diff options
Diffstat (limited to 'src/runtime/select.go')
| -rw-r--r-- | src/runtime/select.go | 11 |
1 files changed, 9 insertions, 2 deletions
diff --git a/src/runtime/select.go b/src/runtime/select.go index 4e87dba3e7..ddc3d81638 100644 --- a/src/runtime/select.go +++ b/src/runtime/select.go @@ -208,8 +208,15 @@ func block() { gopark(nil, nil, "select (no cases)", traceEvGoStop, 1) // forever } -// overwrites return pc on stack to signal which case of the select -// to run, so cannot appear at the top of a split stack. +// selectgo implements the select statement. +// +// *sel is on the current goroutine's stack (regardless of any +// escaping in selectgo). +// +// selectgo does not return. Instead, it overwrites its return PC and +// returns directly to the triggered select case. Because of this, it +// cannot appear at the top of a split stack. +// //go:nosplit func selectgo(sel *hselect) { pc, offset := selectgoImpl(sel) |