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_contained_range_map-inl.h | |
| parent | 537296095ab24eddcb196b5ef98004f91de9c8c2 (diff) | |
Diffstat (limited to 'externals/breakpad/src/processor/static_contained_range_map-inl.h')
| -rw-r--r-- | externals/breakpad/src/processor/static_contained_range_map-inl.h | 108 |
1 files changed, 108 insertions, 0 deletions
diff --git a/externals/breakpad/src/processor/static_contained_range_map-inl.h b/externals/breakpad/src/processor/static_contained_range_map-inl.h new file mode 100644 index 0000000000..60606ddc63 --- /dev/null +++ b/externals/breakpad/src/processor/static_contained_range_map-inl.h @@ -0,0 +1,108 @@ +// 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_contained_range_map-inl.h: Hierarchically-organized range map, +// i.e., StaticContainedRangeMap implementation. +// +// See static_contained_range_map.h for documentation. +// +// Author: Siyang Xie (lambxsy@google.com) + +#ifndef PROCESSOR_STATIC_CONTAINED_RANGE_MAP_INL_H__ +#define PROCESSOR_STATIC_CONTAINED_RANGE_MAP_INL_H__ + +#include "processor/static_contained_range_map.h" +#include "processor/logging.h" + +namespace google_breakpad { + +template<typename AddressType, typename EntryType> +StaticContainedRangeMap<AddressType, EntryType>::StaticContainedRangeMap( + const char *base) + : base_(*(reinterpret_cast<const AddressType*>(base))), + entry_size_(*(reinterpret_cast<const uint32_t*>(base + sizeof(base_)))), + entry_ptr_(reinterpret_cast<const EntryType*>( + base + sizeof(base_) + sizeof(entry_size_))), + map_(base + sizeof(base_) + sizeof(entry_size_) + entry_size_) { + if (entry_size_ == 0) + entry_ptr_ = NULL; +} + + +template<typename AddressType, typename EntryType> +bool StaticContainedRangeMap<AddressType, EntryType>::RetrieveRange( + const AddressType& address, const EntryType*& entry) const { + + // Get an iterator to the child range whose high address is equal to or + // greater than the supplied address. If the supplied address is higher + // than all of the high addresses in the range, then this range does not + // contain a child at address, so return false. If the supplied address + // is lower than the base address of the child range, then it is not within + // the child range, so return false. + MapConstIterator iterator = map_.lower_bound(address); + + if (iterator == map_.end()) + return false; + + const char *memory_child = + reinterpret_cast<const char*>(iterator.GetValuePtr()); + + StaticContainedRangeMap child_map(memory_child); + + if (address < child_map.base_) + return false; + + // The child in iterator->second contains the specified address. Find out + // if it has a more-specific descendant that also contains it. If it does, + // it will set |entry| appropriately. If not, set |entry| to the child. + if (!child_map.RetrieveRange(address, entry)) + entry = child_map.entry_ptr_; + + return true; +} + +template <typename AddressType, typename EntryType> +bool StaticContainedRangeMap<AddressType, EntryType>::RetrieveRanges( + const AddressType& address, + std::vector<const EntryType*>& entries) const { + MapConstIterator iterator = map_.lower_bound(address); + if (iterator == map_.end()) + return false; + const char* memory_child = + reinterpret_cast<const char*>(iterator.GetValuePtr()); + StaticContainedRangeMap child_map(memory_child); + if (address < child_map.base_) + return false; + child_map.RetrieveRanges(address, entries); + entries.push_back(child_map.entry_ptr_); + return true; +} + +} // namespace google_breakpad + +#endif // PROCESSOR_STATIC_CONTAINED_RANGE_MAP_INL_H__ |