summary: Test for bz585674 (free() race in mcheck hooks)
description: |
    Bug summary: free() race in mcheck hooks
    Bugzilla link: https://bugzilla.redhat.com/show_bug.cgi?id=585674

    Description:

    Description of problem:
    segfaults can occur with MEMCHECK_ALLOC_=3 enabled.  This was reported and fixed upstream at
    http://sourceware.org/bugzilla/show_bug.cgi?id=10282
    http://sourceware.org/git/?p=glibc.git;a=commitdiff;h=cc49a5a8837be1f9307b167d9bf4399798a847c9

    Version-Release number of selected component (if applicable):
    glibc-2.5-49

    How reproducible:
    every time

    Steps to Reproduce:
    1. cat malloc_test.c
    #include <stdlib.h>
    #include <unistd.h>

    int main(void)
    {
    #pragma omp parallel num_threads(256)
     while (1) {
       void *ptr = malloc(rand() % 65536);
       usleep((rand() % 100) * 100);
       free(ptr);
       usleep((rand() % 100) * 100);
     }
     return 0;
    }

    2. gcc -fopenmp -g -o malloc_check malloc_check.c

    3. MALLOC_CHECK_=3 ./malloc_test
      
    Actual results:
    malloc: using debugging hooks
    *** glibc detected *** ./malloc_test: free(): invalid pointer: 0x00000000043e9c90 ***


    Expected results:
    no segfaults

    Additional info:
contact: Petr Muller <pmuller@redhat.com>
component:
  - glibc
test: ./runtest.sh
framework: beakerlib
recommend:
  - glibc
  - gcc
  - libgomp
duration: 90m
link:
  - relates: https://bugzilla.redhat.com/show_bug.cgi?id=585674
extra-summary: /tools/glibc/Regression/bz585674-free-race-in-mcheck-hooks
extra-task: /tools/glibc/Regression/bz585674-free-race-in-mcheck-hooks