nghttp2/tests/malloc_wrapper.c

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/*
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* nghttp2 - HTTP/2 C Library
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*
* Copyright (c) 2012 Tatsuhiro Tsujikawa
*
* Permission is hereby granted, free of charge, to any person obtaining
* a copy of this software and associated documentation files (the
* "Software"), to deal in the Software without restriction, including
* without limitation the rights to use, copy, modify, merge, publish,
* distribute, sublicense, and/or sell copies of the Software, and to
* permit persons to whom the Software is furnished to do so, subject to
* the following conditions:
*
* The above copyright notice and this permission notice shall be
* included in all copies or substantial portions of the Software.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
* EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
* NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
* LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
* OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
* WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
*/
#include "malloc_wrapper.h"
#define __USE_GNU
#include <dlfcn.h>
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int nghttp2_failmalloc = 0;
int nghttp2_failstart = 0;
int nghttp2_countmalloc = 1;
int nghttp2_nmalloc = 0;
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static void* (*real_malloc)(size_t) = NULL;
static void init(void)
{
real_malloc = dlsym(RTLD_NEXT, "malloc");
}
void* malloc(size_t size)
{
if(real_malloc == NULL) {
init();
}
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if(nghttp2_failmalloc && nghttp2_nmalloc >= nghttp2_failstart) {
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return NULL;
} else {
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if(nghttp2_countmalloc) {
++nghttp2_nmalloc;
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}
return real_malloc(size);
}
}
static int failmalloc_bk, countmalloc_bk;
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void nghttp2_failmalloc_pause(void)
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{
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failmalloc_bk = nghttp2_failmalloc;
countmalloc_bk = nghttp2_countmalloc;
nghttp2_failmalloc = 0;
nghttp2_countmalloc = 0;
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}
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void nghttp2_failmalloc_unpause(void)
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{
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nghttp2_failmalloc = failmalloc_bk;
nghttp2_countmalloc = countmalloc_bk;
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}