llvm-dwarfdump: Add support for dumping the .debug_loc section
This is a basic implementation - we still don't have any support (that I
know of) for dumping DWARF expressions in a meaningful way, so the
location information itself is just printed as a sequence of bytes as we
do elsewhere.
llvm-svn: 184361
diff --git a/llvm/lib/DebugInfo/DWARFDebugLoc.h b/llvm/lib/DebugInfo/DWARFDebugLoc.h
new file mode 100644
index 0000000..d31aaaa
--- /dev/null
+++ b/llvm/lib/DebugInfo/DWARFDebugLoc.h
@@ -0,0 +1,60 @@
+//===-- DWARFDebugLoc.h -----------------------------------------*- C++ -*-===//
+//
+// The LLVM Compiler Infrastructure
+//
+// This file is distributed under the University of Illinois Open Source
+// License. See LICENSE.TXT for details.
+//
+//===----------------------------------------------------------------------===//
+
+#ifndef LLVM_DEBUGINFO_DWARFDEBUGLOC_H
+#define LLVM_DEBUGINFO_DWARFDEBUGLOC_H
+
+#include "DWARFRelocMap.h"
+#include "llvm/ADT/SmallVector.h"
+#include "llvm/Support/DataExtractor.h"
+
+namespace llvm {
+
+class raw_ostream;
+
+class DWARFDebugLoc {
+ /// A single location within a location list.
+ struct Entry {
+ /// The beginning address of the instruction range.
+ uint64_t Begin;
+ /// The ending address of the instruction range.
+ uint64_t End;
+ /// The location of the variable within the specified range.
+ SmallVector<unsigned char, 4> Loc;
+ };
+
+ /// A list of locations that contain one variable.
+ struct LocationList {
+ /// The beginning offset where this location list is stored in the debug_loc
+ /// section.
+ unsigned Offset;
+ /// All the locations in which the variable is stored.
+ SmallVector<Entry, 2> Entries;
+ };
+
+ typedef SmallVector<LocationList, 4> LocationLists;
+
+ /// A list of all the variables in the debug_loc section, each one describing
+ /// the locations in which the variable is stored.
+ LocationLists Locations;
+
+ /// A map used to resolve binary relocations.
+ const RelocAddrMap &RelocMap;
+
+public:
+ DWARFDebugLoc(const RelocAddrMap &LocRelocMap) : RelocMap(LocRelocMap) {}
+ /// Print the location lists found within the debug_loc section.
+ void dump(raw_ostream &OS) const;
+ /// Parse the debug_loc section accessible via the 'data' parameter using the
+ /// specified address size to interpret the address ranges.
+ void parse(DataExtractor data, unsigned AddressSize);
+};
+}
+
+#endif