[mini] Use atomics instead of loader lock for JIT wrappers and trampolines#104038
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lambdageek merged 4 commits intodotnet:mainfrom Jun 27, 2024
Merged
[mini] Use atomics instead of loader lock for JIT wrappers and trampolines#104038lambdageek merged 4 commits intodotnet:mainfrom
lambdageek merged 4 commits intodotnet:mainfrom
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Related to dotnet#93686 While this doesn't eliminate all deadlocks related to the global loader lock and managed locks, it removes one unneeded use of the loader lock. The wrapper (and trampoline) of a JIT icall are only ever set from NULL to non-NULL. We can use atomics to deal with races instad of double checked locking. This was not the case historically, because the JIT info was dynamically allocated - so we used the loader lock to protect the integrity of the hash table
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steveisok
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Are the WASM timeouts expected? |
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Related to #93686
While this doesn't eliminate all deadlocks related to the global loader lock and managed locks, it removes one unneeded use of the loader lock.
The wrapper (and trampoline) of a JIT icall are only ever set from NULL to non-NULL. We can use atomics to deal with races instad of double checked locking. This was not the case historically, because the JIT info was dynamically allocated - so we used the loader lock to protect the integrity of the hash table