Add MemoryBuffer::getBufferKind() to report whether a memory buffer uses malloc'ed or mmap'ed memory. This is for performance analysis.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@130432 91177308-0d34-0410-b5e6-96231b3b80d8

1 files changed, 8 insertions, 0 deletions

diff --git a/lib/Support/MemoryBuffer.cpp b/lib/Support/MemoryBuffer.cpp
index ea72720b7f..e2b5b7a585 100644
--- a/lib/Support/MemoryBuffer.cpp
+++ b/lib/Support/MemoryBuffer.cpp
@@ -86,6 +86,10 @@ public:
      // The name is stored after the class itself.
     return reinterpret_cast<const char*>(this + 1);
   }
+  
+  virtual BufferKind getBufferKind() const {
+    return MemoryBuffer_Malloc;
+  }
 };
 }
 
@@ -191,6 +195,10 @@ public:
     sys::Path::UnMapFilePages(reinterpret_cast<const char*>(RealStart),
                               RealSize);
   }
+  
+  virtual BufferKind getBufferKind() const {
+    return MemoryBuffer_MMap;
+  }
 };
 }