compiler/natives/src/runtime: Add noop implementation of CallersFrames.

dmitshur · dmitshur · commit 0927aef93add · 2017-08-25T14:19:47.000-04:00
In Go 1.9, runtime.panicwrap uses CallersFrames. So it needs to be
implemented (as well as the types it uses). Create a noop implementation
for now to resolve an undeclared name error.

A more functioning implementation may be possible, and needs to be
investigated (see Caller implementation for inspiration).

Fixes:

	../src/runtime/error.go:136:12: undeclared name: CallersFrames
diff --git a/compiler/natives/src/runtime/runtime.go b/compiler/natives/src/runtime/runtime.go
@@ -63,6 +63,23 @@ func Callers(skip int, pc []uintptr) int {
 	return 0
 }
 
+// CallersFrames is not implemented for GOARCH=js.
+// TODO: Implement if possible.
+func CallersFrames(callers []uintptr) *Frames { return &Frames{} }
+
+type Frames struct{}
+
+func (ci *Frames) Next() (frame Frame, more bool) { return }
+
+type Frame struct {
+	PC       uintptr
+	Func     *Func
+	Function string
+	File     string
+	Line     int
+	Entry    uintptr
+}
+
 func GC() {
 }
 
