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Commit Graph

5494 Commits

Author SHA1 Message Date
Robert Watson
b06619453f Move to more conformant style(9) before making functional changes. 2007-05-13 12:04:06 +00:00
Marius Strobl
ac474f9545 - Add bits for userland profiling. For sun4u this is compile-tested only.
- Replace magic 14 with PIL_TICK.
2007-05-11 23:43:55 +00:00
David Schultz
970a466c40 We should never zero-pad INF or NaN (yielding silly strings like "00inf")
even if the programmer asks for zero padding.
2007-05-08 03:08:28 +00:00
David Schultz
7f7c29db5e Fix a rounding error.
Reported by: Bruno Haible
2007-05-08 02:59:37 +00:00
Gabor Kovesdan
b9d8f1d9c7 - Fix typo
Approved by:	keramida (mentor)
MFC after:	3 days
2007-05-04 16:01:07 +00:00
Andrey A. Chernov
ba174a5e38 Back out all POSIXified *env() changes.
Not because I admit they are technically wrong and not because of bug
reports (I receive nothing). But because I surprisingly meets so
strong opposition and resistance so lost any desire to continue that.

Anyone who interested in POSIX can dig out what changes and how
through cvs diffs.
2007-05-01 16:02:44 +00:00
Andrey A. Chernov
fad6917924 Bump .Dd
Suggested by: Henrik Brix Andersen <henrik@brixandersen.dk>
2007-04-30 19:37:10 +00:00
Andrey A. Chernov
a7b27253d0 Add phrase
"so altering the argument shall change the environment."
into putenv description.
2007-04-30 18:01:51 +00:00
Andrey A. Chernov
15fdb055e5 Make putenv() fully conforms to Open Group specs Issue 6
(also IEEE Std 1003.1-2001)

The specs explicitly says that altering passed string
should change the environment, i.e. putenv() directly puts its arg
into environment (unlike setenv() which just copies it there).
It means that putenv() can't be implemented via setenv()
(like we have before) at all. Putenv() value lives (allows modifying)
up to the next putenv() or setenv() call.
2007-04-30 16:56:18 +00:00
Andrey A. Chernov
00f8652278 Remove special case skipping initial '=' of the setenv() value "for
compatibility with the different environment conventions" (man page).
With the standards, we don't have them different anymore and
IEEE Std 1003.1-2001 says that

"The values that the environment variables may be assigned are not
restricted except that they are considered to end with a null byte"
2007-04-30 03:47:31 +00:00
Andrey A. Chernov
bdda893471 Make setenv, putenv, getenv and unsetenv conforming to Open Group specs
Issue 6 (also IEEE Std 1003.1-2001) in following areas:
args, return, errors.

Putenv still needs rewriting because specs explicitly says that
altering passed string later should change the environment (currently we
copy the string so can't provide that).
2007-04-30 02:25:02 +00:00
Pawel Jakub Dawidek
a5fbf7ac1f Add missing links and sort. 2007-04-29 21:38:25 +00:00
Alexander Kabaev
15c096778f Make sure FBSDprivate_1.0 is located at the end of the version
inheritance chain.
2007-04-29 16:14:17 +00:00
Daniel Eischen
5f864214bb Use C comments since we now preprocess these files with CPP. 2007-04-29 14:05:22 +00:00
Daniel Eischen
8d3b75aa33 Number the private version namespace in case we ever want to have
compatibility between versions (as we do for the public namespace).
2007-04-29 14:03:45 +00:00
Peter Pentchev
0b329a103d Remove the MSG_PEEK flag from the documentation of the send(2) syscall -
it is only relevant to receiving data from sockets, not to sending.

PR:		109667
Submitted by:	Jari Kirma <kirma@cs.hut.fi>
Approved by:	wollman
2007-04-27 10:28:30 +00:00
Mike Makonnen
18a6073100 Make inet6_rth_* family of functions more compliant with RFC3542:
1. CMSG_NXTHDR(mhdr, cmsg) is supposed to dereference cmsg and return
   the next header in the chain. If cmsg is NULL it should return
   the first header, behaving essentially like CMSG_FIRSTHDR().
2. inet6_rth_(space|init|add) should do basic checking on their input
   to verify that the number of headers (segments) is
   between 0 and 127 inclusive.

MFC-After: 1 month
2007-04-19 15:48:16 +00:00
Poul-Henning Kamp
9436c1bf4b Grammer correction from: emaste 2007-04-19 14:01:04 +00:00
Poul-Henning Kamp
a0c079b341 Loosen return value spec for fputs to be standards compliant so people
don't program against our more restrictive behaviour.
2007-04-19 09:38:31 +00:00
Pawel Jakub Dawidek
e42e8df28f Cleanup sysconf(3) a bit. sysconf(3) assumes in some places it operates
on int, but in fact it should operate on long.
- Introduce 'lvalue' variable, which is long.
- Fix _SC_XOPEN_SHM for 64bit archs.
- Fix _SC_PHYS_PAGES for 64bit archs.
  Reported by:	simokawa
- Use lvalue for pathconf(3), as it returns long.
- Cast value explicitly to long on return.
2007-04-14 13:06:57 +00:00
Ed Maste
f82b931e69 Belatedly bump Dd for my recent changes. 2007-04-11 20:31:06 +00:00
Ruslan Ermilov
204542dd4c Expand the description of the host's UUID.
OK'ed by:	pjd
2007-04-10 11:19:52 +00:00
Ruslan Ermilov
41e0cfabe9 Swap "underflow"/"overflow" in the table header.
Submitted by:	Ricardo Nabinger Sanchez
MFC after:	3 days
2007-04-10 11:17:00 +00:00
Alexander Kabaev
445eba04a8 Clean-ip TLS symbol versions. [_]__tls_get_addr function is part of
the platform ABI and as such does not belong in FBSDprivate.

__libc_tls_* functions do not have to be visible to outside world
at all.
2007-04-09 22:48:08 +00:00
Pawel Jakub Dawidek
1f13edbe4b Document KERN_HOSTUUID.
Reminded by:	ru
2007-04-09 20:21:49 +00:00
Ed Maste
52530e556c Document PT_GETNUMLWPS. 2007-04-09 14:56:31 +00:00
Ed Maste
59513fc4ee Describe PT_GETLWPLIST's arguments. 2007-04-07 03:16:23 +00:00
Alexander Kabaev
84830e00cf __p_rcode_syms is declared as external in resolv.conf, so it cannot be
redeclared as static in res_debug.c.

Make __p_rcode_syms global and add it to Symbol map. The rest of
__p_??_syms are already global.

Choice of FBSD_1.0 version for these debug symbols seems strange and
should be revisited before symbol  versioning is enabled for libc.so.7.
2007-04-06 19:45:17 +00:00
Pawel Jakub Dawidek
4e9f341722 Bump date. 2007-04-05 21:17:52 +00:00
Pawel Jakub Dawidek
f6521d1c31 Implement SEEK_DATA and SEEK_HOLE extensions to lseek(2) as found in
OpenSolaris. For more information please refer to:

	http://blogs.sun.com/bonwick/entry/seek_hole_and_seek_data
2007-04-05 21:10:53 +00:00
Pawel Jakub Dawidek
f3a8d2f93c Add security.jail.mount_allowed sysctl, which allows to mount and
unmount jail-friendly file systems from within a jail.
Precisely it grants PRIV_VFS_MOUNT, PRIV_VFS_UNMOUNT and
PRIV_VFS_MOUNT_NONUSER privileges for a jailed super-user.
It is turned off by default.

A jail-friendly file system is a file system which driver registers
itself with VFCF_JAIL flag via VFS_SET(9) API.
The lsvfs(1) command can be used to see which file systems are
jail-friendly ones.

There currently no jail-friendly file systems, ZFS will be the first one.
In the future we may consider marking file systems like nullfs as
jail-friendly.

Reviewed by:	rwatson
2007-04-05 21:03:05 +00:00
Xin LI
77fbf8f246 Avoid using intermediate variables by just comparing between
two values, the latter does not tend to have sign extension
and/or overflow bugs, and makes the code more obvious.

While I'm there, make use of a macro which is derived from
bin/ps/ps.c: ps_compat() to improve the readability of the
code.

Suggested by:	bde
MFC after:	1 week
2007-04-05 02:07:33 +00:00
Jung-uk Kim
eef2b291e9 Import amd64 assembly implementations of div(3) family from NetBSD.
Obtained from:	NetBSD
2007-04-04 01:19:54 +00:00
Alexander Kabaev
f82d4eed2f Add entry for dl_iterate_phdr. 2007-04-03 18:38:01 +00:00
Alexander Kabaev
832a21869c Add stub for dl_iterate_phdr. 2007-04-03 18:35:20 +00:00
Jason Evans
d33f4690ba Use size_t instead of unsigned for pagesize-related values, in order to
avoid downcasting issues.  In particular, this change fixes
posix_memalign(3) for alignments greater than 2^31 on LP64 systems.

Make sure that NDEBUG is always set to be compatible with MALLOC_DEBUG. [1]

Reported by:	[1] Lee Hyo geol <hyogeollee@gmail.com>
2007-03-29 21:07:17 +00:00
Jason Evans
eaf8d73212 Remove the run promotion/demotion machinery. Replace it with red-black
trees that track all non-full runs for each bin.  Use the red-black
trees to be able to guarantee that each new allocation is placed in the
lowest address available in any non-full run.  This change completes the
transition to allocating from low addresses in order to reduce the
retention of sparsely used chunks.

If the run in current use by a bin becomes empty, deallocate the run
rather than retaining it for later use.  The previous behavior had the
tendency to spread empty runs across multiple chunks, thus preventing
the release of chunks that were completely unused.

Generalize base_chunk_alloc() (and rename it to base_pages_alloc()) to
handle allocation sizes larger than the chunk size, so that it is
possible to support chunk sizes that are smaller than an arena object.

Reduce the minimum chunk size from 64kB to 8kB.

Optimize tracking of addresses for deleted chunks.

Fix a statistics bug for huge allocations.
2007-03-28 19:55:07 +00:00
Jason Evans
2872a3cdfe Change macro in order to refer to FreeBSD 7.0 instead of 7.0BSD.
Reported by:	Michal Mertl <mime@traveller.cz>
2007-03-28 18:55:44 +00:00
Jason Evans
0a19939042 Update the IMPLEMENTATION NOTES section to reflect recent malloc
enhancements.
2007-03-28 04:34:19 +00:00
Jason Evans
1d06bfeccf Remove some stray roff formatting that caused incorrect rendering. 2007-03-28 04:33:34 +00:00
Jason Evans
cec95ce278 Add a HISTORY section. 2007-03-28 04:32:51 +00:00
Jason Evans
12fbf47cfb Fix some subtle bugs for posix_memalign() having to do with integer
rounding and overflow.  Carefully document what the various overflow
tests actually detect.

The bugs mostly canceled out, such that the worst possible failure
cases resulted in non-fatal over-allocations.
2007-03-24 20:44:06 +00:00
Jason Evans
e3da012f00 Fix posix_memalign() for large objects. Now that runs are extents rather
than binary buddies, the alignment guarantees are weaker, which requires
a more complex aligned allocation algorithm, similar to that used for
alignment greater than the chunk size.

Reported by:	matteo
2007-03-23 22:58:15 +00:00
Jason Evans
bb99793a2b Use extents rather than binary buddies to track free pages within
chunks.  This allows runs to be any multiple of the page size.  The
primary advantage is that large objects are no longer constrained to be
2^n pages, which can dramatically decrease internal fragmentation for
large objects.  This also allows the sizes for runs that back small
objects to be more finely tuned.

Free runs are searched for linearly using the chunk page map (with the
help of some heuristic optimizations).  This changes the allocation
policy from "first best fit" to "first fit".  A prototype red-black tree
implementation for tracking free runs that implemented "first best fit"
did not cause a measurable speed or memory usage difference for
realistic chunk sizes (though of course it is possible to construct
benchmarks that favor one allocation policy over another).

Refine the handling of fullness constraints for small runs to be more
tunable.

Restructure the per chunk page map to contain only two fields per entry,
rather than four.  Also, increase each entry from 4 to 8 bytes, since it
allows for 32-bit integers, without increasing the number of chunk
header pages.

Relax the maximum chunk size constraint.  This is of no practical
interest; it is merely fallout from the chunk page map restructuring.

Revamp statistics gathering and reporting to be faster, clearer and more
informative.  Statistics gathering is fast enough now to have little
to no impact on application speed, but it still requires approximately
two extra pages of memory per arena (per process).  This memory overhead
may be acceptable for most systems, but we still need to leave
statistics gathering disabled by default in RELENG branches.

Rename NO_MALLOC_EXTRAS to MALLOC_PRODUCTION in order to make its intent
clearer (i.e. it should be defined in RELENG branches).
2007-03-23 05:05:48 +00:00
Max Laier
02023242ea Let people in on the magic of INET[6]_ADDRSTRLEN which comes quite handy in
combination with inet_ntop().

Reviewed by:	trhodes "works for me"
2007-03-21 05:46:18 +00:00
Jason Evans
c9f0c8fd74 Avoid using vsnprintf(3) unless MALLOC_STATS is defined, in order to
avoid substantial potential bloat for static binaries that do not
otherwise use any printf(3)-family functions. [1]

Rearrange arena_run_t so that the region bitmask can be minimally sized
according to constraints related to each bin's size class.  Previously,
the region bitmask was the same size for all run headers, which wasted
a measurable amount of memory.

Rather than making runs for small objects as large as possible, make
runs as small as possible such that header overhead stays below a
certain bound.  There are two exceptions that override the header
overhead bound:

	1) If the bound is impossible to honor, it is relaxed on a
	   per-size-class basis.  Since there is one bit of header
	   overhead per object (plus a constant), it is impossible to
	   achieve a header overhead less than or equal to 1/(# of bits
	   per object).  For the current setting of maximum 0.5% header
	   overhead, this relaxation comes into play for {2, 4, 8,
	   16}-byte objects, for which header overhead is (on 64-bit
	   systems) {7.1, 4.3, 2.2, 1.2}%, respectively.

	2) There is still a cap on small run size, still set to 64kB.
	   This comes into play for {1024, 2048}-byte objects, for which
	   header overhead is {1.6, 3.1}%, respectively.

In practice, this reduces the run sizes, which makes worst case
low-water memory usage due to fragmentation less bad.  It also reduces
worst case high-water run fragmentation due to non-full runs, but this
is only a constant improvement (most important to small short-lived
processes).

Reduce the default chunk size from 2MB to 1MB.  Benchmarks indicate that
the external fragmentation reduction makes 1MB the new sweet spot (as
small as possible without adversely affecting performance).

Reported by:	[1] kientzle
2007-03-20 03:44:10 +00:00
Maxim Konovalov
a0490929c3 o Add ENVIRONMENT section and mention there that TMPDIR is ignored
when issetugid(3) is true.

PR:		docs/108346
Obtained from:	OpenBSD
MFC after:	1 week
2007-03-16 21:46:24 +00:00
Randall Stewart
42551e993f - Sysctl's move to seperate file
- moved away from ifn/ifa access to sctp_ifa/sctp_ifn
  built and managed by the add-ip code.
- cleaned up add-ip code to use the iterator
- made iterator be a thread, which enables auto-asconf now.
- rewrote and cleaned up source address selection (also
  made it use new structures).
- Fixed a couple of memory leaks.
- DACK now settable as to how many packets to delay as
  well as time.
- connectx() to latest socket API, new associd arg.
- Fixed issue with revoking and loosing potential to
  send when we inflate the flight size. We now inflate
  the cwnd too and deflate it later when the revoked
  chunk is sent or acked.
- Got rid of some temp debug code
- src addr selection moved to a common file (sctp_output.c)
- Support for simple VRF's (we have support for multi-vfr
  via compile switch that is scrubbed from BSD but we won't
  need multi-vrf until we first get VRF :-D)
- Rest of mib work for address information now done
- Limit number of addresses in INIT/INIT-ACK to
  a #def (30).

Reviewed by:	gnn
2007-03-15 11:27:14 +00:00
Bruce M Simpson
fd46d76ecf Wordsmithery.
Pointed out by:	ru
2007-03-09 19:43:42 +00:00
Bruce M Simpson
7b7b32179e Document SO_ACCEPTCONN.
Submitted by:	Vlad GALU (with changes)
MFC after:	3 days
2007-03-08 12:57:12 +00:00