various sysctl/procfs interfaces that allow it to be interrogated.
(This is rather than the temporary parent's pid when a process is
being traced and has been reparented.)
XXX The ppid in elf32 core files has not been similarly adjusted,
XXX Should it be ?
change anything, since kernel processes use the shared kernel map instead
of the one they are given here. For consistency though, it is better to
make sure UVM will not be tempted to access machine-dependent reserved
areas (e.g., the PTE space on x86).
mprotect settings so that debuggers can write to the text segment of traced
processes so that they can insert breakpoints. Turned off by default.
Ok: chuq (for now)
on context) into:
1. p_xexit: exit code
2. p_xsig: signal number
3. p_sflag & WCOREFLAG bit to indicated that the process core-dumped.
Fix the documentation of the flag bits in <sys/proc.h>
is a global sysctl kern.maxlwp to control this, which is by default 2048.
The first lwp of each process or kernel threads are not counted against the
limit. To show the current resource usage per user, I added a new sysctl
that dumps the uidinfo structure fields.
This value seems to never have been used anywhere.
This makes it consistent with it's cousin p_vm_msize (which is in pages as
well and has several uses).
version or the 32bit compat layout in execve1. Introduce a new function
copyin_psstrings for reading it back from userland and converting it to
the native layout. Refactor procfs to share most of the code with the
kern.proc_args sysctl handler.
This material is based upon work partially supported by
The NetBSD Foundation under a contract with Joerg Sonnenberger.
- update the linux syscall table for each platform.
- support new-style (NPTL) linux pthreads on all platforms.
clone() with CLONE_THREAD uses 1 process with many LWPs
instead of separate processes.
- move the contents of sys__lwp_setprivate() into a new
lwp_setprivate() and use that everywhere.
- update linux_release[] and linux32_release[] to "2.6.18".
- adjust placement of emul fork/exec/exit hooks as needed
and adjust other emul code to match.
- convert all struct emul definitions to use named initializers.
- change the pid allocator to allow multiple pids to refer to the same proc.
- remove a few fields from struct proc that are no longer needed.
- disable the non-functional "vdso" code in linux32/amd64,
glibc works fine without it.
- fix a race in the futex code where we could miss a wakeup after
a requeue operation.
- redo futex locking to be a little more efficient.
Rename real routines to proc_find() and pgrp_find(), remove PFIND_* flags
and have consistent behaviour. Provide proc_find_raw() for special cases.
Fix memory leak in sysctl_proc_corename().
COMPAT_LINUX: rework ptrace() locking, minimise differences between
different versions per-arch.
Note: while this change adds some formal cosmetics for COMPAT_DARWIN and
COMPAT_IRIX - locking there is utterly broken (for ages).
Fixes PR/43176.
to it from kern_proc.c to kern_lwp.c. This makes kern_proc
"scheduling-clean" and more easily usable in environments with a
non-integrated scheduler (like, to take a random example, rump).
to the total free memory available to the system, use the smallest value
between VM_MAXUSER_ADDRESS and total free memory (having a RSS limit
bigger than VM_MAXUSER_ADDRESS has no real meaning).
Fix a possible int overflow when ptoa(uvmexp.free) is bigger than 4GB
with a 32 bits vaddr_t.
This change is similar to the one made in rev 1.144 of uvm/uvm_glue.c.
DTrace adds a pointer to the lwp and proc structures which it uses to
manage its state. These are opaque from the kernel perspective to keep
the kernel free of CDDL code. The state arenas are kmem_alloced and freed
as proccesses and threads are created and destoyed.
Also add a check for trap06 (privileged/illegal instruction) so that
DTrace can check for D scripts that may have triggered the trap so it
can clean up after them and resume normal operation.
Ok with core@.
- Addresses the issue described in PR/38828.
- Some simplification in threading and sleepq subsystems.
- Eliminates pmap_collect() and, as a side note, allows pmap optimisations.
- Eliminates XS_CTL_DATA_ONSTACK in scsipi code.
- Avoids few scans on LWP list and thus potentially long holds of proc_lock.
- Cuts ~1.5k lines of code. Reduces amd64 kernel size by ~4k.
- Removes __SWAP_BROKEN cases.
Tested on x86, mips, acorn32 (thanks <mpumford>) and partly tested on
acorn26 (thanks to <bjh21>).
Discussed on <tech-kern>, reviewed by <ad>.
proc_enterpgrp() with proc_leavepgrp() to free process group and/or
session without proc_lock held.
- Rename SESSHOLD() and SESSRELE() to to proc_sesshold() and
proc_sessrele(). The later releases proc_lock now.
Quick OK by <ad>.
