Date: Sun, 2 Jun 2013 17:35:27 +0200 From: Dimitry Andric <dim@FreeBSD.org> To: Ted Faber <faber@lunabase.org> Cc: Kostik Belousov <kostikbel@gmail.com>, freebsd-ports@freebsd.org Subject: Re: Another Firefox 21.0 crash (new backtrace) Message-ID: <6B3D745E-9ADD-4B2A-B2C0-53B920B9CC71@FreeBSD.org> In-Reply-To: <20130529035333.GA2340@mail.lunabase.org> References: <20130525230731.GA93415@mail.lunabase.org> <51A49C40.1080209@FreeBSD.org> <20130528155234.GA17344@mail.lunabase.org> <20130529035333.GA2340@mail.lunabase.org>
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On May 29, 2013, at 05:53, Ted Faber <faber@lunabase.org> wrote:
> On Tue, May 28, 2013 at 08:52:35AM -0700, Ted Faber wrote:
>> On Tue, May 28, 2013 at 02:00:00PM +0200, Dimitry Andric wrote:
>>> On 2013-05-26 01:07, Ted Faber wrote:
>>>> I'm seeing a repeatable, consistent segmentation fault before the first
>>>> window appears (though firefox -ProfileManager brings up the
>>>> profile manager, but crashes when I try to actually start the browser).
...
> OK, I improved my svn fu, pulled the tree, extracted the patch, applied
> it, made and installed world.
>
> Now I see different behavior, but no better. Still gets a SEGV, but a
> different trace. (Attached)
Ok, I think I have figured out what the problem is: Firefox's JavaScript
OSFile implementation loads libc.so.6 if it is available! That is, if
you have the compat6x package installed, it loads
/usr/local/lib/libc.so.6, even while /lib/libc.so.7 is already loaded.
This wreaks havoc when it later tries to call libc functions via libffi,
and the result is that it calls into a completely bogus PLT entry. Most
of the time, this leads to a crash.
So the easiest way to avoid the crash for now is to uninstall the
compat6x package, and making sure there is no libc.so.6 in
/usr/local/lib/compat. Then Firefox should start with no problems.
As a better fix, please try dropping the attached file into the
/usr/ports/www/firefox/files directory, then rebuild the firefox port
from scratch, and reinstall it.
-Dimitry
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filename=patch-toolkit-components-osfile-osfile_unix_allthreads.jsm
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name="patch-toolkit-components-osfile-osfile_unix_allthreads.jsm"
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--- toolkit/components/osfile/osfile_unix_allthreads.jsm.orig 2013-05-11 21:19:53.000000000 +0200
+++ toolkit/components/osfile/osfile_unix_allthreads.jsm 2013-06-02 17:15:05.000000000 +0200
@@ -40,7 +40,7 @@ if (typeof Components != "undefined") {
// Open libc
let libc;
let libc_candidates = [ "libSystem.B.dylib",
- "libc.so.6",
+ "libc.so.7",
"libc.so" ];
for (let i = 0; i < libc_candidates.length; ++i) {
try {
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