Early exit from GetTransitions like in gcinfodecoder.cpp

tomeksowi · VSadov · commit 09e5eb9b9520 · 2025-02-14T13:08:20.000-08:00
diff --git a/src/coreclr/tools/aot/ILCompiler.Reflection.ReadyToRun/Amd64/GcInfo.cs b/src/coreclr/tools/aot/ILCompiler.Reflection.ReadyToRun/Amd64/GcInfo.cs
@@ -537,6 +537,9 @@ private Dictionary<int, List<BaseGcTransition>> GetTransitions(byte[] image, ref
                 }
             }
 
+            if (SlotTable.NumTracked == 0)
+                return new Dictionary<int, List<BaseGcTransition>>();
+
             int numChunks = (totalInterruptibleLength + _gcInfoTypes.NUM_NORM_CODE_OFFSETS_PER_CHUNK - 1) / _gcInfoTypes.NUM_NORM_CODE_OFFSETS_PER_CHUNK;
             int numBitsPerPointer = (int)NativeReader.DecodeVarLengthUnsigned(image, _gcInfoTypes.POINTER_SIZE_ENCBASE, ref bitOffset);
             if (numBitsPerPointer == 0)

Original file line number	Diff line number	Diff line change
`@@ -537,6 +537,9 @@ private Dictionary<int, List<BaseGcTransition>> GetTransitions(byte[] image, ref`
`537`	`537`	`}`
`538`	`538`	`}`
`539`	`539`
	`540`	`+ if (SlotTable.NumTracked == 0)`
	`541`	`+ return new Dictionary<int, List<BaseGcTransition>>();`
	`542`	`+`
`540`	`543`	`int numChunks = (totalInterruptibleLength + _gcInfoTypes.NUM_NORM_CODE_OFFSETS_PER_CHUNK - 1) / _gcInfoTypes.NUM_NORM_CODE_OFFSETS_PER_CHUNK;`
`541`	`544`	`int numBitsPerPointer = (int)NativeReader.DecodeVarLengthUnsigned(image, _gcInfoTypes.POINTER_SIZE_ENCBASE, ref bitOffset);`
`542`	`545`	`if (numBitsPerPointer == 0)`