1/* 2 * Copyright (C) 2012 The Android Open Source Project 3 * 4 * Licensed under the Apache License, Version 2.0 (the "License"); 5 * you may not use this file except in compliance with the License. 6 * You may obtain a copy of the License at 7 * 8 * http://www.apache.org/licenses/LICENSE-2.0 9 * 10 * Unless required by applicable law or agreed to in writing, software 11 * distributed under the License is distributed on an "AS IS" BASIS, 12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 13 * See the License for the specific language governing permissions and 14 * limitations under the License. 15 */ 16 17#include "dlmalloc.h" 18 19#include "base/bit_utils.h" 20#include "base/logging.h" 21 22// ART specific morecore implementation defined in space.cc. 23static void* art_heap_morecore(void* m, intptr_t increment); 24#define MORECORE(x) art_heap_morecore(m, x) 25 26// Custom heap error handling. 27#define PROCEED_ON_ERROR 0 28static void art_heap_corruption(const char* function); 29static void art_heap_usage_error(const char* function, void* p); 30#define CORRUPTION_ERROR_ACTION(m) art_heap_corruption(__FUNCTION__) 31#define USAGE_ERROR_ACTION(m, p) art_heap_usage_error(__FUNCTION__, p) 32 33// Ugly inclusion of C file so that ART specific #defines configure dlmalloc for our use for 34// mspaces (regular dlmalloc is still declared in bionic). 35#pragma GCC diagnostic push 36#pragma GCC diagnostic ignored "-Wredundant-decls" 37#pragma GCC diagnostic ignored "-Wempty-body" 38#pragma GCC diagnostic ignored "-Wstrict-aliasing" 39#include "../../../bionic/libc/upstream-dlmalloc/malloc.c" 40#pragma GCC diagnostic pop 41 42static void* art_heap_morecore(void* m, intptr_t increment) { 43 return ::art::gc::allocator::ArtDlMallocMoreCore(m, increment); 44} 45 46static void art_heap_corruption(const char* function) { 47 LOG(::art::FATAL) << "Corrupt heap detected in: " << function; 48} 49 50static void art_heap_usage_error(const char* function, void* p) { 51 LOG(::art::FATAL) << "Incorrect use of function '" << function << "' argument " << p 52 << " not expected"; 53} 54 55#include "globals.h" 56#include "utils.h" 57#include <sys/mman.h> 58 59extern "C" void DlmallocMadviseCallback(void* start, void* end, size_t used_bytes, void* arg) { 60 // Is this chunk in use? 61 if (used_bytes != 0) { 62 return; 63 } 64 // Do we have any whole pages to give back? 65 start = reinterpret_cast<void*>(art::RoundUp(reinterpret_cast<uintptr_t>(start), art::kPageSize)); 66 end = reinterpret_cast<void*>(art::RoundDown(reinterpret_cast<uintptr_t>(end), art::kPageSize)); 67 if (end > start) { 68 size_t length = reinterpret_cast<uint8_t*>(end) - reinterpret_cast<uint8_t*>(start); 69 int rc = madvise(start, length, MADV_DONTNEED); 70 if (UNLIKELY(rc != 0)) { 71 errno = rc; 72 PLOG(::art::FATAL) << "madvise failed during heap trimming"; 73 } 74 size_t* reclaimed = reinterpret_cast<size_t*>(arg); 75 *reclaimed += length; 76 } 77} 78 79extern "C" void DlmallocBytesAllocatedCallback(void* start ATTRIBUTE_UNUSED, 80 void* end ATTRIBUTE_UNUSED, size_t used_bytes, 81 void* arg) { 82 if (used_bytes == 0) { 83 return; 84 } 85 size_t* bytes_allocated = reinterpret_cast<size_t*>(arg); 86 *bytes_allocated += used_bytes + sizeof(size_t); 87} 88 89extern "C" void DlmallocObjectsAllocatedCallback(void* start, void* end, size_t used_bytes, 90 void* arg) { 91 UNUSED(start); 92 UNUSED(end); 93 if (used_bytes == 0) { 94 return; 95 } 96 size_t* objects_allocated = reinterpret_cast<size_t*>(arg); 97 ++(*objects_allocated); 98} 99