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/logging.h" 20 21 // ART specific morecore implementation defined in space.cc. 22 #define MORECORE(x) art_heap_morecore(m, x) 23 extern "C" void* art_heap_morecore(void* m, intptr_t increment); 24 25 // Custom heap error handling. 26 #define PROCEED_ON_ERROR 0 27 static void art_heap_corruption(const char* function); 28 static void art_heap_usage_error(const char* function, void* p); 29 #define CORRUPTION_ERROR_ACTION(m) art_heap_corruption(__FUNCTION__) 30 #define USAGE_ERROR_ACTION(m, p) art_heap_usage_error(__FUNCTION__, p) 31 32 // Ugly inclusion of C file so that ART specific #defines configure dlmalloc for our use for 33 // mspaces (regular dlmalloc is still declared in bionic). 34 #pragma GCC diagnostic ignored "-Wempty-body" 35 #pragma GCC diagnostic ignored "-Wstrict-aliasing" 36 #include "../../../bionic/libc/upstream-dlmalloc/malloc.c" 37 #pragma GCC diagnostic warning "-Wstrict-aliasing" 38 #pragma GCC diagnostic warning "-Wempty-body" 39 40 41 static void art_heap_corruption(const char* function) { 42 LOG(FATAL) << "Corrupt heap detected in: " << function; 43 } 44 45 static void art_heap_usage_error(const char* function, void* p) { 46 LOG(FATAL) << "Incorrect use of function '" << function << "' argument " << p << " not expected"; 47 } 48 49 #include "globals.h" 50 #include "utils.h" 51 #include <sys/mman.h> 52 53 extern "C" void DlmallocMadviseCallback(void* start, void* end, size_t used_bytes, void* arg) { 54 // Is this chunk in use? 55 if (used_bytes != 0) { 56 return; 57 } 58 // Do we have any whole pages to give back? 59 start = reinterpret_cast<void*>(art::RoundUp(reinterpret_cast<uintptr_t>(start), art::kPageSize)); 60 end = reinterpret_cast<void*>(art::RoundDown(reinterpret_cast<uintptr_t>(end), art::kPageSize)); 61 if (end > start) { 62 size_t length = reinterpret_cast<uint8_t*>(end) - reinterpret_cast<uint8_t*>(start); 63 int rc = madvise(start, length, MADV_DONTNEED); 64 if (UNLIKELY(rc != 0)) { 65 errno = rc; 66 PLOG(FATAL) << "madvise failed during heap trimming"; 67 } 68 size_t* reclaimed = reinterpret_cast<size_t*>(arg); 69 *reclaimed += length; 70 } 71 } 72 73 extern "C" void DlmallocBytesAllocatedCallback(void* start, void* end, size_t used_bytes, void* arg) { 74 if (used_bytes == 0) { 75 return; 76 } 77 size_t* bytes_allocated = reinterpret_cast<size_t*>(arg); 78 *bytes_allocated += used_bytes + sizeof(size_t); 79 } 80 81 extern "C" void DlmallocObjectsAllocatedCallback(void* start, void* end, size_t used_bytes, void* arg) { 82 if (used_bytes == 0) { 83 return; 84 } 85 size_t* objects_allocated = reinterpret_cast<size_t*>(arg); 86 ++(*objects_allocated); 87 } 88
