cmd/compile: add -msan option
The -msan option causes the compiler to add instrumentation for the
C/C++ memory sanitizer. Every memory read/write will be preceded by
a call to msanread/msanwrite.
This CL passes tests but is not usable by itself. The actual
implementation of msanread/msanwrite in the runtime package, and support
for -msan in the go tool and the linker, and tests, will follow in
subsequent CLs.
Change-Id: I3d517fb3e6e65d9bf9433db070a420fd11f57816
Reviewed-on: https://go-review.googlesource.com/16160
Reviewed-by: David Crawshaw <crawshaw@golang.org>
diff --git a/src/cmd/compile/internal/gc/go.go b/src/cmd/compile/internal/gc/go.go
index 79b9d9f..c1899ef 100644
--- a/src/cmd/compile/internal/gc/go.go
+++ b/src/cmd/compile/internal/gc/go.go
@@ -511,6 +511,8 @@
var racepkg *Pkg // package runtime/race
+var msanpkg *Pkg // package runtime/msan
+
var typepkg *Pkg // fake package for runtime type info (headers)
var typelinkpkg *Pkg // fake package for runtime type info (data)
@@ -645,6 +647,8 @@
var flag_race int
+var flag_msan int
+
var flag_largemodel int
// Whether we are adding any sort of code instrumentation, such as
