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Merge pull request #134 from jlauinger/fix-unsafe-slice-cast

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Fix possible memory confusion in unsafe slice cast
This commit is contained in:
Yusuke Inuzuka 2020-06-04 00:26:44 +09:00 committed by GitHub
commit 6eb3819f4b
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1 changed files with 6 additions and 3 deletions
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9
util/util_unsafe.go
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@ -13,8 +13,11 @@ func BytesToReadOnlyString(b []byte) string {
}
// StringToReadOnlyBytes returns bytes converted from given string.
func StringToReadOnlyBytes(s string) []byte {
func StringToReadOnlyBytes(s string) (bs []byte) {
sh := (*reflect.StringHeader)(unsafe.Pointer(&s))
bh := reflect.SliceHeader{Data: sh.Data, Len: sh.Len, Cap: sh.Len}
return *(*[]byte)(unsafe.Pointer(&bh))
bh := (*reflect.SliceHeader)(unsafe.Pointer(&bs))
bh.Data = sh.Data
bh.Cap = sh.Len
bh.Len = sh.Len
return
}