diff options
| author | Michael Pratt <mpratt@google.com> | 2021-07-30 13:39:18 -0700 |
|---|---|---|
| committer | gVisor bot <gvisor-bot@google.com> | 2021-07-30 13:42:15 -0700 |
| commit | 62ea5c0a2212b9827f093551fc3da166facb9f0b (patch) | |
| tree | e26283ab57a11a34202cc731da4270c53c418951 /tools/nogo/analyzers.go | |
| parent | 095b0d8348531b96f1b40885c00d6cd7f07ecf80 (diff) | |
checklinkname: rudimentary type-checking of linkname directives
This CL introduces a 'checklinkname' analyzer, which provides rudimentary
type-checking that verifies that function signatures on the local and remote
sides of //go:linkname directives match expected values.
If the Go standard library changes the definitions of any of these function,
checklinkname will flag the change as a finding, providing an error informing
the gVisor team to adapt to the upstream changes. This allows us to eliminate
the majority of gVisor's forward-looking negative build tags, as we can catch
mismatches in testing [1].
The remaining forward-looking negative build tags are covering shared struct
definitions, which I hope to add to checklinkname in a future CL.
[1] Of course, semantics/requirements can change without the signature
changing, so we still must be careful, but this covers the common case.
PiperOrigin-RevId: 387873847
Diffstat (limited to 'tools/nogo/analyzers.go')
| -rw-r--r-- | tools/nogo/analyzers.go | 2 |
1 files changed, 2 insertions, 0 deletions
diff --git a/tools/nogo/analyzers.go b/tools/nogo/analyzers.go index 2b3c03fec..6705fc905 100644 --- a/tools/nogo/analyzers.go +++ b/tools/nogo/analyzers.go @@ -47,6 +47,7 @@ import ( "honnef.co/go/tools/stylecheck" "gvisor.dev/gvisor/tools/checkescape" + "gvisor.dev/gvisor/tools/checklinkname" "gvisor.dev/gvisor/tools/checklocks" "gvisor.dev/gvisor/tools/checkunsafe" ) @@ -80,6 +81,7 @@ var AllAnalyzers = []*analysis.Analyzer{ unusedresult.Analyzer, checkescape.Analyzer, checkunsafe.Analyzer, + checklinkname.Analyzer, checklocks.Analyzer, } |