Attachment 9533 Details for Bug 20116 – test app to repro the issue

test app to repro the issue

test_threads.c (text/x-csrc), 1.58 KB, created by Alexey Makhalov on 2016-09-28 20:18:32 UTC

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Creator: Alexey Makhalov

Created: 2016-09-28 20:18:32 UTC

Size: 1.58 KB

patch

obsolete

>/*
> * This program calls pthread_create() in a loop to create
> * many detached threads.  With glibc 2.22 on Photon OS the program
> * sometimes crashes with SIGSEGV in pthread_create(), usually after
> * several million threads have been created.
> */
>
>#include <pthread.h>
>#include <stdlib.h>
>#include <stdio.h>
>
>static void *
>thread_start(void *arg)
>{
>    int i;
>
>    for (i=0; i<10; i++)
>        ;
>    return NULL;
>}
>
>int
>main(int argc, char *argv[])
>{
>    int st = 0;
>    int i = 0;
>    int count = 10000000;
>    pthread_attr_t attr;
>    pthread_t thread_id;
>
>    if (argc > 1) {
>        count = atoi(argv[1]);
>    }
>
>    if (count <= 0) {
>        fprintf(stderr, "Usage: test_threads [count]\n");
>        exit(1);
>    }
>
>    st = pthread_attr_init(&attr);
>    if (st) {
>        fprintf(stderr, "pthread_attr_init() failed with error %d\n", st);
>        exit(1);
>    }
>
>    st = pthread_attr_setdetachstate(&attr, PTHREAD_CREATE_DETACHED);
>    if (st) {
>        fprintf(stderr, "pthread_setdetachstate() failed with error %d\n", st);
>        exit(1);
>    }
>
>    for (i = 0; i < count; i++) {
>        if (i > 0 && i % 100000 == 0) {
>            fprintf(stderr, ".");
>        }
>        st = pthread_create(&thread_id, &attr, thread_start, NULL);
>        if (st) {
>            fprintf(stderr, "pthread_create() failed with error %d on iteration %d\n", st, i);
>            exit(1);
>        }
>    }
>    fprintf(stderr, "created %d threads\n", count);
>
>    st = pthread_attr_destroy(&attr);
>    if (st) {
>        fprintf(stderr, "pthread_attr_destroy() failed with error %d\n", st);
>        exit(1);
>    }
>
>    return 0;
>}

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Attachments on bug 20116: 9279 | 9533 | 9534