Fix VS4Mac crash report and core dump generation perf problems#60205

Merged

mikem8361 merged 5 commits intodotnet:mainfrom

mikem8361:macoscrashreport

Oct 12, 2021

Commits on Oct 12, 2021

Refactor the DAC enumerate memory region phase out of gather crash info
Mike McLaughlin
committed
Since on both Linux and MacOS all the RW regions have been already added
Mike McLaughlin
committed
Move current_c_gc_state out of !MULTIPLE_HEAPS

cshung
authored and
Mike McLaughlin
committed
Code review feedback
Mike McLaughlin
committed
Opt into fast heap dumps with COMPlus_DbgEnableFastHeapDumps=1 env var to mitigate the
Mike McLaughlin
committed