[haiku-bugs] Re: [Haiku] #9854: Debug button doesn't always work
- From: "anevilyak" <trac@xxxxxxxxxxxx>
- Date: Thu, 04 Jul 2013 00:59:22 -0000
#9854: Debug button doesn't always work
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Reporter: anevilyak | Owner: bonefish
Type: bug | Status: assigned
Priority: high | Milestone: R1
Component: System/Kernel | Version: R1/Development
Resolution: | Keywords:
Blocked By: | Blocking:
Has a Patch: 1 | Platform: All
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Comment (by anevilyak):
After some further investigation, what seems to happen is that the stop
flag on the thread gets trapped by the syscall it was blocked in being
interrupted, and consequently the userland debugger simply gets sent the
post syscall event alone. As such, unless we want to complicate the set of
debug flags stored on the kernel thread structures, it'd appear that the
simplest approach would be for Debugger to track that it has a stop
request pending, and if it does, then enter debug mode upon the next
syscall event it gets that causes the thread to stop.
A quick test seems to confirm that this works, as demonstrated in the
above patch. Is that approach acceptable, or should it be generalized to
other types of debug events as well?
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Ticket URL: <http://dev.haiku-os.org/ticket/9854#comment:4>
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