site_archiver@lists.apple.com Delivered-To: darwin-dev@lists.apple.com User-agent: Microsoft-Entourage/11.1.0.040913 I think this is because the source you have for the socket structure is for the ppc version, and gdb uses that to find the offsets and fields for everything. You could try replacing the reserved3/reserved4 by the new fields in the copy of the sourcefile xnu/bsd/sys/socketvar.h that is used by gdb to determine the structure format. If that fails, you may have to look at the structure in hex with gdb and figure out the last part by hand. Those fields are used for internal debug and not part of the KPI, which provides accessors to certain fields of the socket structure. That's why the format is not in sync with the sources you have... on 8/2/06 13:49, Michael Tuexen at Michael.Tuexen@lurchi.franken.de wrote:
Hi Laurent,
hmmm, sounds really good, but we do not see the symbols you mention being part of the socket structure... How can we access the fields in gdb?
Thank you very much in advance.
Best regards Michael
On Aug 2, 2006, at 10:23 PM, Laurent Dumont wrote:
Michael,
On 10.4.x for i386 there is a slightly different debug mechanism for the socket lock and unlock. Instead of reserved3 and reserverd4, there is circular buffers with the 4 last lock/unlocks for the socket:
u_int32_t lock_lr[4]; int next_lock_lr; u_int32_t unlock_lr[4]; int next_unlock_lr;
"next_lock_lr" and "next_unlock_lr" provide the number (0 to 3) for the next debug link register slot to be used. You can work your way from n-1 and find the last four lock/unlock recorded for that socket.
Laurent
on 8/2/06 11:23, Michael Tuexen at Michael.Tuexen@lurchi.franken.de wrote:
Dear all,
we are currently debugging a locking issue on Mac OS X on Intel. It is related to socket locks and we are able to break into the debugger to inspect the socket structures. On PPC one can find the last caller of the socket_lock() function, but is there a similar way in doing it in Intel, possibly by inspecting the reserved3 or reserved4 fields in the socket structure? What is stored in these fields?
Thank you very much for your help in advance.
Best regards Michael
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