Re: kgdb ported to devel/gdb
On Monday, August 31, 2015 02:32:04 PM John Baldwin wrote: > Over the past several months I have ported kgdb to the version of gdb in > ports. > I have a pending patch to the gdb port to add fork following, but once that is > done (and possibly after updating to 7.10) I will try to add my existing work > as a KGDB option on the port. Until such time, you can try the newer kgdb by > checking out my branch from git. > > Here's my cheat sheet on how to build the newer kgdb. Note that if you build > a world with my cross-libkvm patches you should get a kgdb that can debug > i386 cores on amd64 and vice versa. > > All of the targets that the native devel/gdb support have their backends > ported (so x86, sparc64, powerpc and powerpc64). I have not yet ported > arm or mips since those don't work for userland yet in upstream gdb. I > have only compiled non-x86 backends. Testing of the new kgdb on sparc64 > and powerpc would be appreciated. FYI, this is now present in the devel/gdb port as an off-by-default KGDB option (so you need to build the package yourself for now). Eventually we will turn it on by default. I did manage to get powerpc64 running under qemu and both the old and new kgdb do not work with it. I have the new kgdb close, but it is not able to unwind stacks after the first frame. I have not been able to test sparc64. -- John Baldwin ___ freebsd-current@freebsd.org mailing list https://lists.freebsd.org/mailman/listinfo/freebsd-current To unsubscribe, send any mail to "freebsd-current-unsubscr...@freebsd.org"
Re: kgdb ported to devel/gdb
On Friday, October 02, 2015 09:19:13 AM Andriy Gapon wrote: > On 01/09/2015 00:32, John Baldwin wrote: > > Over the past several months I have ported kgdb to the version of gdb in > > ports. > > I have a pending patch to the gdb port to add fork following, but once that > > is > > done (and possibly after updating to 7.10) I will try to add my existing > > work > > as a KGDB option on the port. Until such time, you can try the newer kgdb > > by > > checking out my branch from git. > > > > Here's my cheat sheet on how to build the newer kgdb. Note that if you > > build > > a world with my cross-libkvm patches you should get a kgdb that can debug > > i386 cores on amd64 and vice versa. > > > > All of the targets that the native devel/gdb support have their backends > > ported (so x86, sparc64, powerpc and powerpc64). I have not yet ported > > arm or mips since those don't work for userland yet in upstream gdb. I > > have only compiled non-x86 backends. Testing of the new kgdb on sparc64 > > and powerpc would be appreciated. > > > > Steps: > > > > % git clone https://github.com/bsdjhb/gdb.git > > % git checkout freebsd-7.9.1-kgdb > > % fetch http://www.freebsd.org/~jhb/gdb/build > > % pkg install devel/gdb > > > > # Having gdb installed will mean you get the python bindings in the right > > # place. > > > > % pkg install gmake > > > > # I think this is the only build tool you need? > > > > % ./build > > % cd obj > > > > # Replace 'obj' with 'obj.' for all but amd64 > > > > % gmake > > > > # ... wait > > > > You will now have a binary at 'obj/gdb/kgdb'. I just run it from my obj > > tree currently when testing. Once it becomes part of the port it will get > > installed as /usr/local/bin/kgdb791 or some such. > > John, > > first of all, thank you very much for this! > > I followed your instructions substituting freebsd-7.10-kgdb for > freebsd-7.9.1-kgdb branch (devel/gdb is also at version 7.10) and the build > process worked just fine. > However, when I try to use the new kgdb it works, but I get some annoying > diagnostics: > > (kgdb) bt > Python Exception Installation error: > gdb.execute_unwinders function is missing: > Python Exception No module named gdb.frames: > #0 doadump (textdump=1) at /usr/src/sys/kern/kern_shutdown.c:291 > #1 0x8063453f in kern_reboot (howto=260) at > /usr/src/sys/kern/kern_shutdown.c:359 > Python Exception Installation error: > gdb.execute_unwinders function is missing: > Python Exception Installation error: > gdb.execute_unwinders function is missing: > #2 0x80634ba4 in vpanic (fmt=, ap=) at > /usr/src/sys/kern/kern_shutdown.c:635 > Python Exception Installation error: > gdb.execute_unwinders function is missing: > #3 0x806348a3 in panic (fmt=) at > /usr/src/sys/kern/kern_shutdown.c:568 > Python Exception Installation error: > gdb.execute_unwinders function is missing: > #4 0x8041bba7 in db_panic (addr=, > have_addr=, count=, modif=) at > /usr/src/sys/ddb/db_command.c:473 > Python Exception Installation error: > gdb.execute_unwinders function is missing: > #5 0x8041b67b in db_command (last_cmdp=, > cmd_table=0x0, > dopager=) at /usr/src/sys/ddb/db_command.c:440 > #6 0x8041b524 in db_command_loop () at > /usr/src/sys/ddb/db_command.c:493 > Python Exception Installation error: > gdb.execute_unwinders function is missing: > #7 0x8041de0b in db_trap (type=, code=) > at > /usr/src/sys/ddb/db_main.c:251 > Python Exception Installation error: > gdb.execute_unwinders function is missing: > Python Exception Installation error: > gdb.execute_unwinders function is missing: > #8 0x80669de8 in kdb_trap (type=19, code=0, tf=0x80f976d0 > ) at /usr/src/sys/kern/subr_kdb.c:653 > Python Exception Installation error: > gdb.execute_unwinders function is missing: > #9 0x80820d26 in trap (frame=0x80f976d0 ) at > /usr/src/sys/amd64/amd64/trap.c:381 > #10 0x80809623 in nmi_calltrap () at > /usr/src/sys/amd64/amd64/exception.S:514 > Python Exception Installation error: > gdb.execute_unwinders function is missing: > #11 0x80619e1f in __mtx_assert (c=, what= out>, > file=, line=) at > /usr/src/sys/kern/kern_mutex.c:842 > Backtrace stopped: previous frame inner to this frame (corrupt stack?) > > Did I miss something? > Thanks! I've noticed this as well. I've taken to building gdb without python support for my testing when building out of git for now. -- John Baldwin ___ freebsd-current@freebsd.org mailing list https://lists.freebsd.org/mailman/listinfo/freebsd-current To unsubscribe, send any mail to "freebsd-current-unsubscr...@freebsd.org"
Re: kgdb ported to devel/gdb
On Fri, Oct 02, 2015 at 09:19:13AM +0300, Andriy Gapon wrote: > On 01/09/2015 00:32, John Baldwin wrote: > > Over the past several months I have ported kgdb to the version of gdb in > > ports. > > I have a pending patch to the gdb port to add fork following, but once that > > is > > done (and possibly after updating to 7.10) I will try to add my existing > > work > > as a KGDB option on the port. Until such time, you can try the newer kgdb > > by > > checking out my branch from git. > > > > Here's my cheat sheet on how to build the newer kgdb. Note that if you > > build > > a world with my cross-libkvm patches you should get a kgdb that can debug > > i386 cores on amd64 and vice versa. > > > > All of the targets that the native devel/gdb support have their backends > > ported (so x86, sparc64, powerpc and powerpc64). I have not yet ported > > arm or mips since those don't work for userland yet in upstream gdb. I > > have only compiled non-x86 backends. Testing of the new kgdb on sparc64 > > and powerpc would be appreciated. > > > > Steps: > > > > % git clone https://github.com/bsdjhb/gdb.git > > % git checkout freebsd-7.9.1-kgdb > > % fetch http://www.freebsd.org/~jhb/gdb/build > > % pkg install devel/gdb > > > > # Having gdb installed will mean you get the python bindings in the right > > # place. > > > > % pkg install gmake > > > > # I think this is the only build tool you need? > > > > % ./build > > % cd obj > > > > # Replace 'obj' with 'obj.' for all but amd64 > > > > % gmake > > > > # ... wait > > > > You will now have a binary at 'obj/gdb/kgdb'. I just run it from my obj > > tree currently when testing. Once it becomes part of the port it will get > > installed as /usr/local/bin/kgdb791 or some such. > > John, > > first of all, thank you very much for this! > > I followed your instructions substituting freebsd-7.10-kgdb for > freebsd-7.9.1-kgdb branch (devel/gdb is also at version 7.10) and the build > process worked just fine. > However, when I try to use the new kgdb it works, but I get some annoying > diagnostics: > > ... Andriy, The patch is also available in D3727. I downloaded the raw diff from there, applied it to $PORTS/devel/gdb, and built it as a port (with the KGDB support option enabled of course). Everything works. Can you try that? https://reviews.freebsd.org/D3727 Regards, Navdeep ___ freebsd-current@freebsd.org mailing list https://lists.freebsd.org/mailman/listinfo/freebsd-current To unsubscribe, send any mail to "freebsd-current-unsubscr...@freebsd.org"
Re: kgdb ported to devel/gdb
On 01/09/2015 00:32, John Baldwin wrote: > Over the past several months I have ported kgdb to the version of gdb in > ports. > I have a pending patch to the gdb port to add fork following, but once that is > done (and possibly after updating to 7.10) I will try to add my existing work > as a KGDB option on the port. Until such time, you can try the newer kgdb by > checking out my branch from git. > > Here's my cheat sheet on how to build the newer kgdb. Note that if you build > a world with my cross-libkvm patches you should get a kgdb that can debug > i386 cores on amd64 and vice versa. > > All of the targets that the native devel/gdb support have their backends > ported (so x86, sparc64, powerpc and powerpc64). I have not yet ported > arm or mips since those don't work for userland yet in upstream gdb. I > have only compiled non-x86 backends. Testing of the new kgdb on sparc64 > and powerpc would be appreciated. > > Steps: > > % git clone https://github.com/bsdjhb/gdb.git > % git checkout freebsd-7.9.1-kgdb > % fetch http://www.freebsd.org/~jhb/gdb/build > % pkg install devel/gdb > > # Having gdb installed will mean you get the python bindings in the right > # place. > > % pkg install gmake > > # I think this is the only build tool you need? > > % ./build > % cd obj > > # Replace 'obj' with 'obj.' for all but amd64 > > % gmake > > # ... wait > > You will now have a binary at 'obj/gdb/kgdb'. I just run it from my obj > tree currently when testing. Once it becomes part of the port it will get > installed as /usr/local/bin/kgdb791 or some such. John, first of all, thank you very much for this! I followed your instructions substituting freebsd-7.10-kgdb for freebsd-7.9.1-kgdb branch (devel/gdb is also at version 7.10) and the build process worked just fine. However, when I try to use the new kgdb it works, but I get some annoying diagnostics: (kgdb) bt Python Exception Installation error: gdb.execute_unwinders function is missing: Python Exception No module named gdb.frames: #0 doadump (textdump=1) at /usr/src/sys/kern/kern_shutdown.c:291 #1 0x8063453f in kern_reboot (howto=260) at /usr/src/sys/kern/kern_shutdown.c:359 Python Exception Installation error: gdb.execute_unwinders function is missing: Python Exception Installation error: gdb.execute_unwinders function is missing: #2 0x80634ba4 in vpanic (fmt=, ap=) at /usr/src/sys/kern/kern_shutdown.c:635 Python Exception Installation error: gdb.execute_unwinders function is missing: #3 0x806348a3 in panic (fmt=) at /usr/src/sys/kern/kern_shutdown.c:568 Python Exception Installation error: gdb.execute_unwinders function is missing: #4 0x8041bba7 in db_panic (addr=, have_addr=, count=, modif=) at /usr/src/sys/ddb/db_command.c:473 Python Exception Installation error: gdb.execute_unwinders function is missing: #5 0x8041b67b in db_command (last_cmdp=, cmd_table=0x0, dopager=) at /usr/src/sys/ddb/db_command.c:440 #6 0x8041b524 in db_command_loop () at /usr/src/sys/ddb/db_command.c:493 Python Exception Installation error: gdb.execute_unwinders function is missing: #7 0x8041de0b in db_trap (type=, code=) at /usr/src/sys/ddb/db_main.c:251 Python Exception Installation error: gdb.execute_unwinders function is missing: Python Exception Installation error: gdb.execute_unwinders function is missing: #8 0x80669de8 in kdb_trap (type=19, code=0, tf=0x80f976d0 ) at /usr/src/sys/kern/subr_kdb.c:653 Python Exception Installation error: gdb.execute_unwinders function is missing: #9 0x80820d26 in trap (frame=0x80f976d0 ) at /usr/src/sys/amd64/amd64/trap.c:381 #10 0x80809623 in nmi_calltrap () at /usr/src/sys/amd64/amd64/exception.S:514 Python Exception Installation error: gdb.execute_unwinders function is missing: #11 0x80619e1f in __mtx_assert (c=, what=, file=, line=) at /usr/src/sys/kern/kern_mutex.c:842 Backtrace stopped: previous frame inner to this frame (corrupt stack?) Did I miss something? Thanks! -- Andriy Gapon ___ freebsd-current@freebsd.org mailing list https://lists.freebsd.org/mailman/listinfo/freebsd-current To unsubscribe, send any mail to "freebsd-current-unsubscr...@freebsd.org"
