src/third_party/llvm-project/compiler-rt/test/scudo/threads.c

// RUN: %clang_scudo %s -o %t
// RUN: %env_scudo_opts="QuarantineSizeKb=0:ThreadLocalQuarantineSizeKb=0"     %run %t 5 1000000 2>&1
// RUN: %env_scudo_opts="QuarantineSizeKb=1024:ThreadLocalQuarantineSizeKb=64" %run %t 5 1000000 2>&1

// Tests parallel allocations and deallocations of memory chunks from a number
// of concurrent threads, with and without quarantine.
// This test passes if everything executes properly without crashing.

#include <assert.h>
#include <pthread.h>
#include <stdlib.h>
#include <stdio.h>

#include <sanitizer/allocator_interface.h>

int num_threads;
int total_num_alloc;
const int kMaxNumThreads = 500;
pthread_t tid[kMaxNumThreads];

pthread_cond_t cond = PTHREAD_COND_INITIALIZER;
pthread_mutex_t mutex = PTHREAD_MUTEX_INITIALIZER;
char go = 0;

void *thread_fun(void *arg) {
  pthread_mutex_lock(&mutex);
  while (!go) pthread_cond_wait(&cond, &mutex);
  pthread_mutex_unlock(&mutex);
  for (int i = 0; i < total_num_alloc / num_threads; i++) {
    void *p = malloc(10);
    __asm__ __volatile__("" : : "r"(p) : "memory");
    free(p);
  }
  return 0;
}

int main(int argc, char** argv) {
  assert(argc == 3);
  num_threads = atoi(argv[1]);
  assert(num_threads > 0);
  assert(num_threads <= kMaxNumThreads);
  total_num_alloc = atoi(argv[2]);
  assert(total_num_alloc > 0);

  printf("%d threads, %d allocations in each\n", num_threads,
         total_num_alloc / num_threads);
  fprintf(stderr, "Heap size before: %zd\n", __sanitizer_get_heap_size());
  fprintf(stderr, "Allocated bytes before: %zd\n",
          __sanitizer_get_current_allocated_bytes());

  for (int i = 0; i < num_threads; i++)
    pthread_create(&tid[i], 0, thread_fun, 0);
  pthread_mutex_lock(&mutex);
  go = 1;
  pthread_cond_broadcast(&cond);
  pthread_mutex_unlock(&mutex);
  for (int i = 0; i < num_threads; i++)
    pthread_join(tid[i], 0);

  fprintf(stderr, "Heap size after: %zd\n", __sanitizer_get_heap_size());
  fprintf(stderr, "Allocated bytes after: %zd\n",
          __sanitizer_get_current_allocated_bytes());

  return 0;
}