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* Do not call __pthread_cxa_finalize with invalid struct dl_phdr_info.Konstantin Belousov2010-08-271-1/+1
| | | | | | | | Reported and tested by: Fabian Keil <freebsd-listen fabiankeil de> MFC after: 17 days Notes: svn path=/head/; revision=211894
* Powerpc is special here. powerpc and powerpc64 use different ABIs, soWarner Losh2010-08-241-2/+2
| | | | | | | | | their implementations aren't in the same files. Introduce LIBC_ARCH and use that in preference to MACHINE_CPUARCH. Tested by amd64 and powerpc64 builds (thanks nathanw@) Notes: svn path=/head/; revision=211774
* MFtbemd:Warner Losh2010-08-231-2/+2
| | | | | | | | Prefer MACHNE_CPUARCH to MACHINE_ARCH in most contexts where you want to test of all the CPUs of a given family conform. Notes: svn path=/head/; revision=211725
* On shared object unload, in __cxa_finalize, call and clear all installedKonstantin Belousov2010-08-231-3/+20
| | | | | | | | | | | | | | | | | | | | | | | | | atexit and __cxa_atexit handlers that are either installed by unloaded dso, or points to the functions provided by the dso. Use _rtld_addr_phdr to locate segment information from the address of private variable belonging to the dso, supplied by crtstuff.c. Provide utility function __elf_phdr_match_addr to do the match of address against dso executable segment. Call back into libthr from __cxa_finalize using weak __pthread_cxa_finalize symbol to remove any atfork handler which function points into unloaded object. The rtld needs private __pthread_cxa_finalize symbol to not require resolution of the weak undefined symbol at initialization time. This cannot work, since rtld is relocated before sym_zero is set up. Idea by: kan Reviewed by: kan (previous version) MFC after: 3 weeks Notes: svn path=/head/; revision=211706
* Style.Konstantin Belousov2010-08-231-2/+2
| | | | | | | MFC after: 3 days Notes: svn path=/head/; revision=211704
* Use aux vector to get values for SSP canary, pagesize, pagesizes array,Konstantin Belousov2010-08-171-7/+16
| | | | | | | | | | | | | | number of host CPUs and osreldate. This eliminates the last sysctl(2) calls from the dynamically linked image startup. No objections from: kan Tested by: marius (sparc64) MFC after: 1 month Notes: svn path=/head/; revision=211416
* Fix typos, spelling, formatting and mdoc mistakes found by Nobuyuki whileJoel Dahl2010-08-161-2/+2
| | | | | | | | | translating these manual pages. Minor corrections by me. Submitted by: Nobuyuki Koganemaru <n-kogane@syd.odn.ne.jp> Notes: svn path=/head/; revision=211397
* Fix typos and spelling mistakes.Joel Dahl2010-08-061-1/+1
| | | | Notes: svn path=/head/; revision=210933
* Comment out IEEE Std 1003.1-2001 conformance proclaimed too early,Andrey A. Chernov2010-08-051-5/+5
| | | | | | | | see problems described in the comment to: http://www.freebsd.org/cgi/query-pr.cgi?pr=kern/128933 Notes: svn path=/head/; revision=210853
* mdoc: remove unbalanced quotesUlrich Spörlein2010-08-021-2/+2
| | | | Notes: svn path=/head/; revision=210765
* Provide 64-bit PowerPC support in libc.Nathan Whitehorn2010-07-101-1/+6
| | | | | | | Obtained from: projects/ppc64 Notes: svn path=/head/; revision=209878
* In threaded processes, destroy the mutex atexit_mutex when we'veColin Percival2010-06-131-0/+3
| | | | | | | | | | | | | finished using it. This allows the mutex's allocated memory to be freed. This is one sense a rather silly change, since at this point we're less than a microsecond away from calling _exit; but fixing this memory leak is likely to make life easier for anyone trying to track down other memory leaks. Notes: svn path=/head/; revision=209117
* mdoc: move CAVEATS, BUGS and SECURITY CONSIDERATIONS sections to theUlrich Spörlein2010-05-131-12/+12
| | | | | | | | | | | | | | bottom of the manpages and order them consistently. GNU groff doesn't care about the ordering, and doesn't even mention CAVEATS and SECURITY CONSIDERATIONS as common sections and where to put them. Found by: mdocml lint run Reviewed by: ru Notes: svn path=/head/; revision=208027
* The previous revision actually removed the bug being hinted at, soChristian Brueffer2010-05-121-3/+2
| | | | | | | | | | | go ahead and remove the hint. PR: 143944 Submitted by: Jeremy Huddleston <jeremyhu@apple.com> MFC after: 1 week Notes: svn path=/head/; revision=207946
* C language does not has references, it provides pointers.Konstantin Belousov2010-04-211-2/+2
| | | | | | | | Suggested by: bde MFC after: 2 weeks Notes: svn path=/head/; revision=207009
* Add standards section, improve wording, taking into account the handlingKonstantin Belousov2010-04-211-6/+8
| | | | | | | | | | of NULL and changed type in declaration. Suggested by: bde MFC after: 2 weeks Notes: svn path=/head/; revision=206998
* Free() is not allowed to modify errno, remove safety brackets around it [1].Konstantin Belousov2010-04-201-13/+5
| | | | | | | | | | | | Add small optimization, do not copy a string to the buffer that is to be freed immediately after. Noted by: jh [1] Reviewed by: jh MFC after: 2 weeks Notes: svn path=/head/; revision=206898
* Slightly modernize realpath(3).Konstantin Belousov2010-04-202-8/+65
| | | | | | | | | | | | | | SUSv4 requires that implementation returns EINVAL if supplied path is NULL, and ENOENT if path is empty string [1]. Bring prototype in conformance with SUSv4, adding restrict keywords. Allow the resolved path buffer pointer be NULL, in which case realpath(3) allocates storage with malloc(). PR: kern/121897 [1] MFC after: 2 weeks Notes: svn path=/head/; revision=206893
* mdoc: order prologue macros consistently by Dd/Dt/OsUlrich Spörlein2010-04-142-2/+2
| | | | | | | | | | | Although groff_mdoc(7) gives another impression, this is the ordering most widely used and also required by mdocml/mandoc. Reviewed by: ru Approved by: philip, ed (mentors) Notes: svn path=/head/; revision=206622
* In reallocf(3), free the memory only when size != 0. Otherwise, when theJaakko Heinonen2010-03-031-1/+8
| | | | | | | | | | | System V compatibility option (malloc "V" flag) is in effect a zero sized reallocf() could cause a double free. PR: bin/141753 Submitted by: Dan Lukes Notes: svn path=/head/; revision=204636
* Rewrite red-black trees to do lazy balance fixup. This improvesJason Evans2010-02-282-772/+837
| | | | | | | insert/remove speed by ~30%. Notes: svn path=/head/; revision=204493
* Define TLS_MODEL for PowerPC as well. Since PowerPC uses variant I,Marcel Moolenaar2010-02-161-0/+1
| | | | | | | like ia64, leave it empty (default model). Notes: svn path=/head/; revision=203969
* Unbreak ia64: tls_model("initial-exec") is invalid, because it assumesMarcel Moolenaar2010-02-161-11/+9
| | | | | | | | | the static TLS model, which is fundamentally different from the dynamic TLS model. The consequence was data corruption. Limit the attribute to i386 and amd64. Notes: svn path=/head/; revision=203950
* Fix PRMartin Cracauer2010-02-101-2/+2
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | http://www.freebsd.org/cgi/query-pr.cgi?pr=bin/143350 Empty string test gone wrong. Testing this requires that you have a locale that has the sign string unset but has int_n_sign_posn set (the default locale falls through to use "()" around negative numbers which is probably another bug). I created that setup by hand and indeed without this fix negative numbers are put out as positive numbers (doesn't fall through to use "-" as default indicator). Unfixed example in nl_NL.ISO8859-1 with lc->negative_sign set to empty string: strfmon(buf, sizeof(buf), "%-8i", -42.0); ==> example2: 'EUR 42,00' 'Eu 42,00' Fixed: example2: 'EUR 42,00-' 'Eu 42,00-' This file and suggested fix are identical in at least freebsd-8. Backport might be appropriate but some expert on locales should probably have a look at us defaulting to negative numbers in parenthesis when LC_* is default. That doesn't look right and is not what other OSes are doing. PR: 143350 Submitted by: Corinna Vinschen Reviewed by: bug reporter submitted, tested by me Notes: svn path=/head/; revision=203734
* Fix bugs:Jason Evans2010-01-314-1352/+2256
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | * Fix a race in chunk_dealloc_dss(). * Check for allocation failure before zeroing memory in base_calloc(). Merge enhancements from a divergent version of jemalloc: * Convert thread-specific caching from magazines to an algorithm that is more tunable, and implement incremental GC. * Add support for medium size classes, [4KiB..32KiB], 2KiB apart by default. * Add dirty page tracking for pages within active small/medium object runs. This allows malloc to track precisely which pages are in active use, which makes dirty page purging more effective. * Base maximum dirty page count on proportion of active memory. * Use optional zeroing in arena_chunk_alloc() to avoid needless zeroing of chunks. This is useful in the context of DSS allocation, since a long-lived application may commonly recycle chunks. * Increase the default chunk size from 1MiB to 4MiB. Remove feature: * Remove the dynamic rebalancing code, since thread caching reduces its utility. Notes: svn path=/head/; revision=203329
* Add missing return, in a rare case where we can't allocate memory inEd Maste2010-01-271-0/+1
| | | | | | | | | | deallocate. Submitted by: Ryan Stone (rysto32 at gmail dot com) Approved by: jasone Notes: svn path=/head/; revision=203077
* Simplify arena_run_reg_dalloc(), and remove a bug that was due to incorrectJason Evans2009-12-101-89/+28
| | | | | | | initialization of ssize_invs. Notes: svn path=/head/; revision=200345
* Fix the posix_memalign() changes in r196861 to actually return a NULL pointerJason Evans2009-12-101-0/+1
| | | | | | | | | as intended. PR: standards/138307 Notes: svn path=/head/; revision=200340
* Revert behavior change to setenv(), unsetenv() and putenv() until a moreSean Farley2009-12-071-3/+6
| | | | | | | thorough security review has been completed. Notes: svn path=/head/; revision=200198
* Update the getenv(3) man page to reflect the recent change to the behaviorSean Farley2009-12-061-9/+9
| | | | | | | | | | of setenv(), putenv() and unsetenv() when dealing with corrupt entries in environ. They now output a warning and complete their task without error. MFC after: 1 week Notes: svn path=/head/; revision=200195
* Change the behavior of setenv(), putenv() and unsetenv() to continue parsingSean Farley2009-12-061-6/+3
| | | | | | | | | | | | | | | instead of returning an error if a corrupt (not a "name=value" string) entry in the environ array is detected when (re)-building the internal environment. This should prevent applications or libraries from experiencing issues arising from the expectation that these calls will complete even with corrupt entries. The behavior is now as it was prior to 7.0. Reviewed by: jilles MFC after: 1 week Notes: svn path=/head/; revision=200191
* Improve the comment within getenv() explaining the search order it takes toSean Farley2009-12-061-8/+9
| | | | | | | | | | | | | find a variable. Include a note that it must not cause the internal environment to be generated since malloc() depends upon getenv(). To call malloc() would create a circular dependency. Recommended by: green Approved by: jilles MFC after: 1 week Notes: svn path=/head/; revision=200190
* Fix many "function declaration isn't a prototype" warnings in libc.Ed Schouten2009-12-051-2/+1
| | | | | | | | I've only fixed code that seems to be written by `us'. There are still many warnings like this present in resolv/, rpc/, stdtime/ and yp/. Notes: svn path=/head/; revision=200150
* Temporarily revert the previous change because the linker has beenBrian Feldman2009-12-011-36/+28
| | | | | | | modified so that it will abort when the environment is bad. Notes: svn path=/head/; revision=199987
* Do not gratuitously fail *env(3) operations due to corrupt ('='-less)Brian Feldman2009-12-011-28/+36
| | | | | | | | | | | | | | | | **environ entries. This puts non-getenv(3) operations in line with getenv(3) in that bad environ entries do not cause all operations to fail. There is still some inconsistency in that getenv(3) in the absence of any environment-modifying operation does not emit corrupt environ entry warnings. I also fixed another inconsistency in getenv(3) where updating the global environ pointer would not be reflected in the return values. It would have taken an intermediary setenv(3)/putenv(3)/unsetenv(3) in order to see the change. Notes: svn path=/head/; revision=199983
* Change the utrace log entry for malloc_init from (0, 0, 0) to (-1, 0, 0)Colin Percival2009-11-141-1/+1
| | | | | | | | | in order to distinguish it from free(NULL), which is logged as (0, 0, 0). Reviewed by: jhb Notes: svn path=/head/; revision=199264
* Make malloc(3) superpage aware. Specifically, if getpagesizes(3) returnsAlan Cox2009-09-262-2/+19
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | a large page size that is greater than malloc(3)'s default chunk size but less than or equal to 4 MB, then increase the chunk size to match the large page size. Most often, using a chunk size that is less than the large page size is not a problem. However, consider a long-running application that allocates and frees significant amounts of memory. In particular, it frees enough memory at times that some of that memory is munmap()ed. Up until the first munmap(), a 1MB chunk size is just fine; it's not a problem for the virtual memory system. Two adjacent 1MB chunks that are aligned on a 2MB boundary will be promoted automatically to a superpage even though they were allocated at different times. The trouble begins with the munmap(), releasing a 1MB chunk will trigger the demotion of the containing superpage, leaving behind a half-used 2MB reservation. Now comes the real problem. Unfortunately, when the application needs to allocate more memory, and it recycles the previously munmap()ed address range, the implementation of mmap() won't be able to reuse the reservation. Basically, the coalescing rules in the virtual memory system don't allow this new range to combine with its neighbor. The effect being that superpage promotion will not reoccur for this range of addresses until both 1MB chunks are freed at some point in the future. Reviewed by: jasone MFC after: 3 weeks Notes: svn path=/head/; revision=197524
* Handle zero size for posix_memalign. Return NULL or unique addressKonstantin Belousov2009-09-051-0/+9
| | | | | | | | | | according to the 'V' option. PR: standards/138307 MFC after: 1 week Notes: svn path=/head/; revision=196861
* Our implementation of granpt(3) could be valid in the future.Ed Schouten2009-08-241-15/+11
| | | | | | | | | | | | | | | | | | | | | | | | When I wrote the pseudo-terminal driver for the MPSAFE TTY code, Robert Watson and I agreed the best way to implement this, would be to let posix_openpt() create a pseudo-terminal with proper permissions in place and let grantpt() and unlockpt() be no-ops. This isn't valid behaviour when looking at the spec. Because I thought it was an elegant solution, I filed a bug report at the Austin Group about this. In their last teleconference, they agreed on this subject. This means that future revisions of POSIX may allow grantpt() and unlockpt() to be no-ops if an open() on /dev/ptmx (if the implementation has such a device) and posix_openpt() already do the right thing. I'd rather put this in the manpage, because simply mentioning we don't comply to any standard makes it look worse than it is. Right now we don't, but at least we took care of it. Approved by: re (kib) MFC after: 3 days Notes: svn path=/head/; revision=196508
* Simplify. We can just use .sinclude here.Ed Schouten2009-06-231-3/+1
| | | | | | | Submitted by: Christoph Mallon Notes: svn path=/head/; revision=194703
* Our grantpt(3) and unlockpt(3) don't comply with POSIX.Ed Schouten2009-05-041-3/+7
| | | | Notes: svn path=/head/; revision=191789
* "-isoC-99" should be spelled without 'c'.Xin LI2009-03-011-1/+1
| | | | Notes: svn path=/head/; revision=189207
* Add two new routines: fdevname() and fdevname_r().Ed Schouten2009-02-111-5/+3
| | | | | | | | | | | | | | | | | A more elegant way of obtaining a name of a character device by its file descriptor on FreeBSD, is to use the FIODGNAME ioctl. Because a valid file descriptor implies a file descriptor is visible in /dev, it will always resolve a valid device name. I'm adding a more friendly wrapper for this ioctl, called fdevname(). It is a lot easier to use than devname() and also has better error handling. When a device name cannot be resolved, it will just return NULL instead of a generated device name that makes no sense. Discussed with: kib Notes: svn path=/head/; revision=188497
* Fix language on atol(3) manpage. Add a COMPATIBILITY sectionGiorgos Keramidas2009-02-081-3/+32
| | | | | | | | | | | | | stating that in FreeBSD the atol() and atoll() functions affect errno in the same way as strtol() and stroll(). PR: docs/126487 Submitted by: edwin Reviewed by: trhodes, gabor MFC after: 1 week Notes: svn path=/head/; revision=188305
* Fix a lock order reversal bug that could cause deadlock during fork(2).Jason Evans2008-12-011-11/+37
| | | | | | | Reported by: kib Notes: svn path=/head/; revision=185514
* Adjust an assertion to handle the case where a lock is contested, butJason Evans2008-11-301-1/+1
| | | | | | | | | spinning is avoided due to running on a single-CPU system. Reported by: stefanf Notes: svn path=/head/; revision=185483
* Do not spin when trying to lock on a single-CPU system.Jason Evans2008-11-301-11/+13
| | | | | | | Reported by: davidxu Notes: svn path=/head/; revision=185468
* Revert to preferring mmap(2) over sbrk(2) when mapping memory, due toJason Evans2008-11-032-13/+18
| | | | | | | | | | potential extreme contention in the kernel for multi-threaded applications on SMP systems. Reported by: kris Notes: svn path=/head/; revision=184602
* MTC r183949:Alexander Leidinger2008-10-171-0/+5
| | | | | | | | | | Allow to define MALLOC_PRODUCTION with a make variable instead of polluting the global CFLAGS. Reviewed by: jasone Notes: svn path=/head/; revision=183969
* Use PAGE_{SIZE,MASK,SHIFT} from machine/param.h rather than hard-codingJason Evans2008-09-101-120/+88
| | | | | | | | | page size and using sysconf(3). Suggested by: marcel Notes: svn path=/head/; revision=182906
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