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
14extern "C"
15void *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
45int 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