runtime: add ctxt parameter to cgocallback called from Go

The cgocallback function picked up a ctxt parameter in CL 22508.
That CL updated the assembler implementation, but there are a few
mentions in Go code that were not updated. This CL fixes that.

Fixes #16326

Change-Id: I5f68e23565c6a0b11057aff476d13990bff54a66
Reviewed-on: https://go-review.googlesource.com/24848
Run-TryBot: Brad Fitzpatrick <[email protected]>
TryBot-Result: Gobot Gobot <[email protected]>
Reviewed-by: Brad Fitzpatrick <[email protected]>
Reviewed-by: Minux Ma <[email protected]>

Author: ianlancetaylor

src/runtime/cgocall.go

@@ -44,7 +44,7 @@
 // call arbitrary Go code directly and must be careful not to allocate
 // memory or use up m->g0's stack.
 //
-// _cgoexp_GoF calls runtime.cgocallback(p.GoF, frame, framesize).
+// _cgoexp_GoF calls runtime.cgocallback(p.GoF, frame, framesize, ctxt).
 // (The reason for having _cgoexp_GoF instead of writing a crosscall3
 // to make this call directly is that _cgoexp_GoF, because it is compiled
 // with 6c instead of gcc, can refer to dotted names like

src/runtime/os_nacl.go

@@ -246,7 +246,7 @@ func memlimit() uintptr {
 //go:norace
 //go:nowritebarrierrec
 func badsignal(sig uintptr) {
-	cgocallback(unsafe.Pointer(funcPC(badsignalgo)), noescape(unsafe.Pointer(&sig)), unsafe.Sizeof(sig))
+	cgocallback(unsafe.Pointer(funcPC(badsignalgo)), noescape(unsafe.Pointer(&sig)), unsafe.Sizeof(sig), 0)
 }
 
 func badsignalgo(sig uintptr) {

src/runtime/signal1_unix.go

@@ -338,7 +338,7 @@ func sigNotOnStack(sig uint32) {
 //go:norace
 //go:nowritebarrierrec
 func badsignal(sig uintptr, c *sigctxt) {
-	cgocallback(unsafe.Pointer(funcPC(badsignalgo)), noescape(unsafe.Pointer(&sig)), unsafe.Sizeof(sig)+unsafe.Sizeof(c))
+	cgocallback(unsafe.Pointer(funcPC(badsignalgo)), noescape(unsafe.Pointer(&sig)), unsafe.Sizeof(sig)+unsafe.Sizeof(c), 0)
 }
 
 func badsignalgo(sig uintptr, c *sigctxt) {

src/runtime/signal_darwin.go

@@ -70,12 +70,12 @@ func sigtrampgo(fn uintptr, infostyle, sig uint32, info *siginfo, ctx unsafe.Poi
 		sigaltstack(nil, &st)
 		if st.ss_flags&_SS_DISABLE != 0 {
 			setg(nil)
-			cgocallback(unsafe.Pointer(funcPC(noSignalStack)), noescape(unsafe.Pointer(&sig)), unsafe.Sizeof(sig))
+			cgocallback(unsafe.Pointer(funcPC(noSignalStack)), noescape(unsafe.Pointer(&sig)), unsafe.Sizeof(sig), 0)
 		}
 		stsp := uintptr(unsafe.Pointer(st.ss_sp))
 		if sp < stsp || sp >= stsp+st.ss_size {
 			setg(nil)
-			cgocallback(unsafe.Pointer(funcPC(sigNotOnStack)), noescape(unsafe.Pointer(&sig)), unsafe.Sizeof(sig))
+			cgocallback(unsafe.Pointer(funcPC(sigNotOnStack)), noescape(unsafe.Pointer(&sig)), unsafe.Sizeof(sig), 0)
 		}
 		g.m.gsignal.stack.lo = stsp
 		g.m.gsignal.stack.hi = stsp + st.ss_size

src/runtime/signal_freebsd.go

@@ -66,12 +66,12 @@ func sigtrampgo(sig uint32, info *siginfo, ctx unsafe.Pointer) {
 		sigaltstack(nil, &st)
 		if st.ss_flags&_SS_DISABLE != 0 {
 			setg(nil)
-			cgocallback(unsafe.Pointer(funcPC(noSignalStack)), noescape(unsafe.Pointer(&sig)), unsafe.Sizeof(sig))
+			cgocallback(unsafe.Pointer(funcPC(noSignalStack)), noescape(unsafe.Pointer(&sig)), unsafe.Sizeof(sig), 0)
 		}
 		stsp := uintptr(unsafe.Pointer(st.ss_sp))
 		if sp < stsp || sp >= stsp+st.ss_size {
 			setg(nil)
-			cgocallback(unsafe.Pointer(funcPC(sigNotOnStack)), noescape(unsafe.Pointer(&sig)), unsafe.Sizeof(sig))
+			cgocallback(unsafe.Pointer(funcPC(sigNotOnStack)), noescape(unsafe.Pointer(&sig)), unsafe.Sizeof(sig), 0)
 		}
 		g.m.gsignal.stack.lo = stsp
 		g.m.gsignal.stack.hi = stsp + st.ss_size

src/runtime/signal_openbsd.go

@@ -66,12 +66,12 @@ func sigtrampgo(sig uint32, info *siginfo, ctx unsafe.Pointer) {
 		sigaltstack(nil, &st)
 		if st.ss_flags&_SS_DISABLE != 0 {
 			setg(nil)
-			cgocallback(unsafe.Pointer(funcPC(noSignalStack)), noescape(unsafe.Pointer(&sig)), unsafe.Sizeof(sig))
+			cgocallback(unsafe.Pointer(funcPC(noSignalStack)), noescape(unsafe.Pointer(&sig)), unsafe.Sizeof(sig), 0)
 		}
 		stsp := uintptr(unsafe.Pointer(st.ss_sp))
 		if sp < stsp || sp >= stsp+st.ss_size {
 			setg(nil)
-			cgocallback(unsafe.Pointer(funcPC(sigNotOnStack)), noescape(unsafe.Pointer(&sig)), unsafe.Sizeof(sig))
+			cgocallback(unsafe.Pointer(funcPC(sigNotOnStack)), noescape(unsafe.Pointer(&sig)), unsafe.Sizeof(sig), 0)
 		}
 		g.m.gsignal.stack.lo = stsp
 		g.m.gsignal.stack.hi = stsp + st.ss_size

src/runtime/signal_sigtramp.go

@@ -37,12 +37,12 @@ func sigtrampgo(sig uint32, info *siginfo, ctx unsafe.Pointer) {
 		sigaltstack(nil, &st)
 		if st.ss_flags&_SS_DISABLE != 0 {
 			setg(nil)
-			cgocallback(unsafe.Pointer(funcPC(noSignalStack)), noescape(unsafe.Pointer(&sig)), unsafe.Sizeof(sig))
+			cgocallback(unsafe.Pointer(funcPC(noSignalStack)), noescape(unsafe.Pointer(&sig)), unsafe.Sizeof(sig), 0)
 		}
 		stsp := uintptr(unsafe.Pointer(st.ss_sp))
 		if sp < stsp || sp >= stsp+st.ss_size {
 			setg(nil)
-			cgocallback(unsafe.Pointer(funcPC(sigNotOnStack)), noescape(unsafe.Pointer(&sig)), unsafe.Sizeof(sig))
+			cgocallback(unsafe.Pointer(funcPC(sigNotOnStack)), noescape(unsafe.Pointer(&sig)), unsafe.Sizeof(sig), 0)
 		}
 		g.m.gsignal.stack.lo = stsp
 		g.m.gsignal.stack.hi = stsp + st.ss_size

src/runtime/stubs.go

@@ -98,7 +98,7 @@ func noescape(p unsafe.Pointer) unsafe.Pointer {
 	return unsafe.Pointer(x ^ 0)
 }
 
-func cgocallback(fn, frame unsafe.Pointer, framesize uintptr)
+func cgocallback(fn, frame unsafe.Pointer, framesize, ctxt uintptr)
 func gogo(buf *gobuf)
 func gosave(buf *gobuf)
 func mincore(addr unsafe.Pointer, n uintptr, dst *byte) int32
@@ -143,7 +143,7 @@ func goexit(neverCallThisFunction)
 // cgocallback_gofunc is not called from go, only from cgocallback,
 // so the arguments will be found via cgocallback's pointer-declared arguments.
 // See the assembly implementations for more details.
-func cgocallback_gofunc(fv uintptr, frame uintptr, framesize uintptr)
+func cgocallback_gofunc(fv uintptr, frame uintptr, framesize, ctxt uintptr)
 
 // publicationBarrier performs a store/store barrier (a "publication"
 // or "export" barrier). Some form of synchronization is required