ID Number: Q58647
2.20 2.30 2.35 3.00 3.10 3.11 3.12 3.50
OS/2
Summary:
Using protected mode CodeView (CVP) to debug a program that utilizes
OS/2's VioPopUp() functionality requires care in order to avoid a
system lock-up. Due to the nature of the VioPopUp() call, an attempt
to trace into a VioPopUp() call causes the machine to hang. The way to
work around this situation is to set a breakpoint outside of the
VioPopUp() call [after the VioEndPopUp()], and then do a go (F5) to
instruct CodeView to execute to the next breakpoint.
More Information:
The VioPopUp() call brings forward a temporary pop-up text screen
group that can be used to display text information without altering
the context of the foreground screen. When a VioPopUp() call is
executed, the current foreground screen group loses the keyboard focus
to the pop-up screen. Therefore, when you trace into a VioPopUp()
call, the pop-up text comes forward and CodeView, running in the
foreground, loses the keyboard focus and cannot execute a trace
instruction. At this time, CTRL+ESC or ALT+ESC will not change the
deadlock situation and the only alternative is to reboot.