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XArch: Trim the code block to match the actual code length #61523

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Merged
merged 6 commits into from
Nov 16, 2021
Merged

XArch: Trim the code block to match the actual code length #61523

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c4b770c
Trim the hot code size to the actual code length
kunalspathak Nov 12, 2021
9825f88
Remove allocatedHotCodeSize field
kunalspathak Nov 12, 2021
d17ee5f
Remove verbose logging
kunalspathak Nov 12, 2021
0fe283c
Perform trimming only for xarch
kunalspathak Nov 12, 2021
83bf82f
Include more comment about armarch
kunalspathak Nov 12, 2021
5effeea
Fix the condition for arm64
kunalspathak Nov 12, 2021
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19 changes: 19 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 @@ -366,6 +366,25 @@ private void CompileMethodInternal(IMethodNode methodCodeNodeNeedingCode, Method
#endif
}

if (codeSize < _code.Length)
{
if (_compilation.TypeSystemContext.Target.Architecture == TargetArchitecture.X64 ||
_compilation.TypeSystemContext.Target.Architecture == TargetArchitecture.X86)
{
// For xarch, the generated code is sometimes smaller than the memory allocated.
// In that case, trim the codeBlock to the actual value.
//
// For armarch, the allocation request of `hotCodeSize` also includes the roData size
// while the `codeSize` returned just contains the size of the native code. As such,
// there is guarantee that for armarch, (codeSize == _code.Length) is always true.
//
// Currently, hot/cold splitting is not done and hence `codeSize` just includes the size of
// hotCode. Once hot/cold splitting is done, need to trim respective `_code` or `_coldCode`
// accordingly.
Debug.Assert(codeSize != 0);
Array.Resize(ref _code, (int)codeSize);
}
}
PublishCode();
PublishROData();
}
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