use_registers.cpp
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// Test that registers of running threads are included in the root set.
// RUN: LSAN_BASE="report_objects=1:use_stacks=0"
// RUN: %clangxx_lsan -pthread %s -o %t
// RUN: %env_lsan_opts=$LSAN_BASE:"use_registers=0" not %run %t 2>&1 | FileCheck %s
// RUN: %env_lsan_opts=$LSAN_BASE:"use_registers=1" %run %t 2>&1
// RUN: %env_lsan_opts="" %run %t 2>&1
#include <assert.h>
#include <pthread.h>
#include <sched.h>
#include <stdio.h>
#include <stdlib.h>
#include "sanitizer_common/print_address.h"
extern "C"
void *registers_thread_func(void *arg) {
int *sync = reinterpret_cast<int *>(arg);
void *p = malloc(1337);
print_address("Test alloc: ", 1, p);
fflush(stderr);
// To store the pointer, choose a register which is unlikely to be reused by
// a function call.
#if defined(__i386__)
asm ( "mov %0, %%esi"
:
: "r" (p)
);
#elif defined(__x86_64__)
asm ( "mov %0, %%r15"
:
: "r" (p)
);
#elif defined(__mips__)
asm ( "move $16, %0"
:
: "r" (p)
);
#elif defined(__arm__)
asm ( "mov r5, %0"
:
: "r" (p)
);
#elif defined(__powerpc__)
asm ( "mr 30, %0"
:
: "r" (p)
);
#elif defined(__s390x__)
asm("lgr %%r10, %0"
:
: "r"(p));
#else
#error "Test is not supported on this architecture."
#endif
__sync_fetch_and_xor(sync, 1);
while (true)
sched_yield();
}
int main() {
int sync = 0;
pthread_t thread_id;
int res = pthread_create(&thread_id, 0, registers_thread_func, &sync);
assert(res == 0);
while (!__sync_fetch_and_xor(&sync, 0))
sched_yield();
return 0;
}
// CHECK: Test alloc: [[ADDR:0x[0-9,a-f]+]]
// CHECK: LeakSanitizer: detected memory leaks
// CHECK: [[ADDR]] (1337 bytes)
// CHECK: SUMMARY: {{(Leak|Address)}}Sanitizer: