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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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21
libc/proc/wait4-nt.c
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@ -26,6 +26,7 @@
#include "libc/cosmo.h"
#include "libc/errno.h"
#include "libc/fmt/conv.h"
#include "libc/intrin/atomic.h"
#include "libc/intrin/dll.h"
#include "libc/intrin/strace.internal.h"
#include "libc/macros.internal.h"
@ -38,6 +39,7 @@
#include "libc/str/str.h"
#include "libc/sysv/consts/w.h"
#include "libc/sysv/errfuns.h"
#include "libc/thread/thread.h"
#include "libc/thread/tls.h"
#ifdef __x86_64__
@ -98,7 +100,7 @@ static textwindows int CheckZombies(int pid, int *wstatus,
}
static textwindows int WaitForProcess(int pid, int *wstatus, int options,
struct rusage *opt_out_rusage) {
struct rusage *rusage, uint64_t *m) {
int rc, *wv;
nsync_cv *cv;
struct Dll *e;
@ -106,7 +108,7 @@ static textwindows int WaitForProcess(int pid, int *wstatus, int options,
struct timespec deadline = timespec_zero;
// check list of processes that've already exited
if ((rc = CheckZombies(pid, wstatus, opt_out_rusage))) {
if ((rc = CheckZombies(pid, wstatus, rusage))) {
return rc;
}
@ -139,16 +141,16 @@ CheckForInterrupt:
if (_check_interrupts(kSigOpRestartable) == -1) return -1;
deadline = GetNextDeadline(deadline);
SpuriousWakeup:
BEGIN_BLOCKING_OPERATION;
++*wv;
atomic_store_explicit(&__get_tls()->tib_sigmask, *m, memory_order_release);
rc = nsync_cv_wait_with_deadline(cv, &__proc.lock, deadline, 0);
*m = atomic_exchange(&__get_tls()->tib_sigmask, -1);
--*wv;
END_BLOCKING_OPERATION;
if (rc == ECANCELED) return ecanceled();
if (pr && pr->iszombie) return ReapZombie(pr, wstatus, opt_out_rusage);
if (pr && pr->iszombie) return ReapZombie(pr, wstatus, rusage);
if (rc == ETIMEDOUT) goto CheckForInterrupt;
unassert(!rc);
if (!pr && (rc = CheckZombies(pid, wstatus, opt_out_rusage))) return rc;
if (!pr && (rc = CheckZombies(pid, wstatus, rusage))) return rc;
goto SpuriousWakeup;
}
@ -163,9 +165,12 @@ textwindows int sys_wait4_nt(int pid, int *opt_out_wstatus, int options,
// just does an "ignore ctrl-c" internally.
if (pid == 0) pid = -1;
if (pid < -1) pid = -pid;
uint64_t m = atomic_exchange(&__get_tls()->tib_sigmask, -1);
__proc_lock();
rc = WaitForProcess(pid, opt_out_wstatus, options, opt_out_rusage);
__proc_unlock();
pthread_cleanup_push((void *)__proc_unlock, 0);
rc = WaitForProcess(pid, opt_out_wstatus, options, opt_out_rusage, &m);
pthread_cleanup_pop(true);
atomic_store_explicit(&__get_tls()->tib_sigmask, m, memory_order_release);
return rc;
}