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Make improvements

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- Improved async signal safety of read() particularly for longjmp()
- Started adding cancel cleanup handlers for locks / etc on Windows
- Make /dev/tty work better particularly for uses like `foo | less`
- Eagerly read console input into a linked list, so poll can signal
- Fix some libc definitional bugs, which configure scripts detected
This commit is contained in:
Justine Tunney 2023-09-21 07:30:39 -07:00
parent d6c2830850
commit 0c5dd7b342
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GPG key ID: BE714B4575D6E328
85 changed files with 1062 additions and 671 deletions
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15
libc/runtime/enable_tls.c
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@ -17,7 +17,6 @@
│ PERFORMANCE OF THIS SOFTWARE. │
╚─────────────────────────────────────────────────────────────────────────────*/
#include "ape/sections.internal.h"
#include "libc/assert.h"
#include "libc/calls/syscall-sysv.internal.h"
#include "libc/dce.h"
#include "libc/errno.h"
@ -120,8 +119,8 @@ textstartup void __enable_tls(void) {
// _tbss_start + _tbss_size:
// _tdata_start + _tls_size:
//
unassert(_tbss_start == _tdata_start + I(_tbss_offset));
unassert(_tbss_start + I(_tbss_size) == _tdata_start + I(_tls_size));
// unassert(_tbss_start == _tdata_start + I(_tbss_offset));
// unassert(_tbss_start + I(_tbss_size) == _tdata_start + I(_tls_size));
#ifdef __x86_64__
@ -136,10 +135,7 @@ textstartup void __enable_tls(void) {
// malloc() being linked, which links _mapanon(). otherwise
// if you exceed this, you need to __static_yoink("_mapanon").
// please note that it's probably too early to call calloc()
npassert(_weaken(_mapanon));
siz = ROUNDUP(siz, FRAMESIZE);
mem = _weaken(_mapanon)(siz);
npassert(mem);
}
if (IsAsan()) {
@ -158,10 +154,7 @@ textstartup void __enable_tls(void) {
if (siz <= sizeof(__static_tls)) {
mem = __static_tls;
} else {
npassert(_weaken(_mapanon));
siz = ROUNDUP(siz, FRAMESIZE);
mem = _weaken(_mapanon)(siz);
npassert(mem);
}
if (IsAsan()) {
@ -221,7 +214,9 @@ textstartup void __enable_tls(void) {
_pthread_list = &_pthread_static.list;
atomic_store_explicit(&_pthread_static.ptid, tid, memory_order_relaxed);
if (IsWindows()) {
npassert((_pthread_static.semaphore = CreateSemaphore(0, 0, 1, 0)));
if (!(_pthread_static.semaphore = CreateSemaphore(0, 0, 1, 0))) {
notpossible;
}
}
// copy in initialized data section