1 // RUN: %clangxx_tsan -O1 %s -o %t && %deflake %run %t | FileCheck %s 2 #include "java.h" 3 #include <memory.h> 4 5 extern "C" __attribute__((disable_sanitizer_instrumentation)) void 6 __tsan_symbolize_external_ex(jptr pc, 7 void (*add_frame)(void *, const char *, 8 const char *, int, int), 9 void *ctx) { 10 if (pc == (1234 | kExternalPCBit)) { 11 add_frame(ctx, "MyInnerFunc", "MyInnerFile.java", 1234, 56); 12 add_frame(ctx, "MyOuterFunc", "MyOuterFile.java", 4321, 65); 13 } 14 if (pc == (2345 | kExternalPCBit)) { 15 add_frame(ctx, "Caller1", "CallerFile.java", 111, 22); 16 add_frame(ctx, "Caller2", "CallerFile.java", 333, 44); 17 } 18 if (pc == (3456 | kExternalPCBit)) { 19 add_frame(ctx, "Allocer1", "Alloc.java", 11, 222); 20 add_frame(ctx, "Allocer2", "Alloc.java", 33, 444); 21 } 22 } 23 24 void *Thread(void *p) { 25 barrier_wait(&barrier); 26 __tsan_func_entry(2345 | kExternalPCBit); 27 __tsan_write1_pc((jptr)p + 16, 1234 | kExternalPCBit); 28 __tsan_func_exit(); 29 return 0; 30 } 31 32 jptr const kHeapSize = 64 * 1024; 33 jptr java_heap[kHeapSize]; 34 35 int main() { 36 barrier_init(&barrier, 2); 37 jptr jheap = (jptr)java_heap; 38 __tsan_java_init(jheap, kHeapSize); 39 const int kBlockSize = 32; 40 __tsan_func_entry(3456 | kExternalPCBit); 41 __tsan_java_alloc(jheap, kBlockSize); 42 print_address("addr:", 2, jheap, jheap + 16); 43 __tsan_func_exit(); 44 pthread_t th; 45 pthread_create(&th, 0, Thread, (void*)jheap); 46 __tsan_func_entry(2345 | kExternalPCBit); 47 __tsan_write1_pc(jheap + 16, 1234 | kExternalPCBit); 48 __tsan_func_exit(); 49 barrier_wait(&barrier); 50 pthread_join(th, 0); 51 __tsan_java_free(jheap, kBlockSize); 52 fprintf(stderr, "DONE\n"); 53 return __tsan_java_fini(); 54 } 55 56 // CHECK: addr:[[BLOCK:0x[0-9,a-f]+]] [[ADDR:0x[0-9,a-f]+]] 57 // CHECK: WARNING: ThreadSanitizer: data race 58 // CHECK: Write of size 1 at [[ADDR]] by thread T1: 59 // CHECK: #0 MyInnerFunc MyInnerFile.java:1234:56 60 // CHECK: #1 MyOuterFunc MyOuterFile.java:4321:65 61 // CHECK: #2 Caller1 CallerFile.java:111:22 62 // CHECK: #3 Caller2 CallerFile.java:333:44 63 // CHECK: Previous write of size 1 at [[ADDR]] by main thread: 64 // CHECK: #0 MyInnerFunc MyInnerFile.java:1234:56 65 // CHECK: #1 MyOuterFunc MyOuterFile.java:4321:65 66 // CHECK: #2 Caller1 CallerFile.java:111:22 67 // CHECK: #3 Caller2 CallerFile.java:333:44 68 // CHECK: Location is heap block of size 32 at [[BLOCK]] allocated by main thread: 69 // CHECK: #0 Allocer1 Alloc.java:11:222 70 // CHECK: #1 Allocer2 Alloc.java:33:444 71 // CHECK: DONE 72