SharedMemoryParcelable.cpp revision a4eb0d86a29be2763be5fac51727858d5095794b
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); 53c0c70e3c7dd10bc2c0caffcab1f3f5fb406b35fbPhil Burk ALOGE_IF(status != NO_ERROR, "SharedMemoryParcelable writeDupFileDescriptor failed : %d", status); 54204a163c86f357a878873fe7d4c4164f3d55c9b6Phil Burk } 55c0c70e3c7dd10bc2c0caffcab1f3f5fb406b35fbPhil Burk return status; 56204a163c86f357a878873fe7d4c4164f3d55c9b6Phil Burk} 57204a163c86f357a878873fe7d4c4164f3d55c9b6Phil Burk 58204a163c86f357a878873fe7d4c4164f3d55c9b6Phil Burkstatus_t SharedMemoryParcelable::readFromParcel(const Parcel* parcel) { 59c0c70e3c7dd10bc2c0caffcab1f3f5fb406b35fbPhil Burk status_t status = parcel->readInt32(&mSizeInBytes); 60c0c70e3c7dd10bc2c0caffcab1f3f5fb406b35fbPhil Burk if (status != NO_ERROR) { 61c0c70e3c7dd10bc2c0caffcab1f3f5fb406b35fbPhil Burk return status; 62c0c70e3c7dd10bc2c0caffcab1f3f5fb406b35fbPhil Burk } 63204a163c86f357a878873fe7d4c4164f3d55c9b6Phil Burk if (mSizeInBytes > 0) { 64c0c70e3c7dd10bc2c0caffcab1f3f5fb406b35fbPhil Burk// FIXME mFd = dup(parcel->readFileDescriptor()); 65c0c70e3c7dd10bc2c0caffcab1f3f5fb406b35fbPhil Burk // Why is the ALSA resource not getting freed?! 66c0c70e3c7dd10bc2c0caffcab1f3f5fb406b35fbPhil Burk mFd = fcntl(parcel->readFileDescriptor(), F_DUPFD_CLOEXEC, 0); 67c0c70e3c7dd10bc2c0caffcab1f3f5fb406b35fbPhil Burk if (mFd == -1) { 68c0c70e3c7dd10bc2c0caffcab1f3f5fb406b35fbPhil Burk status = -errno; 69c0c70e3c7dd10bc2c0caffcab1f3f5fb406b35fbPhil Burk ALOGE("SharedMemoryParcelable readFileDescriptor fcntl() failed : %d", status); 70c0c70e3c7dd10bc2c0caffcab1f3f5fb406b35fbPhil Burk } 71204a163c86f357a878873fe7d4c4164f3d55c9b6Phil Burk } 72c0c70e3c7dd10bc2c0caffcab1f3f5fb406b35fbPhil Burk return status; 73204a163c86f357a878873fe7d4c4164f3d55c9b6Phil Burk} 74204a163c86f357a878873fe7d4c4164f3d55c9b6Phil Burk 75c0c70e3c7dd10bc2c0caffcab1f3f5fb406b35fbPhil Burkaaudio_result_t SharedMemoryParcelable::close() { 76c0c70e3c7dd10bc2c0caffcab1f3f5fb406b35fbPhil Burk if (mResolvedAddress != nullptr) { 77c0c70e3c7dd10bc2c0caffcab1f3f5fb406b35fbPhil Burk int err = munmap(mResolvedAddress, mSizeInBytes); 78c0c70e3c7dd10bc2c0caffcab1f3f5fb406b35fbPhil Burk if (err < 0) { 79c0c70e3c7dd10bc2c0caffcab1f3f5fb406b35fbPhil Burk ALOGE("SharedMemoryParcelable::close() munmap() failed %d", err); 80c0c70e3c7dd10bc2c0caffcab1f3f5fb406b35fbPhil Burk return AAudioConvert_androidToAAudioResult(err); 81c0c70e3c7dd10bc2c0caffcab1f3f5fb406b35fbPhil Burk } 82c0c70e3c7dd10bc2c0caffcab1f3f5fb406b35fbPhil Burk mResolvedAddress = nullptr; 83c0c70e3c7dd10bc2c0caffcab1f3f5fb406b35fbPhil Burk } 84c0c70e3c7dd10bc2c0caffcab1f3f5fb406b35fbPhil Burk if (mFd != -1) { 85c0c70e3c7dd10bc2c0caffcab1f3f5fb406b35fbPhil Burk ::close(mFd); 86c0c70e3c7dd10bc2c0caffcab1f3f5fb406b35fbPhil Burk mFd = -1; 87c0c70e3c7dd10bc2c0caffcab1f3f5fb406b35fbPhil Burk } 88c0c70e3c7dd10bc2c0caffcab1f3f5fb406b35fbPhil Burk return AAUDIO_OK; 89c0c70e3c7dd10bc2c0caffcab1f3f5fb406b35fbPhil Burk} 90204a163c86f357a878873fe7d4c4164f3d55c9b6Phil Burk 915ed503c7a66c90f93759c90237a9b432dbd93f9fPhil Burkaaudio_result_t SharedMemoryParcelable::resolve(int32_t offsetInBytes, int32_t sizeInBytes, 92204a163c86f357a878873fe7d4c4164f3d55c9b6Phil Burk void **regionAddressPtr) { 93c0c70e3c7dd10bc2c0caffcab1f3f5fb406b35fbPhil Burk 94204a163c86f357a878873fe7d4c4164f3d55c9b6Phil Burk if (offsetInBytes < 0) { 95204a163c86f357a878873fe7d4c4164f3d55c9b6Phil Burk ALOGE("SharedMemoryParcelable illegal offsetInBytes = %d", offsetInBytes); 965ed503c7a66c90f93759c90237a9b432dbd93f9fPhil Burk return AAUDIO_ERROR_OUT_OF_RANGE; 97204a163c86f357a878873fe7d4c4164f3d55c9b6Phil Burk } else if ((offsetInBytes + sizeInBytes) > mSizeInBytes) { 98204a163c86f357a878873fe7d4c4164f3d55c9b6Phil Burk ALOGE("SharedMemoryParcelable out of range, offsetInBytes = %d, " 99204a163c86f357a878873fe7d4c4164f3d55c9b6Phil Burk "sizeInBytes = %d, mSizeInBytes = %d", 100204a163c86f357a878873fe7d4c4164f3d55c9b6Phil Burk offsetInBytes, sizeInBytes, mSizeInBytes); 1015ed503c7a66c90f93759c90237a9b432dbd93f9fPhil Burk return AAUDIO_ERROR_OUT_OF_RANGE; 102204a163c86f357a878873fe7d4c4164f3d55c9b6Phil Burk } 103204a163c86f357a878873fe7d4c4164f3d55c9b6Phil Burk if (mResolvedAddress == nullptr) { 104c0c70e3c7dd10bc2c0caffcab1f3f5fb406b35fbPhil Burk /* TODO remove 105c0c70e3c7dd10bc2c0caffcab1f3f5fb406b35fbPhil Burk int fd = fcntl(mFd, F_DUPFD_CLOEXEC, 0); 106c0c70e3c7dd10bc2c0caffcab1f3f5fb406b35fbPhil Burk ALOGE_IF(fd==-1, "cannot dup fd=%d, size=%zd, (%s)", 107c0c70e3c7dd10bc2c0caffcab1f3f5fb406b35fbPhil Burk mFd, mSizeInBytes, strerror(errno)); 108c0c70e3c7dd10bc2c0caffcab1f3f5fb406b35fbPhil Burk */ 109204a163c86f357a878873fe7d4c4164f3d55c9b6Phil Burk mResolvedAddress = (uint8_t *) mmap(0, mSizeInBytes, PROT_READ|PROT_WRITE, 110204a163c86f357a878873fe7d4c4164f3d55c9b6Phil Burk MAP_SHARED, mFd, 0); 111204a163c86f357a878873fe7d4c4164f3d55c9b6Phil Burk if (mResolvedAddress == nullptr) { 112204a163c86f357a878873fe7d4c4164f3d55c9b6Phil Burk ALOGE("SharedMemoryParcelable mmap failed for fd = %d", mFd); 1135ed503c7a66c90f93759c90237a9b432dbd93f9fPhil Burk return AAUDIO_ERROR_INTERNAL; 114204a163c86f357a878873fe7d4c4164f3d55c9b6Phil Burk } 115204a163c86f357a878873fe7d4c4164f3d55c9b6Phil Burk } 116204a163c86f357a878873fe7d4c4164f3d55c9b6Phil Burk *regionAddressPtr = mResolvedAddress + offsetInBytes; 117c0c70e3c7dd10bc2c0caffcab1f3f5fb406b35fbPhil Burk ALOGV("SharedMemoryParcelable mResolvedAddress = %p", mResolvedAddress); 118c0c70e3c7dd10bc2c0caffcab1f3f5fb406b35fbPhil Burk ALOGV("SharedMemoryParcelable offset by %d, *regionAddressPtr = %p", 119204a163c86f357a878873fe7d4c4164f3d55c9b6Phil Burk offsetInBytes, *regionAddressPtr); 1205ed503c7a66c90f93759c90237a9b432dbd93f9fPhil Burk return AAUDIO_OK; 121204a163c86f357a878873fe7d4c4164f3d55c9b6Phil Burk} 122204a163c86f357a878873fe7d4c4164f3d55c9b6Phil Burk 123204a163c86f357a878873fe7d4c4164f3d55c9b6Phil Burkint32_t SharedMemoryParcelable::getSizeInBytes() { 124204a163c86f357a878873fe7d4c4164f3d55c9b6Phil Burk return mSizeInBytes; 125204a163c86f357a878873fe7d4c4164f3d55c9b6Phil Burk} 126204a163c86f357a878873fe7d4c4164f3d55c9b6Phil Burk 1275ed503c7a66c90f93759c90237a9b432dbd93f9fPhil Burkaaudio_result_t SharedMemoryParcelable::validate() { 1283df348fbaca567ca891503213ff8c344a1ea2e05Phil Burk if (mSizeInBytes < 0 || mSizeInBytes >= MAX_MMAP_SIZE_BYTES) { 129204a163c86f357a878873fe7d4c4164f3d55c9b6Phil Burk ALOGE("SharedMemoryParcelable invalid mSizeInBytes = %d", mSizeInBytes); 1303df348fbaca567ca891503213ff8c344a1ea2e05Phil Burk return AAUDIO_ERROR_OUT_OF_RANGE; 131204a163c86f357a878873fe7d4c4164f3d55c9b6Phil Burk } 132204a163c86f357a878873fe7d4c4164f3d55c9b6Phil Burk if (mSizeInBytes > 0) { 133204a163c86f357a878873fe7d4c4164f3d55c9b6Phil Burk if (mFd == -1) { 134204a163c86f357a878873fe7d4c4164f3d55c9b6Phil Burk ALOGE("SharedMemoryParcelable uninitialized mFd = %d", mFd); 1355ed503c7a66c90f93759c90237a9b432dbd93f9fPhil Burk return AAUDIO_ERROR_INTERNAL; 136204a163c86f357a878873fe7d4c4164f3d55c9b6Phil Burk } 137204a163c86f357a878873fe7d4c4164f3d55c9b6Phil Burk } 1385ed503c7a66c90f93759c90237a9b432dbd93f9fPhil Burk return AAUDIO_OK; 139204a163c86f357a878873fe7d4c4164f3d55c9b6Phil Burk} 140204a163c86f357a878873fe7d4c4164f3d55c9b6Phil Burk 141204a163c86f357a878873fe7d4c4164f3d55c9b6Phil Burkvoid SharedMemoryParcelable::dump() { 142204a163c86f357a878873fe7d4c4164f3d55c9b6Phil Burk ALOGD("SharedMemoryParcelable mFd = %d", mFd); 143204a163c86f357a878873fe7d4c4164f3d55c9b6Phil Burk ALOGD("SharedMemoryParcelable mSizeInBytes = %d", mSizeInBytes); 144204a163c86f357a878873fe7d4c4164f3d55c9b6Phil Burk ALOGD("SharedMemoryParcelable mResolvedAddress = %p", mResolvedAddress); 145204a163c86f357a878873fe7d4c4164f3d55c9b6Phil Burk} 146