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| author | Gerrit Code Review <noreply-gerritcodereview@google.com> | 2021-08-12 20:22:27 +0000 |
|---|---|---|
| committer | Gerrit Code Review <noreply-gerritcodereview@google.com> | 2021-08-12 20:22:27 +0000 |
| commit | 4d3cc84774549d26e52cbba3a0ffc50d3ede80d5 (patch) | |
| tree | de3466e3b835e2c18fa03548ddf0619f5555575b /src/runtime/mfinal.go | |
| parent | 7e9f911ec4fd08ce9b4296f0aea4864b53064573 (diff) | |
| parent | a64ab8d3ecb38e10007e136edc9dc3abde873e1e (diff) | |
| download | go-4d3cc84774549d26e52cbba3a0ffc50d3ede80d5.tar.gz go-4d3cc84774549d26e52cbba3a0ffc50d3ede80d5.zip | |
Merge "[dev.typeparams] all: merge master (46fd547) into dev.typeparams" into dev.typeparamsdev.typeparams
Diffstat (limited to 'src/runtime/mfinal.go')
| -rw-r--r-- | src/runtime/mfinal.go | 4 |
1 files changed, 4 insertions, 0 deletions
diff --git a/src/runtime/mfinal.go b/src/runtime/mfinal.go index c07ea5e375..3cdb81e2fb 100644 --- a/src/runtime/mfinal.go +++ b/src/runtime/mfinal.go @@ -466,6 +466,10 @@ okarg: // Without the KeepAlive call, the finalizer could run at the start of // syscall.Read, closing the file descriptor before syscall.Read makes // the actual system call. +// +// Note: KeepAlive should only be used to prevent finalizers from +// running prematurely. In particular, when used with unsafe.Pointer, +// the rules for valid uses of unsafe.Pointer still apply. func KeepAlive(x interface{}) { // Introduce a use of x that the compiler can't eliminate. // This makes sure x is alive on entry. We need x to be alive |