ogle/debug/dwarf: add UnspecifiedType
Also update the handling of complex by clang.
See https://golang.org/cl/117280043/
and https://golang.org/cl/143570043
LGTM=nigeltao
R=nigeltao
https://golang.org/cl/124820044
diff --git a/debug/dwarf/type.go b/debug/dwarf/type.go
index 27baa63..5669c10 100644
--- a/debug/dwarf/type.go
+++ b/debug/dwarf/type.go
@@ -92,6 +92,11 @@
BasicType
}
+// An UnspecifiedType represents an implicit, unknown, ambiguous or nonexistent type.
+type UnspecifiedType struct {
+ BasicType
+}
+
// qualifiers
// A QualType represents a type that has the C/C++ "const", "restrict", or "volatile" qualifier.
@@ -475,6 +480,17 @@
typ = new(BoolType)
case encComplexFloat:
typ = new(ComplexType)
+ if name == "complex" {
+ // clang writes out 'complex' instead of 'complex float' or 'complex double'.
+ // clang also writes out a byte size that we can use to distinguish.
+ // See issue 8694.
+ switch byteSize, _ := e.Val(AttrByteSize).(int64); byteSize {
+ case 8:
+ name = "complex float"
+ case 16:
+ name = "complex double"
+ }
+ }
case encFloat:
typ = new(FloatType)
case encSigned:
@@ -715,6 +731,15 @@
typeCache[off] = typ
t.Name, _ = e.Val(AttrName).(string)
t.Type = typeOf(e, AttrType)
+
+ case TagUnspecifiedType:
+ // Unspecified type (DWARF v3 §5.2)
+ // Attributes:
+ // AttrName: name
+ t := new(UnspecifiedType)
+ typ = t
+ typeCache[off] = t
+ t.Name, _ = e.Val(AttrName).(string)
}
if err != nil {
