public override void Generate(out IntPtr destination, Assembler assembler)
{
if (assembler == null)
throw new ArgumentNullException("assembler");
Contract.EndContractBlock();
// Disallow empty code generation.
long codeSize = assembler.CodeSize;
if (codeSize == 0)
{
destination = IntPtr.Zero;
throw new AssemblerException("The assembler has no code to generate.");
}
// Switch to global memory manager if not provided.
MemoryManager memmgr = MemoryManager ?? MemoryManager.Global;
IntPtr p = memmgr.Alloc(codeSize, AllocType);
if (p == IntPtr.Zero)
{
destination = IntPtr.Zero;
throw new JitException("Out of virtual memory.");
}
// Relocate the code.
IntPtr relocatedSize = assembler.RelocCode(p);
// Return unused memory to memory manager.
if (relocatedSize.ToInt64() < codeSize)
{
memmgr.Shrink(p, relocatedSize);
}
// Mark memory
if (_memoryMarker != null)
_memoryMarker.Mark(p, relocatedSize);
// Return the code.
destination = p;
}