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 <android-base/logging.h> 20 21 #include "base/bit_utils.h" 22 23 // ART specific morecore implementation defined in space.cc. 24 static void* art_heap_morecore(void* m, intptr_t increment); 25 #define MORECORE(x) art_heap_morecore(m, x) 26 27 // Custom heap error handling. 28 #define PROCEED_ON_ERROR 0 29 static void art_heap_corruption(const char* function); 30 static void art_heap_usage_error(const char* function, void* p); 31 #define CORRUPTION_ERROR_ACTION(m) art_heap_corruption(__FUNCTION__) 32 #define USAGE_ERROR_ACTION(m, p) art_heap_usage_error(__FUNCTION__, p) 33 34 // Ugly inclusion of C file so that ART specific #defines configure dlmalloc for our use for 35 // mspaces (regular dlmalloc is still declared in bionic). 36 #pragma GCC diagnostic push 37 #pragma GCC diagnostic ignored "-Wredundant-decls" 38 #pragma GCC diagnostic ignored "-Wempty-body" 39 #pragma GCC diagnostic ignored "-Wstrict-aliasing" 40 #pragma GCC diagnostic ignored "-Wnull-pointer-arithmetic" 41 #include "../../../external/dlmalloc/malloc.c" 42 // Note: malloc.c uses a DEBUG define to drive debug code. This interferes with the DEBUG severity 43 // of libbase, so undefine it now. 44 #undef DEBUG 45 #pragma GCC diagnostic pop 46 47 static void* art_heap_morecore(void* m, intptr_t increment) { 48 return ::art::gc::allocator::ArtDlMallocMoreCore(m, increment); 49 } 50 51 static void art_heap_corruption(const char* function) { 52 LOG(FATAL) << "Corrupt heap detected in: " << function; 53 } 54 55 static void art_heap_usage_error(const char* function, void* p) { 56 LOG(FATAL) << "Incorrect use of function '" << function << "' argument " << p 57 << " not expected"; 58 } 59 60 #include <sys/mman.h> 61 62 #include "base/globals.h" 63 #include "base/utils.h" 64 65 extern "C" void DlmallocMadviseCallback(void* start, void* end, size_t used_bytes, void* arg) { 66 // Is this chunk in use? 67 if (used_bytes != 0) { 68 return; 69 } 70 // Do we have any whole pages to give back? 71 start = reinterpret_cast<void*>(art::RoundUp(reinterpret_cast<uintptr_t>(start), art::kPageSize)); 72 end = reinterpret_cast<void*>(art::RoundDown(reinterpret_cast<uintptr_t>(end), art::kPageSize)); 73 if (end > start) { 74 size_t length = reinterpret_cast<uint8_t*>(end) - reinterpret_cast<uint8_t*>(start); 75 int rc = madvise(start, length, MADV_DONTNEED); 76 if (UNLIKELY(rc != 0)) { 77 errno = rc; 78 PLOG(FATAL) << "madvise failed during heap trimming"; 79 } 80 size_t* reclaimed = reinterpret_cast<size_t*>(arg); 81 *reclaimed += length; 82 } 83 } 84 85 extern "C" void DlmallocBytesAllocatedCallback(void* start ATTRIBUTE_UNUSED, 86 void* end ATTRIBUTE_UNUSED, 87 size_t used_bytes, 88 void* arg) { 89 if (used_bytes == 0) { 90 return; 91 } 92 size_t* bytes_allocated = reinterpret_cast<size_t*>(arg); 93 *bytes_allocated += used_bytes + sizeof(size_t); 94 } 95 96 extern "C" void DlmallocObjectsAllocatedCallback(void* start ATTRIBUTE_UNUSED, 97 void* end ATTRIBUTE_UNUSED, 98 size_t used_bytes, 99 void* arg) { 100 if (used_bytes == 0) { 101 return; 102 } 103 size_t* objects_allocated = reinterpret_cast<size_t*>(arg); 104 ++(*objects_allocated); 105 } 106
