than one active reference to a file descriptor. It should dislodge threads
sleeping while holding a reference to the descriptor. Implemented only for
sockets but should be extended to pipes, fifos, etc.
Fixes the case of a multithreaded process doing something like the
following, which would have hung until the process got a signal.
thr0 accept(fd, ...)
thr1 close(fd)
address space available to processes. this limit exists in most other
modern unix variants, and like most of them, our defaults are unlimited.
remove the old mmap / rlimit.datasize hack.
- adds the VMCMD_STACK flag to all the stack-creation vmcmd callers.
it is currently unused, but was added a few years ago.
- add a pair of new process size values to kinfo_proc2{}. one is the
total size of the process memory map, and the other is the total size
adjusted for unused stack space (since most processes have a lot of
this...)
- patch sh, and csh to notice RLIMIT_AS. (in some cases, the alias
RLIMIT_VMEM was already present and used if availble.)
- patch ps, top and systat to notice the new k_vm_vsize member of
kinfo_proc2{}.
- update irix, svr4, svr4_32, linux and osf1 emulations to support
this information. (freebsd could be done, but that it's best left
as part of the full-update of compat/freebsd.)
this addresses PR 7897. it also gives correct memory usage values,
which have never been entirely correct (since mmap), and have been
very incorrect since jemalloc() was enabled.
tested on i386 and sparc64, build tested on several other platforms.
thanks to many folks for feedback and testing but most espcially
chuq and yamt for critical suggestions that lead to this patch not
having a special ugliness i wasn't happy with anyway :-)
to parse and generate the compat name and basename (e.g. __stat50
and stat). Use this to autogenerate __RENAME()'s to the rump_syscalls
header so that they can be called e.g. rump_sys_socket() instead
of rump_sys___socket30().
into modules. By and large this commit:
- shuffles header files and ifdefs
- splits code out where necessary to be modular
- adds module glue for each of the components
- adds/replaces hooks for things that can be installed at runtime
we no longer need to guard against access from hardware interrupt handlers.
Additionally, if cloning a process with CLONE_SIGHAND, arrange to have the
child process share the parent's lock so that signal state may be kept in
sync. Partially addresses PR kern/37437.
Attempt to fix all the code paths so that the 'fp' returned by fd_getfile()
isn't left locked, and is always unlocked (and ref-counted) before
doing anything that might sleep.
int foo(struct lwp *l, void *v, register_t *retval)
to:
int foo(struct lwp *l, const struct foo_args *uap, register_t *retval)
Fixup compat code to not write into 'uap' and (in some cases) to actually
pass a correctly formatted 'uap' structure with the right name to the
next routine.
A few 'compat' routines that just call standard ones have been deleted.
All the 'compat' code compiles (along with the kernels required to test
build it).
98% done by automated scripts.
Don't open-code queue(3) macros (x = ifnet.tqh_first; y =
x.if_list.tqe_next). Instead, use the macros themselves.
Use IFNET_FOREACH() and IFADDR_FOREACH().
values of the SS_ONSTACK and SS_DISABLE constants.
Use it to shorten the source files when this action is replicated.
Actually, given the monstrous complexity of sigaltstack1() there is
probably a much better way to do this...
once the 'address' has been copied into an mbuf.
Add extra flags for 'struct msghdr.msg_flags' to indicate that the address
and control are already in mbufs, and that the uio structure is in userspace
for sending data, rename sendit() to do_sys_sendmsg() to ensure no old code
passes in random flags.
Changes to compat code to use new functions - removing some stackgap use.
Fix a 'use after free' in compat_43_sys_recvmsg.
I ***THINK*** the code that converts 'cmsg' formatted data is borked!
svr4_stream.c ought to be generated from svr4_32_stream.c during the build.
compatibility with the older ioctls. This avoids stack smashing and
abuse of "struct sockaddr" when ioctls placed "struct sockaddr_foo's" that
were longer than "struct sockaddr".
XXX: Some of the emulations might be broken; I tried to add code for
them but I did not test them.
Make the same changes to the svr4 code.
Add some 'missing' simple_unlock(&fp->f_slock) to the svr4_32 version of this
code. These files now compare if feed the svr4_32 copy though:
sed -e 's/4_32/4/g;s/_P32//g'
Note in passing that the code paths that call simple_unlock(&fp->f_slock)
are completely broken.
