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* sys: Automated cleanup of cdefs and other formattingWarner Losh2023-11-271-1/+0
| | | | | | | | | | | | | | | | Apply the following automated changes to try to eliminate no-longer-needed sys/cdefs.h includes as well as now-empty blank lines in a row. Remove /^#if.*\n#endif.*\n#include\s+<sys/cdefs.h>.*\n/ Remove /\n+#include\s+<sys/cdefs.h>.*\n+#if.*\n#endif.*\n+/ Remove /\n+#if.*\n#endif.*\n+/ Remove /^#if.*\n#endif.*\n/ Remove /\n+#include\s+<sys/cdefs.h>\n#include\s+<sys/types.h>/ Remove /\n+#include\s+<sys/cdefs.h>\n#include\s+<sys/param.h>/ Remove /\n+#include\s+<sys/cdefs.h>\n#include\s+<sys/capsicum.h>/ Sponsored by: Netflix
* sys: Remove $FreeBSD$: one-line .c patternWarner Losh2023-08-161-2/+0
| | | | Remove /^[\s*]*__FBSDID\("\$FreeBSD\$"\);?\s*\n/
* spdx: The BSD-2-Clause-FreeBSD identifier is obsolete, drop -FreeBSDWarner Losh2023-05-121-1/+1
| | | | | | | | | The SPDX folks have obsoleted the BSD-2-Clause-FreeBSD identifier. Catch up to that fact and revert to their recommended match of BSD-2-Clause. Discussed with: pfg MFC After: 3 days Sponsored by: Netflix
* kern.tty_info_kstacks: add a compact formatPawel Biernacki2020-07-061-4/+15
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Add a more compact display format for kern.tty_info_kstacks inspired by procstat -kk. Set it as a default one. # sysctl kern.tty_info_kstacks=1 kern.tty_info_kstacks: 0 -> 1 # sleep 2 ^T load: 0.17 cmd: sleep 623 [nanslp] 0.72r 0.00u 0.00s 0% 2124k #0 0xffffffff80c4443e at mi_switch+0xbe #1 0xffffffff80c98044 at sleepq_catch_signals+0x494 #2 0xffffffff80c982c2 at sleepq_timedwait_sig+0x12 #3 0xffffffff80c43af3 at _sleep+0x193 #4 0xffffffff80c50e31 at kern_clock_nanosleep+0x1a1 #5 0xffffffff80c5119b at sys_nanosleep+0x3b #6 0xffffffff810ffc69 at amd64_syscall+0x119 #7 0xffffffff810d5520 at fast_syscall_common+0x101 sleep: about 1 second(s) left out of the original 2 ^C # sysctl kern.tty_info_kstacks=2 kern.tty_info_kstacks: 1 -> 2 # sleep 2 ^T load: 0.24 cmd: sleep 625 [nanslp] 0.81r 0.00u 0.00s 0% 2124k mi_switch+0xbe sleepq_catch_signals+0x494 sleepq_timedwait_sig+0x12 sleep+0x193 kern_clock_nanosleep+0x1a1 sys_nanosleep+0x3b amd64_syscall+0x119 fast_syscall_common+0x101 sleep: about 1 second(s) left out of the original 2 ^C Suggested by: avg Reviewed by: mjg Relnotes: yes Sponsored by: Mysterious Code Ltd. Differential Revision: https://reviews.freebsd.org/D25487 Notes: svn path=/head/; revision=362967
* Add debugging facility EPOCH_TRACE that checks that epochs entered areGleb Smirnoff2019-09-251-1/+1
| | | | | | | | | | | | | | properly nested and warns about recursive entrances. Unlike with locks, there is nothing fundamentally wrong with such use, the intent of tracer is to help to review complex epoch-protected code paths, and we mean the network stack here. Reviewed by: hselasky Sponsored by: Netflix Pull Request: https://reviews.freebsd.org/D21610 Notes: svn path=/head/; revision=352707
* stack(9): Drop unused API mode and comment that referenced itConrad Meyer2019-03-151-24/+8
| | | | | | | | Reviewed by: markj Differential Revision: https://reviews.freebsd.org/D19601 Notes: svn path=/head/; revision=345206
* Add flags variants to linker_files / stack(9) symbol resolutionConrad Meyer2018-10-201-18/+32
| | | | | | | | | | | | | | | | | | Some best-effort consumers may find trylock behavior for stack(9) symbol resolution acceptable. Expose that behavior to such consumers. This API is ugly. If in the future the modules and linker file list locking is cleaned up such that the linker_files list can be iterated safely without acquiring a sleepable lock, this API should be removed. However, most of the time nothing will be holding the linker files lock exclusive and the acquisition can proceed. Reviewed by: markj Sponsored by: Dell EMC Isilon Differential Revision: https://reviews.freebsd.org/D17620 Notes: svn path=/head/; revision=339463
* sys/kern: adoption of SPDX licensing ID tags.Pedro F. Giffuni2017-11-271-0/+2
| | | | | | | | | | | | | | | Mainly focus on files that use BSD 2-Clause license, however the tool I was using misidentified many licenses so this was mostly a manual - error prone - task. The Software Package Data Exchange (SPDX) group provides a specification to make it easier for automated tools to detect and summarize well known opensource licenses. We are gradually adopting the specification, noting that the tags are considered only advisory and do not, in any way, superceed or replace the license texts. Notes: svn path=/head/; revision=326271
* Let stack_create(9) take a malloc flags argument.Mark Johnston2017-10-061-2/+2
| | | | | | | | | Reviewed by: cem Sponsored by: Dell EMC Isilon Differential Revision: https://reviews.freebsd.org/D12614 Notes: svn path=/head/; revision=324377
* Add support for a configurable output channel to witness(4).Mark Johnston2015-11-191-2/+2
| | | | | | | | | | | | | | | | | | This is useful in environments where system configuration is performed by automated interaction with the system console, since unexpected witness output makes such automation difficult. With this change, the new debug.witness.output_channel sysctl allows one to specify that witness output is to be printed to the kernel log (using log(9)) rather than the console. Reviewed by: cem, jhb MFC after: 2 weeks Relnotes: yes Sponsored by: EMC / Isilon Storage Division Differential Revision: https://reviews.freebsd.org/D4183 Notes: svn path=/head/; revision=291059
* Constify stack argument for functions that don't modify it.Pawel Jakub Dawidek2011-11-161-9/+9
| | | | | | | Reviewed by: ed, kib, jhb Notes: svn path=/head/; revision=227581
* Add some FEATURE macros for various features (AUDIT/CAM/IPC/KTR/MAC/NFS/NTP/Alexander Leidinger2011-02-251-0/+3
| | | | | | | | | | | | | | | | PMC/SYSV/...). No FreeBSD version bump, the userland application to query the features will be committed last and can serve as an indication of the availablility if needed. Sponsored by: Google Summer of Code 2010 Submitted by: kibab Reviewed by: arch@ (parts by rwatson, trasz, jhb) X-MFC after: to be determined in last commit with code from this project Notes: svn path=/head/; revision=219028
* kdb_backtrace: use stack_print_ddb instead of stack_printAndriy Gapon2010-09-221-5/+1
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | This is a followup to r212964. stack_print call chain obtains linker sx lock and thus potentially may lead to a deadlock depending on a kind of a panic. stack_print_ddb doesn't acquire any locks and it doesn't use any facilities of ddb backend. Using stack_print_ddb outside of DDB ifdef required taking a number of helper functions from under it as well. It is a good idea to rename linker_ddb_* and stack_*_ddb functions to have 'unlocked' component in their name instead of 'ddb', because those functions do not use any DDB services, but instead they provide unlocked access to linker symbol information. The latter was previously needed only for DDB, hence the 'ddb' name component. Alternative is to ditch unlocked versions altogether after implementing proper panic handling: 1. stop other cpus upon a panic 2. make all non-spinlock lock operations (mutex, sx, rwlock) be a no-op when panicstr != NULL Suggested by: mdf Discussed with: attilio MFC after: 2 weeks Notes: svn path=/head/; revision=212994
* Add stack_print_short() and stack_print_short_ddb() interfaces toRobert Watson2009-06-241-10/+54
| | | | | | | | | | stack(9), which generate a more compact rendition of a stack trace via the kernel's printf. MFC after: 1 week Notes: svn path=/head/; revision=194828
* Make it possible to compile kernel with KTR but without DDB.Maxim Sobolev2008-10-301-1/+5
| | | | Notes: svn path=/head/; revision=184487
* Ktr(9) stores format string and arguments in the event circular buffer,Konstantin Belousov2008-10-191-21/+25
| | | | | | | | | | | | | | | not the string formatted at the time of CTRX() call. Stack_ktr(9) uses an on-stack buffer for the symbol name, that is supplied as an argument to ktr. As result, stack_ktr() traces show garbage or cause page faults. Fix stack_ktr() by using pointer to module symbol table that is supposed to have a longer lifetime. Tested by: pho MFC after: 1 week Notes: svn path=/head/; revision=184060
* Staticize M_STACK.Antoine Brodin2008-07-131-1/+1
| | | | | | | | Approved by: rwatson (mentor) MFC after: 1 month Notes: svn path=/head/; revision=180495
* When a symbol name can't be resolved, return "??" as the name, ratherRobert Watson2007-12-031-2/+2
| | | | | | | | than "Unknown func", in order to avoid putting spaces in what ideally is a string separated by white space. Notes: svn path=/head/; revision=174222
* Break out stack(9) from ddb(4):Robert Watson2007-12-021-0/+2
| | | | | | | | | | | | | | | | | | | | | | | - Introduce per-architecture stack_machdep.c to hold stack_save(9). - Introduce per-architecture machine/stack.h to capture any common definitions required between db_trace.c and stack_machdep.c. - Add new kernel option "options STACK"; we will build in stack(9) if it is defined, or also if "options DDB" is defined to provide compatibility with existing users of stack(9). Add new stack_save_td(9) function, which allows the capture of a stacktrace of another thread rather than the current thread, which the existing stack_save(9) was limited to. It requires that the thread be neither swapped out nor running, which is the responsibility of the consumer to enforce. Update stack(9) man page. Build tested: amd64, arm, i386, ia64, powerpc, sparc64, sun4v Runtime tested: amd64 (rwatson), arm (cognet), i386 (rwatson) Notes: svn path=/head/; revision=174195
* Modify stack(9) stack_print() and stack_sbuf_print() routines to use newRobert Watson2007-12-011-24/+79
| | | | | | | | | | | | | | | | | | | linker interfaces for looking up function names and offsets from instruction pointers. Create two variants of each call: one that is "DDB-safe" and avoids locking in the linker, and one that is safe for use in live kernels, by virtue of observing locking, and in particular safe when kernel modules are being loaded and unloaded simultaneous to their use. This will allow them to be used outside of debugging contexts. Modify two of three current stack(9) consumers to use the DDB-safe interfaces, as they run in low-level debugging contexts, such as inside lockmgr(9) and the kernel memory allocator. Update man page. Notes: svn path=/head/; revision=174137
* Correct typosKris Kennaway2006-05-281-3/+3
| | | | | | | MFC after: 2 weeks Notes: svn path=/head/; revision=159022
* Add 'depth' argument to CTRSTACK() macro, which allows to reduce numberPawel Jakub Dawidek2005-08-291-3/+7
| | | | | | | | of ktr slots used. If 'depth' is equal to 0, the whole stack will be logged, just like before. Notes: svn path=/head/; revision=149574
* - Add support for saving stack traces and displaying them via printf(9)Jeff Roberson2005-08-031-0/+165
and KTR. Contributed by: Antoine Brodin <antoine.brodin@laposte.net> Concept code from: Neal Fachan <neal@isilon.com> Notes: svn path=/head/; revision=148666
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