locking functions. If an application loads a shared object with
dlopen() and the shared object has an init function which requires
lazy binding, then _rtld_bind is called when the thread is already
inside the dynamic linker. This leads to a recursive acquisition
of the lock, which I was not expecting -- hence the assert failure.
This work-around makes the default locking functions handle recursive
locking. It is NOT the correct fix -- that should be implemented
at the generic locking level rather than in the default locking
functions. I will implement the correct fix in a future commit.
Since the dllockinit() interface will likely need to change, warn
about that in both the man page and the header file.
Fix some ctype problems - isascii() caused a warning if fed an unsigned
char - it's always > 0 and libstand is compiled with -Wall.
Missing prototype/include in printf.c
and is module aware. Yes, this means that kvm_nlist(3) will find symbols
in loaded modules. The emulation of the nlist struct is pretty crude but
seems to work well enough for all the users in the tree that I found.
functions to be used by the dynamic linker. This can be called by
threads packages at start-up time. I will add the call to libc_r
soon.
Also add a default locking method that is used up until dllockinit()
is called. The default method works by blocking SIGVTALRM, SIGPROF,
and SIGALRM in critical sections. It is based on the observation
that most user-space threads packages implement thread preemption
with one of these signals (usually SIGVTALRM).
The dynamic linker has never been reentrant, but it became less
reentrant in revision 1.34 of "src/libexec/rtld-elf/rtld.c".
Starting with that revision, multiple threads each doing lazy
binding could interfere with each other. The usual symptom was
that a symbol was falsely reported as undefined at start-up time.
It was rare but not unseen. This commit fixes it.
Doing the "right thing" here is difficult, so create two ENTRY points for
each function (for example, __setjmp and setjmp are equivalent). This
isn't pretty, but it works for both aout and ELF.
libc symbol naming needs an overhaul in order to properly support function
wrapping, specifically in the case of a real libpthread, and these
duplicate entry points should be fixed as part of that overhaul.
Pointed out by: bde
takes an int arg and is prototyped in <string.h>. It has the opposite
interface botches to psignal(3) which takes a bogus unsigned arg but is
prototyped in the right place.
This is not the last of the interface problems for strsignal(). We
obtained it from NetBSD, but NetBSD has moved its prototype to
<unistd.h>. strsignal() should return const char *, but it returns
char * for historical reasons. NetBSD declares it as returning
__aconst char, where __aconst is normally empty but can be set to
`const' to give better error checking. glibc-2.1.1 prototypes
strsignal() in <string.h>.
lobotomized environment, say booted from a floppy with no /etc full
of password and group files, give sensible fallbacks for roots uid
and operators gid.
This might fix sysinstall.
this makefile update which should have been together with the file
removal.
Removed vlimit.3 and vtimes.3. Removed vlimit.c and vtimes.c from
the "MISSING" list. These were old variants of get/setrlimit() and
getrusage(), respectively, and were never implemented in FreeBSD.
vlimit.3 referred to <sys/vlimit.h> which was removed recently.
vtimes.3 referred to <sys/vtimes.h> which never existed in FreeBSD.
the "MISSING" list. These were old variants of get/setrlimit() and
getrusage(), respectively, and were never implemented in FreeBSD.
vlimit.3 referred to <sys/vlimit.h> which was removed recently.
vtimes.3 referred to <sys/vtimes.h> which never existed in FreeBSD.
o Cancellation flags were not getting properly set/cleared.
o Loops waiting for internal locks were not being exited
correctly by a cancelled thread.
o Minor spelling (cancelation -> cancellation) and formatting
corrections (missing tab).
Found by: tg
Reviewed by: jasone
o Don't call signal handlers with the signal handler access lock
held.
o Remove pending signals before calling signal handlers. If
pending signals were not removed prior to handling them,
invocation of the handler could cause the handler to be
called more than once for the same signal. Found by: JB
o When SIGCHLD arrives, wake up all threads in PS_WAIT_WAIT
(wait4).
PR: bin/15328
Reviewed by: jasone
IPv6 specific library functions addition.
(getnameinfo(), getaddrinfo(), and IPv6 transport support is not yet)
Reviewed by: freebsd-arch, cvs-committers
Obtained from: KAME project
__setjmp, __longjmp, __sigsetjmp, and __siglongjmp, respectively.
This supports cancellation in the linuxthreads port. In the long run,
a much more comprehensive solution will necessitate more dramatic changes
to libc symbol naming, and these aliases will probably need modification
at that time.
MAN8+= rstat_svc.8
The file it talks about doesn't exist on FreeBSD, so there's no point in
installing the manual page. There was already a comment to this effect in
this file, but the entry hadn't been commented out.
rstat.1 and rstat_svc.8 can probably actually be removed.
PR: docs/13767
Submitted by: Seth <seth@freebie.dp.ny.frb.org>
madvise().
This feature prevents the update daemon from gratuitously flushing
dirty pages associated with a mapped file-backed region of memory. The
system pager will still page the memory as necessary and the VM system
will still be fully coherent with the filesystem. Modifications made
by other means to the same area of memory, for example by write(), are
unaffected. The feature works on a page-granularity basis.
MAP_NOSYNC allows one to use mmap() to share memory between processes
without incuring any significant filesystem overhead, putting it in
the same performance category as SysV Shared memory and anonymous memory.
Reviewed by: julian, alc, dg
is good for... :-)), I discovered that part of the change when mkstemps()
was brought in was missed - it was missing the termination case to make
sure it doesn't walk into the suffix. This isn't the same code OpenBSD
has, I think this is a little better as we terminate the loop in a better
spot.
Discuss in the BUGS section of the manpage, problems involved with
the use of %C, %e, %l, %p, %U and %W.
PR: 13901
Reported by: scott@chronis.pobox.com
Before this change, a signal was delivered to each thread that
didn't have the signal masked. Signals also improperly woke up
threads waiting on I/O. With this change, signals are now
handled in the following way:
o If a thread is waiting in a sigwait for the signal,
then the thread is woken up.
o If no threads are sigwait'ing on the signal and a
thread is in a sigsuspend waiting for the signal,
then the thread is woken up.
o In the case that no threads are waiting or suspended
on the signal, then the signal is delivered to the
first thread we find that has the signal unmasked.
o If no threads are waiting or suspended on the signal,
and no threads have the signal unmasked, then the signal
is added to the process wide pending signal set. The
signal will be delivered to the first thread that unmasks
the signal.
If there is an installed signal handler, it is only invoked
if the chosen thread was not in a sigwait.
In the case that multiple threads are waiting or suspended
on a signal, or multiple threads have the signal unmasked,
we wake up/deliver the signal to the first thread we find.
The above rules still apply.
Reported by: Scott Hess <scott@avantgo.com>
Reviewed by: jb, jasone
the environment. This allows big ID warnings to be suppressed for
vipw and chpass as well.
Since the environment variable test is only performed for callers
of pw_scan() that do not set pw_big_ids_warning, the test can still
be overriden. Currently, chpass and pwd_mkdb are the only users
of pw_scan() and neither of them overrides the environment variable
test.
NGM_BINARY2ASCII, which convert control messages to ASCII and back.
This allows control messages to be sent and received in ASCII form
using ngctl(8), which makes ngctl a lot more useful.
This also allows all the type-specific debugging code in libnetgraph
to go away -- instead, we just ask the node itself to do the ASCII
translation for us.
Currently, all generic control messages are supported, as well as
messages associated with the following node types: async, cisco,
ksocket, and ppp.
See /usr/share/examples/netgraph/ngctl for an example of using this.
Also give ngctl(8) the ability to print out incoming data and
control messages at any time. Eventually nghook(8) may be subsumed.
Several other misc. bug fixes.
Reviewed by: julian
readdir_r is not POSIX according to POSIX_SOURCE, bruce says:
> readdir_r() is in the _POSIX_SOURCE section, but is not a POSIX.1-1990
> function. It's POSIX.1-1996 so it should be under a different feature
> test which we don't support yet.
make sure errno is saved so that its contents are cleared unless
necessary.
Submitted by: bde
"login auth sufficient pam_ssh.so" to your /etc/pam.conf, and
users with a ~/.ssh/identity can login(1) with their SSH key :)
PR: 15158
Submitted by: Andrew J. Korty <ajk@waterspout.com>
Reviewed by: obrien
to use mmap(..., MAP_STACK, ...) on alpha too since that should work
now.
* Add hooks to allow GDB to access the internals of pthreads without
having to know the exact layout of struct pthread.
Reviewed by: deischen
eischen (Daniel Eischen) added wrappers to protect against cancled
threads orphaning internal resources.
the cancelability code is still a bit fuzzy but works for test
programs of my own, OpenBSD's and some examples from ORA's books.
add readdir_r to both libc and libc_r
add some 'const' attributes to function parameters
Reviewed by: eischen, jasone
with NetBSD and the Single Unix Specification v2.
This updates some structures with other, almost equivalent types and
effort is under way to get the whole more consistent.
Also removes a double definition of INET6 and some other clean-ups.
Reviewed by: green, bde, phk
Some part obtained from: NetBSD, SUSv2 specification
