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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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25
libc/runtime/fork-nt.c
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@ -314,24 +314,13 @@ textwindows int sys_fork_nt(void) {
}
}
if (ok) {
if (!weaken(__sighandrvas) ||
weaken(__sighandrvas)[SIGCHLD] != SIG_IGN) {
g_fds.p[pid].kind = kFdProcess;
g_fds.p[pid].handle = procinfo.hProcess;
g_fds.p[pid].flags = O_CLOEXEC;
untrackpid = -1;
rc = pid;
} else {
/*
* XXX: Ignoring SIGCHLD should track the process information.
* What we need to do instead, is periodically check if a
* process has exited and remove it automatically via i/o
* functions like poll() so it doesn't get zombdied.
*/
STRACE("fork() parent closing process handle b/c SIGCHLD=SIG_IGN");
rc = GetProcessId(procinfo.hProcess);
CloseHandle(procinfo.hProcess);
}
// XXX: this should be tracked in a separate data structure
g_fds.p[pid].kind = kFdProcess;
g_fds.p[pid].handle = procinfo.hProcess;
g_fds.p[pid].flags = O_CLOEXEC;
g_fds.p[pid].zombie = false;
untrackpid = -1;
rc = pid;
} else {
rc = __winerr();
TerminateProcess(procinfo.hProcess, 127);