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/ DotNET / DotNET / 8.0 / untmp / whidbey / REDBITS / ndp / clr / src / BCL / System / ThrowHelper.cs / 1 / ThrowHelper.cs
namespace System { // This file defines an internal class used to throw exceptions in BCL code. // The main purpose is to reduce code size. // // The old way to throw an exception generates quite a lot IL code and assembly code. // Following is an example: // C# source // throw new ArgumentNullException("key", Environment.GetResourceString("ArgumentNull_Key")); // IL code: // IL_0003: ldstr "key" // IL_0008: ldstr "ArgumentNull_Key" // IL_000d: call string System.Environment::GetResourceString(string) // IL_0012: newobj instance void System.ArgumentNullException::.ctor(string,string) // IL_0017: throw // which is 21bytes in IL. // // So we want to get rid of the ldstr and call to Environment.GetResource in IL. // In order to do that, I created two enums: ExceptionResource, ExceptionArgument to represent the // argument name and resource name in a small integer. The source code will be changed to // ThrowHelper.ThrowArgumentNullException(ExceptionArgument.key, ExceptionResource.ArgumentNull_Key); // // The IL code will be 7 bytes. // IL_0008: ldc.i4.4 // IL_0009: ldc.i4.4 // IL_000a: call void System.ThrowHelper::ThrowArgumentNullException(valuetype System.ExceptionArgument) // IL_000f: ldarg.0 // // This will also reduce the Jitted code size a lot. // // It is very important we do this for generic classes because we can easily generate the same code // multiple times for different instantiation. // //// Jit will generates the code to throw exception at the end of a method, thus we can reduce working // set if the user code will never throw an exception. However Jit doesn't know anything about the // methods in ThrowHelper, so it will not moves the instructions to the end. // This is not a problem for ngened code because we will probably move the code based on profile data(hopefully.) // // For jitted code, it doesn't make much difference. The only advantage of moving the code to the end is to // improve cache locality. This doesn't make much different on newer processor like P4. // using System.Runtime.CompilerServices; using System.Runtime.Serialization; internal static class ThrowHelper { [MethodImplAttribute(MethodImplOptions.NoInlining)] internal static void ThrowArgumentOutOfRangeException() { ThrowHelper.ThrowArgumentOutOfRangeException(ExceptionArgument.index, ExceptionResource.ArgumentOutOfRange_Index); } internal static void ThrowWrongKeyTypeArgumentException(object key, Type targetType) { throw new ArgumentException(Environment.GetResourceString("Arg_WrongType", key, targetType), "key"); } internal static void ThrowWrongValueTypeArgumentException(object value, Type targetType) { throw new ArgumentException(Environment.GetResourceString("Arg_WrongType", value, targetType), "value"); } internal static void ThrowKeyNotFoundException() { throw new System.Collections.Generic.KeyNotFoundException(); } internal static void ThrowArgumentException(ExceptionResource resource) { throw new ArgumentException(Environment.GetResourceString(GetResourceName(resource))); } internal static void ThrowArgumentException(ExceptionResource resource, ExceptionArgument argument) { throw new ArgumentException(Environment.GetResourceString(GetResourceName(resource)), GetArgumentName(argument)); } internal static void ThrowArgumentNullException(ExceptionArgument argument) { throw new ArgumentNullException(GetArgumentName(argument)); } internal static void ThrowArgumentOutOfRangeException(ExceptionArgument argument) { throw new ArgumentOutOfRangeException(GetArgumentName(argument)); } internal static void ThrowArgumentOutOfRangeException(ExceptionArgument argument, ExceptionResource resource) { throw new ArgumentOutOfRangeException(GetArgumentName(argument), Environment.GetResourceString(GetResourceName(resource))); } internal static void ThrowInvalidOperationException(ExceptionResource resource) { throw new InvalidOperationException(Environment.GetResourceString(GetResourceName(resource))); } internal static void ThrowSerializationException(ExceptionResource resource) { throw new SerializationException(Environment.GetResourceString(GetResourceName(resource))); } internal static void ThrowSecurityException(ExceptionResource resource) { throw new System.Security.SecurityException(Environment.GetResourceString(GetResourceName(resource))); } internal static void ThrowNotSupportedException(ExceptionResource resource) { throw new NotSupportedException(Environment.GetResourceString(GetResourceName(resource))); } internal static void ThrowUnauthorizedAccessException(ExceptionResource resource) { throw new UnauthorizedAccessException(Environment.GetResourceString(GetResourceName(resource))); } internal static void ThrowObjectDisposedException(string objectName, ExceptionResource resource) { throw new ObjectDisposedException(objectName, Environment.GetResourceString(GetResourceName(resource))); } // // This function will convert an ExceptionArgument enum value to the argument name string. // internal static string GetArgumentName(ExceptionArgument argument) { string argumentName = null; switch (argument) { case ExceptionArgument.array: argumentName = "array"; break; case ExceptionArgument.arrayIndex: argumentName = "arrayIndex"; break; case ExceptionArgument.capacity: argumentName = "capacity"; break; case ExceptionArgument.collection: argumentName = "collection"; break; case ExceptionArgument.list: argumentName = "list"; break; case ExceptionArgument.converter: argumentName = "converter"; break; case ExceptionArgument.count: argumentName = "count"; break; case ExceptionArgument.dictionary: argumentName = "dictionary"; break; case ExceptionArgument.dictionaryCreationThreshold: argumentName = "dictionaryCreationThreshold"; break; case ExceptionArgument.index: argumentName = "index"; break; case ExceptionArgument.info: argumentName = "info"; break; case ExceptionArgument.key: argumentName = "key"; break; case ExceptionArgument.match: argumentName = "match"; break; case ExceptionArgument.obj: argumentName = "obj"; break; case ExceptionArgument.queue: argumentName = "queue"; break; case ExceptionArgument.stack: argumentName = "stack"; break; case ExceptionArgument.startIndex: argumentName = "startIndex"; break; case ExceptionArgument.value: argumentName = "value"; break; case ExceptionArgument.name: argumentName = "name"; break; case ExceptionArgument.mode: argumentName = "mode"; break; default: BCLDebug.Assert(false, "The enum value is not defined, please checked ExceptionArgumentName Enum."); return string.Empty; } return argumentName; } // // This function will convert an ExceptionResource enum value to the resource string. // internal static string GetResourceName(ExceptionResource resource) { string resourceName = null; switch (resource) { case ExceptionResource.Argument_ImplementIComparable: resourceName = "Argument_ImplementIComparable"; break; case ExceptionResource.Argument_AddingDuplicate: resourceName = "Argument_AddingDuplicate"; break; case ExceptionResource.ArgumentOutOfRange_BiggerThanCollection: resourceName = "ArgumentOutOfRange_BiggerThanCollection"; break; case ExceptionResource.ArgumentOutOfRange_Count: resourceName = "ArgumentOutOfRange_Count"; break; case ExceptionResource.ArgumentOutOfRange_Index: resourceName = "ArgumentOutOfRange_Index"; break; case ExceptionResource.ArgumentOutOfRange_InvalidThreshold: resourceName = "ArgumentOutOfRange_InvalidThreshold"; break; case ExceptionResource.ArgumentOutOfRange_ListInsert: resourceName = "ArgumentOutOfRange_ListInsert"; break; case ExceptionResource.ArgumentOutOfRange_NeedNonNegNum: resourceName = "ArgumentOutOfRange_NeedNonNegNum"; break; case ExceptionResource.ArgumentOutOfRange_SmallCapacity: resourceName = "ArgumentOutOfRange_SmallCapacity"; break; case ExceptionResource.Arg_ArrayPlusOffTooSmall: resourceName = "Arg_ArrayPlusOffTooSmall"; break; case ExceptionResource.Arg_RankMultiDimNotSupported: resourceName = "Arg_RankMultiDimNotSupported"; break; case ExceptionResource.Arg_NonZeroLowerBound: resourceName = "Arg_NonZeroLowerBound"; break; case ExceptionResource.Argument_InvalidArrayType: resourceName = "Argument_InvalidArrayType"; break; case ExceptionResource.Argument_InvalidOffLen: resourceName = "Argument_InvalidOffLen"; break; case ExceptionResource.Argument_ItemNotExist: resourceName = "Argument_ItemNotExist"; break; case ExceptionResource.InvalidOperation_CannotRemoveFromStackOrQueue: resourceName = "InvalidOperation_CannotRemoveFromStackOrQueue"; break; case ExceptionResource.InvalidOperation_EmptyQueue: resourceName = "InvalidOperation_EmptyQueue"; break; case ExceptionResource.InvalidOperation_EnumOpCantHappen: resourceName = "InvalidOperation_EnumOpCantHappen"; break; case ExceptionResource.InvalidOperation_EnumFailedVersion: resourceName = "InvalidOperation_EnumFailedVersion"; break; case ExceptionResource.InvalidOperation_EmptyStack: resourceName = "InvalidOperation_EmptyStack"; break; case ExceptionResource.InvalidOperation_EnumNotStarted: resourceName = "InvalidOperation_EnumNotStarted"; break; case ExceptionResource.InvalidOperation_EnumEnded: resourceName = "InvalidOperation_EnumEnded"; break; case ExceptionResource.NotSupported_KeyCollectionSet: resourceName = "NotSupported_KeyCollectionSet"; break; case ExceptionResource.NotSupported_ReadOnlyCollection: resourceName = "NotSupported_ReadOnlyCollection"; break; case ExceptionResource.NotSupported_ValueCollectionSet: resourceName = "NotSupported_ValueCollectionSet"; break; case ExceptionResource.NotSupported_SortedListNestedWrite: resourceName = "NotSupported_SortedListNestedWrite"; break; case ExceptionResource.Serialization_InvalidOnDeser: resourceName = "Serialization_InvalidOnDeser"; break; case ExceptionResource.Serialization_MissingKeyValuePairs: resourceName = "Serialization_MissingKeyValuePairs"; break; case ExceptionResource.Serialization_NullKey: resourceName = "Serialization_NullKey"; break; case ExceptionResource.Argument_InvalidType: resourceName = "Argument_InvalidType"; break; case ExceptionResource.Argument_InvalidArgumentForComparison: resourceName = "Argument_InvalidArgumentForComparison"; break; case ExceptionResource.InvalidOperation_NoValue: resourceName = "InvalidOperation_NoValue"; break; case ExceptionResource.InvalidOperation_RegRemoveSubKey: resourceName = "InvalidOperation_RegRemoveSubKey"; break; case ExceptionResource.Arg_RegSubKeyAbsent: resourceName = "Arg_RegSubKeyAbsent"; break; case ExceptionResource.Arg_RegSubKeyValueAbsent: resourceName = "Arg_RegSubKeyValueAbsent"; break; case ExceptionResource.Arg_RegKeyDelHive: resourceName = "Arg_RegKeyDelHive"; break; case ExceptionResource.Security_RegistryPermission: resourceName = "Security_RegistryPermission"; break; case ExceptionResource.Arg_RegSetStrArrNull: resourceName = "Arg_RegSetStrArrNull"; break; case ExceptionResource.Arg_RegSetMismatchedKind: resourceName = "Arg_RegSetMismatchedKind"; break; case ExceptionResource.UnauthorizedAccess_RegistryNoWrite: resourceName = "UnauthorizedAccess_RegistryNoWrite"; break; case ExceptionResource.ObjectDisposed_RegKeyClosed: resourceName = "ObjectDisposed_RegKeyClosed"; break; case ExceptionResource.Arg_RegKeyStrLenBug: resourceName = "Arg_RegKeyStrLenBug"; break; case ExceptionResource.Argument_InvalidRegistryKeyPermissionCheck: resourceName = "Argument_InvalidRegistryKeyPermissionCheck"; break; case ExceptionResource.NotSupported_InComparableType: resourceName = "NotSupported_InComparableType"; break; default: BCLDebug.Assert( false, "The enum value is not defined, please checked ExceptionArgumentName Enum."); return string.Empty; } return resourceName; } } // // The convention for this enum is using the argument name as the enum name // internal enum ExceptionArgument { obj, dictionary, dictionaryCreationThreshold, array, info, key, collection, list, match, converter, queue, stack, capacity, index, startIndex, value, count, arrayIndex, name, mode, } // // The convention for this enum is using the resource name as the enum name // internal enum ExceptionResource { Argument_ImplementIComparable, Argument_InvalidType, Argument_InvalidArgumentForComparison, Argument_InvalidRegistryKeyPermissionCheck, ArgumentOutOfRange_NeedNonNegNum, Arg_ArrayPlusOffTooSmall, Arg_NonZeroLowerBound, Arg_RankMultiDimNotSupported, Arg_RegKeyDelHive, Arg_RegKeyStrLenBug, Arg_RegSetStrArrNull, Arg_RegSetMismatchedKind, Arg_RegSubKeyAbsent, Arg_RegSubKeyValueAbsent, Argument_AddingDuplicate, Serialization_InvalidOnDeser, Serialization_MissingKeyValuePairs, Serialization_NullKey, Argument_InvalidArrayType, NotSupported_KeyCollectionSet, NotSupported_ValueCollectionSet, ArgumentOutOfRange_SmallCapacity, ArgumentOutOfRange_Index, Argument_InvalidOffLen, Argument_ItemNotExist, ArgumentOutOfRange_Count, ArgumentOutOfRange_InvalidThreshold, ArgumentOutOfRange_ListInsert, NotSupported_ReadOnlyCollection, InvalidOperation_CannotRemoveFromStackOrQueue, InvalidOperation_EmptyQueue, InvalidOperation_EnumOpCantHappen, InvalidOperation_EnumFailedVersion, InvalidOperation_EmptyStack, ArgumentOutOfRange_BiggerThanCollection, InvalidOperation_EnumNotStarted, InvalidOperation_EnumEnded, NotSupported_SortedListNestedWrite, InvalidOperation_NoValue, InvalidOperation_RegRemoveSubKey, Security_RegistryPermission, UnauthorizedAccess_RegistryNoWrite, ObjectDisposed_RegKeyClosed, NotSupported_InComparableType } }
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