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| author | Ian Lance Taylor <iant@golang.org> | 2017-05-25 12:20:58 -0700 |
|---|---|---|
| committer | Ian Lance Taylor <iant@golang.org> | 2017-05-26 05:22:39 +0000 |
| commit | 6654e3e0a1fa1deff4acf7d5ea68cd078df7e2fa (patch) | |
| tree | d7e80c6dd9388aa716cb6fe71b4ce6dc576eb8c8 /src/runtime | |
| parent | ffab6ab87773e0d8c50f64a29555b0d529c1d43a (diff) | |
| download | go-git-6654e3e0a1fa1deff4acf7d5ea68cd078df7e2fa.tar.gz | |
cmd/cgo, runtime/cgo: add docs for TSAN interaction
Change-Id: I3b3ae4ecad0894781a3019326c7262cb9790ad4d
Reviewed-on: https://go-review.googlesource.com/44250
Reviewed-by: Bryan Mills <bcmills@google.com>
Reviewed-by: Dmitry Vyukov <dvyukov@google.com>
Diffstat (limited to 'src/runtime')
| -rw-r--r-- | src/runtime/cgo/libcgo.h | 5 |
1 files changed, 5 insertions, 0 deletions
diff --git a/src/runtime/cgo/libcgo.h b/src/runtime/cgo/libcgo.h index 01f9e72174..2b8b4e25a2 100644 --- a/src/runtime/cgo/libcgo.h +++ b/src/runtime/cgo/libcgo.h @@ -111,6 +111,11 @@ extern void (*(_cgo_get_context_function(void)))(struct context_arg*); #ifdef CGO_TSAN // These must match the definitions in yesTsanProlog in cmd/cgo/out.go. +// In general we should call _cgo_tsan_acquire when we enter C code, +// and call _cgo_tsan_release when we return to Go code. +// This is only necessary when calling code that might be instrumented +// by TSAN, which mostly means system library calls that TSAN intercepts. +// See the comment in cmd/cgo/out.go for more details. long long _cgo_sync __attribute__ ((common)); |