SharedMemoryParcelable.cpp revision 87c9f646a94259d7c321c3b3d5947fa1778f5ac2
1204a163c86f357a878873fe7d4c4164f3d55c9b6Phil Burk/* 2204a163c86f357a878873fe7d4c4164f3d55c9b6Phil Burk * Copyright 2016 The Android Open Source Project 3204a163c86f357a878873fe7d4c4164f3d55c9b6Phil Burk * 4204a163c86f357a878873fe7d4c4164f3d55c9b6Phil Burk * Licensed under the Apache License, Version 2.0 (the "License"); 5204a163c86f357a878873fe7d4c4164f3d55c9b6Phil Burk * you may not use this file except in compliance with the License. 6204a163c86f357a878873fe7d4c4164f3d55c9b6Phil Burk * You may obtain a copy of the License at 7204a163c86f357a878873fe7d4c4164f3d55c9b6Phil Burk * 8204a163c86f357a878873fe7d4c4164f3d55c9b6Phil Burk * http://www.apache.org/licenses/LICENSE-2.0 9204a163c86f357a878873fe7d4c4164f3d55c9b6Phil Burk * 10204a163c86f357a878873fe7d4c4164f3d55c9b6Phil Burk * Unless required by applicable law or agreed to in writing, software 11204a163c86f357a878873fe7d4c4164f3d55c9b6Phil Burk * distributed under the License is distributed on an "AS IS" BASIS, 12204a163c86f357a878873fe7d4c4164f3d55c9b6Phil Burk * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 13204a163c86f357a878873fe7d4c4164f3d55c9b6Phil Burk * See the License for the specific language governing permissions and 14204a163c86f357a878873fe7d4c4164f3d55c9b6Phil Burk * limitations under the License. 15204a163c86f357a878873fe7d4c4164f3d55c9b6Phil Burk */ 16204a163c86f357a878873fe7d4c4164f3d55c9b6Phil Burk 17c0c70e3c7dd10bc2c0caffcab1f3f5fb406b35fbPhil Burk#define LOG_TAG "AAudio" 18c0c70e3c7dd10bc2c0caffcab1f3f5fb406b35fbPhil Burk//#define LOG_NDEBUG 0 19c0c70e3c7dd10bc2c0caffcab1f3f5fb406b35fbPhil Burk#include <utils/Log.h> 20c0c70e3c7dd10bc2c0caffcab1f3f5fb406b35fbPhil Burk 21204a163c86f357a878873fe7d4c4164f3d55c9b6Phil Burk#include <stdint.h> 22c0c70e3c7dd10bc2c0caffcab1f3f5fb406b35fbPhil Burk#include <stdio.h> 23204a163c86f357a878873fe7d4c4164f3d55c9b6Phil Burk 24204a163c86f357a878873fe7d4c4164f3d55c9b6Phil Burk#include <sys/mman.h> 25a4eb0d86a29be2763be5fac51727858d5095794bPhil Burk#include <aaudio/AAudio.h> 26204a163c86f357a878873fe7d4c4164f3d55c9b6Phil Burk 27204a163c86f357a878873fe7d4c4164f3d55c9b6Phil Burk#include <binder/Parcelable.h> 28c0c70e3c7dd10bc2c0caffcab1f3f5fb406b35fbPhil Burk#include <utility/AAudioUtilities.h> 29204a163c86f357a878873fe7d4c4164f3d55c9b6Phil Burk 30204a163c86f357a878873fe7d4c4164f3d55c9b6Phil Burk#include "binding/SharedMemoryParcelable.h" 31204a163c86f357a878873fe7d4c4164f3d55c9b6Phil Burk 32204a163c86f357a878873fe7d4c4164f3d55c9b6Phil Burkusing android::NO_ERROR; 33204a163c86f357a878873fe7d4c4164f3d55c9b6Phil Burkusing android::status_t; 34204a163c86f357a878873fe7d4c4164f3d55c9b6Phil Burkusing android::Parcel; 35204a163c86f357a878873fe7d4c4164f3d55c9b6Phil Burkusing android::Parcelable; 36204a163c86f357a878873fe7d4c4164f3d55c9b6Phil Burk 375ed503c7a66c90f93759c90237a9b432dbd93f9fPhil Burkusing namespace aaudio; 38204a163c86f357a878873fe7d4c4164f3d55c9b6Phil Burk 39204a163c86f357a878873fe7d4c4164f3d55c9b6Phil BurkSharedMemoryParcelable::SharedMemoryParcelable() {} 40204a163c86f357a878873fe7d4c4164f3d55c9b6Phil BurkSharedMemoryParcelable::~SharedMemoryParcelable() {}; 41204a163c86f357a878873fe7d4c4164f3d55c9b6Phil Burk 42204a163c86f357a878873fe7d4c4164f3d55c9b6Phil Burkvoid SharedMemoryParcelable::setup(int fd, int32_t sizeInBytes) { 43204a163c86f357a878873fe7d4c4164f3d55c9b6Phil Burk mFd = fd; 44204a163c86f357a878873fe7d4c4164f3d55c9b6Phil Burk mSizeInBytes = sizeInBytes; 45c0c70e3c7dd10bc2c0caffcab1f3f5fb406b35fbPhil Burk 46204a163c86f357a878873fe7d4c4164f3d55c9b6Phil Burk} 47204a163c86f357a878873fe7d4c4164f3d55c9b6Phil Burk 48204a163c86f357a878873fe7d4c4164f3d55c9b6Phil Burkstatus_t SharedMemoryParcelable::writeToParcel(Parcel* parcel) const { 49c0c70e3c7dd10bc2c0caffcab1f3f5fb406b35fbPhil Burk status_t status = parcel->writeInt32(mSizeInBytes); 50c0c70e3c7dd10bc2c0caffcab1f3f5fb406b35fbPhil Burk if (status != NO_ERROR) return status; 51204a163c86f357a878873fe7d4c4164f3d55c9b6Phil Burk if (mSizeInBytes > 0) { 52c0c70e3c7dd10bc2c0caffcab1f3f5fb406b35fbPhil Burk status = parcel->writeDupFileDescriptor(mFd); 53942bdc0aebc88dc8b12c0e7742ec0003bbb8b80fPhil Burk ALOGE_IF(status != NO_ERROR, "SharedMemoryParcelable writeDupFileDescriptor failed : %d", 54942bdc0aebc88dc8b12c0e7742ec0003bbb8b80fPhil Burk status); 55204a163c86f357a878873fe7d4c4164f3d55c9b6Phil Burk } 56c0c70e3c7dd10bc2c0caffcab1f3f5fb406b35fbPhil Burk return status; 57204a163c86f357a878873fe7d4c4164f3d55c9b6Phil Burk} 58204a163c86f357a878873fe7d4c4164f3d55c9b6Phil Burk 59204a163c86f357a878873fe7d4c4164f3d55c9b6Phil Burkstatus_t SharedMemoryParcelable::readFromParcel(const Parcel* parcel) { 60c0c70e3c7dd10bc2c0caffcab1f3f5fb406b35fbPhil Burk status_t status = parcel->readInt32(&mSizeInBytes); 61c0c70e3c7dd10bc2c0caffcab1f3f5fb406b35fbPhil Burk if (status != NO_ERROR) { 62c0c70e3c7dd10bc2c0caffcab1f3f5fb406b35fbPhil Burk return status; 63c0c70e3c7dd10bc2c0caffcab1f3f5fb406b35fbPhil Burk } 64204a163c86f357a878873fe7d4c4164f3d55c9b6Phil Burk if (mSizeInBytes > 0) { 6587c9f646a94259d7c321c3b3d5947fa1778f5ac2Phil Burk // Keep the original FD until you are done with the mFd. 6687c9f646a94259d7c321c3b3d5947fa1778f5ac2Phil Burk // If you close it in here then it will prevent mFd from working. 67942bdc0aebc88dc8b12c0e7742ec0003bbb8b80fPhil Burk mOriginalFd = parcel->readFileDescriptor(); 68942bdc0aebc88dc8b12c0e7742ec0003bbb8b80fPhil Burk ALOGV("SharedMemoryParcelable::readFromParcel() LEAK? mOriginalFd = %d\n", mOriginalFd); 69942bdc0aebc88dc8b12c0e7742ec0003bbb8b80fPhil Burk mFd = fcntl(mOriginalFd, F_DUPFD_CLOEXEC, 0); 70942bdc0aebc88dc8b12c0e7742ec0003bbb8b80fPhil Burk ALOGV("SharedMemoryParcelable::readFromParcel() LEAK? mFd = %d\n", mFd); 71c0c70e3c7dd10bc2c0caffcab1f3f5fb406b35fbPhil Burk if (mFd == -1) { 72c0c70e3c7dd10bc2c0caffcab1f3f5fb406b35fbPhil Burk status = -errno; 73942bdc0aebc88dc8b12c0e7742ec0003bbb8b80fPhil Burk ALOGE("SharedMemoryParcelable readFromParcel fcntl() failed : %d", status); 74c0c70e3c7dd10bc2c0caffcab1f3f5fb406b35fbPhil Burk } 75204a163c86f357a878873fe7d4c4164f3d55c9b6Phil Burk } 76c0c70e3c7dd10bc2c0caffcab1f3f5fb406b35fbPhil Burk return status; 77204a163c86f357a878873fe7d4c4164f3d55c9b6Phil Burk} 78204a163c86f357a878873fe7d4c4164f3d55c9b6Phil Burk 79c0c70e3c7dd10bc2c0caffcab1f3f5fb406b35fbPhil Burkaaudio_result_t SharedMemoryParcelable::close() { 80478d5df3a0e1693669f5809176d5c7f6e8c9aa88Phil Burk if (mResolvedAddress != MMAP_UNRESOLVED_ADDRESS) { 81c0c70e3c7dd10bc2c0caffcab1f3f5fb406b35fbPhil Burk int err = munmap(mResolvedAddress, mSizeInBytes); 82c0c70e3c7dd10bc2c0caffcab1f3f5fb406b35fbPhil Burk if (err < 0) { 83c0c70e3c7dd10bc2c0caffcab1f3f5fb406b35fbPhil Burk ALOGE("SharedMemoryParcelable::close() munmap() failed %d", err); 84c0c70e3c7dd10bc2c0caffcab1f3f5fb406b35fbPhil Burk return AAudioConvert_androidToAAudioResult(err); 85c0c70e3c7dd10bc2c0caffcab1f3f5fb406b35fbPhil Burk } 86478d5df3a0e1693669f5809176d5c7f6e8c9aa88Phil Burk mResolvedAddress = MMAP_UNRESOLVED_ADDRESS; 87c0c70e3c7dd10bc2c0caffcab1f3f5fb406b35fbPhil Burk } 88c0c70e3c7dd10bc2c0caffcab1f3f5fb406b35fbPhil Burk if (mFd != -1) { 89942bdc0aebc88dc8b12c0e7742ec0003bbb8b80fPhil Burk ALOGV("SharedMemoryParcelable::close() LEAK? mFd = %d\n", mFd); 90c0c70e3c7dd10bc2c0caffcab1f3f5fb406b35fbPhil Burk ::close(mFd); 91c0c70e3c7dd10bc2c0caffcab1f3f5fb406b35fbPhil Burk mFd = -1; 92c0c70e3c7dd10bc2c0caffcab1f3f5fb406b35fbPhil Burk } 93942bdc0aebc88dc8b12c0e7742ec0003bbb8b80fPhil Burk if (mOriginalFd != -1) { 94942bdc0aebc88dc8b12c0e7742ec0003bbb8b80fPhil Burk ALOGV("SharedMemoryParcelable::close() LEAK? mOriginalFd = %d\n", mOriginalFd); 95942bdc0aebc88dc8b12c0e7742ec0003bbb8b80fPhil Burk ::close(mOriginalFd); 96942bdc0aebc88dc8b12c0e7742ec0003bbb8b80fPhil Burk mOriginalFd = -1; 97942bdc0aebc88dc8b12c0e7742ec0003bbb8b80fPhil Burk } 98c0c70e3c7dd10bc2c0caffcab1f3f5fb406b35fbPhil Burk return AAUDIO_OK; 99c0c70e3c7dd10bc2c0caffcab1f3f5fb406b35fbPhil Burk} 100204a163c86f357a878873fe7d4c4164f3d55c9b6Phil Burk 1015ed503c7a66c90f93759c90237a9b432dbd93f9fPhil Burkaaudio_result_t SharedMemoryParcelable::resolve(int32_t offsetInBytes, int32_t sizeInBytes, 102204a163c86f357a878873fe7d4c4164f3d55c9b6Phil Burk void **regionAddressPtr) { 103c0c70e3c7dd10bc2c0caffcab1f3f5fb406b35fbPhil Burk 104204a163c86f357a878873fe7d4c4164f3d55c9b6Phil Burk if (offsetInBytes < 0) { 105204a163c86f357a878873fe7d4c4164f3d55c9b6Phil Burk ALOGE("SharedMemoryParcelable illegal offsetInBytes = %d", offsetInBytes); 1065ed503c7a66c90f93759c90237a9b432dbd93f9fPhil Burk return AAUDIO_ERROR_OUT_OF_RANGE; 107204a163c86f357a878873fe7d4c4164f3d55c9b6Phil Burk } else if ((offsetInBytes + sizeInBytes) > mSizeInBytes) { 108204a163c86f357a878873fe7d4c4164f3d55c9b6Phil Burk ALOGE("SharedMemoryParcelable out of range, offsetInBytes = %d, " 109204a163c86f357a878873fe7d4c4164f3d55c9b6Phil Burk "sizeInBytes = %d, mSizeInBytes = %d", 110204a163c86f357a878873fe7d4c4164f3d55c9b6Phil Burk offsetInBytes, sizeInBytes, mSizeInBytes); 1115ed503c7a66c90f93759c90237a9b432dbd93f9fPhil Burk return AAUDIO_ERROR_OUT_OF_RANGE; 112204a163c86f357a878873fe7d4c4164f3d55c9b6Phil Burk } 113478d5df3a0e1693669f5809176d5c7f6e8c9aa88Phil Burk if (mResolvedAddress == MMAP_UNRESOLVED_ADDRESS) { 114204a163c86f357a878873fe7d4c4164f3d55c9b6Phil Burk mResolvedAddress = (uint8_t *) mmap(0, mSizeInBytes, PROT_READ|PROT_WRITE, 115204a163c86f357a878873fe7d4c4164f3d55c9b6Phil Burk MAP_SHARED, mFd, 0); 116478d5df3a0e1693669f5809176d5c7f6e8c9aa88Phil Burk if (mResolvedAddress == MMAP_UNRESOLVED_ADDRESS) { 117478d5df3a0e1693669f5809176d5c7f6e8c9aa88Phil Burk ALOGE("SharedMemoryParcelable mmap failed for fd = %d, errno = %s", 118478d5df3a0e1693669f5809176d5c7f6e8c9aa88Phil Burk mFd, strerror(errno)); 1195ed503c7a66c90f93759c90237a9b432dbd93f9fPhil Burk return AAUDIO_ERROR_INTERNAL; 120204a163c86f357a878873fe7d4c4164f3d55c9b6Phil Burk } 121204a163c86f357a878873fe7d4c4164f3d55c9b6Phil Burk } 122204a163c86f357a878873fe7d4c4164f3d55c9b6Phil Burk *regionAddressPtr = mResolvedAddress + offsetInBytes; 123c0c70e3c7dd10bc2c0caffcab1f3f5fb406b35fbPhil Burk ALOGV("SharedMemoryParcelable mResolvedAddress = %p", mResolvedAddress); 124c0c70e3c7dd10bc2c0caffcab1f3f5fb406b35fbPhil Burk ALOGV("SharedMemoryParcelable offset by %d, *regionAddressPtr = %p", 125204a163c86f357a878873fe7d4c4164f3d55c9b6Phil Burk offsetInBytes, *regionAddressPtr); 1265ed503c7a66c90f93759c90237a9b432dbd93f9fPhil Burk return AAUDIO_OK; 127204a163c86f357a878873fe7d4c4164f3d55c9b6Phil Burk} 128204a163c86f357a878873fe7d4c4164f3d55c9b6Phil Burk 129204a163c86f357a878873fe7d4c4164f3d55c9b6Phil Burkint32_t SharedMemoryParcelable::getSizeInBytes() { 130204a163c86f357a878873fe7d4c4164f3d55c9b6Phil Burk return mSizeInBytes; 131204a163c86f357a878873fe7d4c4164f3d55c9b6Phil Burk} 132204a163c86f357a878873fe7d4c4164f3d55c9b6Phil Burk 1335ed503c7a66c90f93759c90237a9b432dbd93f9fPhil Burkaaudio_result_t SharedMemoryParcelable::validate() { 1343df348fbaca567ca891503213ff8c344a1ea2e05Phil Burk if (mSizeInBytes < 0 || mSizeInBytes >= MAX_MMAP_SIZE_BYTES) { 135204a163c86f357a878873fe7d4c4164f3d55c9b6Phil Burk ALOGE("SharedMemoryParcelable invalid mSizeInBytes = %d", mSizeInBytes); 1363df348fbaca567ca891503213ff8c344a1ea2e05Phil Burk return AAUDIO_ERROR_OUT_OF_RANGE; 137204a163c86f357a878873fe7d4c4164f3d55c9b6Phil Burk } 138204a163c86f357a878873fe7d4c4164f3d55c9b6Phil Burk if (mSizeInBytes > 0) { 139204a163c86f357a878873fe7d4c4164f3d55c9b6Phil Burk if (mFd == -1) { 140204a163c86f357a878873fe7d4c4164f3d55c9b6Phil Burk ALOGE("SharedMemoryParcelable uninitialized mFd = %d", mFd); 1415ed503c7a66c90f93759c90237a9b432dbd93f9fPhil Burk return AAUDIO_ERROR_INTERNAL; 142204a163c86f357a878873fe7d4c4164f3d55c9b6Phil Burk } 143204a163c86f357a878873fe7d4c4164f3d55c9b6Phil Burk } 1445ed503c7a66c90f93759c90237a9b432dbd93f9fPhil Burk return AAUDIO_OK; 145204a163c86f357a878873fe7d4c4164f3d55c9b6Phil Burk} 146204a163c86f357a878873fe7d4c4164f3d55c9b6Phil Burk 147204a163c86f357a878873fe7d4c4164f3d55c9b6Phil Burkvoid SharedMemoryParcelable::dump() { 148204a163c86f357a878873fe7d4c4164f3d55c9b6Phil Burk ALOGD("SharedMemoryParcelable mFd = %d", mFd); 149204a163c86f357a878873fe7d4c4164f3d55c9b6Phil Burk ALOGD("SharedMemoryParcelable mSizeInBytes = %d", mSizeInBytes); 150204a163c86f357a878873fe7d4c4164f3d55c9b6Phil Burk ALOGD("SharedMemoryParcelable mResolvedAddress = %p", mResolvedAddress); 151204a163c86f357a878873fe7d4c4164f3d55c9b6Phil Burk} 152