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Report CORINFO_ASYNC_SAVE_CONTEXTS when needed #121613

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Merged
jkotas merged 1 commit into from
Nov 14, 2025
Merged

Report CORINFO_ASYNC_SAVE_CONTEXTS when needed #121613

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10 changes: 10 additions & 0 deletions src/coreclr/tools/Common/JitInterface/CorInfoImpl.cs
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Original file line number Diff line number Diff line change
Expand Up @@ -807,6 +807,16 @@ private bool Get_CORINFO_METHOD_INFO(MethodDesc method, MethodIL methodIL, CORIN
{
methodInfo->options |= CorInfoOptions.CORINFO_GENERICS_CTXT_FROM_METHODTABLE;
}

// Indicate this is an async method that requires save and restore
// of async contexts. Regular user implemented runtime async methods
// require this behavior, but thunks should be transparent and should not
// come with this behavior.
if (method.IsAsyncVariant() && method.IsAsync)
{
methodInfo->options |= CorInfoOptions.CORINFO_ASYNC_SAVE_CONTEXTS;
}

methodInfo->regionKind = CorInfoRegionKind.CORINFO_REGION_NONE;
Get_CORINFO_SIG_INFO(method, sig: &methodInfo->args, methodIL);
Get_CORINFO_SIG_INFO(methodIL.GetLocals(), &methodInfo->locals);
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1 change: 1 addition & 0 deletions src/coreclr/tools/Common/JitInterface/CorInfoTypes.cs
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Expand Up @@ -438,6 +438,7 @@ public enum CorInfoOptions
CORINFO_GENERICS_CTXT_FROM_METHODDESC |
CORINFO_GENERICS_CTXT_FROM_METHODTABLE),
CORINFO_GENERICS_CTXT_KEEP_ALIVE = 0x00000100, // Keep the generics context alive throughout the method even if there is no explicit use, and report its location to the CLR
CORINFO_ASYNC_SAVE_CONTEXTS = 0x00000200, // Runtime async method must save and restore contexts
}

// These are used to detect array methods as NamedIntrinsic in JIT importer,
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