Stowage/go
2
0
Fork 0
mirror of https://github.com/golang/go.git synced 2025-12-08 06:10:04 +00:00
Code Issues Projects Releases Packages Wiki Activity

runtime: drop sigfwd from signal forwarding unsupported platforms

Browse source 
This change splits signal_unix.go into signal_unix.go and
signal2_unix.go and removes the fake symbol sigfwd from signal
forwarding unsupported platforms for clarification purpose.

Change-Id: I205eab5cf1930fda8a68659b35cfa9f3a0e67ca6
Reviewed-on: https://go-review.googlesource.com/12062
Reviewed-by: Ian Lance Taylor <iant@golang.org>
This commit is contained in:
Mikio Hara 2015-07-12 09:23:37 +09:00
parent 02d2db18a7
commit 9fb79380f0
11 changed files with 48 additions and 64 deletions
Download patch file Download diff file Expand all files Collapse all files

36
src/runtime/signal_unix.go
View file

@ -6,43 +6,9 @@
package runtime
import "unsafe"
import _ "unsafe" // for go:linkname
//go:linkname os_sigpipe os.sigpipe
func os_sigpipe() {
systemstack(sigpipe)
}
// Determines if the signal should be handled by Go and if not, forwards the
// signal to the handler that was installed before Go's. Returns whether the
// signal was forwarded.
//go:nosplit
func sigfwdgo(sig uint32, info *siginfo, ctx unsafe.Pointer) bool {
g := getg()
c := &sigctxt{info, ctx}
if sig >= uint32(len(sigtable)) {
return false
}
fwdFn := fwdSig[sig]
flags := sigtable[sig].flags
// If there is no handler to forward to, no need to forward.
if fwdFn == _SIG_DFL {
return false
}
// Only forward synchronous signals.
if c.sigcode() == _SI_USER || flags&_SigPanic == 0 {
return false
}
// Determine if the signal occurred inside Go code. We test that:
// (1) we were in a goroutine (i.e., m.curg != nil), and
// (2) we weren't in CGO (i.e., m.curg.syscallsp == 0).
if g != nil && g.m != nil && g.m.curg != nil && g.m.curg.syscallsp == 0 {
return false
}
// Signal not handled by Go, forward it.
if fwdFn != _SIG_IGN {
sigfwd(fwdFn, sig, info, ctx)
}
return true
}