Merge release-20210601.0-33-g8d87a9418 (automated)

3 files changed, 188 insertions, 0 deletions

diff --git a/pkg/abi/linux/linux_abi_autogen_unsafe.go b/pkg/abi/linux/linux_abi_autogen_unsafe.go
index b77c2c972..b9f7f24da 100644
--- a/pkg/abi/linux/linux_abi_autogen_unsafe.go
+++ b/pkg/abi/linux/linux_abi_autogen_unsafe.go
@@ -101,6 +101,7 @@ var _ marshal.Marshallable = (*Sembuf)(nil)
 var _ marshal.Marshallable = (*ShmInfo)(nil)
 var _ marshal.Marshallable = (*ShmParams)(nil)
 var _ marshal.Marshallable = (*ShmidDS)(nil)
+var _ marshal.Marshallable = (*SigAction)(nil)
 var _ marshal.Marshallable = (*Sigevent)(nil)
 var _ marshal.Marshallable = (*SignalSet)(nil)
 var _ marshal.Marshallable = (*SignalfdSiginfo)(nil)
@@ -10809,6 +10810,143 @@ func (s *ShmidDS) WriteTo(writer io.Writer) (int64, error) {
 }
 
 // SizeBytes implements marshal.Marshallable.SizeBytes.
+func (s *SigAction) SizeBytes() int {
+    return 24 +
+        (*SignalSet)(nil).SizeBytes()
+}
+
+// MarshalBytes implements marshal.Marshallable.MarshalBytes.
+func (s *SigAction) MarshalBytes(dst []byte) {
+    hostarch.ByteOrder.PutUint64(dst[:8], uint64(s.Handler))
+    dst = dst[8:]
+    hostarch.ByteOrder.PutUint64(dst[:8], uint64(s.Flags))
+    dst = dst[8:]
+    hostarch.ByteOrder.PutUint64(dst[:8], uint64(s.Restorer))
+    dst = dst[8:]
+    s.Mask.MarshalBytes(dst[:s.Mask.SizeBytes()])
+    dst = dst[s.Mask.SizeBytes():]
+}
+
+// UnmarshalBytes implements marshal.Marshallable.UnmarshalBytes.
+func (s *SigAction) UnmarshalBytes(src []byte) {
+    s.Handler = uint64(hostarch.ByteOrder.Uint64(src[:8]))
+    src = src[8:]
+    s.Flags = uint64(hostarch.ByteOrder.Uint64(src[:8]))
+    src = src[8:]
+    s.Restorer = uint64(hostarch.ByteOrder.Uint64(src[:8]))
+    src = src[8:]
+    s.Mask.UnmarshalBytes(src[:s.Mask.SizeBytes()])
+    src = src[s.Mask.SizeBytes():]
+}
+
+// Packed implements marshal.Marshallable.Packed.
+//go:nosplit
+func (s *SigAction) Packed() bool {
+    return s.Mask.Packed()
+}
+
+// MarshalUnsafe implements marshal.Marshallable.MarshalUnsafe.
+func (s *SigAction) MarshalUnsafe(dst []byte) {
+    if s.Mask.Packed() {
+        gohacks.Memmove(unsafe.Pointer(&dst[0]), unsafe.Pointer(s),  uintptr(s.SizeBytes()))
+    } else {
+        // Type SigAction doesn't have a packed layout in memory, fallback to MarshalBytes.
+        s.MarshalBytes(dst)
+    }
+}
+
+// UnmarshalUnsafe implements marshal.Marshallable.UnmarshalUnsafe.
+func (s *SigAction) UnmarshalUnsafe(src []byte) {
+    if s.Mask.Packed() {
+        gohacks.Memmove(unsafe.Pointer(s), unsafe.Pointer(&src[0]), uintptr(s.SizeBytes()))
+    } else {
+        // Type SigAction doesn't have a packed layout in memory, fallback to UnmarshalBytes.
+        s.UnmarshalBytes(src)
+    }
+}
+
+// CopyOutN implements marshal.Marshallable.CopyOutN.
+//go:nosplit
+func (s *SigAction) CopyOutN(cc marshal.CopyContext, addr hostarch.Addr, limit int) (int, error) {
+    if !s.Mask.Packed() {
+        // Type SigAction doesn't have a packed layout in memory, fall back to MarshalBytes.
+        buf := cc.CopyScratchBuffer(s.SizeBytes()) // escapes: okay.
+        s.MarshalBytes(buf) // escapes: fallback.
+        return cc.CopyOutBytes(addr, buf[:limit]) // escapes: okay.
+    }
+
+    // Construct a slice backed by dst's underlying memory.
+    var buf []byte
+    hdr := (*reflect.SliceHeader)(unsafe.Pointer(&buf))
+    hdr.Data = uintptr(gohacks.Noescape(unsafe.Pointer(s)))
+    hdr.Len = s.SizeBytes()
+    hdr.Cap = s.SizeBytes()
+
+    length, err := cc.CopyOutBytes(addr, buf[:limit]) // escapes: okay.
+    // Since we bypassed the compiler's escape analysis, indicate that s
+    // must live until the use above.
+    runtime.KeepAlive(s) // escapes: replaced by intrinsic.
+    return length, err
+}
+
+// CopyOut implements marshal.Marshallable.CopyOut.
+//go:nosplit
+func (s *SigAction) CopyOut(cc marshal.CopyContext, addr hostarch.Addr) (int, error) {
+    return s.CopyOutN(cc, addr, s.SizeBytes())
+}
+
+// CopyIn implements marshal.Marshallable.CopyIn.
+//go:nosplit
+func (s *SigAction) CopyIn(cc marshal.CopyContext, addr hostarch.Addr) (int, error) {
+    if !s.Mask.Packed() {
+        // Type SigAction doesn't have a packed layout in memory, fall back to UnmarshalBytes.
+        buf := cc.CopyScratchBuffer(s.SizeBytes()) // escapes: okay.
+        length, err := cc.CopyInBytes(addr, buf) // escapes: okay.
+        // Unmarshal unconditionally. If we had a short copy-in, this results in a
+        // partially unmarshalled struct.
+        s.UnmarshalBytes(buf) // escapes: fallback.
+        return length, err
+    }
+
+    // Construct a slice backed by dst's underlying memory.
+    var buf []byte
+    hdr := (*reflect.SliceHeader)(unsafe.Pointer(&buf))
+    hdr.Data = uintptr(gohacks.Noescape(unsafe.Pointer(s)))
+    hdr.Len = s.SizeBytes()
+    hdr.Cap = s.SizeBytes()
+
+    length, err := cc.CopyInBytes(addr, buf) // escapes: okay.
+    // Since we bypassed the compiler's escape analysis, indicate that s
+    // must live until the use above.
+    runtime.KeepAlive(s) // escapes: replaced by intrinsic.
+    return length, err
+}
+
+// WriteTo implements io.WriterTo.WriteTo.
+func (s *SigAction) WriteTo(writer io.Writer) (int64, error) {
+    if !s.Mask.Packed() {
+        // Type SigAction doesn't have a packed layout in memory, fall back to MarshalBytes.
+        buf := make([]byte, s.SizeBytes())
+        s.MarshalBytes(buf)
+        length, err := writer.Write(buf)
+        return int64(length), err
+    }
+
+    // Construct a slice backed by dst's underlying memory.
+    var buf []byte
+    hdr := (*reflect.SliceHeader)(unsafe.Pointer(&buf))
+    hdr.Data = uintptr(gohacks.Noescape(unsafe.Pointer(s)))
+    hdr.Len = s.SizeBytes()
+    hdr.Cap = s.SizeBytes()
+
+    length, err := writer.Write(buf)
+    // Since we bypassed the compiler's escape analysis, indicate that s
+    // must live until the use above.
+    runtime.KeepAlive(s) // escapes: replaced by intrinsic.
+    return int64(length), err
+}
+
+// SizeBytes implements marshal.Marshallable.SizeBytes.
 func (s *Sigevent) SizeBytes() int {
     return 20 +
         1*44
diff --git a/pkg/abi/linux/linux_state_autogen.go b/pkg/abi/linux/linux_state_autogen.go
index 780edd2ee..6ff83b358 100644
--- a/pkg/abi/linux/linux_state_autogen.go
+++ b/pkg/abi/linux/linux_state_autogen.go
@@ -74,6 +74,40 @@ func (b *BPFInstruction) StateLoad(stateSourceObject state.Source) {
 	stateSourceObject.Load(3, &b.K)
 }
 
+func (s *SigAction) StateTypeName() string {
+	return "pkg/abi/linux.SigAction"
+}
+
+func (s *SigAction) StateFields() []string {
+	return []string{
+		"Handler",
+		"Flags",
+		"Restorer",
+		"Mask",
+	}
+}
+
+func (s *SigAction) beforeSave() {}
+
+// +checklocksignore
+func (s *SigAction) StateSave(stateSinkObject state.Sink) {
+	s.beforeSave()
+	stateSinkObject.Save(0, &s.Handler)
+	stateSinkObject.Save(1, &s.Flags)
+	stateSinkObject.Save(2, &s.Restorer)
+	stateSinkObject.Save(3, &s.Mask)
+}
+
+func (s *SigAction) afterLoad() {}
+
+// +checklocksignore
+func (s *SigAction) StateLoad(stateSourceObject state.Source) {
+	stateSourceObject.Load(0, &s.Handler)
+	stateSourceObject.Load(1, &s.Flags)
+	stateSourceObject.Load(2, &s.Restorer)
+	stateSourceObject.Load(3, &s.Mask)
+}
+
 func (c *ControlMessageIPPacketInfo) StateTypeName() string {
 	return "pkg/abi/linux.ControlMessageIPPacketInfo"
 }
@@ -182,6 +216,7 @@ func (w *WindowSize) StateLoad(stateSourceObject state.Source) {
 func init() {
 	state.Register((*IOEvent)(nil))
 	state.Register((*BPFInstruction)(nil))
+	state.Register((*SigAction)(nil))
 	state.Register((*ControlMessageIPPacketInfo)(nil))
 	state.Register((*KernelTermios)(nil))
 	state.Register((*WindowSize)(nil))
diff --git a/pkg/abi/linux/signal.go b/pkg/abi/linux/signal.go
index 6ca57ffbb..cedae3014 100644
--- a/pkg/abi/linux/signal.go
+++ b/pkg/abi/linux/signal.go
@@ -227,6 +227,21 @@ type Sigevent struct {
 	UnRemainder [44]byte
 }
 
+// LINT.IfChange
+
+// SigAction represents struct sigaction.
+//
+// +marshal
+// +stateify savable
+type SigAction struct {
+	Handler  uint64
+	Flags    uint64
+	Restorer uint64
+	Mask     SignalSet
+}
+
+// LINT.ThenChange(../../safecopy/safecopy_unsafe.go)
+
 // Possible values for Sigevent.Notify, aka struct sigevent::sigev_notify.
 const (
 	SIGEV_SIGNAL    = 0