mirror of
https://github.com/mozilla/gecko-dev.git
synced 2024-11-30 00:01:50 +00:00
109 lines
3.4 KiB
C++
109 lines
3.4 KiB
C++
/* ***** BEGIN LICENSE BLOCK *****
|
|
* Version: MPL 1.1/GPL 2.0/LGPL 2.1
|
|
*
|
|
* The contents of this file are subject to the Mozilla Public License Version
|
|
* 1.1 (the "License"); you may not use this file except in compliance with
|
|
* the License. You may obtain a copy of the License at
|
|
* http://www.mozilla.org/MPL/
|
|
*
|
|
* Software distributed under the License is distributed on an "AS IS" basis,
|
|
* WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License
|
|
* for the specific language governing rights and limitations under the
|
|
* License.
|
|
*
|
|
* The Original Code is a simple OOM Test.
|
|
*
|
|
* The Initial Developer of the Original Code is
|
|
* Mozilla Corporation.
|
|
* Portions created by the Initial Developer are Copyright (C) 2008
|
|
* the Initial Developer. All Rights Reserved.
|
|
*
|
|
* Contributor(s):
|
|
* Doug Turner <dougt@meer.net>
|
|
*
|
|
* Alternatively, the contents of this file may be used under the terms of
|
|
* either the GNU General Public License Version 2 or later (the "GPL"), or
|
|
* the GNU Lesser General Public License Version 2.1 or later (the "LGPL"),
|
|
* in which case the provisions of the GPL or the LGPL are applicable instead
|
|
* of those above. If you wish to allow use of your version of this file only
|
|
* under the terms of either the GPL or the LGPL, and not to allow others to
|
|
* use your version of this file under the terms of the MPL, indicate your
|
|
* decision by deleting the provisions above and replace them with the notice
|
|
* and other provisions required by the GPL or the LGPL. If you do not delete
|
|
* the provisions above, a recipient may use your version of this file under
|
|
* the terms of any one of the MPL, the GPL or the LGPL.
|
|
*
|
|
* ***** END LICENSE BLOCK ***** */
|
|
|
|
#include <stdio.h>
|
|
#include <stdlib.h>
|
|
#include <math.h>
|
|
|
|
#include "nsXPCOM.h"
|
|
#include "nsISupportsUtils.h"
|
|
#include "nsCOMPtr.h"
|
|
#include "nsIMemory.h"
|
|
|
|
int main(int argc, char **argv)
|
|
{
|
|
nsCOMPtr<nsIMemory> mem;
|
|
nsresult rv = NS_GetMemoryManager(getter_AddRefs(mem));
|
|
|
|
if (!mem || NS_FAILED(rv))
|
|
{
|
|
printf("Could not get the memory manager\n");
|
|
return -1;
|
|
}
|
|
|
|
// allocation note. don't use nsIMemory to allocate,
|
|
// because we want to test the isLowMemory predicate
|
|
// without regard for the nsIMemory impelmentation (the
|
|
// implementation might count bytes handed out. however,
|
|
// the predicate should work with out having to rely on
|
|
// that.
|
|
void *big_alloc = malloc(1024 * 1024 * 16);
|
|
(void)big_alloc; // Tell compiler we're not using big_alloc, to fix warning
|
|
|
|
const int highpower = 500000;
|
|
|
|
char* buffers[highpower];
|
|
for (int i=0; i<highpower; i++)
|
|
buffers[i] = nsnull;
|
|
|
|
for (int i=0; i<highpower; i++)
|
|
{
|
|
PRBool lowMem = PR_FALSE;
|
|
size_t s = 4096; //pow(2,i);
|
|
buffers[i] = (char*) malloc(s);
|
|
|
|
// You have to touch the buffer
|
|
if (!buffers[i])
|
|
printf("Could not allocate a buffer of size %lu\n", (unsigned long)s);
|
|
else
|
|
{
|
|
for (size_t j=0; j<s; j++)
|
|
buffers[i][j] = 'a';
|
|
}
|
|
|
|
PRIntervalTime start = PR_IntervalNow();
|
|
mem->IsLowMemory(&lowMem);
|
|
PRIntervalTime cost = PR_IntervalNow() - start;
|
|
|
|
|
|
printf("Total Allocated: %lu. \tLow Memory now? %s\t Took (%d)\n",
|
|
(unsigned long)s*i,
|
|
lowMem ? "Yes" : "No",
|
|
PR_IntervalToMilliseconds(cost));
|
|
|
|
if (lowMem)
|
|
break;
|
|
}
|
|
|
|
for(int i=0; i<highpower; i++)
|
|
{
|
|
if (buffers[i])
|
|
free(buffers[i]);
|
|
}
|
|
return 0;
|
|
}
|