From 846cdbdbf965fc50478bcc4c6436e3dc6a489f3f Mon Sep 17 00:00:00 2001 From: Chris Xiong Date: Thu, 14 Oct 2021 19:01:18 -0400 Subject: Initial commit. --- .../files/chromium-94-sql-virtual-cursor.patch | 216 +++++++++++++++++++++ 1 file changed, 216 insertions(+) create mode 100644 www-client/chromium/files/chromium-94-sql-virtual-cursor.patch (limited to 'www-client/chromium/files/chromium-94-sql-virtual-cursor.patch') diff --git a/www-client/chromium/files/chromium-94-sql-virtual-cursor.patch b/www-client/chromium/files/chromium-94-sql-virtual-cursor.patch new file mode 100644 index 0000000..47b276d --- /dev/null +++ b/www-client/chromium/files/chromium-94-sql-virtual-cursor.patch @@ -0,0 +1,216 @@ +diff --git a/sql/recover_module/btree.cc b/sql/recover_module/btree.cc +index cc9420e5c..62fcaaf79 100644 +--- a/sql/recover_module/btree.cc ++++ b/sql/recover_module/btree.cc +@@ -136,16 +136,25 @@ static_assert(std::is_trivially_destructible::value, + "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 eaa087a5c..78ce00e05 100644 +--- a/sql/recover_module/btree.h ++++ b/sql/recover_module/btree.h +@@ -103,7 +103,7 @@ class LeafPageDecoder { + // + // |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; +@@ -151,6 +151,15 @@ class LeafPageDecoder { + // 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. +@@ -164,14 +173,14 @@ class LeafPageDecoder { + 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 4f827edf1..240de4999 100644 +--- a/sql/recover_module/cursor.cc ++++ b/sql/recover_module/cursor.cc +@@ -28,7 +28,7 @@ VirtualCursor::~VirtualCursor() { + 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(); +@@ -38,18 +38,18 @@ int VirtualCursor::Next() { + 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()) +@@ -101,13 +101,13 @@ int VirtualCursor::ReadColumn(int column_index, + 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"; + +@@ -115,7 +115,7 @@ void VirtualCursor::AppendPageDecoder(int page_id) { + return; + + if (LeafPageDecoder::IsOnValidPage(&db_reader_)) { +- leaf_decoder_ = std::make_unique(&db_reader_); ++ leaf_decoder_.Initialize(&db_reader_); + return; + } + +diff --git a/sql/recover_module/cursor.h b/sql/recover_module/cursor.h +index afcd6900e..b15c31d42 100644 +--- a/sql/recover_module/cursor.h ++++ b/sql/recover_module/cursor.h +@@ -129,7 +129,7 @@ class VirtualCursor { + std::vector> inner_decoders_; + + // Decodes the leaf page containing records. +- std::unique_ptr leaf_decoder_; ++ LeafPageDecoder leaf_decoder_; + + SEQUENCE_CHECKER(sequence_checker_); + }; +diff --git a/sql/recover_module/pager.cc b/sql/recover_module/pager.cc +index 58e75de27..5fe96204e 100644 +--- a/sql/recover_module/pager.cc ++++ b/sql/recover_module/pager.cc +@@ -23,8 +23,7 @@ static_assert(DatabasePageReader::kMaxPageId <= std::numeric_limits::max(), + "ints are not appropriate for representing page IDs"); + + DatabasePageReader::DatabasePageReader(VirtualTable* table) +- : page_data_(std::make_unique(table->page_size())), +- table_(table) { ++ : page_data_(), table_(table) { + DCHECK(table != nullptr); + DCHECK(IsValidPageSize(table->page_size())); + } +@@ -57,8 +56,8 @@ int DatabasePageReader::ReadPage(int page_id) { + std::numeric_limits::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(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 5976d2167..8dcffa3f2 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 + #include + #include + #include +@@ -71,7 +72,7 @@ class DatabasePageReader { + 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. +@@ -138,7 +139,7 @@ class DatabasePageReader { + 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 page_data_; ++ const std::array page_data_; + // Raw pointer usage is acceptable because this instance's owner is expected + // to ensure that the VirtualTable outlives this. + VirtualTable* const table_; -- cgit v1.2.3