minix/lib/ansi
David van Moolenbroek b423d7b477 Merge of David's ptrace branch. Summary:
o Support for ptrace T_ATTACH/T_DETACH and T_SYSCALL
o PM signal handling logic should now work properly, even with debuggers
  being present
o Asynchronous PM/VFS protocol, full IPC support for senda(), and
  AMF_NOREPLY senda() flag

DETAILS

Process stop and delay call handling of PM:
o Added sys_runctl() kernel call with sys_stop() and sys_resume()
  aliases, for PM to stop and resume a process
o Added exception for sending/syscall-traced processes to sys_runctl(),
  and matching SIGKREADY pseudo-signal to PM
o Fixed PM signal logic to deal with requests from a process after
  stopping it (so-called "delay calls"), using the SIGKREADY facility
o Fixed various PM panics due to race conditions with delay calls versus
  VFS calls
o Removed special PRIO_STOP priority value
o Added SYS_LOCK RTS kernel flag, to stop an individual process from
  running while modifying its process structure

Signal and debugger handling in PM:
o Fixed debugger signals being dropped if a second signal arrives when
  the debugger has not retrieved the first one
o Fixed debugger signals being sent to the debugger more than once
o Fixed debugger signals unpausing process in VFS; removed PM_UNPAUSE_TR
  protocol message
o Detached debugger signals from general signal logic and from being
  blocked on VFS calls, meaning that even VFS can now be traced
o Fixed debugger being unable to receive more than one pending signal in
  one process stop
o Fixed signal delivery being delayed needlessly when multiple signals
  are pending
o Fixed wait test for tracer, which was returning for children that were
  not waited for
o Removed second parallel pending call from PM to VFS for any process
o Fixed process becoming runnable between exec() and debugger trap
o Added support for notifying the debugger before the parent when a
  debugged child exits
o Fixed debugger death causing child to remain stopped forever
o Fixed consistently incorrect use of _NSIG

Extensions to ptrace():
o Added T_ATTACH and T_DETACH ptrace request, to attach and detach a
  debugger to and from a process
o Added T_SYSCALL ptrace request, to trace system calls
o Added T_SETOPT ptrace request, to set trace options
o Added TO_TRACEFORK trace option, to attach automatically to children
  of a traced process
o Added TO_ALTEXEC trace option, to send SIGSTOP instead of SIGTRAP upon
  a successful exec() of the tracee
o Extended T_GETUSER ptrace support to allow retrieving a process's priv
  structure
o Removed T_STOP ptrace request again, as it does not help implementing
  debuggers properly
o Added MINIX3-specific ptrace test (test42)
o Added proper manual page for ptrace(2)

Asynchronous PM/VFS interface:
o Fixed asynchronous messages not being checked when receive() is called
  with an endpoint other than ANY
o Added AMF_NOREPLY senda() flag, preventing such messages from
  satisfying the receive part of a sendrec()
o Added asynsend3() that takes optional flags; asynsend() is now a
  #define passing in 0 as third parameter
o Made PM/VFS protocol asynchronous; reintroduced tell_fs()
o Made PM_BASE request/reply number range unique
o Hacked in a horrible temporary workaround into RS to deal with newly
  revealed RS-PM-VFS race condition triangle until VFS is asynchronous

System signal handling:
o Fixed shutdown logic of device drivers; removed old SIGKSTOP signal
o Removed is-superuser check from PM's do_procstat() (aka getsigset())
o Added sigset macros to allow system processes to deal with the full
  signal set, rather than just the POSIX subset

Miscellaneous PM fixes:
o Split do_getset into do_get and do_set, merging common code and making
  structure clearer
o Fixed setpriority() being able to put to sleep processes using an
  invalid parameter, or revive zombie processes
o Made find_proc() global; removed obsolete proc_from_pid()
o Cleanup here and there

Also included:
o Fixed false-positive boot order kernel warning
o Removed last traces of old NOTIFY_FROM code

THINGS OF POSSIBLE INTEREST

o It should now be possible to run PM at any priority, even lower than
  user processes
o No assumptions are made about communication speed between PM and VFS,
  although communication must be FIFO
o A debugger will now receive incoming debuggee signals at kill time
  only; the process may not yet be fully stopped
o A first step has been made towards making the SYSTEM task preemptible
2009-09-30 09:57:22 +00:00
..
abort.c Split of architecture-dependent and -independent functions for i386, 2006-12-22 15:22:27 +00:00
abs.c Initial revision 2005-04-21 14:53:53 +00:00
assert.c Initial revision 2005-04-21 14:53:53 +00:00
atexit.c Initial revision 2005-04-21 14:53:53 +00:00
atof.c Initial revision 2005-04-21 14:53:53 +00:00
atoi.c Initial revision 2005-04-21 14:53:53 +00:00
atol.c Initial revision 2005-04-21 14:53:53 +00:00
bsearch.c Initial revision 2005-04-21 14:53:53 +00:00
calloc.c Initial revision 2005-04-21 14:53:53 +00:00
chartab.c Initial revision 2005-04-21 14:53:53 +00:00
clock.c Initial revision 2005-04-21 14:53:53 +00:00
difftime.c Initial revision 2005-04-21 14:53:53 +00:00
div.c Initial revision 2005-04-21 14:53:53 +00:00
errlist.c Added ERESTART 2008-02-21 16:00:39 +00:00
exit.c Initial revision 2005-04-21 14:53:53 +00:00
ext_comp.c Initial revision 2005-04-21 14:53:53 +00:00
ext_fmt.h Initial revision 2005-04-21 14:53:53 +00:00
getenv.c Initial revision 2005-04-21 14:53:53 +00:00
isalnum.c Initial revision 2005-04-21 14:53:53 +00:00
isalpha.c Initial revision 2005-04-21 14:53:53 +00:00
isascii.c Initial revision 2005-04-21 14:53:53 +00:00
iscntrl.c Initial revision 2005-04-21 14:53:53 +00:00
isdigit.c Initial revision 2005-04-21 14:53:53 +00:00
isgraph.c Initial revision 2005-04-21 14:53:53 +00:00
islower.c Initial revision 2005-04-21 14:53:53 +00:00
isprint.c Initial revision 2005-04-21 14:53:53 +00:00
ispunct.c Initial revision 2005-04-21 14:53:53 +00:00
isspace.c Initial revision 2005-04-21 14:53:53 +00:00
isupper.c Initial revision 2005-04-21 14:53:53 +00:00
isxdigit.c Initial revision 2005-04-21 14:53:53 +00:00
labs.c Initial revision 2005-04-21 14:53:53 +00:00
ldiv.c Initial revision 2005-04-21 14:53:53 +00:00
loc_time.h Initial revision 2005-04-21 14:53:53 +00:00
localeconv.c Initial revision 2005-04-21 14:53:53 +00:00
Makefile.in replace library time handling functions 2007-03-30 15:36:49 +00:00
malloc.c Initial revision 2005-04-21 14:53:53 +00:00
mblen.c Initial revision 2005-04-21 14:53:53 +00:00
mbstowcs.c Initial revision 2005-04-21 14:53:53 +00:00
mbtowc.c Initial revision 2005-04-21 14:53:53 +00:00
memchr.c Initial revision 2005-04-21 14:53:53 +00:00
memcmp.c Initial revision 2005-04-21 14:53:53 +00:00
memcpy.c Initial revision 2005-04-21 14:53:53 +00:00
memmove.c Initial revision 2005-04-21 14:53:53 +00:00
memset.c Initial revision 2005-04-21 14:53:53 +00:00
misc.c replace library time handling functions 2007-03-30 15:36:49 +00:00
qsort.c Initial revision 2005-04-21 14:53:53 +00:00
raise.c Initial revision 2005-04-21 14:53:53 +00:00
rand.c Initial revision 2005-04-21 14:53:53 +00:00
setlocale.c Initial revision 2005-04-21 14:53:53 +00:00
sigmisc.c Initial revision 2005-04-21 14:53:53 +00:00
signal.c Merge of David's ptrace branch. Summary: 2009-09-30 09:57:22 +00:00
strcat.c Initial revision 2005-04-21 14:53:53 +00:00
strchr.c Initial revision 2005-04-21 14:53:53 +00:00
strcmp.c Initial revision 2005-04-21 14:53:53 +00:00
strcoll.c Initial revision 2005-04-21 14:53:53 +00:00
strcpy.c Initial revision 2005-04-21 14:53:53 +00:00
strcspn.c Initial revision 2005-04-21 14:53:53 +00:00
strerror.c Initial revision 2005-04-21 14:53:53 +00:00
strlen.c Initial revision 2005-04-21 14:53:53 +00:00
strncat.c Initial revision 2005-04-21 14:53:53 +00:00
strncmp.c Initial revision 2005-04-21 14:53:53 +00:00
strncpy.c Initial revision 2005-04-21 14:53:53 +00:00
strpbrk.c Initial revision 2005-04-21 14:53:53 +00:00
strrchr.c Initial revision 2005-04-21 14:53:53 +00:00
strspn.c Initial revision 2005-04-21 14:53:53 +00:00
strstr.c Initial revision 2005-04-21 14:53:53 +00:00
strtok.c Initial revision 2005-04-21 14:53:53 +00:00
strtol.c Initial revision 2005-04-21 14:53:53 +00:00
strxfrm.c Initial revision 2005-04-21 14:53:53 +00:00
system.c Merge of VFS by Balasz Gerofi with Minix trunk. 2006-10-25 13:40:36 +00:00
tolower.c Initial revision 2005-04-21 14:53:53 +00:00
toupper.c Initial revision 2005-04-21 14:53:53 +00:00
wcstombs.c Initial revision 2005-04-21 14:53:53 +00:00
wctomb.c Initial revision 2005-04-21 14:53:53 +00:00