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250 lines
8.1 KiB
250 lines
8.1 KiB
/*
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* Copyright (C) 2015 The Android Open Source Project
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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#include <binder/Status.h>
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namespace android {
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namespace binder {
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Status Status::ok() {
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return Status();
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}
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Status Status::fromExceptionCode(int32_t exceptionCode) {
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if (exceptionCode == EX_TRANSACTION_FAILED) {
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return Status(exceptionCode, FAILED_TRANSACTION);
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}
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return Status(exceptionCode, OK);
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}
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Status Status::fromExceptionCode(int32_t exceptionCode,
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const String8& message) {
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if (exceptionCode == EX_TRANSACTION_FAILED) {
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return Status(exceptionCode, FAILED_TRANSACTION, message);
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}
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return Status(exceptionCode, OK, message);
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}
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Status Status::fromExceptionCode(int32_t exceptionCode,
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const char* message) {
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return fromExceptionCode(exceptionCode, String8(message));
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}
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Status Status::fromServiceSpecificError(int32_t serviceSpecificErrorCode) {
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return Status(EX_SERVICE_SPECIFIC, serviceSpecificErrorCode);
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}
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Status Status::fromServiceSpecificError(int32_t serviceSpecificErrorCode,
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const String8& message) {
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return Status(EX_SERVICE_SPECIFIC, serviceSpecificErrorCode, message);
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}
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Status Status::fromServiceSpecificError(int32_t serviceSpecificErrorCode,
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const char* message) {
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return fromServiceSpecificError(serviceSpecificErrorCode, String8(message));
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}
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Status Status::fromStatusT(status_t status) {
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Status ret;
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ret.setFromStatusT(status);
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return ret;
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}
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std::string Status::exceptionToString(int32_t exceptionCode) {
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switch (exceptionCode) {
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#define EXCEPTION_TO_CASE(EXCEPTION) case EXCEPTION: return #EXCEPTION;
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EXCEPTION_TO_CASE(EX_NONE)
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EXCEPTION_TO_CASE(EX_SECURITY)
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EXCEPTION_TO_CASE(EX_BAD_PARCELABLE)
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EXCEPTION_TO_CASE(EX_ILLEGAL_ARGUMENT)
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EXCEPTION_TO_CASE(EX_NULL_POINTER)
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EXCEPTION_TO_CASE(EX_ILLEGAL_STATE)
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EXCEPTION_TO_CASE(EX_NETWORK_MAIN_THREAD)
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EXCEPTION_TO_CASE(EX_UNSUPPORTED_OPERATION)
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EXCEPTION_TO_CASE(EX_SERVICE_SPECIFIC)
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EXCEPTION_TO_CASE(EX_PARCELABLE)
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EXCEPTION_TO_CASE(EX_HAS_REPLY_HEADER)
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EXCEPTION_TO_CASE(EX_TRANSACTION_FAILED)
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#undef EXCEPTION_TO_CASE
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default: return std::to_string(exceptionCode);
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}
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}
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Status::Status(int32_t exceptionCode, int32_t errorCode)
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: mException(exceptionCode),
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mErrorCode(errorCode) {}
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Status::Status(int32_t exceptionCode, int32_t errorCode, const String8& message)
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: mException(exceptionCode),
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mErrorCode(errorCode),
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mMessage(message) {}
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status_t Status::readFromParcel(const Parcel& parcel) {
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status_t status = parcel.readInt32(&mException);
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if (status != OK) {
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setFromStatusT(status);
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return status;
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}
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// Skip over fat response headers. Not used (or propagated) in native code.
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if (mException == EX_HAS_REPLY_HEADER) {
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// Note that the header size includes the 4 byte size field.
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const size_t header_start = parcel.dataPosition();
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// Get available size before reading more
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const size_t header_avail = parcel.dataAvail();
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int32_t header_size;
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status = parcel.readInt32(&header_size);
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if (status != OK) {
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setFromStatusT(status);
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return status;
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}
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if (header_size < 0 || static_cast<size_t>(header_size) > header_avail) {
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android_errorWriteLog(0x534e4554, "132650049");
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setFromStatusT(UNKNOWN_ERROR);
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return UNKNOWN_ERROR;
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}
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parcel.setDataPosition(header_start + header_size);
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// And fat response headers are currently only used when there are no
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// exceptions, so act like there was no error.
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mException = EX_NONE;
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}
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if (mException == EX_NONE) {
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return status;
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}
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// The remote threw an exception. Get the message back.
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String16 message;
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status = parcel.readString16(&message);
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if (status != OK) {
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setFromStatusT(status);
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return status;
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}
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mMessage = String8(message);
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// Skip over the remote stack trace data
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int32_t remote_stack_trace_header_size;
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status = parcel.readInt32(&remote_stack_trace_header_size);
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if (status != OK) {
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setFromStatusT(status);
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return status;
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}
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if (remote_stack_trace_header_size < 0 ||
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static_cast<size_t>(remote_stack_trace_header_size) > parcel.dataAvail()) {
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android_errorWriteLog(0x534e4554, "132650049");
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setFromStatusT(UNKNOWN_ERROR);
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return UNKNOWN_ERROR;
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}
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parcel.setDataPosition(parcel.dataPosition() + remote_stack_trace_header_size);
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if (mException == EX_SERVICE_SPECIFIC) {
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status = parcel.readInt32(&mErrorCode);
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} else if (mException == EX_PARCELABLE) {
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// Skip over the blob of Parcelable data
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const size_t header_start = parcel.dataPosition();
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// Get available size before reading more
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const size_t header_avail = parcel.dataAvail();
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int32_t header_size;
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status = parcel.readInt32(&header_size);
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if (status != OK) {
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setFromStatusT(status);
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return status;
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}
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if (header_size < 0 || static_cast<size_t>(header_size) > header_avail) {
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android_errorWriteLog(0x534e4554, "132650049");
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setFromStatusT(UNKNOWN_ERROR);
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return UNKNOWN_ERROR;
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}
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parcel.setDataPosition(header_start + header_size);
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}
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if (status != OK) {
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setFromStatusT(status);
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return status;
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}
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return status;
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}
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status_t Status::writeToParcel(Parcel* parcel) const {
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// Something really bad has happened, and we're not going to even
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// try returning rich error data.
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if (mException == EX_TRANSACTION_FAILED) {
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return mErrorCode;
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}
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status_t status = parcel->writeInt32(mException);
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if (status != OK) return status;
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if (mException == EX_NONE) {
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// We have no more information to write.
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return status;
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}
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status = parcel->writeString16(String16(mMessage));
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if (status != OK) return status;
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status = parcel->writeInt32(0); // Empty remote stack trace header
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if (status != OK) return status;
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if (mException == EX_SERVICE_SPECIFIC) {
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status = parcel->writeInt32(mErrorCode);
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} else if (mException == EX_PARCELABLE) {
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// Sending Parcelable blobs currently not supported
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status = parcel->writeInt32(0);
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}
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return status;
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}
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void Status::setException(int32_t ex, const String8& message) {
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mException = ex;
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mErrorCode = ex == EX_TRANSACTION_FAILED ? FAILED_TRANSACTION : NO_ERROR;
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mMessage.setTo(message);
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}
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void Status::setServiceSpecificError(int32_t errorCode, const String8& message) {
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setException(EX_SERVICE_SPECIFIC, message);
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mErrorCode = errorCode;
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}
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void Status::setFromStatusT(status_t status) {
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mException = (status == NO_ERROR) ? EX_NONE : EX_TRANSACTION_FAILED;
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mErrorCode = status;
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mMessage.clear();
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}
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String8 Status::toString8() const {
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String8 ret;
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if (mException == EX_NONE) {
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ret.append("No error");
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} else {
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ret.appendFormat("Status(%d, %s): '", mException, exceptionToString(mException).c_str());
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if (mException == EX_SERVICE_SPECIFIC) {
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ret.appendFormat("%d: ", mErrorCode);
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} else if (mException == EX_TRANSACTION_FAILED) {
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ret.appendFormat("%s: ", statusToString(mErrorCode).c_str());
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}
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ret.append(String8(mMessage));
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ret.append("'");
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}
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return ret;
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}
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} // namespace binder
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} // namespace android
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