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
art_heap_morecore(void * m,intptr_t increment)45 static void* art_heap_morecore(void* m, intptr_t increment) {
46 return ::art::gc::allocator::ArtDlMallocMoreCore(m, increment);
47 }
48
art_heap_corruption(const char * function)49 static void art_heap_corruption(const char* function) {
50 LOG(FATAL) << "Corrupt heap detected in: " << function;
51 }
52
art_heap_usage_error(const char * function,void * p)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
DlmallocMadviseCallback(void * start,void * end,size_t used_bytes,void * arg)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
DlmallocBytesAllocatedCallback(void * start ATTRIBUTE_UNUSED,void * end ATTRIBUTE_UNUSED,size_t used_bytes,void * arg)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
DlmallocObjectsAllocatedCallback(void * start ATTRIBUTE_UNUSED,void * end ATTRIBUTE_UNUSED,size_t used_bytes,void * arg)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