Hello,
Could you review the fix for JDK 16, please?
bug: https://bugs.openjdk.java.net/browse/JDK-8232114
<https://bugs.openjdk.java.net/browse/JDK-8232114>
webrev: http://cr.openjdk.java.net/~dmarkov/8232114/webrev.00/
<http://cr.openjdk.java.net/~dmarkov/8232114/webrev.00/>
Problem description:
The root cause of the crash is the lack of synchronisation in imjpapi.dll. In
particular when IME messages are processed in the message loop and another
message triggered through a SendMessage() call, this clears the buffer context
so on further processing the message loop in IME context will point to invalid
memory buffer. Microsoft article devoted to this issue:
https://docs.microsoft.com/en-us/troubleshoot/windows/win32/ime-crash-processing-cross-thread-sent-message
<https://docs.microsoft.com/en-us/troubleshoot/windows/win32/ime-crash-processing-cross-thread-sent-message>
Fix:
Replace SendMessage() with PostMessage() for IME messages and implement event
based mechanism to notify the sender that the message processing is completed.
Testing:
mach5 client tests (jtreg headful, jck, etc.) are green.
Regards,
Dmitry
