diff options
| author | Dawid Potocki <dawid@dawidpotocki.com> | 2024-03-05 14:09:27 +1300 |
|---|---|---|
| committer | Dawid Potocki <dawid@dawidpotocki.com> | 2024-03-05 20:34:15 +1300 |
| commit | 063e15900bda8453fb0fc6751e78d064501ccbae (patch) | |
| tree | a4cd5f01dbca33a262333aff10e1e035217a30c8 /externals/breakpad/src/processor/static_range_map-inl.h | |
| parent | 537296095ab24eddcb196b5ef98004f91de9c8c2 (diff) | |
Diffstat (limited to 'externals/breakpad/src/processor/static_range_map-inl.h')
| -rw-r--r-- | externals/breakpad/src/processor/static_range_map-inl.h | 129 |
1 files changed, 129 insertions, 0 deletions
diff --git a/externals/breakpad/src/processor/static_range_map-inl.h b/externals/breakpad/src/processor/static_range_map-inl.h new file mode 100644 index 0000000000..b0a3274798 --- /dev/null +++ b/externals/breakpad/src/processor/static_range_map-inl.h @@ -0,0 +1,129 @@ +// Copyright 2010 Google LLC +// +// 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 LLC 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-inl.h: StaticRangeMap implementation. +// +// See static_range_map.h for documentation. +// +// Author: Siyang Xie (lambxsy@google.com) + +#ifndef PROCESSOR_STATIC_RANGE_MAP_INL_H__ +#define PROCESSOR_STATIC_RANGE_MAP_INL_H__ + +#include "processor/static_range_map.h" +#include "processor/logging.h" + +namespace google_breakpad { + +template<typename AddressType, typename EntryType> +bool StaticRangeMap<AddressType, EntryType>::RetrieveRange( + const AddressType& address, const EntryType*& entry, + AddressType* entry_base, AddressType* entry_size) const { + MapConstIterator iterator = map_.lower_bound(address); + if (iterator == map_.end()) + return false; + + // The map is keyed by the high address of each range, so |address| is + // guaranteed to be lower than the range's high address. If |range| is + // not directly preceded by another range, it's possible for address to + // be below the range's low address, though. When that happens, address + // references something not within any range, so return false. + + const Range* range = iterator.GetValuePtr(); + + // Make sure AddressType and EntryType are copyable basic types + // e.g.: integer types, pointers etc + if (address < range->base()) + return false; + + entry = range->entryptr(); + if (entry_base) + *entry_base = range->base(); + if (entry_size) + *entry_size = iterator.GetKey() - range->base() + 1; + + return true; +} + + +template<typename AddressType, typename EntryType> +bool StaticRangeMap<AddressType, EntryType>::RetrieveNearestRange( + const AddressType& address, const EntryType*& entry, + AddressType* entry_base, AddressType* entry_size) const { + // If address is within a range, RetrieveRange can handle it. + if (RetrieveRange(address, entry, entry_base, entry_size)) + return true; + + // upper_bound gives the first element whose key is greater than address, + // but we want the first element whose key is less than or equal to address. + // Decrement the iterator to get there, but not if the upper_bound already + // points to the beginning of the map - in that case, address is lower than + // the lowest stored key, so return false. + + MapConstIterator iterator = map_.upper_bound(address); + if (iterator == map_.begin()) + return false; + --iterator; + + const Range* range = iterator.GetValuePtr(); + entry = range->entryptr(); + if (entry_base) + *entry_base = range->base(); + if (entry_size) + *entry_size = iterator.GetKey() - range->base() + 1; + + return true; +} + +template<typename AddressType, typename EntryType> +bool StaticRangeMap<AddressType, EntryType>::RetrieveRangeAtIndex( + int index, const EntryType*& entry, + AddressType* entry_base, AddressType* entry_size) const { + + if (index >= GetCount()) { + BPLOG(ERROR) << "Index out of range: " << index << "/" << GetCount(); + return false; + } + + MapConstIterator iterator = map_.IteratorAtIndex(index); + + const Range* range = iterator.GetValuePtr(); + + entry = range->entryptr(); + if (entry_base) + *entry_base = range->base(); + if (entry_size) + *entry_size = iterator.GetKey() - range->base() + 1; + + return true; +} + +} // namespace google_breakpad + + +#endif // PROCESSOR_STATIC_RANGE_MAP_INL_H__ |