Commit Graph

64 Commits

Author SHA1 Message Date
jhb
3f6e2e8e0b - Rename 'traceall' to 'alltrace' so that the 'tr' shortcut for 'trace'
still works.  Also, this is consistent with 'show pcpu' vs
  'show allpcpu'.  (And 'show allstacks' on OS X for that matter.)
- Add 'bt' as an alias for 'trace'.  We already have a 'where' alias as
  well, so this makes it easier for gdb-wired hands to work in ddb.

Ok'd by:	rwatson (1)
Requested by:	scottl (2)
MFC after:	1 day
2005-10-24 15:21:36 +00:00
cognet
fad768f07c - Call db_setup_paging() for traceall.
- Make it so one can't call db_setup_paging() if it has already been called
before. traceall needs this, or else the db_setup_paging() call from
db_trace_thread() will reset the printed line number, and override its
argument.
This is not perfect for traceall, because even if one presses 'q' while in
the middle of printing a backtrace it will finish printing the backtrace
before exiting, as db_trace_thread() won't be notified it should stop, but
it is hard to do better without reworking the pager interface a lot more.
2005-10-02 22:57:31 +00:00
rwatson
f3a3ddf22d Add a DDB "traceall" function, which stack traces all known process
threads.  This is quite useful if generating a debug log for post-mortem
by another developer, in which case the person at the console may not
know which threads are of interest.  The output of this can be quite
long.

Discussed with:	kris
MFC after:	3 days
2005-10-02 11:41:12 +00:00
obrien
10886230c5 Remove the need to forward declare statics by moving them around. 2005-08-10 07:08:14 +00:00
marcel
9e64e57e54 Implement functions calls from within DDB on ia64. On ia64 a function
pointer doesn't point to the first instruction of that function, but
rather to a descriptor. The descriptor has the address of the first
instruction, as well as the value of the global pointer. The symbol
table doesn't know anything about descriptors, so if you lookup the
name of a function you get the address of the first instruction. The
cast from the address, which is the result of the symbol lookup, to a
function pointer as is done in db_fncall is therefore invalid.
Abstract this detail behind the DB_CALL macro. By default DB_CALL is
defined as db_fncall_generic, which yields the old behaviour. On ia64
the macro is defined as db_fncall_ia64, in which a descriptor is
constructed to yield a valid function pointer.

While here, introduce DB_MAXARGS. DB_MAXARGS replaces the existing
(local) MAXARGS. The DB_MAXARGS macro can be defined by platforms to
create a convenient maximum. By default this will be the legacy 10.
On ia64 we define this macro to be 8, for 8 is the maximum number of
arguments that can be passed in registers. This avoids having to
implement spilling of arguments on the memory stack.

Approved by: re (dwhite)
2005-07-02 23:52:37 +00:00
imp
221512a6a9 Start each of the license/copyright comments with /*- 2005-01-06 01:34:41 +00:00
rwatson
410699c6a2 When printing a stack trace for a thread, also print the pid and tid.
When a series of traces is included in a bug report, this will make it
easier to tie the trace information back to ps or threads output,
each of which will show the pid or the tid, but usually not both.
2004-11-23 23:11:47 +00:00
marcel
0af700ac7e Oops... Add the CS_OWN flag to the trace and where commands so that
db_stack_trace() actually has a chance to parse its own arguments.
2004-07-21 05:55:51 +00:00
marcel
f77d7b9449 Unify db_stack_trace_cmd(). All it did was look up the thread given
the thread ID and call db_trace_thread().
Since arm has all the logic in db_stack_trace_cmd(), rename the
new DB_COMMAND function to db_stack_trace to avoid conflicts on
arm.
While here, have db_stack_trace parse its own arguments so that
we can use a more natural radix for IDs. If the ID is not a thread
ID, or more precisely when no thread exists with the ID, try if
there's a process with that ID and return the first thread in it.
This makes it easier to print stack traces from the ps output.

requested by: rwatson@
tested on: amd64, i386, ia64
2004-07-21 05:07:09 +00:00
marcel
c952cbd124 Re-add the gdb command. It was removed to be replaced by something
more generic, but that didn't actually happen. Since the feature to
switch backends (and historically this means from DDB to GDB) is
important, make sure people can do just that until such the generic
mechanism actually sees the light of day.

Suggested by: rwatson@
2004-07-12 01:38:07 +00:00
marcel
aae5483213 Mega update for the KDB framework: turn DDB into a KDB backend.
Most of the changes are a direct result of adding thread awareness.
Typically, DDB_REGS is gone. All registers are taken from the
trapframe and backtraces use the PCB based contexts. DDB_REGS was
defined to be a trapframe on all platforms anyway.
Thread awareness introduces the following new commands:
	thread X	switch to thread X (where X is the TID),
	show threads	list all threads.

The backtrace code has been made more flexible so that one can
create backtraces for any thread by giving the thread ID as an
argument to trace.

With this change, ia64 has support for breakpoints.
2004-07-10 23:47:20 +00:00
phk
0feacd16e3 Give DDB a "watchdog" command which disables all watchdogs. 2004-02-29 09:55:32 +00:00
marcel
c1d4b42a69 Further cleanup <machine/cpu.h> and <machine/md_var.h>: move the MI
prototypes of cpu_halt(), cpu_reset() and swi_vm() from md_var.h to
cpu.h. This affects db_command.c and kern_shutdown.c.

ia64: move all MD prototypes from cpu.h to md_var.h. This affects
madt.c, interrupt.c and mp_machdep.c. Remove is_physical_memory().
It's not used (vm_machdep.c).

alpha: the MD prototypes have been left in cpu.h with a comment
that they should be there. Moving them is left for later. It was
expected that the impact would be significant enough to be done in
a seperate commit.

powerpc: MD prototypes left in cpu.h. Comment added.

Suggested by: bde
Tested with: make universe (pc98 incomplete)
2003-08-16 16:57:57 +00:00
jhb
7a022c4902 Add a one-shot callout facility to db_printf() that executes the registered
callout when a specified number of lines have been output.  This can be
used to implement pagers for ddb commands that output a lot of text.  A
simple paging function is included that automatically rearms itself when
fired.

Reviewed by:	bde, julian
2003-07-31 17:27:52 +00:00
obrien
62dc1f7c25 Use __FBSDID(). 2003-06-10 22:09:23 +00:00
phk
bfaecf4a47 Make "where" an alias for "trace" 2003-06-01 09:06:23 +00:00
phk
5d80f8f84b Change "dev_t gdbdev" to "void *gdb_arg", some possible paths for GDB
will not have a dev_t.
2003-02-16 19:22:21 +00:00
julian
dde96893c9 Add code to ddb to allow backtracing an arbitrary thread.
(show thread {address})

Remove the IDLE kse state and replace it with a change in
the way threads sahre KSEs. Every KSE now has a thread, which is
considered its "owner" however a KSE may also be lent to other
threads in the same group to allow completion of in-kernel work.
n this case the owner remains the same and the KSE will revert to the
owner when the other work has been completed.

All creations of upcalls etc. is now done from
kse_reassign() which in turn is called from mi_switch or
thread_exit(). This means that special code can be removed from
msleep() and cv_wait().

kse_release() does not leave a KSE with no thread any more but
converts the existing thread into teh KSE's owner, and sets it up
for doing an upcall. It is just inhibitted from being scheduled until
there is some reason to do an upcall.

Remove all trace of the kse_idle queue since it is no-longer needed.
"Idle" KSEs are now on the loanable queue.
2002-12-28 01:23:07 +00:00
phk
904e50c477 Indentation indicates missing braces.
Spotted by:	FlexeLint
2002-10-01 21:59:46 +00:00
markm
62df99fb84 Constify to kill some warnings. 2002-09-21 17:29:36 +00:00
bde
f8611316d9 Fixed some style bugs in the removal of __P(()). Continuation lines
were not outdented to preserve non-KNF lining up of code with parentheses.
Switch to KNF formatting.
2002-03-23 11:53:03 +00:00
alfred
eddc6122c9 Remove __P. 2002-03-20 05:14:42 +00:00
mjacob
adc513481a pid is 'long' on alpha. 2002-01-17 02:14:44 +00:00
dd
da78f952f3 Implement a "kill" DDB command which is an interface to psignal() that
respects locks.  Before SMPng, one was able to call psignal()
using the "call" command, but this is no longer possible because it
does not respect locks by itself.  This is very useful when one has
gotten their machine into a state where it is impossible to spawn
ps/kill or su to root.

In this case, respecting locks essentially means trying to aquire the
proc lock before calling psignal().  We can't block in the debugger,
so if trylock fails, the operation fails.  This also means that we
can't use pfind(), since that will attempt to lock the process for us.

Reviewed by:	jhb
2001-11-27 19:56:28 +00:00
arr
d1ac48c2ff - Include machine/md_var.h to get rid of cpu_reset() warning. (-Wall)
Approved by: jhb
2001-11-05 21:50:55 +00:00
peter
88067114a1 Add a 'reset' command. This is useful for panics really early before
any symbols are loaded.  Especially for unattended machines.
2001-11-03 04:55:48 +00:00
kris
76deaa008e Quiet a variable format-string warning.
MFC after:	1 week
2001-07-19 02:05:00 +00:00
bsd
17eb1bfcbf Add 'hwatch' and 'dhwatch' ddb commands analogous to 'watch' and
'dwatch'.  The new commands install hardware watchpoints if supported
by the architecture and if there are enough registers to cover the
desired memory area.

No objection by: audit@, hackers@

MFC after: 2 weeks
2001-07-11 03:15:25 +00:00
julian
869029d5d7 A set of changes to reduce the number of include files the kernel
takes from /usr/include. I cannot check them on alpha.. (will try beast)

Briefly looked at by: Warner Losh <imp@harmony.village.org>
2001-07-08 04:56:07 +00:00
peter
f10fa038c1 With this commit, I hereby pronounce gensetdefs past its use-by date.
Replace the a.out emulation of 'struct linker_set' with something
a little more flexible.  <sys/linker_set.h> now provides macros for
accessing elements and completely hides the implementation.

The linker_set.h macros have been on the back burner in various
forms since 1998 and has ideas and code from Mike Smith (SET_FOREACH()),
John Polstra (ELF clue) and myself (cleaned up API and the conversion
of the rest of the kernel to use it).

The macros declare a strongly typed set.  They return elements with the
type that you declare the set with, rather than a generic void *.

For ELF, we use the magic ld symbols (__start_<setname> and
__stop_<setname>).  Thanks to Richard Henderson <rth@redhat.com> for the
trick about how to force ld to provide them for kld's.

For a.out, we use the old linker_set struct.

NOTE: the item lists are no longer null terminated.  This is why
the code impact is high in certain areas.

The runtime linker has a new method to find the linker set
boundaries depending on which backend format is in use.

linker sets are still module/kld unfriendly and should never be used
for anything that may be modular one day.

Reviewed by:	eivind
2001-06-13 10:58:39 +00:00
peter
3b842d34e8 $Id$ -> $FreeBSD$ 1999-08-28 01:08:13 +00:00
phk
ee871b6440 Merge the cons.c and cons.h to the best of my ability. alpha may or
may not compile, I can't test it.
1999-08-09 10:35:05 +00:00
peter
700ead8c3e Quiet warnings on Alpha. (db_expr_t is a long on alpha, int on x86) 1999-07-01 19:42:56 +00:00
phk
e8f4fc4a1d add some amount of sanity to the way the gdb stuff finds its device.
I'm not too happy about the result either, but at least it has less
chance of backfiring.

This particular feature could be called "a mess" without offending
anybody.
1999-05-09 10:51:13 +00:00
mckusick
6106d6252c Get rid of extern declarations on gdb stuff so systems compiled without
DDB will compile. Warn users that try to use GDB without specifying a GDB
port in their configuration file.
1999-05-07 23:08:23 +00:00
jdp
b5fcc979e2 Replace includes of <sys/kernel.h> with includes of
<sys/linker_set.h> in those files that use only the linker set
definitions.
1999-01-14 06:22:10 +00:00
bde
c9efed72bc Use not-so-new printf formats %r and/or %z instead of %n and/or %+x. 1998-07-08 10:53:58 +00:00
phk
af59853834 Redo the previous commit in a more Bruce-friendly fashion.
Urged by:	bde
1998-05-19 18:42:09 +00:00
phk
e9c01f2e74 Add "show msgbuf" command 1998-05-19 11:02:24 +00:00
bde
e159c8ff97 Ensure that the linker sets for commands exist by putting a standard
command in each of them.  This removes the need for hard-to-configure
dummy instantiations of the sets.
1998-02-13 02:19:29 +00:00
eivind
d7a6ab2803 Staticize. 1998-02-09 06:11:36 +00:00
peter
94b6d72794 Back out part 1 of the MCFH that changed $Id$ to $FreeBSD$. We are not
ready for it yet.
1997-02-22 09:48:43 +00:00
jkh
808a36ef65 Make the long-awaited change from $Id$ to $FreeBSD$
This will make a number of things easier in the future, as well as (finally!)
avoiding the Id-smashing problem which has plagued developers for so long.

Boy, I'm glad we're not using sup anymore.  This update would have been
insane otherwise.
1997-01-14 07:20:47 +00:00
bde
aeabb37c7e Fixed bogus linkage of one of the ddb linker sets. 1996-12-18 17:58:24 +00:00
bde
6145ccc494 Support statically attaching of ddb commands in non-ddb modules.
The details are hidden in the DB_COMMAND(cmd_name, func_name) and
DB_SHOW_COMMAND(cmd_name, func_name) macros.  DB_COMMAND() adds to
the top-level ddb command table and DB_SHOW_COMMAND adds to the
`show' subtable.  Most external commands will probably be `show'
commands with no side effects.  They should check their pointer
args more carefully than `show map' :-), or ddb should trap internal
faults better (like it does for memory accesses).

The vm ddb commands are temporarily unattached.

ddb.h:
Also declare `db_indent' and db_iprintf() which will replace vm's
`indent' and iprintf().
1996-09-14 09:13:15 +00:00
pst
8e672a5c30 Allow the user to switch into gdb mode from ddb 1996-08-27 19:46:28 +00:00
bde
0cb993b9a2 Reduced and cleaned up #includes. 1995-12-10 19:08:32 +00:00
dg
c30f46c534 Untangled the vm.h include file spaghetti. 1995-12-07 12:48:31 +00:00
phk
6056f81916 Staticized and '#ifdef notused' stuff we don't use. 1995-11-29 10:25:50 +00:00
bde
ed3ff9247c Completed function declarations and/or added prototypes and/or #includes
to get the prototypes.

Changed some `int's to `boolean_t's.  boolean_t's are ints so they are
hard to distinguish from ints.

Converted function headers to old-style.  ddb is written in K&R1 C
except where we broke it.
1995-11-24 14:13:42 +00:00