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\u0026\u0026 git checkout FETCH_HEAD","Cherry Pick":"git fetch https://review.couchbase.org/ep-engine refs/changes/29/55829/1 \u0026\u0026 git cherry-pick FETCH_HEAD","Format Patch":"git fetch https://review.couchbase.org/ep-engine refs/changes/29/55829/1 \u0026\u0026 git format-patch -1 --stdout FETCH_HEAD","Pull":"git pull https://review.couchbase.org/ep-engine refs/changes/29/55829/1","Reset To":"git fetch https://review.couchbase.org/ep-engine refs/changes/29/55829/1 \u0026\u0026 git reset --hard FETCH_HEAD"}}},"commit":{"parents":[{"commit":"66cda463a43bae71a5aa982383fd1646dec78b15","subject":"Change GlobalTask::taskable from ptr to reference"}],"author":{"name":"Dave Rigby","email":"daver@couchbase.com","date":"2015-10-06 14:29:34.000000000","tz":0},"committer":{"name":"Dave Rigby","email":"daver@couchbase.com","date":"2015-10-06 15:57:37.000000000","tz":0},"subject":"Fix race in void ExecutorPool::doWorkerStat","message":"Fix race in void ExecutorPool::doWorkerStat\n\nAs reported by ThreadSanitizer (see below), there is a race between\nsetting the current task associated with a ExecutorThread and reading\nthe name of that thread.\n\nUnfortunately there doesn\u0027t seem to be a straightforward way to solve\nthis without adding a new mutex; currentTask (the variable the race is\non) is a SingleThreadedRCPtr, which is non-trivial to make thread-safe\n(i.e. atomic). I did consider changing currenTask (and all other\nExTask variables) to be a std::shared_ptr as in C++11 this has support\nfor updating atomically, however the support in mainstream compilers\napparently isn\u0027t quite there yet.\n\nTherefore I\u0027ve just added a mutex to guard currentTask.\n\nThreadSanitizer report:\n\nWARNING: ThreadSanitizer: data race (pid\u003d27332)\n  Read of size 8 at 0x7d340000c8f0 by main thread (mutexes: write M19366):\n    #0 ExecutorThread::getTaskableName() const /home/couchbase/couchbase/ep-engine/src/atomic.h:309 (ep.so+0x0000000e6178)\n    #1 EventuallyPersistentEngine::getStats(void const*, char const*, int, void (*)(char const*, unsigned short, char const*, unsigned int, void const*)) /home/couchbase/couchbase/ep-engine/src/ep_engine.cc:4346 (ep.so+0x0000000bc4dd)\n    #2 EvpGetStats(engine_interface*, void const*, char const*, int, void (*)(char const*, unsigned short, char const*, unsigned int, void const*)) /home/couchbase/couchbase/ep-engine/src/ep_engine.cc:213 (ep.so+0x0000000ab49e)\n    #3 mock_get_stats(engine_interface*, void const*, char const*, int, void (*)(char const*, unsigned short, char const*, unsigned int, void const*)) /home/couchbase/couchbase/memcached/programs/engine_testapp/engine_testapp.cc:239 (engine_testapp+0x0000004c54ad)\n    #4 test_worker_stats(engine_interface*, engine_interface_v1*) /home/couchbase/couchbase/ep-engine/tests/ep_testsuite.cc:8901 (ep_testsuite.so+0x000000039768)\n    #5 execute_test(test, char const*, char const*) /home/couchbase/couchbase/memcached/programs/engine_testapp/engine_testapp.cc:1090 (engine_testapp+0x0000004c40b2)\n    #6 __libc_start_main /build/buildd/eglibc-2.15/csu/libc-start.c:226 (libc.so.6+0x00000002176c)\n\n  Previous write of size 8 at 0x7d340000c8f0 by thread T5:\n    #0 ExecutorThread::run() /home/couchbase/couchbase/ep-engine/src/atomic.h:322 (ep.so+0x0000000e9906)\n    #1 launch_executor_thread(void*) /home/couchbase/couchbase/ep-engine/src/executorthread.cc:33 (ep.so+0x0000000e9795)\n    #2 platform_thread_wrap /home/couchbase/.ccache/tmp/cb_pthread.tmp.00b591814417.18511.i (libplatform.so.0.1.0+0x000000003d91)\n\nChange-Id: Id02f7a98b40b952a415cf9027a8f2243af38fc4d\n"},"parents_data":[{"branch_name":"refs/heads/master","commit_id":"66cda463a43bae71a5aa982383fd1646dec78b15","is_merged_in_target_branch":false,"change_id":"I37299b171329c0c5b176026a167d22faefcf6270","change_number":55828,"patch_set_number":1,"change_status":"MERGED"}],"branch":"refs/heads/master"},"aa725055d2c778bdb246696fc6532a6b8b5a4660":{"kind":"TRIVIAL_REBASE","_number":2,"created":"2015-10-07 11:46:36.000000000","uploader":{"_account_id":1000966,"name":"Dave Rigby","email":"daver@couchbase.com","username":"drigby","avatars":[{"url":"https://www.gravatar.com/avatar/514e75a8d75cc1fcdb22433d445ae8f1.jpg?d\u003didenticon\u0026r\u003dpg\u0026s\u003d32","height":32},{"url":"https://www.gravatar.com/avatar/514e75a8d75cc1fcdb22433d445ae8f1.jpg?d\u003didenticon\u0026r\u003dpg\u0026s\u003d56","height":56},{"url":"https://www.gravatar.com/avatar/514e75a8d75cc1fcdb22433d445ae8f1.jpg?d\u003didenticon\u0026r\u003dpg\u0026s\u003d100","height":100},{"url":"https://www.gravatar.com/avatar/514e75a8d75cc1fcdb22433d445ae8f1.jpg?d\u003didenticon\u0026r\u003dpg\u0026s\u003d120","height":120}]},"ref":"refs/changes/29/55829/2","fetch":{"anonymous http":{"url":"https://review.couchbase.org/ep-engine","ref":"refs/changes/29/55829/2","commands":{"Branch":"git fetch https://review.couchbase.org/ep-engine refs/changes/29/55829/2 \u0026\u0026 git checkout -b change-55829 FETCH_HEAD","Checkout":"git fetch https://review.couchbase.org/ep-engine refs/changes/29/55829/2 \u0026\u0026 git checkout FETCH_HEAD","Cherry Pick":"git fetch https://review.couchbase.org/ep-engine refs/changes/29/55829/2 \u0026\u0026 git cherry-pick FETCH_HEAD","Format Patch":"git fetch https://review.couchbase.org/ep-engine refs/changes/29/55829/2 \u0026\u0026 git format-patch -1 --stdout FETCH_HEAD","Pull":"git pull https://review.couchbase.org/ep-engine refs/changes/29/55829/2","Reset To":"git fetch https://review.couchbase.org/ep-engine refs/changes/29/55829/2 \u0026\u0026 git reset --hard FETCH_HEAD"}}},"commit":{"parents":[{"commit":"a518975320f3e3cb0f3270182955eb0e43543bcd","subject":"Make cookie atomic to serialize set/get in ConnHandler"}],"author":{"name":"Dave Rigby","email":"daver@couchbase.com","date":"2015-10-06 14:29:34.000000000","tz":0},"committer":{"name":"Dave Rigby","email":"daver@couchbase.com","date":"2015-10-07 09:56:56.000000000","tz":0},"subject":"Fix race in void ExecutorPool::doWorkerStat","message":"Fix race in void ExecutorPool::doWorkerStat\n\nAs reported by ThreadSanitizer (see below), there is a race between\nsetting the current task associated with a ExecutorThread and reading\nthe name of that thread.\n\nUnfortunately there doesn\u0027t seem to be a straightforward way to solve\nthis without adding a new mutex; currentTask (the variable the race is\non) is a SingleThreadedRCPtr, which is non-trivial to make thread-safe\n(i.e. atomic). I did consider changing currenTask (and all other\nExTask variables) to be a std::shared_ptr as in C++11 this has support\nfor updating atomically, however the support in mainstream compilers\napparently isn\u0027t quite there yet.\n\nTherefore I\u0027ve just added a mutex to guard currentTask.\n\nThreadSanitizer report:\n\nWARNING: ThreadSanitizer: data race (pid\u003d27332)\n  Read of size 8 at 0x7d340000c8f0 by main thread (mutexes: write M19366):\n    #0 ExecutorThread::getTaskableName() const /home/couchbase/couchbase/ep-engine/src/atomic.h:309 (ep.so+0x0000000e6178)\n    #1 EventuallyPersistentEngine::getStats(void const*, char const*, int, void (*)(char const*, unsigned short, char const*, unsigned int, void const*)) /home/couchbase/couchbase/ep-engine/src/ep_engine.cc:4346 (ep.so+0x0000000bc4dd)\n    #2 EvpGetStats(engine_interface*, void const*, char const*, int, void (*)(char const*, unsigned short, char const*, unsigned int, void const*)) /home/couchbase/couchbase/ep-engine/src/ep_engine.cc:213 (ep.so+0x0000000ab49e)\n    #3 mock_get_stats(engine_interface*, void const*, char const*, int, void (*)(char const*, unsigned short, char const*, unsigned int, void const*)) /home/couchbase/couchbase/memcached/programs/engine_testapp/engine_testapp.cc:239 (engine_testapp+0x0000004c54ad)\n    #4 test_worker_stats(engine_interface*, engine_interface_v1*) /home/couchbase/couchbase/ep-engine/tests/ep_testsuite.cc:8901 (ep_testsuite.so+0x000000039768)\n    #5 execute_test(test, char const*, char const*) /home/couchbase/couchbase/memcached/programs/engine_testapp/engine_testapp.cc:1090 (engine_testapp+0x0000004c40b2)\n    #6 __libc_start_main /build/buildd/eglibc-2.15/csu/libc-start.c:226 (libc.so.6+0x00000002176c)\n\n  Previous write of size 8 at 0x7d340000c8f0 by thread T5:\n    #0 ExecutorThread::run() /home/couchbase/couchbase/ep-engine/src/atomic.h:322 (ep.so+0x0000000e9906)\n    #1 launch_executor_thread(void*) /home/couchbase/couchbase/ep-engine/src/executorthread.cc:33 (ep.so+0x0000000e9795)\n    #2 platform_thread_wrap /home/couchbase/.ccache/tmp/cb_pthread.tmp.00b591814417.18511.i (libplatform.so.0.1.0+0x000000003d91)\n\nChange-Id: Id02f7a98b40b952a415cf9027a8f2243af38fc4d\n"},"parents_data":[{"branch_name":"refs/heads/master","commit_id":"a518975320f3e3cb0f3270182955eb0e43543bcd","is_merged_in_target_branch":true,"change_id":"I8a668f17013c95abc9786d853ed2c6462cae5320","change_number":55794,"patch_set_number":7,"change_status":"MERGED"}],"branch":"refs/heads/master"},"052a2cb20a6c7c2d9706803b0d306672031994a0":{"kind":"NO_CODE_CHANGE","_number":3,"created":"2015-10-07 16:52:13.000000000","uploader":{"_account_id":1000097,"name":"Chiyoung Seo","email":"chiyoung@northscale.com","username":"chiyoung","avatars":[{"url":"https://www.gravatar.com/avatar/ec517f4126dd292151b452ce4d1edf31.jpg?d\u003didenticon\u0026r\u003dpg\u0026s\u003d32","height":32},{"url":"https://www.gravatar.com/avatar/ec517f4126dd292151b452ce4d1edf31.jpg?d\u003didenticon\u0026r\u003dpg\u0026s\u003d56","height":56},{"url":"https://www.gravatar.com/avatar/ec517f4126dd292151b452ce4d1edf31.jpg?d\u003didenticon\u0026r\u003dpg\u0026s\u003d100","height":100},{"url":"https://www.gravatar.com/avatar/ec517f4126dd292151b452ce4d1edf31.jpg?d\u003didenticon\u0026r\u003dpg\u0026s\u003d120","height":120}]},"ref":"refs/changes/29/55829/3","fetch":{"anonymous http":{"url":"https://review.couchbase.org/ep-engine","ref":"refs/changes/29/55829/3","commands":{"Branch":"git fetch https://review.couchbase.org/ep-engine refs/changes/29/55829/3 \u0026\u0026 git checkout -b change-55829 FETCH_HEAD","Checkout":"git fetch https://review.couchbase.org/ep-engine refs/changes/29/55829/3 \u0026\u0026 git checkout FETCH_HEAD","Cherry Pick":"git fetch https://review.couchbase.org/ep-engine refs/changes/29/55829/3 \u0026\u0026 git cherry-pick FETCH_HEAD","Format Patch":"git fetch https://review.couchbase.org/ep-engine refs/changes/29/55829/3 \u0026\u0026 git format-patch -1 --stdout FETCH_HEAD","Pull":"git pull https://review.couchbase.org/ep-engine refs/changes/29/55829/3","Reset To":"git fetch https://review.couchbase.org/ep-engine refs/changes/29/55829/3 \u0026\u0026 git reset --hard FETCH_HEAD"}}},"commit":{"parents":[{"commit":"a518975320f3e3cb0f3270182955eb0e43543bcd","subject":"Make cookie atomic to serialize set/get in ConnHandler"}],"author":{"name":"Dave Rigby","email":"daver@couchbase.com","date":"2015-10-06 14:29:34.000000000","tz":0},"committer":{"name":"Chiyoung Seo","email":"chiyoung@couchbase.com","date":"2015-10-07 16:52:13.000000000","tz":0},"subject":"Fix race in void ExecutorPool::doWorkerStat","message":"Fix race in void ExecutorPool::doWorkerStat\n\nAs reported by ThreadSanitizer (see below), there is a race between\nsetting the current task associated with a ExecutorThread and reading\nthe name of that thread.\n\nUnfortunately there doesn\u0027t seem to be a straightforward way to solve\nthis without adding a new mutex; currentTask (the variable the race is\non) is a SingleThreadedRCPtr, which is non-trivial to make thread-safe\n(i.e. atomic). I did consider changing currenTask (and all other\nExTask variables) to be a std::shared_ptr as in C++11 this has support\nfor updating atomically, however the support in mainstream compilers\napparently isn\u0027t quite there yet.\n\nTherefore I\u0027ve just added a mutex to guard currentTask.\n\nThreadSanitizer report:\n\nWARNING: ThreadSanitizer: data race (pid\u003d27332)\n  Read of size 8 at 0x7d340000c8f0 by main thread (mutexes: write M19366):\n    #0 ExecutorThread::getTaskableName() const /home/couchbase/couchbase/ep-engine/src/atomic.h:309 (ep.so+0x0000000e6178)\n    #1 EventuallyPersistentEngine::getStats(void const*, char const*, int, void (*)(char const*, unsigned short, char const*, unsigned int, void const*)) /home/couchbase/couchbase/ep-engine/src/ep_engine.cc:4346 (ep.so+0x0000000bc4dd)\n    #2 EvpGetStats(engine_interface*, void const*, char const*, int, void (*)(char const*, unsigned short, char const*, unsigned int, void const*)) /home/couchbase/couchbase/ep-engine/src/ep_engine.cc:213 (ep.so+0x0000000ab49e)\n    #3 mock_get_stats(engine_interface*, void const*, char const*, int, void (*)(char const*, unsigned short, char const*, unsigned int, void const*)) /home/couchbase/couchbase/memcached/programs/engine_testapp/engine_testapp.cc:239 (engine_testapp+0x0000004c54ad)\n    #4 test_worker_stats(engine_interface*, engine_interface_v1*) /home/couchbase/couchbase/ep-engine/tests/ep_testsuite.cc:8901 (ep_testsuite.so+0x000000039768)\n    #5 execute_test(test, char const*, char const*) /home/couchbase/couchbase/memcached/programs/engine_testapp/engine_testapp.cc:1090 (engine_testapp+0x0000004c40b2)\n    #6 __libc_start_main /build/buildd/eglibc-2.15/csu/libc-start.c:226 (libc.so.6+0x00000002176c)\n\n  Previous write of size 8 at 0x7d340000c8f0 by thread T5:\n    #0 ExecutorThread::run() /home/couchbase/couchbase/ep-engine/src/atomic.h:322 (ep.so+0x0000000e9906)\n    #1 launch_executor_thread(void*) /home/couchbase/couchbase/ep-engine/src/executorthread.cc:33 (ep.so+0x0000000e9795)\n    #2 platform_thread_wrap /home/couchbase/.ccache/tmp/cb_pthread.tmp.00b591814417.18511.i (libplatform.so.0.1.0+0x000000003d91)\n\nChange-Id: Id02f7a98b40b952a415cf9027a8f2243af38fc4d\nReviewed-on: http://review.couchbase.org/55829\nTested-by: buildbot \u003cbuild@couchbase.com\u003e\nReviewed-by: Chiyoung Seo \u003cchiyoung@couchbase.com\u003e\n"},"parents_data":[{"branch_name":"refs/heads/master","commit_id":"a518975320f3e3cb0f3270182955eb0e43543bcd","is_merged_in_target_branch":true,"change_id":"I8a668f17013c95abc9786d853ed2c6462cae5320","change_number":55794,"patch_set_number":7,"change_status":"MERGED"}],"branch":"refs/heads/master"}},"requirements":[],"submit_records":[],"submit_requirements":[]}