Steven Moreland | 2e87adc | 2018-08-20 19:47:00 -0700 | [diff] [blame] | 1 | /* |
| 2 | * Copyright (C) 2018 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 <android/binder_ibinder.h> |
Steven Moreland | 4d5ad49 | 2018-09-13 12:49:16 -0700 | [diff] [blame] | 18 | #include "ibinder_internal.h" |
Steven Moreland | 2e87adc | 2018-08-20 19:47:00 -0700 | [diff] [blame] | 19 | |
| 20 | #include <android/binder_status.h> |
Steven Moreland | 4d5ad49 | 2018-09-13 12:49:16 -0700 | [diff] [blame] | 21 | #include "parcel_internal.h" |
Steven Moreland | 5d62e44 | 2018-09-13 15:01:02 -0700 | [diff] [blame] | 22 | #include "status_internal.h" |
Steven Moreland | 2e87adc | 2018-08-20 19:47:00 -0700 | [diff] [blame] | 23 | |
| 24 | #include <android-base/logging.h> |
Steven Moreland | f3034b0 | 2018-11-12 17:37:46 -0800 | [diff] [blame^] | 25 | #include <binder/IPCThreadState.h> |
Steven Moreland | 2e87adc | 2018-08-20 19:47:00 -0700 | [diff] [blame] | 26 | |
Steven Moreland | 901c745 | 2018-09-04 16:17:28 -0700 | [diff] [blame] | 27 | using DeathRecipient = ::android::IBinder::DeathRecipient; |
| 28 | |
Steven Moreland | 2e87adc | 2018-08-20 19:47:00 -0700 | [diff] [blame] | 29 | using ::android::IBinder; |
| 30 | using ::android::Parcel; |
| 31 | using ::android::sp; |
Steven Moreland | 5d62e44 | 2018-09-13 15:01:02 -0700 | [diff] [blame] | 32 | using ::android::status_t; |
Steven Moreland | 2e87adc | 2018-08-20 19:47:00 -0700 | [diff] [blame] | 33 | using ::android::String16; |
| 34 | using ::android::wp; |
| 35 | |
Steven Moreland | 71cddc3 | 2018-08-30 23:39:22 -0700 | [diff] [blame] | 36 | namespace ABBinderTag { |
| 37 | |
| 38 | static const void* kId = "ABBinder"; |
| 39 | static void* kValue = static_cast<void*>(new bool{true}); |
Steven Moreland | 9496895 | 2018-09-05 14:42:59 -0700 | [diff] [blame] | 40 | void clean(const void* /*id*/, void* /*obj*/, void* /*cookie*/){/* do nothing */}; |
Steven Moreland | 71cddc3 | 2018-08-30 23:39:22 -0700 | [diff] [blame] | 41 | |
| 42 | static void attach(const sp<IBinder>& binder) { |
Steven Moreland | 9496895 | 2018-09-05 14:42:59 -0700 | [diff] [blame] | 43 | binder->attachObject(kId, kValue, nullptr /*cookie*/, clean); |
Steven Moreland | 71cddc3 | 2018-08-30 23:39:22 -0700 | [diff] [blame] | 44 | } |
| 45 | static bool has(const sp<IBinder>& binder) { |
| 46 | return binder != nullptr && binder->findObject(kId) == kValue; |
| 47 | } |
| 48 | |
Steven Moreland | 6cf66ac | 2018-11-02 18:14:54 -0700 | [diff] [blame] | 49 | } // namespace ABBinderTag |
Steven Moreland | 71cddc3 | 2018-08-30 23:39:22 -0700 | [diff] [blame] | 50 | |
Steven Moreland | 9496895 | 2018-09-05 14:42:59 -0700 | [diff] [blame] | 51 | namespace ABpBinderTag { |
| 52 | |
| 53 | static std::mutex gLock; |
| 54 | static const void* kId = "ABpBinder"; |
| 55 | struct Value { |
| 56 | wp<ABpBinder> binder; |
| 57 | }; |
| 58 | void clean(const void* id, void* obj, void* cookie) { |
| 59 | CHECK(id == kId) << id << " " << obj << " " << cookie; |
| 60 | |
| 61 | delete static_cast<Value*>(obj); |
| 62 | }; |
| 63 | |
Steven Moreland | 6cf66ac | 2018-11-02 18:14:54 -0700 | [diff] [blame] | 64 | } // namespace ABpBinderTag |
Steven Moreland | 9496895 | 2018-09-05 14:42:59 -0700 | [diff] [blame] | 65 | |
Steven Moreland | 2e87adc | 2018-08-20 19:47:00 -0700 | [diff] [blame] | 66 | AIBinder::AIBinder(const AIBinder_Class* clazz) : mClazz(clazz) {} |
| 67 | AIBinder::~AIBinder() {} |
| 68 | |
Steven Moreland | 71cddc3 | 2018-08-30 23:39:22 -0700 | [diff] [blame] | 69 | bool AIBinder::associateClass(const AIBinder_Class* clazz) { |
Steven Moreland | 2e87adc | 2018-08-20 19:47:00 -0700 | [diff] [blame] | 70 | using ::android::String8; |
| 71 | |
Steven Moreland | 71cddc3 | 2018-08-30 23:39:22 -0700 | [diff] [blame] | 72 | if (clazz == nullptr) return false; |
| 73 | if (mClazz == clazz) return true; |
Steven Moreland | 2e87adc | 2018-08-20 19:47:00 -0700 | [diff] [blame] | 74 | |
| 75 | String8 newDescriptor(clazz->getInterfaceDescriptor()); |
| 76 | |
| 77 | if (mClazz != nullptr) { |
| 78 | String8 currentDescriptor(mClazz->getInterfaceDescriptor()); |
| 79 | if (newDescriptor == currentDescriptor) { |
| 80 | LOG(ERROR) << __func__ << ": Class descriptors '" << currentDescriptor |
| 81 | << "' match during associateClass, but they are different class objects. " |
| 82 | "Class descriptor collision?"; |
Steven Moreland | 71cddc3 | 2018-08-30 23:39:22 -0700 | [diff] [blame] | 83 | } else { |
| 84 | LOG(ERROR) << __func__ |
| 85 | << ": Class cannot be associated on object which already has a class. " |
| 86 | "Trying to associate to '" |
| 87 | << newDescriptor.c_str() << "' but already set to '" |
| 88 | << currentDescriptor.c_str() << "'."; |
Steven Moreland | 2e87adc | 2018-08-20 19:47:00 -0700 | [diff] [blame] | 89 | } |
| 90 | |
Steven Moreland | 71cddc3 | 2018-08-30 23:39:22 -0700 | [diff] [blame] | 91 | // always a failure because we know mClazz != clazz |
| 92 | return false; |
Steven Moreland | 2e87adc | 2018-08-20 19:47:00 -0700 | [diff] [blame] | 93 | } |
| 94 | |
Steven Moreland | 6cf66ac | 2018-11-02 18:14:54 -0700 | [diff] [blame] | 95 | CHECK(asABpBinder() != nullptr); // ABBinder always has a descriptor |
Steven Moreland | 71cddc3 | 2018-08-30 23:39:22 -0700 | [diff] [blame] | 96 | |
Steven Moreland | 2e87adc | 2018-08-20 19:47:00 -0700 | [diff] [blame] | 97 | String8 descriptor(getBinder()->getInterfaceDescriptor()); |
| 98 | if (descriptor != newDescriptor) { |
| 99 | LOG(ERROR) << __func__ << ": Expecting binder to have class '" << newDescriptor.c_str() |
| 100 | << "' but descriptor is actually '" << descriptor.c_str() << "'."; |
Steven Moreland | 71cddc3 | 2018-08-30 23:39:22 -0700 | [diff] [blame] | 101 | return false; |
Steven Moreland | 2e87adc | 2018-08-20 19:47:00 -0700 | [diff] [blame] | 102 | } |
| 103 | |
Steven Moreland | 71cddc3 | 2018-08-30 23:39:22 -0700 | [diff] [blame] | 104 | // if this is a local object, it's not one known to libbinder_ndk |
Steven Moreland | 2e87adc | 2018-08-20 19:47:00 -0700 | [diff] [blame] | 105 | mClazz = clazz; |
| 106 | |
Steven Moreland | 71cddc3 | 2018-08-30 23:39:22 -0700 | [diff] [blame] | 107 | return true; |
Steven Moreland | 2e87adc | 2018-08-20 19:47:00 -0700 | [diff] [blame] | 108 | } |
| 109 | |
| 110 | ABBinder::ABBinder(const AIBinder_Class* clazz, void* userData) |
Steven Moreland | 6cf66ac | 2018-11-02 18:14:54 -0700 | [diff] [blame] | 111 | : AIBinder(clazz), BBinder(), mUserData(userData) { |
Steven Moreland | 2e87adc | 2018-08-20 19:47:00 -0700 | [diff] [blame] | 112 | CHECK(clazz != nullptr); |
| 113 | } |
| 114 | ABBinder::~ABBinder() { |
| 115 | getClass()->onDestroy(mUserData); |
| 116 | } |
| 117 | |
| 118 | const String16& ABBinder::getInterfaceDescriptor() const { |
| 119 | return getClass()->getInterfaceDescriptor(); |
| 120 | } |
| 121 | |
Steven Moreland | 5d62e44 | 2018-09-13 15:01:02 -0700 | [diff] [blame] | 122 | status_t ABBinder::onTransact(transaction_code_t code, const Parcel& data, Parcel* reply, |
| 123 | binder_flags_t flags) { |
Steven Moreland | 2e87adc | 2018-08-20 19:47:00 -0700 | [diff] [blame] | 124 | if (isUserCommand(code)) { |
| 125 | if (!data.checkInterface(this)) { |
Steven Moreland | 9d089af | 2018-09-18 08:58:09 -0700 | [diff] [blame] | 126 | return STATUS_BAD_TYPE; |
Steven Moreland | 2e87adc | 2018-08-20 19:47:00 -0700 | [diff] [blame] | 127 | } |
| 128 | |
| 129 | const AParcel in = AParcel::readOnly(this, &data); |
| 130 | AParcel out = AParcel(this, reply, false /*owns*/); |
| 131 | |
Steven Moreland | 5d62e44 | 2018-09-13 15:01:02 -0700 | [diff] [blame] | 132 | binder_status_t status = getClass()->onTransact(this, code, &in, &out); |
| 133 | return PruneStatusT(status); |
Steven Moreland | 2e87adc | 2018-08-20 19:47:00 -0700 | [diff] [blame] | 134 | } else { |
| 135 | return BBinder::onTransact(code, data, reply, flags); |
| 136 | } |
| 137 | } |
| 138 | |
Steven Moreland | 71cddc3 | 2018-08-30 23:39:22 -0700 | [diff] [blame] | 139 | ABpBinder::ABpBinder(const ::android::sp<::android::IBinder>& binder) |
Steven Moreland | 6cf66ac | 2018-11-02 18:14:54 -0700 | [diff] [blame] | 140 | : AIBinder(nullptr /*clazz*/), BpRefBase(binder) { |
Steven Moreland | 2e87adc | 2018-08-20 19:47:00 -0700 | [diff] [blame] | 141 | CHECK(binder != nullptr); |
| 142 | } |
| 143 | ABpBinder::~ABpBinder() {} |
| 144 | |
Steven Moreland | 9496895 | 2018-09-05 14:42:59 -0700 | [diff] [blame] | 145 | void ABpBinder::onLastStrongRef(const void* id) { |
| 146 | { |
| 147 | std::lock_guard<std::mutex> lock(ABpBinderTag::gLock); |
| 148 | // Since ABpBinder is OBJECT_LIFETIME_WEAK, we must remove this weak reference in order for |
| 149 | // the ABpBinder to be deleted. Since a strong reference to this ABpBinder object should no |
| 150 | // longer be able to exist at the time of this method call, there is no longer a need to |
| 151 | // recover it. |
| 152 | |
| 153 | ABpBinderTag::Value* value = |
| 154 | static_cast<ABpBinderTag::Value*>(remote()->findObject(ABpBinderTag::kId)); |
| 155 | if (value != nullptr) { |
| 156 | value->binder = nullptr; |
| 157 | } |
| 158 | } |
| 159 | |
| 160 | BpRefBase::onLastStrongRef(id); |
| 161 | } |
| 162 | |
| 163 | sp<AIBinder> ABpBinder::lookupOrCreateFromBinder(const ::android::sp<::android::IBinder>& binder) { |
Steven Moreland | 71cddc3 | 2018-08-30 23:39:22 -0700 | [diff] [blame] | 164 | if (binder == nullptr) { |
| 165 | return nullptr; |
| 166 | } |
| 167 | if (ABBinderTag::has(binder)) { |
| 168 | return static_cast<ABBinder*>(binder.get()); |
| 169 | } |
Steven Moreland | 9496895 | 2018-09-05 14:42:59 -0700 | [diff] [blame] | 170 | |
| 171 | // The following code ensures that for a given binder object (remote or local), if it is not an |
| 172 | // ABBinder then at most one ABpBinder object exists in a given process representing it. |
| 173 | std::lock_guard<std::mutex> lock(ABpBinderTag::gLock); |
| 174 | |
| 175 | ABpBinderTag::Value* value = |
| 176 | static_cast<ABpBinderTag::Value*>(binder->findObject(ABpBinderTag::kId)); |
| 177 | if (value == nullptr) { |
| 178 | value = new ABpBinderTag::Value; |
| 179 | binder->attachObject(ABpBinderTag::kId, static_cast<void*>(value), nullptr /*cookie*/, |
| 180 | ABpBinderTag::clean); |
| 181 | } |
| 182 | |
| 183 | sp<ABpBinder> ret = value->binder.promote(); |
| 184 | if (ret == nullptr) { |
| 185 | ret = new ABpBinder(binder); |
| 186 | value->binder = ret; |
| 187 | } |
| 188 | |
| 189 | return ret; |
Steven Moreland | 71cddc3 | 2018-08-30 23:39:22 -0700 | [diff] [blame] | 190 | } |
| 191 | |
Steven Moreland | 2e87adc | 2018-08-20 19:47:00 -0700 | [diff] [blame] | 192 | struct AIBinder_Weak { |
| 193 | wp<AIBinder> binder; |
| 194 | }; |
| 195 | AIBinder_Weak* AIBinder_Weak_new(AIBinder* binder) { |
Steven Moreland | 5ccb70f | 2018-09-04 16:30:21 -0700 | [diff] [blame] | 196 | if (binder == nullptr) { |
| 197 | return nullptr; |
| 198 | } |
| 199 | |
Steven Moreland | 2e87adc | 2018-08-20 19:47:00 -0700 | [diff] [blame] | 200 | return new AIBinder_Weak{wp<AIBinder>(binder)}; |
| 201 | } |
Steven Moreland | 9b80e28 | 2018-09-19 13:57:23 -0700 | [diff] [blame] | 202 | void AIBinder_Weak_delete(AIBinder_Weak* weakBinder) { |
| 203 | delete weakBinder; |
Steven Moreland | 2e87adc | 2018-08-20 19:47:00 -0700 | [diff] [blame] | 204 | } |
| 205 | AIBinder* AIBinder_Weak_promote(AIBinder_Weak* weakBinder) { |
Steven Moreland | 5ccb70f | 2018-09-04 16:30:21 -0700 | [diff] [blame] | 206 | if (weakBinder == nullptr) { |
| 207 | return nullptr; |
| 208 | } |
| 209 | |
Steven Moreland | 2e87adc | 2018-08-20 19:47:00 -0700 | [diff] [blame] | 210 | sp<AIBinder> binder = weakBinder->binder.promote(); |
| 211 | AIBinder_incStrong(binder.get()); |
| 212 | return binder.get(); |
| 213 | } |
| 214 | |
| 215 | AIBinder_Class::AIBinder_Class(const char* interfaceDescriptor, AIBinder_Class_onCreate onCreate, |
| 216 | AIBinder_Class_onDestroy onDestroy, |
| 217 | AIBinder_Class_onTransact onTransact) |
Steven Moreland | 6cf66ac | 2018-11-02 18:14:54 -0700 | [diff] [blame] | 218 | : onCreate(onCreate), |
| 219 | onDestroy(onDestroy), |
| 220 | onTransact(onTransact), |
| 221 | mInterfaceDescriptor(interfaceDescriptor) {} |
Steven Moreland | 2e87adc | 2018-08-20 19:47:00 -0700 | [diff] [blame] | 222 | |
| 223 | AIBinder_Class* AIBinder_Class_define(const char* interfaceDescriptor, |
| 224 | AIBinder_Class_onCreate onCreate, |
| 225 | AIBinder_Class_onDestroy onDestroy, |
| 226 | AIBinder_Class_onTransact onTransact) { |
| 227 | if (interfaceDescriptor == nullptr || onCreate == nullptr || onDestroy == nullptr || |
| 228 | onTransact == nullptr) { |
| 229 | return nullptr; |
| 230 | } |
| 231 | |
| 232 | return new AIBinder_Class(interfaceDescriptor, onCreate, onDestroy, onTransact); |
| 233 | } |
| 234 | |
Steven Moreland | 901c745 | 2018-09-04 16:17:28 -0700 | [diff] [blame] | 235 | void AIBinder_DeathRecipient::TransferDeathRecipient::binderDied(const wp<IBinder>& who) { |
| 236 | CHECK(who == mWho); |
| 237 | |
| 238 | mOnDied(mCookie); |
| 239 | mWho = nullptr; |
| 240 | } |
| 241 | |
| 242 | AIBinder_DeathRecipient::AIBinder_DeathRecipient(AIBinder_DeathRecipient_onBinderDied onDied) |
Steven Moreland | 6cf66ac | 2018-11-02 18:14:54 -0700 | [diff] [blame] | 243 | : mOnDied(onDied) { |
Steven Moreland | 901c745 | 2018-09-04 16:17:28 -0700 | [diff] [blame] | 244 | CHECK(onDied != nullptr); |
| 245 | } |
| 246 | |
| 247 | binder_status_t AIBinder_DeathRecipient::linkToDeath(AIBinder* binder, void* cookie) { |
| 248 | CHECK(binder != nullptr); |
| 249 | |
| 250 | std::lock_guard<std::mutex> l(mDeathRecipientsMutex); |
| 251 | |
| 252 | sp<TransferDeathRecipient> recipient = |
| 253 | new TransferDeathRecipient(binder->getBinder(), cookie, mOnDied); |
| 254 | |
Steven Moreland | 5d62e44 | 2018-09-13 15:01:02 -0700 | [diff] [blame] | 255 | status_t status = binder->getBinder()->linkToDeath(recipient, cookie, 0 /*flags*/); |
| 256 | if (status != STATUS_OK) { |
| 257 | return PruneStatusT(status); |
Steven Moreland | 901c745 | 2018-09-04 16:17:28 -0700 | [diff] [blame] | 258 | } |
| 259 | |
| 260 | mDeathRecipients.push_back(recipient); |
Steven Moreland | 5d62e44 | 2018-09-13 15:01:02 -0700 | [diff] [blame] | 261 | return STATUS_OK; |
Steven Moreland | 901c745 | 2018-09-04 16:17:28 -0700 | [diff] [blame] | 262 | } |
| 263 | |
| 264 | binder_status_t AIBinder_DeathRecipient::unlinkToDeath(AIBinder* binder, void* cookie) { |
| 265 | CHECK(binder != nullptr); |
| 266 | |
| 267 | std::lock_guard<std::mutex> l(mDeathRecipientsMutex); |
| 268 | |
| 269 | for (auto it = mDeathRecipients.rbegin(); it != mDeathRecipients.rend(); ++it) { |
| 270 | sp<TransferDeathRecipient> recipient = *it; |
| 271 | |
Steven Moreland | 5d62e44 | 2018-09-13 15:01:02 -0700 | [diff] [blame] | 272 | if (recipient->getCookie() == cookie && recipient->getWho() == binder->getBinder()) { |
Steven Moreland | 901c745 | 2018-09-04 16:17:28 -0700 | [diff] [blame] | 273 | mDeathRecipients.erase(it.base() - 1); |
| 274 | |
Steven Moreland | 5d62e44 | 2018-09-13 15:01:02 -0700 | [diff] [blame] | 275 | status_t status = binder->getBinder()->unlinkToDeath(recipient, cookie, 0 /*flags*/); |
| 276 | if (status != ::android::OK) { |
Steven Moreland | 901c745 | 2018-09-04 16:17:28 -0700 | [diff] [blame] | 277 | LOG(ERROR) << __func__ |
| 278 | << ": removed reference to death recipient but unlink failed."; |
| 279 | } |
Steven Moreland | 5d62e44 | 2018-09-13 15:01:02 -0700 | [diff] [blame] | 280 | return PruneStatusT(status); |
Steven Moreland | 901c745 | 2018-09-04 16:17:28 -0700 | [diff] [blame] | 281 | } |
| 282 | } |
| 283 | |
Steven Moreland | 5d62e44 | 2018-09-13 15:01:02 -0700 | [diff] [blame] | 284 | return STATUS_NAME_NOT_FOUND; |
Steven Moreland | 901c745 | 2018-09-04 16:17:28 -0700 | [diff] [blame] | 285 | } |
| 286 | |
| 287 | // start of C-API methods |
| 288 | |
Steven Moreland | 2e87adc | 2018-08-20 19:47:00 -0700 | [diff] [blame] | 289 | AIBinder* AIBinder_new(const AIBinder_Class* clazz, void* args) { |
| 290 | if (clazz == nullptr) { |
| 291 | LOG(ERROR) << __func__ << ": Must provide class to construct local binder."; |
| 292 | return nullptr; |
| 293 | } |
| 294 | |
| 295 | void* userData = clazz->onCreate(args); |
| 296 | |
Steven Moreland | 71cddc3 | 2018-08-30 23:39:22 -0700 | [diff] [blame] | 297 | sp<AIBinder> ret = new ABBinder(clazz, userData); |
| 298 | ABBinderTag::attach(ret->getBinder()); |
| 299 | |
| 300 | AIBinder_incStrong(ret.get()); |
| 301 | return ret.get(); |
Steven Moreland | 2e87adc | 2018-08-20 19:47:00 -0700 | [diff] [blame] | 302 | } |
| 303 | |
Steven Moreland | 5ea54da | 2018-09-04 13:29:55 -0700 | [diff] [blame] | 304 | bool AIBinder_isRemote(const AIBinder* binder) { |
Steven Moreland | 2e87adc | 2018-08-20 19:47:00 -0700 | [diff] [blame] | 305 | if (binder == nullptr) { |
Steven Moreland | 56f752a | 2018-11-05 17:23:37 -0800 | [diff] [blame] | 306 | return false; |
Steven Moreland | 2e87adc | 2018-08-20 19:47:00 -0700 | [diff] [blame] | 307 | } |
| 308 | |
| 309 | return binder->isRemote(); |
| 310 | } |
| 311 | |
Steven Moreland | 65867d7 | 2018-09-04 14:22:26 -0700 | [diff] [blame] | 312 | bool AIBinder_isAlive(const AIBinder* binder) { |
| 313 | if (binder == nullptr) { |
| 314 | return false; |
| 315 | } |
| 316 | |
| 317 | return const_cast<AIBinder*>(binder)->getBinder()->isBinderAlive(); |
| 318 | } |
| 319 | |
| 320 | binder_status_t AIBinder_ping(AIBinder* binder) { |
| 321 | if (binder == nullptr) { |
Steven Moreland | 5d62e44 | 2018-09-13 15:01:02 -0700 | [diff] [blame] | 322 | return STATUS_UNEXPECTED_NULL; |
Steven Moreland | 65867d7 | 2018-09-04 14:22:26 -0700 | [diff] [blame] | 323 | } |
| 324 | |
Steven Moreland | 5d62e44 | 2018-09-13 15:01:02 -0700 | [diff] [blame] | 325 | return PruneStatusT(binder->getBinder()->pingBinder()); |
Steven Moreland | 65867d7 | 2018-09-04 14:22:26 -0700 | [diff] [blame] | 326 | } |
| 327 | |
Steven Moreland | 901c745 | 2018-09-04 16:17:28 -0700 | [diff] [blame] | 328 | binder_status_t AIBinder_linkToDeath(AIBinder* binder, AIBinder_DeathRecipient* recipient, |
| 329 | void* cookie) { |
| 330 | if (binder == nullptr || recipient == nullptr) { |
| 331 | LOG(ERROR) << __func__ << ": Must provide binder and recipient."; |
Steven Moreland | 5d62e44 | 2018-09-13 15:01:02 -0700 | [diff] [blame] | 332 | return STATUS_UNEXPECTED_NULL; |
Steven Moreland | 901c745 | 2018-09-04 16:17:28 -0700 | [diff] [blame] | 333 | } |
| 334 | |
Steven Moreland | 5d62e44 | 2018-09-13 15:01:02 -0700 | [diff] [blame] | 335 | // returns binder_status_t |
Steven Moreland | 901c745 | 2018-09-04 16:17:28 -0700 | [diff] [blame] | 336 | return recipient->linkToDeath(binder, cookie); |
| 337 | } |
| 338 | |
| 339 | binder_status_t AIBinder_unlinkToDeath(AIBinder* binder, AIBinder_DeathRecipient* recipient, |
| 340 | void* cookie) { |
| 341 | if (binder == nullptr || recipient == nullptr) { |
| 342 | LOG(ERROR) << __func__ << ": Must provide binder and recipient."; |
Steven Moreland | 5d62e44 | 2018-09-13 15:01:02 -0700 | [diff] [blame] | 343 | return STATUS_UNEXPECTED_NULL; |
Steven Moreland | 901c745 | 2018-09-04 16:17:28 -0700 | [diff] [blame] | 344 | } |
| 345 | |
Steven Moreland | 5d62e44 | 2018-09-13 15:01:02 -0700 | [diff] [blame] | 346 | // returns binder_status_t |
Steven Moreland | 901c745 | 2018-09-04 16:17:28 -0700 | [diff] [blame] | 347 | return recipient->unlinkToDeath(binder, cookie); |
| 348 | } |
| 349 | |
Steven Moreland | f3034b0 | 2018-11-12 17:37:46 -0800 | [diff] [blame^] | 350 | uid_t AIBinder_getCallingUid() { |
| 351 | return ::android::IPCThreadState::self()->getCallingUid(); |
| 352 | } |
| 353 | |
| 354 | pid_t AIBinder_getCallingPid() { |
| 355 | return ::android::IPCThreadState::self()->getCallingPid(); |
| 356 | } |
| 357 | |
Steven Moreland | 2e87adc | 2018-08-20 19:47:00 -0700 | [diff] [blame] | 358 | void AIBinder_incStrong(AIBinder* binder) { |
| 359 | if (binder == nullptr) { |
| 360 | LOG(ERROR) << __func__ << ": on null binder"; |
| 361 | return; |
| 362 | } |
| 363 | |
| 364 | binder->incStrong(nullptr); |
| 365 | } |
| 366 | void AIBinder_decStrong(AIBinder* binder) { |
| 367 | if (binder == nullptr) { |
| 368 | LOG(ERROR) << __func__ << ": on null binder"; |
| 369 | return; |
| 370 | } |
| 371 | |
| 372 | binder->decStrong(nullptr); |
| 373 | } |
| 374 | int32_t AIBinder_debugGetRefCount(AIBinder* binder) { |
| 375 | if (binder == nullptr) { |
| 376 | LOG(ERROR) << __func__ << ": on null binder"; |
| 377 | return -1; |
| 378 | } |
| 379 | |
| 380 | return binder->getStrongCount(); |
| 381 | } |
| 382 | |
Steven Moreland | 71cddc3 | 2018-08-30 23:39:22 -0700 | [diff] [blame] | 383 | bool AIBinder_associateClass(AIBinder* binder, const AIBinder_Class* clazz) { |
| 384 | if (binder == nullptr) { |
| 385 | return false; |
Steven Moreland | 2e87adc | 2018-08-20 19:47:00 -0700 | [diff] [blame] | 386 | } |
| 387 | |
Steven Moreland | 71cddc3 | 2018-08-30 23:39:22 -0700 | [diff] [blame] | 388 | return binder->associateClass(clazz); |
Steven Moreland | 2e87adc | 2018-08-20 19:47:00 -0700 | [diff] [blame] | 389 | } |
| 390 | |
| 391 | const AIBinder_Class* AIBinder_getClass(AIBinder* binder) { |
| 392 | if (binder == nullptr) { |
| 393 | return nullptr; |
| 394 | } |
| 395 | |
| 396 | return binder->getClass(); |
| 397 | } |
| 398 | |
| 399 | void* AIBinder_getUserData(AIBinder* binder) { |
| 400 | if (binder == nullptr) { |
| 401 | return nullptr; |
| 402 | } |
| 403 | |
| 404 | ABBinder* bBinder = binder->asABBinder(); |
| 405 | if (bBinder == nullptr) { |
| 406 | return nullptr; |
| 407 | } |
| 408 | |
| 409 | return bBinder->getUserData(); |
| 410 | } |
| 411 | |
| 412 | binder_status_t AIBinder_prepareTransaction(AIBinder* binder, AParcel** in) { |
| 413 | if (binder == nullptr || in == nullptr) { |
| 414 | LOG(ERROR) << __func__ << ": requires non-null parameters."; |
Steven Moreland | 5d62e44 | 2018-09-13 15:01:02 -0700 | [diff] [blame] | 415 | return STATUS_UNEXPECTED_NULL; |
Steven Moreland | 2e87adc | 2018-08-20 19:47:00 -0700 | [diff] [blame] | 416 | } |
| 417 | const AIBinder_Class* clazz = binder->getClass(); |
| 418 | if (clazz == nullptr) { |
| 419 | LOG(ERROR) << __func__ |
| 420 | << ": Class must be defined for a remote binder transaction. See " |
| 421 | "AIBinder_associateClass."; |
Steven Moreland | 5d62e44 | 2018-09-13 15:01:02 -0700 | [diff] [blame] | 422 | return STATUS_INVALID_OPERATION; |
Steven Moreland | 2e87adc | 2018-08-20 19:47:00 -0700 | [diff] [blame] | 423 | } |
| 424 | |
Steven Moreland | 3527c2e | 2018-09-05 17:07:14 -0700 | [diff] [blame] | 425 | if (!binder->isRemote()) { |
Steven Moreland | 74521c8 | 2018-09-07 14:50:40 -0700 | [diff] [blame] | 426 | LOG(WARNING) << "A binder object at " << binder |
| 427 | << " is being transacted on, however, this object is in the same process as " |
| 428 | "its proxy. Transacting with this binder is expensive compared to just " |
| 429 | "calling the corresponding functionality in the same process."; |
Steven Moreland | 3527c2e | 2018-09-05 17:07:14 -0700 | [diff] [blame] | 430 | } |
| 431 | |
Steven Moreland | 2e87adc | 2018-08-20 19:47:00 -0700 | [diff] [blame] | 432 | *in = new AParcel(binder); |
Steven Moreland | f18615b | 2018-09-14 11:43:06 -0700 | [diff] [blame] | 433 | status_t status = (*in)->get()->writeInterfaceToken(clazz->getInterfaceDescriptor()); |
Steven Moreland | 5d62e44 | 2018-09-13 15:01:02 -0700 | [diff] [blame] | 434 | binder_status_t ret = PruneStatusT(status); |
| 435 | |
| 436 | if (ret != STATUS_OK) { |
Steven Moreland | 2e87adc | 2018-08-20 19:47:00 -0700 | [diff] [blame] | 437 | delete *in; |
| 438 | *in = nullptr; |
| 439 | } |
| 440 | |
Steven Moreland | 5d62e44 | 2018-09-13 15:01:02 -0700 | [diff] [blame] | 441 | return ret; |
Steven Moreland | 2e87adc | 2018-08-20 19:47:00 -0700 | [diff] [blame] | 442 | } |
| 443 | |
Steven Moreland | 9b80e28 | 2018-09-19 13:57:23 -0700 | [diff] [blame] | 444 | static void DestroyParcel(AParcel** parcel) { |
| 445 | delete *parcel; |
| 446 | *parcel = nullptr; |
| 447 | } |
| 448 | |
Steven Moreland | 2e87adc | 2018-08-20 19:47:00 -0700 | [diff] [blame] | 449 | binder_status_t AIBinder_transact(AIBinder* binder, transaction_code_t code, AParcel** in, |
| 450 | AParcel** out, binder_flags_t flags) { |
| 451 | if (in == nullptr) { |
| 452 | LOG(ERROR) << __func__ << ": requires non-null in parameter"; |
Steven Moreland | 5d62e44 | 2018-09-13 15:01:02 -0700 | [diff] [blame] | 453 | return STATUS_UNEXPECTED_NULL; |
Steven Moreland | 2e87adc | 2018-08-20 19:47:00 -0700 | [diff] [blame] | 454 | } |
| 455 | |
Steven Moreland | caa776c | 2018-09-04 13:48:11 -0700 | [diff] [blame] | 456 | using AutoParcelDestroyer = std::unique_ptr<AParcel*, void (*)(AParcel**)>; |
Steven Moreland | 2e87adc | 2018-08-20 19:47:00 -0700 | [diff] [blame] | 457 | // This object is the input to the transaction. This function takes ownership of it and deletes |
| 458 | // it. |
Steven Moreland | 9b80e28 | 2018-09-19 13:57:23 -0700 | [diff] [blame] | 459 | AutoParcelDestroyer forIn(in, DestroyParcel); |
Steven Moreland | 2e87adc | 2018-08-20 19:47:00 -0700 | [diff] [blame] | 460 | |
| 461 | if (!isUserCommand(code)) { |
| 462 | LOG(ERROR) << __func__ << ": Only user-defined transactions can be made from the NDK."; |
Steven Moreland | 5d62e44 | 2018-09-13 15:01:02 -0700 | [diff] [blame] | 463 | return STATUS_UNKNOWN_TRANSACTION; |
Steven Moreland | 2e87adc | 2018-08-20 19:47:00 -0700 | [diff] [blame] | 464 | } |
| 465 | |
| 466 | if ((flags & ~FLAG_ONEWAY) != 0) { |
| 467 | LOG(ERROR) << __func__ << ": Unrecognized flags sent: " << flags; |
Steven Moreland | 5d62e44 | 2018-09-13 15:01:02 -0700 | [diff] [blame] | 468 | return STATUS_BAD_VALUE; |
Steven Moreland | 2e87adc | 2018-08-20 19:47:00 -0700 | [diff] [blame] | 469 | } |
| 470 | |
| 471 | if (binder == nullptr || *in == nullptr || out == nullptr) { |
| 472 | LOG(ERROR) << __func__ << ": requires non-null parameters."; |
Steven Moreland | 5d62e44 | 2018-09-13 15:01:02 -0700 | [diff] [blame] | 473 | return STATUS_UNEXPECTED_NULL; |
Steven Moreland | 2e87adc | 2018-08-20 19:47:00 -0700 | [diff] [blame] | 474 | } |
| 475 | |
| 476 | if ((*in)->getBinder() != binder) { |
| 477 | LOG(ERROR) << __func__ << ": parcel is associated with binder object " << binder |
| 478 | << " but called with " << (*in)->getBinder(); |
Steven Moreland | 5d62e44 | 2018-09-13 15:01:02 -0700 | [diff] [blame] | 479 | return STATUS_BAD_VALUE; |
Steven Moreland | 2e87adc | 2018-08-20 19:47:00 -0700 | [diff] [blame] | 480 | } |
| 481 | |
| 482 | *out = new AParcel(binder); |
| 483 | |
Steven Moreland | f18615b | 2018-09-14 11:43:06 -0700 | [diff] [blame] | 484 | status_t status = binder->getBinder()->transact(code, *(*in)->get(), (*out)->get(), flags); |
Steven Moreland | 5d62e44 | 2018-09-13 15:01:02 -0700 | [diff] [blame] | 485 | binder_status_t ret = PruneStatusT(status); |
Steven Moreland | 2e87adc | 2018-08-20 19:47:00 -0700 | [diff] [blame] | 486 | |
Steven Moreland | 5d62e44 | 2018-09-13 15:01:02 -0700 | [diff] [blame] | 487 | if (ret != STATUS_OK) { |
Steven Moreland | 2e87adc | 2018-08-20 19:47:00 -0700 | [diff] [blame] | 488 | delete *out; |
| 489 | *out = nullptr; |
| 490 | } |
| 491 | |
Steven Moreland | 5d62e44 | 2018-09-13 15:01:02 -0700 | [diff] [blame] | 492 | return ret; |
Steven Moreland | 2e87adc | 2018-08-20 19:47:00 -0700 | [diff] [blame] | 493 | } |
Steven Moreland | 901c745 | 2018-09-04 16:17:28 -0700 | [diff] [blame] | 494 | |
| 495 | AIBinder_DeathRecipient* AIBinder_DeathRecipient_new( |
| 496 | AIBinder_DeathRecipient_onBinderDied onBinderDied) { |
| 497 | if (onBinderDied == nullptr) { |
| 498 | LOG(ERROR) << __func__ << ": requires non-null onBinderDied parameter."; |
| 499 | return nullptr; |
| 500 | } |
| 501 | return new AIBinder_DeathRecipient(onBinderDied); |
| 502 | } |
| 503 | |
Steven Moreland | 9b80e28 | 2018-09-19 13:57:23 -0700 | [diff] [blame] | 504 | void AIBinder_DeathRecipient_delete(AIBinder_DeathRecipient* recipient) { |
| 505 | delete recipient; |
Steven Moreland | 901c745 | 2018-09-04 16:17:28 -0700 | [diff] [blame] | 506 | } |