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Truffle is a multi-language framework for executing dynamic languages
that achieves high performance when combined with Graal.
/*
* Copyright (c) 2018, 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
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* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
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* SOFTWARE.
*/
package com.oracle.truffle.api.debug;
import java.io.PrintStream;
import com.oracle.truffle.api.instrumentation.EventBinding;
import com.oracle.truffle.api.instrumentation.EventContext;
import com.oracle.truffle.api.instrumentation.InstrumentableNode;
import com.oracle.truffle.api.instrumentation.Tag;
import com.oracle.truffle.api.instrumentation.TruffleInstrument;
import com.oracle.truffle.api.nodes.Node;
import com.oracle.truffle.api.nodes.RootNode;
import com.oracle.truffle.api.source.SourceSection;
/**
* Debugger abstraction of EventContext.
*/
interface SuspendedContext {
static SuspendedContext create(EventContext eventContext, TruffleInstrument.Env env) {
return new SuspendedEventContext(eventContext, env);
}
static SuspendedContext create(Node node, ThreadDeath unwind) {
return new CallerEventContext(node, unwind);
}
/**
* Stack depth of this context.
*/
int getStackDepth();
SourceSection getInstrumentedSourceSection();
Node getInstrumentedNode();
boolean hasTag(Class tag);
boolean isLanguageContextInitialized();
ThreadDeath createUnwind(Object info, EventBinding unwindBinding);
final class SuspendedEventContext implements SuspendedContext {
private final EventContext eventContext;
private final TruffleInstrument.Env env;
private SuspendedEventContext(EventContext eventContext, TruffleInstrument.Env env) {
this.eventContext = eventContext;
this.env = env;
}
@Override
public int getStackDepth() {
return 0;
}
public SourceSection getInstrumentedSourceSection() {
SourceSection ss = eventContext.getInstrumentedSourceSection();
if (ss == null) {
Node node = eventContext.getInstrumentedNode();
// Nodes tagged with standard tags should have a source section attached.
PrintStream err = new PrintStream(env.err());
err.print("WARNING: Instrumented node " + node + " of class " + node.getClass() + " has null SourceSection.");
ss = DebugSourcesResolver.findEncapsulatedSourceSection(node);
if (ss == null) {
RootNode root = node.getRootNode();
err.print("WARNING: and null encapsulating SourceSection under " + root + " of class = " + root.getClass());
}
err.flush();
}
return ss;
}
public Node getInstrumentedNode() {
return eventContext.getInstrumentedNode();
}
@Override
public boolean hasTag(Class tag) {
return eventContext.hasTag(tag);
}
public boolean isLanguageContextInitialized() {
return eventContext.isLanguageContextInitialized();
}
public ThreadDeath createUnwind(Object info, EventBinding unwindBinding) {
return eventContext.createUnwind(info, unwindBinding);
}
@Override
public String toString() {
return eventContext.toString();
}
}
final class CallerEventContext implements SuspendedContext {
private final Node node;
private final ThreadDeath unwind;
private CallerEventContext(Node node, ThreadDeath unwind) {
this.node = node;
this.unwind = unwind;
}
@Override
public int getStackDepth() {
return 1;
}
@Override
public SourceSection getInstrumentedSourceSection() {
if (node == null) {
return null;
} else {
return DebugSourcesResolver.findEncapsulatedSourceSection(node);
}
}
@Override
public Node getInstrumentedNode() {
return node;
}
@Override
public boolean hasTag(Class tag) {
return ((node instanceof InstrumentableNode) && ((InstrumentableNode) node).hasTag(tag));
}
@Override
public boolean isLanguageContextInitialized() {
return true;
}
@Override
public ThreadDeath createUnwind(Object info, EventBinding unwindBinding) {
return unwind;
}
@Override
public String toString() {
return "CallerContext[source=" + getInstrumentedSourceSection() + "]";
}
}
}