Add a comment, and fix a bug where AllocateRW recurred to AllocateRWX instead of itself.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@48677 91177308-0d34-0410-b5e6-96231b3b80d8

1 files changed, 8 insertions, 0 deletions

diff --git a/include/llvm/System/Memory.h b/include/llvm/System/Memory.h
index 8c1c37a07c..d692b95c27 100644
--- a/include/llvm/System/Memory.h
+++ b/include/llvm/System/Memory.h
@@ -57,6 +57,14 @@ namespace sys {
                                      const MemoryBlock *NearBlock,
                                      std::string *ErrMsg = 0);
 
+      /// This method allocates a block of Read/Write memory.  This memory
+      /// needs to have executable permissions set before it can be used
+      /// to execute JIT'ed code.
+      ///
+      /// On success, this returns a non-null memory block, otherwise it returns
+      /// a null memory block and fills in *ErrMsg.
+      /// 
+      /// @brief Allocate Read/Write/Execute memory.
       static MemoryBlock AllocateRW(unsigned NumBytes,
                                     const MemoryBlock *NearBlock,
                                     std::string *ErrMsg = 0);