1
linux/arch/um/include
Jeff Dike 3eddddcf23 [PATCH] uml: breakpoint an arbitrary thread
This patch implements a stack trace for a thread, not unlike sysrq-t does.
The advantage to this is that a break point can be placed on showreqs, so that
upon showing the stack, you jump immediately into the debugger.  While sysrq-t
does the same thing, sysrq-t shows *all* threads stacks.  It also doesn't work
right now.  In the future, I thought it might be acceptable to make this show
all pids stacks, but perhaps leaving well enough alone and just using sysrq-t
would be okay.  For now, upon receiving the stack command, UML switches
context to that thread, dumps its registers, and then switches context back to
the original thread.  Since UML compacts all threads into one of 4 host
threads, this sort of mechanism could be expanded in the future to include
other debugging helpers that sysrq does not cover.

Note by jdike - The main benefit to this is that it brings an arbitrary thread
back into context, where it can be examined by gdb.  The fact that it dumps it
stack is secondary.  This provides the capability to examine a sleeping
thread, which has existed in tt mode, but not in skas mode until now.

Also, the other threads, that sysrq doesn't cover, can be gdb-ed directly
anyway.

Signed-off-by: Allan Graves<allan.graves@gmail.com>
Signed-off-by: Jeff Dike <jdike@addtoit.com>
Cc: Paolo Giarrusso <blaisorblade@yahoo.it>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
2005-09-17 11:49:59 -07:00
..
sysdep-i386 [PATCH] uml: system call path cleanup 2005-09-05 00:06:23 -07:00
sysdep-ia64 [PATCH] uml: S390 preparation, abstract host page fault data 2005-05-05 16:36:36 -07:00
sysdep-ppc [PATCH] uml: S390 preparation, abstract host page fault data 2005-05-05 16:36:36 -07:00
sysdep-x86_64 [PATCH] uml: system call path cleanup 2005-09-05 00:06:23 -07:00
aio.h [PATCH] uml: add host AIO support to block driver 2005-09-05 00:06:23 -07:00
chan_kern.h Linux-2.6.12-rc2 2005-04-16 15:20:36 -07:00
chan_user.h Linux-2.6.12-rc2 2005-04-16 15:20:36 -07:00
choose-mode.h [PATCH] uml: fix compilation for __CHOOSE_MODE addition 2005-04-16 15:25:39 -07:00
common-offsets.h [PATCH] bogus symbol used in arch/um/os-Linux/elf_aux.c 2005-09-07 17:17:33 -07:00
elf_user.h Linux-2.6.12-rc2 2005-04-16 15:20:36 -07:00
frame_kern.h Linux-2.6.12-rc2 2005-04-16 15:20:36 -07:00
helper.h Linux-2.6.12-rc2 2005-04-16 15:20:36 -07:00
init.h [PATCH] uml: use host AIO support 2005-09-05 00:06:23 -07:00
initrd.h Linux-2.6.12-rc2 2005-04-16 15:20:36 -07:00
irq_kern.h [PATCH] uml: use host AIO support 2005-09-05 00:06:23 -07:00
irq_user.h Linux-2.6.12-rc2 2005-04-16 15:20:36 -07:00
kern_util.h [PATCH] uml: S390 preparation, abstract host page fault data 2005-05-05 16:36:36 -07:00
kern.h Linux-2.6.12-rc2 2005-04-16 15:20:36 -07:00
line.h [PATCH] uml: hot-unplug code cleanup 2005-06-25 16:24:36 -07:00
mconsole_kern.h [PATCH] uml: hot-unplug code cleanup 2005-06-25 16:24:36 -07:00
mconsole.h [PATCH] uml: breakpoint an arbitrary thread 2005-09-17 11:49:59 -07:00
mem_kern.h Linux-2.6.12-rc2 2005-04-16 15:20:36 -07:00
mem_user.h Linux-2.6.12-rc2 2005-04-16 15:20:36 -07:00
mem.h [PATCH] uml: inline mk_pte and various friends 2005-09-10 12:00:18 -07:00
mode_kern.h Linux-2.6.12-rc2 2005-04-16 15:20:36 -07:00
mode.h Linux-2.6.12-rc2 2005-04-16 15:20:36 -07:00
net_kern.h Linux-2.6.12-rc2 2005-04-16 15:20:36 -07:00
net_user.h [PATCH] uml: compile fixes for gcc 4 2005-06-08 16:21:12 -07:00
os.h [PATCH] uml: move libc-dependent startup and signal code 2005-09-05 00:06:24 -07:00
process.h Linux-2.6.12-rc2 2005-04-16 15:20:36 -07:00
ptrace_user.h Linux-2.6.12-rc2 2005-04-16 15:20:36 -07:00
registers.h [PATCH] uml: skas0 - separate kernel address space on stock hosts 2005-07-07 18:23:44 -07:00
sigcontext.h Linux-2.6.12-rc2 2005-04-16 15:20:36 -07:00
sigio.h Linux-2.6.12-rc2 2005-04-16 15:20:36 -07:00
signal_kern.h Linux-2.6.12-rc2 2005-04-16 15:20:36 -07:00
signal_user.h Linux-2.6.12-rc2 2005-04-16 15:20:36 -07:00
skas_ptrace.h [PATCH] uml: header and code cleanup 2005-05-05 16:36:39 -07:00
syscall.h [PATCH] uml: system call path cleanup 2005-09-05 00:06:23 -07:00
sysrq.h [PATCH] uml: stack dump fix 2005-05-28 16:46:13 -07:00
tempfile.h Linux-2.6.12-rc2 2005-04-16 15:20:36 -07:00
time_user.h [PATCH] uml: Proper clone support for skas0 2005-07-07 18:23:44 -07:00
tlb.h [PATCH] uml: skas0 stubs now check system call return values 2005-09-05 00:06:24 -07:00
ubd_user.h Linux-2.6.12-rc2 2005-04-16 15:20:36 -07:00
um_mmu.h Linux-2.6.12-rc2 2005-04-16 15:20:36 -07:00
um_uaccess.h [PATCH] remove verify_area(): remove verify_area() from various uaccess.h headers 2005-09-07 16:57:35 -07:00
umid.h Linux-2.6.12-rc2 2005-04-16 15:20:36 -07:00
uml_uaccess.h Linux-2.6.12-rc2 2005-04-16 15:20:36 -07:00
user_util.h [PATCH] uml: move libc-dependent startup and signal code 2005-09-05 00:06:24 -07:00
user.h Linux-2.6.12-rc2 2005-04-16 15:20:36 -07:00