Date: Mon, 2 Apr 2012 13:12:36 -0400 From: John Baldwin <jhb@freebsd.org> To: Yuri <yuri@rawbw.com> Cc: freebsd-hackers@freebsd.org, hackers@freebsd.org Subject: Re: Is there any modern alternative to pstack? Message-ID: <201204021312.36568.jhb@freebsd.org> In-Reply-To: <4F79D63E.7010200@rawbw.com> References: <4F775DF5.1020704@rawbw.com> <201204020831.09253.jhb@freebsd.org> <4F79D63E.7010200@rawbw.com>
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On Monday, April 02, 2012 12:39:26 pm Yuri wrote: > On 04/02/2012 05:31, John Baldwin wrote: > > Hmm, I don't know if the port has it, but I did some work on pstack a while > > ago to make it work with libthread_db so it at least handles i386 ok. It > > needs to be modified to use something like libunwind though or some other > > unwinder. And possibly it should use libelf instead of its own ELF-parsing > > code. > > I see pstack -1.2_1 failing even on i386: > > pstack: cannot read context for thread 0x1879f > pstack: failed to read more threads Yes, threads don't work for modern binaries (newer than 4.x) without my changes to make it use libthread_db. You can find the patch I used for this at http://www.freebsd.org/~jhb/patches/pstack_threads.patch -- John Baldwin
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