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// Copyright (c) 2010, 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.
//
// static_range_map.h: StaticRangeMap.
//
// StaticRangeMap is similar as RangeMap. However, StaticRangeMap wraps a
// StaticMap instead of std::map, and does not support dynamic operations like
// StoreRange(...). StaticRangeMap provides same Retrieve*() interfaces as
// RangeMap. Please see range_map.h for more documentation.
//
// Author: Siyang Xie (lambxsy@google.com)
#ifndef PROCESSOR_STATIC_RANGE_MAP_H__
#define PROCESSOR_STATIC_RANGE_MAP_H__
#include "processor/static_map-inl.h"
namespace google_breakpad {
// AddressType is basic type, e.g.: integer types, pointers etc
// EntryType could be a complex type, so we retrieve its pointer instead.
template<typename AddressType, typename EntryType>
class StaticRangeMap {
public:
StaticRangeMap(): map_() { }
explicit StaticRangeMap(const char *memory): map_(memory) { }
// 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, const 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, const 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, const EntryType *&entry,
AddressType *entry_base, AddressType *entry_size)
const;
// Returns the number of ranges stored in the RangeMap.
inline int GetCount() const { return map_.size(); }
private:
friend class ModuleComparer;
class Range {
public:
AddressType base() const {
return *(reinterpret_cast<const AddressType*>(this));
}
const EntryType* entryptr() const {
return reinterpret_cast<const EntryType*>(this + sizeof(AddressType));
}
};
// Convenience types.
typedef StaticRangeMap* SelfPtr;
typedef StaticMap<AddressType, Range> AddressToRangeMap;
typedef typename AddressToRangeMap::const_iterator MapConstIterator;
AddressToRangeMap map_;
};
} // namespace google_breakpad
#endif // PROCESSOR_STATIC_RANGE_MAP_H__
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