reverie/tests/gdbserver-integration/test-src/manyThreads.c
Jason White 20c7020868 Appease the copyright linter
Summary: The OSS license linter doesn't like the word "its".

Reviewed By: johnhurt

Differential Revision: D36856385

fbshipit-source-id: 909037d96de8976f08004497d28b77838f8c6870
2022-06-02 11:51:06 -07:00

74 lines
1.5 KiB
C

/*
* Copyright (c) Meta Platforms, Inc. and affiliates.
*
* All rights reserved.
*
* This source code is licensed under the BSD-style license found in the
* LICENSE file in the root directory of this source tree.
*/
#include <assert.h>
#include <errno.h>
#include <pthread.h>
#include <stdatomic.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <sys/mman.h>
#include <sys/types.h>
#include <time.h>
#include <unistd.h>
#define NR_THREADS 8L
#define MAX_THREADS 2048
// NB: this counter is supposed to be set by gdb cli for testing only
static volatile unsigned int bkpt_resumed_count;
static _Atomic unsigned int thread_count;
extern pid_t gettid(void);
__attribute__((noinline)) void bkpt(void) {}
__attribute__((noinline)) void foo(void) {
atomic_fetch_add(&thread_count, 1);
bkpt();
}
__attribute__((noinline)) void* threaded(void* param) {
foo();
return 0;
}
int main(int argc, char* argv[]) {
foo();
unsigned nthreads = NR_THREADS;
if (argc == 2) {
nthreads = atoi(argv[1]);
}
if (nthreads > MAX_THREADS) {
nthreads = MAX_THREADS;
}
pthread_t* threadid = calloc(nthreads, sizeof(pthread_t));
for (int i = 0; i < nthreads; i++) {
assert(pthread_create(&threadid[i], NULL, threaded, NULL) == 0);
}
for (int i = 0; i < nthreads; i++) {
pthread_join(threadid[i], NULL);
}
struct timespec tp = {
.tv_sec = 0,
.tv_nsec = 100000000,
};
clock_nanosleep(CLOCK_MONOTONIC, 0, &tp, NULL);
printf("%d %d\n", thread_count, bkpt_resumed_count);
return 0;
}