The Android Open Source Project | edbf3b6 | 2009-03-03 19:31:44 -0800 | [diff] [blame] | 1 | /* |
| 2 | * Copyright (C) 2008 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 | #define LOG_TAG "IMemory" |
| 18 | |
Hans Boehm | 7e20297 | 2016-07-12 18:05:49 -0700 | [diff] [blame] | 19 | #include <atomic> |
Mathias Agopian | e9e9fe4 | 2017-02-28 16:25:16 -0800 | [diff] [blame] | 20 | #include <stdatomic.h> |
| 21 | |
Mark Salyzyn | a5e161b | 2016-09-29 08:08:05 -0700 | [diff] [blame] | 22 | #include <fcntl.h> |
The Android Open Source Project | edbf3b6 | 2009-03-03 19:31:44 -0800 | [diff] [blame] | 23 | #include <stdint.h> |
| 24 | #include <stdio.h> |
| 25 | #include <stdlib.h> |
The Android Open Source Project | edbf3b6 | 2009-03-03 19:31:44 -0800 | [diff] [blame] | 26 | #include <sys/types.h> |
| 27 | #include <sys/mman.h> |
Mark Salyzyn | a5e161b | 2016-09-29 08:08:05 -0700 | [diff] [blame] | 28 | #include <unistd.h> |
The Android Open Source Project | edbf3b6 | 2009-03-03 19:31:44 -0800 | [diff] [blame] | 29 | |
Mathias Agopian | c5b2c0b | 2009-05-19 19:08:10 -0700 | [diff] [blame] | 30 | #include <binder/IMemory.h> |
Mathias Agopian | c5b2c0b | 2009-05-19 19:08:10 -0700 | [diff] [blame] | 31 | #include <binder/Parcel.h> |
Mark Salyzyn | 7823e12 | 2016-09-29 08:08:05 -0700 | [diff] [blame] | 32 | #include <log/log.h> |
Mathias Agopian | e9e9fe4 | 2017-02-28 16:25:16 -0800 | [diff] [blame] | 33 | |
Mark Salyzyn | a5e161b | 2016-09-29 08:08:05 -0700 | [diff] [blame] | 34 | #include <utils/KeyedVector.h> |
| 35 | #include <utils/threads.h> |
The Android Open Source Project | edbf3b6 | 2009-03-03 19:31:44 -0800 | [diff] [blame] | 36 | |
| 37 | #define VERBOSE 0 |
| 38 | |
| 39 | namespace android { |
| 40 | // --------------------------------------------------------------------------- |
| 41 | |
| 42 | class HeapCache : public IBinder::DeathRecipient |
| 43 | { |
| 44 | public: |
| 45 | HeapCache(); |
| 46 | virtual ~HeapCache(); |
Anu Sundararajan | 5728a92 | 2011-06-22 15:58:59 -0500 | [diff] [blame] | 47 | |
The Android Open Source Project | edbf3b6 | 2009-03-03 19:31:44 -0800 | [diff] [blame] | 48 | virtual void binderDied(const wp<IBinder>& who); |
| 49 | |
Anu Sundararajan | 5728a92 | 2011-06-22 15:58:59 -0500 | [diff] [blame] | 50 | sp<IMemoryHeap> find_heap(const sp<IBinder>& binder); |
| 51 | void free_heap(const sp<IBinder>& binder); |
The Android Open Source Project | edbf3b6 | 2009-03-03 19:31:44 -0800 | [diff] [blame] | 52 | sp<IMemoryHeap> get_heap(const sp<IBinder>& binder); |
| 53 | void dump_heaps(); |
| 54 | |
| 55 | private: |
| 56 | // For IMemory.cpp |
| 57 | struct heap_info_t { |
| 58 | sp<IMemoryHeap> heap; |
| 59 | int32_t count; |
Hans Boehm | 7e20297 | 2016-07-12 18:05:49 -0700 | [diff] [blame] | 60 | // Note that this cannot be meaningfully copied. |
The Android Open Source Project | edbf3b6 | 2009-03-03 19:31:44 -0800 | [diff] [blame] | 61 | }; |
| 62 | |
Anu Sundararajan | 5728a92 | 2011-06-22 15:58:59 -0500 | [diff] [blame] | 63 | void free_heap(const wp<IBinder>& binder); |
The Android Open Source Project | edbf3b6 | 2009-03-03 19:31:44 -0800 | [diff] [blame] | 64 | |
Hans Boehm | 7e20297 | 2016-07-12 18:05:49 -0700 | [diff] [blame] | 65 | Mutex mHeapCacheLock; // Protects entire vector below. |
The Android Open Source Project | edbf3b6 | 2009-03-03 19:31:44 -0800 | [diff] [blame] | 66 | KeyedVector< wp<IBinder>, heap_info_t > mHeapCache; |
Hans Boehm | 7e20297 | 2016-07-12 18:05:49 -0700 | [diff] [blame] | 67 | // We do not use the copy-on-write capabilities of KeyedVector. |
| 68 | // TODO: Reimplemement based on standard C++ container? |
The Android Open Source Project | edbf3b6 | 2009-03-03 19:31:44 -0800 | [diff] [blame] | 69 | }; |
| 70 | |
Steven Moreland | 1a3a8ef | 2021-04-02 02:52:46 +0000 | [diff] [blame] | 71 | static sp<HeapCache> gHeapCache = sp<HeapCache>::make(); |
The Android Open Source Project | edbf3b6 | 2009-03-03 19:31:44 -0800 | [diff] [blame] | 72 | |
| 73 | /******************************************************************************/ |
| 74 | |
| 75 | enum { |
| 76 | HEAP_ID = IBinder::FIRST_CALL_TRANSACTION |
| 77 | }; |
| 78 | |
| 79 | class BpMemoryHeap : public BpInterface<IMemoryHeap> |
| 80 | { |
| 81 | public: |
Chih-Hung Hsieh | e2347b7 | 2016-04-25 15:41:05 -0700 | [diff] [blame] | 82 | explicit BpMemoryHeap(const sp<IBinder>& impl); |
The Android Open Source Project | edbf3b6 | 2009-03-03 19:31:44 -0800 | [diff] [blame] | 83 | virtual ~BpMemoryHeap(); |
| 84 | |
Yi Kong | f4bb6ff | 2020-02-25 15:37:53 +0800 | [diff] [blame] | 85 | int getHeapID() const override; |
| 86 | void* getBase() const override; |
| 87 | size_t getSize() const override; |
| 88 | uint32_t getFlags() const override; |
Andy Hung | 5b02852 | 2018-10-22 15:29:49 -0700 | [diff] [blame] | 89 | off_t getOffset() const override; |
The Android Open Source Project | edbf3b6 | 2009-03-03 19:31:44 -0800 | [diff] [blame] | 90 | |
| 91 | private: |
| 92 | friend class IMemory; |
| 93 | friend class HeapCache; |
Anu Sundararajan | 5728a92 | 2011-06-22 15:58:59 -0500 | [diff] [blame] | 94 | |
The Android Open Source Project | edbf3b6 | 2009-03-03 19:31:44 -0800 | [diff] [blame] | 95 | // for debugging in this module |
| 96 | static inline sp<IMemoryHeap> find_heap(const sp<IBinder>& binder) { |
| 97 | return gHeapCache->find_heap(binder); |
| 98 | } |
| 99 | static inline void free_heap(const sp<IBinder>& binder) { |
| 100 | gHeapCache->free_heap(binder); |
| 101 | } |
| 102 | static inline sp<IMemoryHeap> get_heap(const sp<IBinder>& binder) { |
| 103 | return gHeapCache->get_heap(binder); |
| 104 | } |
| 105 | static inline void dump_heaps() { |
Anu Sundararajan | 5728a92 | 2011-06-22 15:58:59 -0500 | [diff] [blame] | 106 | gHeapCache->dump_heaps(); |
The Android Open Source Project | edbf3b6 | 2009-03-03 19:31:44 -0800 | [diff] [blame] | 107 | } |
The Android Open Source Project | edbf3b6 | 2009-03-03 19:31:44 -0800 | [diff] [blame] | 108 | |
| 109 | void assertMapped() const; |
| 110 | void assertReallyMapped() const; |
The Android Open Source Project | edbf3b6 | 2009-03-03 19:31:44 -0800 | [diff] [blame] | 111 | |
Hans Boehm | 7e20297 | 2016-07-12 18:05:49 -0700 | [diff] [blame] | 112 | mutable std::atomic<int32_t> mHeapId; |
The Android Open Source Project | edbf3b6 | 2009-03-03 19:31:44 -0800 | [diff] [blame] | 113 | mutable void* mBase; |
| 114 | mutable size_t mSize; |
| 115 | mutable uint32_t mFlags; |
Andy Hung | 5b02852 | 2018-10-22 15:29:49 -0700 | [diff] [blame] | 116 | mutable off_t mOffset; |
The Android Open Source Project | edbf3b6 | 2009-03-03 19:31:44 -0800 | [diff] [blame] | 117 | mutable bool mRealHeap; |
| 118 | mutable Mutex mLock; |
| 119 | }; |
| 120 | |
| 121 | // ---------------------------------------------------------------------------- |
| 122 | |
| 123 | enum { |
| 124 | GET_MEMORY = IBinder::FIRST_CALL_TRANSACTION |
| 125 | }; |
| 126 | |
| 127 | class BpMemory : public BpInterface<IMemory> |
| 128 | { |
| 129 | public: |
Chih-Hung Hsieh | e2347b7 | 2016-04-25 15:41:05 -0700 | [diff] [blame] | 130 | explicit BpMemory(const sp<IBinder>& impl); |
The Android Open Source Project | edbf3b6 | 2009-03-03 19:31:44 -0800 | [diff] [blame] | 131 | virtual ~BpMemory(); |
Jiyong Park | b86c866 | 2018-10-29 23:01:57 +0900 | [diff] [blame] | 132 | // NOLINTNEXTLINE(google-default-arguments) |
Yi Kong | fdd8da9 | 2018-06-07 17:52:27 -0700 | [diff] [blame] | 133 | virtual sp<IMemoryHeap> getMemory(ssize_t* offset=nullptr, size_t* size=nullptr) const; |
Anu Sundararajan | 5728a92 | 2011-06-22 15:58:59 -0500 | [diff] [blame] | 134 | |
The Android Open Source Project | edbf3b6 | 2009-03-03 19:31:44 -0800 | [diff] [blame] | 135 | private: |
| 136 | mutable sp<IMemoryHeap> mHeap; |
| 137 | mutable ssize_t mOffset; |
| 138 | mutable size_t mSize; |
| 139 | }; |
| 140 | |
| 141 | /******************************************************************************/ |
| 142 | |
| 143 | void* IMemory::fastPointer(const sp<IBinder>& binder, ssize_t offset) const |
| 144 | { |
| 145 | sp<IMemoryHeap> realHeap = BpMemoryHeap::get_heap(binder); |
| 146 | void* const base = realHeap->base(); |
| 147 | if (base == MAP_FAILED) |
Yi Kong | fdd8da9 | 2018-06-07 17:52:27 -0700 | [diff] [blame] | 148 | return nullptr; |
The Android Open Source Project | edbf3b6 | 2009-03-03 19:31:44 -0800 | [diff] [blame] | 149 | return static_cast<char*>(base) + offset; |
| 150 | } |
| 151 | |
Ytai Ben-Tsvi | acb7299 | 2019-09-05 15:14:30 -0700 | [diff] [blame] | 152 | void* IMemory::unsecurePointer() const { |
The Android Open Source Project | edbf3b6 | 2009-03-03 19:31:44 -0800 | [diff] [blame] | 153 | ssize_t offset; |
| 154 | sp<IMemoryHeap> heap = getMemory(&offset); |
Yi Kong | fdd8da9 | 2018-06-07 17:52:27 -0700 | [diff] [blame] | 155 | void* const base = heap!=nullptr ? heap->base() : MAP_FAILED; |
The Android Open Source Project | edbf3b6 | 2009-03-03 19:31:44 -0800 | [diff] [blame] | 156 | if (base == MAP_FAILED) |
Yi Kong | fdd8da9 | 2018-06-07 17:52:27 -0700 | [diff] [blame] | 157 | return nullptr; |
The Android Open Source Project | edbf3b6 | 2009-03-03 19:31:44 -0800 | [diff] [blame] | 158 | return static_cast<char*>(base) + offset; |
| 159 | } |
| 160 | |
Ytai Ben-Tsvi | acb7299 | 2019-09-05 15:14:30 -0700 | [diff] [blame] | 161 | void* IMemory::pointer() const { return unsecurePointer(); } |
| 162 | |
The Android Open Source Project | edbf3b6 | 2009-03-03 19:31:44 -0800 | [diff] [blame] | 163 | size_t IMemory::size() const { |
| 164 | size_t size; |
Yi Kong | fdd8da9 | 2018-06-07 17:52:27 -0700 | [diff] [blame] | 165 | getMemory(nullptr, &size); |
The Android Open Source Project | edbf3b6 | 2009-03-03 19:31:44 -0800 | [diff] [blame] | 166 | return size; |
| 167 | } |
| 168 | |
| 169 | ssize_t IMemory::offset() const { |
| 170 | ssize_t offset; |
| 171 | getMemory(&offset); |
| 172 | return offset; |
| 173 | } |
| 174 | |
| 175 | /******************************************************************************/ |
| 176 | |
| 177 | BpMemory::BpMemory(const sp<IBinder>& impl) |
| 178 | : BpInterface<IMemory>(impl), mOffset(0), mSize(0) |
| 179 | { |
| 180 | } |
| 181 | |
| 182 | BpMemory::~BpMemory() |
| 183 | { |
| 184 | } |
| 185 | |
Jiyong Park | b86c866 | 2018-10-29 23:01:57 +0900 | [diff] [blame] | 186 | // NOLINTNEXTLINE(google-default-arguments) |
The Android Open Source Project | edbf3b6 | 2009-03-03 19:31:44 -0800 | [diff] [blame] | 187 | sp<IMemoryHeap> BpMemory::getMemory(ssize_t* offset, size_t* size) const |
| 188 | { |
Yi Kong | fdd8da9 | 2018-06-07 17:52:27 -0700 | [diff] [blame] | 189 | if (mHeap == nullptr) { |
The Android Open Source Project | edbf3b6 | 2009-03-03 19:31:44 -0800 | [diff] [blame] | 190 | Parcel data, reply; |
| 191 | data.writeInterfaceToken(IMemory::getInterfaceDescriptor()); |
| 192 | if (remote()->transact(GET_MEMORY, data, &reply) == NO_ERROR) { |
| 193 | sp<IBinder> heap = reply.readStrongBinder(); |
Yi Kong | fdd8da9 | 2018-06-07 17:52:27 -0700 | [diff] [blame] | 194 | if (heap != nullptr) { |
The Android Open Source Project | edbf3b6 | 2009-03-03 19:31:44 -0800 | [diff] [blame] | 195 | mHeap = interface_cast<IMemoryHeap>(heap); |
Yi Kong | fdd8da9 | 2018-06-07 17:52:27 -0700 | [diff] [blame] | 196 | if (mHeap != nullptr) { |
Andy Hung | 5b02852 | 2018-10-22 15:29:49 -0700 | [diff] [blame] | 197 | const int64_t offset64 = reply.readInt64(); |
| 198 | const uint64_t size64 = reply.readUint64(); |
| 199 | const ssize_t o = (ssize_t)offset64; |
| 200 | const size_t s = (size_t)size64; |
Christopher Tate | 94b0d4e | 2016-02-05 19:02:56 -0800 | [diff] [blame] | 201 | size_t heapSize = mHeap->getSize(); |
Andy Hung | 5b02852 | 2018-10-22 15:29:49 -0700 | [diff] [blame] | 202 | if (s == size64 && o == offset64 // ILP32 bounds check |
| 203 | && s <= heapSize |
Christopher Tate | 94b0d4e | 2016-02-05 19:02:56 -0800 | [diff] [blame] | 204 | && o >= 0 |
| 205 | && (static_cast<size_t>(o) <= heapSize - s)) { |
| 206 | mOffset = o; |
| 207 | mSize = s; |
| 208 | } else { |
| 209 | // Hm. |
| 210 | android_errorWriteWithInfoLog(0x534e4554, |
Yi Kong | fdd8da9 | 2018-06-07 17:52:27 -0700 | [diff] [blame] | 211 | "26877992", -1, nullptr, 0); |
Christopher Tate | 94b0d4e | 2016-02-05 19:02:56 -0800 | [diff] [blame] | 212 | mOffset = 0; |
| 213 | mSize = 0; |
| 214 | } |
The Android Open Source Project | edbf3b6 | 2009-03-03 19:31:44 -0800 | [diff] [blame] | 215 | } |
| 216 | } |
| 217 | } |
| 218 | } |
| 219 | if (offset) *offset = mOffset; |
| 220 | if (size) *size = mSize; |
Yi Kong | fdd8da9 | 2018-06-07 17:52:27 -0700 | [diff] [blame] | 221 | return (mSize > 0) ? mHeap : nullptr; |
The Android Open Source Project | edbf3b6 | 2009-03-03 19:31:44 -0800 | [diff] [blame] | 222 | } |
| 223 | |
| 224 | // --------------------------------------------------------------------------- |
| 225 | |
Jooyung Han | c91e3cb | 2020-11-25 06:38:17 +0900 | [diff] [blame] | 226 | IMPLEMENT_META_INTERFACE(Memory, "android.utils.IMemory") |
The Android Open Source Project | edbf3b6 | 2009-03-03 19:31:44 -0800 | [diff] [blame] | 227 | |
Mathias Agopian | 83c0446 | 2009-05-22 19:00:22 -0700 | [diff] [blame] | 228 | BnMemory::BnMemory() { |
| 229 | } |
| 230 | |
Anu Sundararajan | 5728a92 | 2011-06-22 15:58:59 -0500 | [diff] [blame] | 231 | BnMemory::~BnMemory() { |
Mathias Agopian | 83c0446 | 2009-05-22 19:00:22 -0700 | [diff] [blame] | 232 | } |
The Android Open Source Project | edbf3b6 | 2009-03-03 19:31:44 -0800 | [diff] [blame] | 233 | |
Jiyong Park | b86c866 | 2018-10-29 23:01:57 +0900 | [diff] [blame] | 234 | // NOLINTNEXTLINE(google-default-arguments) |
The Android Open Source Project | edbf3b6 | 2009-03-03 19:31:44 -0800 | [diff] [blame] | 235 | status_t BnMemory::onTransact( |
| 236 | uint32_t code, const Parcel& data, Parcel* reply, uint32_t flags) |
| 237 | { |
| 238 | switch(code) { |
| 239 | case GET_MEMORY: { |
| 240 | CHECK_INTERFACE(IMemory, data, reply); |
| 241 | ssize_t offset; |
| 242 | size_t size; |
Marco Nelissen | 097ca27 | 2014-11-14 08:01:01 -0800 | [diff] [blame] | 243 | reply->writeStrongBinder( IInterface::asBinder(getMemory(&offset, &size)) ); |
Andy Hung | 5b02852 | 2018-10-22 15:29:49 -0700 | [diff] [blame] | 244 | reply->writeInt64(offset); |
| 245 | reply->writeUint64(size); |
The Android Open Source Project | edbf3b6 | 2009-03-03 19:31:44 -0800 | [diff] [blame] | 246 | return NO_ERROR; |
| 247 | } break; |
| 248 | default: |
| 249 | return BBinder::onTransact(code, data, reply, flags); |
| 250 | } |
| 251 | } |
| 252 | |
| 253 | |
| 254 | /******************************************************************************/ |
| 255 | |
| 256 | BpMemoryHeap::BpMemoryHeap(const sp<IBinder>& impl) |
| 257 | : BpInterface<IMemoryHeap>(impl), |
Anu Sundararajan | 5728a92 | 2011-06-22 15:58:59 -0500 | [diff] [blame] | 258 | mHeapId(-1), mBase(MAP_FAILED), mSize(0), mFlags(0), mOffset(0), mRealHeap(false) |
The Android Open Source Project | edbf3b6 | 2009-03-03 19:31:44 -0800 | [diff] [blame] | 259 | { |
| 260 | } |
| 261 | |
| 262 | BpMemoryHeap::~BpMemoryHeap() { |
Hans Boehm | 7e20297 | 2016-07-12 18:05:49 -0700 | [diff] [blame] | 263 | int32_t heapId = mHeapId.load(memory_order_relaxed); |
| 264 | if (heapId != -1) { |
| 265 | close(heapId); |
The Android Open Source Project | edbf3b6 | 2009-03-03 19:31:44 -0800 | [diff] [blame] | 266 | if (mRealHeap) { |
| 267 | // by construction we're the last one |
| 268 | if (mBase != MAP_FAILED) { |
Marco Nelissen | 097ca27 | 2014-11-14 08:01:01 -0800 | [diff] [blame] | 269 | sp<IBinder> binder = IInterface::asBinder(this); |
The Android Open Source Project | edbf3b6 | 2009-03-03 19:31:44 -0800 | [diff] [blame] | 270 | |
| 271 | if (VERBOSE) { |
Colin Cross | 6f4f3ab | 2014-02-05 17:42:44 -0800 | [diff] [blame] | 272 | ALOGD("UNMAPPING binder=%p, heap=%p, size=%zu, fd=%d", |
Hans Boehm | 7e20297 | 2016-07-12 18:05:49 -0700 | [diff] [blame] | 273 | binder.get(), this, mSize, heapId); |
The Android Open Source Project | edbf3b6 | 2009-03-03 19:31:44 -0800 | [diff] [blame] | 274 | } |
| 275 | |
| 276 | munmap(mBase, mSize); |
| 277 | } |
| 278 | } else { |
| 279 | // remove from list only if it was mapped before |
Marco Nelissen | 097ca27 | 2014-11-14 08:01:01 -0800 | [diff] [blame] | 280 | sp<IBinder> binder = IInterface::asBinder(this); |
The Android Open Source Project | edbf3b6 | 2009-03-03 19:31:44 -0800 | [diff] [blame] | 281 | free_heap(binder); |
| 282 | } |
| 283 | } |
| 284 | } |
| 285 | |
| 286 | void BpMemoryHeap::assertMapped() const |
| 287 | { |
Hans Boehm | 7e20297 | 2016-07-12 18:05:49 -0700 | [diff] [blame] | 288 | int32_t heapId = mHeapId.load(memory_order_acquire); |
| 289 | if (heapId == -1) { |
Marco Nelissen | 097ca27 | 2014-11-14 08:01:01 -0800 | [diff] [blame] | 290 | sp<IBinder> binder(IInterface::asBinder(const_cast<BpMemoryHeap*>(this))); |
Steven Moreland | 1a3a8ef | 2021-04-02 02:52:46 +0000 | [diff] [blame] | 291 | sp<BpMemoryHeap> heap = sp<BpMemoryHeap>::cast(find_heap(binder)); |
The Android Open Source Project | edbf3b6 | 2009-03-03 19:31:44 -0800 | [diff] [blame] | 292 | heap->assertReallyMapped(); |
| 293 | if (heap->mBase != MAP_FAILED) { |
| 294 | Mutex::Autolock _l(mLock); |
Hans Boehm | 7e20297 | 2016-07-12 18:05:49 -0700 | [diff] [blame] | 295 | if (mHeapId.load(memory_order_relaxed) == -1) { |
The Android Open Source Project | edbf3b6 | 2009-03-03 19:31:44 -0800 | [diff] [blame] | 296 | mBase = heap->mBase; |
| 297 | mSize = heap->mSize; |
Anu Sundararajan | 5728a92 | 2011-06-22 15:58:59 -0500 | [diff] [blame] | 298 | mOffset = heap->mOffset; |
Nick Kralevich | ec9ec7d | 2016-12-17 19:47:27 -0800 | [diff] [blame] | 299 | int fd = fcntl(heap->mHeapId.load(memory_order_relaxed), F_DUPFD_CLOEXEC, 0); |
Hans Boehm | 7e20297 | 2016-07-12 18:05:49 -0700 | [diff] [blame] | 300 | ALOGE_IF(fd==-1, "cannot dup fd=%d", |
| 301 | heap->mHeapId.load(memory_order_relaxed)); |
| 302 | mHeapId.store(fd, memory_order_release); |
The Android Open Source Project | edbf3b6 | 2009-03-03 19:31:44 -0800 | [diff] [blame] | 303 | } |
| 304 | } else { |
| 305 | // something went wrong |
| 306 | free_heap(binder); |
| 307 | } |
| 308 | } |
| 309 | } |
| 310 | |
| 311 | void BpMemoryHeap::assertReallyMapped() const |
| 312 | { |
Hans Boehm | 7e20297 | 2016-07-12 18:05:49 -0700 | [diff] [blame] | 313 | int32_t heapId = mHeapId.load(memory_order_acquire); |
| 314 | if (heapId == -1) { |
The Android Open Source Project | edbf3b6 | 2009-03-03 19:31:44 -0800 | [diff] [blame] | 315 | |
| 316 | // remote call without mLock held, worse case scenario, we end up |
| 317 | // calling transact() from multiple threads, but that's not a problem, |
| 318 | // only mmap below must be in the critical section. |
Anu Sundararajan | 5728a92 | 2011-06-22 15:58:59 -0500 | [diff] [blame] | 319 | |
The Android Open Source Project | edbf3b6 | 2009-03-03 19:31:44 -0800 | [diff] [blame] | 320 | Parcel data, reply; |
| 321 | data.writeInterfaceToken(IMemoryHeap::getInterfaceDescriptor()); |
| 322 | status_t err = remote()->transact(HEAP_ID, data, &reply); |
| 323 | int parcel_fd = reply.readFileDescriptor(); |
Andy Hung | 5b02852 | 2018-10-22 15:29:49 -0700 | [diff] [blame] | 324 | const uint64_t size64 = reply.readUint64(); |
| 325 | const int64_t offset64 = reply.readInt64(); |
| 326 | const uint32_t flags = reply.readUint32(); |
| 327 | const size_t size = (size_t)size64; |
| 328 | const off_t offset = (off_t)offset64; |
| 329 | if (err != NO_ERROR || // failed transaction |
| 330 | size != size64 || offset != offset64) { // ILP32 size check |
| 331 | ALOGE("binder=%p transaction failed fd=%d, size=%zu, err=%d (%s)", |
| 332 | IInterface::asBinder(this).get(), |
| 333 | parcel_fd, size, err, strerror(-err)); |
| 334 | return; |
| 335 | } |
The Android Open Source Project | edbf3b6 | 2009-03-03 19:31:44 -0800 | [diff] [blame] | 336 | |
The Android Open Source Project | edbf3b6 | 2009-03-03 19:31:44 -0800 | [diff] [blame] | 337 | Mutex::Autolock _l(mLock); |
Hans Boehm | 7e20297 | 2016-07-12 18:05:49 -0700 | [diff] [blame] | 338 | if (mHeapId.load(memory_order_relaxed) == -1) { |
Nick Kralevich | ec9ec7d | 2016-12-17 19:47:27 -0800 | [diff] [blame] | 339 | int fd = fcntl(parcel_fd, F_DUPFD_CLOEXEC, 0); |
Andy Hung | 5b02852 | 2018-10-22 15:29:49 -0700 | [diff] [blame] | 340 | ALOGE_IF(fd == -1, "cannot dup fd=%d, size=%zu, err=%d (%s)", |
John Eckerdal | 6b0b063 | 2016-04-21 15:04:14 +0200 | [diff] [blame] | 341 | parcel_fd, size, err, strerror(errno)); |
| 342 | |
| 343 | int access = PROT_READ; |
| 344 | if (!(flags & READ_ONLY)) { |
| 345 | access |= PROT_WRITE; |
| 346 | } |
The Android Open Source Project | edbf3b6 | 2009-03-03 19:31:44 -0800 | [diff] [blame] | 347 | mRealHeap = true; |
Yi Kong | fdd8da9 | 2018-06-07 17:52:27 -0700 | [diff] [blame] | 348 | mBase = mmap(nullptr, size, access, MAP_SHARED, fd, offset); |
The Android Open Source Project | edbf3b6 | 2009-03-03 19:31:44 -0800 | [diff] [blame] | 349 | if (mBase == MAP_FAILED) { |
Andy Hung | 5b02852 | 2018-10-22 15:29:49 -0700 | [diff] [blame] | 350 | ALOGE("cannot map BpMemoryHeap (binder=%p), size=%zu, fd=%d (%s)", |
Marco Nelissen | 097ca27 | 2014-11-14 08:01:01 -0800 | [diff] [blame] | 351 | IInterface::asBinder(this).get(), size, fd, strerror(errno)); |
The Android Open Source Project | edbf3b6 | 2009-03-03 19:31:44 -0800 | [diff] [blame] | 352 | close(fd); |
| 353 | } else { |
The Android Open Source Project | edbf3b6 | 2009-03-03 19:31:44 -0800 | [diff] [blame] | 354 | mSize = size; |
| 355 | mFlags = flags; |
Anu Sundararajan | 5728a92 | 2011-06-22 15:58:59 -0500 | [diff] [blame] | 356 | mOffset = offset; |
Hans Boehm | 7e20297 | 2016-07-12 18:05:49 -0700 | [diff] [blame] | 357 | mHeapId.store(fd, memory_order_release); |
The Android Open Source Project | edbf3b6 | 2009-03-03 19:31:44 -0800 | [diff] [blame] | 358 | } |
| 359 | } |
| 360 | } |
| 361 | } |
| 362 | |
| 363 | int BpMemoryHeap::getHeapID() const { |
| 364 | assertMapped(); |
Hans Boehm | 7e20297 | 2016-07-12 18:05:49 -0700 | [diff] [blame] | 365 | // We either stored mHeapId ourselves, or loaded it with acquire semantics. |
| 366 | return mHeapId.load(memory_order_relaxed); |
The Android Open Source Project | edbf3b6 | 2009-03-03 19:31:44 -0800 | [diff] [blame] | 367 | } |
| 368 | |
| 369 | void* BpMemoryHeap::getBase() const { |
| 370 | assertMapped(); |
| 371 | return mBase; |
| 372 | } |
| 373 | |
| 374 | size_t BpMemoryHeap::getSize() const { |
| 375 | assertMapped(); |
| 376 | return mSize; |
| 377 | } |
| 378 | |
| 379 | uint32_t BpMemoryHeap::getFlags() const { |
| 380 | assertMapped(); |
| 381 | return mFlags; |
| 382 | } |
| 383 | |
Andy Hung | 5b02852 | 2018-10-22 15:29:49 -0700 | [diff] [blame] | 384 | off_t BpMemoryHeap::getOffset() const { |
Anu Sundararajan | 5728a92 | 2011-06-22 15:58:59 -0500 | [diff] [blame] | 385 | assertMapped(); |
| 386 | return mOffset; |
| 387 | } |
| 388 | |
The Android Open Source Project | edbf3b6 | 2009-03-03 19:31:44 -0800 | [diff] [blame] | 389 | // --------------------------------------------------------------------------- |
| 390 | |
Jooyung Han | c91e3cb | 2020-11-25 06:38:17 +0900 | [diff] [blame] | 391 | IMPLEMENT_META_INTERFACE(MemoryHeap, "android.utils.IMemoryHeap") |
The Android Open Source Project | edbf3b6 | 2009-03-03 19:31:44 -0800 | [diff] [blame] | 392 | |
Anu Sundararajan | 5728a92 | 2011-06-22 15:58:59 -0500 | [diff] [blame] | 393 | BnMemoryHeap::BnMemoryHeap() { |
Mathias Agopian | 83c0446 | 2009-05-22 19:00:22 -0700 | [diff] [blame] | 394 | } |
| 395 | |
Anu Sundararajan | 5728a92 | 2011-06-22 15:58:59 -0500 | [diff] [blame] | 396 | BnMemoryHeap::~BnMemoryHeap() { |
Mathias Agopian | 83c0446 | 2009-05-22 19:00:22 -0700 | [diff] [blame] | 397 | } |
| 398 | |
Jiyong Park | b86c866 | 2018-10-29 23:01:57 +0900 | [diff] [blame] | 399 | // NOLINTNEXTLINE(google-default-arguments) |
The Android Open Source Project | edbf3b6 | 2009-03-03 19:31:44 -0800 | [diff] [blame] | 400 | status_t BnMemoryHeap::onTransact( |
Mathias Agopian | 83c0446 | 2009-05-22 19:00:22 -0700 | [diff] [blame] | 401 | uint32_t code, const Parcel& data, Parcel* reply, uint32_t flags) |
The Android Open Source Project | edbf3b6 | 2009-03-03 19:31:44 -0800 | [diff] [blame] | 402 | { |
| 403 | switch(code) { |
| 404 | case HEAP_ID: { |
| 405 | CHECK_INTERFACE(IMemoryHeap, data, reply); |
| 406 | reply->writeFileDescriptor(getHeapID()); |
Andy Hung | 5b02852 | 2018-10-22 15:29:49 -0700 | [diff] [blame] | 407 | reply->writeUint64(getSize()); |
| 408 | reply->writeInt64(getOffset()); |
| 409 | reply->writeUint32(getFlags()); |
The Android Open Source Project | edbf3b6 | 2009-03-03 19:31:44 -0800 | [diff] [blame] | 410 | return NO_ERROR; |
| 411 | } break; |
| 412 | default: |
| 413 | return BBinder::onTransact(code, data, reply, flags); |
| 414 | } |
| 415 | } |
| 416 | |
| 417 | /*****************************************************************************/ |
| 418 | |
| 419 | HeapCache::HeapCache() |
| 420 | : DeathRecipient() |
| 421 | { |
| 422 | } |
| 423 | |
| 424 | HeapCache::~HeapCache() |
| 425 | { |
| 426 | } |
| 427 | |
| 428 | void HeapCache::binderDied(const wp<IBinder>& binder) |
| 429 | { |
Steve Block | 9d45368 | 2011-12-20 16:23:08 +0000 | [diff] [blame] | 430 | //ALOGD("binderDied binder=%p", binder.unsafe_get()); |
Anu Sundararajan | 5728a92 | 2011-06-22 15:58:59 -0500 | [diff] [blame] | 431 | free_heap(binder); |
The Android Open Source Project | edbf3b6 | 2009-03-03 19:31:44 -0800 | [diff] [blame] | 432 | } |
| 433 | |
Anu Sundararajan | 5728a92 | 2011-06-22 15:58:59 -0500 | [diff] [blame] | 434 | sp<IMemoryHeap> HeapCache::find_heap(const sp<IBinder>& binder) |
The Android Open Source Project | edbf3b6 | 2009-03-03 19:31:44 -0800 | [diff] [blame] | 435 | { |
| 436 | Mutex::Autolock _l(mHeapCacheLock); |
| 437 | ssize_t i = mHeapCache.indexOfKey(binder); |
| 438 | if (i>=0) { |
| 439 | heap_info_t& info = mHeapCache.editValueAt(i); |
Steve Block | 9d45368 | 2011-12-20 16:23:08 +0000 | [diff] [blame] | 440 | ALOGD_IF(VERBOSE, |
Colin Cross | 6f4f3ab | 2014-02-05 17:42:44 -0800 | [diff] [blame] | 441 | "found binder=%p, heap=%p, size=%zu, fd=%d, count=%d", |
The Android Open Source Project | edbf3b6 | 2009-03-03 19:31:44 -0800 | [diff] [blame] | 442 | binder.get(), info.heap.get(), |
| 443 | static_cast<BpMemoryHeap*>(info.heap.get())->mSize, |
Hans Boehm | 7e20297 | 2016-07-12 18:05:49 -0700 | [diff] [blame] | 444 | static_cast<BpMemoryHeap*>(info.heap.get()) |
| 445 | ->mHeapId.load(memory_order_relaxed), |
The Android Open Source Project | edbf3b6 | 2009-03-03 19:31:44 -0800 | [diff] [blame] | 446 | info.count); |
Hans Boehm | 7e20297 | 2016-07-12 18:05:49 -0700 | [diff] [blame] | 447 | ++info.count; |
The Android Open Source Project | edbf3b6 | 2009-03-03 19:31:44 -0800 | [diff] [blame] | 448 | return info.heap; |
| 449 | } else { |
| 450 | heap_info_t info; |
| 451 | info.heap = interface_cast<IMemoryHeap>(binder); |
| 452 | info.count = 1; |
Steve Block | 9d45368 | 2011-12-20 16:23:08 +0000 | [diff] [blame] | 453 | //ALOGD("adding binder=%p, heap=%p, count=%d", |
The Android Open Source Project | edbf3b6 | 2009-03-03 19:31:44 -0800 | [diff] [blame] | 454 | // binder.get(), info.heap.get(), info.count); |
| 455 | mHeapCache.add(binder, info); |
| 456 | return info.heap; |
| 457 | } |
| 458 | } |
| 459 | |
The Android Open Source Project | edbf3b6 | 2009-03-03 19:31:44 -0800 | [diff] [blame] | 460 | void HeapCache::free_heap(const sp<IBinder>& binder) { |
| 461 | free_heap( wp<IBinder>(binder) ); |
| 462 | } |
| 463 | |
Anu Sundararajan | 5728a92 | 2011-06-22 15:58:59 -0500 | [diff] [blame] | 464 | void HeapCache::free_heap(const wp<IBinder>& binder) |
The Android Open Source Project | edbf3b6 | 2009-03-03 19:31:44 -0800 | [diff] [blame] | 465 | { |
| 466 | sp<IMemoryHeap> rel; |
| 467 | { |
| 468 | Mutex::Autolock _l(mHeapCacheLock); |
| 469 | ssize_t i = mHeapCache.indexOfKey(binder); |
| 470 | if (i>=0) { |
| 471 | heap_info_t& info(mHeapCache.editValueAt(i)); |
Hans Boehm | 7e20297 | 2016-07-12 18:05:49 -0700 | [diff] [blame] | 472 | if (--info.count == 0) { |
Steve Block | 9d45368 | 2011-12-20 16:23:08 +0000 | [diff] [blame] | 473 | ALOGD_IF(VERBOSE, |
Colin Cross | 6f4f3ab | 2014-02-05 17:42:44 -0800 | [diff] [blame] | 474 | "removing binder=%p, heap=%p, size=%zu, fd=%d, count=%d", |
The Android Open Source Project | edbf3b6 | 2009-03-03 19:31:44 -0800 | [diff] [blame] | 475 | binder.unsafe_get(), info.heap.get(), |
| 476 | static_cast<BpMemoryHeap*>(info.heap.get())->mSize, |
Hans Boehm | 7e20297 | 2016-07-12 18:05:49 -0700 | [diff] [blame] | 477 | static_cast<BpMemoryHeap*>(info.heap.get()) |
| 478 | ->mHeapId.load(memory_order_relaxed), |
The Android Open Source Project | edbf3b6 | 2009-03-03 19:31:44 -0800 | [diff] [blame] | 479 | info.count); |
| 480 | rel = mHeapCache.valueAt(i).heap; |
| 481 | mHeapCache.removeItemsAt(i); |
| 482 | } |
| 483 | } else { |
Steve Block | e6f43dd | 2012-01-06 19:20:56 +0000 | [diff] [blame] | 484 | ALOGE("free_heap binder=%p not found!!!", binder.unsafe_get()); |
The Android Open Source Project | edbf3b6 | 2009-03-03 19:31:44 -0800 | [diff] [blame] | 485 | } |
| 486 | } |
| 487 | } |
| 488 | |
| 489 | sp<IMemoryHeap> HeapCache::get_heap(const sp<IBinder>& binder) |
| 490 | { |
| 491 | sp<IMemoryHeap> realHeap; |
| 492 | Mutex::Autolock _l(mHeapCacheLock); |
| 493 | ssize_t i = mHeapCache.indexOfKey(binder); |
| 494 | if (i>=0) realHeap = mHeapCache.valueAt(i).heap; |
| 495 | else realHeap = interface_cast<IMemoryHeap>(binder); |
| 496 | return realHeap; |
| 497 | } |
| 498 | |
Anu Sundararajan | 5728a92 | 2011-06-22 15:58:59 -0500 | [diff] [blame] | 499 | void HeapCache::dump_heaps() |
The Android Open Source Project | edbf3b6 | 2009-03-03 19:31:44 -0800 | [diff] [blame] | 500 | { |
| 501 | Mutex::Autolock _l(mHeapCacheLock); |
| 502 | int c = mHeapCache.size(); |
| 503 | for (int i=0 ; i<c ; i++) { |
| 504 | const heap_info_t& info = mHeapCache.valueAt(i); |
| 505 | BpMemoryHeap const* h(static_cast<BpMemoryHeap const *>(info.heap.get())); |
Colin Cross | 6f4f3ab | 2014-02-05 17:42:44 -0800 | [diff] [blame] | 506 | ALOGD("hey=%p, heap=%p, count=%d, (fd=%d, base=%p, size=%zu)", |
The Android Open Source Project | edbf3b6 | 2009-03-03 19:31:44 -0800 | [diff] [blame] | 507 | mHeapCache.keyAt(i).unsafe_get(), |
Anu Sundararajan | 5728a92 | 2011-06-22 15:58:59 -0500 | [diff] [blame] | 508 | info.heap.get(), info.count, |
Hans Boehm | 7e20297 | 2016-07-12 18:05:49 -0700 | [diff] [blame] | 509 | h->mHeapId.load(memory_order_relaxed), h->mBase, h->mSize); |
The Android Open Source Project | edbf3b6 | 2009-03-03 19:31:44 -0800 | [diff] [blame] | 510 | } |
| 511 | } |
| 512 | |
| 513 | |
| 514 | // --------------------------------------------------------------------------- |
Steven Moreland | 6511af5 | 2019-09-26 16:05:45 -0700 | [diff] [blame] | 515 | } // namespace android |