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/*
* Copyright (c) 2016, 2022, 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 com.oracle.truffle.api.instrumentation.NearestSectionFilter;
import java.net.URI;
import java.util.function.Predicate;
import com.oracle.truffle.api.instrumentation.SourceFilter;
import com.oracle.truffle.api.instrumentation.SourceSectionFilter;
import com.oracle.truffle.api.instrumentation.SourceSectionFilter.IndexRange;
import com.oracle.truffle.api.source.Source;
import com.oracle.truffle.api.source.SourceSection;
/**
* Description of a textual location in guest language source code where a {@link Breakpoint} can be
* installed.
*
* The location's key identifies a particular unit of source code, for example a
* {@link Source} or {@link URI}. It can be optionally specialized to a 1-based line number and if
* it is, then it may also be optionally specialized to a 1-based column number.
*
*
*/
abstract class BreakpointLocation {
protected final SourceElement[] sourceElements;
protected BreakpointLocation(SourceElement[] sourceElements) {
this.sourceElements = sourceElements;
}
/**
* A source location with {@code key == null} that always matches.
*/
static final BreakpointLocation ANY = new BreakpointSourceLocation();
static final URI ANY_SOURCE = URI.create("");
static BreakpointLocation create(Object key, SourceElement[] sourceElements, SourceSection sourceSection) {
return new BreakpointSourceLocation(key, sourceElements, sourceSection);
}
static BreakpointLocation create(Object key, SourceElement[] sourceElements, int line, int column) {
return new BreakpointSourceLocation(key, sourceElements, line, column);
}
static BreakpointLocation create(SourceElement[] sourceElements, SuspensionFilter filter) {
return new BreakpointFilteredLocation(sourceElements, filter);
}
final boolean containsRoot() {
if (sourceElements == null) {
return true;
}
for (SourceElement elem : sourceElements) {
if (SourceElement.ROOT == elem) {
return true;
}
}
return false;
}
abstract boolean isLoadBindingNeeded();
abstract LocationFilters createLocationFilters(SuspendAnchor suspendAnchor);
abstract SourceSectionFilter createExecLocationFilter(SourceSection location, SuspendAnchor suspendAnchor);
private static Class[] getTags(SourceElement[] sourceElements) {
Class[] elementTags = new Class[sourceElements.length];
for (int i = 0; i < elementTags.length; i++) {
elementTags[i] = sourceElements[i].getTag();
}
return elementTags;
}
private static void setTags(SourceSectionFilter.Builder f, SourceElement[] sourceElements) {
f.tagIs(getTags(sourceElements));
}
private static void setTags(NearestSectionFilter.Builder f, SourceElement[] sourceElements) {
f.tagIs(getTags(sourceElements));
}
private static final class BreakpointSourceLocation extends BreakpointLocation {
private final Object key;
private final SourceSection sourceSection;
private final int line;
private final int column;
/**
* @param key non-null source identifier
* @param line 1-based line number, -1 for unspecified
*/
BreakpointSourceLocation(Object key, SourceElement[] sourceElements, SourceSection sourceSection) {
super(sourceElements);
assert key instanceof Source || key instanceof URI;
this.key = key;
this.sourceSection = sourceSection;
this.line = -1;
this.column = -1;
}
/**
* @param key non-null source identifier
* @param line 1-based line number
* @param column 1-based column number, -1 for unspecified
*/
BreakpointSourceLocation(Object key, SourceElement[] sourceElements, int line, int column) {
super(sourceElements);
assert key instanceof Source || key instanceof URI;
assert line > 0 || line == -1;
assert column > 0 || column == -1;
this.key = key;
this.line = line;
this.column = column;
this.sourceSection = null;
}
private BreakpointSourceLocation() {
super(null);
this.key = null;
this.line = -1;
this.column = -1;
this.sourceSection = null;
}
private SourceFilter createSourceFilter() {
if (key == null) {
return null;
}
SourceFilter.Builder f = SourceFilter.newBuilder();
if (key instanceof URI) {
f.sourceIs(createSourcePredicate());
} else {
assert key instanceof Source;
Source s = (Source) key;
f.sourceIs(s);
}
return f.build();
}
private Predicate createSourcePredicate() {
if (key == null) {
return null;
}
if (key instanceof URI) {
if (key == ANY_SOURCE) {
return new Predicate<>() {
@Override
public boolean test(Source s) {
return true;
}
};
}
final URI sourceUri = (URI) key;
final String sourceRawPath = sourceUri.getRawPath() != null ? sourceUri.getRawPath() : sourceUri.getRawSchemeSpecificPart();
return new Predicate<>() {
@Override
public boolean test(Source s) {
URI uri = s.getURI();
if (uri.isAbsolute()) {
return sourceUri.equals(uri);
} else {
return sourceRawPath != null && sourceRawPath.endsWith(uri.getRawPath());
}
}
@Override
public String toString() {
return "URI equals " + sourceUri;
}
};
} else {
assert key instanceof Source;
Source source = (Source) key;
return new Predicate<>() {
@Override
public boolean test(Source s) {
return source.equals(s);
}
};
}
}
@Override
boolean isLoadBindingNeeded() {
return line != -1;
}
@Override
LocationFilters createLocationFilters(SuspendAnchor suspendAnchor) {
SourceSectionFilter.Builder f = SourceSectionFilter.newBuilder();
NearestSectionFilter nearestFilter = null;
if (key == null) {
f.tagIs(DebuggerTags.AlwaysHalt.class);
} else {
if (key != ANY_SOURCE) {
f.sourceFilter(createSourceFilter());
}
if (line != -1) {
assert sourceSection == null;
NearestSectionFilter.Builder nearestBuilder = NearestSectionFilter.newBuilder(line, column);
nearestBuilder.anchorStart(SuspendAnchor.BEFORE == suspendAnchor);
setTags(nearestBuilder, sourceElements);
nearestFilter = nearestBuilder.build();
} else {
if (sourceSection != null) {
f.sourceSectionEquals(sourceSection);
}
setTags(f, sourceElements);
}
}
return new LocationFilters(f.build(), nearestFilter);
}
@Override
SourceSectionFilter createExecLocationFilter(SourceSection location, SuspendAnchor suspendAnchor) {
SourceSectionFilter.Builder f = SourceSectionFilter.newBuilder();
if (key == null) {
return f.tagIs(DebuggerTags.AlwaysHalt.class).build();
}
if (column > 0) {
// we have precise column, we adhere to the location
f.sourceSectionEquals(location);
} else {
// We do not have specific column, we need to filter the whole line
switch (suspendAnchor) {
case BEFORE:
f.lineStartsIn(IndexRange.byLength(location.getStartLine(), 1));
break;
case AFTER:
f.lineEndsIn(IndexRange.byLength(location.getEndLine(), 1));
break;
default:
throw new IllegalArgumentException(suspendAnchor.name());
}
f.sourceIs(location.getSource());
}
setTags(f, sourceElements);
return f.build();
}
@Override
public String toString() {
String keyDescription;
if (key == null) {
keyDescription = "AlwaysHalt";
} else if (key instanceof Source) {
keyDescription = "sourceName=" + ((Source) key).getName();
} else if (key instanceof URI) {
keyDescription = "uri=" + ((URI) key).toString();
} else {
keyDescription = key.toString();
}
return keyDescription + ", line=" + line + ", column=" + column;
}
}
private static final class BreakpointFilteredLocation extends BreakpointLocation {
private final SuspensionFilter filter;
BreakpointFilteredLocation(SourceElement[] sourceElements, SuspensionFilter filter) {
super(sourceElements);
this.filter = filter;
}
@Override
boolean isLoadBindingNeeded() {
return false;
}
@Override
LocationFilters createLocationFilters(SuspendAnchor suspendAnchor) {
SourceSectionFilter.Builder f = SourceSectionFilter.newBuilder();
SourceFilter.Builder sourceFilterBuilder = SourceFilter.newBuilder();
if (filter != null) {
Predicate sourcePredicate = filter.getSourcePredicate();
if (sourcePredicate != null) {
sourceFilterBuilder.sourceIs(sourcePredicate);
}
sourceFilterBuilder.includeInternal(filter.isInternalIncluded());
}
SourceFilter sourceFilter = sourceFilterBuilder.build();
f.sourceFilter(sourceFilter);
setTags(f, sourceElements);
return new LocationFilters(f.build(), null);
}
@Override
SourceSectionFilter createExecLocationFilter(SourceSection location, SuspendAnchor suspendAnchor) {
return null;
}
}
static final class LocationFilters {
final SourceSectionFilter sectionFilter;
final NearestSectionFilter nearestFilter;
private LocationFilters(SourceSectionFilter sectionFilter, NearestSectionFilter nearestFilter) {
this.sectionFilter = sectionFilter;
this.nearestFilter = nearestFilter;
}
}
}
