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Improve locks and signals

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- Introduce fast spinlock API
- Double rand64() perf w/ spinlock
- Improve raise() on New Technology
- Support gettid() across platforms
- Implement SA_NODEFER on New Technology
- Move the lock intrinsics into LIBC_INTRIN
- Make SIGTRAP recoverable on New Technology
- Block SIGCHLD in wait4() on New Technology
- Add threading prototypes for XNU and FreeBSD
- Rewrite abort() fixing its minor bugs on XNU/NT
- Shave down a lot of the content in libc/bits/bits.h
- Let signal handlers modify CPU registers on New Technology
This commit is contained in:
Justine Tunney 2022-04-12 05:20:17 -07:00
parent f68f1789bd
commit 046c7ebd4a
110 changed files with 1514 additions and 876 deletions
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19
libc/calls/wait4-nt.c
View file

@ -19,6 +19,7 @@
#include "libc/assert.h"
#include "libc/calls/calls.h"
#include "libc/calls/internal.h"
#include "libc/calls/sig.internal.h"
#include "libc/calls/sigbits.h"
#include "libc/calls/strace.internal.h"
#include "libc/calls/struct/rusage.h"
@ -40,11 +41,13 @@
#include "libc/runtime/runtime.h"
#include "libc/str/str.h"
#include "libc/sysv/consts/o.h"
#include "libc/sysv/consts/sig.h"
#include "libc/sysv/consts/w.h"
#include "libc/sysv/errfuns.h"
textwindows int sys_wait4_nt(int pid, int *opt_out_wstatus, int options,
struct rusage *opt_out_rusage) {
static textwindows int sys_wait4_nt_impl(int pid, int *opt_out_wstatus,
int options,
struct rusage *opt_out_rusage) {
int pids[64];
int64_t handle;
int64_t handles[64];
@ -129,3 +132,15 @@ textwindows int sys_wait4_nt(int pid, int *opt_out_wstatus, int options,
return pids[i];
}
}
textwindows int sys_wait4_nt(int pid, int *opt_out_wstatus, int options,
struct rusage *opt_out_rusage) {
int rc;
sigset_t mask, oldmask;
sigemptyset(&mask);
sigaddset(&mask, SIGCHLD);
__sig_mask(SIG_BLOCK, &mask, &oldmask);
rc = sys_wait4_nt_impl(pid, opt_out_wstatus, options, opt_out_rusage);
__sig_mask(SIG_SETMASK, &oldmask, 0);
return rc;
}