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| author | Cherry Mui <cherryyz@google.com> | 2025-11-25 13:54:18 -0500 |
|---|---|---|
| committer | Cherry Mui <cherryyz@google.com> | 2026-04-01 11:00:13 -0700 |
| commit | 46755cb4dea406093296ead4250ff5f7091c04a2 (patch) | |
| tree | 4558617545a2c0b2dc924d2f95c15655ccb74ee3 /src/runtime | |
| parent | 8ea160279ff6700282f254d6b74fb02f8a316abe (diff) | |
| download | go-46755cb4dea406093296ead4250ff5f7091c04a2.tar.xz | |
cmd/compile, cmd/link: add linknamestd directive for std-only linknames
In the standard library, there are a number of linknames, for
sharing symbols within the standard library. They are not supposed
to be accessed externally. But currently there is no good
mechanism to prevent that. In the linker we have a blocklist of
linknames, which forbids linkname references other than explicitly
allowed packages. The blocklist is manually maintained, requiring
periodic manual update.
To move away from that manually maintained blocklist, this CL
introduces a new directive, linknamestd, that marks a linkname
for use within the standard library only. The linker will allow
references within the standard library and forbid others.
For a proof of concept, runtime.coroswitch is removed from the
blocklist, and replaced with linknamestd. An external reference to
it is still disallowed by the linker, as tested with
cmd/link.TestCheckLinkname with testdata/linkname/coro.go.
Change-Id: I0d0f8746b8835d8cdcfc3ff835d22a551da5f038
Reviewed-on: https://go-review.googlesource.com/c/go/+/749942
LUCI-TryBot-Result: Go LUCI <golang-scoped@luci-project-accounts.iam.gserviceaccount.com>
Reviewed-by: David Chase <drchase@google.com>
Diffstat (limited to 'src/runtime')
| -rw-r--r-- | src/runtime/coro.go | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/src/runtime/coro.go b/src/runtime/coro.go index 40d4e47fbe..72c58b7964 100644 --- a/src/runtime/coro.go +++ b/src/runtime/coro.go @@ -84,7 +84,7 @@ func coroexit(c *coro) { mcall(coroswitch_m) } -//go:linkname coroswitch +//go:linknamestd coroswitch // coroswitch switches to the goroutine blocked on c // and then blocks the current goroutine on c. |