Preallocate jump stubs for dynamic methods (#9883)

Preallocate jump stubs for dynamic methods

- This eliminates the possibility of running into an out-of-memory situation after compiling the method
- The temporary entry points block containing FixupPrecodes is extended for dynamic methods to include sufficient space for jump stubs
- When the target is too far for the FixupPrecode to encode a short relative jump, it instead does a short relative call or jump to the corresponding jump stub, which does an absolute jump to the target

1 files changed, 2 insertions, 7 deletions

diff --git a/src/vm/precode.h b/src/vm/precode.h
index 430da663d7..0afa762647 100644
--- a/src/vm/precode.h
+++ b/src/vm/precode.h
@@ -311,13 +311,8 @@ public:
 
     static Precode * GetPrecodeForTemporaryEntryPoint(TADDR temporaryEntryPoints, int index);
 
-    static SIZE_T SizeOfTemporaryEntryPoints(PrecodeType t, int count);
-    static SIZE_T SizeOfTemporaryEntryPoints(TADDR temporaryEntryPoints, int count)
-    {
-        WRAPPER_NO_CONTRACT;
-        SUPPORTS_DAC;
-        return SizeOfTemporaryEntryPoints(PTR_Precode(temporaryEntryPoints)->GetType(), count);
-    }
+    static SIZE_T SizeOfTemporaryEntryPoints(PrecodeType t, bool preallocateJumpStubs, int count);
+    static SIZE_T SizeOfTemporaryEntryPoints(TADDR temporaryEntryPoints, int count);
 
     static TADDR AllocateTemporaryEntryPoints(MethodDescChunk* pChunk,
         LoaderAllocator *pLoaderAllocator, AllocMemTracker *pamTracker);