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2011-11-10fix signed overflows at most-negative values in ato(i|l|ll)Rich Felker3-6/+9
patch by Pascal Cuoq (with minor tweaks to comments)
2011-11-10fix all missing instances of __cplusplus checks/extern "C" in headersRich Felker21-1/+166
patch by Arvid Picciani (aep)
2011-10-26report sem value overflows in sem_postRich Felker1-0/+4
this is not required by the standard, but it's nicer than corrupting the state and rather inexpensive.
2011-10-17add some missing GNU FNM_* extensions to the headerRich Felker1-1/+3
note that none of these are implemented, and programs depending on them may break... patch by sh4rm4
2011-10-17fix some details in ugly stuff that doesn't belong in libcRich Felker2-6/+8
patches by sh4rm4, presumably needed to make gdb or some similar junk happy...
2011-10-15don't define wchar_t on c++Rich Felker3-0/+6
it's a keyword in c++ (wtf). i'm not sure this is the cleanest solution; it might be better to avoid ever defining __NEED_wchar_t on c++. but in any case, this works for now.
2011-10-14support vfork on i386Rich Felker1-0/+14
2011-10-14make available a namespace-safe vfork, if supportedRich Felker1-1/+4
this may be useful to posix_spawn..?
2011-10-14add dummy __cxa_finalizeRich Felker1-0/+4
musl's dynamic linker does not support unloading dsos, so there's nothing for this function to do. adding the symbol in case anything depends on its presence..
2011-10-14support __cxa_atexit, and registering atexit functions from atexit handlersRich Felker1-7/+26
mildly tested; may have bugs. the locking should be updated not to use spinlocks but that's outside the scope of this one module.
2011-10-14simplify atexit and fflush-on-exit handlingRich Felker3-9/+12
2011-10-09fix F_GETOWN return value handlingRich Felker1-0/+1
the fcntl syscall can return a negative value when the command is F_GETOWN, and this is not an error code but an actual value. thus we must special-case it and avoid calling __syscall_ret to set errno. this fix is better than the glibc fix (using F_GETOWN_EX) which only works on newer kernels and is more complex.
2011-10-09fix typo in arm clone() asmRich Felker1-1/+1
2011-10-05fix fcntl O_* flags for armRich Felker1-4/+4
no idea why these 4 are permuted and the rest are standard/generic
2011-10-04make [U]INTn_C() macros have the right type...Rich Felker1-4/+4
...and still be valid in #if directives.
2011-10-03recovering ownerdead robust mutex must reset recursive lock countRich Felker1-0/+1
2011-10-03simplify robust mutex unlock code pathRich Felker1-4/+4
right now it's questionable whether this change is an improvement or not, but if we later want to support priority inheritance mutexes, it will be important to have the code paths unified like this to avoid major code duplication.
2011-10-03fix crash if pthread_mutex_unlock is called without ever lockingRich Felker1-1/+1
this is valid for error-checking mutexes; otherwise it invokes UB and would be justified in crashing.
2011-10-03use count=0 instead of 1 for recursive mutex with only one lock referenceRich Felker2-4/+2
this simplifies the code paths slightly, but perhaps what's nicer is that it makes recursive mutexes fully reentrant, i.e. locking and unlocking from a signal handler works even if the interrupted code was in the middle of locking or unlocking.
2011-10-03sysconf for PTHREAD_KEYS_MAXRich Felker1-1/+1
2011-10-02synchronize cond var destruction with exiting waitsRich Felker3-0/+12
2011-10-01fix failure-to-wake in rwlock unlockRich Felker1-1/+1
a reader unlocking the lock need only wake one waiter (necessarily a writer, but a writer unlocking the lock must wake all waiters (necessarily readers). if it only wakes one, the remainder can remain blocked indefinitely, or at least until the first reader unlocks (in which case the whole lock becomes serialized and behaves as a mutex rather than a read lock).
2011-10-01dlsym entry point for armRich Felker1-0/+6
2011-10-01dynamic linker entry point for armRich Felker1-0/+14
mildly tested, seems to work
2011-10-01typo (copy 2) in arm reloc.hRich Felker1-1/+1
2011-10-01typo in arm reloc.hRich Felker1-1/+1
2011-10-01first attempt at arm dynamic linkingRich Felker1-0/+26
2011-09-29fix various bugs in path and error handling in execvp/fexecveRich Felker2-18/+29
2011-09-28don't crash on null strings in printfRich Felker1-1/+1
passing null pointer for %s is UB but lots of broken programs do it anyway
2011-09-28fix excessive/insufficient wakes in __vm_unlockRich Felker1-3/+3
there is no need to send a wake when the lock count does not hit zero, but when it does, all waiters must be woken (since all with the same sign are eligible to obtain the lock).
2011-09-28make getmntent_r discard long lines when it returns error, not seek backRich Felker1-2/+1
seeking back can be performed by the caller, but if the caller doesn't expect it, it will result in an infinite loop of failures.
2011-09-28improve pshared barriersRich Felker2-12/+14
eliminate the sequence number field and instead use the counter as the futex because of the way the lock is held, sequence numbers are completely useless, and this frees up a field in the barrier structure to be used as a waiter count for the count futex, which lets us avoid some syscalls in the best case. as of now, self-synchronized destruction and unmapping should be fully safe. before any thread can return from the barrier, all threads in the barrier have obtained the vm lock, and each holds a shared lock on the barrier. the barrier memory is not inspected after the shared lock count reaches 0, nor after the vm lock is released.
2011-09-28next step making barrier self-sync'd destruction safeRich Felker2-6/+18
i think this works, but it can be simplified. (next step)
2011-09-28barrier destroy must also wait for threads in other processes exiting barrierRich Felker1-0/+2
the vm lock only waits for threads in the same process exiting. actually this fix is not enough, but it's a start...
2011-09-28stupid typo (caused by rather ugly spelling in POSIX..) in aioRich Felker2-2/+2
2011-09-27correctly handle the degenerate barrier in the pshared caseRich Felker1-1/+1
2011-09-27fix crash in pthread_cond_wait mutex-locked checkRich Felker1-1/+1
it was assuming the result of the condition it was supposed to be checking for, i.e. that the thread ptr had already been initialized by pthread_mutex_lock. use the slower call to be safe.
2011-09-27fix crash in pthread_testcancel if pthread_self has not been calledRich Felker1-1/+1
2011-09-27improve/debloat mutex unlock error checking in pthread_cond_waitRich Felker1-3/+3
we're not required to check this except for error-checking mutexes, but it doesn't hurt. the new test is actually simpler/lighter, and it also eliminates the need to later check that pthread_mutex_unlock succeeds.
2011-09-27check mutex owner in pthread_cond_waitRich Felker1-0/+3
when used with error-checking mutexes, pthread_cond_wait is required to fail with EPERM if the mutex is not locked by the caller. previously we relied on pthread_mutex_unlock to generate the error, but this is not valid, since in the case of such invalid usage the internal state of the cond variable has already been potentially corrupted (due to access outside the control of the mutex). thus, we have to check first.
2011-09-27fix pshared barrier wrong return value.Rich Felker1-1/+1
i set the return value but then never used it... oops!
2011-09-27convert the barrier pshared option back to 0/1 values when getting itRich Felker1-1/+1
2011-09-27improve error handling in mntent stuff...Rich Felker1-2/+9
not sure if this is correct/ideal. it needs further attention.
2011-09-27fix missing va_end in prctl syscall wrapperRich Felker1-0/+1
2011-09-27fix clobbering of errno in get(pw|gr)([ug]id|nam) by fcloseRich Felker2-0/+12
2011-09-27process-shared barrier support, based on discussion with bdonlanRich Felker7-16/+102
this implementation is rather heavy-weight, but it's the first solution i've found that's actually correct. all waiters actually wait twice at the barrier so that they can synchronize exit, and they hold a "vm lock" that prevents changes to virtual memory mappings (and blocks pthread_barrier_destroy) until all waiters are finished inspecting the barrier. thus, it is safe for any thread to destroy and/or unmap the barrier's memory as soon as pthread_barrier_wait returns, without further synchronization.
2011-09-27fix incorrect allocation failure check in pthread_createRich Felker1-1/+1
mmap returns MAP_FAILED not 0 because some idiot thought the ability to mmap the null pointer page would be a good idea...
2011-09-26fix ctype macros to cast argument to (unsigned) firstRich Felker2-7/+7
issue reported by nsz, but it's actually not just pedantic. the functions can take input of any arithmetic type, including floating point, and the behavior needs to be as if the conversion implicit in the function call took place.
2011-09-26another cond var fix: requeue count race conditionRich Felker2-15/+13
lock out new waiters during the broadcast. otherwise the wait count added to the mutex might be lower than the actual number of waiters moved, and wakeups may be lost. this issue could also be solved by temporarily setting the mutex waiter count higher than any possible real count, then relying on the kernel to tell us how many waiters were requeued, and updating the counts afterwards. however the logic is more complex, and i don't really trust the kernel. the solution here is also nice in that it replaces some atomic cas loops with simple non-atomic ops under lock.
2011-09-26fix lost signals in cond varsRich Felker3-14/+17
due to moving waiters from the cond var to the mutex in bcast, these waiters upon wakeup would steal slots in the count from newer waiters that had not yet been signaled, preventing the signal function from taking any action. to solve the problem, we simply use two separate waiter counts, and so that the original "total" waiters count is undisturbed by broadcast and still available for signal.