[llvm-commits] [llvm] r130432 - in /llvm/trunk: include/llvm/Support/MemoryBuffer.h lib/Support/MemoryBuffer.cpp

[Ted Kremenek]

Author: kremenek
Date: Thu Apr 28 15:34:18 2011
New Revision: 130432

URL: http://llvm.org/viewvc/llvm-project?rev=130432&view=rev
Log:
Add MemoryBuffer::getBufferKind() to report whether a memory buffer uses malloc'ed or mmap'ed memory.  This is for performance analysis.

Modified:
    llvm/trunk/include/llvm/Support/MemoryBuffer.h
    llvm/trunk/lib/Support/MemoryBuffer.cpp

Modified: llvm/trunk/include/llvm/Support/MemoryBuffer.h
URL: http://llvm.org/viewvc/llvm-project/llvm/trunk/include/llvm/Support/MemoryBuffer.h?rev=130432&r1=130431&r2=130432&view=diff
==============================================================================
--- llvm/trunk/include/llvm/Support/MemoryBuffer.h (original)
+++ llvm/trunk/include/llvm/Support/MemoryBuffer.h Thu Apr 28 15:34:18 2011
@@ -119,6 +119,21 @@
   static error_code getFileOrSTDIN(const char *Filename,
                                    OwningPtr<MemoryBuffer> &result,
                                    int64_t FileSize = -1);
+  
+  
+  //===--------------------------------------------------------------------===//
+  // Provided for performance analysis.
+  //===--------------------------------------------------------------------===//
+
+  /// The kind of memory backing used to support the MemoryBuffer.
+  enum BufferKind {
+    MemoryBuffer_Malloc,
+    MemoryBuffer_MMap
+  };
+
+  /// Return information on the memory mechanism used to support the
+  /// MemoryBuffer.
+  virtual BufferKind getBufferKind() const = 0;  
 };
 
 } // end namespace llvm

Modified: llvm/trunk/lib/Support/MemoryBuffer.cpp
URL: http://llvm.org/viewvc/llvm-project/llvm/trunk/lib/Support/MemoryBuffer.cpp?rev=130432&r1=130431&r2=130432&view=diff
==============================================================================
--- llvm/trunk/lib/Support/MemoryBuffer.cpp (original)
+++ llvm/trunk/lib/Support/MemoryBuffer.cpp Thu Apr 28 15:34:18 2011
@@ -86,6 +86,10 @@
      // 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 @@
     sys::Path::UnMapFilePages(reinterpret_cast<const char*>(RealStart),
                               RealSize);
   }
+  
+  virtual BufferKind getBufferKind() const {
+    return MemoryBuffer_MMap;
+  }
 };
 }