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Make signal handling work well across platforms

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- Fix sigsuspend() on XNU
- Fix strsignal() on non-Linux
- Add unit tests for strsignal()
- Add unit tests for setitimer()
- Add unit tests for sigsuspend()
- Rewrite setitimer() for New Technology
- Rewrite nanosleep() for New Technology
- Polyfill SIGALRM on the New Technology
- select(0,0,0,0) on NT now calls pause()
- Remove some NTDLL calls that aren't needed
- Polyfill SA_NOCLDWAIT on the New Technology
- Polyfill SA_RESETHAND on the New Technology
- Polyfill sigprocmask() on the New Technology
- Polyfill SIGCHLD+SIG_IGN on the New Technology
- Polyfill SA_RESTART masking on the New Technology
- Deliver console signals from main thread on New Technology
- Document SA_RESTART behavior w/ @sarestartable / @norestart
- System call trace in MODE=dbg now prints inherited FDs and signal mask
This commit is contained in:
Justine Tunney 2022-03-25 07:11:44 -07:00
parent 3b9e66ecba
commit 072e1d2910
82 changed files with 1388 additions and 450 deletions
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31
libc/calls/nanosleep.c
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@ -18,24 +18,35 @@
╚─────────────────────────────────────────────────────────────────────────────*/
#include "libc/calls/calls.h"
#include "libc/calls/internal.h"
#include "libc/calls/strace.internal.h"
#include "libc/dce.h"
#include "libc/sysv/errfuns.h"
/**
* Sleeps for a particular amount of time.
* @norestart
*/
int nanosleep(const struct timespec *req, struct timespec *rem) {
if (!req) return efault();
if (req->tv_sec < 0 || !(0 <= req->tv_nsec && req->tv_nsec <= 999999999)) {
return einval();
}
if (!IsWindows() && !IsMetal() && !IsXnu()) {
return sys_nanosleep(req, rem);
noinstrument int nanosleep(const struct timespec *req, struct timespec *rem) {
int rc;
char buf[2][45];
if (!req) {
rc = efault();
} else if (req->tv_sec < 0 ||
!(0 <= req->tv_nsec && req->tv_nsec <= 999999999)) {
rc = einval();
} else if (!IsWindows() && !IsMetal() && !IsXnu()) {
rc = sys_nanosleep(req, rem);
} else if (IsXnu()) {
return sys_nanosleep_xnu(req, rem);
rc = sys_nanosleep_xnu(req, rem);
} else if (IsMetal()) {
return enosys(); /* TODO: Sleep on Metal */
rc = enosys(); /* TODO: Sleep on Metal */
} else {
return sys_nanosleep_nt(req, rem);
rc = sys_nanosleep_nt(req, rem);
}
if (!__time_critical) {
STRACE("nanosleep(%s, [%s]) → %d% m",
__strace_timespec(buf[0], sizeof(buf[0]), rc, req),
__strace_timespec(buf[1], sizeof(buf[1]), rc, rem), rc);
}
return rc;
}