private void compile(Clazz clazz, OutputStream out) throws IOException {
sootClass = clazz.getSootClass();
mb = new ModuleBuilder();
trampolines = new HashSet<Trampoline>();
catches = new HashSet<String>();
classFields = getClassFields(sootClass);
instanceFields = getInstanceFields(sootClass);
classType = getClassType(sootClass);
instanceType = getInstanceType(sootClass);
attributesEncoder.encode(mb, sootClass);
// Add a <clinit> method if the class has ConstantValueTags but no <clinit>.
// This has to be done before createInfoStruct() is called otherwise the
// ClassInfoHeader->initializer value will become NULL and constant static fields
// will never be initialized.
if (!sootClass.declaresMethodByName("<clinit>") && hasConstantValueTags(classFields)) {
SootMethod clinit =
new SootMethod("<clinit>", Collections.EMPTY_LIST, VoidType.v(), Modifier.STATIC);
JimpleBody body = Jimple.v().newBody(clinit);
clinit.setActiveBody(body);
body.getUnits().add(new JReturnVoidStmt());
this.sootClass.addMethod(clinit);
}
if (isStruct(sootClass)) {
if (!Modifier.isFinal(sootClass.getModifiers())) {
throw new IllegalArgumentException("Struct class must be final");
}
SootMethod _sizeOf =
new SootMethod("_sizeOf", Collections.EMPTY_LIST, IntType.v(), Modifier.PROTECTED);
sootClass.addMethod(_sizeOf);
SootMethod sizeOf =
new SootMethod(
"sizeOf", Collections.EMPTY_LIST, IntType.v(), Modifier.PUBLIC | Modifier.STATIC);
sootClass.addMethod(sizeOf);
}
mb.addInclude(
getClass()
.getClassLoader()
.getResource(
String.format("header-%s-%s.ll", config.getOs().getFamily(), config.getArch())));
mb.addInclude(getClass().getClassLoader().getResource("header.ll"));
mb.addFunction(createInstanceof());
mb.addFunction(createCheckcast());
mb.addFunction(createLdcClass());
mb.addFunction(createLdcClassWrapper());
Function allocator = createAllocator();
mb.addFunction(allocator);
mb.addFunction(createClassInitWrapperFunction(allocator.ref()));
for (SootField f : sootClass.getFields()) {
Function getter = createFieldGetter(f);
Function setter = createFieldSetter(f);
mb.addFunction(getter);
mb.addFunction(setter);
if (f.isStatic() && !f.isPrivate()) {
mb.addFunction(createClassInitWrapperFunction(getter.ref()));
if (!f.isFinal()) {
mb.addFunction(createClassInitWrapperFunction(setter.ref()));
}
}
}
for (SootMethod method : sootClass.getMethods()) {
String name = method.getName();
if (isBridge(method)) {
bridgeMethod(method);
} else if (isStruct(sootClass)
&& ("_sizeOf".equals(name) || "sizeOf".equals(name) || isStructMember(method))) {
structMember(method);
} else if (method.isNative()) {
nativeMethod(method);
} else if (!method.isAbstract()) {
method(method);
}
if (!name.equals("<clinit>")
&& !name.equals("<init>")
&& !method.isPrivate()
&& !method.isStatic()
&& !Modifier.isFinal(method.getModifiers())
&& !Modifier.isFinal(sootClass.getModifiers())) {
createLookupFunction(method);
}
if (method.isStatic()) {
String fnName = mangleMethod(method);
if (method.isSynchronized()) {
fnName += "_synchronized";
}
FunctionRef fn = new FunctionRef(fnName, getFunctionType(method));
mb.addFunction(createClassInitWrapperFunction(fn));
}
}
Set<String> trampolineDependencies = new HashSet<String>();
for (Trampoline trampoline : trampolines) {
trampolineResolver.compile(mb, trampoline);
trampolineDependencies.addAll(trampolineResolver.getDependencies());
}
Global classInfoStruct = null;
StructureConstant classInfoErrorStruct = createClassInfoErrorStruct();
if (classInfoErrorStruct != null) {
// The class cannot be loaded at runtime. Replace the ClassInfo struct
// with a ClassInfoError struct with details of why.
classInfoStruct = new Global(mangleClass(sootClass) + "_info_struct", classInfoErrorStruct);
} else {
classInfoStruct =
new Global(mangleClass(sootClass) + "_info_struct", createClassInfoStruct());
}
mb.addGlobal(classInfoStruct);
Function infoFn = FunctionBuilder.infoStruct(sootClass);
infoFn.add(new Ret(new ConstantBitcast(classInfoStruct.ref(), I8_PTR_PTR)));
mb.addFunction(infoFn);
out.write(mb.build().toString().getBytes("UTF-8"));
clazz.clearDependencies();
clazz.addDependency(
"java/lang/Object"); // Make sure no class or interface has zero dependencies
if (sootClass.hasSuperclass() && !sootClass.isInterface()) {
clazz.addDependency(getInternalName(sootClass.getSuperclass()));
}
for (SootClass iface : sootClass.getInterfaces()) {
clazz.addDependency(getInternalName(iface));
}
for (SootField f : sootClass.getFields()) {
addDependencyIfNeeded(clazz, f.getType());
}
for (SootMethod m : sootClass.getMethods()) {
addDependencyIfNeeded(clazz, m.getReturnType());
@SuppressWarnings("unchecked")
List<soot.Type> paramTypes = (List<soot.Type>) m.getParameterTypes();
for (soot.Type type : paramTypes) {
addDependencyIfNeeded(clazz, type);
}
}
clazz.addDependencies(attributesEncoder.getDependencies());
clazz.addDependencies(trampolineDependencies);
clazz.addDependencies(catches);
for (Trampoline t : trampolines) {
if (!(t instanceof LdcString)) {
String desc = t.getTarget();
if (desc.charAt(0) == 'L' || desc.charAt(0) == '[') {
// Target is a descriptor
addDependencyIfNeeded(clazz, desc);
} else {
clazz.addDependency(t.getTarget());
}
}
if (t instanceof FieldAccessor) {
addDependencyIfNeeded(clazz, ((FieldAccessor) t).getFieldDesc());
} else if (t instanceof Invoke) {
String methodDesc = ((Invoke) t).getMethodDesc();
addDependencyIfNeeded(clazz, getReturnTypeDescriptor(methodDesc));
for (String desc : getParameterDescriptors(methodDesc)) {
addDependencyIfNeeded(clazz, desc);
}
}
}
clazz.saveDependencies();
}
private void patchAsmWithFunctionSizes(Clazz clazz, File sFile) throws IOException {
Set<String> functionNames = new HashSet<String>();
for (SootMethod method : clazz.getSootClass().getMethods()) {
if (!method.isAbstract()) {
String name = mangleMethod(method);
if (config.getOs().getFamily() == OS.Family.darwin) {
name = "_" + name;
}
functionNames.add(name);
}
}
String localLabelPrefix = ".L";
String prefix = mangleClass(clazz.getInternalName());
if (config.getOs().getFamily() == OS.Family.darwin) {
localLabelPrefix = "L";
prefix = "_" + prefix;
}
String infoStructLabel = prefix + "_info_struct";
Pattern methodImplPattern =
Pattern.compile("\\s*\\.(?:quad|long)\\s+(" + Pattern.quote(prefix) + "[^\\s]+).*");
File outFile = new File(sFile.getParentFile(), sFile.getName() + ".tmp");
BufferedReader in = null;
BufferedWriter out = null;
try {
in = new BufferedReader(new InputStreamReader(new FileInputStream(sFile), "UTF-8"));
out = new BufferedWriter(new OutputStreamWriter(new FileOutputStream(outFile), "UTF-8"));
String line = null;
String currentFunction = null;
while ((line = in.readLine()) != null) {
if (currentFunction == null) {
out.write(line);
out.write('\n');
if (line.startsWith(prefix)) {
int colon = line.indexOf(':');
if (colon == -1) {
continue;
}
String label = line.substring(0, colon);
if (functionNames.contains(label)) {
currentFunction = label;
} else if (label.equals(infoStructLabel)) {
break;
}
}
} else if (line.trim().equals(".cfi_endproc")
|| line.trim().startsWith(".section")
|| line.trim().startsWith(".globl")) {
out.write(localLabelPrefix);
out.write(currentFunction);
out.write("_end:\n\n");
currentFunction = null;
out.write(line);
out.write('\n');
} else {
out.write(line);
out.write('\n');
}
}
while ((line = in.readLine()) != null) {
out.write(line);
out.write('\n');
if (line.contains(prefix)) {
Matcher matcher = methodImplPattern.matcher(line);
if (matcher.matches()) {
String functionName = matcher.group(1);
if (functionNames.contains(functionName)) {
line = in.readLine();
if (line.contains(String.valueOf(DUMMY_METHOD_SIZE))) {
out.write("\t.long\t");
out.write(localLabelPrefix + functionName + "_end - " + functionName);
out.write('\n');
} else {
out.write(line);
out.write('\n');
}
}
}
}
}
} finally {
IOUtils.closeQuietly(in);
IOUtils.closeQuietly(out);
}
sFile.renameTo(new File(sFile.getParentFile(), sFile.getName() + ".orig"));
outFile.renameTo(sFile);
}
