blob: 5cb858c7211c11060b68a579d52168469babd3ed [file] [log] [blame]
/*
* Copyright (C) 2017 Yusuke Suzuki <utatane.tea@gmail.com>.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
*
* THIS SOFTWARE IS PROVIDED BY APPLE INC. ``AS IS'' AND ANY
* EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
* PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL APPLE INC. OR
* CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
* EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
* PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
* PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY
* OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*/
#include "config.h"
#include <wtf/MemoryFootprint.h>
#include <stdio.h>
#include <wtf/MonotonicTime.h>
#include <wtf/StdLibExtras.h>
#include <wtf/text/StringView.h>
namespace WTF {
static const Seconds s_memoryFootprintUpdateInterval = 1_s;
template<typename Functor>
static void forEachLine(FILE* file, Functor functor)
{
char* buffer = nullptr;
size_t size = 0;
while (getline(&buffer, &size, file) != -1) {
functor(buffer);
}
free(buffer);
}
static size_t computeMemoryFootprint()
{
FILE* file = fopen("/proc/self/smaps", "r");
if (!file)
return 0;
unsigned long totalPrivateDirtyInKB = 0;
bool isAnonymous = false;
forEachLine(file, [&] (char* buffer) {
{
unsigned long start;
unsigned long end;
unsigned long offset;
unsigned long inode;
char dev[32];
char perms[5];
char path[7];
int scannedCount = sscanf(buffer, "%lx-%lx %4s %lx %31s %lu %6s", &start, &end, perms, &offset, dev, &inode, path);
if (scannedCount == 6) {
isAnonymous = true;
return;
}
if (scannedCount == 7) {
StringView pathString(path);
isAnonymous = pathString == "[heap]" || pathString.startsWith("[stack");
return;
}
}
if (!isAnonymous)
return;
unsigned long privateDirtyInKB;
if (sscanf(buffer, "Private_Dirty: %lu", &privateDirtyInKB) == 1)
totalPrivateDirtyInKB += privateDirtyInKB;
});
fclose(file);
return totalPrivateDirtyInKB * KB;
}
size_t memoryFootprint()
{
static size_t footprint = 0;
static MonotonicTime previousUpdateTime = { };
Seconds elapsed = MonotonicTime::now() - previousUpdateTime;
if (elapsed >= s_memoryFootprintUpdateInterval) {
footprint = computeMemoryFootprint();
previousUpdateTime = MonotonicTime::now();
}
return footprint;
}
} // namespace WTF