// generate generates offline constraints for the entire program.
func (a *analysis) generate() {
start("Constraint generation")
if a.log != nil {
fmt.Fprintln(a.log, "==== Generating constraints")
}
// Create a dummy node since we use the nodeid 0 for
// non-pointerlike variables.
a.addNodes(tInvalid, "(zero)")
// Create the global node for panic values.
a.panicNode = a.addNodes(tEface, "panic")
// Create nodes and constraints for all methods of reflect.rtype.
// (Shared contours are used by dynamic calls to reflect.Type
// methods---typically just String().)
if rtype := a.reflectRtypePtr; rtype != nil {
a.genMethodsOf(rtype)
}
root := a.genRootCalls()
if a.config.BuildCallGraph {
a.result.CallGraph = callgraph.New(root.fn)
}
// Create nodes and constraints for all methods of all types
// that are dynamically accessible via reflection or interfaces.
for _, T := range a.prog.RuntimeTypes() {
a.genMethodsOf(T)
}
// Generate constraints for entire program.
for len(a.genq) > 0 {
cgn := a.genq[0]
a.genq = a.genq[1:]
a.genFunc(cgn)
}
// The runtime magically allocates os.Args; so should we.
if os := a.prog.ImportedPackage("os"); os != nil {
// In effect: os.Args = new([1]string)[:]
T := types.NewSlice(types.Typ[types.String])
obj := a.addNodes(sliceToArray(T), "<command-line args>")
a.endObject(obj, nil, "<command-line args>")
a.addressOf(T, a.objectNode(nil, os.Var("Args")), obj)
}
// Discard generation state, to avoid confusion after node renumbering.
a.panicNode = 0
a.globalval = nil
a.localval = nil
a.localobj = nil
stop("Constraint generation")
}
// createParams creates parameters for wrapper method fn based on its
// Signature.Params, which do not include the receiver.
// start is the index of the first regular parameter to use.
//
func createParams(fn *Function, start int) {
var last *Parameter
tparams := fn.Signature.Params()
for i, n := start, tparams.Len(); i < n; i++ {
last = fn.addParamObj(tparams.At(i))
}
if fn.Signature.Variadic() {
last.typ = types.NewSlice(last.typ)
}
}
func ext۰reflect۰SliceOf(fr *frame, args []value) value {
// Signature: func (t reflect.rtype) Type
return makeReflectType(rtype{types.NewSlice(args[0].(iface).v.(rtype).t)})
}
