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* Trim some additional unnecessary <linker_set.h> includes.John Baldwin2011-04-281-1/+0
| | | | | | | MFC after: 1 week Notes: svn path=/head/; revision=221179
* - Add the possibility to reuse the already last used timeout when pattingAttilio Rao2011-04-271-8/+0
| | | | | | | | | | | | | | | | | | | | | | | | | | the watchdog, via the watchdog(9) interface. For that, the WD_LASTVAL bitwise operation is used. It is mutually exclusive with any explicit timout passing to the watchdogs. The last timeout can be returned via the wdog_kern_last_timeout() KPI. - Add the possibility to pat the watchdogs installed via the watchdog(9) interface from the kernel. In order to do that the new KPI wdog_kern_pat() is offered and it does accept normalized nanoseconds or WD_LASTVAL. - Avoid to pass WD_ACTIVE down in the watchdog handlers. All the control bit processing should over to the upper layer functions and not passed down to the handlers at all. These changes are intended to be used in order to fix up the watchdog tripping in situation when the userland is busted, but protection is still wanted (examples: shutdown syncing / disk dumping). Sponsored by: Sandvine Incorporated Reviewed by: emaste, des, cognet MFC after: 2 weeks Notes: svn path=/head/; revision=221121
* Extend the DDB command "watchdog" with the ability to specify a timeoutAttilio Rao2011-04-051-8/+25
| | | | | | | | | | | | | | | | | | | value. The timeout is expressed in the form T(N) = (2^N * nanoseconds) and can be easilly extracted from the watchdog interface as a WD_TO_* macro. That new functionality is supposed to fix re-entering the kernel from DDB re-enabling the watchdog again (previously disabled) and also offer the possibility to break for deadlocked DDB commands. Please note that retro-compatibility is retained. Sponsored by: Sandvine Incorporated Approved by: des MFC after: 10 days Notes: svn path=/head/; revision=220362
* Modify kdb_trap() so that it re-calls the dbbe_trap function as long asMatthew D Fleming2011-02-181-3/+9
| | | | | | | | | | | | | | | | | | the debugger back-end has changed. This means that switching from ddb to gdb no longer requires a "step" which can be dangerous on an already-crashed kernel. Also add a capability to get from the gdb back-end back to ddb, by typing ^C in the console window. While here, simplify kdb_sysctl_available() by using sbuf_new_for_sysctl(), and use strlcpy() instead of strncpy() since the strlcpy semantic is desired. MFC after: 1 month Notes: svn path=/head/; revision=218825
* sysctl(9) cleanup checkpoint: amd64 GENERIC builds cleanly.Matthew D Fleming2011-01-121-1/+1
| | | | | | | Commit the kernel changes. Notes: svn path=/head/; revision=217326
* One more use for _SIG_VALID.Konstantin Belousov2010-07-121-1/+1
| | | | | | | | Submitted by: Garrett Cooper <yanegomi gmail com> MFC after: 1 week Notes: svn path=/head/; revision=209934
* MFp4 @178364:Bjoern A. Zeeb2010-05-243-34/+67
| | | | | | | | | | | | | | | | | | | | | Implement an optional delay to the ddb reset/reboot command. This allows textdumps to be run automatically with unattended reboots after a resonable timeout, while still permitting an administrator to break into debugger if attached to the console at the time of the event for further debugging. Cap the maximum delay at 1 week to avoid highly accidental results, and default to 15s in case of problems parsing the timeout value. Move hex2dec helper function from db_thread.c to db_command.c to make it generally available and prefix it with a "db_" to avoid namespace collisions. Reviewed by: rwatson MFC after: 4 weeks Notes: svn path=/head/; revision=208509
* There is not a good reason to have a different prototype for db_printf()Attilio Rao2010-05-112-3/+5
| | | | | | | | | | | when compared to printf(). Unify it by returning the number of characters displayed for db_printf() as well. MFC after: 7 days Notes: svn path=/head/; revision=207922
* Move two copies of the same definition to a common include file.Julian Elischer2010-04-141-6/+0
| | | | | | | MFC after: 3 weeks Notes: svn path=/head/; revision=206639
* Add a space before printing 'thread pid ...' to match the space beforeRui Paulo2010-02-121-1/+1
| | | | | | | ']'. Notes: svn path=/head/; revision=203804
* Replace several instances of 'if (!a & b)' with 'if (!(a &b))' in orderEdward Tomasz Napierala2010-01-081-2/+2
| | | | | | | to silence newer GCC versions. Notes: svn path=/head/; revision=201794
* Among signal generation syscalls, only sigqueue(2) is allowed by POSIXKonstantin Belousov2009-11-171-1/+1
| | | | | | | | | | | | | | | | | | | | | | | | | | | | to fail due to lack of resources to queue siginfo. Add KSI_SIGQ flag that allows sigqueue_add() to fail while trying to allocate memory for new siginfo. When the flag is not set, behaviour is the same as for KSI_TRAP: if memory cannot be allocated, set bit in sq_kill. KSI_TRAP is kept to preserve KBI. Add SI_KERNEL si_code, to be used in siginfo.si_code when signal is generated by kernel. Deliver siginfo when signal is generated by kill(2) family of syscalls (SI_USER with properly filled si_uid and si_pid), or by kernel (SI_KERNEL, mostly job control or SIGIO). Since KSI_SIGQ flag is not set for the ksi, low memory condition cause old behaviour. Keep psignal(9) KBI intact, but modify it to generate SI_KERNEL si_code. Pgsignal(9) and gsignal(9) now take ksi explicitely. Add pksignal(9) that behaves like psignal but takes ksi, and ddb kill command implemented as pksignal(..., ksi = NULL) to not do allocation while in debugger. While there, remove some register specifiers and use ANSI C prototypes. Reviewed by: davidxu MFC after: 1 month Notes: svn path=/head/; revision=199355
* Put square backets ([]) around process names for system processes to patchJohn Baldwin2009-10-011-4/+10
| | | | | | | the behavior of ps(1). Notes: svn path=/head/; revision=197684
* Merge the remainder of kern_vimage.c and vimage.h into vnet.c andRobert Watson2009-08-011-1/+1
| | | | | | | | | | | | | vnet.h, we now use jails (rather than vimages) as the abstraction for virtualization management, and what remained was specific to virtual network stacks. Minor cleanups are done in the process, and comments updated to reflect these changes. Reviewed by: bz Approved by: re (vimage blanket) Notes: svn path=/head/; revision=196019
* Build on Jeff Roberson's linker-set based dynamic per-CPU allocatorRobert Watson2009-07-145-1/+185
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | (DPCPU), as suggested by Peter Wemm, and implement a new per-virtual network stack memory allocator. Modify vnet to use the allocator instead of monolithic global container structures (vinet, ...). This change solves many binary compatibility problems associated with VIMAGE, and restores ELF symbols for virtualized global variables. Each virtualized global variable exists as a "reference copy", and also once per virtual network stack. Virtualized global variables are tagged at compile-time, placing the in a special linker set, which is loaded into a contiguous region of kernel memory. Virtualized global variables in the base kernel are linked as normal, but those in modules are copied and relocated to a reserved portion of the kernel's vnet region with the help of a the kernel linker. Virtualized global variables exist in per-vnet memory set up when the network stack instance is created, and are initialized statically from the reference copy. Run-time access occurs via an accessor macro, which converts from the current vnet and requested symbol to a per-vnet address. When "options VIMAGE" is not compiled into the kernel, normal global ELF symbols will be used instead and indirection is avoided. This change restores static initialization for network stack global variables, restores support for non-global symbols and types, eliminates the need for many subsystem constructors, eliminates large per-subsystem structures that caused many binary compatibility issues both for monitoring applications (netstat) and kernel modules, removes the per-function INIT_VNET_*() macros throughout the stack, eliminates the need for vnet_symmap ksym(2) munging, and eliminates duplicate definitions of virtualized globals under VIMAGE_GLOBALS. Bump __FreeBSD_version and update UPDATING. Portions submitted by: bz Reviewed by: bz, zec Discussed with: gnn, jamie, jeff, jhb, julian, sam Suggested by: peter Approved by: re (kensmith) Notes: svn path=/head/; revision=195699
* Place hostnames and similar information fully under the prison system.Jamie Gritton2009-05-291-1/+0
| | | | | | | | | | | | | | | | | | | | The system hostname is now stored in prison0, and the global variable "hostname" has been removed, as has the hostname_mtx mutex. Jails may have their own host information, or they may inherit it from the parent/system. The proper way to read the hostname is via getcredhostname(), which will copy either the hostname associated with the passed cred, or the system hostname if you pass NULL. The system hostname can still be accessed directly (and without locking) at prison0.pr_host, but that should be avoided where possible. The "similar information" referred to is domainname, hostid, and hostuuid, which have also become prison parameters and had their associated global variables removed. Approved by: bz (mentor) Notes: svn path=/head/; revision=193066
* Prefer prototypes to k&r definitions.Warner Losh2009-03-091-12/+6
| | | | Notes: svn path=/head/; revision=189581
* Collect N identical (or near identical) mkdumpheader() implementations intoPeter Wemm2008-10-011-26/+2
| | | | | | | one, as threatened in the comment. Textdump magic can be passed in. Notes: svn path=/head/; revision=183527
* Initialize the DDB command list when initializing DDB so that the basicJohn Baldwin2008-09-253-3/+4
| | | | | | | | | commands are available from 'boot -d'. Suggested by: dfr Notes: svn path=/head/; revision=183360
* Make ddb command registration dynamic so modules can extendSam Leffler2008-09-152-99/+176
| | | | | | | | | | | | | | | | | | | | | | | | | the command set (only so long as the module is present): o add db_command_register and db_command_unregister to add and remove commands, respectively o replace linker sets with SYSINIT's (and SYSUINIT's) that register commands o expose 3 list heads: db_cmd_table, db_show_table, and db_show_all_table for registering top-level commands, show operands, and show all operands, respectively While here also: o sort command lists o add DB_ALIAS, DB_SHOW_ALIAS, and DB_SHOW_ALL_ALIAS to add aliases for existing commands o add "show all trace" as an alias for "show alltrace" o add "show all locks" as an alias for "show alllocks" Submitted by: Guillaume Ballet <gballet@gmail.com> (original version) Reviewed by: jhb MFC after: 1 month Notes: svn path=/head/; revision=183054
* Add a missing include which was erroneusly left out from the previousAttilio Rao2008-08-181-0/+2
| | | | | | | | | commit. Sponsored by: Nokia Notes: svn path=/head/; revision=181842
* Bufferize the output for DDB printouts.Attilio Rao2008-08-181-15/+87
| | | | | | | | | | | | In order to CATER this, DDB buffered output can be choosen at compile time through the option DDB_BUFR_SIZE=nbytes where nbytes choose the size of the buffer (suggested size is 128 bytes), which should be manually specified in any interested config file. Sponsored by: Nokia Notes: svn path=/head/; revision=181840
* Commit step 1 of the vimage project, (network stack)Bjoern A. Zeeb2008-08-171-1/+2
| | | | | | | | | | | | | | | | | | | | | | | | | | | virtualization work done by Marko Zec (zec@). This is the first in a series of commits over the course of the next few weeks. Mark all uses of global variables to be virtualized with a V_ prefix. Use macros to map them back to their global names for now, so this is a NOP change only. We hope to have caught at least 85-90% of what is needed so we do not invalidate a lot of outstanding patches again. Obtained from: //depot/projects/vimage-commit2/... Reviewed by: brooks, des, ed, mav, julian, jamie, kris, rwatson, zec, ... (various people I forgot, different versions) md5 (with a bit of help) Sponsored by: NLnet Foundation, The FreeBSD Foundation X-MFC after: never V_Commit_Message_Reviewed_By: more people than the patch Notes: svn path=/head/; revision=181803
* Fix software single-stepping: we need to check if the instruction is aOlivier Houchard2008-08-021-1/+1
| | | | | | | | | | return instruction as well, or we'll stop single-stepping as soon as we'll return from a function. MFC after: 3 days Notes: svn path=/head/; revision=181175
* Print out the container lock when showing the thread state in DDB.Attilio Rao2008-06-181-0/+3
| | | | | | | Tested by: benjsc Notes: svn path=/head/; revision=179861
* Rename debug.ddb.capture.bytes sysctl to debug.ddb.capture.bufoff inRobert Watson2008-04-251-1/+4
| | | | | | | | | | | | order to match the internal variable name. Add a new sysctl debug.ddb.capture.inprogress to export the inprogress variable. MFC after: 3 days Notes: svn path=/head/; revision=178492
* enable dynamic addition of "show all" commandsSam Leffler2008-03-253-2/+15
| | | | | | | MFC after: 3 weeks Notes: svn path=/head/; revision=177615
* Add a /S mode to DDB "ex" command, which interprets and prints theRobert Watson2008-03-071-0/+6
| | | | | | | | | | | | | | | | | | | value at the requested address as a symbol. For example, "ex /S aio_swake" prints the name of the function currently registered in via aio_swake hook. The change as committed differs slightly from the patch in the PR, as I force the size of the retrieved value (and the automatic address increment) to be sizeof(void *). This seems to provide the most useful auto-increment behavior, and defaults using the default size (4), which is not sizeof(void *) on 64-bit platforms. MFC after: 3 days PR: 57976 Submitted by: Dan Strick <strick at covad.net> Notes: svn path=/head/; revision=176914
* When killing a user process from DDB, check that the requested signal isRobert Watson2008-03-071-1/+1
| | | | | | | | | | | > 0 rather than >= 0, or we will panic when trying to deliver the signal. MFC after: 3 days PR: 100802 Submitted by: Valerio Daelli <valerio.daelli at gmail.com> Notes: svn path=/head/; revision=176897
* Reserve two bytes at the end of the DDB input line in db_readline() toRobert Watson2008-03-071-1/+4
| | | | | | | | | | | | | hold the newline and nul terminator. Otherwise, there are cases where garbage may end up in the command history due to a lack of a nul terminator, or input may end up without room for a newline. MFC after: 3 days PR: 119079 Submitted by: Michael Plass <mfp49_freebsd@plass-family.net> Notes: svn path=/head/; revision=176895
* When redrawing an input line, count backspaces to get to the beginning ofRobert Watson2008-03-061-1/+1
| | | | | | | | | | | | | | the input field from the current cursor location, rather than the end of the input line, as the cursor may not be at the end of the line. Otherwise, we may overshoot, overwriting a bit of the previous line and failing to fully overwrite the current line. MFC after: 3 days PR: 119079 Submitted by: Michael Plass <mfp49_freebsd@plass-family.net> Notes: svn path=/head/; revision=176870
* Use dump_write() instead of direct calls to di->dumper() in textdumps.Robert Watson2008-01-311-3/+3
| | | | | | | | | | Textdumps already do pretty much the same sanity checking, but abstractions and seatbelts are both useful. MFC after: 2 months Notes: svn path=/head/; revision=175858
* Increase maximum DDB capture buffer size to 5MB.Robert Watson2008-01-261-1/+1
| | | | | | | | | PR: 119993 MFC after: 2 months Suggested by: Scot Hetzel <swhetzel at gmail dot com> Notes: svn path=/head/; revision=175699
* Allow DDB_CAPTURE_DEFAULTBUFSIZE and DDB_CAPTURE_MAXBUFSIZE to beRobert Watson2008-01-261-13/+18
| | | | | | | | | | | | | | | overridden at compile-time using kernel options of the same names. Rather than doing a compile-time CTASSERT of buffer sizes being even multiples of block sizes, just adjust them at boottime, as the failure mode is more user-friendly. MFC after: 2 months PR: 119993 Suggested by: Scot Hetzel <swhetzel at gmail dot com> Notes: svn path=/head/; revision=175694
* Rename DB_ constants in db_capture.c to DDB_ so that when they areRobert Watson2008-01-261-16/+16
| | | | | | | | | | | exposed as kernel compile options, they have more meaningful names. PR: 119993 MFC after: 2 months Suggested by: Scot Hetzel <swhetzel at gmail dot com> Notes: svn path=/head/; revision=175684
* Refine textdump comments slightly.Robert Watson2008-01-101-10/+12
| | | | | | | MFC after: 3 months Notes: svn path=/head/; revision=175199
* Add textdump(4) facility, which provides an alternative form of kernelRobert Watson2007-12-264-3/+634
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | dump using mechanically generated/extracted debugging output rather than a simple memory dump. Current sources of debugging output are: - DDB output capture buffer, if there is captured output to save - Kernel message buffer - Kernel configuration, if included in kernel - Kernel version string - Panic message Textdumps are stored in swap/dump partitions as with regular dumps, but are laid out as ustar files in order to allow multiple parts to be stored as a stream of sequentially written blocks. Blocks are written out in reverse order, as the size of a textdump isn't known a priori. As with regular dumps, they will be extracted using savecore(8). One new DDB(4) command is added, "textdump", which accepts "set", "unset", and "status" arguments. By default, normal kernel dumps are generated unless "textdump set" is run in order to schedule a textdump. It can be canceled using "textdump unset" to restore generation of a normal kernel dump. Several sysctls exist to configure aspects of textdumps; debug.ddb.textdump.pending can be set to check whether a textdump is pending, or set/unset in order to control whether the next kernel dump will be a textdump from userspace. While textdumps don't have to be generated as a result of a DDB script run automatically as part of a kernel panic, this is a particular useful way to use them, as instead of generating a complete memory dump, a simple transcript of an automated DDB session can be captured using the DDB output capture and textdump facilities. This can be used to generate quite brief kernel bug reports rich in debugging information but not dependent on kernel symbol tables or precisely synchronized source code. Most textdumps I generate are less than 100k including the full message buffer. Using textdumps with an interactive debugging session is also useful, with capture being enabled/disabled in order to record some but not all of the DDB session. MFC after: 3 months Notes: svn path=/head/; revision=174921
* Remove duplicate $FreeBSD$ that snuck in.Robert Watson2007-12-261-2/+0
| | | | | | | MFC after: 3 months Notes: svn path=/head/; revision=174919
* Add a simple scripting facility to DDB(4), allowing the user toRobert Watson2007-12-267-10/+665
| | | | | | | | | | | | | | | | | | | | | | | | | define a set of named scripts. Each script consists of a list of DDB commands separated by ";"s that will be executed verbatim. No higher level language constructs, such as branching, are provided for: scripts are executed by sequentially injecting commands into the DDB input buffer. Four new commands are present in DDB: "run" to run a specific script, "script" to define or print a script, "scripts" to list currently defined scripts, and "unscript" to delete a script, modeled on shell alias commands. Scripts may also be manipulated using sysctls in the debug.ddb.scripting MIB space, although users will prefer to use the soon-to-be-added ddb(8) tool for usability reasons. Scripts with certain names are automatically executed on various DDB events, such as entering the debugger via a panic, a witness error, watchdog, breakpoint, sysctl, serial break, etc, allowing customized handling. MFC after: 3 months Notes: svn path=/head/; revision=174914
* Add a new DDB(4) facility, output capture. Input and output from DDB may beRobert Watson2007-12-256-0/+329
| | | | | | | | | | | | | | | | captured to a memory buffer for later inspection using sysctl(8), or in the future, to a textdump. A new DDB command, "capture", is added, which accepts arguments "on", "off", "reset", and "status". A new DDB sysctl tree, debug.ddb.capture, is added, which can be used to resize the capture buffer and extract buffer contents. MFC after: 3 months Notes: svn path=/head/; revision=174910
* Make the examine command honor db_pager_quit so you can use 'q' or 'x'John Baldwin2007-10-271-1/+1
| | | | | | | | | at the pager prompt to abort an examine command that spans multiple pages. MFC after: 1 week Notes: svn path=/head/; revision=173077
* Print the stack bounds of the thread.Marcel Moolenaar2007-10-161-0/+2
| | | | Notes: svn path=/head/; revision=172705
* - Move all of the PS_ flags into either p_flag or td_flags.Jeff Roberson2007-09-171-1/+1
| | | | | | | | | | | | | | | | | - p_sflag was mostly protected by PROC_LOCK rather than the PROC_SLOCK or previously the sched_lock. These bugs have existed for some time. - Allow swapout to try each thread in a process individually and then swapin the whole process if any of these fail. This allows us to move most scheduler related swap flags into td_flags. - Keep ki_sflag for backwards compat but change all in source tools to use the new and more correct location of P_INMEM. Reported by: pho Reviewed by: attilio, kib Approved by: re (kensmith) Notes: svn path=/head/; revision=172207
* Use FOREACH_PROC_IN_SYSTEM instead of using its unrolled form.Xin LI2007-01-172-4/+4
| | | | Notes: svn path=/head/; revision=166074
* Threading cleanup.. part 2 of several.Julian Elischer2006-12-061-5/+0
| | | | | | | | | | | | | | | | | | | | | | | | | Make part of John Birrell's KSE patch permanent.. Specifically, remove: Any reference of the ksegrp structure. This feature was never fully utilised and made things overly complicated. All code in the scheduler that tried to make threaded programs fair to unthreaded programs. Libpthread processes will already do this to some extent and libthr processes already disable it. Also: Since this makes such a big change to the scheduler(s), take the opportunity to rename some structures and elements that had to be moved anyhow. This makes the code a lot more readable. The ULE scheduler compiles again but I have no idea if it works. The 4bsd scheduler still reqires a little cleaning and some functions that now do ALMOST nothing will go away, but I thought I'd do that as a separate commit. Tested by David Xu, and Dan Eischen using libthr and libpthread. Notes: svn path=/head/; revision=164936
* Fix the output format of MI ddb watches in 'show watch' on 64-bitJohn Baldwin2006-11-171-0/+8
| | | | | | | platforms. Notes: svn path=/head/; revision=164359
* Set up the context for the dbbe_trace callback in the ddb. Otherwise,Konstantin Belousov2006-11-061-1/+14
| | | | | | | | | trap caused by backtracing would lead to panic. Noted and reviewed by: bde Notes: svn path=/head/; revision=164029
* On trap while inside ddb, the trap handler calls kdb_reenter(), thatKonstantin Belousov2006-11-021-6/+14
| | | | | | | | | | | | | | | longjmp to the default context. As result, "alltrace" command may be prematurely terminated (without error message). This is happens, for instance, when system is low on memory and referenced page in kernel-mode thread stack is swapped out. Protect "alltrace" against termination on trap by setting temporary kdb_jmpbuf context. Submitted by: Peter Holm Notes: svn path=/head/; revision=163909
* Make KSE a kernel option, turned on by default in all GENERICJohn Birrell2006-10-261-0/+4
| | | | | | | | | | kernel configs except sun4v (which doesn't process signals properly with KSE). Reviewed by: davidxu@ Notes: svn path=/head/; revision=163709
* The powerpc and sparc64 MD `reboot' commands should never have existedBruce Evans2006-10-101-1/+10
| | | | | | | | | | | | | | | | | | | | since they just duplicated the MI `reset' command. Instead of removing them, make `reboot' an MI alias for `reboot' since this gives a better way of killing the `r' alias for `reset'. Remove the `registers' command that was used to kill the alias. Turn the powerpc and sparc64 MD `halt' command into an MI command. A copy of sparc64/db_interface.c grew in sun4v just after I found the extra reboot commands. It has not been changed, and is now not identical. Duplicated commands come out duplicated in ddb's online help, but cause large problems when used (e.g., on i386's with 2 halt's and an hwatch, typing h doesn' give the expected message about an ambiguous command, but hangs like the halt command or a looping parseri would). Notes: svn path=/head/; revision=163192
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