Guard the service protocol's global handlers list with a reader/writer lock. #6900
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…h a reader/writer lock (flutter#6888) flutter#6895" (flutter#6899)" This reverts commit b6e9375 and applies fix for tests on Windows.
jason-simmons
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Nov 18, 2018
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flutter/engine@c02dd8f...cebde43 git log c02dd8f..cebde43 --no-merges --oneline cebde43 Guard the service protocol's global handlers list with a reader/writer lock. (flutter/engine#6900) b6e9375 Revert "Guard the service protocol's global handlers list with a reader/writer lock (#6888) #6895" (flutter/engine#6899) b44b94e Roll src/third_party/skia 66b91e4afb88..def9bcecd994 (1 commits) (flutter/engine#6898) 25db6e0 Roll src/third_party/skia d017e5138c57..66b91e4afb88 (1 commits) (flutter/engine#6897) fd0911c Guard the service protocol's global handlers list with a reader/writer lock (#6888) (flutter/engine#6895) fffcce4 Roll src/third_party/skia 1bfdd1adfa22..d017e5138c57 (1 commits) (flutter/engine#6896) a01c82e Roll src/third_party/skia 7e9ea391cfce..1bfdd1adfa22 (1 commits) (flutter/engine#6894) 9ba5561 Revert "Guard the service protocol's global handlers list with a reader/writer lock (#6888)" (flutter/engine#6893) 517e525 Roll src/third_party/skia 73b4a1f57254..7e9ea391cfce (1 commits) (flutter/engine#6892) 9352360 Guard the service protocol's global handlers list with a reader/writer lock (flutter/engine#6888) 9296d80 Roll src/third_party/skia 7fb30f11a055..73b4a1f57254 (3 commits) (flutter/engine#6891) 93cbf60 Roll src/third_party/skia 281224020a57..7fb30f11a055 (1 commits) (flutter/engine#6889) aa9793f Roll src/third_party/skia a2187bf7629a..281224020a57 (5 commits) (flutter/engine#6887) 3978f07 Keep a copy of each engine's description that can be accessed outside the engine's UI thread (flutter/engine#6885) 0870e37 Roll src/third_party/skia 3b155a77c370..a2187bf7629a (11 commits) (flutter/engine#6884) The AutoRoll server is located here: https://autoroll.skia.org/r/flutter-engine-flutter-autoroll Documentation for the AutoRoller is here: https://skia.googlesource.com/buildbot/+/master/autoroll/README.md If the roll is causing failures, please contact the current sheriff, who should be CC'd on the roll, and stop the roller if necessary.
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Relands original #6895 with fix for Windows test failure.
Original description:
The service protocol holds the lock while waiting for completion of service
RPC tasks. These tasks (specifically hot restart/RunInView) may need to
modify a handler's description data.
Task execution and ServiceProtocol::SetHandlerDescription will obtain a shared
lock to make this possible. AddHandler and RemoveHandler will obtain an
exclusive lock in order to guard against a handler being deleted while a
service task is running.
Fix for Windows test is to use unlock_shared when lock_shared is used.