Skip to content

Use CopyContext to restore saved context on X86 #65490

New issue

Have a question about this project? Sign up for a free GitHub account to open an issue and contact its maintainers and the community.

Sign up for GitHub

By clicking “Sign up for GitHub”, you agree to our terms of service and privacy statement. We’ll occasionally send you account related emails.

Already on GitHub? Sign in to your account

Merged
VSadov merged 3 commits into from
Feb 18, 2022
Merged

Use CopyContext to restore saved context on X86 #65490

Changes from all commits
Commits
Show all changes
3 commits
Select commit Hold shift + click to select a range
c6156f4
Use CopyContext to restore saved context on X86
VSadov Feb 17, 2022
0e124a3
PR feedback
VSadov Feb 18, 2022
bae2f45
more PR feedback
VSadov Feb 18, 2022
File filter

Filter by extension

Filter by extension
Conversations
Failed to load comments.
Loading
Jump to
Jump to file
Failed to load files.
Loading
Diff view
Diff view
11 changes: 10 additions & 1 deletion src/coreclr/vm/threadsuspend.cpp
View file
Open in desktop
Original file line number Diff line number Diff line change
Expand Up @@ -2509,6 +2509,7 @@ void RedirectedThreadFrame::ExceptionUnwind()
#ifndef TARGET_UNIX

#ifdef TARGET_X86

//****************************************************************************************
// This will check who caused the exception. If it was caused by the the redirect function,
// the reason is to resume the thread back at the point it was redirected in the first
Expand Down Expand Up @@ -2577,7 +2578,15 @@ int RedirectedHandledJITCaseExceptionFilter(
pFrame->Pop();

// Copy the saved context record into the EH context;
ReplaceExceptionContextRecord(pExcepPtrs->ContextRecord, pCtx);
// NB: cannot use ReplaceExceptionContextRecord here.
// these contexts may contain extended registers and may have different format
// for reasons such as alignment or context compaction
CONTEXT* pTarget = pExcepPtrs->ContextRecord;
if (!CopyContext(pTarget, pTarget->ContextFlags, pCtx))
{
STRESS_LOG1(LF_SYNC, LL_ERROR, "ERROR: Could not set context record, lastError = 0x%x\n", GetLastError());
EEPOLICY_HANDLE_FATAL_ERROR(COR_E_EXECUTIONENGINE);
}

DWORD espValue = pCtx->Esp;

Expand Down