This works for both built-in generators and plugins written in C++. Any feature extensions specified by this virtual method will end up fully resolved in the descriptors.
PiperOrigin-RevId: 561446773
This is predominantly a wrapper around `BytesMut`, for simplicity.
Bytes and string fields are mostly the same, except for possible UTF-8 handling.
This also implements some minor parts of `ProtoStr` that were missed.
PiperOrigin-RevId: 561422951
Currently wasted space includes ArenaBlock header (24 bytes),
and never can be 0 even if blocks are used optimally.
Report 0 wasted space if blocks are used optimally.
PiperOrigin-RevId: 561347182
Removes 1 virtual function from each Message type.
We keep the codegen for GetCachedSize+SetCachedSize to allow for non-virtual dispatch for those calls, but they are not overriding a virtual function.
PiperOrigin-RevId: 561052979
This branch is only for `!using_sso()`. That means that:
- `old_tagged_ptr` has low bit is set to 1
- `old_tagged_ptr` points to allocated `Rep` structure
Both facts suggest that `old_tagged_ptr` cannot be equal to nullptr.
PiperOrigin-RevId: 560704777
This change significantly reduces the code size for large enums and improves
performance by reducing cache misses and branch mispredictions.
Change the table-driven parser to use these tables instead of going through the _IsValid functions. This avoids indirect function calls in the parser.
PiperOrigin-RevId: 560179698
On the read side avoid writing to memory via volatile. The volatile access will generate its own tsan checks because it is touching memory.
On the write side also avoid the volatile access by unconditionally writing to the memory. The address used for the tsan validation is dedicated for it so it doesn't matter if we write arbitrary values to it.
PiperOrigin-RevId: 559841351
This allows the compiler to statically detect use-after-free bugs.
This change touches a subset of field types. More changes to follow.
PiperOrigin-RevId: 559832961
- `generate_minimal_imports` is now `yes`, this reduces the imports generated
into the generated source.
- `headers_use_forward_declarations` is now `no`; this causes the generated
.pbobj.h files to directly import all the headers needed to define types used by
this types defined in the file. This provides better compatibility for Swift
interop especially when the ObjC protos are used in multiple libraries as
forward declarations can cause issues for importing into Swift.
If you need to override either options, please open an issue on github to report
the reason. A future release of the library will remove these options locking in
the new behaviors.
PiperOrigin-RevId: 559737716
This places all of the tricky reflection logic of feature resolution into a single location that outputs a portable protobuf message. With this message, feature resolution becomes drastically simpler and easy to reimplement in other languages.
Follow-up changes will provide:
- An API to specify generator features from the CodeGenerator class for C++ plugins
- A CLI for building these default mappings
- Bazel/CMake rules to help embed these mappings in target languages (i.e. for runtimes and non-C++ plugins)
PiperOrigin-RevId: 559615720
Disable the alignment check in 32-bit msvc.
This toolchain has a difference between "natural" and "required" alignment of
types and it can have the alignment of members of type `T` to be smaller than
`alignof(T)`.
Also, disable AnyTest.TestPackFromSerializationExceedsSizeLimit there because it can't allocate that much memory.
PiperOrigin-RevId: 559495544
This makes a few changes:
- It changes generated messages to reference message innards as a type in `__runtime` instead of branching on what fields should be there. That results in much less bifurcation in gencode and lets runtime-agnostic code reference raw message innards.
- It adds a generic mechanism for creating vtable-based mutators. These vtables point to thunks generated for interacting with C++ or upb fields. Right now, the design results in 2-word (msg+vtable) mutators for C++ and 3-word mutators (msg+arena+vtable) for UPB. See upb.rs for an explanation of the design options. I chose the `RawMessage+&Arena` design for mutator data as opposed to a `&MessageInner` design because it did not result in extra-indirection layout changes for message mutators. We could revisit this in the future with performance data, since this results in all field mutators being 3 words large instead of the register-friendly 2 words.
- And lastly, as a nearby change that touches on many of the same topics, it adds some extra SAFETY comments for Send/Sync in message gencode.
PiperOrigin-RevId: 559483437
This fixes Python/C++ and upb, and pushes the buggy behavior to pure python. There, it's very difficult to handle options on the bootstrapped proto with the current architecture. Future changes will attempt to address this more isolated issue.
PiperOrigin-RevId: 559450900
This will be used to seed feature resolution, which becomes just an edition lookup followed by proto merges. Runtime and generators that need to resolve their own features will be able to leverage this to avoid reimplementing all of the reflective logic that goes into the default calculation.
PiperOrigin-RevId: 559271634
Mike Kruskal
Protobuf Team Bot
Alyssa Haroldsen
Protobuf Team Bot
Jie Luo
Hong Shin
Matt Kulukundis
Martijn Vels
Sandy Zhang
Thomas Van Lenten