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.net - 无法在 VS2019 中构建 CSCORE - 后期构建中的 ilasm 失败

问题描述

下列的

重定向到 .NET 4.7.2 后无法编译 CSCORE

和

使用 ilasm 失败，但没有给出原因

尝试在 VS2019 中构建 CSCore。最初 postbuild 脚本的路径与我的环境不兼容，所以我修复了它们。现在它有点工作，除了它在调用它的 InlineILCompiler 以在库中注入 CLR 代码时在 postbuild 脚本中中断。

更准确地说，它在 InlineILCompiler\Program.cs 的大约第 350 行处中断，在它调用外部 ilasm.exe 以使用“disasm.il”作为输入重新组装所有内容的步骤中。

我设法在 disasm.il 被删除之前获得了它的副本，并且我尝试自己重新发出 ilasm 命令，使用的参数与 InlineILCompiler 提供的参数相同......但它失败了，如下所示：

[...looong output here]
Assembled method CSCore.Codecs.AIFF.AiffBinaryReader::ReadUInt32
Assembled method CSCore.Codecs.AIFF.AiffBinaryReader::ReadInt16
Assembled method CSCore.Codecs.AIFF.AiffBinaryReader::ReadUInt16
Assembled method CSCore.Codecs.AIFF.AiffBinaryReader::Skip
Assembled method CSCore.Codecs.AIFF.AiffBinaryReader::ReadBytes
D:\cscore-master\CSCore\Codecs\AIFF\AiffBinaryReader.cs(97) : error : syntax error at token '-' in:     IL_00ad:  ldc.r8     -nan(ind)

我对 IL 了解不多，但我仍然进行了调查，发现违规行似乎处于阻塞状态：

  .method private hidebysig instance float64 
          ConvertFromIeeeExtended(uint8[] bytes) cil managed
  {
    // Code size       275 (0x113)
.maxstack 8
    .locals init ([0] float64 f,
             [1] int32 expon,
             [2] uint64 hiMant,
             [3] uint64 loMant,
             [4] bool V_4,
             [5] bool V_5,
             [6] bool V_6,
             [7] float64 V_7)
    .line 75,75 : 9,10 ''
    IL_0000:  nop
    .line 80,80 : 13,66 ''
    IL_0001:  ldarg.1
    IL_0002:  ldc.i4.0
    IL_0003:  ldelem.u1
    IL_0004:  ldc.i4.s   127
    IL_0006:  and
    IL_0007:  ldc.i4.8
    IL_0008:  shl
    IL_0009:  ldarg.1
    IL_000a:  ldc.i4.1
    IL_000b:  ldelem.u1
    IL_000c:  ldc.i4     0xff
    IL_0011:  and
    IL_0012:  or
    IL_0013:  stloc.1
    .line 81,84 : 13,50 ''
    IL_0014:  ldarg.1
    IL_0015:  ldc.i4.2
    IL_0016:  ldelem.u1
    IL_0017:  ldc.i4     0xff
    IL_001c:  and
    IL_001d:  conv.i8
    IL_001e:  ldc.i4.s   24
    IL_0020:  shl
    IL_0021:  ldarg.1
    IL_0022:  ldc.i4.3
    IL_0023:  ldelem.u1
    IL_0024:  ldc.i4     0xff
    IL_0029:  and
    IL_002a:  conv.i8
    IL_002b:  ldc.i4.s   16
    IL_002d:  shl
    IL_002e:  or
    IL_002f:  ldarg.1
    IL_0030:  ldc.i4.4
    IL_0031:  ldelem.u1
    IL_0032:  ldc.i4     0xff
    IL_0037:  and
    IL_0038:  conv.i8
    IL_0039:  ldc.i4.8
    IL_003a:  shl
    IL_003b:  or
    IL_003c:  ldarg.1
    IL_003d:  ldc.i4.5
    IL_003e:  ldelem.u1
    IL_003f:  ldc.i4     0xff
    IL_0044:  and
    IL_0045:  conv.i8
    IL_0046:  or
    IL_0047:  stloc.2
    .line 85,88 : 13,50 ''
    IL_0048:  ldarg.1
    IL_0049:  ldc.i4.6
    IL_004a:  ldelem.u1
    IL_004b:  ldc.i4     0xff
    IL_0050:  and
    IL_0051:  conv.i8
    IL_0052:  ldc.i4.s   24
    IL_0054:  shl
    IL_0055:  ldarg.1
    IL_0056:  ldc.i4.7
    IL_0057:  ldelem.u1
    IL_0058:  ldc.i4     0xff
    IL_005d:  and
    IL_005e:  conv.i8
    IL_005f:  ldc.i4.s   16
    IL_0061:  shl
    IL_0062:  or
    IL_0063:  ldarg.1
    IL_0064:  ldc.i4.8
    IL_0065:  ldelem.u1
    IL_0066:  ldc.i4     0xff
    IL_006b:  and
    IL_006c:  conv.i8
    IL_006d:  ldc.i4.8
    IL_006e:  shl
    IL_006f:  or
    IL_0070:  ldarg.1
    IL_0071:  ldc.i4.s   9
    IL_0073:  ldelem.u1
    IL_0074:  ldc.i4     0xff
    IL_0079:  and
    IL_007a:  conv.i8
    IL_007b:  or
    IL_007c:  stloc.3
    .line 90,90 : 13,58 ''
    IL_007d:  ldloc.1
    IL_007e:  brtrue.s   IL_008a

    IL_0080:  ldloc.2
    IL_0081:  brtrue.s   IL_008a

    IL_0083:  ldloc.3
    IL_0084:  ldc.i4.0
    IL_0085:  conv.i8
    IL_0086:  ceq
    IL_0088:  br.s       IL_008b

    IL_008a:  ldc.i4.0
    IL_008b:  stloc.s    V_4
    .line 16707566,16707566 : 0,0 ''
    IL_008d:  ldloc.s    V_4
    IL_008f:  brfalse.s  IL_009d

    .line 91,91 : 17,23 ''
    IL_0091:  ldc.r8     0.0
    IL_009a:  stloc.0
    IL_009b:  br.s       IL_00ef

    .line 93,93 : 13,14 ''
    IL_009d:  nop
    .line 94,94 : 17,37 ''
    IL_009e:  ldloc.1
    IL_009f:  ldc.i4     0x7fff
    IL_00a4:  ceq
    IL_00a6:  stloc.s    V_5
    .line 16707566,16707566 : 0,0 ''
    IL_00a8:  ldloc.s    V_5
    IL_00aa:  brfalse.s  IL_00ba

    .line 95,95 : 17,18 ''
    IL_00ac:  nop
    .line 97,97 : 21,36 ''
    IL_00ad:  ldc.r8     -nan(ind)
    IL_00b6:  stloc.0
    .line 98,98 : 17,18 ''
    IL_00b7:  nop
    IL_00b8:  br.s       IL_00ee

    .line 100,100 : 17,18 ''
    IL_00ba:  nop
    .line 101,101 : 21,36 ''
    IL_00bb:  ldloc.1
    IL_00bc:  ldc.i4     0x3fff
    IL_00c1:  sub
    IL_00c2:  stloc.1
    .line 102,102 : 21,69 ''
    IL_00c3:  ldarg.0
    IL_00c4:  ldarg.0
    IL_00c5:  ldloc.2
    IL_00c6:  call       instance float64 CSCore.Codecs.AIFF.AiffBinaryReader::UnsignedToFloat(uint64)
    IL_00cb:  ldloc.1
    IL_00cc:  ldc.i4.s   31
    IL_00ce:  sub
    IL_00cf:  dup
    IL_00d0:  stloc.1
    IL_00d1:  call       instance float64 CSCore.Codecs.AIFF.AiffBinaryReader::ldexp(float64,
                                                                                     int32)
    IL_00d6:  stloc.0
    .line 103,103 : 21,70 ''
    IL_00d7:  ldloc.0
    IL_00d8:  ldarg.0
    IL_00d9:  ldarg.0
    IL_00da:  ldloc.3
    IL_00db:  call       instance float64 CSCore.Codecs.AIFF.AiffBinaryReader::UnsignedToFloat(uint64)
    IL_00e0:  ldloc.1
    IL_00e1:  ldc.i4.s   32
    IL_00e3:  sub
    IL_00e4:  dup
    IL_00e5:  stloc.1
    IL_00e6:  call       instance float64 CSCore.Codecs.AIFF.AiffBinaryReader::ldexp(float64,
                                                                                     int32)
    IL_00eb:  add
    IL_00ec:  stloc.0
    .line 104,104 : 17,18 ''
    IL_00ed:  nop
    .line 105,105 : 13,14 ''
    IL_00ee:  nop
    .line 107,107 : 13,43 ''
    IL_00ef:  ldarg.1
    IL_00f0:  ldc.i4.0
    IL_00f1:  ldelem.u1
    IL_00f2:  ldc.i4     0x80
    IL_00f7:  and
    IL_00f8:  ldc.i4     0x80
    IL_00fd:  ceq
    IL_00ff:  stloc.s    V_6
    .line 16707566,16707566 : 0,0 ''
    IL_0101:  ldloc.s    V_6
    IL_0103:  brfalse.s  IL_010b

    .line 108,108 : 17,27 ''
    IL_0105:  ldloc.0
    IL_0106:  neg
    IL_0107:  stloc.s    V_7
    IL_0109:  br.s       IL_0110

    .line 109,109 : 13,22 ''
    IL_010b:  ldloc.0
    IL_010c:  stloc.s    V_7
    IL_010e:  br.s       IL_0110

    .line 110,110 : 9,10 ''
    IL_0110:  ldloc.s    V_7
    IL_0112:  ret
  } // end of method AiffBinaryReader::ConvertFromIeeeExtended

更准确地说，带有 -nan(ind) 的行：

 .line 95,95 : 17,18 ''
    IL_00ac:  nop
    .line 97,97 : 21,36 ''
    IL_00ad:  ldc.r8     -nan(ind)
    IL_00b6:  stloc.0
    .line 98,98 : 17,18 ''
    IL_00b7:  nop
    IL_00b8:  br.s       IL_00ee

不知道现在该怎么办，有什么想法吗？谢谢你。

标签： .netcilcscoreilasm

解决方案

这是 Visual Studio 中的错误，已报告但未解决。为了克服它，我在 Codecs.AIFF 中更改了 AiffBinaryReader 的来源。

            if (expon == 0x7FFF)
            {
                /* Infinity or NaN */
                f = double.NaN;
            }

变成

            if (expon == 0x7FFF)
            {
                /* Infinity or NaN */
                f =   1000;                 
                f = f * 1000;
                f = f * 1000;
                f = f * 1000;
                f = f * 1000;
                f = f * 1000;
                f = f * 1000;
                f = f * 1000;
                f = f * 1000;
                f = f * 1000;
                f = f * 1000;
                f = f * 1000;
                f = f * 1000;
                f = f * 1000;
                f = f * 1000;
                f = f * 1000;
            }

不完全是 INFINITY 但肯定是一个很大的数字，足以让 CsCore 工作和 VS 编译它！成功。

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