diff -r 000000000000 -r 6474c204b198 tools/profiler/LulDwarfSummariser.h
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/tools/profiler/LulDwarfSummariser.h	Wed Dec 31 06:09:35 2014 +0100
@@ -0,0 +1,52 @@
+/* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
+/* vim: set ts=8 sts=2 et sw=2 tw=80: */
+/* This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
+
+#ifndef LulDwarfSummariser_h
+#define LulDwarfSummariser_h
+
+#include "LulMainInt.h"
+
+namespace lul {
+
+class Summariser
+{
+public:
+  Summariser(SecMap* aSecMap, uintptr_t aTextBias, void(*aLog)(const char*));
+
+  void Entry(uintptr_t aAddress, uintptr_t aLength);
+  void End();
+  void Rule(uintptr_t aAddress,
+            int aNewReg, int aOldReg, intptr_t aOffset, bool aDeref);
+
+private:
+  // The SecMap in which we park the finished summaries (RuleSets).
+  SecMap* mSecMap;
+
+  // Running state for the current summary (RuleSet) under construction.
+  RuleSet mCurrRules;
+
+  // The start of the address range to which the RuleSet under
+  // construction applies.
+  uintptr_t mCurrAddr;
+
+  // The highest address, plus one, for which the RuleSet under
+  // construction could possibly apply.  If there are no further
+  // incoming events then mCurrRules will eventually be emitted
+  // as-is, for the range mCurrAddr.. mMax1Addr - 1, if that is
+  // nonempty.
+  uintptr_t mMax1Addr;
+
+  // The bias value (to add to the SVMAs, to get AVMAs) to be used
+  // when adding entries into mSecMap.
+  uintptr_t mTextBias;
+
+  // A logging sink, for debugging.
+  void (*mLog)(const char* aFmt);
+};
+
+} // namespace lul
+
+#endif // LulDwarfSummariser_h