compiler-rt/test/tsan/debugging.cpp

   1 // RUN: %clangxx_tsan -O1 %s -o %t
   2 // RUN: %deflake %run %t 2>&1 | FileCheck %s
   3
   4 #include <pthread.h>
   5 #include <stdint.h>
   6 #include <stdio.h>
   7 #include <stdlib.h>
   8 #include <string.h>
   9
  10 #include "test.h"
  11
  12 extern "C" {
  13 void __tsan_on_report(void *report);
  14 void *__tsan_get_current_report();
  15 int __tsan_get_report_data(void *report, const char **description, int *count,
  16                            int *stack_count, int *mop_count, int *loc_count,
  17                            int *mutex_count, int *thread_count,
  18                            int *unique_tid_count, void **sleep_trace,
  19                            unsigned long trace_size);
  20 int __tsan_get_report_mop(void *report, unsigned long idx, int *tid,
  21                           void **addr, int *size, int *write, int *atomic,
  22                           void **trace, unsigned long trace_size);
  23 int __tsan_get_report_thread(void *report, unsigned long idx, int *tid,
  24                              uint64_t *os_id, int *running,
  25                              const char **name, int *parent_tid, void **trace,
  26                              unsigned long trace_size);
  27 }
  28
  29 long my_global;
  30
  31 void *Thread(void *a) {
  32   barrier_wait(&barrier);
  33   my_global = 42;
  34   return NULL;
  35 }
  36
  37 int main() {
  38   barrier_init(&barrier, 2);
  39   fprintf(stderr, "&my_global = %p\n", &my_global);
  40   // CHECK: &my_global = [[GLOBAL:0x[0-9a-f]+]]
  41   pthread_t t;
  42   pthread_create(&t, 0, Thread, 0);
  43   my_global = 41;
  44   barrier_wait(&barrier);
  45   pthread_join(t, 0);
  46   fprintf(stderr, "Done.\n");
  47 }
  48
  49 // Required for dyld macOS 12.0+
  50 #if (__APPLE__)
  51 __attribute__((weak))
  52 #endif
  53 __attribute__((disable_sanitizer_instrumentation))
  54 extern "C" void
  55 __tsan_on_report(void *report) {
  56   fprintf(stderr, "__tsan_on_report(%p)\n", report);
  57   fprintf(stderr, "__tsan_get_current_report() = %p\n",
  58           __tsan_get_current_report());
  59   // CHECK: __tsan_on_report([[REPORT:0x[0-9a-f]+]])
  60   // CHECK: __tsan_get_current_report() = [[REPORT]]
  61
  62   const char *description;
  63   int count;
  64   int stack_count, mop_count, loc_count, mutex_count, thread_count,
  65       unique_tid_count;
  66   void *sleep_trace[16] = {0};
  67   __tsan_get_report_data(report, &description, &count, &stack_count, &mop_count,
  68                          &loc_count, &mutex_count, &thread_count,
  69                          &unique_tid_count, sleep_trace, 16);
  70   fprintf(stderr, "report type = '%s', count = %d\n", description, count);
  71   // CHECK: report type = 'data-race', count = 0
  72
  73   fprintf(stderr, "mop_count = %d\n", mop_count);
  74   // CHECK: mop_count = 2
  75
  76   int tid;
  77   void *addr;
  78   int size, write, atomic;
  79   void *trace[16] = {0};
  80
  81   __tsan_get_report_mop(report, 0, &tid, &addr, &size, &write, &atomic, trace,
  82                         16);
  83   fprintf(stderr, "tid = %d, addr = %p, size = %d, write = %d, atomic = %d\n",
  84           tid, addr, size, write, atomic);
  85   // CHECK: tid = 1, addr = [[GLOBAL]], size = 8, write = 1, atomic = 0
  86   fprintf(stderr, "trace[0] = %p, trace[1] = %p\n", trace[0], trace[1]);
  87   // CHECK: trace[0] = 0x{{[0-9a-f]+}}, trace[1] = {{0x0|\(nil\)|\(null\)}}
  88
  89   __tsan_get_report_mop(report, 1, &tid, &addr, &size, &write, &atomic, trace,
  90                         16);
  91   fprintf(stderr, "tid = %d, addr = %p, size = %d, write = %d, atomic = %d\n",
  92           tid, addr, size, write, atomic);
  93   // CHECK: tid = 0, addr = [[GLOBAL]], size = 8, write = 1, atomic = 0
  94   fprintf(stderr, "trace[0] = %p, trace[1] = %p\n", trace[0], trace[1]);
  95   // CHECK: trace[0] = 0x{{[0-9a-f]+}}, trace[1] = {{0x0|\(nil\)|\(null\)}}
  96
  97   fprintf(stderr, "thread_count = %d\n", thread_count);
  98   // CHECK: thread_count = 2
  99
 100   uint64_t os_id;
 101   int running;
 102   const char *name;
 103   int parent_tid;
 104
 105   __tsan_get_report_thread(report, 0, &tid, &os_id, &running, &name, &parent_tid, trace, 16);
 106   fprintf(stderr, "tid = %d\n", tid);
 107   // CHECK: tid = 1
 108
 109   __tsan_get_report_thread(report, 1, &tid, &os_id, &running, &name, &parent_tid, trace, 16);
 110   fprintf(stderr, "tid = %d\n", tid);
 111   // CHECK: tid = 0
 112 }
 113
 114 // CHECK: Done.
 115 // CHECK: ThreadSanitizer: reported 1 warnings