  20   void *kSwiftAccessRaceTag = (void *)0x1;
  21   __tsan_external_write(addr, nullptr, kSwiftAccessRaceTag);
  22 }
  23
  24 int main(int argc, char *argv[]) {
  25   barrier_init(&barrier, 2);
  26   fprintf(stderr, "Start.\n");
  27   // CHECK: Start.
  28
  29   void *opaque_object = malloc(16);
  30   std::thread t1([opaque_object] {
  31     ExternalWrite(opaque_object);
  32     barrier_wait(&barrier);
  33   });
  34   std::thread t2([opaque_object] {
  35     barrier_wait(&barrier);
  36     ExternalWrite(opaque_object);
  37   });
  38   // CHECK: WARNING: ThreadSanitizer: Swift access race
  39   // CHECK: Modifying access of Swift variable at {{.*}} by thread {{.*}}
  40   // CHECK: Previous modifying access of Swift variable at {{.*}} by thread {{.*}}
  41   // CHECK: SUMMARY: ThreadSanitizer: Swift access race
  42   t1.join();
  43   t2.join();
  44
  45   fprintf(stderr, "Done.\n");
  46 }
  47
  48 extern "C" __attribute__((disable_sanitizer_instrumentation)) void
  49 __tsan_on_report(void *report) {
  50   const char *description;
  51   int count;
  52   int stack_count, mop_count, loc_count, mutex_count, thread_count,
  53       unique_tid_count;
  54   void *sleep_trace[16] = {0};
  55   __tsan_get_report_data(report, &description, &count, &stack_count, &mop_count,
  56                          &loc_count, &mutex_count, &thread_count,
  57                          &unique_tid_count, sleep_trace, 16);
  58   fprintf(stderr, "report type = '%s', count = %d\n", description, count);
  59   // CHECK: report type = 'external-race', count = 0
  60
  61   unsigned long tag;
  62   __tsan_get_report_tag(report, &tag);
  63   fprintf(stderr, "tag = %ld\n", tag);
  64   // CHECK: tag = 1
  65 }
  66
  67 // CHECK: Done.
  68 // CHECK: ThreadSanitizer: reported 1 warnings