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/*
* Copyright (C) 2015 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.
*/
#include <binder/Status.h>
namespace android {
namespace binder {
Status Status::ok() {
return Status();
}
Status Status::fromExceptionCode(int32_t exceptionCode) {
if (exceptionCode == EX_TRANSACTION_FAILED) {
return Status(exceptionCode, FAILED_TRANSACTION);
}
return Status(exceptionCode, OK);
}
Status Status::fromExceptionCode(int32_t exceptionCode,
const String8& message) {
if (exceptionCode == EX_TRANSACTION_FAILED) {
return Status(exceptionCode, FAILED_TRANSACTION, message);
}
return Status(exceptionCode, OK, message);
}
Status Status::fromExceptionCode(int32_t exceptionCode,
const char* message) {
return fromExceptionCode(exceptionCode, String8(message));
}
Status Status::fromServiceSpecificError(int32_t serviceSpecificErrorCode) {
return Status(EX_SERVICE_SPECIFIC, serviceSpecificErrorCode);
}
Status Status::fromServiceSpecificError(int32_t serviceSpecificErrorCode,
const String8& message) {
return Status(EX_SERVICE_SPECIFIC, serviceSpecificErrorCode, message);
}
Status Status::fromServiceSpecificError(int32_t serviceSpecificErrorCode,
const char* message) {
return fromServiceSpecificError(serviceSpecificErrorCode, String8(message));
}
Status Status::fromStatusT(status_t status) {
Status ret;
ret.setFromStatusT(status);
return ret;
}
std::string Status::exceptionToString(int32_t exceptionCode) {
switch (exceptionCode) {
#define EXCEPTION_TO_CASE(EXCEPTION) case EXCEPTION: return #EXCEPTION;
EXCEPTION_TO_CASE(EX_NONE)
EXCEPTION_TO_CASE(EX_SECURITY)
EXCEPTION_TO_CASE(EX_BAD_PARCELABLE)
EXCEPTION_TO_CASE(EX_ILLEGAL_ARGUMENT)
EXCEPTION_TO_CASE(EX_NULL_POINTER)
EXCEPTION_TO_CASE(EX_ILLEGAL_STATE)
EXCEPTION_TO_CASE(EX_NETWORK_MAIN_THREAD)
EXCEPTION_TO_CASE(EX_UNSUPPORTED_OPERATION)
EXCEPTION_TO_CASE(EX_SERVICE_SPECIFIC)
EXCEPTION_TO_CASE(EX_PARCELABLE)
EXCEPTION_TO_CASE(EX_HAS_REPLY_HEADER)
EXCEPTION_TO_CASE(EX_TRANSACTION_FAILED)
#undef EXCEPTION_TO_CASE
default: return std::to_string(exceptionCode);
}
}
Status::Status(int32_t exceptionCode, int32_t errorCode)
: mException(exceptionCode),
mErrorCode(errorCode) {}
Status::Status(int32_t exceptionCode, int32_t errorCode, const String8& message)
: mException(exceptionCode),
mErrorCode(errorCode),
mMessage(message) {}
status_t Status::readFromParcel(const Parcel& parcel) {
status_t status = parcel.readInt32(&mException);
if (status != OK) {
setFromStatusT(status);
return status;
}
// Skip over fat response headers. Not used (or propagated) in native code.
if (mException == EX_HAS_REPLY_HEADER) {
// Note that the header size includes the 4 byte size field.
const size_t header_start = parcel.dataPosition();
// Get available size before reading more
const size_t header_avail = parcel.dataAvail();
int32_t header_size;
status = parcel.readInt32(&header_size);
if (status != OK) {
setFromStatusT(status);
return status;
}
if (header_size < 0 || static_cast<size_t>(header_size) > header_avail) {
android_errorWriteLog(0x534e4554, "132650049");
setFromStatusT(UNKNOWN_ERROR);
return UNKNOWN_ERROR;
}
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.
mException = EX_NONE;
}
if (mException == EX_NONE) {
return status;
}
// The remote threw an exception. Get the message back.
String16 message;
status = parcel.readString16(&message);
if (status != OK) {
setFromStatusT(status);
return status;
}
mMessage = String8(message);
// Skip over the remote stack trace data
int32_t remote_stack_trace_header_size;
status = parcel.readInt32(&remote_stack_trace_header_size);
if (status != OK) {
setFromStatusT(status);
return status;
}
if (remote_stack_trace_header_size < 0 ||
static_cast<size_t>(remote_stack_trace_header_size) > parcel.dataAvail()) {
android_errorWriteLog(0x534e4554, "132650049");
setFromStatusT(UNKNOWN_ERROR);
return UNKNOWN_ERROR;
}
parcel.setDataPosition(parcel.dataPosition() + remote_stack_trace_header_size);
if (mException == EX_SERVICE_SPECIFIC) {
status = parcel.readInt32(&mErrorCode);
} else if (mException == EX_PARCELABLE) {
// Skip over the blob of Parcelable data
const size_t header_start = parcel.dataPosition();
// Get available size before reading more
const size_t header_avail = parcel.dataAvail();
int32_t header_size;
status = parcel.readInt32(&header_size);
if (status != OK) {
setFromStatusT(status);
return status;
}
if (header_size < 0 || static_cast<size_t>(header_size) > header_avail) {
android_errorWriteLog(0x534e4554, "132650049");
setFromStatusT(UNKNOWN_ERROR);
return UNKNOWN_ERROR;
}
parcel.setDataPosition(header_start + header_size);
}
if (status != OK) {
setFromStatusT(status);
return status;
}
return status;
}
status_t Status::writeToParcel(Parcel* parcel) const {
// Something really bad has happened, and we're not going to even
// try returning rich error data.
if (mException == EX_TRANSACTION_FAILED) {
return mErrorCode;
}
status_t status = parcel->writeInt32(mException);
if (status != OK) { return status; }
if (mException == EX_NONE) {
// We have no more information to write.
return status;
}
status = parcel->writeString16(String16(mMessage));
status = parcel->writeInt32(0); // Empty remote stack trace header
if (mException == EX_SERVICE_SPECIFIC) {
status = parcel->writeInt32(mErrorCode);
} else if (mException == EX_PARCELABLE) {
// Sending Parcelable blobs currently not supported
status = parcel->writeInt32(0);
}
return status;
}
void Status::setException(int32_t ex, const String8& message) {
mException = ex;
mErrorCode = ex == EX_TRANSACTION_FAILED ? FAILED_TRANSACTION : NO_ERROR;
mMessage.setTo(message);
}
void Status::setServiceSpecificError(int32_t errorCode, const String8& message) {
setException(EX_SERVICE_SPECIFIC, message);
mErrorCode = errorCode;
}
void Status::setFromStatusT(status_t status) {
mException = (status == NO_ERROR) ? EX_NONE : EX_TRANSACTION_FAILED;
mErrorCode = status;
mMessage.clear();
}
String8 Status::toString8() const {
String8 ret;
if (mException == EX_NONE) {
ret.append("No error");
} else {
ret.appendFormat("Status(%d, %s): '", mException, exceptionToString(mException).c_str());
if (mException == EX_SERVICE_SPECIFIC) {
ret.appendFormat("%d: ", mErrorCode);
} else if (mException == EX_TRANSACTION_FAILED) {
ret.appendFormat("%s: ", statusToString(mErrorCode).c_str());
}
ret.append(String8(mMessage));
ret.append("'");
}
return ret;
}
std::stringstream& operator<< (std::stringstream& stream, const Status& s) {
stream << s.toString8().string();
return stream;
}
} // namespace binder
} // namespace android
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