1 files changed, 177 insertions, 0 deletions
diff --git a/test/escape_slice.go b/test/escape_slice.go
new file mode 100644
index 0000000..055b60b
--- /dev/null
+++ b/test/escape_slice.go
@@ -0,0 +1,177 @@
+// errorcheck -0 -m -l
+
+// Copyright 2015 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 escape analysis for slices.
+
+package escape
+
+import (
+	"os"
+	"strings"
+)
+
+var sink interface{}
+
+func slice0() {
+	var s []*int
+	// BAD: i should not escape
+	i := 0 // ERROR "moved to heap: i"
+	s = append(s, &i)
+	_ = s
+}
+
+func slice1() *int {
+	var s []*int
+	i := 0 // ERROR "moved to heap: i"
+	s = append(s, &i)
+	return s[0]
+}
+
+func slice2() []*int {
+	var s []*int
+	i := 0 // ERROR "moved to heap: i"
+	s = append(s, &i)
+	return s
+}
+
+func slice3() *int {
+	var s []*int
+	i := 0 // ERROR "moved to heap: i"
+	s = append(s, &i)
+	for _, p := range s {
+		return p
+	}
+	return nil
+}
+
+func slice4(s []*int) { // ERROR "s does not escape"
+	i := 0 // ERROR "moved to heap: i"
+	s[0] = &i
+}
+
+func slice5(s []*int) { // ERROR "s does not escape"
+	if s != nil {
+		s = make([]*int, 10) // ERROR "make\(\[\]\*int, 10\) does not escape"
+	}
+	i := 0 // ERROR "moved to heap: i"
+	s[0] = &i
+}
+
+func slice6() {
+	s := make([]*int, 10) // ERROR "make\(\[\]\*int, 10\) does not escape"
+	// BAD: i should not escape
+	i := 0 // ERROR "moved to heap: i"
+	s[0] = &i
+	_ = s
+}
+
+func slice7() *int {
+	s := make([]*int, 10) // ERROR "make\(\[\]\*int, 10\) does not escape"
+	i := 0                // ERROR "moved to heap: i"
+	s[0] = &i
+	return s[0]
+}
+
+func slice8() {
+	i := 0
+	s := []*int{&i} // ERROR "\[\]\*int{...} does not escape"
+	_ = s
+}
+
+func slice9() *int {
+	i := 0          // ERROR "moved to heap: i"
+	s := []*int{&i} // ERROR "\[\]\*int{...} does not escape"
+	return s[0]
+}
+
+func slice10() []*int {
+	i := 0          // ERROR "moved to heap: i"
+	s := []*int{&i} // ERROR "\[\]\*int{...} escapes to heap"
+	return s
+}
+
+func slice11() {
+	i := 2
+	s := make([]int, 2, 3) // ERROR "make\(\[\]int, 2, 3\) does not escape"
+	s = make([]int, i, 3)  // ERROR "make\(\[\]int, i, 3\) does not escape"
+	s = make([]int, i, 1)  // ERROR "make\(\[\]int, i, 1\) does not escape"
+	_ = s
+}
+
+func slice12(x []int) *[1]int { // ERROR "leaking param: x to result ~r0 level=0$"
+	return (*[1]int)(x)
+}
+
+func envForDir(dir string) []string { // ERROR "dir does not escape"
+	env := os.Environ()
+	return mergeEnvLists([]string{"PWD=" + dir}, env) // ERROR ".PWD=. \+ dir escapes to heap" "\[\]string{...} does not escape"
+}
+
+func mergeEnvLists(in, out []string) []string { // ERROR "leaking param content: in" "leaking param content: out" "leaking param: out to result ~r0 level=0"
+NextVar:
+	for _, inkv := range in {
+		k := strings.SplitAfterN(inkv, "=", 2)[0]
+		for i, outkv := range out {
+			if strings.HasPrefix(outkv, k) {
+				out[i] = inkv
+				continue NextVar
+			}
+		}
+		out = append(out, inkv)
+	}
+	return out
+}
+
+const (
+	IPv4len = 4
+	IPv6len = 16
+)
+
+var v4InV6Prefix = []byte{0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0xff, 0xff}
+
+func IPv4(a, b, c, d byte) IP {
+	p := make(IP, IPv6len) // ERROR "make\(IP, IPv6len\) escapes to heap"
+	copy(p, v4InV6Prefix)
+	p[12] = a
+	p[13] = b
+	p[14] = c
+	p[15] = d
+	return p
+}
+
+type IP []byte
+
+type IPAddr struct {
+	IP   IP
+	Zone string // IPv6 scoped addressing zone
+}
+
+type resolveIPAddrTest struct {
+	network       string
+	litAddrOrName string
+	addr          *IPAddr
+	err           error
+}
+
+var resolveIPAddrTests = []resolveIPAddrTest{
+	{"ip", "127.0.0.1", &IPAddr{IP: IPv4(127, 0, 0, 1)}, nil},
+	{"ip4", "127.0.0.1", &IPAddr{IP: IPv4(127, 0, 0, 1)}, nil},
+	{"ip4:icmp", "127.0.0.1", &IPAddr{IP: IPv4(127, 0, 0, 1)}, nil},
+}
+
+func setupTestData() {
+	resolveIPAddrTests = append(resolveIPAddrTests,
+		[]resolveIPAddrTest{ // ERROR "\[\]resolveIPAddrTest{...} does not escape"
+			{"ip",
+				"localhost",
+				&IPAddr{IP: IPv4(127, 0, 0, 1)}, // ERROR "&IPAddr{...} escapes to heap"
+				nil},
+			{"ip4",
+				"localhost",
+				&IPAddr{IP: IPv4(127, 0, 0, 1)}, // ERROR "&IPAddr{...} escapes to heap"
+				nil},
+		}...)
+}