Re: [HACKERS] Getting list of held lwlocks from debugger

[Tom Lane]

Jeff Janes  writes:
> Is there an easy way to get a list of held lwlocks out of gdb attached to a
> core dump (or for that matter attached to a live process)?

There's the held_lwlocks array in lwlock.c, but that will just give you
pointers.  What I imagine you're wishing for is some symbolic display
of which locks they are, and I see no code for that.

The "lock tranche" infrastructure that Robert's been working on would
allow for reasonably decent printout, but it's not complete yet ...

regards, tom lane


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[HACKERS] Getting list of held lwlocks from debugger

[Jeff Janes]

Is there an easy way to get a list of held lwlocks out of gdb attached to a
core dump (or for that matter attached to a live process)?

I can try manually walking the internal data structure, but I am hoping for
something analogous to the way you get memory contexts:

(gdb) p MemoryContextStats(TopMemoryContext)

Cheers,

Jeff