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" void __tsan_symbolize_external_ex( 6 jptr pc, void (*add_frame)(void *, const char *, const char *, int, int), 7 void *ctx) { 8 if (pc == (1234 | kExternalPCBit)) { 9 add_frame(ctx, "MyInnerFunc", "MyInnerFile.java", 1234, 56); 10 add_frame(ctx, "MyOuterFunc", "MyOuterFile.java", 4321, 65); 11 } 12 if (pc == (2345 | kExternalPCBit)) { 13 add_frame(ctx, "Caller1", "CallerFile.java", 111, 22); 14 add_frame(ctx, "Caller2", "CallerFile.java", 333, 44); 15 } 16 if (pc == (3456 | kExternalPCBit)) { 17 add_frame(ctx, "Allocer1", "Alloc.java", 11, 222); 18 add_frame(ctx, "Allocer2", "Alloc.java", 33, 444); 19 } 20 } 21 22 void *Thread(void *p) { 23 barrier_wait(&barrier); 24 __tsan_func_entry(2345 | kExternalPCBit); 25 __tsan_write1_pc((jptr)p + 16, 1234 | kExternalPCBit); 26 __tsan_func_exit(); 27 return 0; 28 } 29 30 jptr const kHeapSize = 64 * 1024; 31 jptr java_heap[kHeapSize]; 32 33 int main() { 34 barrier_init(&barrier, 2); 35 jptr jheap = (jptr)java_heap; 36 __tsan_java_init(jheap, kHeapSize); 37 const int kBlockSize = 32; 38 __tsan_func_entry(3456 | kExternalPCBit); 39 __tsan_java_alloc(jheap, kBlockSize); 40 __tsan_func_exit(); 41 pthread_t th; 42 pthread_create(&th, 0, Thread, (void*)jheap); 43 __tsan_func_entry(2345 | kExternalPCBit); 44 __tsan_write1_pc(jheap + 16, 1234 | kExternalPCBit); 45 __tsan_func_exit(); 46 barrier_wait(&barrier); 47 pthread_join(th, 0); 48 __tsan_java_free(jheap, kBlockSize); 49 fprintf(stderr, "DONE\n"); 50 return __tsan_java_fini(); 51 } 52 53 // CHECK: WARNING: ThreadSanitizer: data race 54 // CHECK: Write 55 // CHECK: #0 MyInnerFunc MyInnerFile.java:1234:56 56 // CHECK: #1 MyOuterFunc MyOuterFile.java:4321:65 57 // CHECK: #2 Caller1 CallerFile.java:111:22 58 // CHECK: #3 Caller2 CallerFile.java:333:44 59 // CHECK-NOT: #4 60 // CHECK: Previous write 61 // CHECK: #0 MyInnerFunc MyInnerFile.java:1234:56 62 // CHECK: #1 MyOuterFunc MyOuterFile.java:4321:65 63 // CHECK: #2 Caller1 CallerFile.java:111:22 64 // CHECK: #3 Caller2 CallerFile.java:333:44 65 // On Linux/glibc #4 is __libc_start_main, but can be something else elsewhere. 66 // CHECK: #4 67 // CHECK: Location is heap block of size 32 at {{.*}} allocated by main thread: 68 // CHECK: #0 Allocer1 Alloc.java:11:222 69 // CHECK: #1 Allocer2 Alloc.java:33:444 70 // On Linux/glibc #2 is __libc_start_main, but can be something else elsewhere. 71 // CHECK: #2 72 // CHECK: DONE 73