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. 23 static 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 28 static void art_heap_corruption(const char* function); 29 static 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 "../../../external/dlmalloc/malloc.c" 40 // Note: malloc.c uses a DEBUG define to drive debug code. This interferes with the DEBUG severity 41 // of libbase, so undefine it now. 42 #undef DEBUG 43 #pragma GCC diagnostic pop 44 45 static void* art_heap_morecore(void* m, intptr_t increment) { 46 return ::art::gc::allocator::ArtDlMallocMoreCore(m, increment); 47 } 48 49 static void art_heap_corruption(const char* function) { 50 LOG(FATAL) << "Corrupt heap detected in: " << function; 51 } 52 53 static void art_heap_usage_error(const char* function, void* p) { 54 LOG(FATAL) << "Incorrect use of function '" << function << "' argument " << p 55 << " not expected"; 56 } 57 58 #include "globals.h" 59 #include "utils.h" 60 #include <sys/mman.h> 61 62 extern "C" void DlmallocMadviseCallback(void* start, void* end, size_t used_bytes, void* arg) { 63 // Is this chunk in use? 64 if (used_bytes != 0) { 65 return; 66 } 67 // Do we have any whole pages to give back? 68 start = reinterpret_cast<void*>(art::RoundUp(reinterpret_cast<uintptr_t>(start), art::kPageSize)); 69 end = reinterpret_cast<void*>(art::RoundDown(reinterpret_cast<uintptr_t>(end), art::kPageSize)); 70 if (end > start) { 71 size_t length = reinterpret_cast<uint8_t*>(end) - reinterpret_cast<uint8_t*>(start); 72 int rc = madvise(start, length, MADV_DONTNEED); 73 if (UNLIKELY(rc != 0)) { 74 errno = rc; 75 PLOG(FATAL) << "madvise failed during heap trimming"; 76 } 77 size_t* reclaimed = reinterpret_cast<size_t*>(arg); 78 *reclaimed += length; 79 } 80 } 81 82 extern "C" void DlmallocBytesAllocatedCallback(void* start ATTRIBUTE_UNUSED, 83 void* end ATTRIBUTE_UNUSED, 84 size_t used_bytes, 85 void* arg) { 86 if (used_bytes == 0) { 87 return; 88 } 89 size_t* bytes_allocated = reinterpret_cast<size_t*>(arg); 90 *bytes_allocated += used_bytes + sizeof(size_t); 91 } 92 93 extern "C" void DlmallocObjectsAllocatedCallback(void* start ATTRIBUTE_UNUSED, 94 void* end ATTRIBUTE_UNUSED, 95 size_t used_bytes, 96 void* arg) { 97 if (used_bytes == 0) { 98 return; 99 } 100 size_t* objects_allocated = reinterpret_cast<size_t*>(arg); 101 ++(*objects_allocated); 102 } 103
