summaryrefslogtreecommitdiff
AgeCommit message (Collapse)AuthorFilesLines
2012-06-02increase default thread stack size to 80kRich Felker1-1/+1
I've been looking for data that would suggest a good default, and since little has shown up, i'm doing this based on the limited data I have. the value 80k is chosen to accommodate 64k of application data (which happens to be the size of the buffer in git that made it crash without a patch to call pthread_attr_setstacksize) plus the max stack usage of most libc functions (with a few exceptions like crypt, which will be fixed soon to avoid excessive stack usage, and [n]ftw, which inherently uses a fair bit in recursive directory searching). if further evidence emerges suggesting that the default should be larger, I'll consider changing it again, but I'd like to avoid it getting too large to avoid the issues of large commit charge and rapid address space exhaustion on 32-bit machines.
2012-06-02remove implementation-reserved bits when saving signal maskRich Felker1-1/+11
this fix is necessary because a program could be started with some of the implementation-reserved signals masked (e.g. due to exec having been called from a signal handler, or from a non-musl program) and then could obtain an invalid-to-use-later sigset_t as the old/saved signal mask.
2012-06-02remove no-longer-needed unblocking of signals in pthread_createRich Felker1-1/+0
this action is now performed in pthread_self initialization; it must be performed there in case the first call to pthread_create is from a signal handler, in which case the old signal mask could be restored on return from the signal.
2012-06-02add LSB abi junk for ctype functionsRich Felker3-0/+104
this should be the last major fix needed to support running glibc-linked conforming POSIX programs with musl in place of glibc, as long as musl provides the features they need and they don't use pthread cancellation (which is implemented as c++ exceptions in glibc, and fundamentally incompatible with musl).
2012-06-02declare environ in unistd.h when _GNU_SOURCE feature test macro is usedRich Felker1-0/+1
lots of broken programs expect this, and it's gotten to the point of being a troubleshooting FAQ topic. best to just fix it.
2012-06-02use fistpll mnemonic instead of fistpq (more widely supported) on x86_64 tooRich Felker1-1/+1
this was fixed previously on i386 but the corresponding code on x86_64 was missed.
2012-05-31add LSB ABI __xstat, etc. junkRich Felker4-0/+36
2012-05-31enable LARGEFILE64 aliasesRich Felker2-4/+1
these will NOT be used when compiling with -D_LARGEFILE64_SOURCE on musl; instead, they exist in the hopes of eventually being able to run some glibc-linked apps with musl sitting in place of glibc. also remove the (apparently incorrect) fcntl alias.
2012-05-30fix musl-gcc wrapper to work with -pieRich Felker1-1/+1
linking the wrong crt1.o resulted in textrels and thus crashing
2012-05-28there is no such GNU function fpurge, only __fpurge.Rich Felker1-1/+0
no idea where I got the idea fpurge should exist...
2012-05-28add prototype for BSD/GNU stdio *_unlocked extension functionsRich Felker1-2/+12
also fix up distinction of what is GNU-only and what's GNU+BSD
2012-05-28remove duplicate lfs64 cruft in stdio.hRich Felker1-2/+0
2012-05-28math: fix nextafter definition in tgmath.hnsz1-1/+1
2012-05-27add ldd and main program loading support to dynamic linkerRich Felker4-21/+89
2012-05-27cleanup dynamic linker start code cruftRich Felker3-13/+6
two actual issues: one is that __dynlink no longer wants/needs a GOT pointer argument, so the code to generate that argument can be removed. the other issue was that in the i386 code, argc/argv were being loaded into registers that would be call-clobbered, then copied to preserved registers, rather than just being loaded into the proper call-preserved registers to begin with. this cleanup is in preparation for adding new dynamic linker functionality (ability to explicitly invoke the dynamic linker to run a program).
2012-05-26fix overrun (n essentially ignored) in wcsncmpRich Felker1-1/+1
bug report and solution by Richard Pennington
2012-05-26fix failure of mbsinit(0) (not UB; required to return nonzero)Rich Felker1-1/+1
issue reported by Richard Pennington; slightly simpler fix applied
2012-05-26fix failure of strrchr(str, 0)Rich Felker1-1/+1
bug report and solution by Richard Pennington
2012-05-25avoid using pthread cleanup push/pop in stdio when not neededRich Felker2-6/+14
unfortunately in dynamic-linked programs, these macros cause pthread_self to be initialized, which costs a couple syscalls, and (much worse) would necessarily fail, crash, and burn on ancient (2.4 and earlier) kernels where setting up a thread pointer does not work. i'd like to do this in a more generic way that avoids all use of cleanup push/pop before pthread_self has been successfully called and avoids ugly if/else constructs like the one in this commit, but for now, this will suffice.
2012-05-25ensure pthread-internal signals are unblocked before threads are usedRich Felker1-0/+1
if the process started with these signals blocked, cancellation could fail or setxid could deadlock. there is no way to globally unblock them after threads have been created. by unblocking them in the pthread_self initialization for the main thread, we ensure that they're unblocked before any other threads are created and also outside of any signal handler context (sigaction initialized pthread_self), which is important so that return from a signal handler won't re-block them.
2012-05-25fix regex on armRich Felker1-1/+1
TRE has a broken assumption that wchar_t is signed, which is a sane expectation, but not required by the standard, and false on ARM's ABI. i leave tre_char_t as wchar_t for now, since a pointer to it is directly passed to functions that need pointer to wchar_t. it does not seem to break anything. and since the maximum unicode scalar value is 0x10ffff, just use that explicitly rather than using the max value of any particular C type.
2012-05-25remove cruft from pthread structure (old cancellation stuff)Rich Felker1-2/+0
2012-05-25remove leftover cp_sp cruft from cancellation code, fix small bugRich Felker1-3/+1
the bug was that cancellation requests which arrived while a cancellation point was interrupted by a signal handler would not be acted upon when the signal handler returns. this was because cp_sp was never set; it's no longer needed or used. instead, just always re-raise the signal when cancellation was not acted upon. this wastes a tiny amount of time in the rare case where it even matters, but it ensures correctness and simplifies the code.
2012-05-24fix arm syscall.h to reflect which syscalls actually exist (on EABI)Rich Felker1-22/+0
2012-05-24avoid deprecated (by linux) alarm syscall; use setitimer insteadRich Felker1-1/+4
2012-05-24linux deprecated SYS_utime on some archs, so use SYS_utimes insteadRich Felker1-1/+8
the old code could be kept for cases where SYS_utime is available, but it's not really worth the ifdef ugliness. and better to avoid deprecated stuff just in case the kernel devs ever get crazy enough to start removing it from archs where it was part of the ABI and breaking static bins...
2012-05-23fix bad opcode in arm syscall_cp_asmRich Felker1-1/+1
2012-05-23fix issue with longjmp out of signal handlers and cancellationRich Felker4-52/+35
stale state information indicating that a thread was possibly blocked at a cancellation point could get left behind if longjmp was used to exit a signal handler that interrupted a cancellation point. to fix the issue, we throw away the state information entirely and simply compare the saved instruction pointer to a range of code addresses in the __syscall_cp_asm function. all the ugly PIC work (which becomes minimal anyway with this approach) is defered to cancellation time instead of happening at every syscall, which should improve performance too. this commit also fixes cancellation on arm, which was mildly broken (race condition, not checking cancellation flag once inside the cancellation point zone). apparently i forgot to implement that. the new arm code is untested, but appears correct; i'll test and fix it later if there are problems.
2012-05-23simplify cancellation push/pop slightlyRich Felker2-12/+9
no need to pass unnecessary extra arguments on to the core code in pthread_create.c. this just wastes cycles and code bloat.
2012-05-23debloat jmp_buf in _GNU_SOURCE modeRich Felker1-3/+0
i originally made it the same size as the bloated GNU version, which contains space for saved signal mask, but this makes some structures containing jmp_buf become much larger for no benefit. we will never use the signal mask field with plain setjmp; sigsetjmp serves that purpose.
2012-05-22remove everything related to forkallRich Felker4-78/+0
i made a best attempt, but the intended semantics of this function are fundamentally contradictory. there is no consistent way to handle ownership of locks when forking a multi-threaded process. the code could have worked by accident for programs that only used normal mutexes and nothing else (since they don't actually store or care about their owner), but that's about it. broken-by-design interfaces that aren't even in glibc (only solaris) don't belong in musl.
2012-05-22some feature test fixes for unistd.hRich Felker1-16/+16
2012-05-22fix missing _BSD_SOURCE support in bits/*.hRich Felker9-12/+12
this is actually rather ugly, and would get even uglier if we ever want to support further feature test macros. at some point i may factor the bits headers into separate files for C base, POSIX base, and nonstandard extensions (the only distinctions that seem to matter now) and then the logic for which to include can go in the main header rather than being duplicated for each arch. the downside of this is that it would result in more files having to be opened during compilation, so as long as the ugliness does not grow, i'm inclined to leave it alone for now.
2012-05-22_GNU_SOURCE implies all BSD features except ones GNU rejectsRich Felker1-1/+1
2012-05-22various header cleanups, some related to _BSD_SOURCE additionRich Felker3-17/+9
there is no reason to avoid multiple identical macro definitions; this is perfectly legal C, and even with the maximal warning options enabled, gcc does not issue any warning for it.
2012-05-22bsd_signal is a legacy (removed) XSI function, not needed in _BSD_SOURCERich Felker1-4/+1
its only purpose was for use on non-BSD systems that implement sysv semantics for signal() by default.
2012-05-22support _BSD_SOURCE feature test macroRich Felker22-41/+126
patch by Isaac Dunham. matched closely (maybe not exact) to glibc's idea of what _BSD_SOURCE should make visible.
2012-05-21fix typo in utimes function that made it mess up file timesRich Felker1-1/+1
2012-05-21fix out-of-bounds array access in pthread barriers on 64-bitRich Felker1-1/+1
it's ok to overlap with integer slot 3 on 32-bit because only slots 0-2 are used on process-local barriers.
2012-05-20move getpass decl to the right placeRich Felker2-1/+1
2012-05-16fix misplaced semicolon in preprocessor directive (#undef h_errno)Rich Felker1-1/+1
2012-05-14yet another try to get the check for gcc right...Rich Felker1-1/+1
2012-05-14fix error in last configure change (lack of escaping)Rich Felker1-1/+1
2012-05-14useless lastlog path just to make some stuff happyRich Felker1-0/+1
2012-05-14missing limit LOGIN_NAME_MAXRich Felker1-0/+1
2012-05-13correct the check for gcc (previous version failed for cross compilers)Rich Felker1-1/+1
2012-05-13remove some no-op end of string tests from regex parserRich Felker1-4/+0
these are cruft from the original code which used an explicit string length rather than null termination. i blindly converted all the checks to null terminator checks, without noticing that in several cases, the subsequent switch statement would automatically handle the null byte correctly.
2012-05-13another BRE fix: in ^*, * is literalRich Felker1-0/+2
i don't understand why this has to be conditional on being in BRE mode, but enabling this code unconditionally breaks a huge number of ERE test cases.
2012-05-13let sysconf accurately report # of cpus availableRich Felker1-2/+10
i've been trying out openmp and it seems like it won't be much use without this...
2012-05-12use __h_errno_location for h_errnoRich Felker3-1/+14
we do not bother making h_errno thread-local since the only interfaces that use it are inherently non-thread-safe. but still use the potentially-thread-local ABI to access it just to avoid lock-in.
generated by cgit v1.2.3-70-g09d2 (git 2.46.0) at 2024-12-28 16:16:56 +0000