compiler-rt/test/lsan/TestCases/use_registers_extra.cpp

   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 // FIXME: Support more platforms.
   8 // REQUIRES: x86-target-arch && linux
   9
  10 #include "sanitizer_common/print_address.h"
  11 #include <assert.h>
  12 #include <pthread.h>
  13 #include <sched.h>
  14 #include <stdio.h>
  15 #include <stdlib.h>
  16
  17 extern "C" void *registers_thread_func(void *arg) {
  18   int *sync = reinterpret_cast<int *>(arg);
  19   void *p = malloc(1337);
  20   print_address("Test alloc: ", 1, p);
  21   fflush(stderr);
  22
  23   // To store the pointer, choose a register which is unlikely to be reused by
  24   // a function call.
  25 #if defined(__i386__)
  26   asm(R"(
  27     movd %0, %%xmm0
  28     mov $0, %0
  29   )"
  30       :
  31       : "r"(p));
  32 #elif defined(__x86_64__)
  33   asm(R"(
  34     movq %0, %%xmm0
  35     mov $0, %0
  36   )"
  37       :
  38       : "r"(p));
  39 #else
  40 #error "Test is not supported on this architecture."
  41 #endif
  42
  43   __sync_fetch_and_xor(sync, 1);
  44   while (true)
  45     sched_yield();
  46 }
  47
  48 int main() {
  49   int sync = 0;
  50   pthread_t thread_id;
  51   int res = pthread_create(&thread_id, 0, registers_thread_func, &sync);
  52   assert(res == 0);
  53   while (!__sync_fetch_and_xor(&sync, 0))
  54     sched_yield();
  55   return 0;
  56 }
  57 // CHECK: Test alloc: [[ADDR:0x[0-9,a-f]+]]
  58 // CHECK: LeakSanitizer: detected memory leaks
  59 // CHECK: [[ADDR]] (1337 bytes)
  60 // CHECK: SUMMARY: {{.*}}Sanitizer: