musl - musl - an implementation of the standard library for Linux-based systems

Age	Commit message (Collapse)	Author	Lines
2011-03-10	make sigaltstack work (missing macros in signal.h, error conditions)	Rich Felker	-1/+11

2011-03-10	fix errno behavior in clock_* functions	Rich Felker	-3/+0
	these functions are specified inconsistent in whether they're specified to return an error value, or return -1 and set errno. hopefully now they all match what POSIX requires.
2011-03-09	fix error handling for pthread_sigmask	Rich Felker	-1/+15
	it must return errno, not -1, and should reject invalud values for how.
2011-03-09	make fork properly initialize the main thread in the child process	Rich Felker	-0/+7

2011-03-09	optimize pthread initialization	Rich Felker	-2/+2
	the set_tid_address returns the tid (which is also the pid when called from the initial thread) so there is no need to make a separate syscall to get pid/tid.
2011-03-09	fix race condition in raise - just mask signals	Rich Felker	-9/+9
	a signal handler could fork after the pid/tid were read, causing the wrong process to be signalled. i'm not sure if this is supposed to have UB or not, but raise is async-signal-safe, so it probably is allowed. the current solution is slightly expensive so this implementation is likely to be changed in the future.
2011-03-09	fix raise semantics with threads.	Rich Felker	-1/+12

2011-03-08	simplify and optimize pthread_mutex_trylock	Rich Felker	-17/+16

2011-03-08	rwlock trylock functions were wrongly returning EAGAIN instead of EBUSY	Rich Felker	-3/+3

2011-03-08	fix major breakage in pthread_once (it was always deadlocking)	Rich Felker	-8/+7
	the issue was a break statement that was breaking only from the switch, not the enclosing for loop, and a failure to set the final success state.
2011-03-08	fix and optimize non-default-type mutex behavior	Rich Felker	-25/+19
	problem 1: mutex type from the attribute was being ignored by pthread_mutex_init, so recursive/errorchecking mutexes were never being used at all. problem 2: ownership of recursive mutexes was not being enforced at unlock time.
2011-03-08	implement pthread_mutexattr_[gs]etpshared functions	Rich Felker	-0/+16

2011-03-08	disallow cpu time clocks as condattr clock values	Rich Felker	-1/+1

2011-03-07	fix off-by-one error in sem_(timed)wait (using old sem value instead of new)	Rich Felker	-1/+1

2011-03-07	use the selected clock from the condattr for pthread_cond_timedwait	Rich Felker	-1/+3

2011-03-07	implement pthread_rwlockattr_* (essentially no-ops)	Rich Felker	-0/+28

2011-03-07	implement pthread_condattr_* interfaces	Rich Felker	-0/+45
	note that, while the attributes are stored, they are not used in pthread_cond_init yet.
2011-03-07	reject invalid attribute settings	Rich Felker	-0/+2
	note that this is a pedantic conformance issue and waste of code. it only affects broken code or code that is probing for conformance.
2011-03-07	implement barrier attribute functions (essentially no-ops)	Rich Felker	-0/+27

2011-03-04	enforce stack size min in pthread_attr_setstacksize	Rich Felker	-1/+1

2011-03-04	implement POSIX semaphores	Rich Felker	-0/+201

2011-03-03	optimize POSIX TSD for fast pthread_getspecific	Rich Felker	-9/+14

2011-03-03	implement POSIX shared memory	Rich Felker	-0/+42

2011-03-01	depends on settimeofday which needs _GNU_SOURCE feature test	Rich Felker	-0/+1

2011-02-27	implement futimens and utimensat	Rich Felker	-0/+13

2011-02-27	implement fexecve	Rich Felker	-0/+10

2011-02-27	cleanup utf-8 multibyte code, use visibility if possible	Rich Felker	-84/+5
	this code was written independently of musl, with support for a the backwards, nonstandard "31-bit unicode" some libraries/apps might want. unfortunately the extra code (inside #ifdef) makes the source harder to read and makes code that should be simple look complex, so i'm removing it. anyone who wants to use the old code can find it in the history or from elsewhere. also, change the visibility of the __fsmu8 state machine table to hidden, if supported. this should improve performance slightly in shared-library builds.
2011-02-26	fix missing prototype for strsignal	Rich Felker	-0/+1

2011-02-24	various changes in preparation for dynamic linking support	Rich Felker	-5/+21
	prefer using visibility=hidden for __libc internal data, rather than an accessor function, if the compiler has visibility. optimize with -O3 for PIC targets (shared library). without heavy inlining, reloading the GOT register in small functions kills performance. 20-30% size increase for a single libc.so is not a big deal, compared to comparaible size increase in every static binaries. use -Bsymbolic-functions, not -Bsymbolic. global variables are subject to COPY relocations, and thus binding their addresses in the library at link time will cause library functions to read the wrong (original) copies instead of the copies made in the main program's bss section. add entry point, _start, for dynamic linker.
2011-02-24	add implementation of memccpy function	Rich Felker	-0/+32

2011-02-24	fix backwards conditional in stpncpy	Rich Felker	-1/+1
	this only made the function unnecessarily slow on systems with unaligned access, but would of course crash on systems that can't do unaligned accesses (none of which have ports yet).
2011-02-22	rewind must clear the error indicator in addition to seeking	Rich Felker	-2/+5

2011-02-21	change errno to static linkage (improves PIC code generation)	Rich Felker	-4/+2

2011-02-21	remove sample utf-8 code that's not part of the standard library	Rich Felker	-47/+0

2011-02-20	use an accessor function for __libc data pointer when compiled as PIC	Rich Felker	-4/+19
	prior to this change, a large portion of libc was unusable prior to relocation by the dynamic linker, due to dependence on the global data in the __libc structure and the need to obtain its address through the GOT. with this patch, the accessor function __libc_loc is now able to obtain the address of __libc via PC-relative addressing without using the GOT. this means the majority of libc functionality is now accessible right away. naturally, the above statements all depend on having an architecture where PC-relative addressing and jumps/calls are feasible, and a compiler that generates the appropriate code.
2011-02-20	avoid referencing address of extern function from vdprintf	Rich Felker	-1/+6
	this change is in preparation for upcoming PIC/shared library support. the intent is to avoid going through the GOT, mainly so that dprintf is operable immediately, prior to processing of relocations. having dprintf accessible from the dynamic linker will make writing and debugging the dynamic linker much easier.
2011-02-20	cleanup asprintf stuff	Rich Felker	-2/+2

2011-02-20	fix %n specifier, again. this time it was storing the wrong value.	Rich Felker	-7/+7

2011-02-20	make malloc(0) return unique pointers rather than NULL	Rich Felker	-6/+10
	this change is made with some reluctance, but i think it's for the best. correct programs must handle either behavior, so there is little advantage to having malloc(0) return NULL. and i managed to actually make the malloc code slightly smaller with this change.
2011-02-20	fix simple_malloc malloc(0) behavior not to return non-unique pointers	Rich Felker	-0/+1

2011-02-20	fix simple_malloc size restrictions	Rich Felker	-5/+6
	do not allow allocations that overflow ptrdiff_t; fix some overflow checks that were not quite right but didn't matter due to address layout implementation.
2011-02-20	fix null pointer dereference introduced in last sigprocmask commit	Rich Felker	-1/+1

2011-02-20	make real symbols for the legacy (nonstandardized) utmp functions	Rich Felker	-0/+8
	this is needed in the long term for ABI compatibility anyway, and in the immediate, it helps with building broken programs like GNU screen that try to prototype the functions themselves rather than using the header.
2011-02-19	workaround gcc bug 46926 by providing a dumb sincos implementation	Rich Felker	-0/+8
	note that this library itself is built with -ffreestanding so sincos.c should not be miscompiled even if the gcc used to compile musl has this bug.
2011-02-19	use rt_sigprocmask, not legacy sigprocmask, syscall in pthread exit code	Rich Felker	-1/+1

2011-02-19	implement the remaining clock_* interfaces	Rich Felker	-0/+36

2011-02-19	race condition fix: block all signals before decrementing thread count	Rich Felker	-22/+2
	the existence of a (kernelspace) thread must never have observable effects after the thread count is decremented. if signals are not blocked, it could end up handling the signal for rsyscall and contributing towards the count of threads which have changed ids, causing a thread to be missed. this could lead to one thread retaining unwanted privilege level. this change may also address other subtle race conditions in application code that uses signals.
2011-02-19	prevent sigprocmask/pthread_sigmask from blocking implementation signals	Rich Felker	-3/+5
	this code was wrongly disabled because the old version was trying to be too clever and didn't work. replaced it with a simple version for now.
2011-02-19	make pthread_exit run dtors for last thread, wait to decrement thread count	Rich Felker	-3/+3

2011-02-19	make mktemp match the historic behavior, and update functions that use it	Rich Felker	-5/+8
	the historic mktemp is supposed to blank the template string on failure, rather than returning 0. just zero the first character so that mkstemp and mkdtemp can still retry with O(1) space requirement.