Skip to content
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

Jump to bottom

Fix infinite recursion in TSF #18248

Merged
merged 3 commits into from
Nov 26, 2024
Merged

Fix infinite recursion in TSF #18248

Show file tree
Hide file tree
Changes from 1 commit
Commits
Show all changes
3 commits
Select commit Hold shift + click to select a range
8f6d146
Fix infinite recursion in TSF
lhecker Nov 25, 2024
38a4858
Merge remote-tracking branch 'origin/main' into dev/lhecker/tsf-recur…
lhecker Nov 26, 2024
5737563
Typo
lhecker Nov 26, 2024
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
16 changes: 14 additions & 2 deletions src/tsf/Implementation.cpp
View file
Open in desktop
Original file line number Diff line number Diff line change
Expand Up @@ -84,8 +84,20 @@ void Implementation::Uninitialize() noexcept
}
}

HWND Implementation::FindWindowOfActiveTSF() const noexcept
{
HWND Implementation::FindWindowOfActiveTSF() noexcept
{
// We don't know what ITfContextOwner we're going to get in
// the code below and it may very well be us (this instance).
// It's also possible that our IDataProvider's GetHwnd()
// implementation calls this FindWindowOfActiveTSF() function.
// This can then in infinite recursion because we're calling
// GetWnd() below, which may call GetHwnd(), which may call
// FindWindowOfActiveTSF(), and so on.
// By temporarily clearing the _provider we fix that flaw.
Copy link
Member

Choose a reason for hiding this comment

The reason will be displayed to describe this comment to others. Learn more.

Where is the determination to bail out made based on _provider?

Copy link
Member Author

Choose a reason for hiding this comment

The reason will be displayed to describe this comment to others. Learn more.

Throughout the file. All places that use _provider are already doing a null check.

const auto restore = wil::scope_exit([this, provider = std::move(_provider)]() mutable {
_provider = std::move(provider);
});

wil::com_ptr<IEnumTfDocumentMgrs> enumDocumentMgrs;
if (FAILED_LOG(_threadMgrEx->EnumDocumentMgrs(enumDocumentMgrs.addressof())))
{
Expand Down
2 changes: 1 addition & 1 deletion src/tsf/Implementation.h
View file
Open in desktop
Original file line number Diff line number Diff line change
Expand Up @@ -22,7 +22,7 @@ namespace Microsoft::Console::TSF

void Initialize();
void Uninitialize() noexcept;
HWND FindWindowOfActiveTSF() const noexcept;
HWND FindWindowOfActiveTSF() noexcept;
void AssociateFocus(IDataProvider* provider);
void Focus(IDataProvider* provider);
void Unfocus(IDataProvider* provider);
Expand Down
Loading