Remove the code that tried to lock out allocation of virtual memory while the Windows version of remapPrivateView was remapping a memory- mapped file. It didn't solve the problem but did affect performance.
…ses like older versions
…al query won't work anymore
… new behavior.
Modify the Windows stack trace printing code to accept a "context", and use the context record passed to the unhandled exception filter to start the stack trace at the faulting instruction. Collect the context used for "normal" stack traces from inside printStackTrace.