Initial commit: Go 1.23 release state

test/makeslice.go

@@ -0,0 +1,149 @@
+// run
+
+// Copyright 2013 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.
+
+package main
+
+import (
+	"strings"
+	"unsafe"
+)
+
+func main() {
+	n := -1
+	testInts(uint64(n))
+	testBytes(uint64(n))
+
+	var t *byte
+	if unsafe.Sizeof(t) == 8 {
+		// Test mem > maxAlloc
+		testInts(1 << 59)
+
+		// Test elem.size*cap overflow
+		testInts(1<<63 - 1)
+
+		testInts(1<<64 - 1)
+		testBytes(1<<64 - 1)
+	} else {
+		testInts(1<<31 - 1)
+
+		// Test elem.size*cap overflow
+		testInts(1<<32 - 1)
+		testBytes(1<<32 - 1)
+	}
+}
+
+func shouldPanic(str string, f func()) {
+	defer func() {
+		err := recover()
+		if err == nil {
+			panic("did not panic")
+		}
+		s := err.(error).Error()
+		if !strings.Contains(s, str) {
+			panic("got panic " + s + ", want " + str)
+		}
+	}()
+
+	f()
+}
+
+func testInts(n uint64) {
+	testMakeInts(n)
+	testMakeCopyInts(n)
+	testMakeInAppendInts(n)
+}
+
+func testBytes(n uint64) {
+	testMakeBytes(n)
+	testMakeCopyBytes(n)
+	testMakeInAppendBytes(n)
+}
+
+// Test make panics for given length or capacity n.
+func testMakeInts(n uint64) {
+	type T []int
+	shouldPanic("len out of range", func() { _ = make(T, int(n)) })
+	shouldPanic("cap out of range", func() { _ = make(T, 0, int(n)) })
+	shouldPanic("len out of range", func() { _ = make(T, uint(n)) })
+	shouldPanic("cap out of range", func() { _ = make(T, 0, uint(n)) })
+	shouldPanic("len out of range", func() { _ = make(T, int64(n)) })
+	shouldPanic("cap out of range", func() { _ = make(T, 0, int64(n)) })
+	shouldPanic("len out of range", func() { _ = make(T, uint64(n)) })
+	shouldPanic("cap out of range", func() { _ = make(T, 0, uint64(n)) })
+}
+
+func testMakeBytes(n uint64) {
+	type T []byte
+	shouldPanic("len out of range", func() { _ = make(T, int(n)) })
+	shouldPanic("cap out of range", func() { _ = make(T, 0, int(n)) })
+	shouldPanic("len out of range", func() { _ = make(T, uint(n)) })
+	shouldPanic("cap out of range", func() { _ = make(T, 0, uint(n)) })
+	shouldPanic("len out of range", func() { _ = make(T, int64(n)) })
+	shouldPanic("cap out of range", func() { _ = make(T, 0, int64(n)) })
+	shouldPanic("len out of range", func() { _ = make(T, uint64(n)) })
+	shouldPanic("cap out of range", func() { _ = make(T, 0, uint64(n)) })
+}
+
+// Test make+copy panics since the gc compiler optimizes these
+// to runtime.makeslicecopy calls.
+func testMakeCopyInts(n uint64) {
+	type T []int
+	var c = make(T, 8)
+	shouldPanic("len out of range", func() { x := make(T, int(n)); copy(x, c) })
+	shouldPanic("cap out of range", func() { x := make(T, 0, int(n)); copy(x, c) })
+	shouldPanic("len out of range", func() { x := make(T, uint(n)); copy(x, c) })
+	shouldPanic("cap out of range", func() { x := make(T, 0, uint(n)); copy(x, c) })
+	shouldPanic("len out of range", func() { x := make(T, int64(n)); copy(x, c) })
+	shouldPanic("cap out of range", func() { x := make(T, 0, int64(n)); copy(x, c) })
+	shouldPanic("len out of range", func() { x := make(T, uint64(n)); copy(x, c) })
+	shouldPanic("cap out of range", func() { x := make(T, 0, uint64(n)); copy(x, c) })
+}
+
+func testMakeCopyBytes(n uint64) {
+	type T []byte
+	var c = make(T, 8)
+	shouldPanic("len out of range", func() { x := make(T, int(n)); copy(x, c) })
+	shouldPanic("cap out of range", func() { x := make(T, 0, int(n)); copy(x, c) })
+	shouldPanic("len out of range", func() { x := make(T, uint(n)); copy(x, c) })
+	shouldPanic("cap out of range", func() { x := make(T, 0, uint(n)); copy(x, c) })
+	shouldPanic("len out of range", func() { x := make(T, int64(n)); copy(x, c) })
+	shouldPanic("cap out of range", func() { x := make(T, 0, int64(n)); copy(x, c) })
+	shouldPanic("len out of range", func() { x := make(T, uint64(n)); copy(x, c) })
+	shouldPanic("cap out of range", func() { x := make(T, 0, uint64(n)); copy(x, c) })
+}
+
+// Test make in append panics for int slices since the gc compiler optimizes makes in appends.
+func testMakeInAppendInts(n uint64) {
+	type T []int
+	for _, length := range []int{0, 1} {
+		t := make(T, length)
+		shouldPanic("len out of range", func() { _ = append(t, make(T, int(n))...) })
+		shouldPanic("cap out of range", func() { _ = append(t, make(T, 0, int(n))...) })
+		shouldPanic("len out of range", func() { _ = append(t, make(T, int64(n))...) })
+		shouldPanic("cap out of range", func() { _ = append(t, make(T, 0, int64(n))...) })
+		shouldPanic("len out of range", func() { _ = append(t, make(T, uint64(n))...) })
+		shouldPanic("cap out of range", func() { _ = append(t, make(T, 0, uint64(n))...) })
+		shouldPanic("len out of range", func() { _ = append(t, make(T, int(n))...) })
+		shouldPanic("cap out of range", func() { _ = append(t, make(T, 0, int(n))...) })
+		shouldPanic("len out of range", func() { _ = append(t, make(T, uint(n))...) })
+		shouldPanic("cap out of range", func() { _ = append(t, make(T, 0, uint(n))...) })
+	}
+}
+
+func testMakeInAppendBytes(n uint64) {
+	type T []byte
+	for _, length := range []int{0, 1} {
+		t := make(T, length)
+		shouldPanic("len out of range", func() { _ = append(t, make(T, int(n))...) })
+		shouldPanic("cap out of range", func() { _ = append(t, make(T, 0, int(n))...) })
+		shouldPanic("len out of range", func() { _ = append(t, make(T, uint(n))...) })
+		shouldPanic("cap out of range", func() { _ = append(t, make(T, 0, uint(n))...) })
+		shouldPanic("len out of range", func() { _ = append(t, make(T, int64(n))...) })
+		shouldPanic("cap out of range", func() { _ = append(t, make(T, 0, int64(n))...) })
+		shouldPanic("len out of range", func() { _ = append(t, make(T, uint64(n))...) })
+		shouldPanic("cap out of range", func() { _ = append(t, make(T, 0, uint64(n))...) })
+	}
+}