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unix: add PthreadSigmask for Linux

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Add a syscall wrapper for SYS_RT_SIGPROCMASK and export it as
PthreadSigmask. The latter is defined by POSIX and can therefore
be implemented by Darwin, etc. later on.

Follow the approach used by Signalfd of passing _C__NSIG/8 as
sigsetsize. This avoids exporting _C__NSIG and allows the syscall
to work with the current definition of Sigset_t, which doesn't
match the kernel definition of Sigset_t.

Updates golang/go#55349

Change-Id: I49dc93366a7d316d820b0c25ecdef2ebb584634b
Reviewed-on: https://go-review.googlesource.com/c/sys/+/435095
Reviewed-by: Tobias Klauser <tobias.klauser@gmail.com>
Reviewed-by: Ian Lance Taylor <iant@google.com>
Auto-Submit: Tobias Klauser <tobias.klauser@gmail.com>
Reviewed-by: Cherry Mui <cherryyz@google.com>
Auto-Submit: Ian Lance Taylor <iant@google.com>
TryBot-Result: Gopher Robot <gobot@golang.org>
Run-TryBot: Tobias Klauser <tobias.klauser@gmail.com>
Run-TryBot: Ian Lance Taylor <iant@google.com>
This commit is contained in:
Lorenz Bauer
2022-09-27 09:39:37 +00:00
committed by Gopher Robot
parent 8cfa568d3c
commit d9d178bc13
2 changed files with 20 additions and 1 deletions
Download Patch File Download Diff File Expand all files Collapse all files

11
unix/syscall_linux.go
View File

@@ -2368,6 +2368,16 @@ func Setitimer(which ItimerWhich, it Itimerval) (Itimerval, error) {
return prev, nil
}
//sysnb rtSigprocmask(how int, set *Sigset_t, oldset *Sigset_t, sigsetsize uintptr) (err error) = SYS_RT_SIGPROCMASK
func PthreadSigmask(how int, set, oldset *Sigset_t) error {
if oldset != nil {
// Explicitly clear in case Sigset_t is larger than _C__NSIG.
*oldset = Sigset_t{}
}
return rtSigprocmask(how, set, oldset, _C__NSIG/8)
}
/*
* Unimplemented
*/
@@ -2426,7 +2436,6 @@ func Setitimer(which ItimerWhich, it Itimerval) (Itimerval, error) {
// RestartSyscall
// RtSigaction
// RtSigpending
// RtSigprocmask
// RtSigqueueinfo
// RtSigreturn
// RtSigsuspend

10
unix/zsyscall_linux.go
View File

@@ -2151,3 +2151,13 @@ func setitimer(which int, newValue *Itimerval, oldValue *Itimerval) (err error)
}
return
}
// THIS FILE IS GENERATED BY THE COMMAND AT THE TOP; DO NOT EDIT
func rtSigprocmask(how int, set *Sigset_t, oldset *Sigset_t, sigsetsize uintptr) (err error) {
_, _, e1 := RawSyscall6(SYS_RT_SIGPROCMASK, uintptr(how), uintptr(unsafe.Pointer(set)), uintptr(unsafe.Pointer(oldset)), uintptr(sigsetsize), 0, 0)
if e1 != 0 {
err = errnoErr(e1)
}
return
}