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go/misc
Ian Lance Taylor 66736880ca runtime/cgo: add TSAN acquire/release calls
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>
2016-05-31 20:53:16 +00:00
..
android all: make copyright headers consistent with one space after period 2016-05-02 13:43:18 +00:00
arm all: make copyright headers consistent with one space after period 2016-05-02 13:43:18 +00:00
cgo runtime/cgo: add TSAN acquire/release calls 2016-05-31 20:53:16 +00:00
chrome/gophertool all: link to https instead of http 2015-07-11 14:36:33 +00:00
git misc/git: Fix non-literal period in pre-commit grep 2016-02-26 19:06:38 +00:00
ios misc/ios: fix exec wrapper locking 2016-03-25 16:47:01 +00:00
linkcheck
nacl cmd/vendor: move cmd/internal/unvendor packages to cmd/vendor 2016-05-14 17:21:52 +00:00
sortac misc/sortac: add tool to sort the AUTHORS and CONTRIBUTORS files 2015-11-12 17:07:09 +00:00
swig all: make copyright headers consistent with one space after period 2016-05-02 13:43:18 +00:00
trace misc/trace: update trace viewer html 2016-04-14 14:48:04 +00:00
benchcmp
editors