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-rw-r--r--extra/chromium/chromium-VirtualCursor-standard-layout.patch216
1 files changed, 216 insertions, 0 deletions
diff --git a/extra/chromium/chromium-VirtualCursor-standard-layout.patch b/extra/chromium/chromium-VirtualCursor-standard-layout.patch
new file mode 100644
index 0000000..721e194
--- /dev/null
+++ b/extra/chromium/chromium-VirtualCursor-standard-layout.patch
@@ -0,0 +1,216 @@
+diff --git a/sql/recover_module/btree.cc b/sql/recover_module/btree.cc
+index 9ecaafe..839318a 100644
+--- a/sql/recover_module/btree.cc
++++ b/sql/recover_module/btree.cc
+@@ -135,16 +135,25 @@
+ "Move the destructor to the .cc file if it's non-trival");
+ #endif // !DCHECK_IS_ON()
+
+-LeafPageDecoder::LeafPageDecoder(DatabasePageReader* db_reader) noexcept
+- : page_id_(db_reader->page_id()),
+- db_reader_(db_reader),
+- cell_count_(ComputeCellCount(db_reader)),
+- next_read_index_(0),
+- last_record_size_(0) {
++void LeafPageDecoder::Initialize(DatabasePageReader* db_reader) {
++ DCHECK(db_reader);
+ DCHECK(IsOnValidPage(db_reader));
++ page_id_ = db_reader->page_id();
++ db_reader_ = db_reader;
++ cell_count_ = ComputeCellCount(db_reader);
++ next_read_index_ = 0;
++ last_record_size_ = 0;
+ DCHECK(DatabasePageReader::IsValidPageId(page_id_));
+ }
+
++void LeafPageDecoder::Reset() {
++ db_reader_ = nullptr;
++ page_id_ = 0;
++ cell_count_ = 0;
++ next_read_index_ = 0;
++ last_record_size_ = 0;
++}
++
+ bool LeafPageDecoder::TryAdvance() {
+ DCHECK_CALLED_ON_VALID_SEQUENCE(sequence_checker_);
+ DCHECK(CanAdvance());
+diff --git a/sql/recover_module/btree.h b/sql/recover_module/btree.h
+index d76d076..33114b0 100644
+--- a/sql/recover_module/btree.h
++++ b/sql/recover_module/btree.h
+@@ -102,7 +102,7 @@
+ //
+ // |db_reader| must have been used to read an inner page of a table B-tree.
+ // |db_reader| must outlive this instance.
+- explicit LeafPageDecoder(DatabasePageReader* db_reader) noexcept;
++ explicit LeafPageDecoder() noexcept = default;
+ ~LeafPageDecoder() noexcept = default;
+
+ LeafPageDecoder(const LeafPageDecoder&) = delete;
+@@ -150,6 +150,15 @@
+ // read as long as CanAdvance() returns true.
+ bool TryAdvance();
+
++ // Initialize with DatabasePageReader
++ void Initialize(DatabasePageReader* db_reader);
++
++ // Reset internal DatabasePageReader
++ void Reset();
++
++ // True if DatabasePageReader is valid
++ bool IsValid() { return (db_reader_ != nullptr); }
++
+ // True if the given reader may point to an inner page in a table B-tree.
+ //
+ // The last ReadPage() call on |db_reader| must have succeeded.
+@@ -163,14 +172,14 @@
+ static int ComputeCellCount(DatabasePageReader* db_reader);
+
+ // The number of the B-tree page this reader is reading.
+- const int64_t page_id_;
++ int64_t page_id_;
+ // Used to read the tree page.
+ //
+ // Raw pointer usage is acceptable because this instance's owner is expected
+ // to ensure that the DatabasePageReader outlives this.
+- DatabasePageReader* const db_reader_;
++ DatabasePageReader* db_reader_;
+ // Caches the ComputeCellCount() value for this reader's page.
+- const int cell_count_ = ComputeCellCount(db_reader_);
++ int cell_count_;
+
+ // The reader's cursor state.
+ //
+diff --git a/sql/recover_module/cursor.cc b/sql/recover_module/cursor.cc
+index 0029ff9..42548bc 100644
+--- a/sql/recover_module/cursor.cc
++++ b/sql/recover_module/cursor.cc
+@@ -26,7 +26,7 @@
+ int VirtualCursor::First() {
+ DCHECK_CALLED_ON_VALID_SEQUENCE(sequence_checker_);
+ inner_decoders_.clear();
+- leaf_decoder_ = nullptr;
++ leaf_decoder_.Reset();
+
+ AppendPageDecoder(table_->root_page_id());
+ return Next();
+@@ -36,18 +36,18 @@
+ DCHECK_CALLED_ON_VALID_SEQUENCE(sequence_checker_);
+ record_reader_.Reset();
+
+- while (!inner_decoders_.empty() || leaf_decoder_.get()) {
+- if (leaf_decoder_.get()) {
+- if (!leaf_decoder_->CanAdvance()) {
++ while (!inner_decoders_.empty() || leaf_decoder_.IsValid()) {
++ if (leaf_decoder_.IsValid()) {
++ if (!leaf_decoder_.CanAdvance()) {
+ // The leaf has been exhausted. Remove it from the DFS stack.
+- leaf_decoder_ = nullptr;
++ leaf_decoder_.Reset();
+ continue;
+ }
+- if (!leaf_decoder_->TryAdvance())
++ if (!leaf_decoder_.TryAdvance())
+ continue;
+
+- if (!payload_reader_.Initialize(leaf_decoder_->last_record_size(),
+- leaf_decoder_->last_record_offset())) {
++ if (!payload_reader_.Initialize(leaf_decoder_.last_record_size(),
++ leaf_decoder_.last_record_offset())) {
+ continue;
+ }
+ if (!record_reader_.Initialize())
+@@ -99,13 +99,13 @@
+ int64_t VirtualCursor::RowId() {
+ DCHECK_CALLED_ON_VALID_SEQUENCE(sequence_checker_);
+ DCHECK(record_reader_.IsInitialized());
+- DCHECK(leaf_decoder_.get());
+- return leaf_decoder_->last_record_rowid();
++ DCHECK(leaf_decoder_.IsValid());
++ return leaf_decoder_.last_record_rowid();
+ }
+
+ void VirtualCursor::AppendPageDecoder(int page_id) {
+ DCHECK_CALLED_ON_VALID_SEQUENCE(sequence_checker_);
+- DCHECK(leaf_decoder_.get() == nullptr)
++ DCHECK(!leaf_decoder_.IsValid())
+ << __func__
+ << " must only be called when the current path has no leaf decoder";
+
+@@ -113,7 +113,7 @@
+ return;
+
+ if (LeafPageDecoder::IsOnValidPage(&db_reader_)) {
+- leaf_decoder_ = std::make_unique<LeafPageDecoder>(&db_reader_);
++ leaf_decoder_.Initialize(&db_reader_);
+ return;
+ }
+
+diff --git a/sql/recover_module/cursor.h b/sql/recover_module/cursor.h
+index afcd690..b15c31d 100644
+--- a/sql/recover_module/cursor.h
++++ b/sql/recover_module/cursor.h
+@@ -129,7 +129,7 @@
+ std::vector<std::unique_ptr<InnerPageDecoder>> inner_decoders_;
+
+ // Decodes the leaf page containing records.
+- std::unique_ptr<LeafPageDecoder> leaf_decoder_;
++ LeafPageDecoder leaf_decoder_;
+
+ SEQUENCE_CHECKER(sequence_checker_);
+ };
+diff --git a/sql/recover_module/pager.cc b/sql/recover_module/pager.cc
+index 58e75de..5fe9620 100644
+--- a/sql/recover_module/pager.cc
++++ b/sql/recover_module/pager.cc
+@@ -23,8 +23,7 @@
+ "ints are not appropriate for representing page IDs");
+
+ DatabasePageReader::DatabasePageReader(VirtualTable* table)
+- : page_data_(std::make_unique<uint8_t[]>(table->page_size())),
+- table_(table) {
++ : page_data_(), table_(table) {
+ DCHECK(table != nullptr);
+ DCHECK(IsValidPageSize(table->page_size()));
+ }
+@@ -57,8 +56,8 @@
+ std::numeric_limits<int64_t>::max(),
+ "The |read_offset| computation above may overflow");
+
+- int sqlite_status =
+- RawRead(sqlite_file, read_size, read_offset, page_data_.get());
++ int sqlite_status = RawRead(sqlite_file, read_size, read_offset,
++ const_cast<uint8_t*>(page_data_.data()));
+
+ // |page_id_| needs to be set to kInvalidPageId if the read failed.
+ // Otherwise, future ReadPage() calls with the previous |page_id_| value
+diff --git a/sql/recover_module/pager.h b/sql/recover_module/pager.h
+index 0e388ddc..99314e3 100644
+--- a/sql/recover_module/pager.h
++++ b/sql/recover_module/pager.h
+@@ -5,6 +5,7 @@
+ #ifndef SQL_RECOVER_MODULE_PAGER_H_
+ #define SQL_RECOVER_MODULE_PAGER_H_
+
++#include <array>
+ #include <cstdint>
+ #include <memory>
+
+@@ -70,7 +71,7 @@
+ DCHECK_CALLED_ON_VALID_SEQUENCE(sequence_checker_);
+ DCHECK_NE(page_id_, kInvalidPageId)
+ << "Successful ReadPage() required before accessing pager state";
+- return page_data_.get();
++ return page_data_.data();
+ }
+
+ // The number of bytes in the page read by the last ReadPage() call.
+@@ -137,7 +138,7 @@
+ int page_id_ = kInvalidPageId;
+ // Stores the bytes of the last page successfully read by ReadPage().
+ // The content is undefined if the last call to ReadPage() did not succeed.
+- const std::unique_ptr<uint8_t[]> page_data_;
++ const std::array<uint8_t, kMaxPageSize> page_data_;
+ // Raw pointer usage is acceptable because this instance's owner is expected
+ // to ensure that the VirtualTable outlives this.
+ VirtualTable* const table_;
generated by cgit v1.2.1 (git 2.18.0) at 2024-11-25 05:42:23 +0000