as the death entries of a deceased processes that were in this group
and have not yet been reaped hold references to the group, so that it
won't be deleted until the group is empty and all gone group members
have been reaped. This fixes#1799 at last.
git-svn-id: file:///srv/svn/repos/haiku/haiku/trunk@24335 a95241bf-73f2-0310-859d-f6bbb57e9c96
* Added team::flags. Currently only used for setting a flag when a team
has exec()ed.
* Some improvements of _user_setpgid():
- It failed incorrectly when the target process was a process group
leader. According to the standard it shall fail when the process is
a session leader. Moving a process group leader to another process
group is fine, even if that leaves the group leaderless.
- Fixed race conditions. We need to recheck the error conditions when
we hold the team spinlock. Otherwise the situation could change
while we allocated the new process group. This was one of the
reasons for bug #1799 -- after the shell fork()'s both parent and
child invoke setpgid() for the child.
- Fixed behavior for pid == pgid. It doesn't necessarily mean that a
new group has to be created.
- Fixed update of target process group orphaned state.
- Squashed TODO: setpgid() on a child is supposed to fail after the
child has exec()ed.
git-svn-id: file:///srv/svn/repos/haiku/haiku/trunk@24041 a95241bf-73f2-0310-859d-f6bbb57e9c96
* Implemented automatic syscall restarts:
- A syscall can indicate that it has been interrupted and can be
restarted by setting a respective bit in thread::flags. It can
store parameters it wants to be preserved for the restart in
thread::syscall_restart::parameters. Another thread::flags bit
indicates whether it has been restarted.
- handle_signals() clears the restart flag, if the handled signal
has a handler function installed and SA_RESTART is not set. Another
thread flag (THREAD_FLAGS_DONT_RESTART_SYSCALL) can prevent syscalls
from being restarted, even if they could be (not used yet, but we
might want to use it in resume_thread(), so that we stay
behaviorally compatible with BeOS).
- The architecture specific syscall handler restarts the syscall, if
the restart flag is set. Implemented for x86 only.
- Added some support functions in the private <syscall_restart.h> to
simplify the syscall restart code in the syscalls.
- Adjusted all syscalls that can potentially be restarted accordingly.
- _user_ioctl() sets new thread flag THREAD_FLAGS_IOCTL_SYSCALL while
calling the underlying FS's/driver's hook, so that syscall restarts
can also be supported there.
* thread_at_kernel_exit() invokes handle_signals() in a loop now, as
long as the latter indicates that the thread shall be suspended, so
that after waking up signals received in the meantime will be handled
before the thread returns to userland. Adjusted handle_signals()
accordingly -- when encountering a suspending signal we don't check
for further signals.
* Fixed sigsuspend(): Suspending the thread and rescheduling doesn't
result in the correct behavior. Instead we employ a temporary
condition variable and interruptably wait on it. The POSIX test
suite test passes, now.
* Made the switch_sem[_etc]() behavior on interruption consistent.
Depending on when the signal arrived (before the call or when already
waiting) the first semaphore would or wouldn't be released. Now we
consistently release it.
* Refactored _user_{read,write}[v]() syscalls. Use a common function for
either pair. The iovec version doesn't fail anymore, if anything could
be read/written at all. It also checks whether a complete vector
could be read/written, so that we won't skip data, if the underlying
FS/driver couldn't read/write more ATM.
* Some refactoring in the x86 syscall handler: The int 99 and sysenter
handlers use a common subroutine to avoid code duplication.
git-svn-id: file:///srv/svn/repos/haiku/haiku/trunk@23983 a95241bf-73f2-0310-859d-f6bbb57e9c96
"teams".
* "team" without arg prints info about the current team.
git-svn-id: file:///srv/svn/repos/haiku/haiku/trunk@23746 a95241bf-73f2-0310-859d-f6bbb57e9c96
path. Makes the "teams" output prettier and "team <name>" becomes
usable.
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This should be in line with all uses of scheduler_enqueue_in_run_queue() and
simplifies a few places where it is used.
git-svn-id: file:///srv/svn/repos/haiku/haiku/trunk@23738 a95241bf-73f2-0310-859d-f6bbb57e9c96
So now there's a central place to enable tracing in general and for
individual components.
git-svn-id: file:///srv/svn/repos/haiku/haiku/trunk@23645 a95241bf-73f2-0310-859d-f6bbb57e9c96
exit status of (non-main) threads of a team. Fixes bug #1644.
git-svn-id: file:///srv/svn/repos/haiku/haiku/trunk@23009 a95241bf-73f2-0310-859d-f6bbb57e9c96
* Removed old port test code, it doesn't belong there.
* Cleanup.
git-svn-id: file:///srv/svn/repos/haiku/haiku/trunk@22507 a95241bf-73f2-0310-859d-f6bbb57e9c96
team as well. Otherwise the children would later try to remove them from
a list they weren't in.
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group ID with the session and let the terminal update them.
* Added an "orphaned" flag to the process_group structure and code to
maintain it.
* Handle the death of a controlling process correctly: The
foreground process group gets a SIGHUP and all newly-orphaned process
groups containing at least one stopped processes are sent
SIGHUP+SIGCONT.
* The tty handles the O_NOCTTY flag correctly, now.
* The tty handles reads/writes from processes from other sessions
correctly, now.
* Handle tcsetpgrp() from background processes correctly.
git-svn-id: file:///srv/svn/repos/haiku/haiku/trunk@22187 a95241bf-73f2-0310-859d-f6bbb57e9c96
shadowing variables).
* Resolved TODO: We wake up the parent if waiting in wait_for_child()
now, if the process group changes.
* Added another TODO: setpgid() is supposed to fail on a child after
it has executed exec*().
git-svn-id: file:///srv/svn/repos/haiku/haiku/trunk@22185 a95241bf-73f2-0310-859d-f6bbb57e9c96
blocked and no other child status is available.
* Respect SA_NOCLDWAIT and ignored SIGCHLD in waitpid(): Unless a child
status is available immediately, the thread shall block until all
children are gone.
git-svn-id: file:///srv/svn/repos/haiku/haiku/trunk@22161 a95241bf-73f2-0310-859d-f6bbb57e9c96
space - but they were released upon deletion. It's probably not really
needed, but now all reserved areas also grab a reference to their address
space.
* Rearranged team tear down to be a bit more sane: the I/O context is removed
first (where semaphores/areas/ports/whatever might still be used), and the
address space is deleted last.
* delete_area() can now remove its address space reference again (due to the
two changes above), and therefore fixes bug #1374.
* cleaned up vm_address_space.c a bit (no functional change there, though).
git-svn-id: file:///srv/svn/repos/haiku/haiku/trunk@22130 a95241bf-73f2-0310-859d-f6bbb57e9c96
is used instead of death_entry for team::dead_children.
* Added team::{stopped,continued}_children, which, analoguously to
dead_children, are used to track the state of stopped/continued
children.
* A team does have a job_control_entry, which is allocated at team
creation time. It will be inserted into the parent's
{stopped,continued}_children lists as the team's main thread is
stopped/continued and removed when waitpid() retrieves the child
state. When the team dies the entry is detached from the team and goes
into the parent's dead_children list.
* Removed the wait_for_any field from team_dead_children. It was solely
used to avoid deletion of the contained entries in certain situations.
wait_for_child() (the waitpid() backend) always deletes an entry now,
regardless of whether other threads are waiting; that's in
accordance with the waidpid() specification. wait_for_thread() removes
the entry only, if the caller is the parent of the respective team.
* Introduced team_set_job_control_state() which performes the job
control entry transitions between the respective lists and wakes up
threads waiting in wait_for_child(). It is invoked on team death and
when the team's main thread receives job control signals.
* Reorganized wait_for_child(). It handles WCONTINUED and WUNTRACED now,
too. Removed a block that interpreted the supplied ID as thread ID.
* Added missing parts in waitpid().
Job control starts to work, though it seems to have some glitches.
git-svn-id: file:///srv/svn/repos/haiku/haiku/trunk@22088 a95241bf-73f2-0310-859d-f6bbb57e9c96
variable. Due to C code including the header I had to turn it from and
aggregated member to a pointer. I'm very close to starting to convert
all remaining .c to .cpp files. :-/
* Got rid of the "waiters" field. It was only written, never read.
git-svn-id: file:///srv/svn/repos/haiku/haiku/trunk@22084 a95241bf-73f2-0310-859d-f6bbb57e9c96
