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opnsense-src/sys/kern
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David Xu 4d47dc5549 Add code to support debugging threaded process. 
1. Add tm_lwpid into kse_thr_mailbox to indicate which kernel
     thread current user thread is running on. Add tm_dflags into
     kse_thr_mailbox, the flags is written by debugger, it tells
     UTS and kernel what should be done when the process is being
     debugged, current, there two flags TMDF_SSTEP and TMDF_DONOTRUNUSER.

     TMDF_SSTEP is used to tell kernel to turn on single stepping,
     or turn off if it is not set.

     TMDF_DONOTRUNUSER is used to tell kernel to schedule upcall
     whenever possible, to UTS, it means do not run the user thread
     until debugger clears it, this behaviour is necessary because
     gdb wants to resume only one thread when the thread's pc is
     at a breakpoint, and thread needs to go forward, in order to
     avoid other threads sneak pass the breakpoints, it needs to remove
     breakpoint, only wants one thread to go. Also, add km_lwp to
     kse_mailbox, the lwp id is copied to kse_thr_mailbox at context
     switch time when process is not being debugged, so when process
     is attached, debugger can map kernel thread to user thread.

  2. Add p_xthread to proc strcuture and td_xsig to thread structure.
     p_xthread is used by a thread when it wants to report event
     to debugger, every thread can set the pointer, especially, when
     it is used in ptracestop, it is the last thread reporting event
     will win the race. Every thread has a td_xsig to exchange signal
     with debugger, thread uses TDF_XSIG flag to indicate it is reporting
     signal to debugger, if the flag is not cleared, thread will keep
     retrying until it is cleared by debugger, p_xthread may be
     used by debugger to indicate CURRENT thread. The p_xstat is still
     in proc structure to keep wait() to work, in future, we may
     just use td_xsig.

  3. Add TDF_DBSUSPEND flag, the flag is used by debugger to suspend
     a thread. When process stops, debugger can set the flag for
     thread, thread will check the flag in thread_suspend_check,
     enters a loop, unless it is cleared by debugger, process is
     detached or process is existing. The flag is also checked in
     ptracestop, so debugger can temporarily suspend a thread even
     if the thread wants to exchange signal.

  4. Current, in ptrace, we always resume all threads, but if a thread
     has already a TDF_DBSUSPEND flag set by debugger, it won't run.

Encouraged by: marcel, julian, deischen
2004-07-13 07:33:40 +00:00
..
bus_if.m Introduce BUS_CONFIG_INTR(). The method allows devices to tell parents 2003-09-10 21:37:10 +00:00
clock_if.m Add a generic implementation of inittodr() and resettodr(), as well as 2002-04-04 23:39:10 +00:00
device_if.m Expand and rewrite documentation using doxygen markup so that we can 2004-07-11 16:17:42 +00:00
genassym.sh Allow one to specify the AWK used in the environment(commandline). 2002-02-11 03:54:30 +00:00
imgact_aout.c Change the types of vn_rdwr_inchunks()'s len and aresid arguments to 2004-06-05 02:18:28 +00:00
imgact_elf.c Allocate TIDs in thread_init() and deallocate them in thread_fini(). 2004-06-26 18:58:22 +00:00
imgact_elf32.c Use __FBSDID(). 2003-06-11 00:56:59 +00:00
imgact_elf64.c Use __FBSDID(). 2003-06-11 00:56:59 +00:00
imgact_gzip.c Locking for the per-process resource limits structure. 2004-02-04 21:52:57 +00:00
imgact_shell.c Use __FBSDID(). 2003-06-11 00:56:59 +00:00
inflate.c Use __FBSDID(). 2003-06-11 00:56:59 +00:00
init_main.c Make VFS_ROOT() and vflush() take a thread argument. 2004-07-12 08:14:09 +00:00
init_sysent.c Regen. 2004-07-02 00:38:56 +00:00
kern_acct.c Second half of the dev_t cleanup. 2004-06-17 17:16:53 +00:00
kern_acl.c Update my personal copyrights and NETA copyrights in the kernel 2004-02-22 00:33:12 +00:00
kern_alq.c Allow MAC policies to block/revoke kern_alq write access to a file. 2003-10-25 16:10:41 +00:00
kern_clock.c Update for the KDB framework: 2004-07-10 21:36:01 +00:00
kern_condvar.c Remove the signal_caught argument from sleepq_timedwait() as it was 2004-06-28 18:57:06 +00:00
kern_conf.c Better descriptions of the cdev malloc class and mutex. 2004-07-11 19:26:43 +00:00
kern_context.c Change the clear_ret argument of get_mcontext() to be a flags argument. 2003-11-09 20:31:04 +00:00
kern_descrip.c Explicitly initialize f_data and f_vnode to NULL. 2004-06-19 11:40:08 +00:00
kern_environment.c If the buffer supplied to kenv(KENV_DUMP, ...) isn't big enough, 2004-04-28 01:27:33 +00:00
kern_event.c Introduce a new kevent filter. EVFILT_FS that will be used to signal 2004-07-04 10:52:54 +00:00
kern_exec.c Push down the acquisition and release of the page queues lock into 2004-07-13 02:49:22 +00:00
kern_exit.c Add code to support debugging threaded process. 2004-07-13 07:20:10 +00:00
kern_fork.c Allocate TIDs in thread_init() and deallocate them in thread_fini(). 2004-06-26 18:58:22 +00:00
kern_idle.c - Change mi_switch() and sched_switch() to accept an optional thread to 2004-07-02 19:09:50 +00:00
kern_intr.c Implement preemption of kernel threads natively in the scheduler rather 2004-07-02 20:21:44 +00:00
kern_jail.c Add two missing includes and remove two uneeded. 2004-06-27 09:03:22 +00:00
kern_kse.c Add code to support debugging threaded process. 2004-07-13 07:33:40 +00:00
kern_kthread.c Use __FBSDID(). 2003-06-11 00:56:59 +00:00
kern_ktr.c Update the license on this file to be a bit more sane. 2003-09-10 01:09:32 +00:00
kern_ktrace.c Clean up and wash struct iovec and struct uio handling. 2004-07-10 15:42:16 +00:00
kern_linker.c Trim a few things from the dmesg output and stick them under bootverbose to 2004-07-01 07:46:29 +00:00
kern_lock.c Move TDF_DEADLKTREAT into td_pflags (and rename it accordingly) to avoid 2004-06-03 01:47:37 +00:00
kern_lockf.c Remove advertising clause from University of California Regent's license, 2004-04-05 21:03:37 +00:00
kern_mac.c Add /* !MAC */ to final #endif. 2004-05-03 22:54:46 +00:00
kern_malloc.c Update for the KDB framework: 2004-07-10 21:36:01 +00:00
kern_mbuf.c Fix a couple of bugs in the mbuf and packet ctors. In the latter case, 2004-06-01 16:17:10 +00:00
kern_mib.c Remove advertising clause from University of California Regent's license, 2004-04-05 21:03:37 +00:00
kern_module.c Use __FBSDID(). 2003-06-11 00:56:59 +00:00
kern_mtxpool.c Rearrange the SYSINIT order to call lockmgr_init() earlier so that 2003-07-16 01:00:39 +00:00
kern_mutex.c Update for the KDB framework: 2004-07-10 21:36:01 +00:00
kern_ntptime.c Annual NTP kernel code spring-cleaning: 2004-03-14 15:23:05 +00:00
kern_physio.c Do the dreaded s/dev_t/struct cdev */ 2004-06-16 09:47:26 +00:00
kern_poll.c Add a NULL param to an mi_switch() that I missed. 2004-07-03 02:38:03 +00:00
kern_proc.c Fill in the values for the ki_tid and ki_numthreads which have been 2004-06-20 22:17:22 +00:00
kern_prot.c Socket MAC labels so_label and so_peerlabel are now protected by 2004-06-13 02:50:07 +00:00
kern_resource.c Turned off the "calcru: negative time" warning for certain SMP cases 2004-06-21 17:46:27 +00:00
kern_sema.c Change the return value of sema_timedwait() so it returns 0 on 2004-06-14 18:19:05 +00:00
kern_shutdown.c Update for the KDB framework: 2004-07-10 21:36:01 +00:00
kern_sig.c Add code to support debugging threaded process. 2004-07-13 07:20:10 +00:00
kern_subr.c Clean up and wash struct iovec and struct uio handling. 2004-07-10 15:42:16 +00:00
kern_switch.c Update for the KDB framework: 2004-07-10 21:36:01 +00:00
kern_sx.c Fix _sx_assert() to panic() rather than printf() when an assertion fails 2004-02-27 16:13:44 +00:00
kern_synch.c Update for the KDB framework: 2004-07-10 21:36:01 +00:00
kern_syscalls.c Use __FBSDID(). 2003-06-11 00:56:59 +00:00
kern_sysctl.c Make sysctl_wire_old_buffer() respect ENOMEM from vslock() by marking 2004-06-11 02:20:37 +00:00
kern_tc.c Just because the timecounter reads the same value on two samples 2004-03-04 14:14:23 +00:00
kern_thr.c writers must hold both sched_lock and the process lock; therefore, readers 2004-07-12 15:28:31 +00:00
kern_thread.c Add code to support debugging threaded process. 2004-07-13 07:20:10 +00:00
kern_time.c Update previous commit to: 2004-06-21 22:34:57 +00:00
kern_timeout.c The paper "Hashed Timers and Hierarchical Wheels: Data Structures for the 2004-04-25 04:10:17 +00:00
kern_umtx.c writers must hold both sched_lock and the process lock; therefore, readers 2004-07-12 15:28:31 +00:00
kern_uuid.c Fix generation of random multicast MAC address. 2004-01-22 13:34:11 +00:00
kern_xxx.c Deorbit COMPAT_SUNOS. 2004-06-11 11:16:26 +00:00
ksched.c sched_setscheduler: Return EINVAL when a invalid policy is specified, 2003-09-13 18:46:24 +00:00
link_elf.c Make the GDB dynamic linker hooks (r_debug_state) conditional upon 2004-07-10 21:37:30 +00:00
link_elf_obj.c Wrap long line. 2004-06-29 03:13:54 +00:00
linker_if.m The method link_preload_finish is not static. 2003-09-20 17:39:32 +00:00
Make.tags.inc Finish driving a stake through the heart of netns and the associated 2003-03-05 19:24:24 +00:00
Makefile Finish driving a stake through the heart of netns and the associated 2003-03-05 19:24:24 +00:00
makesyscalls.sh Remove the namespace column from the syscalls tables. We don't actually 2003-12-23 03:50:43 +00:00
md4c.c Use __FBSDID(). 2003-06-11 00:56:59 +00:00
md5c.c Revert stuff which accidentally ended up in the previous commit. 2003-07-22 10:36:36 +00:00
p1003_1b.c Use __FBSDID(). 2003-06-11 06:34:30 +00:00
posix4_mib.c Use __FBSDID(). 2003-06-11 06:34:30 +00:00
sched_4bsd.c Implement preemption of kernel threads natively in the scheduler rather 2004-07-02 20:21:44 +00:00
sched_ule.c Update for the KDB framework: 2004-07-10 21:38:22 +00:00
subr_acl_posix1e.c Update my personal copyrights and NETA copyrights in the kernel 2004-02-22 00:33:12 +00:00
subr_autoconf.c Remove advertising clause from University of California Regent's license, 2004-04-05 21:03:37 +00:00
subr_blist.c Move the definitions of SWAPBLK_NONE and SWAPBLK_MASK from vm_page.h to 2004-06-04 04:03:26 +00:00
subr_bus.c Hide struct resource and struct rman. You must define 2004-06-30 16:54:10 +00:00
subr_clist.c Revert stuff which accidentally ended up in the previous commit. 2003-07-22 10:36:36 +00:00
subr_clock.c Remove advertising clause from University of California Regent's license, 2004-04-05 21:03:37 +00:00
subr_devstat.c Do the dreaded s/dev_t/struct cdev */ 2004-06-16 09:47:26 +00:00
subr_disk.c Report bio_pblkbo instead of bio_blkno. 2003-10-18 17:27:10 +00:00
subr_eventhandler.c Use __FBSDID(). 2003-06-11 00:56:59 +00:00
subr_hints.c Add a resource_disabled() helper function that returns true (non-zero) if 2003-07-02 16:01:38 +00:00
subr_kdb.c Make kdb_dbbe_select() available as an interface function. This allows 2004-07-12 01:15:55 +00:00
subr_kobj.c * Add multiple inheritance to kobj. Each class can have zero or more base 2003-10-16 09:16:28 +00:00
subr_log.c Do the dreaded s/dev_t/struct cdev */ 2004-06-16 09:47:26 +00:00
subr_mbpool.c Pass MTX_DEF as the last argument to mtx_init() instead of 0. This 2003-12-07 21:53:41 +00:00
subr_mchain.c Remove advertising clause from University of California Regent's license, 2004-04-05 21:03:37 +00:00
subr_module.c Use __FBSDID(). 2003-06-11 00:56:59 +00:00
subr_msgbuf.c Put the message about msgbuf cksum mismatch under bootverbose and tell 2003-09-05 11:12:00 +00:00
subr_param.c Remove advertising clause from University of California Regent's license, 2004-04-05 21:03:37 +00:00
subr_pcpu.c Use __FBSDID(). 2003-06-11 00:56:59 +00:00
subr_power.c Move the kernel power change printf under bootverbose since the 2004-01-02 18:24:13 +00:00
subr_prf.c Update for the KDB framework: 2004-07-10 21:43:23 +00:00
subr_prof.c Tidy up uprof locking. Mostly the fields are protected by both the proc 2004-07-02 03:50:48 +00:00
subr_rman.c Add ability to set start/end for rman 2004-07-01 16:22:10 +00:00
subr_rtc.c Remove advertising clause from University of California Regent's license, 2004-04-05 21:03:37 +00:00
subr_sbuf.c Cosmetic adjustment to previous commit: name the second argument to 2004-07-09 11:37:44 +00:00
subr_scanf.c Remove advertising clause from University of California Regent's license, 2004-04-05 21:03:37 +00:00
subr_sleepqueue.c - Change mi_switch() and sched_switch() to accept an optional thread to 2004-07-02 19:09:50 +00:00
subr_smp.c Move the CPU newbus attachment to i386 legacy. The acpi_cpu device will 2004-05-06 15:54:02 +00:00
subr_taskqueue.c - Execute all of the tasks on the taskqueue during taskqueue_free() after 2004-06-28 16:28:23 +00:00
subr_trap.c - Change mi_switch() and sched_switch() to accept an optional thread to 2004-07-02 19:09:50 +00:00
subr_turnstile.c - Change mi_switch() and sched_switch() to accept an optional thread to 2004-07-02 19:09:50 +00:00
subr_witness.c Update for the KDB framework: 2004-07-10 21:42:16 +00:00
sys_generic.c Clean up and wash struct iovec and struct uio handling. 2004-07-10 15:42:16 +00:00
sys_pipe.c Revise the direct or optimized case to use uiomove_fromphys() by the reader 2004-03-27 19:50:23 +00:00
sys_process.c Implement following commands: PT_CLEARSTEP, PT_SETSTEP, PT_SUSPEND 2004-07-13 07:25:24 +00:00
sys_socket.c Annotate two intentionally unlocked reads with comments. 2004-06-20 17:35:50 +00:00
syscalls.c Regen. 2004-07-02 00:38:56 +00:00
syscalls.master Change kse_switchin to accept kse_thr_mailbox pointer, the syscall 2004-07-12 07:39:20 +00:00
sysv_ipc.c Use __FBSDID(). 2003-06-11 00:56:59 +00:00
sysv_msg.c Add missing #include <sys/module.h> 2004-05-30 20:34:58 +00:00
sysv_sem.c Add missing #include <sys/module.h> 2004-05-30 20:34:58 +00:00
sysv_shm.c Eliminate struct shm_handle. It is an unnecessary level of indirection to 2004-07-09 05:28:38 +00:00
tty.c Introduce ttygone() which indicates that the hardware is detached. 2004-07-11 15:18:39 +00:00
tty_compat.c Put the pre FreeBSD-2.x tty compat code under BURN_BRIDGES. 2004-06-21 22:57:16 +00:00
tty_conf.c Do the dreaded s/dev_t/struct cdev */ 2004-06-16 09:47:26 +00:00
tty_cons.c Update for the KDB framework: 2004-07-10 21:43:23 +00:00
tty_pty.c Gah! commit from wrong tree. 2004-06-25 22:10:20 +00:00
tty_subr.c Revert stuff which accidentally ended up in the previous commit. 2003-07-22 10:36:36 +00:00
tty_tty.c Second half of the dev_t cleanup. 2004-06-17 17:16:53 +00:00
uipc_accf.c Add a global mutex, accept_filter_mtx, to protect the global list of 2004-06-01 04:08:48 +00:00
uipc_cow.c In some cases, sf_buf_alloc() should sleep with pri PCATCH; in others, it 2004-04-03 09:16:27 +00:00
uipc_domain.c Remove advertising clause from University of California Regent's license, 2004-04-05 21:03:37 +00:00
uipc_jumbo.c Lock the vm object when removing a page. 2003-06-11 21:23:04 +00:00
uipc_mbuf.c Gah! Plug a mbuf leak I introduced in the last commit. 2004-06-11 18:17:25 +00:00
uipc_mbuf2.c Bring in mbuma to replace mballoc. 2004-05-31 21:46:06 +00:00
uipc_proto.c Remove advertising clause from University of California Regent's license, 2004-04-05 21:03:37 +00:00
uipc_sem.c Add missing #include <sys/module.h> 2004-05-30 20:34:58 +00:00
uipc_sockbuf.c Reduce the number of unnecessary unlock-relocks on socket buffer mutexes 2004-06-26 19:10:39 +00:00
uipc_socket.c Rename Alfred's kern_setsockopt to so_setsockopt, as this seems a 2004-07-12 21:42:33 +00:00
uipc_socket2.c Reduce the number of unnecessary unlock-relocks on socket buffer mutexes 2004-06-26 19:10:39 +00:00
uipc_syscalls.c Clean up and wash struct iovec and struct uio handling. 2004-07-10 15:42:16 +00:00
uipc_usrreq.c We allocate an array of pointers to the global file table while 2004-07-02 07:40:10 +00:00
vfs_acl.c Update my personal copyrights and NETA copyrights in the kernel 2004-02-22 00:33:12 +00:00
vfs_aio.c Merge additional socket buffer locking from rwatson_netperf: 2004-06-17 22:48:11 +00:00
vfs_bio.c Fix bug introduced in rev 1.434: 2004-07-06 23:40:40 +00:00
vfs_cache.c Remove advertising clause from University of California Regent's license, 2004-04-05 21:03:37 +00:00
vfs_cluster.c Remove advertising clause from University of California Regent's license, 2004-04-05 21:03:37 +00:00
vfs_default.c Make VFS_ROOT() and vflush() take a thread argument. 2004-07-12 08:14:09 +00:00
vfs_export.c Make VFS_ROOT() and vflush() take a thread argument. 2004-07-12 08:14:09 +00:00
vfs_extattr.c Make VFS_ROOT() and vflush() take a thread argument. 2004-07-12 08:14:09 +00:00
vfs_init.c do the vfsstd thing instead of messing up our VFS_SYSCTL macro. 2004-07-07 06:58:29 +00:00
vfs_lookup.c Make VFS_ROOT() and vflush() take a thread argument. 2004-07-12 08:14:09 +00:00
vfs_mount.c Make VFS_ROOT() and vflush() take a thread argument. 2004-07-12 08:14:09 +00:00
vfs_subr.c Make VFS_ROOT() and vflush() take a thread argument. 2004-07-12 08:14:09 +00:00
vfs_syscalls.c Make VFS_ROOT() and vflush() take a thread argument. 2004-07-12 08:14:09 +00:00
vfs_vnops.c Update for the KDB framework: 2004-07-10 21:47:53 +00:00
vnode_if.src Remove advertising clause from University of California Regent's license, 2004-04-05 21:03:37 +00:00