1 // Test that registers of running threads are included in the root set.
2 // RUN: %clangxx_lsan -pthread %s -o %t
3 // RUN: %env_lsan_opts="report_objects=1:use_stacks=0:use_registers=0" not %run %t 2>&1 | FileCheck %s
4 // RUN: %env_lsan_opts="report_objects=1:use_stacks=0:use_registers=1" %run %t 2>&1
5 // RUN: %env_lsan_opts="" %run %t 2>&1
6
7 #include "sanitizer_common/print_address.h"
8 #include <assert.h>
9 #include <pthread.h>
10 #include <sched.h>
11 #include <stdio.h>
12 #include <stdlib.h>
13
registers_thread_func(void * arg)14 extern "C" void *registers_thread_func(void *arg) {
15 int *sync = reinterpret_cast<int *>(arg);
16 void *p = malloc(1337);
17 print_address("Test alloc: ", 1, p);
18 fflush(stderr);
19
20 // To store the pointer, choose a register which is unlikely to be reused by
21 // a function call.
22 #if defined(__i386__) || defined(__i686__)
23 asm("mov %0, %%edi"
24 :
25 : "r"(p));
26 #elif defined(__x86_64__)
27 asm("mov %0, %%r15"
28 :
29 : "r"(p));
30 #elif defined(__mips__)
31 asm("move $16, %0"
32 :
33 : "r"(p));
34 #elif defined(__arm__)
35 asm("mov r5, %0"
36 :
37 : "r"(p));
38 #elif defined(__aarch64__)
39 // x9-10 are used. x11-12 are probably used.
40 // So we pick x13 to be safe and x14 as a backup.
41 // (x13 known to be used on Ubuntu Focal)
42 asm("mov x13, %0\n"
43 "mov x14, %0"
44 :
45 : "r"(p));
46 #elif defined(__powerpc__)
47 asm("mr 30, %0"
48 :
49 : "r"(p));
50 #elif defined(__s390x__)
51 asm("lgr %%r10, %0"
52 :
53 : "r"(p));
54 #elif defined(__riscv)
55 asm("mv s11, %0"
56 :
57 : "r"(p));
58 #else
59 #error "Test is not supported on this architecture."
60 #endif
61 __sync_fetch_and_xor(sync, 1);
62 while (true)
63 sched_yield();
64 }
65
main()66 int main() {
67 int sync = 0;
68 pthread_t thread_id;
69 int res = pthread_create(&thread_id, 0, registers_thread_func, &sync);
70 assert(res == 0);
71 while (!__sync_fetch_and_xor(&sync, 0))
72 sched_yield();
73 return 0;
74 }
75 // CHECK: Test alloc: [[ADDR:0x[0-9,a-f]+]]
76 // CHECK: LeakSanitizer: detected memory leaks
77 // CHECK: [[ADDR]] (1337 bytes)
78 // CHECK: SUMMARY: {{(Leak|Address)}}Sanitizer:
79