/// <summary>
/// Generates IL for the script.
/// </summary>
public void GenerateCode()
{
// Generate the abstract syntax tree if it hasn't already been generated.
if (this.AbstractSyntaxTree == null)
{
Parse();
Optimize();
}
// Initialize global code-gen information.
var optimizationInfo = new OptimizationInfo();
optimizationInfo.AbstractSyntaxTree = this.AbstractSyntaxTree;
optimizationInfo.StrictMode = this.StrictMode;
optimizationInfo.MethodOptimizationHints = this.MethodOptimizationHints;
optimizationInfo.FunctionName = this.GetStackName();
optimizationInfo.Source = this.Source;
// DynamicMethod requires full trust because of generator.LoadMethodPointer in the
// FunctionExpression class.
// Create a new dynamic method.
System.Reflection.Emit.DynamicMethod dynamicMethod = new System.Reflection.Emit.DynamicMethod(
GetMethodName(), // Name of the generated method.
typeof(object), // Return type of the generated method.
GetParameterTypes(), // Parameter types of the generated method.
typeof(MethodGenerator), // Owner type.
true); // Skip visibility checks.
#if USE_DYNAMIC_IL_INFO
ILGenerator generator = new DynamicILGenerator(dynamicMethod);
#else
ILGenerator generator = new ReflectionEmitILGenerator(dynamicMethod, emitDebugInfo: false);
#endif
ILGenerator loggingILGenerator = null;
if (this.Options.EnableILAnalysis)
{
// Replace the generator with one that logs.
generator = loggingILGenerator = new LoggingILGenerator(generator);
}
#if DEBUG
// Replace the generator with one that verifies correctness.
generator = new VerifyingILGenerator(generator);
#endif
// Initialization code will appear to come from line 1.
optimizationInfo.MarkSequencePoint(generator, new SourceCodeSpan(1, 1, 1, 1));
// Generate the IL.
GenerateCode(generator, optimizationInfo);
generator.Complete();
// Create a delegate from the method.
this.GeneratedMethod = new GeneratedMethod(dynamicMethod.CreateDelegate(GetDelegate()), optimizationInfo.NestedFunctions);
if (loggingILGenerator != null)
{
// Store the disassembled IL so it can be retrieved for analysis purposes.
this.GeneratedMethod.DisassembledIL = loggingILGenerator.ToString();
}
}
/// <summary>
/// Generates IL for the script.
/// </summary>
public void GenerateCode()
{
// Generate the abstract syntax tree if it hasn't already been generated.
if (this.AbstractSyntaxTree == null)
{
Parse();
Optimize();
}
// Initialize global code-gen information.
var optimizationInfo = new OptimizationInfo();
optimizationInfo.AbstractSyntaxTree = this.AbstractSyntaxTree;
optimizationInfo.StrictMode = this.StrictMode;
optimizationInfo.MethodOptimizationHints = this.MethodOptimizationHints;
optimizationInfo.FunctionName = this.GetStackName();
optimizationInfo.Source = this.Source;
ILGenerator generator, loggingILGenerator = null;
if (this.Options.EnableDebugging == false)
{
// DynamicMethod requires full trust because of generator.LoadMethodPointer in the
// FunctionExpression class.
// Create a new dynamic method.
System.Reflection.Emit.DynamicMethod dynamicMethod = new System.Reflection.Emit.DynamicMethod(
GetMethodName(), // Name of the generated method.
typeof(object), // Return type of the generated method.
GetParameterTypes(), // Parameter types of the generated method.
typeof(MethodGenerator), // Owner type.
true); // Skip visibility checks.
#if USE_DYNAMIC_IL_INFO
generator = new DynamicILGenerator(dynamicMethod);
#else
generator = new ReflectionEmitILGenerator(dynamicMethod, emitDebugInfo: false);
#endif
if (this.Options.EnableILAnalysis == true)
{
// Replace the generator with one that logs.
generator = loggingILGenerator = new LoggingILGenerator(generator);
}
#if DEBUG
// Replace the generator with one that verifies correctness.
generator = new VerifyingILGenerator(generator);
#endif
// Initialization code will appear to come from line 1.
optimizationInfo.MarkSequencePoint(generator, new SourceCodeSpan(1, 1, 1, 1));
// Generate the IL.
GenerateCode(generator, optimizationInfo);
generator.Complete();
// Create a delegate from the method.
this.GeneratedMethod = new GeneratedMethod(dynamicMethod.CreateDelegate(GetDelegate()), optimizationInfo.NestedFunctions);
}
else
{
#if ENABLE_DEBUGGING
// Debugging or low trust path.
ReflectionEmitModuleInfo reflectionEmitInfo;
System.Reflection.Emit.TypeBuilder typeBuilder;
lock (reflectionEmitInfoLock)
{
reflectionEmitInfo = ReflectionEmitInfo;
if (reflectionEmitInfo == null)
{
reflectionEmitInfo = new ReflectionEmitModuleInfo();
// Create a dynamic assembly and module.
reflectionEmitInfo.AssemblyBuilder = System.Threading.Thread.GetDomain().DefineDynamicAssembly(
new System.Reflection.AssemblyName("Jurassic Dynamic Assembly"), System.Reflection.Emit.AssemblyBuilderAccess.Run);
// Mark the assembly as debuggable. This must be done before the module is created.
var debuggableAttributeConstructor = typeof(System.Diagnostics.DebuggableAttribute).GetConstructor(
new Type[] { typeof(System.Diagnostics.DebuggableAttribute.DebuggingModes) });
reflectionEmitInfo.AssemblyBuilder.SetCustomAttribute(
new System.Reflection.Emit.CustomAttributeBuilder(debuggableAttributeConstructor,
new object[] {
System.Diagnostics.DebuggableAttribute.DebuggingModes.DisableOptimizations |
System.Diagnostics.DebuggableAttribute.DebuggingModes.Default
}));
// Create a dynamic module.
reflectionEmitInfo.ModuleBuilder = reflectionEmitInfo.AssemblyBuilder.DefineDynamicModule("Module", this.Options.EnableDebugging);
ReflectionEmitInfo = reflectionEmitInfo;
}
// Create a new type to hold our method.
typeBuilder = reflectionEmitInfo.ModuleBuilder.DefineType("JavaScriptClass" + reflectionEmitInfo.TypeCount.ToString(), System.Reflection.TypeAttributes.Public | System.Reflection.TypeAttributes.Class);
reflectionEmitInfo.TypeCount++;
}
// Create a method.
var methodBuilder = typeBuilder.DefineMethod(this.GetMethodName(),
System.Reflection.MethodAttributes.HideBySig | System.Reflection.MethodAttributes.Static | System.Reflection.MethodAttributes.Public,
typeof(object), GetParameterTypes());
// Generate the IL for the method.
generator = new ReflectionEmitILGenerator(methodBuilder, emitDebugInfo: true);
if (this.Options.EnableILAnalysis == true)
{
// Replace the generator with one that logs.
generator = loggingILGenerator = new LoggingILGenerator(generator);
}
#if DEBUG
// Replace the generator with one that verifies correctness.
generator = new VerifyingILGenerator(generator);
#endif
if (this.Source.Path != null && this.Options.EnableDebugging == true)
{
// Initialize the debugging information.
optimizationInfo.DebugDocument = reflectionEmitInfo.ModuleBuilder.DefineDocument(this.Source.Path, LanguageType, LanguageVendor, DocumentType);
var parameterNames = GetParameterNames();
for (var i = 0; i < parameterNames.Length; i++)
{
methodBuilder.DefineParameter(i + 1, System.Reflection.ParameterAttributes.In, parameterNames[i]);
}
}
optimizationInfo.MarkSequencePoint(generator, new SourceCodeSpan(1, 1, 1, 1));
GenerateCode(generator, optimizationInfo);
generator.Complete();
// Bake it.
var type = typeBuilder.CreateType();
var methodInfo = type.GetMethod(this.GetMethodName());
this.GeneratedMethod = new GeneratedMethod(Delegate.CreateDelegate(GetDelegate(), methodInfo), optimizationInfo.NestedFunctions);
#else
throw new NotImplementedException();
#endif // ENABLE_DEBUGGING
}
if (loggingILGenerator != null)
{
// Store the disassembled IL so it can be retrieved for analysis purposes.
this.GeneratedMethod.DisassembledIL = loggingILGenerator.ToString();
}
}