75 lines
2.4 KiB
C++
75 lines
2.4 KiB
C++
/*
|
|
* Copyright (C) 2016 The Android Open Source Project
|
|
*
|
|
* Licensed under the Apache License, Version 2.0 (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.apache.org/licenses/LICENSE-2.0
|
|
*
|
|
* Unless required by applicable law or agreed to in writing, software
|
|
* distributed under the License is distributed on an "AS IS" BASIS,
|
|
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
|
|
* See the License for the specific language governing permissions and
|
|
* limitations under the License.
|
|
*/
|
|
|
|
#define LOG_TAG "MediaUtils"
|
|
#define LOG_NDEBUG 0
|
|
#include <utils/Log.h>
|
|
|
|
#include <cutils/properties.h>
|
|
#include <sys/resource.h>
|
|
#include <unistd.h>
|
|
|
|
#include <bionic/malloc.h>
|
|
#include <mediautils/LimitProcessMemory.h>
|
|
|
|
extern "C" void __scudo_set_rss_limit(size_t, int) __attribute__((weak));
|
|
|
|
namespace android {
|
|
|
|
void limitProcessMemory(const char *property, size_t numberOfBytes,
|
|
size_t percentageOfTotalMem) {
|
|
long pageSize = sysconf(_SC_PAGESIZE);
|
|
long numPages = sysconf(_SC_PHYS_PAGES);
|
|
size_t maxMem = SIZE_MAX;
|
|
|
|
if (pageSize > 0 && numPages > 0) {
|
|
if (size_t(numPages) < SIZE_MAX / size_t(pageSize)) {
|
|
maxMem = size_t(numPages) * size_t(pageSize);
|
|
}
|
|
ALOGV("physMem: %zu", maxMem);
|
|
if (percentageOfTotalMem > 100) {
|
|
ALOGW("requested %zu%% of total memory, using 100%%", percentageOfTotalMem);
|
|
percentageOfTotalMem = 100;
|
|
}
|
|
maxMem = maxMem / 100 * percentageOfTotalMem;
|
|
if (numberOfBytes < maxMem) {
|
|
maxMem = numberOfBytes;
|
|
}
|
|
ALOGV("requested limit: %zu", maxMem);
|
|
} else {
|
|
ALOGW("couldn't determine total RAM");
|
|
}
|
|
|
|
int64_t propVal = property_get_int64(property, maxMem);
|
|
if (propVal > 0 && uint64_t(propVal) <= SIZE_MAX) {
|
|
maxMem = propVal;
|
|
}
|
|
|
|
// If Scudo is in use, enforce the hard RSS limit (in MB).
|
|
if (maxMem != SIZE_MAX && &__scudo_set_rss_limit != 0) {
|
|
__scudo_set_rss_limit(maxMem >> 20, 1);
|
|
ALOGV("Scudo hard RSS limit set to %zu MB", maxMem >> 20);
|
|
return;
|
|
}
|
|
|
|
if (!android_mallopt(M_SET_ALLOCATION_LIMIT_BYTES, &maxMem,
|
|
sizeof(maxMem))) {
|
|
ALOGW("couldn't set allocation limit");
|
|
}
|
|
}
|
|
|
|
} // namespace android
|