1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
|
/*
* Copyright (C) 2017 The Android Open Source Project
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
#include "chre/platform/memory_manager.h"
#include "chre/util/system/debug_dump.h"
namespace chre {
void *MemoryManager::nanoappAlloc(Nanoapp *app, uint32_t bytes) {
AllocHeader *header = nullptr;
if (bytes > 0) {
if (mAllocationCount >= kMaxAllocationCount) {
LOGE("Failed to allocate memory from Nanoapp ID %" PRIu32
": allocation count exceeded limit.",
app->getInstanceId());
} else if ((bytes > kMaxAllocationBytes) ||
((mTotalAllocatedBytes + bytes) > kMaxAllocationBytes)) {
LOGE("Failed to allocate memory from Nanoapp ID %" PRIu32
": not enough space.",
app->getInstanceId());
} else {
header =
static_cast<AllocHeader *>(doAlloc(app, sizeof(AllocHeader) + bytes));
if (header != nullptr) {
app->setTotalAllocatedBytes(app->getTotalAllocatedBytes() + bytes);
mTotalAllocatedBytes += bytes;
if (mTotalAllocatedBytes > mPeakAllocatedBytes) {
mPeakAllocatedBytes = mTotalAllocatedBytes;
}
mAllocationCount++;
header->data.bytes = bytes;
header->data.instanceId = app->getInstanceId();
header++;
}
}
}
return header;
}
void MemoryManager::nanoappFree(Nanoapp *app, void *ptr) {
if (ptr != nullptr) {
AllocHeader *header = static_cast<AllocHeader *>(ptr);
header--;
// TODO: Clean up API contract of chreSendEvent to specify nanoapps can't
// release ownership of data to other nanoapps so a CHRE_ASSERT_LOG can be
// used below and the code can return.
if (app->getInstanceId() != header->data.instanceId) {
LOGW("Nanoapp ID=%" PRIu32 " tried to free data from nanoapp ID=%" PRIu32,
app->getInstanceId(), header->data.instanceId);
}
size_t nanoAppTotalAllocatedBytes = app->getTotalAllocatedBytes();
if (nanoAppTotalAllocatedBytes >= header->data.bytes) {
app->setTotalAllocatedBytes(nanoAppTotalAllocatedBytes -
header->data.bytes);
} else {
app->setTotalAllocatedBytes(0);
}
if (mTotalAllocatedBytes >= header->data.bytes) {
mTotalAllocatedBytes -= header->data.bytes;
} else {
mTotalAllocatedBytes = 0;
}
if (mAllocationCount > 0) {
mAllocationCount--;
}
doFree(app, header);
}
}
void MemoryManager::logStateToBuffer(DebugDumpWrapper &debugDump) const {
debugDump.print(
"\nNanoapp heap usage: %zu bytes allocated, %zu peak bytes"
" allocated, count %zu\n",
getTotalAllocatedBytes(), getPeakAllocatedBytes(), getAllocationCount());
}
} // namespace chre
|
