Bug 3932

Summary:	fcatch may not exit on some programs
Product:	frysk	Reporter:	Phil Muldoon <pmuldoon>
Component:	general	Assignee:	Mike Cvet <mcvet>
Status:	RESOLVED FIXED
Severity:	normal
Priority:	P2
Version:	unspecified
Target Milestone:	---
Host:		Target:
Build:		Last reconfirmed:
Bug Depends on:
Bug Blocks:	3361
Attachments:	The rather evil little segfaulter, added as an attachment.

Description Phil Muldoon 2007-01-29 18:10:38 UTC

[pmuldoon@localhost bindir]$ gcc -g  ~/segfault.c -o ~/segfault -lpthread
[pmuldoon@localhost bindir]$ fcatch ~/segfault
Print Entry Thread 1
 
Print Entry Thread 2
 
SIGSEGV detected: dumping stack trace
#0 0x804851f in main () from: /home/pmuldoon/segfault.c#36
#1 0x4da7ff2c in __libc_start_main ()
#2 0x8048411 in _start ()

fcatch does not exit, but seems to sit waiting hanging at the console.

System is Fedora Core 6

[pmuldoon@localhost frysk_bin]$ uname -a
Linux localhost.localdomain 2.6.19-1.2895.fc6 #1 SMP Wed Jan 10 19:28:18 EST
2007 i686 i686 i386 GNU/Linux

Comment 1 Phil Muldoon 2007-01-29 18:11:23 UTC

Created attachment 1524 [details]
The rather evil little segfaulter, added as an attachment.

Comment 2 Mike Cvet 2007-02-23 15:09:03 UTC

2007-02-23  Mike Cvet  <mcvet@redhat.com>

	* FCatch.java (Blocker): Added. TaskObserver.Instruction blocking
	observer class.
	(signalObserver): Added. Add the same SignalObserver to each of the
	Tasks.
	(generateStackTrace): Decrement the numTasks counter.
	(removeObservers): Removed.
	(handleTaskBlock): Added. Switches on the signal value to appropriate 
	update the stack trace StringBuffer. If all the tasks of the process 
	have passed through, prints the StringBuffer and unblocks all the tasks.
	Fixes #3932.
	(CatchObserver.updateAttached): Initialize the global SignalObserver if 
	it is null, and add to each task that passes through.
	(CatchObserver.updateTerminating): Removed eventloop stopping code.
	(CatchObserver.updateTerminated): Requests a stop from the eventloop if 
	all the Tasks have completed stack tracing and are unblocked and
	terminated. Fixes #3932.
	(SignalObserver.updateSignaled): Assign some global variables from the 
	signaled Task. Moved switch statement and stack trace calls to 
	handleTaskBlock(). Block each of the threads of the process with an
	InstructionObserver. Fixes #4092.