[轉]Avoiding GDB Signal Noise.

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原文：http://peeterjoot.wordpress.com/2010/07/07/avoiding-gdb-signal-noise/

A quick note for future reference (recorded elsewhere and subsequently lost).

Suppose your program handles a signal that gdb intercepts by default, like the following example

(gdb) cContinuing.Program received signal SIGUSR1, User defined signal 1.[Switching to Thread 47133440862528 (LWP 4833)]0x00002ade149d6baa in semtimedop () from /lib64/libc.so.6(gdb) c

You can hit ‘c’ to continue at this point, but if it happens repeatedly in various threads (like when one thread is calling pthread_kill() to force each other thread in turn to dump its stack and stuff) this repeated ‘c’ing can be a bit of a pain.

For the same SIGUSR1 example above, you can query the gdb handler rules like so:

(gdb) info signal SIGUSR1Signal        Stop      Print   Pass to program DescriptionSIGUSR1       Yes       Yes     Yes             User defined signal 1

And if deemed to not be of interest, where you just want your program to continue without prompting or spamming, something like the following does the trick:

(gdb) handle SIGUSR1 noprint nostopSignal        Stop      Print   Pass to program DescriptionSIGUSR1       No        No      Yes             User defined signal 1

??