Date: Mon, 11 Apr 2016 11:02:16 -0700 From: Mark Johnston <markj@FreeBSD.org> To: Jihyun Yu <yjh0502@gmail.com> Cc: freebsd-dtrace@freebsd.org Subject: Re: [patch] Fix crash on userland fbt tracing Message-ID: <20160411180215.GA20803@wkstn-mjohnston.west.isilon.com> In-Reply-To: <CALog5aJea4ZV8jJLNQPcDu1QFBTT65va-1MO7vidgyWFsnj92Q@mail.gmail.com> References: <CALog5aJea4ZV8jJLNQPcDu1QFBTT65va-1MO7vidgyWFsnj92Q@mail.gmail.com>
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On Mon, Apr 11, 2016 at 07:05:01PM +0900, Jihyun Yu wrote:
> How to reproduce crash (tested on 10.3)
>
> - Run `top` on a shell
>
> - List dtrace probes with following command:
> dtrace -p `pgrep top` -ln 'pid$target::clear:entry {}
> pid$target::clear:return {}'
>
> - Try to attach probes without specifing pid provider
> # dtrace -p `pgrep top` -n '::clear:entry {} ::clear:return {}'
> Assertion failed: (err == 0), file
> /usr/src/cddl/lib/libdtrace/../../../cddl/contrib/opensolaris/lib/libdtrace/common/dt_proc.c,
> line 1131.
>
>
> The crash is caused by a deadlock, and here's a fix.
This was committed as r297827. Thanks!
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