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 <sched.h> 11 #include <stdio.h> 12 #include <stdlib.h> 13 14 extern "C" 15 void *registers_thread_func(void *arg) { 16 int *sync = reinterpret_cast<int *>(arg); 17 void *p = malloc(1337); 18 // To store the pointer, choose a register which is unlikely to be reused by 19 // a function call. 20 #if defined(__i386__) 21 asm ( "mov %0, %%esi" 22 : 23 : "r" (p) 24 ); 25 #elif defined(__x86_64__) 26 asm ( "mov %0, %%r15" 27 : 28 : "r" (p) 29 ); 30 #elif defined(__mips__) 31 asm ( "move $16, %0" 32 : 33 : "r" (p) 34 ); 35 #else 36 #error "Test is not supported on this architecture." 37 #endif 38 fprintf(stderr, "Test alloc: %p.\n", p); 39 fflush(stderr); 40 __sync_fetch_and_xor(sync, 1); 41 while (true) 42 sched_yield(); 43 } 44 45 int main() { 46 int sync = 0; 47 pthread_t thread_id; 48 int res = pthread_create(&thread_id, 0, registers_thread_func, &sync); 49 assert(res == 0); 50 while (!__sync_fetch_and_xor(&sync, 0)) 51 sched_yield(); 52 return 0; 53 } 54 // CHECK: Test alloc: [[ADDR:.*]]. 55 // CHECK: LeakSanitizer: detected memory leaks 56 // CHECK: [[ADDR]] (1337 bytes) 57 // CHECK: SUMMARY: {{(Leak|Address)}}Sanitizer: 58
