Re: ctfmerge core dump

On Sat, May 5, 2012 at 7:54 PM, David Xu <listlog2011_at_gmail.com> wrote:
> On 2012/5/6 5:08, b. f. wrote:
>>
>> On 5/5/12, Steve Wills<swills_at_freebsd.org>  wrote:
>>>
>>> On 05/05/12 15:43, b. f. wrote:
>>>>
>>>> Steve Wills wrote:
>>>>>
>>>>> After updating from -CURRENT as of April 5 to one built today, I now
>>>>> get
>>>>> a core dump running ctfmerge on libc:
>>>>>
>>>>> ctfmerge -L VERSION -g -o libc.so.7 syscall.So fork.So......
>>>>> Bus error (core dumped)
>>>>> *** [libc.so.7] Error code 138
>>>>>
>>>>> Anyone else seeing this or have any idea how to avoid it?
>>>>
>>>> Yes, I'm also seeing such problems when attempting to build a r235052
>>>> amd64 kernel on r235035 amd64. (This problem did not occur when
>>>> building a r235035 amd64 world and kernel on r234854 amd64.)  ctfmerge
>>>> succeeds for several kernel modules but fails with kgssapi.ko.debug,
>>>> linux.ko.debug, or kernel.debug. I'm not yet sure which change has
>>>> caused this, or how to avoid it.
>>>>
>>> Thanks for the info. I took a look at the dump and see this:
>>>
>>> % sudo gdb /usr/bin/ctfmerge ctfmerge.core
>>> [GDB will not be able to debug user-mode threads: Undefined symbol
>>> "td_thr_getxmmregs"]
>>> GNU gdb 6.1.1 [FreeBSD]
>>> Copyright 2004 Free Software Foundation, Inc.
>>> GDB is free software, covered by the GNU General Public License, and you
>>> are
>>> welcome to change it and/or distribute copies of it under certain
>>> conditions.
>>> Type "show copying" to see the conditions.
>>> There is absolutely no warranty for GDB.  Type "show warranty" for
>>> details.
>>> This GDB was configured as "amd64-marcel-freebsd"...
>>> Core was generated by `ctfmerge'.
>>> Program terminated with signal 10, Bus error.
>>> Reading symbols from /lib/libctf.so.2...done.
>>> Loaded symbols for /lib/libctf.so.2
>>> Reading symbols from /usr/lib/libdwarf.so.3...done.
>>> Loaded symbols for /usr/lib/libdwarf.so.3
>>> Reading symbols from /usr/lib/libelf.so.1...done.
>>> Loaded symbols for /usr/lib/libelf.so.1
>>> Reading symbols from /lib/libz.so.6...done.
>>> Loaded symbols for /lib/libz.so.6
>>> Reading symbols from /lib/libthr.so.3...done.
>>> Loaded symbols for /lib/libthr.so.3
>>> Reading symbols from /lib/libc.so.7...done.
>>> Loaded symbols for /lib/libc.so.7
>>> Reading symbols from /libexec/ld-elf.so.1...done.
>>> Loaded symbols for /libexec/ld-elf.so.1
>>> #0  0x00000000004064b0 in fifo_len (f=0x801c29070) at
>>>
>>> /usr/src/cddl/usr.bin/ctfmerge/../../../cddl/contrib/opensolaris/tools/ctf/cvt/fifo.c:128
>>> 128             for (i = 0, fn = f->f_head; fn; fn = fn->fn_next, i++);
>>> (gdb) bt
>>> #0  0x00000000004064b0 in fifo_len (f=0x801c29070) at
>>>
>>> /usr/src/cddl/usr.bin/ctfmerge/../../../cddl/contrib/opensolaris/tools/ctf/cvt/fifo.c:128
>>> #1  0x000000000040622c in worker_thread (wq=0x610ee0) at
>>>
>>> /usr/src/cddl/usr.bin/ctfmerge/../../../cddl/contrib/opensolaris/tools/ctf/cvt/ctfmerge.c:329
>>> #2  0x0000000801078da9 in thread_start (curthread=0x801c0f800) at
>>> /usr/src/lib/libthr/thread/thr_create.c:284
>>> #3  0x0000000000000000 in ?? ()
>>> Cannot access memory at address 0x7fffff5fb000
>>> (gdb)
>>>
>> After reverting the recent libthr changes in r234947, I am no longer
>> encountering this problem.
>>
>> b.
>>
> I have fixed it in r235068.

hopefully itll fix kernel compilations also halting with signal 10

>
>
>
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