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240 lines
11 KiB
240 lines
11 KiB
// <file> |
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// <copyright see="prj:///doc/copyright.txt"/> |
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// <license see="prj:///doc/license.txt"/> |
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// <author name="Daniel Grunwald"/> |
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// <version>$Revision: 776 $</version> |
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// </file> |
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using System; |
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using System.Collections.Generic; |
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using System.Linq; |
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using Mono.Cecil.Cil; |
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namespace ICSharpCode.Decompiler |
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{ |
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/// <summary> |
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/// Additional info about opcodes. |
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/// </summary> |
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sealed class OpCodeInfo |
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{ |
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static readonly OpCodeInfo[] knownOpCodes = { |
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#region Base Instructions |
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new OpCodeInfo(OpCodes.Add) { CanThrow = false }, |
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new OpCodeInfo(OpCodes.Add_Ovf) { CanThrow = true }, |
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new OpCodeInfo(OpCodes.Add_Ovf_Un) { CanThrow = true }, |
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new OpCodeInfo(OpCodes.And) { CanThrow = false }, |
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new OpCodeInfo(OpCodes.Arglist) { CanThrow = false }, |
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new OpCodeInfo(OpCodes.Beq) { CanThrow = false }, |
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new OpCodeInfo(OpCodes.Bge) { CanThrow = false }, |
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new OpCodeInfo(OpCodes.Bge_Un) { CanThrow = false }, |
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new OpCodeInfo(OpCodes.Bgt) { CanThrow = false }, |
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new OpCodeInfo(OpCodes.Bgt_Un) { CanThrow = false }, |
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new OpCodeInfo(OpCodes.Ble) { CanThrow = false }, |
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new OpCodeInfo(OpCodes.Ble_Un) { CanThrow = false }, |
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new OpCodeInfo(OpCodes.Blt) { CanThrow = false }, |
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new OpCodeInfo(OpCodes.Blt_Un) { CanThrow = false }, |
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new OpCodeInfo(OpCodes.Bne_Un) { CanThrow = false }, |
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new OpCodeInfo(OpCodes.Br) { CanThrow = false }, |
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new OpCodeInfo(OpCodes.Break) { CanThrow = true }, |
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new OpCodeInfo(OpCodes.Brfalse) { CanThrow = false }, |
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new OpCodeInfo(OpCodes.Brtrue) { CanThrow = false }, |
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new OpCodeInfo(OpCodes.Call) { CanThrow = true }, |
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new OpCodeInfo(OpCodes.Calli) { CanThrow = true }, |
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new OpCodeInfo(OpCodes.Ceq) { CanThrow = false }, |
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new OpCodeInfo(OpCodes.Cgt) { CanThrow = false }, |
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new OpCodeInfo(OpCodes.Cgt_Un) { CanThrow = false }, |
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new OpCodeInfo(OpCodes.Ckfinite) { CanThrow = true }, |
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new OpCodeInfo(OpCodes.Clt) { CanThrow = false }, |
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new OpCodeInfo(OpCodes.Clt_Un) { CanThrow = false }, |
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// conv.<to type> |
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new OpCodeInfo(OpCodes.Conv_I1) { CanThrow = false }, |
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new OpCodeInfo(OpCodes.Conv_I2) { CanThrow = false }, |
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new OpCodeInfo(OpCodes.Conv_I4) { CanThrow = false }, |
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new OpCodeInfo(OpCodes.Conv_I8) { CanThrow = false }, |
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new OpCodeInfo(OpCodes.Conv_R4) { CanThrow = false }, |
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new OpCodeInfo(OpCodes.Conv_R8) { CanThrow = false }, |
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new OpCodeInfo(OpCodes.Conv_U1) { CanThrow = false }, |
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new OpCodeInfo(OpCodes.Conv_U2) { CanThrow = false }, |
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new OpCodeInfo(OpCodes.Conv_U4) { CanThrow = false }, |
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new OpCodeInfo(OpCodes.Conv_U8) { CanThrow = false }, |
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new OpCodeInfo(OpCodes.Conv_I) { CanThrow = false }, |
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new OpCodeInfo(OpCodes.Conv_U) { CanThrow = false }, |
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new OpCodeInfo(OpCodes.Conv_R_Un) { CanThrow = false }, |
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// conv.ovf.<to type> |
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new OpCodeInfo(OpCodes.Conv_Ovf_I1) { CanThrow = true}, |
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new OpCodeInfo(OpCodes.Conv_Ovf_I2) { CanThrow = true}, |
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new OpCodeInfo(OpCodes.Conv_Ovf_I4) { CanThrow = true}, |
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new OpCodeInfo(OpCodes.Conv_Ovf_I8) { CanThrow = true}, |
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new OpCodeInfo(OpCodes.Conv_Ovf_U1) { CanThrow = true}, |
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new OpCodeInfo(OpCodes.Conv_Ovf_U2) { CanThrow = true}, |
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new OpCodeInfo(OpCodes.Conv_Ovf_U4) { CanThrow = true}, |
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new OpCodeInfo(OpCodes.Conv_Ovf_U8) { CanThrow = true}, |
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new OpCodeInfo(OpCodes.Conv_Ovf_I) { CanThrow = true}, |
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new OpCodeInfo(OpCodes.Conv_Ovf_U) { CanThrow = true}, |
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// conv.ovf.<to type>.un |
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new OpCodeInfo(OpCodes.Conv_Ovf_I1_Un) { CanThrow = true }, |
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new OpCodeInfo(OpCodes.Conv_Ovf_I2_Un) { CanThrow = true }, |
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new OpCodeInfo(OpCodes.Conv_Ovf_I4_Un) { CanThrow = true }, |
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new OpCodeInfo(OpCodes.Conv_Ovf_I8_Un) { CanThrow = true }, |
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new OpCodeInfo(OpCodes.Conv_Ovf_U1_Un) { CanThrow = true }, |
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new OpCodeInfo(OpCodes.Conv_Ovf_U2_Un) { CanThrow = true }, |
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new OpCodeInfo(OpCodes.Conv_Ovf_U4_Un) { CanThrow = true }, |
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new OpCodeInfo(OpCodes.Conv_Ovf_U8_Un) { CanThrow = true }, |
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new OpCodeInfo(OpCodes.Conv_Ovf_I_Un) { CanThrow = true }, |
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new OpCodeInfo(OpCodes.Conv_Ovf_U_Un) { CanThrow = true }, |
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//new OpCodeInfo(OpCodes.Cpblk) { CanThrow = true }, - no idea whether this might cause trouble for the type system, C# shouldn't use it so I'll disable it |
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new OpCodeInfo(OpCodes.Div) { CanThrow = true }, |
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new OpCodeInfo(OpCodes.Div_Un) { CanThrow = true }, |
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new OpCodeInfo(OpCodes.Dup) { CanThrow = true, IsMoveInstruction = true }, |
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new OpCodeInfo(OpCodes.Endfilter) { CanThrow = false }, |
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new OpCodeInfo(OpCodes.Endfinally) { CanThrow = false }, |
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//new OpCodeInfo(OpCodes.Initblk) { CanThrow = true }, - no idea whether this might cause trouble for the type system, C# shouldn't use it so I'll disable it |
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//new OpCodeInfo(OpCodes.Jmp) { CanThrow = true } - We don't support non-local control transfers. |
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new OpCodeInfo(OpCodes.Ldarg) { CanThrow = false, IsMoveInstruction = true }, |
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new OpCodeInfo(OpCodes.Ldarga) { CanThrow = false }, |
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new OpCodeInfo(OpCodes.Ldc_I4) { CanThrow = false }, |
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new OpCodeInfo(OpCodes.Ldc_I8) { CanThrow = false }, |
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new OpCodeInfo(OpCodes.Ldc_R4) { CanThrow = false }, |
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new OpCodeInfo(OpCodes.Ldc_R8) { CanThrow = false }, |
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new OpCodeInfo(OpCodes.Ldftn) { CanThrow = false }, |
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// ldind.<type> |
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new OpCodeInfo(OpCodes.Ldind_I1) { CanThrow = true }, |
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new OpCodeInfo(OpCodes.Ldind_I2) { CanThrow = true }, |
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new OpCodeInfo(OpCodes.Ldind_I4) { CanThrow = true }, |
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new OpCodeInfo(OpCodes.Ldind_I8) { CanThrow = true }, |
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new OpCodeInfo(OpCodes.Ldind_U1) { CanThrow = true }, |
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new OpCodeInfo(OpCodes.Ldind_U2) { CanThrow = true }, |
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new OpCodeInfo(OpCodes.Ldind_U4) { CanThrow = true }, |
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new OpCodeInfo(OpCodes.Ldind_R4) { CanThrow = true }, |
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new OpCodeInfo(OpCodes.Ldind_R8) { CanThrow = true }, |
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new OpCodeInfo(OpCodes.Ldind_I) { CanThrow = true }, |
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new OpCodeInfo(OpCodes.Ldind_Ref) { CanThrow = true }, |
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// the ldloc exceptions described in the spec can only occur on methods without .localsinit - but csc always sets that flag |
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new OpCodeInfo(OpCodes.Ldloc) { CanThrow = false, IsMoveInstruction = true }, |
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new OpCodeInfo(OpCodes.Ldloca) { CanThrow = false }, |
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new OpCodeInfo(OpCodes.Ldnull) { CanThrow = false }, |
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new OpCodeInfo(OpCodes.Leave) { CanThrow = false }, |
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new OpCodeInfo(OpCodes.Localloc) { CanThrow = true }, |
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new OpCodeInfo(OpCodes.Mul) { CanThrow = false }, |
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new OpCodeInfo(OpCodes.Mul_Ovf) { CanThrow = true }, |
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new OpCodeInfo(OpCodes.Mul_Ovf_Un) { CanThrow = true }, |
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new OpCodeInfo(OpCodes.Neg) { CanThrow = false }, |
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new OpCodeInfo(OpCodes.Nop) { CanThrow = false }, |
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new OpCodeInfo(OpCodes.Not) { CanThrow = false }, |
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new OpCodeInfo(OpCodes.Or) { CanThrow = false }, |
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new OpCodeInfo(OpCodes.Pop) { CanThrow = false }, |
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new OpCodeInfo(OpCodes.Rem) { CanThrow = true }, |
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new OpCodeInfo(OpCodes.Rem_Un) { CanThrow = true }, |
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new OpCodeInfo(OpCodes.Ret) { CanThrow = false }, |
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new OpCodeInfo(OpCodes.Shl) { CanThrow = false }, |
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new OpCodeInfo(OpCodes.Shr) { CanThrow = false }, |
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new OpCodeInfo(OpCodes.Shr_Un) { CanThrow = false }, |
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new OpCodeInfo(OpCodes.Starg) { CanThrow = false, IsMoveInstruction = true }, |
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new OpCodeInfo(OpCodes.Stind_I1) { CanThrow = true }, |
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new OpCodeInfo(OpCodes.Stind_I2) { CanThrow = true }, |
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new OpCodeInfo(OpCodes.Stind_I4) { CanThrow = true }, |
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new OpCodeInfo(OpCodes.Stind_I8) { CanThrow = true }, |
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new OpCodeInfo(OpCodes.Stind_R4) { CanThrow = true }, |
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new OpCodeInfo(OpCodes.Stind_R8) { CanThrow = true }, |
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new OpCodeInfo(OpCodes.Stind_I) { CanThrow = true }, |
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new OpCodeInfo(OpCodes.Stind_Ref) { CanThrow = true }, |
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new OpCodeInfo(OpCodes.Stloc) { CanThrow = false, IsMoveInstruction = true }, |
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new OpCodeInfo(OpCodes.Sub) { CanThrow = false }, |
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new OpCodeInfo(OpCodes.Sub_Ovf) { CanThrow = true }, |
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new OpCodeInfo(OpCodes.Sub_Ovf_Un) { CanThrow = true }, |
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new OpCodeInfo(OpCodes.Switch) { CanThrow = false }, |
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new OpCodeInfo(OpCodes.Xor) { CanThrow = false }, |
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#endregion |
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#region Object model instructions |
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// CanThrow is true by default - most OO instructions can throw, so we don't specify CanThrow all of the time |
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new OpCodeInfo(OpCodes.Box), |
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new OpCodeInfo(OpCodes.Callvirt), |
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new OpCodeInfo(OpCodes.Castclass), // (output type not Input0 as type arguments may change) |
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new OpCodeInfo(OpCodes.Cpobj), |
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new OpCodeInfo(OpCodes.Initobj) { CanThrow = false }, |
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new OpCodeInfo(OpCodes.Isinst) { CanThrow = false }, |
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new OpCodeInfo(OpCodes.Ldelem_Any), |
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// ldelem.<type> |
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new OpCodeInfo(OpCodes.Ldelem_I) , |
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new OpCodeInfo(OpCodes.Ldelem_I1), |
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new OpCodeInfo(OpCodes.Ldelem_I2), |
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new OpCodeInfo(OpCodes.Ldelem_I4), |
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new OpCodeInfo(OpCodes.Ldelem_I8), |
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new OpCodeInfo(OpCodes.Ldelem_R4), |
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new OpCodeInfo(OpCodes.Ldelem_R8), |
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new OpCodeInfo(OpCodes.Ldelem_Ref), |
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new OpCodeInfo(OpCodes.Ldelem_U1), |
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new OpCodeInfo(OpCodes.Ldelem_U2), |
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new OpCodeInfo(OpCodes.Ldelem_U4), |
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new OpCodeInfo(OpCodes.Ldelema) , |
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new OpCodeInfo(OpCodes.Ldfld) , |
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new OpCodeInfo(OpCodes.Ldflda), |
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new OpCodeInfo(OpCodes.Ldlen) , |
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new OpCodeInfo(OpCodes.Ldobj) , |
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new OpCodeInfo(OpCodes.Ldsfld), |
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new OpCodeInfo(OpCodes.Ldsflda), |
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new OpCodeInfo(OpCodes.Ldstr) { CanThrow = false }, |
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new OpCodeInfo(OpCodes.Ldtoken) { CanThrow = false }, |
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new OpCodeInfo(OpCodes.Ldvirtftn), |
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//new OpCodeInfo(OpCodes.Mkrefany), don't enable this without checking what it is |
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new OpCodeInfo(OpCodes.Newarr), |
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new OpCodeInfo(OpCodes.Newobj), |
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//new OpCodeInfo(OpCodes.Mkrefany), don't enable this without checking what it is |
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//new OpCodeInfo(OpCodes.Refanyval), don't enable this without checking what it is |
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new OpCodeInfo(OpCodes.Rethrow), |
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new OpCodeInfo(OpCodes.Sizeof) { CanThrow = false }, |
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new OpCodeInfo(OpCodes.Stelem_Any), |
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new OpCodeInfo(OpCodes.Stelem_I1), |
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new OpCodeInfo(OpCodes.Stelem_I2), |
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new OpCodeInfo(OpCodes.Stelem_I4), |
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new OpCodeInfo(OpCodes.Stelem_I8), |
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new OpCodeInfo(OpCodes.Stelem_R4), |
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new OpCodeInfo(OpCodes.Stelem_R8), |
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new OpCodeInfo(OpCodes.Stelem_Ref), |
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new OpCodeInfo(OpCodes.Stfld), |
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new OpCodeInfo(OpCodes.Stobj), |
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new OpCodeInfo(OpCodes.Stsfld), |
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new OpCodeInfo(OpCodes.Throw), |
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new OpCodeInfo(OpCodes.Unbox), |
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new OpCodeInfo(OpCodes.Unbox_Any), |
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#endregion |
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}; |
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static readonly Dictionary<Code, OpCodeInfo> knownOpCodeDict = knownOpCodes.ToDictionary(info => info.OpCode.Code); |
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public static OpCodeInfo Get(OpCode opCode) |
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{ |
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return Get(opCode.Code); |
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} |
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public static OpCodeInfo Get(Code code) |
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{ |
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OpCodeInfo info; |
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if (knownOpCodeDict.TryGetValue(code, out info)) |
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return info; |
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else |
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throw new NotSupportedException(code.ToString()); |
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} |
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OpCode opcode; |
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private OpCodeInfo(OpCode opcode) |
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{ |
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this.opcode = opcode; |
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this.CanThrow = true; |
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} |
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public OpCode OpCode { get { return opcode; } } |
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/// <summary> |
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/// 'Move' kind of instructions have one input (may be stack or local variable) and copy that value to all outputs (again stack or local variable). |
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/// </summary> |
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public bool IsMoveInstruction { get; private set; } |
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/// <summary> |
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/// Specifies whether this opcode is capable of throwing exceptions. |
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/// </summary> |
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public bool CanThrow { get; private set; } |
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} |
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}
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