Date: Thu, 25 Apr 2013 09:45:13 +0300 From: Andriy Gapon <avg@FreeBSD.org> To: Mark Johnston <markj@FreeBSD.org> Cc: svn-src-head@FreeBSD.org, svn-src-all@FreeBSD.org, src-committers@FreeBSD.org Subject: Re: svn commit: r248644 - head/cddl/contrib/opensolaris/lib/libdtrace/common Message-ID: <5178D0F9.9000801@FreeBSD.org> In-Reply-To: <20130421030818.GA23819@gloom> References: <201303230857.r2N8vsHL058716@svn.freebsd.org> <20130421030818.GA23819@gloom>
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on 21/04/2013 06:08 Mark Johnston said the following: > On Sat, Mar 23, 2013 at 08:57:54AM +0000, Andriy Gapon wrote: >> Author: avg >> Date: Sat Mar 23 08:57:54 2013 >> New Revision: 248644 >> URL: http://svnweb.freebsd.org/changeset/base/248644 >> >> Log: >> dtrace: ensure that we can always catch a process (e.g. when -c is used) >> >> It is not guaranteed that a program has a symbol table entry for main >> and thus that it would be possible to set a breakpoint on it. >> >> Reviewed by: rpaulo >> Discussed with: rpaulo >> MFC after: 13 days > > Hi Andriy, > > This commit seems to break USDT for me. When I for instance try to run > the toy example at https://wiki.freebsd.org/DTrace/userland (the > database provider), I get > > markj@gloom: ~/tmp/dtrace/db $ sudo dtrace -s db.d -c ./db > dtrace: failed to compile script db.d: line 2: probe description database23147:::query-start does not match any probes > > When I revert this commit and recompile the example program and > libdtrace, it works as expected. Mark, thank you very much for the report. It seems that I didn't fully understand consequences of the change when I made it. I am still looking into the details of the relevant differences between Solaris/Illumos and FreeBSD. Because I am going on a vacation I've decided to revert this commit for now. -- Andriy Gapon
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