Allow evaluation of function params

_fixtures/testvariables.go

@@ -7,7 +7,7 @@ type FooBar struct {
 	Bur string
 }
 
-func main() {
+func foobar(baz string) {
 	var (
 		a1 = "foo"
 		a2 = 6
@@ -18,5 +18,9 @@ func main() {
 		a7 = &FooBar{Baz: 5, Bur: "strum"}
 	)
 
-	fmt.Println(a1, a2, a3, a4, a5, a6, a7)
+	fmt.Println(a1, a2, a3, a4, a5, a6, a7, baz)
+}
+
+func main() {
+	foobar("bazburzum")
 }

proctl/proctl_linux_amd64.go

@@ -369,7 +369,7 @@ func (dbp *DebuggedProcess) EvalSymbol(name string) (*Variable, error) {
 			return nil, err
 		}
 
-		if entry.Tag != dwarf.TagVariable {
+		if entry.Tag != dwarf.TagVariable && entry.Tag != dwarf.TagFormalParameter {
 			continue
 		}
 

proctl/proctl_test.go

@@ -233,6 +233,7 @@ func TestVariableEvaluation(t *testing.T) {
 		{"a5", "len: 5 cap: 5 [1 2 3 4 5]", "struct []int"},
 		{"a6", "main.FooBar {Baz: 8, Bur: word}", "main.FooBar"},
 		{"a7", "*main.FooBar {Baz: 5, Bur: strum}", "*main.FooBar"},
+		{"baz", "bazburzum", "struct string"},
 	}
 
 	helper.WithTestProcess(executablePath, t, func(p *proctl.DebuggedProcess) {