1 // Test that registers of running threads are included in the root set. 2 // RUN: LSAN_BASE="report_objects=1:use_stacks=0" 3 // RUN: %clangxx_lsan -pthread %s -o %t 4 // RUN: LSAN_OPTIONS=$LSAN_BASE:"use_registers=0" not %run %t 2>&1 | FileCheck %s 5 // RUN: LSAN_OPTIONS=$LSAN_BASE:"use_registers=1" %run %t 2>&1 6 // RUN: LSAN_OPTIONS="" %run %t 2>&1 7 8 #include <assert.h> 9 #include <pthread.h> 10 #include <stdio.h> 11 #include <stdlib.h> 12 13 extern "C" 14 void *registers_thread_func(void *arg) { 15 int *sync = reinterpret_cast<int *>(arg); 16 void *p = malloc(1337); 17 // To store the pointer, choose a register which is unlikely to be reused by 18 // a function call. 19 #if defined(__i386__) 20 asm ( "mov %0, %%esi" 21 : 22 : "r" (p) 23 ); 24 #elif defined(__x86_64__) 25 asm ( "mov %0, %%r15" 26 : 27 : "r" (p) 28 ); 29 #else 30 #error "Test is not supported on this architecture." 31 #endif 32 fprintf(stderr, "Test alloc: %p.\n", p); 33 fflush(stderr); 34 __sync_fetch_and_xor(sync, 1); 35 while (true) 36 pthread_yield(); 37 } 38 39 int main() { 40 int sync = 0; 41 pthread_t thread_id; 42 int res = pthread_create(&thread_id, 0, registers_thread_func, &sync); 43 assert(res == 0); 44 while (!__sync_fetch_and_xor(&sync, 0)) 45 pthread_yield(); 46 return 0; 47 } 48 // CHECK: Test alloc: [[ADDR:.*]]. 49 // CHECK: LeakSanitizer: detected memory leaks 50 // CHECK: [[ADDR]] (1337 bytes) 51 // CHECK: SUMMARY: {{(Leak|Address)}}Sanitizer: 52
