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* experimental dynamic linker!Rich Felker2011-06-183-0/+412
| | | | | | | | some notes: - library search path is hard coded - x86_64 code is untested and may not work - dlopen/dlsym is not yet implemented - relocations in read-only memory won't work
* fix memory leak on failure in realpathRich Felker2011-06-181-4/+4
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* duplicate re_nsub in LSB/glibc ABI compatible locationRich Felker2011-06-161-1/+1
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* restore use of .type in asm, but use modern @function (vs %function)Rich Felker2011-06-1420-0/+29
| | | | | | | | this seems to be necessary to make the linker accept the functions in a shared library (perhaps to generate PLT entries?) strictly speaking libc-internal asm should not need it. i might clean that up later.
* fix race condition in pthread_killRich Felker2011-06-143-1/+8
| | | | | | | | | | | | | | if thread id was reused by the kernel between the time pthread_kill read it from the userspace pthread_t object and the time of the tgkill syscall, a signal could be sent to the wrong thread. the tgkill syscall was supposed to prevent this race (versus the old tkill syscall) but it can't; it can only help in the case where the tid is reused in a different process, but not when the tid is reused in the same process. the only solution i can see is an extra lock to prevent threads from exiting while another thread is trying to pthread_kill them. it should be very very cheap in the non-contended case.
* run dtors before taking the exit-lock in pthread exitRich Felker2011-06-141-2/+2
| | | | previously a long-running dtor could cause pthread_detach to block.
* minor locking optimizationsRich Felker2011-06-142-2/+2
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* avoid 64bit warnings when using pointers as entropy for temp namesRich Felker2011-06-132-2/+4
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* fix sigset macro for 64-bit systems (<< was overflowing due to wrong type)Rich Felker2011-06-131-1/+1
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* remove all .size and .type directives for functions from the asmRich Felker2011-06-1318-52/+0
| | | | | these are useless and have caused problems for users trying to build with non-gnu tools like tcc's assembler.
* remove old useless timezone.s file (unused)Rich Felker2011-06-131-27/+0
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* fix wrong type for wcsrchr argument 2Rich Felker2011-06-131-1/+1
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* x86_64 fenv support (untested; at least known to build successfully)Rich Felker2011-06-131-0/+88
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* fix fesetround - it was writing to status word instead of control wordRich Felker2011-06-131-3/+8
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* floating point environment, untestedRich Felker2011-06-126-0/+144
| | | | | | | | | | at present the i386 code does not support sse floating point, which is not part of the standard i386 abi. while it may be desirable to support it later, doing so will reduce performance and require some tricks to probe if sse support is present. this first commit is i386-only, but it should be trivial to port the asm to x86_64.
* malloc: cast size down to int in bin_index functionsRich Felker2011-06-121-2/+2
| | | | | | | | | | | even if size_t was 32-bit already, the fact that the value was unsigned and that gcc is too stupid to figure out it would be positive as a signed quantity (due to the immediately-prior arithmetic and conditionals) results in gcc compiling the integer-to-float conversion as zero extension to 64 bits followed by an "fildll" (64 bit) instruction rather than a simple "fildl" (32 bit) instruction on x86. reportedly fildll is very slow on certain p4-class machines; even if not, the new code is slightly smaller.
* another return value fix for mktemp...Rich Felker2011-06-121-1/+2
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* it's called getgrgid_r, not getgruid_r...Rich Felker2011-06-081-1/+1
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* implement psignal and psiginfoRich Felker2011-06-082-0/+20
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* mq names without leading / have impl-def behavior; allowing them is easierRich Felker2011-06-072-9/+2
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* define MQ_PRIO_MAXRich Felker2011-06-071-1/+1
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* mq send/recv functions are cancellation pointsRich Felker2011-06-072-2/+2
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* implement mq_notifyRich Felker2011-06-071-2/+65
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* add support for POSIX message queues, except mq_notifyRich Felker2011-06-0710-0/+99
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* use volatile pointers for intentional-crash code.Rich Felker2011-06-062-3/+3
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* fix handling of d_name in struct direntRich Felker2011-06-062-7/+5
| | | | | | | | | | | | basically there are 3 choices for how to implement this variable-size string member: 1. C99 flexible array member: breaks using dirent.h with pre-C99 compiler. 2. old way: length-1 string: generates array bounds warnings in caller. 3. new way: length-NAME_MAX string. no problems, simplifies all code. of course the usable part in the pointer returned by readdir might be shorter than NAME_MAX+1 bytes, but that is allowed by the standard and doesn't hurt anything.
* safety fix for glob's vla usage: disallow patterns longer than PATH_MAXRich Felker2011-06-051-0/+2
| | | | | | | | | | | this actually inadvertently disallows some valid patterns with redundant / or * characters, but it's better than allowing unbounded vla allocation. eventually i'll write code to move the pattern to the stack and eliminate redundancy to ensure that it fits in PATH_MAX at the beginning of glob. this would also allow it to be modified in place for passing to fnmatch rather than copied at each level of recursion.
* eliminate (harmless in this case) vla usage in fnmatch.cRich Felker2011-06-051-1/+1
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* implement pthread_[sg]etconcurrency.Rich Felker2011-05-302-0/+15
| | | | | | there is a resource limit of 0 bits to store the concurrency level requested. thus any positive level exceeds a resource limit, resulting in EAGAIN. :-)
* implement uselocale function (minimal)Rich Felker2011-05-302-0/+12
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* add useless, obsolescent function ulimitRich Felker2011-05-291-0/+19
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* fix backwards posix_spawn file action orderRich Felker2011-05-295-6/+10
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* add accidentally-omitted file needed for posix_spawn file actionsRich Felker2011-05-281-0/+10
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* add file actions support to posix_spawnRich Felker2011-05-285-2/+85
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* posix_spawn: honor POSIX_SPAWN_SETSIGDEF flagRich Felker2011-05-281-1/+3
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* initial implementation of posix_spawnRich Felker2011-05-2812-0/+151
| | | | | file actions are not yet implemented, but everything else should be mostly complete and roughly correct.
* modernize coding style in sjlj asmRich Felker2011-05-264-35/+35
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* fix strncat and wcsncat (double null termination)Rich Felker2011-05-223-3/+3
| | | | also modify wcsncpy to use the same loop logic
* fix wcsncpy writing past end of bufferRich Felker2011-05-221-1/+1
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* fix brk/sbrk behavior to match the real legacy functionsRich Felker2011-05-222-2/+4
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* fix the last known rounding bug in floating point printingRich Felker2011-05-111-3/+4
| | | | | | | | | the observed symptom was that the code was incorrectly rounding up 1.0625 to 1.063 despite the rounding mode being round-to-nearest with ties broken by rounding to even last place. however, the code was just not right in many respects, and i'm surprised it worked as well as it did. this time i tested the values that end up in the variables round, small, and the expression round+small, and all look good.
* eventfd syscall wrapper and read/write wrappersRich Felker2011-05-083-0/+21
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* optimize out useless default-attribute object in pthread_createRich Felker2011-05-071-7/+7
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* optimize compound-literal sigset_t's not to contain useless hurd bitsRich Felker2011-05-073-5/+7
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* overhaul implementation-internal signal protectionsRich Felker2011-05-0712-49/+31
| | | | | | | | | | | | | | | | | | | the new approach relies on the fact that the only ways to create sigset_t objects without invoking UB are to use the sig*set() functions, or from the masks returned by sigprocmask, sigaction, etc. or in the ucontext_t argument to a signal handler. thus, as long as sigfillset and sigaddset avoid adding the "protected" signals, there is no way the application will ever obtain a sigset_t including these bits, and thus no need to add the overhead of checking/clearing them when sigprocmask or sigaction is called. note that the old code actually *failed* to remove the bits from sa_mask when sigaction was called. the new implementations are also significantly smaller, simpler, and faster due to ignoring the useless "GNU HURD signals" 65-1024, which are not used and, if there's any sanity in the world, never will be used.
* reduce some ridiculously large spin countsRich Felker2011-05-062-2/+2
| | | | | | these should be tweaked according to testing. offhand i know 1000 is too low and 5000 is likely to be sufficiently high. consider trying to add futexes to file locking, too...
* remove debug code that was missed in barrier commitRich Felker2011-05-061-1/+0
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* completely new barrier implementation, addressing major correctness issuesRich Felker2011-05-062-20/+48
| | | | | | | | | | | | | | | | | | | | the previous implementation had at least 2 problems: 1. the case where additional threads reached the barrier before the first wave was finished leaving the barrier was untested and seemed not to be working. 2. threads leaving the barrier continued to access memory within the barrier object after other threads had successfully returned from pthread_barrier_wait. this could lead to memory corruption or crashes if the barrier object had automatic storage in one of the waiting threads and went out of scope before all threads finished returning, or if one thread unmapped the memory in which the barrier object lived. the new implementation avoids both problems by making the barrier state essentially local to the first thread which enters the barrier wait, and forces that thread to be the last to return.
* fix fclose return status logic, againRich Felker2011-05-021-1/+2
| | | | | | | | the previous fix was incorrect, as it would prevent f->close(f) from being called if fflush(f) failed. i believe this was the original motivation for using | rather than ||. so now let's just use a second statement to constrain the order of function calls, and to back to using |.
* fix undefined call order in fclose, possible lost output depending on compilerRich Felker2011-05-011-1/+1
| | | | | pcc turned up this bug by calling f->close(f) before fflush(f), resulting in lost output and error on flush.