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| author | Ian Lance Taylor <iant@golang.org> | 2025-11-25 22:44:11 -0800 |
|---|---|---|
| committer | Gopher Robot <gobot@golang.org> | 2026-01-27 13:47:14 -0800 |
| commit | 481ab86aafe0cac177df793c9946c5ef2126137c (patch) | |
| tree | dbe3504b8dae8baaf51c933b57b62503db98d356 /src/cmd/compile/internal | |
| parent | 251f3aa6ee6fc3925fe8e64cd4b403bfa73b93ab (diff) | |
| download | go-481ab86aafe0cac177df793c9946c5ef2126137c.tar.xz | |
cmd/link, runtime: remove typelinks
Instead of adding a typelinks section to a Go binary,
mark the start and end of the typelinked type descriptors.
The runtime can then step through the descriptors to find them all,
rather than relying on the extra linker-generated offset list.
The runtime steps through the type descriptors lazily,
as many Go programs don't need the typelinks list at all.
This reduces the size of cmd/go by 15K bytes, which isn't much
but it's not nothing.
A future CL will change the reflect package to use the type pointers
directly rather than converting to offsets and then back to type pointers.
For #6853
Change-Id: Id0af4ce81c5b1cea899fc92b6ff9d2db8ce4c267
Reviewed-on: https://go-review.googlesource.com/c/go/+/724261
Reviewed-by: Dmitri Shuralyov <dmitshur@google.com>
Reviewed-by: Keith Randall <khr@google.com>
Reviewed-by: Keith Randall <khr@golang.org>
LUCI-TryBot-Result: Go LUCI <golang-scoped@luci-project-accounts.iam.gserviceaccount.com>
Auto-Submit: Ian Lance Taylor <iant@golang.org>
Diffstat (limited to 'src/cmd/compile/internal')
| -rw-r--r-- | src/cmd/compile/internal/reflectdata/reflect.go | 3 |
1 files changed, 3 insertions, 0 deletions
diff --git a/src/cmd/compile/internal/reflectdata/reflect.go b/src/cmd/compile/internal/reflectdata/reflect.go index 324007ea79..8a2b15ab24 100644 --- a/src/cmd/compile/internal/reflectdata/reflect.go +++ b/src/cmd/compile/internal/reflectdata/reflect.go @@ -756,6 +756,9 @@ func writeType(t *types.Type) *obj.LSym { // | method list, if any | dextratype // +--------------------------------+ - E + // runtime.moduleTypelinks is aware of this type layout, + // and must be changed if the layout change. + // UncommonType section is included if we have a name or a method. extra := t.Sym() != nil || len(methods(t)) != 0 |