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| author | Austin Clements <austin@google.com> | 2017-07-11 11:03:36 -0400 |
|---|---|---|
| committer | Austin Clements <austin@google.com> | 2017-07-11 18:32:38 +0000 |
| commit | fea7c43ea238d8e18f3bafaac2740b3fa8975ae5 (patch) | |
| tree | 91e5ba1461cbf8f8d70f9efe46caf02fad2d20e6 /src/sync/atomic | |
| parent | 58ae050055ef00b97f1119e042fe7b459b20e839 (diff) | |
| download | go-fea7c43ea238d8e18f3bafaac2740b3fa8975ae5.tar.xz | |
sync/atomic: clarify 64-bit alignment bug
Local variables can also be relied on the be 64-bit aligned, since
they will be escaped to the heap if used with any atomic operations.
Also, allocated arrays are also aligned, just like structs and slices.
Fixes #18955.
Change-Id: I8a1897f6ff78922c8bfcf20d6eb4bcb17a70ba2d
Reviewed-on: https://go-review.googlesource.com/48112
Reviewed-by: Brad Fitzpatrick <bradfitz@golang.org>
Diffstat (limited to 'src/sync/atomic')
| -rw-r--r-- | src/sync/atomic/doc.go | 4 |
1 files changed, 2 insertions, 2 deletions
diff --git a/src/sync/atomic/doc.go b/src/sync/atomic/doc.go index 302ff43070..7c007d7a15 100644 --- a/src/sync/atomic/doc.go +++ b/src/sync/atomic/doc.go @@ -48,8 +48,8 @@ import ( // On non-Linux ARM, the 64-bit functions use instructions unavailable before the ARMv6k core. // // On both ARM and x86-32, it is the caller's responsibility to arrange for 64-bit -// alignment of 64-bit words accessed atomically. The first word in a global -// variable or in an allocated struct or slice can be relied upon to be +// alignment of 64-bit words accessed atomically. The first word in a +// variable or in an allocated struct, array, or slice can be relied upon to be // 64-bit aligned. // SwapInt32 atomically stores new into *addr and returns the previous *addr value. |