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cutest_memory.c
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cutest_memory.c
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/*
* Copyright (C) 2015 by Rafael Santiago
*
* This is a free software. You can redistribute it and/or modify under
* the terms of the GNU General Public License version 2.
*
*/
#if !(defined(_KERNEL) && defined(_LKM) && defined(__NetBSD__))
#include "cutest_memory.h"
#include "cutest.h"
#include "cutest_mmap.h"
#ifndef _WIN32
#include <dlfcn.h>
#else
#include <windows.h>
#endif
#ifndef _WIN32
#ifndef RTLD_NEXT
#define RTLD_NEXT -1
#endif
#endif
void *(*tru_calloc)(size_t, size_t) = NULL;
void *(*tru_malloc)(size_t) = NULL;
void *(*tru_free)(void *) = NULL;
void *(*tru_realloc)(void *, size_t) = NULL;
static int g_memhook_init_done = 0;
void init_memory_func_ptr() {
#ifdef _WIN32
HMODULE handle = NULL;
#endif
if (tru_calloc != NULL && tru_malloc != NULL && tru_realloc != NULL && tru_free != NULL) {
return;
}
#ifndef _WIN32
void *handle = (void *)RTLD_NEXT;
tru_calloc = (void *)dlsym(handle, "calloc");
tru_malloc = (void *)dlsym(handle, "malloc");
tru_free = (void *)dlsym(handle, "free");
tru_realloc = (void *)dlsym(handle, "realloc");
g_memhook_init_done = 1;
#else
handle = LoadLibrary("ucrtbase.dll");
if (handle != NULL) {
tru_calloc = (void *)GetProcAddress(handle, "calloc");
tru_malloc = (void *)GetProcAddress(handle, "malloc");
tru_free = (void *)GetProcAddress(handle, "free");
tru_realloc = (void *)GetProcAddress(handle, "realloc");
g_memhook_init_done = 1;
} else {
cute_log("libcutest INTERNAL ERROR: unable to find \"MSVCRT.dll\".\n");
}
#endif
}
void *calloc(size_t nmemb, size_t size) {
void *retval = NULL;
if (tru_calloc == NULL) {
#if defined(_WIN32) || defined(__FreeBSD__)
init_memory_func_ptr();
#endif
//if (g_memhook_init_done) {
// cute_log("libcutest INTERNAL ERROR: null tru_calloc().\n");
//}
if (tru_calloc == NULL) {
return NULL;
}
}
retval = tru_calloc(nmemb, size);
if (g_cute_leak_check) {
g_cute_mmap = add_allocation_to_cute_mmap_ctx(g_cute_mmap, size, retval, &g_cute_mmap_tail);
}
return retval;
}
void *malloc(size_t size) {
void *retval = NULL;
if (tru_malloc == NULL) {
#if defined(_WIN32) || defined(__FreeBSD__)
init_memory_func_ptr();
#endif
//if (g_memhook_init_done) {
// cute_log("libcutest INTERNAL ERROR: null tru_malloc().\n");
//}
if (tru_malloc == NULL) {
return NULL;
}
}
retval = tru_malloc(size);
if (g_cute_leak_check) {
g_cute_mmap = add_allocation_to_cute_mmap_ctx(g_cute_mmap, size, retval, &g_cute_mmap_tail);
}
return retval;
}
void free(void *ptr) {
if (tru_free == NULL) {
#if defined(_WIN32) || defined(__FreeBSD__)
init_memory_func_ptr();
#endif
//if (g_memhook_init_done) {
// cute_log("libcutest INTERNAL ERROR: null tru_free().\n");
//}
if (tru_free == NULL) {
return;
}
}
if (ptr == NULL) {
return;
}
if (g_cute_leak_check) {
g_cute_mmap = rm_allocation_from_cute_mmap_ctx(g_cute_mmap, ptr, &g_cute_mmap_tail);
}
tru_free(ptr);
}
void *realloc(void *ptr, size_t size) {
void *retval = NULL;
if (tru_realloc == NULL) {
#if defined(_WIN32) || defined(__FreeBSD__)
init_memory_func_ptr();
#endif
//if (g_memhook_init_done) {
// cute_log("libcutest INTERNAL ERROR: null tru_realloc().\n");
//}
if (tru_realloc == NULL) {
return NULL;
}
}
retval = tru_realloc(ptr, size);
if (g_cute_leak_check) {
g_cute_mmap = rm_allocation_from_cute_mmap_ctx(g_cute_mmap, ptr, &g_cute_mmap_tail);
g_cute_mmap = add_allocation_to_cute_mmap_ctx(g_cute_mmap, size, retval, &g_cute_mmap_tail);
}
return retval;
}
#endif