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e8967c8bd9
freebsd-skq/sys/kern
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markj e8967c8bd9 Add stack_save_td_running(), a function to trace the kernel stack of a 
running thread.

It is currently implemented only on amd64 and i386; on these
architectures, it is implemented by raising an NMI on the CPU on which
the target thread is currently running. Unlike stack_save_td(), it may
fail, for example if the thread is running in user mode.

This change also modifies the kern.proc.kstack sysctl to use this function,
so that stacks of running threads are shown in the output of "procstat -kk".
This is handy for debugging threads that are stuck in a busy loop.

Reviewed by:	bdrewery, jhb, kib
Sponsored by:	EMC / Isilon Storage Division
Differential Revision:	https://reviews.freebsd.org/D3256
2015-09-11 03:54:37 +00:00
..
bus_if.m Add a bus method to fetch the VM domain for the given device/bus. 2014-10-09 05:33:25 +00:00
capabilities.conf Add futimens and utimensat system calls. 2015-01-23 21:07:08 +00:00
clock_if.m
cpufreq_if.m
device_if.m Change the default method for device_quiesce() to return 0 instead of 2015-01-08 21:46:28 +00:00
genassym.sh genassym.sh: call nm(1) with NMFLAGS. 2015-08-14 22:57:13 +00:00
imgact_aout.c Implement lockless resource limits. 2015-06-10 10:48:12 +00:00
imgact_binmisc.c At the suggestion of jhb, replace atomic_set/clear calls with use of 2015-06-24 15:52:26 +00:00
imgact_elf32.c
imgact_elf64.c
imgact_elf.c Follow-up to r287442: Move sysctl to compiled-once file 2015-09-07 16:44:28 +00:00
imgact_gzip.c Implement lockless resource limits. 2015-06-10 10:48:12 +00:00
imgact_shell.c Allow multiple image activators to run on the same execution by changing 2014-09-04 21:31:25 +00:00
inflate.c
init_main.c Remove now obsolete comment. 2015-08-28 20:06:58 +00:00
init_sysent.c Add an initial NUMA affinity/policy configuration for threads and processes. 2015-07-11 15:21:37 +00:00
kern_acct.c
kern_alq.c Prevent alq from panic when the invalid alq_file path specified. 2014-04-05 16:54:47 +00:00
kern_clock.c Initialize ticks so that it wraps 10 minutes after boot to increase the 2015-02-05 01:43:21 +00:00
kern_clocksource.c Fix typo in comment. 2015-07-20 09:37:42 +00:00
kern_condvar.c Revert r282971. It depends on condvar consumers not destroying condvars 2015-05-21 16:43:26 +00:00
kern_conf.c Fix for out of order device destruction notifications when using the 2015-03-22 13:11:56 +00:00
kern_cons.c CALLOUT_MPSAFE has lost its meaning since r141428, i.e., for more than ten 2015-05-22 17:05:21 +00:00
kern_context.c
kern_cpu.c Pull in r267961 and r267973 again. Fix for issues reported will follow. 2014-06-28 03:56:17 +00:00
kern_cpuset.c Un-static cpuset_which() - it's useful in other contexts, such as some 2015-06-26 04:14:05 +00:00
kern_ctf.c Don't specify a resid parameter if we're just going to ignore it. Instead, 2015-02-20 20:49:00 +00:00
kern_descrip.c fd: make rights a mandatory argument to fgetvp_rights 2015-09-07 20:05:56 +00:00
kern_dtrace.c Commit the rest of the changes that were intended to be part of r266826. 2014-05-29 01:42:22 +00:00
kern_dump.c Factor out duplicated code from dumpsys() on each architecture into generic 2015-01-07 01:01:39 +00:00
kern_environment.c Test if 'env' is NULL before doing memset() and strlen(), 2014-10-23 18:23:50 +00:00
kern_et.c Trivial change / forced-commit to document prior change that slipped in 2015-03-16 19:29:19 +00:00
kern_event.c Exit notification for EVFILT_PROC removes knote from the knlist. In 2015-09-01 14:05:29 +00:00
kern_exec.c Follow-up to r287442: Move sysctl to compiled-once file 2015-09-07 16:44:28 +00:00
kern_exit.c When the wait*(2) syscalls wait for any process (P_ALL), they should 2015-08-12 20:08:54 +00:00
kern_fail.c Use a regular sbuf + SYSCTL_OUT() rather than sbuf_new_for_sysctl() with 2015-03-16 19:18:45 +00:00
kern_ffclock.c The SYSCTL data pointers can come from userspace and must not be 2014-10-28 12:00:39 +00:00
kern_fork.c Make kstack_pages a tunable on arm, x86, and powepc. On i386, the 2015-08-10 17:18:21 +00:00
kern_gzio.c Move zlib.c from net to libkern. 2015-04-22 14:38:58 +00:00
kern_hhook.c
kern_idle.c
kern_intr.c The part of r285680 which removed release semantic for two stores to 2015-07-21 14:39:34 +00:00
kern_jail.c Add support to the jail framework to be able to mount linsysfs(5) and 2015-07-19 08:52:35 +00:00
kern_khelp.c
kern_kthread.c Limit rights on process descriptors. 2015-07-31 10:21:58 +00:00
kern_ktr.c Expand ktr_mask to be a 64-bit unsigned integer. 2015-05-22 11:09:41 +00:00
kern_ktrace.c Pull in r267961 and r267973 again. Fix for issues reported will follow. 2014-06-28 03:56:17 +00:00
kern_linker.c Revert r285125 until rmlocks get fixed. 2015-07-30 19:52:43 +00:00
kern_lock.c Don't modify curthread->td_locks unless INVARIANTS is enabled. 2015-08-02 00:03:08 +00:00
kern_lockf.c Improve style and fix a possible use-after-free case introduced in r268384 2015-01-10 06:48:35 +00:00
kern_lockstat.c Consistently use a reader/writer flag for lockstat probes in rwlock(9) and 2015-07-19 22:24:33 +00:00
kern_loginclass.c cred: add proc_set_cred helper 2015-03-16 00:10:03 +00:00
kern_malloc.c The vmem callback to reclaim kmem arena address space on low or 2015-05-09 20:08:36 +00:00
kern_mbuf.c Fix integer truncation bug in malloc(9) 2015-04-01 12:42:26 +00:00
kern_mib.c Huge cleanup of random(4) code. 2015-06-30 17:00:45 +00:00
kern_module.c
kern_mtxpool.c Garbage collect mtxpool_lockbuilder, the mutex pool historically used 2014-05-02 07:57:40 +00:00
kern_mutex.c Don't modify curthread->td_locks unless INVARIANTS is enabled. 2015-08-02 00:03:08 +00:00
kern_ntptime.c Use the monotonic (uptime) counter rather than time-of-day to measure elapsed 2015-07-12 18:38:17 +00:00
kern_numa.c Add an initial NUMA affinity/policy configuration for threads and processes. 2015-07-11 15:21:37 +00:00
kern_osd.c Pull in r267961 and r267973 again. Fix for issues reported will follow. 2014-06-28 03:56:17 +00:00
kern_physio.c Rewrite physio() to not allocate pbufs for unmapped I/O. 2015-04-21 10:55:53 +00:00
kern_pmc.c Pull in r267961 and r267973 again. Fix for issues reported will follow. 2014-06-28 03:56:17 +00:00
kern_poll.c When a kernel has DEVICE_POLLING turned on but no drivers have 2015-04-14 14:22:34 +00:00
kern_priv.c Pull in r267961 and r267973 again. Fix for issues reported will follow. 2014-06-28 03:56:17 +00:00
kern_proc.c Add stack_save_td_running(), a function to trace the kernel stack of a 2015-09-11 03:54:37 +00:00
kern_procctl.c If process becomes reaper (procctl(PROC_REAP_ACQUIRE)) while already 2015-08-20 22:44:26 +00:00
kern_prot.c Get rid of lim_update_thread and cred_update_thread. 2015-07-16 14:30:11 +00:00
kern_racct.c nit: Rename racct_alloc_resource to racct_adjust_resource. 2015-06-14 08:33:14 +00:00
kern_rangelock.c
kern_rctl.c Add kern.racct.enable tunable and RACCT_DISABLED config option. 2015-04-29 10:23:02 +00:00
kern_resource.c Get rid of lim_update_thread and cred_update_thread. 2015-07-16 14:30:11 +00:00
kern_rmlock.c Don't modify curthread->td_locks unless INVARIANTS is enabled. 2015-08-02 00:03:08 +00:00
kern_rwlock.c Don't modify curthread->td_locks unless INVARIANTS is enabled. 2015-08-02 00:03:08 +00:00
kern_sdt.c Print a backtrace if the SDT(9) stub gets called so that there's at least 2014-02-22 01:41:45 +00:00
kern_sema.c
kern_sharedpage.c Copy the fencing of the algorithm to do lock-less update and reading 2015-08-04 12:33:51 +00:00
kern_shutdown.c - Make 'struct buf *buf' private to vfs_bio.c. Having a global variable 2015-07-29 02:26:57 +00:00
kern_sig.c Unignore signals when starting CloudABI processes. 2015-08-12 11:30:31 +00:00
kern_switch.c Revert for r277213: 2015-01-22 11:12:42 +00:00
kern_sx.c Don't modify curthread->td_locks unless INVARIANTS is enabled. 2015-08-02 00:03:08 +00:00
kern_synch.c Remove several write-only variables, all reported by the gcc 4.9 2015-05-29 13:24:17 +00:00
kern_syscalls.c Implement lockless resource limits. 2015-06-10 10:48:12 +00:00
kern_sysctl.c Revert r285125 until rmlocks get fixed. 2015-07-30 19:52:43 +00:00
kern_tc.c If a specific timecounter has been chosen via sysctl, and a new timecounter 2015-08-12 20:50:20 +00:00
kern_thr.c Add an API for easily creating userspace threads in kernelspace. 2015-07-20 10:20:04 +00:00
kern_thread.c Get rid of lim_update_thread and cred_update_thread. 2015-07-16 14:30:11 +00:00
kern_time.c Fix an off by one in ppsratecheck(). If you asked for N=1 you'd get one, 2015-01-11 20:48:29 +00:00
kern_timeout.c callout_reset: fix a reversed check for cc_exec_cancel 2015-09-01 09:27:14 +00:00
kern_umtx.c Fix bad arithmetic in umtx_key_get() to compute object offset. 2015-08-04 06:01:13 +00:00
kern_uuid.c Fix a bug in be_uuid_dec(); it called le16dec() instead of be16dec(), 2014-02-13 22:24:36 +00:00
kern_xxx.c
ksched.c Use P1B_PRIO_MAX to designate max posix priority for the RR/FIFO 2015-08-30 18:02:57 +00:00
link_elf_obj.c Move zlib.c from net to libkern. 2015-04-22 14:38:58 +00:00
link_elf.c preload_search_info: make sure mod is set 2015-08-21 15:57:57 +00:00
linker_if.m
Make.tags.inc Remove AppleTalk support. 2014-03-14 06:29:43 +00:00
Makefile
makesyscalls.sh Import the CloudABI datatypes and create a system call table. 2015-07-09 07:20:15 +00:00
md4c.c
md5c.c
p1003_1b.c In preparation for switching linuxulator to the use the native 1:1 2015-05-24 14:44:06 +00:00
posix4_mib.c
sched_4bsd.c kgdb uses td_oncpu to determine if a thread is running and should use 2015-08-03 20:43:36 +00:00
sched_ule.c Summary: Add the interactivity equations to the header comment for our 2015-08-26 16:36:41 +00:00
serdev_if.m
stack_protector.c Use nitems() macro instead of __arraycount() 2015-06-16 20:19:00 +00:00
subr_acl_nfs4.c Expose an interface to determine if an ACE is inherited. 2015-09-04 00:14:20 +00:00
subr_acl_posix1e.c
subr_autoconf.c
subr_blist.c
subr_bufring.c
subr_bus_dma.c
subr_bus.c Huge cleanup of random(4) code. 2015-06-30 17:00:45 +00:00
subr_busdma_bufalloc.c Fix integer truncation bug in malloc(9) 2015-04-01 12:42:26 +00:00
subr_capability.c Remove duplicated includes. 2014-06-26 13:57:44 +00:00
subr_clock.c For architectures where time_t is wide enough, in particular, 64bit 2014-12-12 09:37:18 +00:00
subr_counter.c Create two public UMA_ZONE_PCPU zones: 64 bit sized and pointer sized. 2014-02-10 19:59:46 +00:00
subr_devstat.c Fix multiple incorrect SYSCTL arguments in the kernel: 2014-10-21 07:31:21 +00:00
subr_disk.c
subr_dummy_vdso_tc.c Update the vdso timehands only via tc_windup(). 2015-01-20 03:54:30 +00:00
subr_eventhandler.c
subr_fattime.c Where appropriate, use the modern terms for the one true time base 2014-12-21 05:07:11 +00:00
subr_firmware.c Create a dedicated function for ensuring that cdir and rdir are populated. 2015-07-11 16:22:48 +00:00
subr_hash.c
subr_hints.c Add a new device control utility for new-bus devices called devctl. This 2015-02-06 16:09:01 +00:00
subr_kdb.c Fix multiple incorrect SYSCTL arguments in the kernel: 2014-10-21 07:31:21 +00:00
subr_kobj.c
subr_lock.c Add _NEW flag to mtx(9), sx(9), rmlock(9) and rwlock(9). 2014-12-13 21:00:10 +00:00
subr_log.c
subr_mbpool.c All mbuf external free functions never fail, so let them be void. 2014-07-11 13:58:48 +00:00
subr_mchain.c
subr_module.c preload_search_info: make sure mod is set 2015-08-21 15:57:57 +00:00
subr_msgbuf.c Pull in r267961 and r267973 again. Fix for issues reported will follow. 2014-06-28 03:56:17 +00:00
subr_param.c Also make kern.maxfilesperproc a boot time tunable. 2015-09-10 04:05:58 +00:00
subr_pcpu.c Create two public UMA_ZONE_PCPU zones: 64 bit sized and pointer sized. 2014-02-10 19:59:46 +00:00
subr_pctrie.c
subr_power.c
subr_prf.c Add support for reading MAM attributes to camcontrol(8) and libcam(3). 2015-06-09 21:39:38 +00:00
subr_prof.c The process spin lock currently has the following distinct uses: 2014-11-26 14:10:00 +00:00
subr_rman.c Nuke the never-used RF_TIMESHARE feature, reducing the complexity of the 2014-07-16 22:18:19 +00:00
subr_rtc.c
subr_sbuf.c The minimum sbuf buffer size is 2 bytes (a byte plus a nulterm), assert that. 2015-03-17 21:00:31 +00:00
subr_scanf.c
subr_sfbuf.c Move KASSERT into locked region. 2014-08-11 15:06:07 +00:00
subr_sglist.c Fix a couple of panics when detaching from a cxgbe/cxl interface that was 2015-01-26 16:26:28 +00:00
subr_sleepqueue.c Revert for r277213: 2015-01-22 11:12:42 +00:00
subr_smp.c The smp_rendezvous_cpus() function should ensure that all accesses 2015-07-21 22:56:46 +00:00
subr_stack.c
subr_syscall.c The 'sa' argument to syscallret() is not unused. 2015-09-01 22:28:23 +00:00
subr_taskqueue.c MFuser/delphij/zfs-arc-rebase@r281754: 2015-05-26 01:40:33 +00:00
subr_terminal.c vt(4): Adjust the cursor position after changing the window size 2014-11-01 17:05:15 +00:00
subr_trap.c racct: perform a lockless check for p_throttled 2015-07-13 22:52:11 +00:00
subr_turnstile.c ddb: finish converting boolean values. 2015-05-21 15:16:18 +00:00
subr_uio.c Implement lockless resource limits. 2015-06-10 10:48:12 +00:00
subr_unit.c
subr_vmem.c CALLOUT_MPSAFE has lost its meaning since r141428, i.e., for more than ten 2015-05-22 17:05:21 +00:00
subr_witness.c o Revert the other functional half of r239864, i. e. the merge of r134227 2015-07-24 15:13:21 +00:00
sys_capability.c Introduce kern_cap_rights_limit(). 2015-08-11 08:43:50 +00:00
sys_generic.c Cover a race between doselwakeup() and selfdfree(). If doselwakeup() 2015-07-09 09:22:21 +00:00
sys_pipe.c Make pipes in CloudABI work. 2015-07-29 17:18:27 +00:00
sys_procdesc.c The si_status field of the siginfo_t, provided by the waitid(2) and 2015-07-18 09:02:50 +00:00
sys_process.c Export current system call code and argument count for system call entry 2015-09-01 22:24:54 +00:00
sys_socket.c In preparation of merging projects/sendfile, transform bare access to 2014-11-12 09:57:15 +00:00
syscalls.c Regenerate syscalls. 2015-07-11 15:22:11 +00:00
syscalls.master Regenerate syscalls. 2015-07-11 15:22:11 +00:00
systrace_args.c Regenerate syscalls. 2015-07-11 15:22:11 +00:00
sysv_ipc.c
sysv_msg.c Add kern.racct.enable tunable and RACCT_DISABLED config option. 2015-04-29 10:23:02 +00:00
sysv_sem.c Add kern.racct.enable tunable and RACCT_DISABLED config option. 2015-04-29 10:23:02 +00:00
sysv_shm.c sysvshm: fix up some whitespace issues and spurious initialisation 2015-07-02 19:14:30 +00:00
tty_compat.c
tty_info.c
tty_inq.c
tty_outq.c
tty_pts.c Implement lockless resource limits. 2015-06-10 10:48:12 +00:00
tty_tty.c tty: replace several curthread->td_proc with stored curproc 2015-07-06 18:53:56 +00:00
tty_ttydisc.c
tty.c filedesc: simplify fget_unlocked & friends 2015-02-17 23:54:06 +00:00
uipc_accf.c The accept filter code is not specific to the FreeBSD IPv4 network stack, 2014-07-26 19:27:34 +00:00
uipc_debug.c Fix sb_state constant names as used e.g. to display in DDB ``show sockbuf''. 2015-07-21 09:57:13 +00:00
uipc_domain.c CALLOUT_MPSAFE has lost its meaning since r141428, i.e., for more than ten 2015-05-22 17:05:21 +00:00
uipc_mbuf2.c Add const-qualifiers for source mbuf argument in m_dup(), m_copym(), 2015-08-08 15:50:46 +00:00
uipc_mbuf.c Add const-qualifiers for source mbuf argument in m_dup(), m_copym(), 2015-08-08 15:50:46 +00:00
uipc_mbufhash.c Reduce header pollution. 2015-03-17 14:16:50 +00:00
uipc_mqueue.c fd: remove filedesc argument from fdclose 2015-04-11 15:40:28 +00:00
uipc_sem.c Call ksem_get() with initialized 'rights'. 2015-07-23 23:18:03 +00:00
uipc_shm.c Add kern_shm_open(). 2015-08-01 07:21:14 +00:00
uipc_sockbuf.c Implement lockless resource limits. 2015-06-10 10:48:12 +00:00
uipc_socket.c Make shutdown() return ENOTCONN as required by POSIX, part deux. 2015-07-27 13:17:57 +00:00
uipc_syscalls.c Make shutdown() return ENOTCONN as required by POSIX, part deux. 2015-07-27 13:17:57 +00:00
uipc_usrreq.c fd: make the common case in filecaps_copy work lockless 2015-09-07 20:02:56 +00:00
vfs_acl.c Replace struct filedesc argument in getvnode with struct thread 2015-06-16 13:09:18 +00:00
vfs_aio.c Mutex memory is not zeroed, add MTX_NEW. 2015-07-06 14:09:00 +00:00
vfs_bio.c dev_strategy and dev_strategy_csw are unused since r281825. Remove 2015-09-11 00:38:58 +00:00
vfs_cache.c Track changes to kern.maxvnodes and appropriately increase or decrease 2015-09-06 05:50:51 +00:00
vfs_cluster.c Refactor unmapped buffer address handling. 2015-07-23 19:13:41 +00:00
vfs_default.c vfs: use shared vnode locking when looking up ".." in vop_stdvptocnp 2015-07-04 15:46:39 +00:00
vfs_export.c After the changes in r274118 make NOIP kernels compile by hiding an 2014-11-06 12:19:39 +00:00
vfs_extattr.c Replace struct filedesc argument in getvnode with struct thread 2015-06-16 13:09:18 +00:00
vfs_hash.c Track changes to kern.maxvnodes and appropriately increase or decrease 2015-09-06 05:50:51 +00:00
vfs_init.c Revert r285125 until rmlocks get fixed. 2015-07-30 19:52:43 +00:00
vfs_lookup.c Properly return ENOTDIR when calling *at() on a non-vnode. 2015-08-12 16:17:00 +00:00
vfs_mount.c Make vfs_unmountall() unmount /dev after /, not before. The only 2015-08-24 13:18:13 +00:00
vfs_mountroot.c An error of -1 from parse_mount() indicates that the specification 2015-08-27 04:25:27 +00:00
vfs_subr.c Track changes to kern.maxvnodes and appropriately increase or decrease 2015-09-06 05:50:51 +00:00
vfs_syscalls.c Decompose linkat()/renameat() rights to source and target. 2015-08-27 15:16:41 +00:00
vfs_vnops.c For open("name", O_DIRECTORY | O_CREAT), do not try to create the 2015-09-09 19:31:08 +00:00
vnode_if.src Catch up on r271387 and remove unused parameter from 2015-03-30 22:49:26 +00:00