Re: [PATCH 0/3] TSA: make sure QEMU compiles when using clang TSA

[Stefan Hajnoczi]

On Tue, Jan 17, 2023 at 08:52:00AM -0500, Emanuele Giuseppe Esposito wrote:
> This serie aims to enable clang Thread Safety Analysis (TSA) in QEMU.

It's worth covering what TSA is and why it's useful:

Thread Safety Analysis "warns about potential race conditions in code.
The analysis is completely static (i.e. compile-time); there is no
run-time overhead"

"Thread safety analysis works very much like a type system for
multi-threaded programs. In addition to declaring the type of data (e.g.
int, float, etc.), the programmer can (optionally) declare how access to
that data is controlled in a multi-threaded environment. For example, if
foo is guarded by the mutex mu, then the analysis will issue a warning
whenever a piece of code reads or writes to foo without first locking
mu."

https://clang.llvm.org/docs/ThreadSafetyAnalysis.html

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