Initial commit: Go 1.23 release state

test/fixedbugs/bug260.go

@@ -0,0 +1,65 @@
+// run
+
+// Copyright 2010 The Go Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style
+// license that can be found in the LICENSE file
+
+// Test that structures pack densely, according to the alignment of the largest field.
+
+package main
+
+import (
+	"fmt"
+	"os"
+	"strconv"
+)
+
+type T1 struct {
+	x uint8
+}
+type T2 struct {
+	x uint16
+}
+type T4 struct {
+	x uint32
+}
+
+func main() {
+	report := len(os.Args) > 1
+	status := 0
+	var b1 [10]T1
+	a0, _ := strconv.ParseUint(fmt.Sprintf("%p", &b1[0])[2:], 16, 64)
+	a1, _ := strconv.ParseUint(fmt.Sprintf("%p", &b1[1])[2:], 16, 64)
+	if a1 != a0+1 {
+		fmt.Println("FAIL")
+		if report {
+			fmt.Println("alignment should be 1, is", a1-a0)
+		}
+		status = 1
+	}
+	var b2 [10]T2
+	a0, _ = strconv.ParseUint(fmt.Sprintf("%p", &b2[0])[2:], 16, 64)
+	a1, _ = strconv.ParseUint(fmt.Sprintf("%p", &b2[1])[2:], 16, 64)
+	if a1 != a0+2 {
+		if status == 0 {
+			fmt.Println("FAIL")
+			status = 1
+		}
+		if report {
+			fmt.Println("alignment should be 2, is", a1-a0)
+		}
+	}
+	var b4 [10]T4
+	a0, _ = strconv.ParseUint(fmt.Sprintf("%p", &b4[0])[2:], 16, 64)
+	a1, _ = strconv.ParseUint(fmt.Sprintf("%p", &b4[1])[2:], 16, 64)
+	if a1 != a0+4 {
+		if status == 0 {
+			fmt.Println("FAIL")
+			status = 1
+		}
+		if report {
+			fmt.Println("alignment should be 4, is", a1-a0)
+		}
+	}
+	os.Exit(status)
+}