https://bugs.llvm.org/show_bug.cgi?id=43632
Bug ID: 43632
Summary: local static object not Thread safe on Ubuntu 16 clang
3.7
Product: libc++
Version: 3.7
Hardware: PC
OS: Linux
Status: NEW
Severity: enhancement
Priority: P
Component: All Bugs
Assignee: [email protected]
Reporter: [email protected]
CC: [email protected], [email protected]
Hi,
We are using Clang 3.7 with flag -- -std=c++14
We found an issue with Singleton thread safe.
In our code we implemented “Meyers Singleton” as described in
https://www.modernescpp.com/index.php/thread-safe-initialization-of-data
This is thread safe implementation guaranteed by std C++ 11 and has by far
better performance according to
https://www.modernescpp.com/index.php/thread-safe-initialization-of-a-singleton
However, this implementation is not thread safe if using libc++ 11
compilation, as we happen to know now, and we had to add a lock_guard to
overcome this issue.
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