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| author | Ian Lance Taylor <iant@golang.org> | 2017-08-04 10:36:40 -0700 |
|---|---|---|
| committer | Ian Lance Taylor <iant@golang.org> | 2017-08-05 18:05:41 +0000 |
| commit | f096b5b340f6e831cf80cd39cbf88d4656d232fa (patch) | |
| tree | 1814c48b303450276e9b843f5f29e6a880b0c20e /src/runtime/symtab.go | |
| parent | 3e3da5463302ff6f73a78e60fa7027d554095520 (diff) | |
| download | go-f096b5b340f6e831cf80cd39cbf88d4656d232fa.tar.gz go-f096b5b340f6e831cf80cd39cbf88d4656d232fa.zip | |
runtime: mark activeModules nosplit/nowritebarrier
The activeModules function is called by the cgo pointer checking code,
which is called by the write barrier (when GODEBUG=cgocheck=2), and as
such must be nosplit/nowritebarrier.
Fixes #21306
Change-Id: I57f2124f14de7f3872b2de9532abab15df95d45a
Reviewed-on: https://go-review.googlesource.com/53352
Reviewed-by: Austin Clements <austin@google.com>
Diffstat (limited to 'src/runtime/symtab.go')
| -rw-r--r-- | src/runtime/symtab.go | 5 |
1 files changed, 5 insertions, 0 deletions
diff --git a/src/runtime/symtab.go b/src/runtime/symtab.go index 8e410c4560..e1b41ca4ff 100644 --- a/src/runtime/symtab.go +++ b/src/runtime/symtab.go @@ -409,6 +409,11 @@ var modulesSlice unsafe.Pointer // see activeModules // // A module is active once its gcdatamask and gcbssmask have been // assembled and it is usable by the GC. +// +// This is nosplit/nowritebarrier because it is called by the +// cgo pointer checking code. +//go:nosplit +//go:nowritebarrier func activeModules() []*moduledata { p := (*[]*moduledata)(atomic.Loadp(unsafe.Pointer(&modulesSlice))) if p == nil { |