The Tor Browser: comparison toolkit/crashreporter/google-breakpad/src/processor/range

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+// Copyright (c) 2006, Google Inc.
+// All rights reserved.
+//
+// Redistribution and use in source and binary forms, with or without
+// modification, are permitted provided that the following conditions are
+// met:
+//
+//     * Redistributions of source code must retain the above copyright
+// notice, this list of conditions and the following disclaimer.
+//     * Redistributions in binary form must reproduce the above
+// copyright notice, this list of conditions and the following disclaimer
+// in the documentation and/or other materials provided with the
+// distribution.
+//     * Neither the name of Google Inc. nor the names of its
+// contributors may be used to endorse or promote products derived from
+// this software without specific prior written permission.
+//
+// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+// "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+// LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+// A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+// OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+// LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+// DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+// THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+// (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+// OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+// range_map.h: Range maps.
+//
+// A range map associates a range of addresses with a specific object.  This
+// is useful when certain objects of variable size are located within an
+// address space.  The range map makes it simple to determine which object is
+// associated with a specific address, which may be any address within the
+// range associated with an object.
+//
+// Author: Mark Mentovai
+#ifndef PROCESSOR_RANGE_MAP_H__
+#define PROCESSOR_RANGE_MAP_H__
+#include <map>
+namespace google_breakpad {
+// Forward declarations (for later friend declarations of specialized template).
+template<class, class> class RangeMapSerializer;
+template<typename AddressType, typename EntryType>
+class RangeMap {
+public:
+RangeMap() : map_() {}
+// Inserts a range into the map.  Returns false for a parameter error,
+// or if the location of the range would conflict with a range already
+// stored in the map.
+bool StoreRange(const AddressType &base,
+const AddressType &size,
+const EntryType &entry);
+// Locates the range encompassing the supplied address.  If there is
+// no such range, returns false.  entry_base and entry_size, if non-NULL,
+// are set to the base and size of the entry's range.
+bool RetrieveRange(const AddressType &address, EntryType *entry,
+AddressType *entry_base, AddressType *entry_size) const;
+// Locates the range encompassing the supplied address, if one exists.
+// If no range encompasses the supplied address, locates the nearest range
+// to the supplied address that is lower than the address.  Returns false
+// if no range meets these criteria.  entry_base and entry_size, if
+// non-NULL, are set to the base and size of the entry's range.
+bool RetrieveNearestRange(const AddressType &address, EntryType *entry,
+AddressType *entry_base, AddressType *entry_size)
+const;
+// Treating all ranges as a list ordered by the address spaces that they
+// occupy, locates the range at the index specified by index.  Returns
+// false if index is larger than the number of ranges stored.  entry_base
+// and entry_size, if non-NULL, are set to the base and size of the entry's
+// range.
+//
+// RetrieveRangeAtIndex is not optimized for speedy operation.
+bool RetrieveRangeAtIndex(int index, EntryType *entry,
+AddressType *entry_base, AddressType *entry_size)
+const;
+// Returns the number of ranges stored in the RangeMap.
+int GetCount() const;
+// Empties the range map, restoring it to the state it was when it was
+// initially created.
+void Clear();
+private:
+// Friend declarations.
+friend class ModuleComparer;
+friend class RangeMapSerializer<AddressType, EntryType>;
+class Range {
+public:
+Range(const AddressType &base, const EntryType &entry)
+: base_(base), entry_(entry) {}
+AddressType base() const { return base_; }
+EntryType entry() const { return entry_; }
+private:
+// The base address of the range.  The high address does not need to
+// be stored, because RangeMap uses it as the key to the map.
+const AddressType base_;
+// The entry corresponding to a range.
+const EntryType entry_;
+};
+// Convenience types.
+typedef std::map<AddressType, Range> AddressToRangeMap;
+typedef typename AddressToRangeMap::const_iterator MapConstIterator;
+typedef typename AddressToRangeMap::value_type MapValue;
+// Maps the high address of each range to a EntryType.
+AddressToRangeMap map_;
+};
+}  // namespace google_breakpad
+#endif  // PROCESSOR_RANGE_MAP_H__

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comparison: toolkit/crashreporter/google-breakpad/src/processor/range_map.h

toolkit/crashreporter/google-breakpad/src/processor/range_map.h