diff options
Diffstat (limited to 'runtime/dex_file_layout.cc')
-rw-r--r-- | runtime/dex_file_layout.cc | 83 |
1 files changed, 83 insertions, 0 deletions
diff --git a/runtime/dex_file_layout.cc b/runtime/dex_file_layout.cc new file mode 100644 index 0000000000..4375d7f799 --- /dev/null +++ b/runtime/dex_file_layout.cc @@ -0,0 +1,83 @@ +/* + * Copyright (C) 2017 The Android Open Source Project + * + * Licensed under the Apache License, Version 2.0 (the "License"); + * you may not use this file except in compliance with the License. + * You may obtain a copy of the License at + * + * http://www.apache.org/licenses/LICENSE-2.0 + * + * Unless required by applicable law or agreed to in writing, software + * distributed under the License is distributed on an "AS IS" BASIS, + * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. + * See the License for the specific language governing permissions and + * limitations under the License. + */ + +#include "dex_file_layout.h" + +#include <sys/mman.h> + +#include "dex_file.h" +#include "utils.h" + +namespace art { + +void DexLayoutSection::Subsection::Madvise(const DexFile* dex_file, int advice) const { + DCHECK(dex_file != nullptr); + DCHECK_LE(size_, dex_file->Size()); + DCHECK_LE(offset_ + size_, dex_file->Size()); + MadviseLargestPageAlignedRegion(dex_file->Begin() + offset_, + dex_file->Begin() + offset_ + size_, + advice); +} + +void DexLayoutSections::Madvise(const DexFile* dex_file, MadviseState state) const { + // The dex file is already defaulted to random access everywhere. + for (const DexLayoutSection& section : sections_) { + switch (state) { + case MadviseState::kMadviseStateAtLoad: { + section.parts_[static_cast<size_t>(LayoutType::kLayoutTypeStartupOnly)].Madvise( + dex_file, + MADV_WILLNEED); + section.parts_[static_cast<size_t>(LayoutType::kLayoutTypeHot)].Madvise( + dex_file, + MADV_WILLNEED); + break; + } + case MadviseState::kMadviseStateFinishedLaunch: { + section.parts_[static_cast<size_t>(LayoutType::kLayoutTypeStartupOnly)].Madvise( + dex_file, + MADV_DONTNEED); + break; + } + case MadviseState::kMadviseStateFinishedTrim: { + section.parts_[static_cast<size_t>(LayoutType::kLayoutTypeSometimesUsed)].Madvise( + dex_file, + MADV_DONTNEED); + section.parts_[static_cast<size_t>(LayoutType::kLayoutTypeUsedOnce)].Madvise( + dex_file, + MADV_DONTNEED); + break; + } + } + } +} + +std::ostream& operator<<(std::ostream& os, const DexLayoutSection& section) { + for (size_t i = 0; i < static_cast<size_t>(LayoutType::kLayoutTypeCount); ++i) { + const DexLayoutSection::Subsection& part = section.parts_[i]; + os << static_cast<LayoutType>(i) << "(" + << part.offset_ << "-" << part.offset_ + part.size_ << ") "; + } + return os; +} + +std::ostream& operator<<(std::ostream& os, const DexLayoutSections& sections) { + for (size_t i = 0; i < static_cast<size_t>(DexLayoutSections::SectionType::kSectionCount); ++i) { + os << static_cast<DexLayoutSections::SectionType>(i) << ":" << sections.sections_[i] << "\n"; + } + return os; +} + +} // namespace art |