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[release/5.0] Backport AVX context fix #66120 #66356

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Merged
carlossanlop merged 4 commits into from
Mar 15, 2022
Merged

[release/5.0] Backport AVX context fix #66120 #66356

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35932d9
Use CopyContext to restore saved context on X86 (#65490)
VSadov Feb 18, 2022
221ab5f
Do not copy XState other than AVX when redirecting for GC stress (#65…
VSadov Feb 25, 2022
0002740
null-check the redirect context before using. (#65910)
VSadov Mar 1, 2022
afa4ea0
EE Suspension on x86 should use RtlRestoreContext when available (#65…
VSadov Mar 2, 2022
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8 changes: 8 additions & 0 deletions src/coreclr/src/vm/threads.h
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Original file line number Diff line number Diff line change
Expand Up @@ -3343,6 +3343,14 @@ class Thread
static void __stdcall RedirectedHandledJITCaseForGCStress();
#endif // defined(HAVE_GCCOVER) && USE_REDIRECT_FOR_GCSTRESS

#ifdef TARGET_X86
// RtlRestoreContext is available on x86, but relatively recently.
// RestoreContextSimulated uses SEH machinery for a similar result on legacy OS-es.
// This function should not be used on new OS-es as the pattern is not
// guaranteed to continue working in the future.
static void RestoreContextSimulated(Thread* pThread, CONTEXT* pCtx, void* pFrame, DWORD dwLastError);
#endif

friend void CPFH_AdjustContextForThreadSuspensionRace(T_CONTEXT *pContext, Thread *pThread);
#endif // FEATURE_HIJACK && !TARGET_UNIX

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