| Commit message (Expand) | Author | Files | Lines |
|---|
| 2011-03-28 | fix broken spinlock due to miscompilation•••actually this trick also seems to have made the uncontended case slower.
| Rich Felker | 1 | -1/+1 |
| 2011-03-28 | prototype for getpass | Rich Felker | 1 | -0/+4 |
| 2011-03-28 | remove useless field in pthread struct (wasted a good bit of space) | Rich Felker | 1 | -1/+0 |
| 2011-03-28 | fix getc - the classic error of trying to store EOF+0-255 in a char type.. | Rich Felker | 1 | -3/+3 |
| 2011-03-28 | major stdio overhaul, using readv/writev, plus other changes•••the biggest change in this commit is that stdio now uses readv to fill
the caller's buffer and the FILE buffer with a single syscall, and
likewise writev to flush the FILE buffer and write out the caller's
buffer in a single syscall.
making this change required fundamental architectural changes to
stdio, so i also made a number of other improvements in the process:
- the implementation no longer assumes that further io will fail
following errors, and no longer blocks io when the error flag is set
(though the latter could easily be changed back if desired)
- unbuffered mode is no longer implemented as a one-byte buffer. as a
consequence, scanf unreading has to use ungetc, to the unget buffer
has been enlarged to hold at least 2 wide characters.
- the FILE structure has been rearranged to maintain the locations of
the fields that might be used in glibc getc/putc type macros, while
shrinking the structure to save some space.
- error cases for fflush, fseek, etc. should be more correct.
- library-internal macros are used for getc_unlocked and putc_unlocked
now, eliminating some ugly code duplication. __uflow and __overflow
are no longer used anywhere but these macros. switch to read or
write mode is also separated so the code can be better shared, e.g.
with ungetc.
- lots of other small things.
| Rich Felker | 37 | -281/+258 |
| 2011-03-25 | match glibc/lsb cancellation abi on i386•••glibc made the ridiculous choice to use pass-by-register calling
convention for these functions, which is impossible to duplicate
directly on non-gcc compilers. instead, we use ugly asm to wrap and
convert the calling convention. presumably this works with every
compiler anyone could potentially want to use.
| Rich Felker | 8 | -0/+57 |
| 2011-03-25 | remove -Wno-pointer-sign example from dist/config.mak | Rich Felker | 1 | -1/+0 |
| 2011-03-25 | fix all implicit conversion between signed/unsigned pointers•••sadly the C language does not specify any such implicit conversion, so
this is not a matter of just fixing warnings (as gcc treats it) but
actual errors. i would like to revisit a number of these changes and
possibly revise the types used to reduce the number of casts required.
| Rich Felker | 19 | -48/+44 |
| 2011-03-24 | simplify and optimize FILE lock handling | Rich Felker | 5 | -14/+14 |
| 2011-03-24 | prepare pthread_spin_unlock for archs that need memory barriers | Rich Felker | 1 | -1/+2 |
| 2011-03-24 | optimize contended case for pthread_spin_trylock | Rich Felker | 1 | -1/+2 |
| 2011-03-24 | optimize spinlock spin | Rich Felker | 1 | -1/+1 |
| 2011-03-24 | fix non-atomicity of puts | Rich Felker | 1 | -1/+5 |
| 2011-03-24 | overhaul cancellation to fix resource leaks and dangerous behavior with signals•••this commit addresses two issues:
1. a race condition, whereby a cancellation request occurring after a
syscall returned from kernelspace but before the subsequent
CANCELPT_END would cause cancellable resource-allocating syscalls
(like open) to leak resources.
2. signal handlers invoked while the thread was blocked at a
cancellation point behaved as if asynchronous cancellation mode wer in
effect, resulting in potentially dangerous state corruption if a
cancellation request occurs.
the glibc/nptl implementation of threads shares both of these issues.
with this commit, both are fixed. however, cancellation points
encountered in a signal handler will not be acted upon if the signal
was received while the thread was already at a cancellation point.
they will of course be acted upon after the signal handler returns, so
in real-world usage where signal handlers quickly return, it should
not be a problem. it's possible to solve this problem too by having
sigaction() wrap all signal handlers with a function that uses a
pthread_cleanup handler to catch cancellation, patch up the saved
context, and return into the cancellable function that will catch and
act upon the cancellation. however that would be a lot of complexity
for minimal if any benefit...
| Rich Felker | 14 | -13/+49 |
| 2011-03-23 | very cheap double-free checks in malloc | Rich Felker | 1 | -0/+4 |
| 2011-03-20 | global cleanup to use the new syscall interface | Rich Felker | 160 | -238/+180 |
| 2011-03-19 | if returning errno value directly from a syscall, we need to negate it. | Rich Felker | 3 | -3/+3 |
| 2011-03-19 | honor namespace for i386 syscall.h, even though it's not a standard header | Rich Felker | 1 | -50/+50 |
| 2011-03-19 | fix typo in x86_64 part of syscall overhaul | Rich Felker | 1 | -1/+1 |
| 2011-03-19 | syscall overhaul part two - unify public and internal syscall interface•••with this patch, the syscallN() functions are no longer needed; a
variadic syscall() macro allows syscalls with anywhere from 0 to 6
arguments to be made with a single macro name. also, manually casting
each non-integer argument with (long) is no longer necessary; the
casts are hidden in the macros.
some source files which depended on being able to define the old macro
SYSCALL_RETURNS_ERRNO have been modified to directly use __syscall()
instead of syscall(). references to SYSCALL_SIGSET_SIZE and SYSCALL_LL
have also been changed.
x86_64 has not been tested, and may need a follow-up commit to fix any
minor bugs/oversights.
| Rich Felker | 26 | -316/+275 |
| 2011-03-19 | remove comment cruft that got left behind in x86_64 syscall.s | Rich Felker | 1 | -1/+0 |
| 2011-03-19 | add some ioctl stuff to sys/mount.h | Rich Felker | 1 | -0/+18 |
| 2011-03-19 | overhaul syscall interface•••this commit shuffles around the location of syscall definitions so
that we can make a syscall() library function with both SYS_* and
__NR_* style syscall names available to user applications, provides
the syscall() library function, and optimizes the code that performs
the actual inline syscalls in the library itself.
previously on i386 when built as PIC (shared library), syscalls were
incurring bus lock (lock prefix) overhead at entry and exit, due to
the way the ebx register was being loaded (xchg instruction with a
memory operand). now the xchg takes place between two registers.
further cleanup to arch/$(ARCH)/syscall.h is planned.
| Rich Felker | 11 | -749/+1577 |
| 2011-03-18 | some linux headers useful from user apps.•••i'm still not sure whether it's a good idea to include or use any of
these, but i'll add them for now. it may make more sense to just add
official kernel headers to the include path for compiling programs
that need them.
| Rich Felker | 3 | -0/+550 |
| 2011-03-18 | various legacy and linux-specific stuff•••this commit is part of an effort to make more of busybox work
out-of-the-box.
| Rich Felker | 7 | -1/+122 |
| 2011-03-18 | document changes for 0.7.1 | Rich Felker | 1 | -0/+9 |
| 2011-03-18 | implement [v]swprintf | Rich Felker | 4 | -3/+63 |
| 2011-03-17 | implement wprintf family of functions•••this implementation is extremely ugly and inefficient, but it avoids a
good deal of code duplication and bloat. it may be cleaned up later to
eliminate the remaining code duplication and some of the warts, but i
don't really care about its performance.
note that swprintf is not yet implemented.
| Rich Felker | 4 | -0/+387 |
| 2011-03-17 | fix broken wmemchr (unbounded search) | Rich Felker | 1 | -1/+1 |
| 2011-03-17 | implement robust mutexes•••some of this code should be cleaned up, e.g. using macros for some of
the bit flags, masks, etc. nonetheless, the code is believed to be
working and correct at this point.
| Rich Felker | 10 | -10/+84 |
| 2011-03-17 | avoid function call to pthread_self in mutex unlock•••if the mutex was previously locked, we can assume pthread_self was
already called at the time of locking, and thus that the thread
pointer is initialized.
| Rich Felker | 1 | -1/+1 |
| 2011-03-17 | reorder mutex struct fields to make room for pointers (upcoming robust mutexes)•••the layout has been chosen so that pointer slots 3 and 4 fit between
the integer slots on 32-bit archs, and come after the integer slots on
64-bit archs.
| Rich Felker | 1 | -1/+3 |
| 2011-03-17 | unify lock and owner fields of mutex structure•••this change is necessary to free up one slot in the mutex structure so
that we can use doubly-linked lists in the implementation of robust
mutexes.
| Rich Felker | 4 | -8/+6 |
| 2011-03-17 | optimize contended normal mutex case; add int compare-and-swap atomic | Rich Felker | 3 | -1/+15 |
| 2011-03-16 | simplify logic, slightly optimize contended case for non-default mutex types | Rich Felker | 1 | -4/+2 |
| 2011-03-16 | correct error returns for error-checking mutexes | Rich Felker | 2 | -2/+6 |
| 2011-03-16 | cut out a syscall on thread creation in the case where guard size is 0 | Rich Felker | 1 | -1/+1 |
| 2011-03-16 | don't expose EAGAIN, etc. from timed futex wait to caller | Rich Felker | 1 | -1/+4 |
| 2011-03-16 | optimize file locking: avoid cache-polluting writes to global storage | Rich Felker | 2 | -3/+5 |
| 2011-03-14 | partially-written draft of fmemopen, still in #if 0 | Rich Felker | 1 | -3/+48 |
| 2011-03-14 | remove some old cruft from sys/types.h | Rich Felker | 1 | -1/+0 |
| 2011-03-12 | misplaced & in times() made it fail to work, and clobber the stack | Rich Felker | 1 | -1/+1 |
| 2011-03-12 | implement flockfile api, rework stdio locking | Rich Felker | 9 | -15/+66 |
| 2011-03-12 | pthread.h needs clockid_t•••actually it gets this from time.h if _POSIX_C_SOURCE or any other
feature test macros are defined, but it breaks if they're not.
| Rich Felker | 1 | -0/+1 |
| 2011-03-11 | document some additional important changes | Rich Felker | 1 | -1/+2 |
| 2011-03-11 | update whatsnew file for release of 0.7.0 | Rich Felker | 1 | -2/+4 |
| 2011-03-11 | match dimensions so we can use all slots without invoking OOB-array-access | Rich Felker | 2 | -10/+10 |
| 2011-03-11 | implement dummy pthread_attr_[gs]etschedparam functions•••for some reason these functions are not shaded by the PS/TPS option in
POSIX, so presumably they are mandatory, even though the functionality
they offer is optional. for now, provide them in case any programs
depend on their existence, but disallow any priority except the
default.
| Rich Felker | 2 | -0/+14 |
| 2011-03-11 | fix pthread_attr_* implementations to match corrected prototypes | Rich Felker | 4 | -4/+4 |
| 2011-03-11 | fix missing ENOTSUP error code | Rich Felker | 2 | -0/+2 |
