Cache the VM page size that we get from task_vm_info so we don't
re-fetch the value.

llvm-svn: 178962
diff --git a/lldb/tools/debugserver/source/MacOSX/MachVMMemory.cpp b/lldb/tools/debugserver/source/MacOSX/MachVMMemory.cpp
index 0b47c63..c28a534 100644
--- a/lldb/tools/debugserver/source/MacOSX/MachVMMemory.cpp
+++ b/lldb/tools/debugserver/source/MacOSX/MachVMMemory.cpp
@@ -43,7 +43,8 @@
             if (kr == KERN_SUCCESS)
             {
                 DNBLogThreadedIf(LOG_TASK, "MachVMMemory::PageSize task_info returned page size of 0x%x", (int) vm_info.page_size);
-                return vm_info.page_size;
+                m_page_size = vm_info.page_size;
+                return m_page_size;
             }
             else
             {