This patch adds new functions to the SectionRef and ObjectFile interfaces to determine whether or not a section is meant to be read-only. These functions will be used by the MCJIT RuntimeDyld to give hints to the memory manager during the object loading process in a future patch.

Patch by Ashok Thirumurthi.

llvm-svn: 165586

1 files changed, 11 insertions, 0 deletions

diff --git a/llvm/lib/Object/MachOObjectFile.cpp b/llvm/lib/Object/MachOObjectFile.cpp
index d229671954f..ed9449c50d3 100644
--- a/llvm/lib/Object/MachOObjectFile.cpp
+++ b/llvm/lib/Object/MachOObjectFile.cpp
@@ -612,6 +612,17 @@ error_code MachOObjectFile::isSectionZeroInit(DataRefImpl DRI,
   return object_error::success;
 }
 
+error_code MachOObjectFile::isSectionReadOnlyData(DataRefImpl Sec,
+                                                  bool &Result) const {
+  // Consider using the code from isSectionText to look for __const sections.
+  // Alternately, emit S_ATTR_PURE_INSTRUCTIONS and/or S_ATTR_SOME_INSTRUCTIONS
+  // to use section attributes to distinguish code from data.
+
+  // FIXME: Unimplemented.
+  Result = false;
+  return object_error::success;
+}
+
 error_code MachOObjectFile::sectionContainsSymbol(DataRefImpl Sec,
                                                   DataRefImpl Symb,
                                                   bool &Result) const {