Do not emit mangled names in mstat files (#75407)

There's a 16 MB limit on total number of bytes in the string heap of an ECMA-335 module.

S.R.Metadata throws an exception when the limit is reached. We can't even generate MSTAT files for an ASP.NET WebApi template.

MSTAT files are useful even without this information, but I would like to generate it in the future. Using some different approach.

Co-authored-by: Michal Strehovský <[email protected]>

Author: github-actions[bot]

src/coreclr/tools/aot/ILCompiler.Compiler/Compiler/MstatObjectDumper.cs

@@ -21,7 +21,7 @@ namespace ILCompiler
     public class MstatObjectDumper : ObjectDumper
     {
         private const int VersionMajor = 1;
-        private const int VersionMinor = 0;
+        private const int VersionMinor = 1;
 
         private readonly string _fileName;
         private readonly TypeSystemMetadataEmitter _emitter;
@@ -82,7 +82,8 @@ private void SerializeSimpleEntry(InstructionEncoder encoder, TypeSystemEntity e
         {
             encoder.OpCode(ILOpCode.Ldtoken);
             encoder.Token(_emitter.EmitMetadataHandleForTypeSystemEntity(entity));
-            encoder.LoadString(_emitter.GetUserStringHandle(mangledName));
+            // Would like to do this but mangled names are very long and go over the 16 MB string limit quickly.
+            // encoder.LoadString(_emitter.GetUserStringHandle(mangledName));
             encoder.LoadConstantI4(blob.Data.Length);
         }
 
@@ -93,7 +94,8 @@ internal override void End()
             {
                 methods.OpCode(ILOpCode.Ldtoken);
                 methods.Token(_emitter.EmitMetadataHandleForTypeSystemEntity(m.Key));
-                methods.LoadString(_emitter.GetUserStringHandle(m.Value.MangledName));
+                // Would like to do this but mangled names are very long and go over the 16 MB string limit quickly.
+                // methods.LoadString(_emitter.GetUserStringHandle(m.Value.MangledName));
                 methods.LoadConstantI4(m.Value.Size);
                 methods.LoadConstantI4(m.Value.GcInfoSize);
                 methods.LoadConstantI4(_methodEhInfo.GetValueOrDefault(m.Key));