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Truffle is a multi-language framework for executing dynamic languages
that achieves high performance when combined with Graal.
/*
* Copyright (c) 2017, 2020, Oracle and/or its affiliates. All rights reserved.
* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
*
* The Universal Permissive License (UPL), Version 1.0
*
* Subject to the condition set forth below, permission is hereby granted to any
* person obtaining a copy of this software, associated documentation and/or
* data (collectively the "Software"), free of charge and under any and all
* copyright rights in the Software, and any and all patent rights owned or
* freely licensable by each licensor hereunder covering either (i) the
* unmodified Software as contributed to or provided by such licensor, or (ii)
* the Larger Works (as defined below), to deal in both
*
* (a) the Software, and
*
* (b) any piece of software and/or hardware listed in the lrgrwrks.txt file if
* one is included with the Software each a "Larger Work" to which the Software
* is contributed by such licensors),
*
* without restriction, including without limitation the rights to copy, create
* derivative works of, display, perform, and distribute the Software and make,
* use, sell, offer for sale, import, export, have made, and have sold the
* Software and the Larger Work(s), and to sublicense the foregoing rights on
* either these or other terms.
*
* This license is subject to the following condition:
*
* The above copyright notice and either this complete permission notice or at a
* minimum a reference to the UPL must be included in all copies or substantial
* portions of the Software.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
* AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
* OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
* SOFTWARE.
*/
package com.oracle.truffle.api;
import com.oracle.truffle.api.nodes.Node;
import com.oracle.truffle.api.nodes.RootNode;
import com.oracle.truffle.api.source.SourceSection;
/**
* Represents an exception thrown during the execution of a guest language program. All exceptions
* thrown in a guest language implementation that are not implementing {@link TruffleException} are
* considered internal errors.
*
* {@link TruffleException} is most efficient if the {@link Throwable#getCause() cause} is left
* uninitialized. Implementations of {@link TruffleException} also should not prevent initialization
* of the exception cause, e.g., by overriding {@link Throwable#initCause(Throwable)}.
*
* In order to be efficient, a {@link TruffleException} should override
* {@link Throwable#fillInStackTrace()} without the {@code synchronized} modifier, so that it
* returns {@code this}:
*
*
* @SuppressWarnings("sync-override")
* @Override
* public final Throwable fillInStackTrace() {
* return this;
* }
*
*
* @since 0.27
* @see TruffleStackTrace TruffleStackTrace to access the stack trace of an exception.
* @deprecated Use {@link com.oracle.truffle.api.exception.AbstractTruffleException} as a base class
* for Truffle exceptions.
*/
@Deprecated
public interface TruffleException {
/**
* Returns a node indicating the location where this exception occurred in the AST. This method
* may return null to indicate that the location is not available.
*
* @since 0.27
* @deprecated Pass the location into the
* {@link com.oracle.truffle.api.exception.AbstractTruffleException#AbstractTruffleException(Node location)
* AbstractTruffleException constructor}.
*/
@Deprecated
Node getLocation();
/**
* Returns an additional guest language object. The return object must be an interop type so it
* must be either implementing TruffleObject or be a primitive value. The default implementation
* returns null to indicate that no object is available for this exception.
*
* @since 0.27
* @deprecated The {@link com.oracle.truffle.api.exception.AbstractTruffleException} is itself
* an interop object. When a delegation to an existing interop object is needed use
* the {@code @ExportLibrary(delegateTo=...)} to forward interop messages to a guest
* object stored inside of the exception. In case of delegation the default export
* for the {@link com.oracle.truffle.api.exception.AbstractTruffleException} is not
* used and all the interop exception messages have to be implemented.
*/
@Deprecated
default Object getExceptionObject() {
return null;
}
/**
* Returns true if this exception indicates a parser or syntax error. Syntax errors
* typically occur while
* {@link TruffleLanguage#parse(com.oracle.truffle.api.TruffleLanguage.ParsingRequest) parsing}
* of guest language source code.
*
* @since 0.27
* @deprecated Return {@link com.oracle.truffle.api.interop.ExceptionType#PARSE_ERROR} in the
* {@link {@link com.oracle.truffle.api.interop.interop.InteropLibrary#getExceptionType(Object)}
* message implementation. See
* {@link com.oracle.truffle.api.exception.AbstractTruffleException} for a sample
* implementation of a syntax error.
*/
@Deprecated
default boolean isSyntaxError() {
return false;
}
/**
* Returns true if this exception indicates a syntax error that is indicating that
* the syntax is incomplete. This allows guest language programmers to find out if more code is
* expected from a given source. For example an incomplete JavaScript program could look like
* this:
*
*
* function incompleteFunction(arg) {
*
*
* A shell might react to this exception and prompt for additional source code, if this method
* returns true.
*
* @since 0.27
* @deprecated Implement the
* {@link com.oracle.truffle.api.interop.interop.InteropLibrary#isExceptionIncompleteSource(Object)}
* message. See {@link com.oracle.truffle.api.exception.AbstractTruffleException}
* for a sample implementation of a syntax error.
*/
@Deprecated
default boolean isIncompleteSource() {
return false;
}
/**
* Returns true if this exception indicates an internal error. Note that all
* exceptions thrown in a guest language implementation that are not implementing
* {@link TruffleException} are considered internal.
*
* @since 0.27
* @deprecated The internal errors are no more {@link TruffleException}s.
*/
@Deprecated
default boolean isInternalError() {
return false;
}
/**
* Returns true if this exception indicates that guest language application was
* cancelled during its execution. If {@code isCancelled} returns {@code true} languages should
* not catch this exception, they must just rethrow it.
*
* @since 0.27
* @deprecated Use {@link TruffleContext#closeCancelled(Node, String)} for a correct context
* cancellation.
*/
@Deprecated
default boolean isCancelled() {
return false;
}
/**
* Returns true if the exception indicates that the application was exited within
* the guest language program. If {@code isExit()} returns true also
* {@code getExitStatus()} should be implemented.
*
* @see #getExitStatus()
* @since 0.27
* @deprecated Return {@link com.oracle.truffle.api.interop.ExceptionType#EXIT} in the
* {@link {@link com.oracle.truffle.api.interop.interop.InteropLibrary#getExceptionType(Object)}
* message implementation. See
* {@link com.oracle.truffle.api.exception.AbstractTruffleException} for a sample
* implementation of an exit exception.
*/
@Deprecated
default boolean isExit() {
return false;
}
/**
* Returns the exit status if this exception indicates that the application was exited. The exit
* status is intended to be passed to {@link System#exit(int)}.
*
* @since 0.27
* @deprecated Implement the
* {@link com.oracle.truffle.api.interop.interop.InteropLibrary#getExceptionExitStatus(Object)}
* message. See {@link com.oracle.truffle.api.exception.AbstractTruffleException}
* for a sample implementation of an exit exception.
*/
@Deprecated
default int getExitStatus() {
return 0;
}
/**
* Returns the number of guest language frames that should be collected for this exception.
* Returns a negative integer by default for unlimited guest language frames. This is intended
* to be used by guest languages to limit the number of guest language stack frames. Languages
* might want to limit the number of frames for performance reasons. Only frames whose
* {@link RootNode#countsTowardsStackTraceLimit()} method return true count towards the limit.
*
* @since 0.27
* @deprecated Pass the limit into the
* {@link com.oracle.truffle.api.exception.AbstractTruffleException#AbstractTruffleException(String, Throwable, int, Node)
* AbstractTruffleException constructor}.
*/
@Deprecated
default int getStackTraceElementLimit() {
return -1;
}
/**
* Returns a location where this exception occurred in the AST. This method may return
* null to indicate that the location is not available.
*
* @return the {@link SourceSection} or null
* @since 0.33
* @deprecated Pass the location into the
* {@link com.oracle.truffle.api.exception.AbstractTruffleException#AbstractTruffleException(Node location)
* AbstractTruffleException constructor} or implement
* {@link com.oracle.truffle.api.interop.interop.InteropLibrary#hasSourceLocation(Object)}
* and
* {@link com.oracle.truffle.api.interop.interop.InteropLibrary#getSourceLocation(Object)}
* messages.
*/
@Deprecated
default SourceSection getSourceLocation() {
final Node node = getLocation();
return node == null ? null : node.getEncapsulatingSourceSection();
}
}