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|
//-----------------------------------------------------------------------------
//
// Copyright (C) Microsoft Corporation. All Rights Reserved.
//
//-----------------------------------------------------------------------------
using System;
using System.Linq;
using System.IO;
using Microsoft.Cci;
using Microsoft.Cci.MetadataReader;
using Microsoft.Cci.MutableCodeModel;
using System.Collections.Generic;
using Microsoft.Cci.Contracts;
using Microsoft.Cci.ILToCodeModel;
using Microsoft.Cci.MutableContracts;
using Bpl = Microsoft.Boogie;
using System.Diagnostics.Contracts;
using Microsoft.Cci.MutableCodeModel.Contracts;
using TranslationPlugins;
using BytecodeTranslator.Phone;
using System.Text.RegularExpressions;
using BytecodeTranslator.TranslationPlugins;
using BytecodeTranslator.TranslationPlugins.BytecodeTranslator;
using BytecodeTranslator.TranslationPlugins.PhoneTranslator;
namespace BytecodeTranslator {
public class Options : OptionParsing {
[OptionDescription("The names of the assemblies to use as input", ShortForm = "a")]
public List<string> assemblies = null;
[OptionDescription("Break into debugger", ShortForm = "break")]
public bool breakIntoDebugger = false;
[OptionDescription("Emit a 'capture state' directive after each statement, (default: false)", ShortForm = "c")]
public bool captureState = false;
[OptionDescription("Translation should be done for Get Me Here functionality, (default: false)", ShortForm = "gmh")]
public bool getMeHere = false;
[OptionDescription("Search paths for assembly dependencies.", ShortForm = "lib")]
public List<string> libpaths = new List<string>();
public enum HeapRepresentation { splitFields, twoDInt, twoDBox, general }
[OptionDescription("Heap representation to use", ShortForm = "heap")]
public HeapRepresentation heapRepresentation = HeapRepresentation.general;
[OptionDescription("Translate using whole-program assumptions", ShortForm = "whole")]
public bool wholeProgram = false;
[OptionDescription("Stub assembly", ShortForm = "s")]
public List<string>/*?*/ stub = null;
[OptionDescription("Phone translation controls configuration")]
public string phoneControls = null;
[OptionDescription("Add phone navigation code on translation. Requires /phoneControls. Default false", ShortForm = "wpnav")]
public bool phoneNavigationCode= false;
[OptionDescription("Add phone feedback code on translation. Requires /phoneControls. Default false", ShortForm = "wpfb")]
public bool phoneFeedbackCode = false;
[OptionDescription("File containing white/black list (optionally end file name with + for white list, - for black list, default is white list", ShortForm = "exempt")]
public string exemptionFile = "";
[OptionDescription("Instrument branches with unique counter values", ShortForm = "ib")]
public bool instrumentBranches = false;
[OptionDescription("Add free ensures that express heap monotonicity", ShortForm = "heapM")]
public bool monotonicHeap = false;
public enum Dereference { Assert, Assume, None, }
[OptionDescription("Assert/Assume on all object dereferences", ShortForm = "deref")]
public Dereference dereference = Dereference.Assume;
}
public class BCT {
public static IMetadataHost Host;
static int Main(string[] args)
{
int errorReturnValue = -1;
#region Parse options and check for errors
var options = new Options();
options.Parse(args);
if (options.HelpRequested) {
options.PrintOptions("");
return errorReturnValue;
}
if (options.HasErrors) {
options.PrintErrorsAndExit(Console.Out);
}
if (!String.IsNullOrWhiteSpace(options.exemptionFile)) {
string fileName = options.exemptionFile;
var c = fileName[fileName.Length - 1];
if (c == '+' || c == '-') fileName = options.exemptionFile.Remove(fileName.Length - 1);
if (!File.Exists(fileName)) {
Console.WriteLine("Specified exemption file '{0}' not found.", fileName);
}
}
if (options.stub != null) {
Console.WriteLine("/s is no longer used to specify stub assemblies");
return errorReturnValue;
}
if (options.breakIntoDebugger) {
System.Diagnostics.Debugger.Break();
}
#endregion
var assemblyNames = options.assemblies;
if (assemblyNames == null || assemblyNames.Count == 0) {
assemblyNames = new List<string>();
foreach (var g in options.GeneralArguments) {
assemblyNames.Add(g);
}
}
#region If an exclusion file has been specified, read in each line as a regular expression
List<Regex> exemptionList = null;
bool whiteList = false;
if (!String.IsNullOrWhiteSpace(options.exemptionFile)) {
int i = 0;
exemptionList = new List<Regex>();
string fileName = options.exemptionFile;
var c = fileName[fileName.Length - 1];
whiteList = true;
if (c == '+' || c == '-') {
fileName = options.exemptionFile.Remove(fileName.Length - 1);
if (c == '-') whiteList = false;
}
try {
// Create an instance of StreamReader to read from a file.
// The using statement also closes the StreamReader.
using (StreamReader sr = new StreamReader(fileName)) {
String line;
// Read and display lines from the file until the end of
// the file is reached.
while ((line = sr.ReadLine()) != null) {
exemptionList.Add(new Regex(line));
i++;
}
//Console.WriteLine("Read {0} lines from the exclusion file '{1}'.",
// i, options.exemptionFile);
}
} catch (Exception e) {
Console.WriteLine("Something went wrong reading the exclusion file '{0}'; read in {1} lines, continuing processing.",
fileName, i);
Console.WriteLine(e.Message);
}
}
#endregion
try {
HeapFactory heap;
switch (options.heapRepresentation) {
case Options.HeapRepresentation.splitFields:
heap = new SplitFieldsHeap();
break;
case Options.HeapRepresentation.general:
heap = new GeneralHeap();
break;
default:
Console.WriteLine("Unknown setting for /heap");
return 1;
}
if ((options.phoneFeedbackCode || options.phoneNavigationCode) && (options.phoneControls == null || options.phoneControls == "")) {
Console.WriteLine("Options /phoneNavigationCode and /phoneFeedbackCode need /phoneControls option set.");
return 1;
}
var pgm = TranslateAssembly(assemblyNames, heap, options, exemptionList, whiteList);
var fileName = assemblyNames[0];
fileName = Path.GetFileNameWithoutExtension(fileName);
string outputFileName = fileName + ".bpl";
Microsoft.Boogie.TokenTextWriter writer = new Microsoft.Boogie.TokenTextWriter("_" + outputFileName);
Prelude.Emit(writer);
pgm.Emit(writer);
writer.Close();
return Inline(outputFileName);
} catch (Exception e) { // swallow everything and just return an error code
Console.WriteLine("The byte-code translator failed: {0}", e.Message);
// Console.WriteLine("Stack trace: {0}", e.StackTrace);
return -1;
}
}
private static List<IModule> modules;
public static int Inline(string bplFileName) {
Bpl.CommandLineOptions options = new Bpl.CommandLineOptions();
Bpl.CommandLineOptions.Install(options);
Bpl.CommandLineOptions.Clo.DoModSetAnalysis = true;
Bpl.Program program;
string _bplFileName = "_" + bplFileName;
Bpl.Parser.Parse(_bplFileName, new List<string>(), out program);
int errorCount = program.Resolve();
if (errorCount != 0) {
Console.WriteLine("{0} name resolution errors detected in {1}", errorCount, _bplFileName);
return -1;
}
errorCount = program.Typecheck();
if (errorCount != 0) {
Console.WriteLine("{0} type checking errors detected in {1}", errorCount, _bplFileName);
return -1;
}
bool inline = false;
foreach (var d in program.TopLevelDeclarations) {
if (d.FindExprAttribute("inline") != null) {
inline = true;
}
}
if (inline) {
foreach (var d in program.TopLevelDeclarations) {
var impl = d as Bpl.Implementation;
if (impl != null) {
impl.OriginalBlocks = impl.Blocks;
impl.OriginalLocVars = impl.LocVars;
}
}
foreach (var d in program.TopLevelDeclarations) {
var impl = d as Bpl.Implementation;
if (impl != null && !impl.SkipVerification) {
Bpl.Inliner.ProcessImplementation(program, impl);
}
}
foreach (var d in program.TopLevelDeclarations) {
var impl = d as Bpl.Implementation;
if (impl != null) {
impl.OriginalBlocks = null;
impl.OriginalLocVars = null;
}
}
}
Microsoft.Boogie.TokenTextWriter writer = new Microsoft.Boogie.TokenTextWriter(bplFileName);
options.PrintInstrumented = true;
program.Emit(writer);
writer.Close();
return 0;
}
public static int TranslateAssemblyAndWriteOutput(List<string> assemblyNames, HeapFactory heapFactory, Options options, List<Regex> exemptionList, bool whiteList) {
Contract.Requires(assemblyNames != null);
Contract.Requires(heapFactory != null);
try {
var pgm = TranslateAssembly(assemblyNames, heapFactory, options, exemptionList, whiteList);
var fileName = assemblyNames[0];
fileName = Path.GetFileNameWithoutExtension(fileName);
string outputFileName = fileName + ".bpl";
using (var writer = new Microsoft.Boogie.TokenTextWriter(outputFileName)) {
Prelude.Emit(writer);
pgm.Emit(writer);
writer.Close();
}
return 0; // success
} catch (Exception e) { // swallow everything and just return an error code
Console.WriteLine("The byte-code translator failed: {0}", e.Message);
// Console.WriteLine("Stack trace: {0}", e.StackTrace);
return -1;
}
}
public static Bpl.Program/*?*/ TranslateAssembly(List<string> assemblyNames, HeapFactory heapFactory, Options options, List<Regex> exemptionList, bool whiteList) {
Contract.Requires(assemblyNames != null);
Contract.Requires(heapFactory != null);
var libPaths = options.libpaths;
var wholeProgram = options.wholeProgram;
var/*?*/ stubAssemblies = options.stub;
var phoneControlsConfigFile = options.phoneControls;
var doPhoneNav = options.phoneNavigationCode;
var doPhoneFeedback = options.phoneFeedbackCode;
var host = new CodeContractAwareHostEnvironment(libPaths != null ? libPaths : Enumerable<string>.Empty, true, true);
Host = host;
Bpl.CommandLineOptions.Install(new Bpl.CommandLineOptions());
#region Assemlies to translate (via cmd line)
modules = new List<IModule>();
var contractExtractors = new Dictionary<IUnit, IContractProvider>();
var pdbReaders = new Dictionary<IUnit, PdbReader>();
#region Load *all* of the assemblies before doing anything else so that they can all vote on unification matters
foreach (var a in assemblyNames) {
var module = host.LoadUnitFrom(a) as IModule;
if (module == null || module == Dummy.Module || module == Dummy.Assembly) {
Console.WriteLine(a + " is not a PE file containing a CLR module or assembly, or an error occurred when loading it.");
Console.WriteLine("Skipping it, continuing with other input assemblies");
}
modules.Add(module);
}
#endregion
#region Decompile all of the assemblies
var decompiledModules = new List<IModule>();
foreach (var m in modules) {
PdbReader/*?*/ pdbReader = null;
string pdbFile = Path.ChangeExtension(m.Location, "pdb");
if (File.Exists(pdbFile)) {
Stream pdbStream = File.OpenRead(pdbFile);
pdbReader = new PdbReader(pdbStream, host);
}
var m2 = Decompiler.GetCodeModelFromMetadataModel(host, m, pdbReader) as IModule;
// The decompiler does not turn calls to Assert/Assume into Code Model nodes
m2 = new Microsoft.Cci.MutableContracts.ContractExtractor.AssertAssumeExtractor(host, pdbReader).Rewrite(m2);
decompiledModules.Add(m2);
host.RegisterAsLatest(m2);
contractExtractors.Add(m2, host.GetContractExtractor(m2.UnitIdentity));
pdbReaders.Add(m2, pdbReader);
}
modules = decompiledModules;
#endregion
#endregion
#region Assemblies to translate (stubs)
if (stubAssemblies != null) {
foreach (var s in stubAssemblies) {
var module = host.LoadUnitFrom(s) as IModule;
if (module == null || module == Dummy.Module || module == Dummy.Assembly) {
Console.WriteLine(s + " is not a PE file containing a CLR module or assembly, or an error occurred when loading it.");
Console.WriteLine("Skipping it, continuing with other input assemblies");
}
PdbReader/*?*/ pdbReader = null;
string pdbFile = Path.ChangeExtension(module.Location, "pdb");
if (File.Exists(pdbFile)) {
Stream pdbStream = File.OpenRead(pdbFile);
pdbReader = new PdbReader(pdbStream, host);
}
module = Decompiler.GetCodeModelFromMetadataModel(host, module, pdbReader) as IModule;
var copier = new CodeDeepCopier(host);
var mutableModule = copier.Copy(module);
var mscorlib = TypeHelper.GetDefiningUnit(host.PlatformType.SystemObject.ResolvedType);
//var mutator = new ReparentModule(host, mscorlib, mutableModule);
//module = mutator.Rewrite(mutableModule);
//modules.Add(Tuple.Create(module, pdbReader));
RewriteUnitReferences renamer = new RewriteUnitReferences(host, mutableModule);
var mscorlibAssembly = (IAssembly)mscorlib;
renamer.targetAssembly = mscorlibAssembly;
renamer.originalAssemblyIdentity = mscorlibAssembly.AssemblyIdentity;
renamer.RewriteChildren(mutableModule);
modules.Add((IModule)mutableModule);
contractExtractors.Add(module, host.GetContractExtractor(module.UnitIdentity));
pdbReaders.Add(module, pdbReader);
}
}
#endregion
if (modules.Count == 0) {
throw new TranslationException("No input assemblies to translate.");
}
var primaryModule = modules[0];
Sink sink= new Sink(host, heapFactory, options, exemptionList, whiteList);
TranslationHelper.tmpVarCounter = 0;
// TODO move away, get all plugin and translators from a config file or alike
#region Plugged translators
List<Translator> translatorsPlugged = new List<Translator>();
ITranslationPlugin bctPlugin= new BytecodeTranslatorPlugin(wholeProgram);
Translator bcTranslator = bctPlugin.getTranslator(sink, contractExtractors, pdbReaders);
translatorsPlugged.Add(bcTranslator);
if (phoneControlsConfigFile != null && phoneControlsConfigFile != "") {
// TODO this should be part of the translator initialziation
PhoneCodeHelper.initialize(host);
PhoneCodeHelper.instance().PhonePlugin = new PhoneControlsPlugin(phoneControlsConfigFile);
if (doPhoneNav) {
// TODO this should be part of the translator initialziation
PhoneCodeHelper.instance().PhoneNavigationToggled = true;
ITranslationPlugin phoneInitPlugin = new PhoneInitializationPlugin();
ITranslationPlugin phoneNavPlugin = new PhoneNavigationPlugin();
Translator phInitTranslator = phoneInitPlugin.getTranslator(sink, contractExtractors, pdbReaders);
Translator phNavTranslator = phoneNavPlugin.getTranslator(sink, contractExtractors, pdbReaders);
translatorsPlugged.Add(phInitTranslator);
translatorsPlugged.Add(phNavTranslator);
}
if (doPhoneFeedback) {
// TODO this should be part of the translator initialziation
PhoneCodeHelper.instance().PhoneFeedbackToggled = true;
ITranslationPlugin phoneFeedbackPlugin = new PhoneFeedbackPlugin();
Translator phFeedbackTranslator = phoneFeedbackPlugin.getTranslator(sink, contractExtractors, pdbReaders);
translatorsPlugged.Add(phFeedbackTranslator);
}
}
#endregion
sink.TranslationPlugins = translatorsPlugged;
/*
if (phoneControlsConfigFile != null && phoneControlsConfigFile != "") {
// TODO send this all way to initialization of phone plugin translator
PhoneCodeHelper.initialize(host);
PhoneCodeHelper.instance().PhonePlugin = new PhoneControlsPlugin(phoneControlsConfigFile);
// TODO these parameters will eventually form part of plugin configuration
if (doPhoneNav) {
PhoneCodeHelper.instance().PhoneNavigationToggled = true;
PhoneInitializationMetadataTraverser initTr = new PhoneInitializationMetadataTraverser(host);
initTr.InjectPhoneCodeAssemblies(modules);
PhoneNavigationMetadataTraverser navTr = new PhoneNavigationMetadataTraverser(host);
navTr.InjectPhoneCodeAssemblies(modules);
}
if (doPhoneFeedback) {
PhoneCodeHelper.instance().PhoneFeedbackToggled = true;
PhoneControlFeedbackMetadataTraverser fbMetaDataTraverser= new PhoneControlFeedbackMetadataTraverser(host);
fbMetaDataTraverser.Visit(modules);
}
}
*/
// TODO replace the whole translation by a translator initialization and an orchestrator calling back for each element
// TODO for the current BC translator it will possibly just implement onMetadataElement(IModule)
// TODO refactor this away, handle priorities between plugged translators
IOrderedEnumerable<Translator> prioritizedTranslators = translatorsPlugged.OrderBy(t => t.getPriority());
foreach (Translator t in prioritizedTranslators) {
t.initialize();
if (t.isOneShot())
t.TranslateAssemblies(modules);
}
foreach (var pair in sink.delegateTypeToDelegates.Values) {
CreateDispatchMethod(sink, pair.Item1, pair.Item2);
}
string outputFileName = primaryModule.Name + ".bpl";
callPostTranslationTraversers(modules, sink, phoneControlsConfigFile, outputFileName);
if (PhoneCodeHelper.instance().PhoneNavigationToggled) {
finalizeNavigationAnalysisAndBoogieCode(phoneControlsConfigFile, sink, outputFileName);
}
//sink.CreateIdentifierCorrespondenceTable(primaryModule.Name.Value);
//var rc = new Bpl.ResolutionContext((Bpl.IErrorSink)null);
//foreach (var decl in sink.TranslatedProgram.TopLevelDeclarations) {
// decl.Register(rc);
//}
//sink.TranslatedProgram.Resolve(rc);
//var goodDecls = new List<Bpl.Declaration>();
//var tc = new Bpl.TypecheckingContext(null);
//foreach (var decl in sink.TranslatedProgram.TopLevelDeclarations) {
// var impl = decl as Bpl.Implementation;
// if (impl == null) {
// goodDecls.Add(decl);
// continue;
// }
// try {
// //var tc = new Bpl.TypecheckingContext(null);
// impl.Typecheck(tc);
// goodDecls.Add(impl);
// } catch {
// Console.WriteLine("Deleting implementation for: " + impl.Name);
// // nothing to do, just continue
// }
//}
//sink.TranslatedProgram.TopLevelDeclarations = goodDecls;
return sink.TranslatedProgram;
}
private static void finalizeNavigationAnalysisAndBoogieCode(string phoneControlsConfigFile, Sink sink, string outputFileName) {
outputBoogieTrackedControlConfiguration(phoneControlsConfigFile);
checkTransitivelyCalledBackKeyNavigations(modules);
createPhoneBoogieCallStubs(sink);
PhoneCodeHelper.instance().createQueriesBatchFile(sink, outputFileName);
outputBackKeyWarnings();
}
private static void callPostTranslationTraversers(List<IModule> modules, Sink sink, string phoneControlsConfigFile, string outputFileName) {
if (PhoneCodeHelper.instance().PhoneFeedbackToggled) {
PhoneCodeHelper.instance().CreateFeedbackCallingMethods(sink);
}
if (PhoneCodeHelper.instance().PhoneFeedbackToggled || PhoneCodeHelper.instance().PhoneNavigationToggled) {
PhoneMethodInliningMetadataTraverser inlineTraverser =
new PhoneMethodInliningMetadataTraverser(PhoneCodeHelper.instance());
inlineTraverser.findAllMethodsToInline(modules);
PhoneCodeHelper.updateInlinedMethods(sink, inlineTraverser.getMethodsToInline());
System.Console.WriteLine("Total methods seen: {0}, inlined: {1}", inlineTraverser.TotalMethodsCount, inlineTraverser.InlinedMethodsCount);
PhoneBackKeyCallbackTraverser traverser = new PhoneBackKeyCallbackTraverser(sink.host);
traverser.Traverse(modules);
}
}
private static void outputBoogieTrackedControlConfiguration(string phoneControlsConfigFile) {
string outputConfigFile = Path.ChangeExtension(phoneControlsConfigFile, "bplout");
StreamWriter outputStream = new StreamWriter(outputConfigFile);
PhoneCodeHelper.instance().PhonePlugin.DumpControlStructure(outputStream);
outputStream.Close();
}
private static void outputBackKeyWarnings() {
// NAVIGATION TODO for now I console this out
if (!PhoneCodeHelper.instance().OnBackKeyPressOverriden) {
Console.Out.WriteLine("No back navigation issues, OnBackKeyPress is not overriden");
} else if (PhoneCodeHelper.instance().BackKeyHandlerOverridenByUnknownDelegate) {
Console.Out.WriteLine("Back navigation ISSUE: BackKeyPress is overriden by unidentified delegate and may perform illegal navigation");
Console.Out.WriteLine("Offending pages:");
foreach (ITypeReference type in PhoneCodeHelper.instance().BackKeyUnknownDelegateOffenders) {
Console.WriteLine("\t" + type.ToString());
}
} else if (!PhoneCodeHelper.instance().BackKeyPressHandlerCancels && !PhoneCodeHelper.instance().BackKeyPressNavigates) {
Console.Out.WriteLine("No back navigation issues, BackKeyPress overrides do not alter navigation");
} else {
if (PhoneCodeHelper.instance().BackKeyPressNavigates) {
Console.Out.WriteLine("Back navigation ISSUE: back key press may navigate to pages not in backstack! From pages:");
foreach (ITypeReference type in PhoneCodeHelper.instance().BackKeyNavigatingOffenders.Keys) {
ICollection<Tuple<IMethodReference, string>> targets = PhoneCodeHelper.instance().BackKeyNavigatingOffenders[type];
Console.WriteLine("\t" + type.ToString() + " may navigate to ");
foreach (Tuple<IMethodReference, string> target in targets) {
Console.WriteLine("\t\t" + target.Item2 + " via " +
(target.Item1.Name == Dummy.Name ? "anonymous delegate" : target.Item1.ContainingType.ToString() + "." + target.Item1.Name.Value));
}
}
}
if (PhoneCodeHelper.instance().BackKeyPressHandlerCancels) {
Console.Out.WriteLine("Back navigation ISSUE: back key press default behaviour may be cancelled! From pages:");
foreach (Tuple<ITypeReference, string> cancellation in PhoneCodeHelper.instance().BackKeyCancellingOffenders) {
Console.WriteLine("\t" + cancellation.Item1.ToString() + " via " + cancellation.Item2);
}
}
}
}
private static void createPhoneBoogieCallStubs(Sink sink) {
foreach (IMethodDefinition def in PhoneNavigationCodeTraverser.NavCallers) {
if (!PhoneCodeHelper.instance().isKnownBackKeyOverride(def))
PhoneCodeHelper.instance().addHandlerStubCaller(sink, def);
}
PhoneCodeHelper.instance().addNavigationUriHavocer(sink);
}
private static void checkTransitivelyCalledBackKeyNavigations(List<IModule> modules) {
foreach (IMethodReference navMethod in PhoneCodeHelper.instance().KnownBackKeyHandlers) {
// right now we traversed everything so we can see reachability
IEnumerable<IMethodDefinition> indirects = PhoneCodeHelper.instance().getIndirectNavigators(modules, navMethod);
if (indirects.Count() > 0) {
ICollection<Tuple<IMethodReference, string>> targets = null;
PhoneCodeHelper.instance().BackKeyNavigatingOffenders.TryGetValue(navMethod.ContainingType, out targets);
if (targets == null) {
targets = new HashSet<Tuple<IMethodReference, string>>();
}
string indirectTargeting = "<unknown indirect navigation> via (";
foreach (IMethodDefinition methDef in indirects) {
indirectTargeting += methDef.ContainingType.ToString() + "." + methDef.Name.Value + ", ";
}
indirectTargeting += ")";
targets.Add(Tuple.Create<IMethodReference, string>(navMethod, indirectTargeting));
PhoneCodeHelper.instance().BackKeyNavigatingOffenders[navMethod.ContainingType] = targets;
}
indirects = PhoneCodeHelper.instance().getIndirectCancellations(modules, navMethod);
if (indirects.Count() > 0) {
string indirectTargeting = "(";
foreach (IMethodDefinition methDef in indirects) {
indirectTargeting += methDef.ContainingType.ToString() + "." + methDef.Name.Value + ", ";
}
indirectTargeting += ")";
PhoneCodeHelper.instance().BackKeyCancellingOffenders.Add(Tuple.Create<ITypeReference, string>(navMethod.ContainingType, indirectTargeting));
}
}
}
private static string NameUpToFirstPeriod(string name) {
var i = name.IndexOf('.');
if (i == -1)
return name;
else
return name.Substring(0, i);
}
private class ReparentModule : CodeRewriter {
private IUnit targetUnit;
private IUnit sourceUnit;
public ReparentModule(IMetadataHost host, IUnit targetUnit, IUnit sourceUnit)
: base(host) {
this.targetUnit = targetUnit;
this.sourceUnit = sourceUnit;
}
public override void RewriteChildren(RootUnitNamespace rootUnitNamespace) {
if (rootUnitNamespace.Unit.UnitIdentity.Equals(this.sourceUnit.UnitIdentity))
rootUnitNamespace.Unit = this.targetUnit;
base.RewriteChildren(rootUnitNamespace);
}
}
private static Bpl.IfCmd BuildIfCmd(Bpl.Expr b, Bpl.Cmd cmd, Bpl.IfCmd ifCmd) {
Bpl.StmtListBuilder ifStmtBuilder;
ifStmtBuilder = new Bpl.StmtListBuilder();
ifStmtBuilder.Add(cmd);
return new Bpl.IfCmd(b.tok, b, ifStmtBuilder.Collect(b.tok), ifCmd, null);
}
private static Bpl.IfCmd BuildReturnCmd(Bpl.Expr b) {
Bpl.StmtListBuilder ifStmtBuilder = new Bpl.StmtListBuilder();
ifStmtBuilder.Add(new Bpl.ReturnCmd(b.tok));
return new Bpl.IfCmd(b.tok, b, ifStmtBuilder.Collect(b.tok), null, null);
}
private static void BuildAssignment(Sink sink, Bpl.StmtListBuilder stmtBuilder, List<Bpl.Variable> lvars, List<Bpl.Variable> rvars) {
for (int i = 0; i < lvars.Count; i++) {
Bpl.Variable lvar = lvars[i];
Bpl.Type ltype = lvar.TypedIdent.Type;
Bpl.Variable rvar = rvars[i];
Bpl.Type rtype = rvar.TypedIdent.Type;
Bpl.IdentifierExpr lexpr = Bpl.Expr.Ident(lvar);
Bpl.Expr rexpr = Bpl.Expr.Ident(rvar);
if (rtype == ltype) {
// do nothing
} else if (ltype == sink.Heap.UnionType) {
rexpr = sink.Heap.ToUnion(Bpl.Token.NoToken, rtype, rexpr);
}
else if (rtype == sink.Heap.UnionType) {
rexpr = sink.Heap.FromUnion(Bpl.Token.NoToken, ltype, rexpr);
}
else {
System.Diagnostics.Debug.Assert(false);
}
stmtBuilder.Add(TranslationHelper.BuildAssignCmd(lexpr, rexpr));
}
}
private static void GenerateInAndOutExprs(Bpl.Expr e, Bpl.VariableSeq invars, Bpl.VariableSeq outvars, out Bpl.ExprSeq inExprs, out Bpl.IdentifierExprSeq outExprs) {
inExprs = new Bpl.ExprSeq();
inExprs.Add(e);
for (int i = 1; i < invars.Length; i++) {
Bpl.Variable f = invars[i];
inExprs.Add(Bpl.Expr.Ident(f));
}
outExprs = new Bpl.IdentifierExprSeq();
foreach (Bpl.Formal f in outvars) {
outExprs.Add(Bpl.Expr.Ident(f));
}
}
private static void CreateDispatchMethod(Sink sink, ITypeDefinition type, HashSet<IMethodDefinition> delegates) {
Contract.Assert(type.IsDelegate);
IMethodDefinition invokeMethod = null;
foreach (IMethodDefinition m in type.Methods) {
if (m.Name.Value == "Invoke") {
invokeMethod = m;
break;
}
}
try {
IMethodDefinition unspecializedInvokeMethod = Sink.Unspecialize(invokeMethod).ResolvedMethod;
Bpl.Procedure invokeProcedure = (Bpl.Procedure) sink.FindOrCreateProcedure(unspecializedInvokeMethod).Decl;
invokeProcedure.AddAttribute("inline", Bpl.Expr.Literal(1));
var invars = invokeProcedure.InParams;
var outvars = invokeProcedure.OutParams;
Bpl.IToken token = invokeMethod.Token();
Bpl.Formal delegateVariable = new Bpl.Formal(token, new Bpl.TypedIdent(token, "delegate", sink.Heap.DelegateType), true);
Bpl.VariableSeq dispatchProcInvars = new Bpl.VariableSeq();
List<Bpl.Variable> dispatchProcInExprs = new List<Bpl.Variable>();
dispatchProcInvars.Add(delegateVariable);
for (int i = 1; i < invars.Length; i++) {
Bpl.Variable v = invars[i];
Bpl.Formal f = new Bpl.Formal(token, new Bpl.TypedIdent(token, v.Name, v.TypedIdent.Type), true);
dispatchProcInvars.Add(f);
dispatchProcInExprs.Add(f);
}
Bpl.VariableSeq dispatchProcOutvars = new Bpl.VariableSeq();
List<Bpl.Variable> dispatchProcOutExprs = new List<Bpl.Variable>();
foreach (Bpl.Variable v in outvars) {
Bpl.Formal f = new Bpl.Formal(token, new Bpl.TypedIdent(token, v.Name, v.TypedIdent.Type), false);
dispatchProcOutvars.Add(f);
dispatchProcOutExprs.Add(f);
}
Bpl.Procedure dispatchProcedure =
new Bpl.Procedure(token,
"DispatchOne." + invokeProcedure.Name,
new Bpl.TypeVariableSeq(),
dispatchProcInvars,
dispatchProcOutvars,
new Bpl.RequiresSeq(),
new Bpl.IdentifierExprSeq(),
new Bpl.EnsuresSeq());
dispatchProcedure.AddAttribute("inline", Bpl.Expr.Literal(1));
sink.TranslatedProgram.TopLevelDeclarations.Add(dispatchProcedure);
Bpl.LocalVariable method = new Bpl.LocalVariable(token, new Bpl.TypedIdent(token, "method", Bpl.Type.Int));
Bpl.LocalVariable receiver = new Bpl.LocalVariable(token, new Bpl.TypedIdent(token, "receiver", sink.Heap.RefType));
Bpl.LocalVariable typeParameter = new Bpl.LocalVariable(token, new Bpl.TypedIdent(token, "typeParameter", sink.Heap.TypeType));
Bpl.VariableSeq localVariables = new Bpl.VariableSeq();
localVariables.Add(method);
localVariables.Add(receiver);
localVariables.Add(typeParameter);
Bpl.IfCmd ifCmd = BuildIfCmd(Bpl.Expr.True, new Bpl.AssumeCmd(token, Bpl.Expr.False), null);
int localCounter = 0;
foreach (IMethodDefinition defn in delegates) {
Sink.ProcedureInfo delegateProcedureInfo = sink.FindOrCreateProcedure(defn);
Bpl.Procedure delegateProcedure = (Bpl.Procedure) delegateProcedureInfo.Decl;
Bpl.Formal thisVariable = delegateProcedureInfo.ThisVariable;
int numArguments = defn.ParameterCount;
List<Bpl.Variable> tempInputs = new List<Bpl.Variable>();
List<Bpl.Variable> tempOutputs = new List<Bpl.Variable>();
for (int i = 0; i < defn.ParameterCount; i++) {
Bpl.Variable v = delegateProcedure.InParams[(thisVariable == null ? 0 : 1) + i];
Bpl.LocalVariable localVariable = new Bpl.LocalVariable(Bpl.Token.NoToken,
new Bpl.TypedIdent(Bpl.Token.NoToken, "local" + localCounter++, v.TypedIdent.Type));
localVariables.Add(localVariable);
tempInputs.Add(localVariable);
}
for (int i = 0; i < delegateProcedure.OutParams.Length; i++) {
Bpl.Variable v = delegateProcedure.OutParams[i];
Bpl.LocalVariable localVariable = new Bpl.LocalVariable(Bpl.Token.NoToken,
new Bpl.TypedIdent(Bpl.Token.NoToken, "local" + localCounter++, v.TypedIdent.Type));
localVariables.Add(localVariable);
tempOutputs.Add(localVariable);
}
Bpl.ExprSeq ins = new Bpl.ExprSeq();
Bpl.IdentifierExprSeq outs = new Bpl.IdentifierExprSeq();
if (!defn.IsStatic)
ins.Add(Bpl.Expr.Ident(receiver));
for (int i = 0; i < tempInputs.Count; i++) {
ins.Add(Bpl.Expr.Ident(tempInputs[i]));
}
if (defn.IsGeneric) {
for (int i = 0; i < defn.GenericParameterCount; i++) {
ins.Add(new Bpl.NAryExpr(Bpl.Token.NoToken,
new Bpl.FunctionCall(sink.FindOrCreateTypeParameterFunction(i)),
new Bpl.ExprSeq(Bpl.Expr.Ident(typeParameter))));
}
}
if (defn.IsStatic) {
int numTypeParameters = Sink.ConsolidatedGenericParameterCount(defn.ContainingType);
for (int i = 0; i < numTypeParameters; i++) {
ins.Add(new Bpl.NAryExpr(Bpl.Token.NoToken,
new Bpl.FunctionCall(sink.FindOrCreateTypeParameterFunction(i)),
new Bpl.ExprSeq(Bpl.Expr.Ident(typeParameter))));
}
}
for (int i = 0; i < tempOutputs.Count; i++) {
outs.Add(Bpl.Expr.Ident(tempOutputs[i]));
}
Bpl.Constant c = sink.FindOrCreateDelegateMethodConstant(defn);
Bpl.Expr bexpr = Bpl.Expr.Binary(Bpl.BinaryOperator.Opcode.Eq, Bpl.Expr.Ident(method), Bpl.Expr.Ident(c));
Bpl.StmtListBuilder ifStmtBuilder = new Bpl.StmtListBuilder();
System.Diagnostics.Debug.Assert(tempInputs.Count == dispatchProcInExprs.Count);
if (tempInputs.Count > 0) {
BuildAssignment(sink, ifStmtBuilder, tempInputs, dispatchProcInExprs);
}
ifStmtBuilder.Add(EmitDummySourceContext());
ifStmtBuilder.Add(new Bpl.CallCmd(token, delegateProcedure.Name, ins, outs));
System.Diagnostics.Debug.Assert(tempOutputs.Count == dispatchProcOutExprs.Count);
if (tempOutputs.Count > 0) {
BuildAssignment(sink, ifStmtBuilder, dispatchProcOutExprs, tempOutputs);
}
ifCmd = new Bpl.IfCmd(bexpr.tok, bexpr, ifStmtBuilder.Collect(bexpr.tok), ifCmd, null);
}
Bpl.StmtListBuilder stmtBuilder = new Bpl.StmtListBuilder();
stmtBuilder.Add(TranslationHelper.BuildAssignCmd(Bpl.Expr.Ident(method),
sink.ReadMethod(Bpl.Expr.Ident(delegateVariable))));
stmtBuilder.Add(TranslationHelper.BuildAssignCmd(Bpl.Expr.Ident(receiver),
sink.ReadReceiver(Bpl.Expr.Ident(delegateVariable))));
stmtBuilder.Add(TranslationHelper.BuildAssignCmd(Bpl.Expr.Ident(typeParameter),
sink.ReadTypeParameters(Bpl.Expr.Ident(delegateVariable))));
stmtBuilder.Add(ifCmd);
Bpl.Implementation dispatchImpl =
new Bpl.Implementation(token,
dispatchProcedure.Name,
new Bpl.TypeVariableSeq(),
dispatchProcedure.InParams,
dispatchProcedure.OutParams,
localVariables,
stmtBuilder.Collect(token)
);
dispatchImpl.Proc = dispatchProcedure;
sink.TranslatedProgram.TopLevelDeclarations.Add(dispatchImpl);
Bpl.ExprSeq inExprs;
Bpl.IdentifierExprSeq outExprs;
Bpl.LocalVariable iter = new Bpl.LocalVariable(token, new Bpl.TypedIdent(token, "iter", sink.Heap.DelegateMultisetType));
Bpl.LocalVariable d = new Bpl.LocalVariable(token, new Bpl.TypedIdent(token, "d", sink.Heap.DelegateType));
Bpl.LocalVariable all = new Bpl.LocalVariable(token, new Bpl.TypedIdent(token, "all", sink.Heap.DelegateMultisetType));
Bpl.StmtListBuilder implStmtBuilder = new Bpl.StmtListBuilder();
implStmtBuilder.Add(new Bpl.AssumeCmd(Bpl.Token.NoToken, Bpl.Expr.Neq(Bpl.Expr.Ident(invars[0]), Bpl.Expr.Ident(sink.Heap.NullRef))));
GenerateInAndOutExprs(sink.ReadDelegate(Bpl.Expr.Ident(invars[0])), invars, outvars, out inExprs, out outExprs);
implStmtBuilder.Add(new Bpl.CallCmd(token, dispatchProcedure.Name, inExprs, outExprs));
implStmtBuilder.Add(TranslationHelper.BuildAssignCmd(Bpl.Expr.Ident(all), sink.ReadDelegateMultiset(Bpl.Expr.Ident(invars[0]))));
implStmtBuilder.Add(
TranslationHelper.BuildAssignCmd(
Bpl.Expr.Ident(iter),
new Bpl.NAryExpr(Bpl.Token.NoToken, new Bpl.FunctionCall(sink.Heap.MultisetSingleton), new Bpl.ExprSeq(sink.ReadDelegate(Bpl.Expr.Ident(invars[0]))))));
Bpl.StmtListBuilder whileStmtBuilder = new Bpl.StmtListBuilder();
whileStmtBuilder.Add(BuildReturnCmd(Bpl.Expr.Binary(Bpl.BinaryOperator.Opcode.Eq, Bpl.Expr.Ident(iter), Bpl.Expr.Ident(all))));
whileStmtBuilder.Add(new Bpl.AssumeCmd(Bpl.Token.NoToken, Bpl.Expr.Binary(Bpl.BinaryOperator.Opcode.Gt, Bpl.Expr.Select(new Bpl.NAryExpr(Bpl.Token.NoToken, new Bpl.FunctionCall(sink.Heap.MultisetMinus), new Bpl.ExprSeq(Bpl.Expr.Ident(all), Bpl.Expr.Ident(iter))), Bpl.Expr.Ident(d)), new Bpl.LiteralExpr(Bpl.Token.NoToken, Microsoft.Basetypes.BigNum.FromInt(0)))));
whileStmtBuilder.Add(EmitDummySourceContext());
GenerateInAndOutExprs(Bpl.Expr.Ident(d), invars, outvars, out inExprs, out outExprs);
whileStmtBuilder.Add(new Bpl.CallCmd(token, dispatchProcedure.Name, inExprs, outExprs));
whileStmtBuilder.Add(TranslationHelper.BuildAssignCmd(Bpl.Expr.Ident(iter), new Bpl.NAryExpr(Bpl.Token.NoToken, new Bpl.FunctionCall(sink.Heap.MultisetPlus), new Bpl.ExprSeq(Bpl.Expr.Ident(iter), new Bpl.NAryExpr(Bpl.Token.NoToken, new Bpl.FunctionCall(sink.Heap.MultisetSingleton), new Bpl.ExprSeq(Bpl.Expr.Ident(d)))))));
whileStmtBuilder.Add(new Bpl.HavocCmd(Bpl.Token.NoToken, new Bpl.IdentifierExprSeq(Bpl.Expr.Ident(d))));
Bpl.WhileCmd whileCmd = new Bpl.WhileCmd(token, Bpl.Expr.True, new List<Bpl.PredicateCmd>(), whileStmtBuilder.Collect(token));
implStmtBuilder.Add(whileCmd);
Bpl.Implementation impl =
new Bpl.Implementation(token,
invokeProcedure.Name,
new Bpl.TypeVariableSeq(),
invars,
outvars,
new Bpl.VariableSeq(iter, d, all),
implStmtBuilder.Collect(token)
);
impl.Proc = invokeProcedure;
sink.TranslatedProgram.TopLevelDeclarations.Add(impl);
} catch (TranslationException te) {
throw new NotImplementedException(te.ToString());
} catch {
throw;
} finally {
// Maybe this is a good place to add the procedure to the toplevel declarations
}
}
private static Bpl.AssertCmd EmitDummySourceContext() {
string fileName = "BCTAutoGenerated";
int lineNumber = 0;
var tok = Bpl.Token.NoToken;
var attrib = new Bpl.QKeyValue(tok, "sourceLine", new List<object> { Bpl.Expr.Literal((int)lineNumber) }, null);
attrib = new Bpl.QKeyValue(tok, "sourceFile", new List<object> { fileName }, attrib);
return new Bpl.AssertCmd(tok, Bpl.Expr.True, attrib);
}
private class RewriteUnitReferences : MetadataRewriter {
private UnitIdentity sourceUnitIdentity = null;
internal IAssembly/*?*/ targetAssembly = null;
internal AssemblyIdentity/*?*/ originalAssemblyIdentity = null;
Dictionary<uint, bool> internedKeys = new Dictionary<uint, bool>();
public RewriteUnitReferences(IMetadataHost host, Module sourceUnit)
: base(host) {
this.sourceUnitIdentity = sourceUnit.UnitIdentity;
}
public override IModuleReference Rewrite(IModuleReference moduleReference) {
if (this.sourceUnitIdentity.Equals(moduleReference.UnitIdentity)) {
return this.targetAssembly;
}
return base.Rewrite(moduleReference);
}
public override IAssemblyReference Rewrite(IAssemblyReference assemblyReference) {
if (this.sourceUnitIdentity.Equals(assemblyReference.UnitIdentity)) {
return this.targetAssembly;
}
return base.Rewrite(assemblyReference);
}
}
}
}
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