66736880ca
Add TSAN acquire/release calls to runtime/cgo to match the ones generated by cgo. This avoids a false positive race around the malloc memory used in runtime/cgo when other goroutines are simultaneously calling malloc and free from cgo. These new calls will only be used when building with CGO_CFLAGS and CGO_LDFLAGS set to -fsanitize=thread, which becomes a requirement to avoid all false positives when using TSAN. These are needed not just for runtime/cgo, but also for any runtime package that uses cgo (such as net and os/user). Add an unused attribute to the _cgo_tsan_acquire and _cgo_tsan_release functions, in case there are no actual cgo function calls. Add a test that checks that setting CGO_CFLAGS/CGO_LDFLAGS avoids a false positive report when using os/user. Change-Id: I0905c644ff7f003b6718aac782393fa219514c48 Reviewed-on: https://go-review.googlesource.com/23492 Run-TryBot: Ian Lance Taylor <iant@golang.org> TryBot-Result: Gobot Gobot <gobot@golang.org> Reviewed-by: Dmitry Vyukov <dvyukov@google.com> |
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The Go Programming Language
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Binary Distribution Notes
If you have just untarred a binary Go distribution, you need to set the environment variable $GOROOT to the full path of the go directory (the one containing this file). You can omit the variable if you unpack it into /usr/local/go, or if you rebuild from sources by running all.bash (see doc/install-source.html). You should also add the Go binary directory $GOROOT/bin to your shell's path.
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