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Re: Daemon/launchd crashes with EXC_BREAKPOINT (SIGTRAP)


On Nov 20, 2007, at 12:24 AM, Elango C wrote:
I have created the Daemon which will sense the USB device arrival and removal during the system

startup / Login. The same application works fine in Mac OS Tiger (10.4) but the same application

is throwing errors in Mac OS Leopard and crashes.

[...] 
Exception Type:  EXC_BREAKPOINT (SIGTRAP)

Exception Codes: 0x0000000000000002, 0x0000000000000000

[...] 

Application Specific Information:

*** single-threaded process forked ***


Thread 0 Crashed:

0 com.apple.CoreFoundation 0x00b57119 CFRunLoopRunSpecific + 1833

1 com.apple.CoreFoundation 0x00b57d94 CFRunLoopRun + 84

2 Autopoll 0x00002cdb -[MyAutopoll registerDeviceCallbackHandler] + 522

3 Autopoll 0x000026e8 -[MyAutopoll init] + 114

4   Autopoll                            0x00002623 main + 109

5   Autopoll                            0x0000259a _start + 216

6   Autopoll                            0x000024c1 start + 41


Are you fork()'ing that process and attempting to use CF-level functionality
in the fork child ? This is not supported, and in 10.5 some checks have been added
to error out if CF is used in a fork child.

For daemons/agents started via launchd, forking (or using daemon()) should be unnecessary.
If there is a good reason for creating a new process, you'll have to exec or posix_spawn()
the executable.

 Eric

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 >Daemon/launchd crashes with EXC_BREAKPOINT (SIGTRAP) (From: "Elango C" <email@hidden>)



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