Sketch out a DWARF parser.

This introduces a new library to LLVM: libDebugInfo. It will provide debug information
parsing to LLVM. Much of the design and some of the code is taken from the LLDB project.

It also contains an llvm-dwarfdump tool that can dump the abbrevs and DIEs from an
object file. It can be used to write tests for DWARF input and output easily.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@139627 91177308-0d34-0410-b5e6-96231b3b80d8

1 files changed, 42 insertions, 0 deletions

diff --git a/include/llvm/DebugInfo/DIContext.h b/include/llvm/DebugInfo/DIContext.h
new file mode 100644
index 0000000000..ea9d505747
--- /dev/null
+++ b/include/llvm/DebugInfo/DIContext.h
@@ -0,0 +1,42 @@
+//===-- DIContext.h ---------------------------------------------*- C++ -*-===//
+//
+//                     The LLVM Compiler Infrastructure
+//
+// This file is distributed under the University of Illinois Open Source
+// License. See LICENSE.TXT for details.
+//
+//===----------------------------------------------------------------------===//
+//
+// This file defines DIContext, and abstract data structure that holds
+// debug information data.
+//
+//===----------------------------------------------------------------------===//
+
+#ifndef LLVM_DEBUGINFO_DICONTEXT_H
+#define LLVM_DEBUGINFO_DICONTEXT_H
+
+#include "llvm/ADT/StringRef.h"
+#include "llvm/DebugInfo/DILineInfo.h"
+
+namespace llvm {
+
+class raw_ostream;
+
+class DIContext {
+public:
+  virtual ~DIContext();
+
+  /// getDWARFContext - get a context for binary DWARF data.
+  static DIContext *getDWARFContext(bool isLittleEndian,
+                                    StringRef infoSection,
+                                    StringRef abbrevSection,
+                                    StringRef aRangeSection = StringRef(),
+                                    StringRef lineSection = StringRef(),
+                                    StringRef stringSection = StringRef());
+
+  virtual void dump(raw_ostream &OS) = 0;
+};
+
+}
+
+#endif