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-rw-r--r--runtime/dex_file_layout.cc83
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diff --git a/runtime/dex_file_layout.cc b/runtime/dex_file_layout.cc
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+/*
+ * 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