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/*
* Copyright (C) 2012 Trillian Mobile AB
*
* This program is free software; you can redistribute it and/or
* modify it under the terms of the GNU General Public License
* as published by the Free Software Foundation; either version 2
* of the License, or (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program. If not, see .
*/
package org.robovm.compiler;
import static org.robovm.compiler.Annotations.*;
import static org.robovm.compiler.Functions.*;
import static org.robovm.compiler.Types.*;
import static org.robovm.compiler.llvm.Type.*;
import java.io.BufferedOutputStream;
import java.io.BufferedReader;
import java.io.BufferedWriter;
import java.io.ByteArrayInputStream;
import java.io.ByteArrayOutputStream;
import java.io.File;
import java.io.FileOutputStream;
import java.io.IOException;
import java.io.InputStream;
import java.io.InputStreamReader;
import java.io.OutputStream;
import java.io.OutputStreamWriter;
import java.util.ArrayList;
import java.util.Collections;
import java.util.Comparator;
import java.util.HashSet;
import java.util.List;
import java.util.Set;
import java.util.concurrent.Executor;
import java.util.concurrent.ExecutorService;
import java.util.concurrent.RejectedExecutionException;
import java.util.regex.Matcher;
import java.util.regex.Pattern;
import org.apache.commons.io.FileUtils;
import org.apache.commons.io.IOUtils;
import org.robovm.compiler.clazz.Clazz;
import org.robovm.compiler.clazz.ClazzInfo;
import org.robovm.compiler.clazz.Dependency;
import org.robovm.compiler.config.Arch;
import org.robovm.compiler.config.Config;
import org.robovm.compiler.config.OS;
import org.robovm.compiler.llvm.AliasRef;
import org.robovm.compiler.llvm.And;
import org.robovm.compiler.llvm.ArrayConstantBuilder;
import org.robovm.compiler.llvm.Bitcast;
import org.robovm.compiler.llvm.Br;
import org.robovm.compiler.llvm.Constant;
import org.robovm.compiler.llvm.ConstantBitcast;
import org.robovm.compiler.llvm.Fence;
import org.robovm.compiler.llvm.Function;
import org.robovm.compiler.llvm.FunctionDeclaration;
import org.robovm.compiler.llvm.FunctionRef;
import org.robovm.compiler.llvm.Getelementptr;
import org.robovm.compiler.llvm.Global;
import org.robovm.compiler.llvm.GlobalRef;
import org.robovm.compiler.llvm.Icmp;
import org.robovm.compiler.llvm.IntegerConstant;
import org.robovm.compiler.llvm.Label;
import org.robovm.compiler.llvm.Linkage;
import org.robovm.compiler.llvm.Load;
import org.robovm.compiler.llvm.NullConstant;
import org.robovm.compiler.llvm.Ordering;
import org.robovm.compiler.llvm.PackedStructureConstantBuilder;
import org.robovm.compiler.llvm.PointerType;
import org.robovm.compiler.llvm.Ret;
import org.robovm.compiler.llvm.Store;
import org.robovm.compiler.llvm.StructureConstant;
import org.robovm.compiler.llvm.StructureConstantBuilder;
import org.robovm.compiler.llvm.StructureType;
import org.robovm.compiler.llvm.Value;
import org.robovm.compiler.llvm.Variable;
import org.robovm.compiler.llvm.VariableRef;
import org.robovm.compiler.plugin.CompilerPlugin;
import org.robovm.compiler.trampoline.FieldAccessor;
import org.robovm.compiler.trampoline.Invoke;
import org.robovm.compiler.trampoline.Trampoline;
import org.robovm.llvm.Context;
import org.robovm.llvm.LineInfo;
import org.robovm.llvm.Module;
import org.robovm.llvm.ObjectFile;
import org.robovm.llvm.PassManager;
import org.robovm.llvm.PassManagerBuilder;
import org.robovm.llvm.Symbol;
import org.robovm.llvm.Target;
import org.robovm.llvm.TargetMachine;
import org.robovm.llvm.binding.Attribute;
import org.robovm.llvm.binding.CodeGenFileType;
import org.robovm.llvm.binding.CodeGenOptLevel;
import soot.BooleanType;
import soot.ByteType;
import soot.CharType;
import soot.DoubleType;
import soot.FloatType;
import soot.IntType;
import soot.LongType;
import soot.Modifier;
import soot.PrimType;
import soot.RefLikeType;
import soot.ShortType;
import soot.SootClass;
import soot.SootField;
import soot.SootMethod;
import soot.VoidType;
import soot.jimple.Jimple;
import soot.jimple.JimpleBody;
import soot.jimple.internal.JReturnVoidStmt;
import soot.tagkit.ConstantValueTag;
import soot.tagkit.Tag;
/**
*
* @version $Id$
*/
public class ClassCompiler {
private static final int DUMMY_METHOD_SIZE = 0x01abcdef;
public static final int CI_PUBLIC = 0x1;
public static final int CI_FINAL = 0x2;
public static final int CI_INTERFACE = 0x4;
public static final int CI_ABSTRACT = 0x8;
public static final int CI_SYNTHETIC = 0x10;
public static final int CI_ANNOTATION = 0x20;
public static final int CI_ENUM = 0x40;
public static final int CI_ATTRIBUTES = 0x80;
public static final int CI_ERROR = 0x100;
public static final int CI_INITIALIZED = 0x200;
public static final int CI_FINALIZABLE = 0x400;
public static final int CI_ERROR_TYPE_NONE = 0x0;
public static final int CI_ERROR_TYPE_NO_CLASS_DEF_FOUND = 0x1;
public static final int CI_ERROR_TYPE_ILLEGAL_ACCESS = 0x2;
public static final int CI_ERROR_TYPE_INCOMPATIBLE_CLASS_CHANGE = 0x3;
public static final int FI_ACCESS_MASK = 0x3;
public static final int FI_PUBLIC = 0x1;
public static final int FI_PRIVATE = 0x2;
public static final int FI_PROTECTED = 0x3;
public static final int FI_STATIC = 0x4;
public static final int FI_FINAL = 0x8;
public static final int FI_VOLATILE = 0x10;
public static final int FI_TRANSIENT = 0x20;
public static final int FI_SYNTHETIC = 0x40;
public static final int FI_ENUM = 0x80;
public static final int FI_ATTRIBUTES = 0x100;
public static final int MI_ACCESS_MASK = 0x3;
public static final int MI_PUBLIC = 0x1;
public static final int MI_PRIVATE = 0x2;
public static final int MI_PROTECTED = 0x3;
public static final int MI_STATIC = 0x4;
public static final int MI_FINAL = 0x8;
public static final int MI_SYNCHRONIZED = 0x10;
public static final int MI_BRIDGE = 0x20;
public static final int MI_VARARGS = 0x40;
public static final int MI_NATIVE = 0x80;
public static final int MI_ABSTRACT = 0x100;
public static final int MI_STRICT = 0x200;
public static final int MI_SYNTHETIC = 0x400;
public static final int MI_ATTRIBUTES = 0x800;
public static final int MI_BRO_BRIDGE = 0x1000;
public static final int MI_BRO_CALLBACK = 0x2000;
public static final int MI_COMPACT_DESC = 0x4000;
public static final int DESC_B = 1;
public static final int DESC_C = 2;
public static final int DESC_D = 3;
public static final int DESC_F = 4;
public static final int DESC_I = 5;
public static final int DESC_J = 6;
public static final int DESC_S = 7;
public static final int DESC_Z = 8;
public static final int DESC_V = 9;
private SootClass sootClass;
private ModuleBuilder mb;
private Set trampolines;
private Set catches;
/**
* Contains the class fields of the class being compiled.
*/
private List classFields;
/**
* Contains the instance fields of the class being compiled.
*/
private List instanceFields;
private StructureType classType;
private StructureType instanceType;
private final Config config;
private final MethodCompiler methodCompiler;
private final BroMethodCompiler bridgeMethodCompiler;
private final CallbackMethodCompiler callbackMethodCompiler;
private final NativeMethodCompiler nativeMethodCompiler;
private final StructMemberMethodCompiler structMemberMethodCompiler;
private final GlobalValueMethodCompiler globalValueMethodCompiler;
private final AttributesEncoder attributesEncoder;
private final TrampolineCompiler trampolineResolver;
private final ByteArrayOutputStream output = new ByteArrayOutputStream(256 * 1024);
public ClassCompiler(Config config) {
this.config = config;
this.methodCompiler = new MethodCompiler(config);
this.bridgeMethodCompiler = new BridgeMethodCompiler(config);
this.callbackMethodCompiler = new CallbackMethodCompiler(config);
this.nativeMethodCompiler = new NativeMethodCompiler(config);
this.structMemberMethodCompiler = new StructMemberMethodCompiler(config);
this.globalValueMethodCompiler = new GlobalValueMethodCompiler(config);
this.attributesEncoder = new AttributesEncoder();
this.trampolineResolver = new TrampolineCompiler(config);
}
public boolean mustCompile(Clazz clazz) {
File oFile = config.getOFile(clazz);
if (!oFile.exists() || oFile.lastModified() < clazz.lastModified() || oFile.length() == 0) {
return true;
}
ClazzInfo ci = clazz.getClazzInfo();
if (ci == null) {
return true;
}
Set dependencies = ci.getDependencies();
for (Dependency dep : dependencies) {
Clazz depClazz = config.getClazzes().load(dep.getClassName());
if (depClazz == null) {
if (dep.getPath() != null) {
// depClazz was available the last time clazz was compiled but is now gone
return true;
}
} else {
if (dep.getPath() == null) {
// depClazz was not available the last time clazz was compiled but is now available
return true;
}
if (!dep.getPath().equals(depClazz.getPath().getFile().getAbsolutePath())) {
// depClazz was located in another place the last time clazz was built
return true;
}
if (depClazz.isInBootClasspath() != dep.isInBootClasspath()) {
// depClazz has moved to/from the bootclasspath since the last time clazz was built
return true;
}
if (depClazz.lastModified() > oFile.lastModified()) {
// depClazz has been changed since the last time clazz was built
return true;
}
}
}
// No class or interface has zero dependencies (we always add java.lang.Object as a dependency)
// If dependencies is empty it probably means that an error occurred while reading the
// serialized dependencies. By returning true here in that case the class will be recompiled
// and the dependencies regenerated.
return dependencies.isEmpty();
}
public void compile(Clazz clazz, Executor executor, ClassCompilerListener listener) throws IOException {
reset();
Arch arch = config.getArch();
OS os = config.getOs();
try {
config.getLogger().debug("Compiling %s (%s %s %s)", clazz, os, arch, config.isDebug() ? "debug" : "release");
output.reset();
compile(clazz, output);
} catch (Throwable t) {
if (t instanceof IOException) {
throw (IOException) t;
}
if (t instanceof RuntimeException) {
throw (RuntimeException) t;
}
throw new RuntimeException(t);
}
List cCode = new ArrayList<>();
cCode.addAll(bridgeMethodCompiler.getCWrapperFunctions());
cCode.addAll(callbackMethodCompiler.getCWrapperFunctions());
scheduleMachineCodeGeneration(executor, listener, config, clazz, output.toByteArray(), cCode);
}
private static void scheduleMachineCodeGeneration(Executor executor, final ClassCompilerListener listener,
final Config config, final Clazz clazz, final byte[] llData, final List cCode) {
Runnable task = new Runnable() {
@Override
public void run() {
try {
generateMachineCode(config, clazz, llData, cCode);
listener.success(clazz);
} catch (Throwable t) {
listener.failure(clazz, t);
}
}
};
try {
executor.execute(task);
} catch (RejectedExecutionException e) {
if (!(executor instanceof ExecutorService) || !((ExecutorService) executor).isShutdown()) {
// The task was rejected, probably because all workers are busy. Run it in this thread instead.
task.run();
}
}
}
private static void generateMachineCode(Config config, Clazz clazz, byte[] llData, List cCode) throws IOException {
if (config.isDumpIntermediates()) {
File llFile = config.getLlFile(clazz);
llFile.getParentFile().mkdirs();
FileUtils.writeByteArrayToFile(llFile, llData);
File cFile = config.getCFile(clazz);
if (cCode.isEmpty()) {
cFile.delete();
} else {
FileUtils.writeLines(cFile, "ascii", cCode);
}
}
File oFile = config.getOFile(clazz);
try (Context context = new Context()) {
try (Module module = Module.parseIR(context, llData, clazz.getClassName())) {
if (!cCode.isEmpty()) {
int size = 0;
for (String s : cCode) {
size += s.length();
}
StringBuilder sb = new StringBuilder(size);
for (String s : cCode) {
sb.append(s);
}
try (Module m2 = Module.parseClangString(context, sb.toString(), clazz.getClassName() + ".c", config.getClangTriple())) {
module.link(m2);
for (org.robovm.llvm.Function f1 : m2.getFunctions()) {
String name = f1.getName();
org.robovm.llvm.Function f2 = module.getFunctionByName(name);
if (Symbols.isBridgeCSymbol(name) || Symbols.isCallbackCSymbol(name) || Symbols.isCallbackInnerCSymbol(name)) {
f2.setLinkage(org.robovm.llvm.binding.Linkage.PrivateLinkage);
if (Symbols.isCallbackInnerCSymbol(name)) {
// TODO: We should also always inline the bridge functions but for some reason
// that makes the RoboVM tests hang indefinitely.
f2.removeAttribute(Attribute.NoInlineAttribute);
f2.addAttribute(Attribute.AlwaysInlineAttribute);
}
}
}
}
}
try (PassManager passManager = createPassManager(config)) {
passManager.run(module);
}
if (config.isDumpIntermediates()) {
File bcFile = config.getBcFile(clazz);
bcFile.getParentFile().mkdirs();
module.writeBitcode(bcFile);
}
String triple = config.getTriple();
Target target = Target.lookupTarget(triple);
try (TargetMachine targetMachine = target.createTargetMachine(triple,
config.getArch().getLlvmCpu(), null, config.isDebug()? CodeGenOptLevel.CodeGenLevelNone: null, null, null)) {
targetMachine.setAsmVerbosityDefault(true);
targetMachine.setFunctionSections(true);
targetMachine.setDataSections(true);
targetMachine.getOptions().setNoFramePointerElim(true);
targetMachine.getOptions().setPositionIndependentExecutable(!config.isDebug()); // NOTE: Doesn't have any effect on x86. See #503.
ByteArrayOutputStream output = new ByteArrayOutputStream(256 * 1024);
targetMachine.emit(module, output, CodeGenFileType.AssemblyFile);
byte[] asm = output.toByteArray();
output.reset();
patchAsmWithFunctionSizes(config, clazz, new ByteArrayInputStream(asm), output);
asm = output.toByteArray();
if (config.isDumpIntermediates()) {
File sFile = config.getSFile(clazz);
sFile.getParentFile().mkdirs();
FileUtils.writeByteArrayToFile(sFile, asm);
}
oFile.getParentFile().mkdirs();
try (BufferedOutputStream oOut = new BufferedOutputStream(new FileOutputStream(oFile))) {
targetMachine.assemble(asm, clazz.getClassName(), oOut);
}
for (CompilerPlugin plugin : config.getCompilerPlugins()) {
plugin.afterObjectFile(config, clazz, oFile);
}
/*
* Read out line number info from the .o file if any and
* assemble into a separate .o file.
*/
String symbolPrefix = config.getOs().getFamily() == OS.Family.darwin ? "_" : "";
symbolPrefix += Symbols.EXTERNAL_SYMBOL_PREFIX;
ModuleBuilder linesMb = null;
try (ObjectFile objectFile = ObjectFile.load(oFile)) {
for (Symbol symbol : objectFile.getSymbols()) {
if (symbol.getSize() > 0 && symbol.getName().startsWith(symbolPrefix)) {
List lineInfos = objectFile.getLineInfos(symbol);
if (!lineInfos.isEmpty()) {
Collections.sort(lineInfos, new Comparator() {
public int compare(LineInfo o1, LineInfo o2) {
return Long.compare(o1.getAddress(), o2.getAddress());
}
});
// The base address of the method which will be used to calculate offsets into the method
long baseAddress = symbol.getAddress();
// The first line number in the method. All other line numbers in the table will be deltas against this.
int firstLineNumber = lineInfos.get(0).getLineNumber();
// Calculate the max address and line number offsets
long maxAddressOffset = 0;
long maxLineOffset = 0;
for (LineInfo lineInfo : lineInfos) {
maxAddressOffset = Math.max(maxAddressOffset, lineInfo.getAddress() - baseAddress);
maxLineOffset = Math.max(maxLineOffset, lineInfo.getLineNumber() - firstLineNumber);
}
// Calculate the number of bytes needed to represent the highest offsets.
// Either 1, 2 or 4 bytes will be used.
int addressOffsetSize = (maxAddressOffset & ~0xff) == 0 ? 1 : ((maxAddressOffset & ~0xffff) == 0 ? 2 : 4);
int lineOffsetSize = (maxLineOffset & ~0xff) == 0 ? 1 : ((maxLineOffset & ~0xffff) == 0 ? 2 : 4);
// The size of the address offsets table. We skip the first LineInfo as its offset is always 0.
int addressOffsetTableSize = addressOffsetSize * (lineInfos.size() - 1);
// Pad size of address offset table to make sure line offsets are aligned properly
int addressOffsetPadding = (lineOffsetSize - (addressOffsetTableSize & (lineOffsetSize - 1))) & (lineOffsetSize - 1);
addressOffsetTableSize += addressOffsetPadding;
// The first 32 bits of the line number info contains the number of line numbers
// minus the first. The 4 most significant bits are used to store the number of
// bytes needed by each entry in each table.
int flags = 0;
flags = addressOffsetSize - 1;
flags <<= 2;
flags |= lineOffsetSize - 1;
flags <<= 28;
flags |= (lineInfos.size() - 1) & 0x0fffffff;
StructureConstantBuilder builder = new StructureConstantBuilder();
builder
.add(new IntegerConstant(flags))
.add(new IntegerConstant(firstLineNumber));
for (LineInfo lineInfo : lineInfos.subList(1, lineInfos.size())) {
if (addressOffsetSize == 1) {
builder.add(new IntegerConstant((byte) (lineInfo.getAddress() - baseAddress)));
} else if (addressOffsetSize == 2) {
builder.add(new IntegerConstant((short) (lineInfo.getAddress() - baseAddress)));
} else {
builder.add(new IntegerConstant((int) (lineInfo.getAddress() - baseAddress)));
}
}
// Padding
for (int i = 0; i < addressOffsetPadding; i++) {
builder.add(new IntegerConstant((byte) 0));
}
for (LineInfo lineInfo : lineInfos.subList(1, lineInfos.size())) {
if (lineOffsetSize == 1) {
builder.add(new IntegerConstant((byte) (lineInfo.getLineNumber() - firstLineNumber)));
} else if (lineOffsetSize == 2) {
builder.add(new IntegerConstant((short) (lineInfo.getLineNumber() - firstLineNumber)));
} else {
builder.add(new IntegerConstant((int) (lineInfo.getLineNumber() - firstLineNumber)));
}
}
// Extract the method's name and descriptor from the symbol and
// build the linetable symbol name.
String methodName = symbol.getName().substring(symbol.getName().lastIndexOf('.') + 1);
methodName = methodName.substring(0, methodName.indexOf('('));
String methodDesc = symbol.getName().substring(symbol.getName().lastIndexOf('('));
String linetableSymbol = Symbols.linetableSymbol(clazz.getInternalName(), methodName, methodDesc);
if (linesMb == null) {
linesMb = new ModuleBuilder();
}
linesMb.addGlobal(new Global(linetableSymbol, builder.build(), true));
}
}
}
}
if (linesMb != null) {
byte[] linesData = linesMb.build().toString().getBytes("UTF-8");
if (config.isDumpIntermediates()) {
File linesLlFile = config.getLinesLlFile(clazz);
linesLlFile.getParentFile().mkdirs();
FileUtils.writeByteArrayToFile(linesLlFile, linesData);
}
try (Module linesModule = Module.parseIR(context, linesData, clazz.getClassName() + ".lines")) {
File linesOFile = config.getLinesOFile(clazz);
targetMachine.emit(linesModule, linesOFile, CodeGenFileType.ObjectFile);
}
} else {
// Make sure there's no stale lines.o file lingering
File linesOFile = config.getLinesOFile(clazz);
if (linesOFile.exists()) {
linesOFile.delete();
}
}
}
}
} catch (Throwable t) {
if (oFile.exists()) {
oFile.delete();
}
if (t instanceof IOException) {
throw (IOException) t;
}
if (t instanceof RuntimeException) {
throw (RuntimeException) t;
}
if (t instanceof Error) {
throw (Error) t;
}
throw new CompilerException(t);
}
}
private static PassManager createPassManager(Config config) {
PassManager passManager = new PassManager();
if (config.isDebug()) {
// Minimal passes. Just inline functions marked 'alwaysinline'.
passManager.addAlwaysInlinerPass();
} else {
try (PassManagerBuilder builder = new PassManagerBuilder()) {
builder.setSetOptLevel(2);
builder.setDisableTailCalls(true);
builder.useAlwaysInliner(true);
builder.populateModulePassManager(passManager);
}
}
return passManager;
}
private static void patchAsmWithFunctionSizes(Config config, Clazz clazz, InputStream inStream, OutputStream outStream) throws IOException {
String labelPrefix = config.getOs().getFamily() == OS.Family.darwin ? "_" : "";
String localLabelPrefix = config.getOs().getFamily() == OS.Family.darwin ? "L" : ".L";
Set functionNames = new HashSet();
for (SootMethod method : clazz.getSootClass().getMethods()) {
if (!method.isAbstract()) {
String name = labelPrefix + Symbols.methodSymbol(method);
functionNames.add(name);
}
}
String infoStructLabel = labelPrefix + Symbols.infoStructSymbol(clazz.getInternalName());
Pattern methodImplPattern = Pattern.compile("\\s*\\.(?:quad|long)\\s+\"?("
+ Pattern.quote(labelPrefix + Symbols.methodSymbolPrefix(clazz.getInternalName()))
+ "[^\\s\"]+)\"?.*");
BufferedReader in = null;
BufferedWriter out = null;
try {
in = new BufferedReader(new InputStreamReader(inStream, "UTF-8"));
out = new BufferedWriter(new OutputStreamWriter(outStream, "UTF-8"));
String line = null;
String currentFunction = null;
while ((line = in.readLine()) != null) {
if (currentFunction == null) {
out.write(line);
out.write('\n');
int colon = line.indexOf(':');
if (colon != -1) {
String label = line.substring(0, colon);
if (label.startsWith("\"") && label.endsWith("\"")) {
label = label.substring(1, label.length() - 1);
}
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("\"");
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');
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);
}
}
private void reset() {
output.reset();
sootClass = null;
mb = null;
trampolines = null;
catches = null;
classFields = null;
instanceFields = null;
classType = null;
instanceType = null;
}
private void compile(Clazz clazz, OutputStream out) throws IOException {
methodCompiler.reset(clazz);
bridgeMethodCompiler.reset(clazz);
callbackMethodCompiler.reset(clazz);
nativeMethodCompiler.reset(clazz);
structMemberMethodCompiler.reset(clazz);
globalValueMethodCompiler.reset(clazz);
ClazzInfo ci = clazz.resetClazzInfo();
mb = new ModuleBuilder();
for (CompilerPlugin compilerPlugin : config.getCompilerPlugins()) {
compilerPlugin.beforeClass(config, clazz, mb);
}
sootClass = clazz.getSootClass();
trampolines = new HashSet();
catches = new HashSet();
classFields = getClassFields(config.getOs(), config.getArch(),sootClass);
instanceFields = getInstanceFields(config.getOs(), config.getArch(),sootClass);
classType = getClassType(config.getOs(), config.getArch(),sootClass);
instanceType = getInstanceType(config.getOs(), config.getArch(),sootClass);
attributesEncoder.encode(mb, sootClass);
// Add a method if the class has ConstantValueTags but no .
// 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("") && hasConstantValueTags(classFields)) {
SootMethod clinit = new SootMethod("", 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)) {
SootMethod _sizeOf = new SootMethod("_sizeOf", Collections.EMPTY_LIST, IntType.v(), Modifier.PROTECTED | Modifier.NATIVE);
sootClass.addMethod(_sizeOf);
SootMethod sizeOf = new SootMethod("sizeOf", Collections.EMPTY_LIST, IntType.v(), Modifier.PUBLIC | Modifier.STATIC | Modifier.NATIVE);
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(createLdcClass());
mb.addFunction(createLdcClassWrapper());
Function allocator = createAllocator();
mb.addFunction(allocator);
mb.addFunction(createClassInitWrapperFunction(allocator.ref()));
for (SootField f : sootClass.getFields()) {
Function getter = createFieldGetter(f, classFields, classType, instanceFields, instanceType);
Function setter = createFieldSetter(f, classFields, classType, instanceFields, instanceType);
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()) {
for (CompilerPlugin compilerPlugin : config.getCompilerPlugins()) {
compilerPlugin.beforeMethod(config, clazz, method, mb);
}
String name = method.getName();
Function function = null;
if (hasBridgeAnnotation(method)) {
function = bridgeMethod(method);
} else if (hasGlobalValueAnnotation(method)) {
function = globalValueMethod(method);
} else if (isStruct(sootClass) && ("_sizeOf".equals(name)
|| "sizeOf".equals(name) || hasStructMemberAnnotation(method))) {
function = structMember(method);
} else if (method.isNative()) {
function = nativeMethod(method);
} else if (!method.isAbstract()) {
function = method(method);
}
if (hasCallbackAnnotation(method)) {
callbackMethod(method);
}
if (!name.equals("") && !name.equals("")
&& !method.isPrivate() && !method.isStatic()
&& !Modifier.isFinal(method.getModifiers())
&& !Modifier.isFinal(sootClass.getModifiers())) {
createLookupFunction(method);
}
if (method.isStatic()) {
String fnName = method.isSynchronized()
? Symbols.synchronizedWrapperSymbol(method)
: Symbols.methodSymbol(method);
FunctionRef fn = new FunctionRef(fnName, getFunctionType(method));
mb.addFunction(createClassInitWrapperFunction(fn));
}
for (CompilerPlugin compilerPlugin : config.getCompilerPlugins()) {
if (function != null) {
compilerPlugin.afterMethod(config, clazz, method, mb, function);
}
}
}
Set trampolineDependencies = new HashSet();
for (Trampoline trampoline : trampolines) {
trampolineResolver.compile(mb, trampoline);
trampolineDependencies.addAll(trampolineResolver.getDependencies());
}
Global classInfoStruct = null;
try {
if (!sootClass.isInterface()) {
config.getVTableCache().get(sootClass);
}
classInfoStruct = new Global(Symbols.infoStructSymbol(clazz.getInternalName()), Linkage.weak, createClassInfoStruct());
} catch (IllegalArgumentException e) {
// VTable throws this if any of the superclasses of the class is actually an interface.
// Shouldn't happen frequently but the DRLVM test suite has some tests for this.
// The Linker will take care of making sure the class cannot be loaded at runtime.
classInfoStruct = new Global(Symbols.infoStructSymbol(clazz.getInternalName()), I8_PTR, true);
}
mb.addGlobal(classInfoStruct);
Function infoFn = FunctionBuilder.infoStruct(sootClass);
infoFn.add(new Ret(new ConstantBitcast(classInfoStruct.ref(), I8_PTR_PTR)));
mb.addFunction(infoFn);
for (CompilerPlugin compilerPlugin : config.getCompilerPlugins()) {
compilerPlugin.afterClass(config, clazz, mb);
}
OutputStreamWriter writer = new OutputStreamWriter(out, "UTF-8");
mb.build().write(writer);
writer.flush();
ci.setCatchNames(catches);
ci.setTrampolines(trampolines);
ci.addDependency("java/lang/Object"); // Make sure no class or interface has zero dependencies
if (sootClass.hasSuperclass() && !sootClass.isInterface()) {
ci.addDependency(getInternalName(sootClass.getSuperclass()));
}
for (SootClass iface : sootClass.getInterfaces()) {
ci.addDependency(getInternalName(iface));
}
for (SootField f : sootClass.getFields()) {
addDependencyIfNeeded(clazz, f.getType());
}
for (SootMethod m : sootClass.getMethods()) {
addDependencyIfNeeded(clazz, m.getReturnType());
@SuppressWarnings("unchecked")
List paramTypes = (List) m.getParameterTypes();
for (soot.Type type : paramTypes) {
addDependencyIfNeeded(clazz, type);
}
}
ci.addDependencies(attributesEncoder.getDependencies());
ci.addDependencies(trampolineDependencies);
ci.addDependencies(catches);
for (Trampoline t : trampolines) {
{
String desc = t.getTarget();
if (desc.charAt(0) == 'L' || desc.charAt(0) == '[') {
// Target is a descriptor
addDependencyIfNeeded(clazz, desc);
} else {
ci.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.saveClazzInfo();
}
private static void addDependencyIfNeeded(Clazz clazz, soot.Type type) {
if (type instanceof RefLikeType) {
addDependencyIfNeeded(clazz, getDescriptor(type));
}
}
private static void addDependencyIfNeeded(Clazz clazz, String desc) {
if (!isPrimitive(desc) && (!isArray(desc) || !isPrimitiveBaseType(desc))) {
String internalName = isArray(desc) ? getBaseType(desc) : getInternalNameFromDescriptor(desc);
if (!clazz.getInternalName().equals(internalName)) {
clazz.getClazzInfo().addDependency(internalName);
}
}
}
private void createLookupFunction(SootMethod m) {
// TODO: This should use a virtual method table or interface method table.
Function function = FunctionBuilder.lookup(m, true);
mb.addFunction(function);
Variable reserved0 = function.newVariable(I8_PTR_PTR);
function.add(new Getelementptr(reserved0, function.getParameterRef(0), 0, 4));
Variable reserved1 = function.newVariable(I8_PTR_PTR);
function.add(new Getelementptr(reserved1, function.getParameterRef(0), 0, 5));
function.add(new Store(getString(m.getName()), reserved0.ref()));
function.add(new Store(getString(getDescriptor(m)), reserved1.ref()));
if (!sootClass.isInterface()) {
int vtableIndex = 0;
try {
VTable vtable = config.getVTableCache().get(sootClass);
vtableIndex = vtable.getEntry(m).getIndex();
} catch (IllegalArgumentException e) {
// VTable throws this if any of the superclasses of the class is actually an interface.
// Shouldn't happen frequently but the DRLVM test suite has some tests for this.
// Use 0 as vtableIndex since this lookup function will never be called anyway.
}
Value classPtr = call(function, OBJECT_CLASS, function.getParameterRef(1));
Value vtablePtr = call(function, CLASS_VITABLE, classPtr);
Variable funcPtrPtr = function.newVariable(I8_PTR_PTR);
function.add(new Getelementptr(funcPtrPtr, vtablePtr, 0, 1, vtableIndex));
Variable funcPtr = function.newVariable(I8_PTR);
function.add(new Load(funcPtr, funcPtrPtr.ref()));
Variable f = function.newVariable(function.getType());
function.add(new Bitcast(f, funcPtr.ref(), f.getType()));
Value result = tailcall(function, f.ref(), function.getParameterRefs());
function.add(new Ret(result));
} else {
ITable itable = config.getITableCache().get(sootClass);
ITable.Entry entry = itable.getEntry(m);
List args = new ArrayList();
args.add(function.getParameterRef(0));
args.add(getInfoStruct(function, sootClass));
args.add(function.getParameterRef(1));
args.add(new IntegerConstant(entry.getIndex()));
Value fptr = call(function, BC_LOOKUP_INTERFACE_METHOD_IMPL, args);
Variable f = function.newVariable(function.getType());
function.add(new Bitcast(f, fptr, f.getType()));
Value result = tailcall(function, f.ref(), function.getParameterRefs());
function.add(new Ret(result));
}
}
private Constant createVTableStruct() {
VTable vtable = config.getVTableCache().get(sootClass);
String name = Symbols.vtableSymbol(getInternalName(sootClass));
for (VTable.Entry entry : vtable.getEntries()) {
FunctionRef fref = entry.getFunctionRef();
if (fref != null && !mb.hasSymbol(fref.getName())) {
mb.addFunctionDeclaration(new FunctionDeclaration(fref));
}
}
Global vtableStruct = new Global(name, Linkage._private, vtable.getStruct(), true);
mb.addGlobal(vtableStruct);
return new ConstantBitcast(vtableStruct.ref(), I8_PTR);
}
private Constant createITableStruct() {
ITable itable = config.getITableCache().get(sootClass);
String name = Symbols.itableSymbol(getInternalName(sootClass));
Global itableStruct = new Global(name, Linkage._private, itable.getStruct(), true);
mb.addGlobal(itableStruct);
return new ConstantBitcast(itableStruct.ref(), I8_PTR);
}
private Constant createITablesStruct() {
if (!sootClass.isInterface()) {
HashSet interfaces = new HashSet();
collectInterfaces(sootClass, interfaces);
List tables = new ArrayList();
int i = 0;
for (SootClass ifs : interfaces) {
ITable itable = config.getITableCache().get(ifs);
if (itable.size() > 0) {
String name = Symbols.itableSymbol(getInternalName(sootClass), i++);
String typeInfoName = Symbols.typeInfoSymbol(getInternalName(ifs));
if (!mb.hasSymbol(typeInfoName)) {
mb.addGlobal(new Global(typeInfoName, Linkage.external, I8_PTR, true));
}
Global itableStruct = new Global(name, Linkage._private,
new StructureConstantBuilder()
.add(mb.getGlobalRef(typeInfoName))
.add(itable.getStruct(mb, sootClass)).build(), true);
mb.addGlobal(itableStruct);
tables.add(new ConstantBitcast(itableStruct.ref(), I8_PTR));
}
}
if (tables.isEmpty()) {
return new NullConstant(I8_PTR);
} else {
Global itablesStruct = new Global(Symbols.itablesSymbol(getInternalName(sootClass)), Linkage._private,
new StructureConstantBuilder()
.add(new IntegerConstant((short) tables.size()))
.add(tables.get(0)) // cache value must never be null
.add(new ArrayConstantBuilder(I8_PTR).add(tables).build())
.build());
mb.addGlobal(itablesStruct);
return new ConstantBitcast(itablesStruct.ref(), I8_PTR);
}
} else {
return new NullConstant(I8_PTR);
}
}
private StructureConstant createClassInfoStruct() {
int flags = 0;
if (Modifier.isPublic(sootClass.getModifiers())) {
flags |= CI_PUBLIC;
}
if (Modifier.isFinal(sootClass.getModifiers())) {
flags |= CI_FINAL;
}
if (Modifier.isInterface(sootClass.getModifiers())) {
flags |= CI_INTERFACE;
}
if (Modifier.isAbstract(sootClass.getModifiers())) {
flags |= CI_ABSTRACT;
}
if ((sootClass.getModifiers() & 0x1000) > 0) {
flags |= CI_SYNTHETIC;
}
if (Modifier.isAnnotation(sootClass.getModifiers())) {
flags |= CI_ANNOTATION;
}
if (Modifier.isEnum(sootClass.getModifiers())) {
flags |= CI_ENUM;
}
if (attributesEncoder.classHasAttributes()) {
flags |= CI_ATTRIBUTES;
}
if (hasFinalizer(sootClass)) {
flags |= CI_FINALIZABLE;
}
// Create the ClassInfoHeader structure.
StructureConstantBuilder header = new StructureConstantBuilder();
header.add(new NullConstant(I8_PTR)); // Points to the runtime Class struct
header.add(new IntegerConstant(flags));
header.add(getString(getInternalName(sootClass)));
if (sootClass.declaresMethod("", Collections.emptyList(), VoidType.v())) {
SootMethod method = sootClass.getMethod("", Collections.emptyList(), VoidType.v());
header.add(new FunctionRef(Symbols.methodSymbol(method), getFunctionType(method)));
} else {
header.add(new NullConstant(I8_PTR));
}
mb.addGlobal(new Global(Symbols.typeInfoSymbol(getInternalName(sootClass)), Linkage.external, I8_PTR, true));
header.add(new GlobalRef(Symbols.typeInfoSymbol(getInternalName(sootClass)), I8_PTR)); // TypeInfo* generated by Linker
if (!sootClass.isInterface()) {
header.add(createVTableStruct());
} else {
header.add(createITableStruct());
}
header.add(createITablesStruct());
header.add(sizeof(classType));
header.add(sizeof(instanceType));
if (!instanceFields.isEmpty()) {
header.add(offsetof(instanceType, 1, 1));
} else {
header.add(sizeof(instanceType));
}
header.add(new IntegerConstant((short) countReferences(classFields)));
header.add(new IntegerConstant((short) countReferences(instanceFields)));
PackedStructureConstantBuilder body = new PackedStructureConstantBuilder();
body.add(new IntegerConstant((short) sootClass.getInterfaceCount()));
body.add(new IntegerConstant((short) sootClass.getFieldCount()));
body.add(new IntegerConstant((short) sootClass.getMethodCount()));
if (!sootClass.isInterface()) {
body.add(getStringOrNull(sootClass.hasSuperclass() ? getInternalName(sootClass.getSuperclass()) : null));
}
if (attributesEncoder.classHasAttributes()) {
body.add(new ConstantBitcast(attributesEncoder.getClassAttributes().ref(), I8_PTR));
}
for (SootClass s : sootClass.getInterfaces()) {
body.add(getString(getInternalName(s)));
}
for (SootField f : sootClass.getFields()) {
flags = 0;
soot.Type t = f.getType();
if (t instanceof PrimType) {
if (t.equals(BooleanType.v())) {
flags |= DESC_Z;
} else if (t.equals(ByteType.v())) {
flags |= DESC_B;
} else if (t.equals(ShortType.v())) {
flags |= DESC_S;
} else if (t.equals(CharType.v())) {
flags |= DESC_C;
} else if (t.equals(IntType.v())) {
flags |= DESC_I;
} else if (t.equals(LongType.v())) {
flags |= DESC_J;
} else if (t.equals(FloatType.v())) {
flags |= DESC_F;
} else if (t.equals(DoubleType.v())) {
flags |= DESC_D;
}
flags <<= 12;
}
if (Modifier.isPublic(f.getModifiers())) {
flags |= FI_PUBLIC;
} else if (Modifier.isPrivate(f.getModifiers())) {
flags |= FI_PRIVATE;
} else if (Modifier.isProtected(f.getModifiers())) {
flags |= FI_PROTECTED;
}
if (Modifier.isStatic(f.getModifiers())) {
flags |= FI_STATIC;
}
if (Modifier.isFinal(f.getModifiers())) {
flags |= FI_FINAL;
}
if (Modifier.isVolatile(f.getModifiers())) {
flags |= FI_VOLATILE;
}
if (Modifier.isTransient(f.getModifiers())) {
flags |= FI_TRANSIENT;
}
if ((f.getModifiers() & 0x1000) > 0) {
flags |= FI_SYNTHETIC;
}
if (Modifier.isEnum(f.getModifiers())) {
flags |= FI_ENUM;
}
if (attributesEncoder.fieldHasAttributes(f)) {
flags |= FI_ATTRIBUTES;
}
body.add(new IntegerConstant((short) flags));
body.add(getString(f.getName()));
if (!(t instanceof PrimType)) {
body.add(getString(getDescriptor(f)));
}
if (f.isStatic()) {
int index = classFields.indexOf(f);
body.add(offsetof(classType, 1, index, 1));
} else {
int index = instanceFields.indexOf(f);
body.add(offsetof(instanceType, 1, 1 + index, 1));
}
if (attributesEncoder.fieldHasAttributes(f)) {
body.add(new ConstantBitcast(attributesEncoder.getFieldAttributes(f).ref(), I8_PTR));
}
}
VTable vtable = !sootClass.isInterface() ? config.getVTableCache().get(sootClass) : null;
ITable itable = sootClass.isInterface() ? config.getITableCache().get(sootClass) : null;;
for (SootMethod m : sootClass.getMethods()) {
soot.Type t = m.getReturnType();
flags = 0;
if (Modifier.isPublic(m.getModifiers())) {
flags |= MI_PUBLIC;
} else if (Modifier.isPrivate(m.getModifiers())) {
flags |= MI_PRIVATE;
} else if (Modifier.isProtected(m.getModifiers())) {
flags |= MI_PROTECTED;
}
if (Modifier.isStatic(m.getModifiers())) {
flags |= MI_STATIC;
}
if (Modifier.isFinal(m.getModifiers())) {
flags |= MI_FINAL;
}
if (Modifier.isSynchronized(m.getModifiers())) {
flags |= MI_SYNCHRONIZED;
}
if ((m.getModifiers() & 0x0040) > 0) {
flags |= MI_BRIDGE;
}
if ((m.getModifiers() & 0x0080) > 0) {
flags |= MI_VARARGS;
}
if (Modifier.isNative(m.getModifiers())) {
if (!isStruct(sootClass) && !hasStructMemberAnnotation(m)) {
flags |= MI_NATIVE;
}
}
if (Modifier.isAbstract(m.getModifiers())) {
flags |= MI_ABSTRACT;
}
if (Modifier.isStrictFP(m.getModifiers())) {
flags |= MI_STRICT;
}
if ((m.getModifiers() & 0x1000) > 0) {
flags |= MI_SYNTHETIC;
}
if (attributesEncoder.methodHasAttributes(m)) {
flags |= MI_ATTRIBUTES;
}
if (hasBridgeAnnotation(m) || hasGlobalValueAnnotation(m)) {
flags |= MI_BRO_BRIDGE;
}
if (hasCallbackAnnotation(m)) {
flags |= MI_BRO_CALLBACK;
}
if ((t instanceof PrimType || t == VoidType.v()) && m.getParameterCount() == 0) {
flags |= MI_COMPACT_DESC;
}
body.add(new IntegerConstant((short) flags));
Constant viTableIndex = new IntegerConstant((short) -1);
if (vtable != null) {
VTable.Entry entry = vtable.getEntry(m);
if (entry != null) {
viTableIndex = new IntegerConstant((short) entry.getIndex());
}
} else {
ITable.Entry entry = itable.getEntry(m);
if (entry != null) {
viTableIndex = new IntegerConstant((short) entry.getIndex());
}
}
body.add(viTableIndex);
body.add(getString(m.getName()));
if ((flags & MI_COMPACT_DESC) > 0) {
int desc = 0;
if (t.equals(BooleanType.v())) {
desc = DESC_Z;
} else if (t.equals(ByteType.v())) {
desc = DESC_B;
} else if (t.equals(ShortType.v())) {
desc = DESC_S;
} else if (t.equals(CharType.v())) {
desc = DESC_C;
} else if (t.equals(IntType.v())) {
desc = DESC_I;
} else if (t.equals(LongType.v())) {
desc = DESC_J;
} else if (t.equals(FloatType.v())) {
desc = DESC_F;
} else if (t.equals(DoubleType.v())) {
desc = DESC_D;
} else if (t.equals(VoidType.v())) {
desc = DESC_V;
}
body.add(new IntegerConstant((byte) desc));
} else {
body.add(getString(getDescriptor(m)));
}
if (attributesEncoder.methodHasAttributes(m)) {
body.add(new ConstantBitcast(attributesEncoder.getMethodAttributes(m).ref(), I8_PTR));
}
if (!m.isAbstract()) {
body.add(new ConstantBitcast(new FunctionRef(Symbols.methodSymbol(m), getFunctionType(m)), I8_PTR));
body.add(new IntegerConstant(DUMMY_METHOD_SIZE)); // Size of function. This value will be modified later by patching the .s file.
if (m.isSynchronized()) {
body.add(new ConstantBitcast(new FunctionRef(Symbols.synchronizedWrapperSymbol(m), getFunctionType(m)), I8_PTR));
}
if ((flags & MI_NATIVE) == 0) {
// Cannot use m.isNative() in the condition above since methods which are native in the
// Java class file may have been changed to non-native by the RoboVM compiler
// (e.g. @StructMember methods). The native code which parses the info structs will see
// the method as non-native.
// Add a weak linetable pointer which points to a -1 value which will be interpreted as 0 linenumbers in the table
Global linetableGlobal = new Global(Symbols.linetableSymbol(m), Linkage.weak, new IntegerConstant(-1));
mb.addGlobal(linetableGlobal);
body.add(linetableGlobal.ref());
}
}
if (hasBridgeAnnotation(m)) {
if (!readBooleanElem(getAnnotation(m, BRIDGE), "dynamic", false)) {
body.add(new GlobalRef(Symbols.bridgePtrSymbol(m), I8_PTR));
} else {
body.add(new NullConstant(I8_PTR));
}
} else if (hasGlobalValueAnnotation(m)) {
body.add(new GlobalRef(Symbols.globalValuePtrSymbol(m), I8_PTR));
}
if (hasCallbackAnnotation(m)) {
body.add(new AliasRef(Symbols.callbackPtrSymbol(m), I8_PTR));
}
}
// Return the struct {header, body}. To be compatible with the C code in classinfo.c
// it is important that the header is padded the same as in C so that the body starts
// after sizeof(ClassInfoHeader) bytes.
return new StructureConstantBuilder().add(header.build()).add(body.build()).build();
}
private Function nativeMethod(SootMethod method) {
Function fn = nativeMethodCompiler.compile(mb, method);
trampolines.addAll(nativeMethodCompiler.getTrampolines());
catches.addAll(nativeMethodCompiler.getCatches());
return fn;
}
private Function bridgeMethod(SootMethod method) {
Function fn = bridgeMethodCompiler.compile(mb, method);
trampolines.addAll(bridgeMethodCompiler.getTrampolines());
catches.addAll(bridgeMethodCompiler.getCatches());
return fn;
}
private Function callbackMethod(SootMethod method) {
Function fn = callbackMethodCompiler.compile(mb, method);
trampolines.addAll(callbackMethodCompiler.getTrampolines());
catches.addAll(callbackMethodCompiler.getCatches());
return fn;
}
private Function structMember(SootMethod method) {
Function fn = structMemberMethodCompiler.compile(mb, method);
trampolines.addAll(structMemberMethodCompiler.getTrampolines());
catches.addAll(structMemberMethodCompiler.getCatches());
return fn;
}
private Function globalValueMethod(SootMethod method) {
Function fn = globalValueMethodCompiler.compile(mb, method);
trampolines.addAll(globalValueMethodCompiler.getTrampolines());
catches.addAll(globalValueMethodCompiler.getCatches());
return fn;
}
private Function method(SootMethod method) {
Function fn = methodCompiler.compile(mb, method);
trampolines.addAll(methodCompiler.getTrampolines());
catches.addAll(methodCompiler.getCatches());
return fn;
}
private Function createAllocator() {
Function fn = FunctionBuilder.allocator(sootClass);
Value info = getInfoStruct(fn, sootClass);
Value result = call(fn, BC_ALLOCATE, fn.getParameterRef(0), info);
fn.add(new Ret(result));
return fn;
}
private Function createLdcClass() {
Function fn = FunctionBuilder.ldcInternal(sootClass);
Value info = getInfoStruct(fn, sootClass);
Value result = call(fn, BC_LDC_CLASS, fn.getParameterRef(0), info);
fn.add(new Ret(result));
return fn;
}
private Function createLdcClassWrapper() {
Function fn = FunctionBuilder.ldcExternal(sootClass);
Value info = getInfoStruct(fn, sootClass);
Value result = call(fn, LDC_CLASS_WRAPPER, fn.getParameterRef(0), info);
fn.add(new Ret(result));
return fn;
}
static Function createFieldGetter(SootField field, List classFields,
StructureType classType, List instanceFields, StructureType instanceType) {
Function fn = FunctionBuilder.getter(field);
return createFieldGetter(fn, field, classFields, classType, instanceFields, instanceType);
}
static Function createFieldGetter(Function fn, SootField field, List classFields,
StructureType classType, List instanceFields, StructureType instanceType) {
Value fieldPtr = null;
if (field.isStatic()) {
fieldPtr = getClassFieldPtr(fn, field, classFields, classType);
} else {
fieldPtr = getInstanceFieldPtr(fn, fn.getParameterRef(1), field, instanceFields, instanceType);
}
Variable result = fn.newVariable(getType(field.getType()));
if (Modifier.isVolatile(field.getModifiers())) {
fn.add(new Fence(Ordering.seq_cst));
if (LongType.v().equals(field.getType())) {
fn.add(new Load(result, fieldPtr, false, Ordering.unordered, 8));
} else {
fn.add(new Load(result, fieldPtr));
}
} else {
fn.add(new Load(result, fieldPtr));
}
fn.add(new Ret(new VariableRef(result)));
return fn;
}
static Function createFieldSetter(SootField field, List classFields,
StructureType classType, List instanceFields, StructureType instanceType) {
Function fn = FunctionBuilder.setter(field);
return createFieldSetter(fn, field, classFields, classType, instanceFields, instanceType);
}
static Function createFieldSetter(Function fn, SootField field, List classFields,
StructureType classType, List instanceFields, StructureType instanceType) {
Value fieldPtr = null;
Value value = null;
if (field.isStatic()) {
fieldPtr = getClassFieldPtr(fn, field, classFields, classType);
value = fn.getParameterRef(1);
} else {
fieldPtr = getInstanceFieldPtr(fn, fn.getParameterRef(1), field, instanceFields, instanceType);
value = fn.getParameterRef(2);
}
if (Modifier.isVolatile(field.getModifiers()) || !field.isStatic() && Modifier.isFinal(field.getModifiers())) {
if (LongType.v().equals(field.getType())) {
fn.add(new Store(value, fieldPtr, false, Ordering.unordered, 8));
} else {
fn.add(new Store(value, fieldPtr));
}
fn.add(new Fence(Ordering.seq_cst));
} else {
fn.add(new Store(value, fieldPtr));
}
fn.add(new Ret());
return fn;
}
private Function createClassInitWrapperFunction(FunctionRef targetFn) {
Function fn = FunctionBuilder.clinitWrapper(targetFn);
Value info = getInfoStruct(fn, sootClass);
Variable infoHeader = fn.newVariable(new PointerType(new StructureType(I8_PTR, I32)));
fn.add(new Bitcast(infoHeader, info, infoHeader.getType()));
Variable infoHeaderFlags = fn.newVariable(new PointerType(I32));
fn.add(new Getelementptr(infoHeaderFlags, infoHeader.ref(), 0, 1));
Variable flags = fn.newVariable(I32);
fn.add(new Load(flags, infoHeaderFlags.ref()));
Variable initializedFlag = fn.newVariable(I32);
fn.add(new And(initializedFlag, flags.ref(), new IntegerConstant(CI_INITIALIZED)));
Variable initialized = fn.newVariable(I1);
fn.add(new Icmp(initialized, Icmp.Condition.eq, initializedFlag.ref(), new IntegerConstant(CI_INITIALIZED)));
Label trueLabel = new Label();
Label falseLabel = new Label();
fn.add(new Br(initialized.ref(), fn.newBasicBlockRef(trueLabel), fn.newBasicBlockRef(falseLabel)));
fn.newBasicBlock(trueLabel);
Value result = call(fn, targetFn, fn.getParameterRefs());
fn.add(new Ret(result));
fn.newBasicBlock(falseLabel);
call(fn, BC_INITIALIZE_CLASS, fn.getParameterRef(0), info);
fn.add(new Br(fn.newBasicBlockRef(trueLabel)));
return fn;
}
private static int countReferences(List l) {
int count = 0;
for (SootField f : l) {
if (f.getType() instanceof RefLikeType) {
count++;
}
}
return count;
}
private static void collectInterfaces(SootClass clazz, Set interfaces) {
if (clazz.hasSuperclass()) {
collectInterfaces(clazz.getSuperclass(), interfaces);
}
if (clazz.isInterface()) {
interfaces.add(clazz);
}
for (SootClass sc : clazz.getInterfaces()) {
collectInterfaces(sc, interfaces);
}
}
private static boolean hasConstantValueTags(List classFields) {
for (SootField field : classFields) {
for (Tag tag : field.getTags()) {
if (tag instanceof ConstantValueTag) {
return true;
}
}
}
return false;
}
private static boolean hasFinalizer(SootClass clazz) {
// Don't search interfaces or java.lang.Object
if (clazz.isInterface() || !clazz.hasSuperclass()) {
return false;
}
return clazz.declaresMethod("finalize", Collections.emptyList(), VoidType.v());
}
private Constant getString(String string) {
return mb.getString(string);
}
private Constant getStringOrNull(String string) {
return mb.getStringOrNull(string);
}
static Value getClassFieldPtr(Function f, SootField field, List classFields,
StructureType classType) {
Value info = getInfoStruct(f, field.getDeclaringClass());
Variable base = f.newVariable(I8_PTR);
f.add(new Load(base, info));
return getFieldPtr(f, new VariableRef(base), offsetof(classType, 1,
classFields.indexOf(field), 1), getType(field.getType()));
}
static Value getInfoStruct(Function f, SootClass sootClass) {
return call(f, FunctionBuilder.infoStruct(sootClass).ref());
}
static Value getInstanceFieldPtr(Function f, Value base, SootField field,
List instanceFields, StructureType instanceType) {
return getFieldPtr(f, base, offsetof(instanceType, 1,
1 + instanceFields.indexOf(field), 1), getType(field.getType()));
}
}
