src-test/sys/cddl/dev/dtrace/dtrace_unload.c, branch main

MFV r266993:

2015-02-03T19:39:53Z

4469 DTrace helper tracing should be dynamic Reference: https://illumos.org/issues/4469 Obtained from: Illumos Phabric: D1551 Reviewed by: markj MFC after: 2 weeks

Continue the crusade towards a dev_clone()-free kernel, removing its

2014-06-25T03:54:02Z

usage from dtrace. The dtrace code already uses cdevpriv(9) since FreeBSD 8, so this change should be quite harmless. Reviewed by: markj Approved by: markj MFC after: never

Revert r260091. The vmem calls seem to be slower than the *_unr() calls that

2013-12-31T15:37:51Z

they replaced, which is important considering that probe IDs are allocated during process startup for USDT probes.

Now that vmem(9) is available, use vmem arenas to allocate probe and

2013-12-30T17:37:32Z

aggregation IDs, as is done in the upstream illumos code. This still requires some FreeBSD-specific code, as our vmem API is not identical to the one in illumos. Submitted by: Mike Ma

Initialize and free the DTrace taskqueue in the dtrace module load/unload

2013-10-08T12:56:46Z

handlers rather than in the dtrace device open/close methods. The current approach can cause a panic if the device is closed which the taskqueue thread is active, or if a kernel module containing a provider is unloaded while retained enablings are present and the dtrace device isn't opened. Submitted by: gibbs (original version) Reviewed by: gibbs Approved by: re (glebius) MFC after: 2 weeks

Rename the kld_unload event handler to kld_unload_try, and add a new

2013-08-24T21:13:38Z

kld_unload event handler which gets invoked after a linker file has been successfully unloaded. The kld_unload and kld_load event handlers are now invoked with the shared linker lock held, while kld_unload_try is invoked with the lock exclusively held. Convert hwpmc(4) to use these event handlers instead of having kern_kldload() and kern_kldunload() invoke hwpmc(4) hooks whenever files are loaded or unloaded. This has no functional effect, but simplifes the linker code somewhat. Reviewed by: jhb

Use kld_{load,unload} instead of mod_{load,unload} for the linker file load

2013-08-14T00:42:21Z

and unload event handlers added in r254266. Reported by: jhb X-MFC with: r254266

FreeBSD's DTrace implementation has a few problems with respect to handling

2013-08-13T03:10:39Z

probes declared in a kernel module when that module is unloaded. In particular, * Unloading a module with active SDT probes will cause a panic. [1] * A module's (FBT/SDT) probes aren't destroyed when the module is unloaded; trying to use them after the fact will generally cause a panic. This change fixes both problems by porting the DTrace module load/unload handlers from illumos and registering them with the corresponding EVENTHANDLER(9) handlers. This allows the DTrace framework to destroy all probes defined in a module when that module is unloaded, and to prevent a module unload from proceeding if some of its probes are active. The latter problem has already been fixed for FBT probes by checking lf->nenabled in kern_kldunload(), but moving the check into the DTrace framework generalizes it to all kernel providers and also fixes a race in the current implementation (since a probe may be activated between the check and the call to linker_file_unload()). Additionally, the SDT implementation has been reworked to define SDT providers/probes/argtypes in linker sets rather than using SYSINIT/SYSUNINIT to create and destroy SDT probes when a module is loaded or unloaded. This simplifies things quite a bit since it means that pretty much all of the SDT code can live in sdt.ko, and since it becomes easier to integrate SDT with the DTrace framework. Furthermore, this allows FreeBSD to be quite flexible in that SDT providers spanning multiple modules can be created on the fly when a module is loaded; at the moment it looks like illumos' SDT implementation requires all SDT probes to be statically defined in a single kernel table. PR: 166927, 166926, 166928 Reported by: davide [1] Reviewed by: avg, trociny (earlier version) MFC after: 1 month

opensolaris code: translate INVARIANTS to DEBUG and ZFS_DEBUG

2013-08-06T15:51:56Z

Do this by forcing inclusion of sys/cddl/compat/opensolaris/sys/debug_compat.h via -include option into all source files from OpenSolaris. Note that this -include option must always be after -include opt_global.h. Additionally, remove forced definition of DEBUG for some modules and fix their build without DEBUG. Also, meaning of DEBUG was overloaded to enable WITNESS support for some OpenSolaris (primarily ZFS) locks. Now this overloading is removed and that use of DEBUG is replaced with a new option OPENSOLARIS_WITNESS. MFC after: 17 days

Hide references to mod_lock. In FreeBSD it is always acquired with the

2013-07-05T22:42:10Z

provider lock held, so its use has no effect.