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/*
* Copyright (C) 2012 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.
*/
#include "dlmalloc.h"
#include "base/logging.h"
// ART specific morecore implementation defined in space.cc.
#define MORECORE(x) art_heap_morecore(m, x)
extern "C" void* art_heap_morecore(void* m, intptr_t increment);
// Custom heap error handling.
#define PROCEED_ON_ERROR 0
static void art_heap_corruption(const char* function);
static void art_heap_usage_error(const char* function, void* p);
#define CORRUPTION_ERROR_ACTION(m) art_heap_corruption(__FUNCTION__)
#define USAGE_ERROR_ACTION(m,p) art_heap_usage_error(__FUNCTION__, p)
// Ugly inclusion of C file so that ART specific #defines configure dlmalloc for our use for
// mspaces (regular dlmalloc is still declared in bionic).
#pragma GCC diagnostic ignored "-Wempty-body"
#pragma GCC diagnostic ignored "-Wstrict-aliasing"
#include "../../../bionic/libc/upstream-dlmalloc/malloc.c"
#pragma GCC diagnostic warning "-Wstrict-aliasing"
#pragma GCC diagnostic warning "-Wempty-body"
static void art_heap_corruption(const char* function) {
LOG(FATAL) << "Corrupt heap detected in: " << function;
}
static void art_heap_usage_error(const char* function, void* p) {
LOG(FATAL) << "Incorrect use of function '" << function << "' argument " << p << " not expected";
}
#include "globals.h"
#include "utils.h"
#include <sys/mman.h>
using namespace art;
extern "C" void DlmallocMadviseCallback(void* start, void* end, size_t used_bytes, void* arg) {
// Is this chunk in use?
if (used_bytes != 0) {
return;
}
// Do we have any whole pages to give back?
start = reinterpret_cast<void*>(RoundUp(reinterpret_cast<uintptr_t>(start), kPageSize));
end = reinterpret_cast<void*>(RoundDown(reinterpret_cast<uintptr_t>(end), kPageSize));
if (end > start) {
size_t length = reinterpret_cast<byte*>(end) - reinterpret_cast<byte*>(start);
int rc = madvise(start, length, MADV_DONTNEED);
if (UNLIKELY(rc != 0)) {
errno = rc;
PLOG(FATAL) << "madvise failed during heap trimming";
}
size_t* reclaimed = reinterpret_cast<size_t*>(arg);
*reclaimed += length;
}
}
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