riscv/musl - musl - Gitea: Git with a cup of tea

Commit Graph

Author	SHA1	Message	Date
Rich Felker	8ae2fa6563	fix non-atomicity of puts	15 years ago
Rich Felker	b470030f83	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...	15 years ago
Rich Felker	0958200166	very cheap double-free checks in malloc	15 years ago
Rich Felker	aa398f56fa	global cleanup to use the new syscall interface	15 years ago
Rich Felker	be82e122bf	if returning errno value directly from a syscall, we need to negate it.	15 years ago
Rich Felker	bae862ab18	honor namespace for i386 syscall.h, even though it's not a standard header	15 years ago
Rich Felker	7877db6b2f	fix typo in x86_64 part of syscall overhaul	15 years ago
Rich Felker	685e40bb09	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.	15 years ago
Rich Felker	462dbfc207	remove comment cruft that got left behind in x86_64 syscall.s	15 years ago
Rich Felker	b0e83133e2	add some ioctl stuff to sys/mount.h	15 years ago
Rich Felker	d00ff2950e	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.	15 years ago
Rich Felker	56fd65e861	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.	15 years ago
Rich Felker	f5ba2bc9ca	various legacy and linux-specific stuff this commit is part of an effort to make more of busybox work out-of-the-box.	15 years ago
Rich Felker	fc27b96c7d	document changes for 0.7.1	15 years ago
Rich Felker	e18b563821	implement [v]swprintf	15 years ago
Rich Felker	c35bb6645f	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.	15 years ago
Rich Felker	a012aa879f	fix broken wmemchr (unbounded search)	15 years ago
Rich Felker	047e434ef5	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.	15 years ago
Rich Felker	18c7ea8055	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.	15 years ago
Rich Felker	93cc986ab3	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.	15 years ago
Rich Felker	b1c43161c2	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.	15 years ago
Rich Felker	e914f8b7ec	optimize contended normal mutex case; add int compare-and-swap atomic	15 years ago
Rich Felker	1d59f1eddb	simplify logic, slightly optimize contended case for non-default mutex types	15 years ago
Rich Felker	d4f9e0b364	correct error returns for error-checking mutexes	15 years ago
Rich Felker	29fae65780	cut out a syscall on thread creation in the case where guard size is 0	15 years ago
Rich Felker	cc832d8a31	don't expose EAGAIN, etc. from timed futex wait to caller	15 years ago
Rich Felker	4d9cc0b399	optimize file locking: avoid cache-polluting writes to global storage	15 years ago
Rich Felker	9dd7d7e3f6	partially-written draft of fmemopen, still in #if 0	15 years ago
Rich Felker	b446c55b6f	remove some old cruft from sys/types.h	15 years ago
Rich Felker	eff62b8a96	misplaced & in times() made it fail to work, and clobber the stack	15 years ago
Rich Felker	5eb0d33ec0	implement flockfile api, rework stdio locking	15 years ago
Rich Felker	d8d19f4d46	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.	15 years ago
Rich Felker	9f50b77d2b	document some additional important changes	15 years ago
Rich Felker	6f05b6bbd5	update whatsnew file for release of 0.7.0	15 years ago
Rich Felker	8bb0e48889	match dimensions so we can use all slots without invoking OOB-array-access	15 years ago
Rich Felker	243b542382	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.	15 years ago
Rich Felker	1659aa0e62	fix pthread_attr_* implementations to match corrected prototypes	15 years ago
Rich Felker	cabf2ff349	fix missing ENOTSUP error code	15 years ago
Rich Felker	f1821fce81	missing const in some pthread_attr_* prototypes	15 years ago
Rich Felker	2676198733	formatting whatsnew file	15 years ago
Rich Felker	8d07a0350e	list major changes in preparation for release	15 years ago
Rich Felker	682a0f271f	fix failure behavior of sem_open when sem does not exist	15 years ago
Rich Felker	cfe581b6bc	fix some semaphore wait semantics (race condition deadlock and error checking)	15 years ago
Rich Felker	81af503610	fix sem_open and sem_close to obey posix semantics multiple opens of the same named semaphore must return the same pointer, and only the last close can unmap it. thus the ugly global state keeping track of mappings. the maximum number of distinct named semaphores that can be opened is limited sufficiently small that the linear searches take trivial time, especially compared to the syscall overhead of these functions.	15 years ago
Rich Felker	5fcebcde6a	optimize pthread termination in the non-detached case we can avoid blocking signals by simply using a flag to mark that the thread has exited and prevent it from getting counted in the rsyscall signal-pingpong. this restores the original pthread create/join throughput from before the sigprocmask call was added.	15 years ago
Rich Felker	dc54a7cbb9	fix errors in sigqueue (potential information leak, wrong behavior) 1. any padding in the siginfo struct was not necessarily zero-filled, so it might have contained private data off the caller's stack. 2. the uid and pid must be filled in from userspace. the previous rsyscall fix broke rsyscalls because the values were always incorrect.	15 years ago
Rich Felker	52213f7341	security fix: check that cancel/rsyscall signal was sent by the process itself	15 years ago
Rich Felker	11dbbe9fba	more cancellation points: tcdrain, clock_nanosleep	15 years ago
Rich Felker	c8c4ef7d44	remove useless return value checks for functions that cannot fail	15 years ago
Rich Felker	0f8cc94d68	make sigsuspend a cancellation point	15 years ago

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