50 lines
1.2 KiB
Plaintext
50 lines
1.2 KiB
Plaintext
PURPOSE of /tools/glibc/Regression/bz585674-free-race-in-mcheck-hooks
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Description: Test for bz585674 (free() race in mcheck hooks)
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Author: Petr Muller <pmuller@redhat.com>
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Bug summary: free() race in mcheck hooks
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Bugzilla link: https://bugzilla.redhat.com/show_bug.cgi?id=585674
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Description:
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Description of problem:
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segfaults can occur with MEMCHECK_ALLOC_=3 enabled. This was reported and fixed upstream at
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http://sourceware.org/bugzilla/show_bug.cgi?id=10282
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http://sourceware.org/git/?p=glibc.git;a=commitdiff;h=cc49a5a8837be1f9307b167d9bf4399798a847c9
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Version-Release number of selected component (if applicable):
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glibc-2.5-49
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How reproducible:
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every time
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Steps to Reproduce:
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1. cat malloc_test.c
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#include <stdlib.h>
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#include <unistd.h>
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int main(void)
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{
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#pragma omp parallel num_threads(256)
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while (1) {
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void *ptr = malloc(rand() % 65536);
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usleep((rand() % 100) * 100);
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free(ptr);
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usleep((rand() % 100) * 100);
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}
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return 0;
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}
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2. gcc -fopenmp -g -o malloc_check malloc_check.c
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3. MALLOC_CHECK_=3 ./malloc_test
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Actual results:
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malloc: using debugging hooks
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*** glibc detected *** ./malloc_test: free(): invalid pointer: 0x00000000043e9c90 ***
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Expected results:
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no segfaults
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Additional info:
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