| /* |
| * Copyright (C) 2016 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. |
| */ |
| |
| #define LOG_TAG "HidlSupport" |
| |
| #include <hidl/HidlBinderSupport.h> |
| |
| // C includes |
| #include <inttypes.h> |
| #include <unistd.h> |
| |
| // C++ includes |
| #include <fstream> |
| #include <sstream> |
| |
| namespace android { |
| namespace hardware { |
| |
| hidl_binder_death_recipient::hidl_binder_death_recipient(const sp<hidl_death_recipient> &recipient, |
| uint64_t cookie, const sp<::android::hidl::base::V1_0::IBase> &base) : |
| mRecipient(recipient), mCookie(cookie), mBase(base) { |
| } |
| |
| void hidl_binder_death_recipient::binderDied(const wp<IBinder>& /*who*/) { |
| sp<hidl_death_recipient> recipient = mRecipient.promote(); |
| if (recipient != nullptr && mBase != nullptr) { |
| recipient->serviceDied(mCookie, mBase); |
| } |
| mBase = nullptr; |
| } |
| |
| wp<hidl_death_recipient> hidl_binder_death_recipient::getRecipient() { |
| return mRecipient; |
| } |
| |
| const size_t hidl_memory::kOffsetOfHandle = offsetof(hidl_memory, mHandle); |
| const size_t hidl_memory::kOffsetOfName = offsetof(hidl_memory, mName); |
| static_assert(hidl_memory::kOffsetOfHandle == 0, "wrong offset"); |
| static_assert(hidl_memory::kOffsetOfName == 24, "wrong offset"); |
| |
| status_t readEmbeddedFromParcel(const hidl_memory& memory, |
| const Parcel &parcel, size_t parentHandle, size_t parentOffset) { |
| const native_handle_t *handle; |
| ::android::status_t _hidl_err = parcel.readNullableEmbeddedNativeHandle( |
| parentHandle, |
| parentOffset + hidl_memory::kOffsetOfHandle, |
| &handle); |
| |
| if (_hidl_err == ::android::OK) { |
| _hidl_err = readEmbeddedFromParcel( |
| memory.name(), |
| parcel, |
| parentHandle, |
| parentOffset + hidl_memory::kOffsetOfName); |
| } |
| |
| // hidl_memory's size is stored in uint64_t, but mapMemory's mmap will map |
| // size in size_t. If size is over SIZE_MAX, mapMemory could succeed |
| // but the mapped memory's actual size will be smaller than the reported size. |
| if (memory.size() > SIZE_MAX) { |
| ALOGE("Cannot use memory with %" PRId64 " bytes because it is too large.", memory.size()); |
| android_errorWriteLog(0x534e4554, "79376389"); |
| return BAD_VALUE; |
| } |
| |
| return _hidl_err; |
| } |
| |
| status_t writeEmbeddedToParcel(const hidl_memory &memory, |
| Parcel *parcel, size_t parentHandle, size_t parentOffset) { |
| status_t _hidl_err = parcel->writeEmbeddedNativeHandle( |
| memory.handle(), |
| parentHandle, |
| parentOffset + hidl_memory::kOffsetOfHandle); |
| |
| if (_hidl_err == ::android::OK) { |
| _hidl_err = writeEmbeddedToParcel( |
| memory.name(), |
| parcel, |
| parentHandle, |
| parentOffset + hidl_memory::kOffsetOfName); |
| } |
| |
| return _hidl_err; |
| } |
| const size_t hidl_string::kOffsetOfBuffer = offsetof(hidl_string, mBuffer); |
| static_assert(hidl_string::kOffsetOfBuffer == 0, "wrong offset"); |
| |
| status_t readEmbeddedFromParcel(const hidl_string &string , |
| const Parcel &parcel, size_t parentHandle, size_t parentOffset) { |
| const void *out; |
| |
| status_t status = parcel.readEmbeddedBuffer( |
| string.size() + 1, |
| nullptr /* buffer_handle */, |
| parentHandle, |
| parentOffset + hidl_string::kOffsetOfBuffer, |
| &out); |
| |
| if (status != OK) { |
| return status; |
| } |
| |
| // Always safe to access out[string.size()] because we read size+1 bytes |
| if (static_cast<const char *>(out)[string.size()] != '\0') { |
| ALOGE("Received unterminated hidl_string buffer."); |
| return BAD_VALUE; |
| } |
| |
| return OK; |
| } |
| |
| status_t writeEmbeddedToParcel(const hidl_string &string, |
| Parcel *parcel, size_t parentHandle, size_t parentOffset) { |
| return parcel->writeEmbeddedBuffer( |
| string.c_str(), |
| string.size() + 1, |
| nullptr /* handle */, |
| parentHandle, |
| parentOffset + hidl_string::kOffsetOfBuffer); |
| } |
| |
| android::status_t writeToParcel(const hidl_version &version, android::hardware::Parcel& parcel) { |
| return parcel.writeUint32(static_cast<uint32_t>(version.get_major()) << 16 | version.get_minor()); |
| } |
| |
| hidl_version* readFromParcel(const android::hardware::Parcel& parcel) { |
| uint32_t version; |
| android::status_t status = parcel.readUint32(&version); |
| if (status != OK) { |
| return nullptr; |
| } else { |
| return new hidl_version(version >> 16, version & 0xFFFF); |
| } |
| } |
| |
| status_t readFromParcel(Status *s, const Parcel& parcel) { |
| int32_t exception; |
| status_t status = parcel.readInt32(&exception); |
| if (status != OK) { |
| s->setFromStatusT(status); |
| return status; |
| } |
| |
| // Skip over fat response headers. Not used (or propagated) in native code. |
| if (exception == Status::EX_HAS_REPLY_HEADER) { |
| // Note that the header size includes the 4 byte size field. |
| const int32_t header_start = parcel.dataPosition(); |
| int32_t header_size; |
| status = parcel.readInt32(&header_size); |
| if (status != OK) { |
| s->setFromStatusT(status); |
| return status; |
| } |
| parcel.setDataPosition(header_start + header_size); |
| // And fat response headers are currently only used when there are no |
| // exceptions, so act like there was no error. |
| exception = Status::EX_NONE; |
| } |
| |
| if (exception == Status::EX_NONE) { |
| *s = Status::ok(); |
| return status; |
| } |
| |
| // The remote threw an exception. Get the message back. |
| String16 message; |
| status = parcel.readString16(&message); |
| if (status != OK) { |
| s->setFromStatusT(status); |
| return status; |
| } |
| |
| s->setException(exception, String8(message)); |
| |
| return status; |
| } |
| |
| status_t writeToParcel(const Status &s, Parcel* parcel) { |
| // Something really bad has happened, and we're not going to even |
| // try returning rich error data. |
| if (s.exceptionCode() == Status::EX_TRANSACTION_FAILED) { |
| return s.transactionError(); |
| } |
| |
| status_t status = parcel->writeInt32(s.exceptionCode()); |
| if (status != OK) { return status; } |
| if (s.exceptionCode() == Status::EX_NONE) { |
| // We have no more information to write. |
| return status; |
| } |
| status = parcel->writeString16(String16(s.exceptionMessage())); |
| return status; |
| } |
| |
| void configureBinderRpcThreadpool(size_t maxThreads, bool callerWillJoin) { |
| ProcessState::self()->setThreadPoolConfiguration(maxThreads, callerWillJoin /*callerJoinsPool*/); |
| } |
| |
| void joinBinderRpcThreadpool() { |
| IPCThreadState::self()->joinThreadPool(); |
| } |
| |
| int setupBinderPolling() { |
| int fd; |
| int err = IPCThreadState::self()->setupPolling(&fd); |
| |
| if (err != OK) { |
| ALOGE("Failed to setup binder polling: %d (%s)", err, strerror(err)); |
| } |
| |
| return err == OK ? fd : -1; |
| } |
| |
| status_t handleBinderPoll() { |
| return IPCThreadState::self()->handlePolledCommands(); |
| } |
| |
| } // namespace hardware |
| } // namespace android |