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[Qemu-discuss] Debug kernel hang with qemu

From: p_j_r_m
Subject: [Qemu-discuss] Debug kernel hang with qemu
Date: Tue, 8 Jan 2013 20:52:01 +0000 (GMT)

I´m trying to debug a i386 kernel hang using qemu.Problem happens when,inside my guest, i send a SIGKILL to a realtime process (openais aisexec cluster daemon).This hangs kernel exactly as in real hardware!.
So I do :
gdb ./vmlinux
(gdb) target remote localhost:1234
(gdb) continue
but when I send the signal from guest shell nothing happens in gdb.I´ve used the GDB "handle 9 pass" option with same result.If I do a CTRL+C in gdb and a backtrace, I´m not sure if that shows the kernel status when i sent kill -9 or is the status when that SIGINT is received what I see.
Using qemu...how could I know backtrace when the SIGKILL signal is received?.What it the backtrace I see when I do a CTRL+C inside gdb?
Thank you

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