USDT probes are advertised to kernel by initialization code with
atrribute((constructor))). It seems that on Solaris the .init-ish code
of the main object is executed before RD_PREINIT point is hit. On
FreeBSD that is not the case. And because on FreeBSD there is no other
well-defined point between RD_PREINIT and main() we have to parse a
DTrace script when main is hit, for time being.
A footnote: currently we actually post RD_POSTINIT event, but that's a
bug because the event is triggered by hitting r_debug_state which
happens before any init code is executed.
Reported by: markj
snapshot.
Related illumos ZFS issue:
3699 zfs hold or release of a non-existent snapshot does not output error
Reported by: Steven Hartland <smh@FreeBSD.org>
MFC after: 3 days
The following change from illumos brought caused DTrace to
pause in an interactive environment:
3026 libdtrace should set LD_NOLAZYLOAD=1 to help the pid provider
This was not detected during testing because it doesn't
affect scripts.
We shouldn't be changing the environment, especially since the
LD_NOLAZYLOAD option doesn't apply to our (GNU) ld.
Unfortunately the change from upstream was made in such a way
that it is very difficult to separate this change from the
others so, at least for now, it's better to just revert
everything.
Reference:
https://www.illumos.org/issues/3026
Reported by: Navdeep Parhar and Mark Johnston
Merge changes from illumos:
3675 DTrace print() should try to resolve function pointers
3676 dt_print_enum hardcodes a value of zero
Illumos Revision: b1fa6326238973aeaf12c34fcda75985b6c06be1
Reference:
https://www.illumos.org/issues/3675https://www.illumos.org/issues/3676
Obtained from: Illumos
MFC after: 1 month
Merge change from illumos:
1731 DTrace NFS translators should be split into client/server pieces
Illumos Revision: 13523:6763769941d2
This code seems to be currently unused on FreeBSD.
Reference:
https://www.illumos.org/issues/1731
Obtained from: Illumos
MFC after: 1 week
Merge changes from illumos:
3021 option for time-ordered output from dtrace(1M)
3022 DTrace: keys should not affect the sort order when sorting by value
3023 it should be possible to dereference dynamic variables
3024 D integer narrowing needs some work
3025 register leak in D code generation
3026 libdtrace should set LD_NOLAZYLOAD=1 to help the pid provider
This brings yet another feature implemented in upstream DTrace.
A complete description is available here:
http://dtrace.org/blogs/ahl/2012/07/28/my-new-dtrace-favorite/
This change bumps the DT_VERS_* number to 1.9.1 in
accordance to what is done in illumos.
This change was somewhat complicated because upstream is mixed many
changes in an individual commit and some of the tests don't really
apply to us.
There are also appear to be differences in timestamping with Solaris
so we had to workaround some assertions making sure no regression
happened.
Special thanks to Fabian Keil for changes and testing.
Illumos Revisions: 13758:23432da34147
Reference:
https://www.illumos.org/issues/3021https://www.illumos.org/issues/3022https://www.illumos.org/issues/3023https://www.illumos.org/issues/3024https://www.illumos.org/issues/3025https://www.illumos.org/issues/1694
Tested by: Fabian Keil
Obtained from: Illumos
MFC after: 1 months
release a non-existing snapshot of a existing dataset. In recursive case
error is reported if no snapshots with the requested name have been found.
Problem and proposed solution reported to illumos:
3699 zfs hold or release of a non-existent snapshot does not output error
MFC after: 8 days
doesn't copyout in this case.
To solve this issue a new struct zfs_iocparm_t is introduced consisting of:
- zfs_ioctl_version (future backwards compatibility purposes)
- user space pointer to zfs_cmd_t (copyin and copyout)
- size of zfs_cmd_t (verification purposes)
The copyin and copyout of zfs_cmd_t is now done the illumos (vendor) way
what makes porting of new changes easier and ensures correct behavior if
returning an error.
MFC after: 10 days
Merge change from vendor to reduce diff only.
ZFS dtrace probes are not supported on FreeBSD yet.
Illumos ZFS issues:
3598 want to dtrace when errors are generated in zfs
MFC after: 3 weeks
only other case where STT_FILE symbols are used, in symit_next() in
cddl/contrib/opensolaris/tools/ctf/cvt/input.c, save the basename of the
symbol, instead of the full pathname.
Reported by: avg
Tested by: avg, jimharris
MFC after: 1 week
Merge change from illumos:
1368 enablings on defunct providers prevent providers from unregistering
We try to address some underlying differences between the Solaris
and FreeBSD implementations: dtrace_attach() / dtrace_detach() are
currently unimplemented in FreeBSD but the new code from illumos
makes use of taskq so some adaptations were made to dtrace_open()
and dtrace_close() to handle them appropriately.
Illumos Revision: r13430:8e6add739e38
Reference:
https://www.illumos.org/issues/1368
Reviewed by: gnn
Tested by: Fabian Keil
Obtained from: Illumos
MFC after: 3 weeks
for and loading dependent modules. This addresses a bug seen with
io.d where it was being doubly included.
PR: 171678
Submitted by: Mark Johnston
MFC after: 2 weeks
Merge change from illumos:
1694 Add type-aware print() action
This is a very nice feature implemented in upstream Dtrace.
A complete description is available here:
http://dtrace.org/blogs/eschrock/2011/10/26/your-mdb-fell-into-my-dtrace/
This change bumps the DT_VERS_* number to 1.9.0 in
accordance to what is done in illumos.
While here also include some minor cleanups to ease further merging
and appease clang with a fix by Fabian Keil.
Illumos Revisions: 13501:c3a7090dbc16
13483:f413e6c5d297
Reference:
https://www.illumos.org/issues/1560https://www.illumos.org/issues/1694
Tested by: Fabian Keil
Obtained from: Illumos
MFC after: 1 month
Merge changes from illumos:
1451 DTrace needs toupper()/tolower() subroutines
1457 lltostr() D subroutine should take an optional base
This change bumps the DT_VERS_* number to 1.8.1 in
accordance to what is done in illumos.
The test suite we currently include is outdated and
doesnt support some updates in tst.subr.d which had to
be left out for now.
Illumos Revisions: r13458 5e394d8db762
r13459 c3454574dd1a
Reference:
https://www.illumos.org/issues/1451https://www.illumos.org/issues/1457
Tested by: Fabian Keil
Obtained from: Illumos
MFC after: 1 month
Merge change from illumos:
1455 DTrace tracemem() should take an optional size argument
Our local enhancements to dt_print_bytes were equivalent to
those in illumos but we made it match the illumos version
to ease further code merges.
For now leave out tst.smallsize.d and tst.smallsize.d.out
since those don't seem to work cleanly on FreeBSD.
This change bumps the DT_VERS_* number to 1.7.1 in accordance
to what is done in illumos.
Illumos Revision: 13457:571b0355c2e3
Reference:
https://www.illumos.org/issues/1455
Tested by: Fabian Keil
Obtained from: Illumos
MFC after: 1 month
It is not guaranteed that a program has a symbol table entry for main
and thus that it would be possible to set a breakpoint on it.
Reviewed by: rpaulo
Discussed with: rpaulo
MFC after: 13 days
includes MFV 238590, 238592, 247580
MFV 238590, 238592:
In the first zfs ioctl restructuring phase, the libzfs_core library was
introduced. It is a new thin library that wraps around kernel ioctl's.
The idea is to provide a forward-compatible way of dealing with new
features. Arguments are passed in nvlists and not random zfs_cmd fields,
new-style ioctls are logged to pool history using a new method of
history logging.
http://blog.delphix.com/matt/2012/01/17/the-future-of-libzfs/
MFV 247580 [1]:
To address issues of several deadlocks and race conditions the locking
code around dsl_dataset was rewritten and the interface to synctasks
was changed.
User-Visible Changes:
"zfs snapshot" can create more arbitrary snapshots at once (atomically)
"zfs destroy" destroys multiple snapshots at once
"zfs recv" has improved performance
Backward Compatibility:
I have extended the compatibility layer to support full backward
compatibility by remapping or rewriting the responsible ioctl arguments.
Old utilities are fully supported by the new kernel module.
Forward Compatibility:
New utilities work with old kernels with the following restrictions:
- creating, destroying, holding and releasing of multiple snapshots
at once is not supported, this includes recursive (-r) commands
Illumos ZFS issues:
2882 implement libzfs_core
2900 "zfs snapshot" should be able to create multiple,
arbitrary snapshots at once
3464 zfs synctask code needs restructuring
References:
https://www.illumos.org/issues/2882https://www.illumos.org/issues/2900https://www.illumos.org/issues/3464 [1]
MFC after: 1 month
Sponsored by: Hybrid Logic Inc. [1]
- provide complete backwards compatibility (old utility, new kernel)
- add zfs_cmd_t compatibility mapping in both directions
- determine ioctl address in zfs_ioctl_compat.c
Import minor ZFS changes from vendor
Illumos ZFS issues:
3604 zdb should print bpobjs more verbosely (fix zdb hang)
3606 zpool status -x shouldn't warn about old on-disk format
MFC after: 3 days
puts the full original source filename in the STT_FILE entry of the ELF
symbol table, while gcc saves only the basename.
Since the DWARF DW_AT_name attribute contains the full source filename,
both for clang and gcc, ctfconvert takes just the basename of it, for
matching with the STT_FILE entry. So when attempting to match with such
an entry, use its basename, if necessary.
Reported by: avg
MFC after: 1 week
Merge new read-only zfs properties from vendor (illumos)
Illumos ZFS issues:
3588 provide zfs properties for logical (uncompressed) space used and
referenced
References:
https://www.illumos.org/issues/3588
MFC after: 2 weeks
in r247265 (ZFS deadman thread). Both new utilities now support the old
kernel and new kernel properly detects old utilities.
For future backwards compatibility, the vfs.zfs.version.ioctl read-only
sysctl has been introduced. With this sysctl zfs utilities will be able
to detect the ioctl interface version of the currently loaded zfs module.
As a side effect, the zfs utilities between r247265 and this revision don't
support the old kernel module. If you are using HEAD newer or equal than
r247265, install the new kernel module (or whole kernel) first.
MFC after: 10 days
Merge the ZFS I/O deadman thread from vendor (illumos).
This feature panics the system on hanging ZFS I/O, helps debugging
and resumes failed service.
The panic behavior can be controlled with the loader-only tunables:
vfs.zfs.deadman_enabled (enable or disable panic on stalled ZFS I/O)
vfs.zfs.deadman_synctime (expiration time for stalled ZFS I/O)
By default, ZFS I/O deadman is enabled by default on amd64 and i386
excluding virtual guest machines.
Illumos ZFS issues:
3246 ZFS I/O deadman thread
References:
https://www.illumos.org/issues/3246
MFC after: 2 weeks
kernel. Properly restore, continue, and detach from processes
being DTraced when DTrace exits with an error so the program
being inspected is not terminated.
cddl/contrib/opensolaris/cmd/dtrace/dtrace.c:
In fatal(), the generic error handler, close the DTrace
handle as is done in the "probe/script" error handler
dfatal(). fatal() can be invoked after DTrace attaches
to processes (e.g. a script specified by command line
argument can't be found) and closing the handle will
release them.
Submitted by: Spectra Logic Corporation
Reviewed by: rpaulo, gnn
