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https://github.com/netsurf-browser/netsurf
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c512b2f054
This builds a dynamic library which can cause heap allocation (malloc) faliures after a specified number of calls. This is useful to allow tesing of memory failure allocation paths within netsurf test suites. An example test for core strings test has been added which incrementaly fails alloctions allowing all error paths in initialisation to be exercised.
59 lines
1.4 KiB
C
59 lines
1.4 KiB
C
/*
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* Copyright 2017 Vincent Sanders <vince@netsurf-browser.org>
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*
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* This file is part of NetSurf, http://www.netsurf-browser.org/
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*
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* NetSurf is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; version 2 of the License.
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*
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* NetSurf is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program. If not, see <http://www.gnu.org/licenses/>.
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*/
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/**
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* \file
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*
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* heap fault injection generation.
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*
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* This library inject allocation faults into NetSurf tests
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*/
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#define _GNU_SOURCE
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#include <stdio.h>
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#include <stdint.h>
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#include <limits.h>
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#include <dlfcn.h>
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#include "test/malloc_fig.h"
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static unsigned int count = UINT_MAX;
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void malloc_limit(unsigned int newcount)
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{
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count = newcount;
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//fprintf(stderr, "malloc_limit %d\n", count);
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}
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void* malloc(size_t size)
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{
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static void* (*real_malloc)(size_t) = NULL;
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void *p = NULL;
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if (real_malloc == NULL) {
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real_malloc = dlsym(RTLD_NEXT, "malloc");
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}
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if (count > 0) {
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p = real_malloc(size);
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count--;
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}
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//fprintf(stderr, "malloc(%d) = %p remian:%d\n", size, p, count);
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return p;
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}
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