This commit is contained in:
Claudio Maggioni 2023-11-16 00:13:33 +01:00
parent d2d364bc71
commit 8395b10029
3 changed files with 132 additions and 8 deletions

View file

@ -1,4 +1,3 @@
<?xml version="1.0" encoding="UTF-8"?>
<project version="4">
<component name="ASMPluginConfiguration">
<asm skipDebug="false" skipFrames="false" skipCode="false" expandFrames="false" />

View file

@ -1,8 +1,14 @@
package ch.usi.inf.sp.callgraph;
import org.objectweb.asm.Opcodes;
import java.io.FileWriter;
import java.io.IOException;
import java.io.PrintWriter;
import java.util.ArrayList;
import java.util.HashMap;
import java.util.Map;
import java.util.stream.Collectors;
/**
@ -13,28 +19,134 @@ import java.io.PrintWriter;
*/
public final class CallGraphRenderer {
private static String nodeName(ClassType type) {
return type.getInternalName().replaceAll("/", "_");
private final Map<String, Integer> identifiers = new HashMap<>();
private final Map<Integer, Boolean> nodeBuilt = new HashMap<>();
private String identifier(String what, boolean fromNode) {
return "node" + identifiers.computeIfAbsent(what, (k) -> {
int key = identifiers.size() + 1;
nodeBuilt.compute(key, (ke, v) -> v == null ? fromNode : (v || fromNode));
return key;
});
}
private static String nodeLabel(ClassType type) {
final String name = type.getInternalName().replaceAll("/", ".");
return name.substring(1, name.length() - 1);
private String classNodeName(ClassType type) {
return identifier(type.getInternalName(), true);
}
private static String methodDescription(Method e) {
return (e.getVerboseModifiers() + " " +
e.getName().replaceAll("<", "&lt;").replaceAll(">", "&gt;") +
e.getDescriptor()).trim();
}
private static String classNodeDescriptor(ClassType type) {
final String className = type.getInternalName();
if (!type.isResolved()) {
return "[shape=ellipse,style=dashed,label=\"" + className + "\"]";
}
final String methods = type.getMethods().stream()
.map(CallGraphRenderer::methodDescription)
.collect(Collectors.joining("\\n"));
final String style = type.isAbstract() ? "dashed" : "solid";
return "[shape=record,style=" + style + ",label=\"{" + className + "|" + methods + "}\"]";
}
private String methodNodeName(ClassHierarchy hierarchy, String className, String name, String descriptor, boolean fromNode) {
try {
if (!hierarchy.getOrCreateClass(className).isResolved()) {
return identifier(className, true);
}
} catch (TypeInconsistencyException e) {
throw new RuntimeException(e);
}
return identifier(className + " " + name + " " + descriptor, fromNode);
}
private static String methodNodeDescriptor(Method method) {
return "[shape=rectangle,style=filled,fillcolor=lightgreen,label=\"" + method.getDeclaringClassName() +
"\\n" + methodDescription(method) + "\"]";
}
private static String getEdge(String from, String to, int opCode, String color) {
String style;
switch (opCode) {
case Opcodes.INVOKEVIRTUAL: style = "dashed"; break;
case Opcodes.INVOKEINTERFACE: style = "dotted"; break;
default: style = "solid";
}
return from + " -> " + to + " [style=" + style + ",color=" + color + "]";
}
public void dumpDot(final ClassHierarchy hierarchy, final String fileName) throws IOException {
final PrintWriter pw = new PrintWriter(new FileWriter(fileName));
pw.println("digraph CallGraph {");
pw.println(" rankdir=\"BT\"");
final ArrayList<String> edges = new ArrayList<>();
for (final Type type : hierarchy.getTypes()) {
if (type instanceof ClassType) {
final ClassType classType = (ClassType) type;
final ClassType superClassType = classType.getSuperClass();
pw.println(nodeName(classType) + " [shape=record,label=\"" + nodeLabel(classType) + "\"];");
pw.println(classNodeName(classType) + " " + classNodeDescriptor(classType) + ";");
// TODO: implement this
if (superClassType != null) {
edges.add(getEdge(classNodeName(classType), classNodeName(superClassType), 0, "black"));
}
for (final ClassType c : classType.getInterfaces()) {
edges.add(getEdge(classNodeName(classType), classNodeName(c), Opcodes.INVOKEVIRTUAL, "black"));
}
for (final Method m : classType.getMethods()) {
final String mName = methodNodeName(hierarchy, m.getDeclaringClassName(), m.getName(), m.getDescriptor(), true);
pw.println(mName + " " + methodNodeDescriptor(m) + ";");
edges.add(getEdge(classNodeName(classType), mName, 0, "lightgreen"));
for (final CallSite c : m.getCallSites()) {
final String cName = methodNodeName(hierarchy,
c.getDeclaredTargetClassName(),
c.getTargetMethodName(),
c.getTargetMethodDescriptor(), false);
edges.add(getEdge(mName, cName, c.getOpcode(), "blue"));
for (final ClassType p : c.getPossibleTargetClasses()) {
final String pName = methodNodeName(hierarchy,
p.getInternalName(),
c.getTargetMethodName(),
c.getTargetMethodDescriptor(), false);
edges.add(getEdge(mName, pName, c.getOpcode(), "red"));
}
}
}
}
}
// Add missing node declarations (happens with methods in classes not scanned)
final Map<Integer, String> reverseIdentifiers = identifiers.entrySet().stream()
.collect(Collectors.toMap(Map.Entry::getValue, Map.Entry::getKey));
for (Map.Entry<Integer, Boolean> e : nodeBuilt.entrySet()) {
if (!e.getValue()) {
pw.println("node" + e.getKey() + " [label=\"" + reverseIdentifiers.get(e.getKey()) + "\"]");
}
}
pw.append('\n');
for (final String edge : edges) {
pw.println(edge);
}
pw.println("}");
pw.close();
}

View file

@ -2,6 +2,9 @@ package ch.usi.inf.sp.callgraph;
import java.util.ArrayList;
import java.util.Collection;
import java.util.Objects;
import java.util.stream.Collectors;
import java.util.stream.Stream;
import org.objectweb.asm.Opcodes;
@ -83,6 +86,16 @@ public final class Method {
public boolean isFinal() {
return (Opcodes.ACC_FINAL & modifiers) !=0;
}
public String getVerboseModifiers() {
final String visibility = isPublic() ? "public" :
isProtected() ? "protected" :
isPrivate() ? "private" : null;
final String kind = isStatic() ? "static" : isAbstract() ? "abstract" : null;
return Stream.of(visibility, kind).filter(Objects::nonNull).collect(Collectors.joining(" "));
}
/**
* Add a CallSite to this method.