diff options
Diffstat (limited to 'www-client/chromium/files/chromium-103-VirtualCursor-std-layout.patch')
| -rw-r--r-- | www-client/chromium/files/chromium-103-VirtualCursor-std-layout.patch | 231 |
1 files changed, 231 insertions, 0 deletions
diff --git a/www-client/chromium/files/chromium-103-VirtualCursor-std-layout.patch b/www-client/chromium/files/chromium-103-VirtualCursor-std-layout.patch new file mode 100644 index 0000000..be0502e --- /dev/null +++ b/www-client/chromium/files/chromium-103-VirtualCursor-std-layout.patch @@ -0,0 +1,231 @@ +From 144479ad7b4287bee4067f95e4218f614798a865 Mon Sep 17 00:00:00 2001 +From: Stephan Hartmann <stha09@googlemail.com> +Date: Sun, 16 Jan 2022 19:15:26 +0000 +Subject: [PATCH] sql: make VirtualCursor standard layout type + +sql::recover::VirtualCursor needs to be a standard layout type, but +has members of type std::unique_ptr. However, std::unique_ptr is not +guaranteed to be standard layout. Compiling with clang combined with +gcc-11 libstdc++ fails because of this. + +Bug: 1189788 +Change-Id: Ia6dc388cc5ef1c0f2afc75f8ca45b9f12687ca9c +--- + +diff --git a/sql/recover_module/btree.cc b/sql/recover_module/btree.cc +index cc9420e5..f12d8fa 100644 +--- a/sql/recover_module/btree.cc ++++ b/sql/recover_module/btree.cc +@@ -136,16 +136,22 @@ + "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) { ++LeafPageDecoder::LeafPageDecoder() noexcept = default; ++ ++void LeafPageDecoder::Initialize(DatabasePageReader* 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(IsOnValidPage(db_reader)); + DCHECK(DatabasePageReader::IsValidPageId(page_id_)); + } + ++void LeafPageDecoder::Reset() { ++ db_reader_ = nullptr; ++} ++ + 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 eaa087a5..df0e0c9 100644 +--- a/sql/recover_module/btree.h ++++ b/sql/recover_module/btree.h +@@ -101,9 +101,7 @@ + public: + // Creates a decoder for a DatabasePageReader's last read page. + // +- // |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; ++ LeafPageDecoder() noexcept; + ~LeafPageDecoder() noexcept = default; + + LeafPageDecoder(const LeafPageDecoder&) = delete; +@@ -151,6 +149,17 @@ + // read as long as CanAdvance() returns true. + bool TryAdvance(); + ++ // Initialize with DatabasePageReader ++ // |db_reader| must have been used to read an inner page of a table B-tree. ++ // |db_reader| must outlive this instance. ++ 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 @@ + 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 4f827ed..240de499 100644 +--- a/sql/recover_module/cursor.cc ++++ b/sql/recover_module/cursor.cc +@@ -28,7 +28,7 @@ + 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(); +@@ -38,18 +38,18 @@ + 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()) +@@ -101,13 +101,13 @@ + 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"; + +@@ -115,7 +115,7 @@ + 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 845b785..cc4e85f8 100644 +--- a/sql/recover_module/cursor.h ++++ b/sql/recover_module/cursor.h +@@ -130,7 +130,7 @@ + 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..69d98cef 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->page_size()), table_(table) { + DCHECK(table != nullptr); + DCHECK(IsValidPageSize(table->page_size())); + } +@@ -58,7 +57,7 @@ + "The |read_offset| computation above may overflow"); + + int sqlite_status = +- RawRead(sqlite_file, read_size, read_offset, page_data_.get()); ++ RawRead(sqlite_file, read_size, read_offset, 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 07cac3cb..d08f093 100644 +--- a/sql/recover_module/pager.h ++++ b/sql/recover_module/pager.h +@@ -6,8 +6,8 @@ + #define SQL_RECOVER_MODULE_PAGER_H_ + + #include <cstdint> +-#include <memory> + #include <ostream> ++#include <vector> + + #include "base/check_op.h" + #include "base/memory/raw_ptr.h" +@@ -72,7 +72,7 @@ + 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. +@@ -139,7 +139,7 @@ + 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_; ++ std::vector<uint8_t> page_data_; + // Raw pointer usage is acceptable because this instance's owner is expected + // to ensure that the VirtualTable outlives this. + const raw_ptr<VirtualTable> table_; |