CFG createCFG(String className) throws ClassNotFoundException {
CFG cfg = new CFG();
JavaClass jc = Repository.lookupClass(className);
ClassGen cg = new ClassGen(jc);
ConstantPoolGen cpg = cg.getConstantPool();
for (Method m : cg.getMethods()) {
MethodGen mg = new MethodGen(m, cg.getClassName(), cpg);
InstructionList il = mg.getInstructionList();
InstructionHandle[] handles = il.getInstructionHandles();
int prev = 0;
for (InstructionHandle ih : handles) {
int position = ih.getPosition();
cfg.addNode(position, m, jc);
Instruction inst = ih.getInstruction();
boolean br = inst.getName().contains("if") || inst.getName().contains("goto");
boolean ret = inst.getName().contains("return");
boolean stat = inst.getName().contains("invokestatic");
int len = inst.getLength();
if (stat) {
int index = inst.toString(true).indexOf(" ");
String name = inst.toString(true).substring(index + 1);
int tar = Integer.valueOf(name);
INVOKESTATIC inv = new INVOKESTATIC(tar);
name = inv.getMethodName(cpg);
Method m2 = null;
Method[] tm = cg.getMethods();
for (int i = 0; i < tm.length; i++) {
if (tm[i].getName().equals(name)) {
m2 = tm[i];
}
}
cfg.addEdge(position, m, jc, 0, m2, jc);
cfg.addEdge(-1, m2, jc, position + len, m, jc);
}
if (!ret && !stat) {
cfg.addEdge(position, position + len, m, jc);
}
if (br) {
cfg.addEdge(position, position + len, m, jc);
IF_ICMPGE comp = new IF_ICMPGE(ih);
String name = comp.getTarget().toString(false);
int index = name.indexOf(">");
name = name.substring(index + 2);
int tar = Integer.valueOf(name);
cfg.addEdge(position, tar, m, jc);
}
if (ret) {
cfg.addEdge(position, -1, m, jc);
}
prev = position;
}
System.out.println(cfg.toString());
}
return cfg;
}
public static void main(String args[]) throws IOException {
List<Instruction> insns = Instructions.getInstructions();
Collections.sort(insns);
List<Character> startLetters = new java.util.ArrayList<Character>();
char last = 0;
for (int i = 0; i < insns.size(); i++) {
Instruction insn = (Instruction) insns.get(i);
char leadChar = insn.getName().charAt(0);
if (last != leadChar) {
startLetters.add(leadChar);
last = leadChar;
}
}
File docdir = new File("SquawkBytecodeSpec");
Build.mkdir(docdir);
PrintWriter out = null;
out = new PrintWriter(new FileWriter(new File(docdir, "Instructions.doc.html")));
out.println("<!DOCTYPE HTML PUBLIC \"-//W3C//DTD HTML 3.2//EN\">");
out.println("<html>");
out.println("<head>");
out.println("<title>Squawk Bytecode Instruction Set</title>");
out.println("</head>");
out.println("<body BGCOLOR=#eeeeff text=#000000 LINK=#0000ff VLINK=#000077 ALINK=#ff0000>");
out.println("<table width=100%><tr>");
out.print(
"<td>Prev | <a href=\"Instructions2.doc1.html\">Next</a> | <a href=\"Instructions2.index.html\">Index</a> </td>");
out.println("<td align=right><i><i>Squawk Bytecode Instruction Set</i></i></td>");
out.println("</tr></table>");
out.println();
out.println("<hr><br>");
out.println();
for (int i = 0; i < startLetters.size(); i++) {
Character c = (Character) startLetters.get(i);
out.println(
"<a href=\"Instructions2.doc"
+ (i + 1)
+ ".html\">"
+ Character.toUpperCase(c.charValue())
+ "</a>");
}
out.println();
out.println("<hr><br>");
out.println();
out.println("<h1>Squawk Bytecode Instruction Set</h1>");
out.println("<hr><p>");
out.println("A Squawk bytecode instruction consists of an opcode specifying the operation");
out.println(
"to be performed, followed by zero or more operands embodying values to be operated");
out.println("upon. This chapter gives details about the format of each Squawk bytecode");
out.println("instruction and the operation it performs.</p>");
out.println("<hr>");
out.println("<p>Prev | <a href=\"Instructions2.doc1.html\">Next</a></p>");
out.println("</body></html>");
out.close();
PrintWriter indexPage =
new PrintWriter(new FileWriter(new File(docdir, "Instructions2.index.html")));
indexPage.println("<!DOCTYPE HTML PUBLIC \"-//W3C//DTD HTML 3.2//EN\">");
indexPage.println("<html>");
indexPage.println("<head>");
indexPage.println("<title>Squawk Bytecode Instruction Set</title>");
indexPage.println("</head>");
indexPage.println(
"<body BGCOLOR=#eeeeff text=#000000 LINK=#0000ff VLINK=#000077 ALINK=#ff0000>");
indexPage.println("<table width=100%><tr>");
indexPage.println("<td><a href=\"Instructions.doc.html\">Contents</a></td>");
indexPage.println("<td align=right><i><i>Squawk Bytecode Instruction Set</i></i></td>");
indexPage.println("</tr></table>");
indexPage.println();
indexPage.println("<hr><br>");
indexPage.println();
Iterator<Instruction> iter = insns.iterator();
Instruction insn = (iter.hasNext()) ? iter.next() : null;
for (int i = 0; i < startLetters.size(); i++) {
String thisPage = "Instructions2.doc" + (i + 1) + ".html";
String prevPage = "Instructions2.doc" + i + ".html";
String nextPage = "Instructions2.doc" + (i + 2) + ".html";
out = new PrintWriter(new FileWriter(new File(docdir, thisPage)));
out.println("<!DOCTYPE HTML PUBLIC \"-//W3C//DTD HTML 3.2//EN\">");
out.println("<html>");
out.println("<head>");
out.println("<title>Squawk Bytecode Instruction Descriptions</title>");
out.println("</head>");
out.println("<body BGCOLOR=#eeeeff text=#000000 LINK=#0000ff VLINK=#000077 ALINK=#ff0000>");
out.println("<table width=100%><tr>");
out.print("<td>");
out.print(" <a href=\"Instructions.doc.html\">Contents</a> | ");
if (i > 0) out.print("<a href=\"" + prevPage + "\">Prev</a>");
else out.print("<a href=\"Instructions.doc.html\">Prev</a>");
out.print(" | ");
if (i < startLetters.size() - 1) out.print("<a href=\"" + nextPage + "\">Next</a>");
else out.print("Next");
out.println(" | <a href=\"Instructions2.index.html\">Index</a> </td>");
out.println("<td align=right><i><i>Squawk Bytecode Instruction Set</i></i></td>");
out.println("</tr></table>");
out.println();
out.println("<hr><br>");
out.println();
for (int j = 0; j < startLetters.size(); j++) {
Character c = (Character) startLetters.get(j);
out.println(
"<a href=\"Instructions2.doc"
+ (j + 1)
+ ".html\">"
+ Character.toUpperCase(c.charValue())
+ "</a>");
}
out.println();
while (insn != null
&& Character.toUpperCase(insn.getName().charAt(0))
== Character.toUpperCase(((Character) startLetters.get(i)).charValue())) {
String name = insn.getName();
indexPage.println("<a href=\"" + thisPage + "#" + name + "\">" + name + "</a><br>");
out.println("<hr><a name=\"" + name + "\"><h2>" + name + "</h2>");
out.println("<p><b>Operation</b></p>");
out.println("<blockquote>");
insn.printOperation(out);
out.println("</blockquote>");
out.println("<p><b>Format</b></p>");
out.println("<blockquote>");
insn.printFormat(out);
out.println("</blockquote>");
out.println("<p><b>Forms</b></p>");
out.println("<blockquote>");
insn.printForms(out);
out.println("</blockquote>");
out.println("<p><b>Operand Stack</b></p>");
out.println("<blockquote>");
insn.printOperandStack(out);
out.println("</blockquote>");
out.println("<p><b>Description</b></p>");
out.println("<blockquote>");
insn.printDescription(out);
out.println("</blockquote>");
if (insn.hasNotes()) {
out.println("<p><b>Notes</b></p>");
out.println("<blockquote>");
insn.printNotes(out);
out.println("</blockquote>");
}
insn = (iter.hasNext()) ? (Instruction) iter.next() : null;
}
out.println("<hr>");
if (i > 0) out.print("<a href=\"Instructions2.doc" + i + ".html\">Prev</a>");
else out.print("<a href=\"Instructions.doc.html\">Prev</a>");
out.print(" | ");
if (i < startLetters.size() - 1)
out.print("<a href=\"Instructions2.doc" + (i + 2) + ".html\">Next</a>");
else out.print("Next");
out.println();
out.println("</body></html>");
out.flush();
out.close();
}
indexPage.println("</body></html>");
indexPage.close();
for (int i = 0; i < 256; i++)
if (!opcodes.contains(new Integer(i))) System.out.println("missing opcode: " + i);
}
