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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.
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* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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package com.oracle.truffle.polyglot;
import org.graalvm.polyglot.Language;
import org.graalvm.polyglot.Source;
import org.graalvm.polyglot.SourceSection;
import org.graalvm.polyglot.impl.AbstractPolyglotImpl.AbstractStackFrameImpl;
import com.oracle.truffle.api.TruffleFile;
import com.oracle.truffle.api.TruffleStackTraceElement;
import com.oracle.truffle.api.nodes.LanguageInfo;
import com.oracle.truffle.api.nodes.Node;
import com.oracle.truffle.api.nodes.RootNode;
final class PolyglotExceptionFrame extends AbstractStackFrameImpl {
private final PolyglotLanguage language;
private final SourceSection sourceLocation;
private final String rootName;
private final boolean host;
private StackTraceElement stackTrace;
private final String formattedSource;
private PolyglotExceptionFrame(PolyglotExceptionImpl source, PolyglotLanguage language,
SourceSection sourceLocation, String rootName, boolean isHost, StackTraceElement stackTrace) {
super(source.polyglot);
this.language = language;
this.sourceLocation = sourceLocation;
this.rootName = rootName;
this.host = isHost;
this.stackTrace = stackTrace;
if (!isHostFrame()) {
this.formattedSource = formatSource(sourceLocation, source.getFileSystemContext(language));
} else {
this.formattedSource = null;
}
}
@Override
public org.graalvm.polyglot.SourceSection getSourceLocation() {
return this.sourceLocation;
}
@Override
public Language getLanguage() {
return this.language.api;
}
@Override
public String getRootName() {
return this.rootName;
}
@Override
public boolean isHostFrame() {
return this.host;
}
@Override
public StackTraceElement toHostFrame() {
if (stackTrace == null) {
String declaringClass = "<" + language.getId() + ">";
String methodName = rootName == null ? "" : rootName;
String fileName = sourceLocation != null ? sourceLocation.getSource().getName() : "Unknown";
int startLine = sourceLocation != null ? sourceLocation.getStartLine() : -1;
stackTrace = new StackTraceElement(declaringClass, methodName, fileName, startLine);
}
return stackTrace;
}
@Override
public String toStringImpl(int langColumn) {
StringBuilder b = new StringBuilder();
String languageId;
if (isHostFrame()) {
languageId = "";
} else {
languageId = language.getId();
b.append(spaces(Math.max(langColumn, languageId.length()) - languageId.length())).append("<").append(languageId).append("> ");
}
if (isHostFrame()) {
b.append(stackTrace.toString());
} else {
b.append(rootName);
b.append("(");
assert formattedSource != null;
b.append(formattedSource);
b.append(")");
}
return b.toString();
}
static PolyglotExceptionFrame createGuest(PolyglotExceptionImpl exception, TruffleStackTraceElement frame, boolean first) {
if (frame == null) {
return null;
}
RootNode targetRoot = frame.getTarget().getRootNode();
if (targetRoot.isInternal() && !exception.showInternalStackFrames) {
return null;
}
LanguageInfo info = targetRoot.getLanguageInfo();
if (info == null) {
return null;
}
PolyglotEngineImpl engine = exception.engine;
PolyglotLanguage language = null;
SourceSection location = null;
String rootName = targetRoot.getName();
if (engine != null) {
language = engine.idToLanguage.get(info.getId());
Node callNode = frame.getLocation();
if (callNode != null) {
com.oracle.truffle.api.source.SourceSection section = callNode.getEncapsulatingSourceSection();
if (section != null) {
Source source = engine.getAPIAccess().newSource(section.getSource());
location = engine.getAPIAccess().newSourceSection(source, section);
} else {
location = null;
}
} else {
location = first ? exception.getSourceLocation() : null;
}
}
return new PolyglotExceptionFrame(exception, language, location, rootName, false, null);
}
static PolyglotExceptionFrame createHost(PolyglotExceptionImpl exception, StackTraceElement hostStack) {
PolyglotLanguage language = exception.engine != null ? exception.engine.hostLanguage : null;
// source section for the host language is currently null
// we should potentially in the future create a source section for the host language
// however it was not clear how a host language source section would consist of.
SourceSection location = null;
String rootname = hostStack.getClassName() + "." + hostStack.getMethodName();
return new PolyglotExceptionFrame(exception, language, location, rootname, true, hostStack);
}
private static String spaces(int length) {
StringBuilder b = new StringBuilder();
for (int i = 0; i < length; i++) {
b.append(' ');
}
return b.toString();
}
private static String formatSource(SourceSection sourceSection, Object fileSystemContext) {
if (sourceSection == null) {
return "Unknown";
}
Source source = sourceSection.getSource();
if (source == null) {
// safety check. likely not necsssary
return "Unknown";
}
StringBuilder b = new StringBuilder();
String path = source.getPath();
if (path == null) {
b.append(source.getName());
} else {
if (fileSystemContext != null) {
try {
TruffleFile pathAbsolute = EngineAccessor.LANGUAGE.getTruffleFile(path, fileSystemContext);
TruffleFile pathBase = EngineAccessor.LANGUAGE.getTruffleFile("", fileSystemContext).getAbsoluteFile();
TruffleFile pathRelative = pathBase.relativize(pathAbsolute);
b.append(pathRelative.getPath());
} catch (IllegalArgumentException | UnsupportedOperationException | SecurityException e) {
b.append(path);
}
} else {
b.append(path);
}
}
b.append(":").append(formatIndices(sourceSection, true));
return b.toString();
}
private static String formatIndices(SourceSection sourceSection, boolean needsColumnSpecifier) {
StringBuilder b = new StringBuilder();
boolean singleLine = sourceSection.getStartLine() == sourceSection.getEndLine();
if (singleLine) {
b.append(sourceSection.getStartLine());
} else {
b.append(sourceSection.getStartLine()).append("-").append(sourceSection.getEndLine());
}
if (needsColumnSpecifier) {
b.append(":");
if (sourceSection.getCharLength() <= 1) {
b.append(sourceSection.getCharIndex());
} else {
b.append(sourceSection.getCharIndex()).append("-").append(sourceSection.getCharIndex() + sourceSection.getCharLength() - 1);
}
}
return b.toString();
}
}