This change adds delete, clear, serialize, parse, copy_from, and merge_from
operations to the runtime. Since these operations can all be implemented easily
on the `MessageLite` interface, we can use a common implementation in the
runtime instead of generating per-message thunks for all of these.
I suspect this will also make it possible to remove some of our generated trait
implementations and replace them with blanket implementations, but I will leave
that for a future change.
PiperOrigin-RevId: 665910927
Migrate ::hpb::internal::GetMiniTable to ::hpb::interop::upb::GetMiniTable
hpb.h now shows signs of backend-awareness, #including upb.h if the backend is known to be upb. If no backend is picked, we error out at this time since we solely support upb.
ClearMessage has been migrated to backend-aware hpb.
PiperOrigin-RevId: 665527832
We can use memset for zero initialized objects, and memcpy for ones cloned from the prototype.
This permits creating objects from the parser without calling virtual functions.
For the cases where the efficient implementation can't be used, we generate a "placement new" style function to offload the memory allocation out of the code generation. This reduces code bloat even when we can't use the more efficient implementation.
Migrate many callers of `New` and similar to the new functionality. In particular, the parsing paths will use this.
Finally, make `New` non-virtual now that `MessageLite` can handle it directly. It reduces binary size.
PiperOrigin-RevId: 665411723
Fixes the warning:
```
warning: a function declaration without a prototype is deprecated in all versions of C [-Wstrict-prototypes]
extern const upb_MiniTable* google__protobuf__OneofDescriptorProto_msg_init();
^
void
```
PiperOrigin-RevId: 664971019
Our bootstrapping setup compiles multiple versions of the generated code for `descriptor.proto` and `plugin.proto`, one for each stage of the bootstrap. For source files (`.c`), we can always select the correct version of the file in the BUILD rules, but for header files we need to make sure the correct stage's file is always selected via `#include`.
Previously we used `cc_library(includes=[])` to make it appear as though our bootstrapped headers had the same names as the "real" headers. This allowed a lot of the code to be agnostic to whether a bootstrap header was being used, which simplified things because we did not have to change the code performing the `#include`.
Unfortunately, due to build system limitations, this sometimes led to the incorrect header getting included. This should not have been possible, because we had a clean BUILD graph that should have removed all ambiguity about which header should be available. But in non-sandboxed builds, the compiler was able to find headers that were not actually in `deps=[]`, and worse it preferred those headers over the headers that actually were in `deps=[]`. This led to unintended results and errors about layering check violations.
This CL fixes the problem by removing all use of `includes=[]`. We now spell a full pathname to all bootstrap headers, so this class of errors is no longer possible. Unfortunately this adds some complexity, as we have to hard-code these full paths in several places.
A nice improvement in this CL is that `bootstrap_upb_proto_library()` can now only be used for bootstrapping; it only exposes the `descriptor_bootstrap.h` / `plugin_bootstrap.h` files. Anyone wanting to use the normal `net/proto2/proto/descriptor.upb.h` file should depend on `//net/proto2/proto:descriptor_upb_c_proto` target instead.
PiperOrigin-RevId: 664953196
Using `field.full_name()` instead of constructing a thunk name based on the containing_type makes little difference for normal fields, but it will actually be unique for extension fields, whereas the prior approach would break if an extension field name and a regular field collided (or if 2 extensions for the same message had field names that collided).
PiperOrigin-RevId: 664910530
This builds off of our existing pattern for unused imports. We will still warn when any deprecated features are used in a proto file passed directly to protoc, but will avoid them in the following situations:
1) Transitive imports pulled from the filesystem or descriptors will not trigger warnings. This will keep warnings isolated to the upstream builds instead of alerting all downstream clients.
2) Dynamic pool builds will not log deprecation warnings by default.
PiperOrigin-RevId: 663396953
Since a group GPBUnknownField uses a GPBUnknownFields and that is mutable, it needs to be copied so two instances aren't linked.
PiperOrigin-RevId: 663323972
Joshua Haberman
Protobuf Team Bot
Protobuf Team Bot
Hong Shin
Adam Cozzette
Mike Kruskal
Brent Shaffer
Jie Luo
Tony Liao
Yamil Morales
Thomas Van Lenten
David Smith