[Mono-bugs] [Bug 670791] Fast path for lock() needed in the 4.0 profile

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https://bugzilla.novell.com/show_bug.cgi?id=670791

https://bugzilla.novell.com/show_bug.cgi?id=670791#c2


--- Comment #2 from Gonzalo Paniagua Javier <gonzalo at novell.com> 2011-02-10 03:37:07 UTC ---
Whenever there is a lock (blah) {} block.
Before 4.0, that was translated to:
      Monitor.Enter (blah) try { } finally {Monitor.Exit (blah);} (or similar).

In 4.0 it is something like:
      try { Monitor.Enter (blah, out _bool); } finally { if (_bool)
Monitor.Exit (blah); }

In this last case, the runtime does not generate a fast enter method.

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