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

History

Rich Felker d5142642b8 pthread stack treatment overhaul for application-provided stacks, etc. the main goal of these changes is to address the case where an application provides a stack of size N, but TLS has size M that's a significant portion of the size N (or even larger than N), thus giving the application less stack space than it expected or no stack at all! the new strategy pthread_create now uses is to only put TLS on the application-provided stack if TLS is smaller than 1/8 of the stack size or 2k, whichever is smaller. this ensures that the application always has "close enough" to what it requested, and the threshold is chosen heuristically to make sure "sane" amounts of TLS still end up in the application-provided stack. if TLS does not fit the above criteria, pthread_create uses mmap to obtain space for TLS, but still uses the application-provided stack for actual call frame stack. this is to avoid wasting memory, and for the sake of supporting ugly hacks like garbage collection based on assumptions that the implementation will use the provided stack range. in order for the above heuristics to ever succeed, the amount of TLS space wasted on POSIX TSD (pthread_key_create based) needed to be reduced. otherwise, these changes would preclude any use of pthread_create without mmap, which would have serious memory usage and performance costs for applications trying to create huge numbers of threads using pre-allocated stack space. the new value of PTHREAD_KEYS_MAX is the minimum allowed by POSIX, 128. this should still be plenty more than real-world applications need, especially now that C11/gcc-style TLS is now supported in musl, and most apps and libraries choose to use that instead of POSIX TSD when available. at the same time, PTHREAD_STACK_MIN has been decreased. it was originally set to PAGE_SIZE back when there was no support for TLS or application-provided stacks, and requests smaller than a whole page did not make sense. now, there are two good reasons to support requests smaller than a page: (1) applications could provide pre-allocated stacks smaller than a page, and (2) with smaller stack sizes, stack+TLS+TSD can all fit in one page, making it possible for applications which need huge numbers of threads with minimal stack needs to allocate exactly one page per thread. the new value of PTHREAD_STACK_MIN, 2k, is aligned with the minimum size for sigaltstack.		13 years ago
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arpa	add inet_network (required for wine)	14 years ago
net	default features: make musl usable without feature test macros	14 years ago
netinet	SOL_TCP is nonstandard and not in the reserved namespace	13 years ago
netpacket	add netpacket/packet.h	15 years ago
scsi	add scsi headers scsi.h and sg.h	14 years ago
sys	add MOD_TAI to sys/timex.h and update STA_RONLY	14 years ago
aio.h	default features: make musl usable without feature test macros	14 years ago
alloca.h	alloca cannot be a function. #define it to the gcc builtin if possible	14 years ago
ar.h	some extra legacy header stuff	14 years ago
assert.h	__assert_fail(): remove _Noreturn, to get proper stacktraces	14 years ago
byteswap.h	remove all remaining redundant __restrict/__inline/_Noreturn defs	14 years ago
complex.h	make CMPLX macros available in complex.h in non-c11 mode as well	14 years ago
cpio.h	initial check-in, version 0.5.0	15 years ago
crypt.h	replace old and ugly crypt implementation	14 years ago
ctype.h	default features: make musl usable without feature test macros	14 years ago
dirent.h	feature test macros: make _GNU_SOURCE enable everything	14 years ago
dlfcn.h	add RTLD_NODELETE flag for dlopen	14 years ago
elf.h	microblaze TLS relocation support, completely untested	14 years ago
endian.h	default features: make musl usable without feature test macros	14 years ago
err.h	fix redundant _Noreturn def in err.h	14 years ago
errno.h	remove useless "extern" keywords in headers	15 years ago
fcntl.h	fix F_DUPFD_CLOEXEC being defined twice	14 years ago
features.h	add _ALL_SOURCE as an alias for _GNU_SOURCE/enable-everything	14 years ago
fenv.h	initial check-in, version 0.5.0	15 years ago
float.h	fix DECIMAL_DIG definitions	14 years ago
fnmatch.h	default features: make musl usable without feature test macros	14 years ago
ftw.h	remove unneeded judgemental commentary from ftw.h	14 years ago
getopt.h	add getopt reset support	14 years ago
glob.h	default features: make musl usable without feature test macros	14 years ago
grp.h	default features: make musl usable without feature test macros	14 years ago
iconv.h	remove all remaining redundant __restrict/__inline/_Noreturn defs	14 years ago
inttypes.h	fix a couple issues in the inttypes.h PRI/SCN macros	14 years ago
iso646.h	add previously-missing ios646.h	15 years ago
langinfo.h	extensive header cleanup for standards conformance & correctness	15 years ago
lastlog.h	some extra legacy header stuff	14 years ago
libgen.h	initial check-in, version 0.5.0	15 years ago
libintl.h	initial check-in, version 0.5.0	15 years ago
limits.h	pthread stack treatment overhaul for application-provided stacks, etc.	13 years ago
link.h	link.h: expose glibc/svr4 dynlinker debugging glue	14 years ago
locale.h	use a common definition of NULL as 0L for C and C++	14 years ago
malloc.h	initial check-in, version 0.5.0	15 years ago
math.h	add legacy header values.h	14 years ago
memory.h	add memory.h, bogus legacy alias for string.h	14 years ago
mntent.h	add profile for getmntent_r	15 years ago
monetary.h	remove all remaining redundant __restrict/__inline/_Noreturn defs	14 years ago
mqueue.h	remove all remaining redundant __restrict/__inline/_Noreturn defs	14 years ago
netdb.h	avoid breakage if somebody wrongly defines empty feature test macros	14 years ago
nl_types.h	initial check-in, version 0.5.0	15 years ago
paths.h	header file fixes: multiple include guard consistency and correctness	14 years ago
poll.h	add linux extension POLLRDHUP to poll.h	14 years ago
pthread.h	add stub versions of some missing optional pthread interfaces	14 years ago
pty.h	fix __cplusplus extern "C" closing brace in pty.h (typo?)	15 years ago
pwd.h	default features: make musl usable without feature test macros	14 years ago
regex.h	remove all remaining redundant __restrict/__inline/_Noreturn defs	14 years ago
resolv.h	header file fixes: multiple include guard consistency and correctness	14 years ago
sched.h	add support for thread scheduling (POSIX TPS option)	14 years ago
search.h	default features: make musl usable without feature test macros	14 years ago
semaphore.h	remove all remaining redundant __restrict/__inline/_Noreturn defs	14 years ago
setjmp.h	setjmp.h: add struct tag for sigjmp_buf (GCC C++ compatibility)	14 years ago
shadow.h	initial check-in, version 0.5.0	15 years ago
signal.h	add sigandset and sigorset (needed for qemu)	14 years ago
spawn.h	fix some restrict-qualifier mismatches in newly added interfaces	14 years ago
stdalign.h	implement "low hanging fruit" from C11	14 years ago
stdarg.h	use compiler builtins for variadic macros when available	15 years ago
stdbool.h	make stdbool.h conform to c99	15 years ago
stddef.h	use a common definition of NULL as 0L for C and C++	14 years ago
stdint.h	fix signedness errors in stdint.h constant macros	14 years ago
stdio.h	use a common definition of NULL as 0L for C and C++	14 years ago
stdio_ext.h	stdio_ext.h needs to include stdio.h, at least to get FILE...	14 years ago
stdlib.h	use a common definition of NULL as 0L for C and C++	14 years ago
stdnoreturn.h	add stdnoreturn.h (C11)	14 years ago
string.h	use a common definition of NULL as 0L for C and C++	14 years ago
strings.h	more locale_t interfaces (string stuff) and header updates	14 years ago
stropts.h	add isastream (obsolete STREAMS junk)	14 years ago
syscall.h	header file fixes: multiple include guard consistency and correctness	14 years ago
sysexits.h	add sysexits.h legacy header	15 years ago
syslog.h	default features: make musl usable without feature test macros	14 years ago
tar.h	initial check-in, version 0.5.0	15 years ago
termios.h	default features: make musl usable without feature test macros	14 years ago
tgmath.h	math: more correct tgmath.h type cast logic	14 years ago
time.h	use a common definition of NULL as 0L for C and C++	14 years ago
ucontext.h	fixup mcontext stuff to expost gregset_t/fpregset_t as appropriate	14 years ago
ulimit.h	initial check-in, version 0.5.0	15 years ago
unistd.h	use a common definition of NULL as 0L for C and C++	14 years ago
utime.h	initial check-in, version 0.5.0	15 years ago
utmp.h	some extra legacy header stuff	14 years ago
utmpx.h	utmpx.h is no longer under standards, so expose ut_exit structure	15 years ago
values.h	add legacy header values.h	14 years ago
wchar.h	use a common definition of NULL as 0L for C and C++	14 years ago
wctype.h	default features: make musl usable without feature test macros	14 years ago
wordexp.h	remove all remaining redundant __restrict/__inline/_Noreturn defs	14 years ago