Date: Fri, 03 Feb 2012 23:55:49 -0800 From: Julian Elischer <julian@freebsd.org> To: FreeBSD Current <current@freebsd.org> Subject: problem with kgdb and modules Message-ID: <4F2CE485.5020909@freebsd.org>
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so We upgraded our development machines from 8 stable to 9 stable. and now kgdb can't debug inside modules. instead of getting anything useful, we just get: (kgdb) bt #0 0xffffffff81814600 in ?? () from /boot/kernel/netgraph.ko #1 0xffffffff81812d80 in ?? () from /boot/kernel/ng_socket.ko #2 0x0000000000000037 in ?? () #3 0x0000000000000002 in ?? () #4 0xfffffe0007176aa0 in ?? () #5 0xfffffe0007176aa0 in ?? () #6 0xffffffff818134a0 in ?? () from /boot/kernel/ng_socket.ko #7 0xffffffff81813960 in ?? () from /boot/kernel/ng_socket.ko #8 0xffffff860fa3cad0 in ?? () #9 0xffffffff808cc76e in socreate (dom=Variable "dom" is not available. ) at ../../../kern/uipc_socket.c:411 but stopping in the kernel itself, we DO see stuff.. (kgdb) break socreate Breakpoint 1 at 0xffffffff808cc628: file ../../../kern/uipc_socket.c, line 372. (kgdb) c Continuing. [New Thread 100198] [Switching to Thread 100198] Breakpoint 1, socreate (dom=32, aso=0xffffff860fa3caf0, type=2, proto=1, cred=0xfffffe000c63f600, td=0xfffffe011501a000) at ../../../kern/uipc_socket.c:372 372 if (proto) (kgdb) bt #0 socreate (dom=32, aso=0xffffff860fa3caf0, type=2, proto=1, cred=0xfffffe000c63f600, td=0xfffffe011501a000) at ../../../kern/uipc_socket.c:372 #1 0xffffffff808cf710 in sys_socket (td=0xfffffe011501a000, uap=0xffffff860fa3cbc0) at ../../../kern/uipc_syscalls.c:199 #2 0xffffffff80b5599a in amd64_syscall (td=0xfffffe011501a000, traced=0) at subr_syscall.c:131 #3 0xffffffff80b40b57 in Xfast_syscall () at ../../../amd64/amd64/exception.S:387 #4 0x00000008011c82ac in ?? () etc. it looks as if modules no longer have stack frames compiled in. does anyone know the culprit?
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