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217a47bdb4
Backport from go-1.19. The godebug package is needed by the fix to CVE-2022-41725. Mostly a cherry-pick but exceptions are noted in comments marked "backport". (From OE-Core rev: e5cf04f55b4849ae6db1253b39ad8b037cf01af4) Signed-off-by: Joe Slater <joe.slater@windriver.com> Signed-off-by: Steve Sakoman <steve@sakoman.com>
85 lines
2.0 KiB
Diff
85 lines
2.0 KiB
Diff
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Upstream-Status: Backport [see text]
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https://github.com/golong/go.git as of commit 22c1d18a27...
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Copy src/internal/godebug from go 1.19 since it does not
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exist in 1.17.
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Signed-off-by: Joe Slater <joe.slater@windriver.com>
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---
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--- /dev/null
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+++ go/src/internal/godebug/godebug.go
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@@ -0,0 +1,34 @@
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+// Copyright 2021 The Go Authors. All rights reserved.
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+// Use of this source code is governed by a BSD-style
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+// license that can be found in the LICENSE file.
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+
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+// Package godebug parses the GODEBUG environment variable.
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+package godebug
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+
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+import "os"
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+
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+// Get returns the value for the provided GODEBUG key.
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+func Get(key string) string {
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+ return get(os.Getenv("GODEBUG"), key)
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+}
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+
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+// get returns the value part of key=value in s (a GODEBUG value).
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+func get(s, key string) string {
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+ for i := 0; i < len(s)-len(key)-1; i++ {
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+ if i > 0 && s[i-1] != ',' {
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+ continue
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+ }
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+ afterKey := s[i+len(key):]
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+ if afterKey[0] != '=' || s[i:i+len(key)] != key {
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+ continue
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+ }
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+ val := afterKey[1:]
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+ for i, b := range val {
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+ if b == ',' {
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+ return val[:i]
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+ }
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+ }
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+ return val
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+ }
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+ return ""
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+}
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--- /dev/null
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+++ go/src/internal/godebug/godebug_test.go
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@@ -0,0 +1,34 @@
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+// Copyright 2021 The Go Authors. All rights reserved.
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+// Use of this source code is governed by a BSD-style
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+// license that can be found in the LICENSE file.
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+
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+package godebug
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+
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+import "testing"
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+
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+func TestGet(t *testing.T) {
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+ tests := []struct {
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+ godebug string
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+ key string
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+ want string
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+ }{
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+ {"", "", ""},
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+ {"", "foo", ""},
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+ {"foo=bar", "foo", "bar"},
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+ {"foo=bar,after=x", "foo", "bar"},
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+ {"before=x,foo=bar,after=x", "foo", "bar"},
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+ {"before=x,foo=bar", "foo", "bar"},
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+ {",,,foo=bar,,,", "foo", "bar"},
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+ {"foodecoy=wrong,foo=bar", "foo", "bar"},
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+ {"foo=", "foo", ""},
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+ {"foo", "foo", ""},
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+ {",foo", "foo", ""},
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+ {"foo=bar,baz", "loooooooong", ""},
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+ }
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+ for _, tt := range tests {
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+ got := get(tt.godebug, tt.key)
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+ if got != tt.want {
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+ t.Errorf("get(%q, %q) = %q; want %q", tt.godebug, tt.key, got, tt.want)
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+ }
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+ }
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+}
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