RESOLVED FIXED301095
Implement IPC error string reporting in testing for IPC::Connection 
https://bugs.webkit.org/show_bug.cgi?id=301095
Summary Implement IPC error string reporting in testing for IPC::Connection
Jon Butler
Reported 2025-10-20 07:40:38 PDT
This patch implements the first part of the IPC error string reporting feature, covering both IDL validation and MESSAGE_CHECK failures for IPC::Connection. It introduces: - Error string tracking in the Decoder, and changes to the code generation to set this error string on validation failure - Error string tracking on the Connection, and changes to the MESSAGE_CHECK logic to set the error string on failure - An IPC Testing API method to check for an error string on a specific connection, and a layout test showing its usage and testing the implementation of this feature by calling a test message, IPCTester.CheckTestParameter A few design decisions: - Error messages are checked for directly by WebContent rather than sent back as an out-of-band message from the receiver. This allows WebContent to know when it can continue if there wasn't an error, rather than waiting for a message that may not be coming. - The feature is 100% behind the IPC_TESTING_API feature flag, and only enabled in testing configurations
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Radar WebKit Bug Importer
Comment 1 2025-10-20 07:40:53 PDT
<rdar://problem/163035367>
Jon Butler
Comment 2 2025-10-20 07:45:55 PDT
Pull request: https://github.com/WebKit/WebKit/pull/52656
EWS
Comment 3 2025-11-04 03:00:27 PST
Committed 302528@main (2837e1eaeb3d): <https://commits.webkit.org/302528@main> Reviewed commits have been landed. Closing PR #52656 and removing active labels.
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