1 // RUN: %clangxx_tsan -O1 %s -o %t && %run %t 2>&1 | FileCheck %s 2 #include "java.h" 3 #include <errno.h> 4 #include <sys/mman.h> 5 6 int main() { 7 // Test that munmap interceptor resets meta shadow for the memory range. 8 // Previously __tsan_java_move failed because it encountered non-zero meta 9 // shadow for the destination. 10 int const kHeapSize = 1024 * 1024; 11 jptr jheap = (jptr)mmap(0, kHeapSize, PROT_READ | PROT_WRITE, 12 MAP_ANON | MAP_PRIVATE, -1, 0); 13 if (jheap == (jptr)MAP_FAILED) 14 return printf("mmap failed with %d\n", errno); 15 __atomic_store_n((int*)jheap, 1, __ATOMIC_RELEASE); 16 munmap((void*)jheap, kHeapSize); 17 jheap = (jptr)mmap((void*)jheap, kHeapSize, PROT_READ | PROT_WRITE, 18 MAP_ANON | MAP_PRIVATE, -1, 0); 19 if (jheap == (jptr)MAP_FAILED) 20 return printf("second mmap failed with %d\n", errno); 21 __tsan_java_init(jheap, kHeapSize); 22 __tsan_java_move(jheap + 16, jheap, 16); 23 fprintf(stderr, "DONE\n"); 24 return __tsan_java_fini(); 25 } 26 27 // CHECK-NOT: WARNING: ThreadSanitizer: data race 28 // CHECK: DONE 29
