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=$LSAN_BASE:"use_registers=0" not %t 2>&1 | FileCheck %s
5 // RUN: LSAN_OPTIONS=$LSAN_BASE:"use_registers=1" %t 2>&1
6 // RUN: LSAN_OPTIONS="" %t 2>&1
7
8 #include <assert.h>
9 #include <pthread.h>
10 #include <stdio.h>
11 #include <stdlib.h>
12
13 extern "C"
registers_thread_func(void * arg)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
main()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: Directly leaked 1337 byte object at [[ADDR]]
50 // CHECK: LeakSanitizer: detected memory leaks
51 // CHECK: SUMMARY: LeakSanitizer:
52