On 21 October 2005 08:45, John Meacham wrote:

How do I force a stack dump with -xc?

my program is locking up in an infinite loop, but it keeps going and won't die itself, I was hoping it would dump stack on ctrl-c but it does not seem to. is there any way to force it to happen? installing a signal handler that fails does not work as it always reports Main.main. John

Tricky; you might try setting the stack size small enough to trigger a stack overflow (+RTS -K). Apart from this, there's no way to get a stack trace as far as I'm aware. We should probably make async exceptions generate a stack trace with -xc too, so you could use a ^C handler that throws an async exception in the main thread. If you compile with profiling then ^C should give you a time profile, which should give you a clue where the infinite loop is. Cheers, Simon