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/*
* This program is free software; you can redistribute it and/or
* modify it under the terms of the GNU General Public License
* as published by the Free Software Foundation; either version 2
* of the License, or (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software Foundation,
* Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
*/
/** \file
* \ingroup MEM
*/
#include <cstdio> /* Needed for `printf` on WIN32/APPLE. */
#include <cstdlib>
#include "MEM_guardedalloc.h"
#include "mallocn_intern.h"
bool leak_detector_has_run = false;
char free_after_leak_detection_message[] =
"Freeing memory after the leak detector has run. This can happen when using "
"static variables in C++ that are defined outside of functions. To fix this "
"error, use the 'construct on first use' idiom.";
namespace {
bool fail_on_memleak = false;
bool ignore_memleak = false;
class MemLeakPrinter {
public:
~MemLeakPrinter()
{
if (ignore_memleak) {
return;
}
leak_detector_has_run = true;
const uint leaked_blocks = MEM_get_memory_blocks_in_use();
if (leaked_blocks == 0) {
return;
}
const size_t mem_in_use = MEM_get_memory_in_use();
printf("Error: Not freed memory blocks: %u, total unfreed memory %f MB\n",
leaked_blocks,
(double)mem_in_use / 1024 / 1024);
MEM_printmemlist();
if (fail_on_memleak) {
/* There are many other ways to change the exit code to failure here:
* - Make the destructor noexcept(false) and throw an exception.
* - Call exit(EXIT_FAILURE).
* - Call terminate().
*/
abort();
}
}
};
} // namespace
void MEM_init_memleak_detection(void)
{
/**
* This variable is constructed when this function is first called. This should happen as soon as
* possible when the program starts.
*
* It is destructed when the program exits. During destruction, it will print information about
* leaked memory blocks. Static variables are destructed in reversed order of their
* construction. Therefore, all static variables that own memory have to be constructed after
* this function has been called.
*/
static MemLeakPrinter printer;
}
void MEM_use_memleak_detection(bool enabled)
{
ignore_memleak = !enabled;
}
void MEM_enable_fail_on_memleak(void)
{
fail_on_memleak = true;
}
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