| # Copyright (C) 2017 The Android Open Source Project |
| # |
| # Licensed under the Apache License, Version 2.0 (the "License"); |
| # you may not use this file except in compliance with the License. |
| # You may obtain a copy of the License at |
| # |
| # http://www.apache.org/licenses/LICENSE-2.0 |
| # |
| # Unless required by applicable law or agreed to in writing, software |
| # distributed under the License is distributed on an "AS IS" BASIS, |
| # WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
| # See the License for the specific language governing permissions and |
| # limitations under the License. |
| |
| import("perfetto.gni") |
| import("perfetto_component.gni") |
| |
| # This gni file defines rules for proto generation. There are various types of |
| # proto targets that can be defined in our codebase: |
| # "lite" targets: these use the standard libprotobuf library. They are used |
| # mainly for tests and readback. |
| # "zero" targets: these use the protozero library and its protoc plugin. They |
| # are used pretty much everywhere. |
| # "descriptor" targets: they are used to generate a proto-encoded reflection |
| # descriptor that describes the schema of the proto using protobuf itself. |
| # All these targets can be generated using the perfetto_proto_library rule. It |
| # wraps the instantiation of several proto targets using a convenience template. |
| # |
| # For instance: |
| # perfetto_proto_library("xxx_@TYPE@") { |
| # proto_generators = [ "lite", "zero" ] # lite+zero+cpp is the default value. |
| # sources = [ "one.proto", "two.proto" ] |
| # deps = [ "dep:@TYPE@" ] |
| # } |
| # |
| # Is the equivalent of: |
| # proto_library("xxx_lite") { sources = [...], deps = [ "dep:lite"] } |
| # protozero_library("xxx_zero") { sources = [...], deps = [ "dep:zero"] } |
| |
| # Load the protobuf's proto_library() definition. |
| if (!defined(perfetto_protobuf_target_prefix)) { |
| if (perfetto_root_path == "//") { |
| perfetto_protobuf_target_prefix = "//buildtools" |
| } else { |
| perfetto_protobuf_target_prefix = "//third_party/protobuf" |
| } |
| } |
| if (!defined(perfetto_protobuf_gni)) { |
| if (perfetto_root_path == "//") { |
| perfetto_protobuf_gni = "//gn/standalone/proto_library.gni" |
| } else { |
| perfetto_protobuf_gni = "//third_party/protobuf/proto_library.gni" |
| } |
| } |
| if (!defined(perfetto_protobuf_src_dir)) { |
| if (perfetto_root_path == "//") { |
| perfetto_protobuf_src_dir = "//buildtools/protobuf/src" |
| } else { |
| perfetto_protobuf_src_dir = "//third_party/protobuf/src" |
| } |
| } |
| import(perfetto_protobuf_gni) |
| |
| # Equivalent to proto_library (generation of .h/.cc from .proto files) but |
| # enables also generation using the protozero plugin. |
| # The generated files will have the .pbzero.{cc,h} suffix, as opposed to the |
| # .pb.{cc,h} of the official proto library. |
| # DO NOT use this target directly, use perfetto_proto_library() below. |
| template("protozero_library") { |
| proto_library(target_name) { |
| perfetto_root_path = invoker.perfetto_root_path |
| |
| generate_cc = false |
| generate_python = false |
| generator_plugin_label = |
| perfetto_root_path + "src/protozero/protoc_plugin:protozero_plugin" |
| generator_plugin_suffix = ".pbzero" |
| if (build_with_chromium) { |
| component_build_force_source_set = true |
| } |
| |
| if (defined(invoker.deps)) { |
| deps = invoker.deps |
| } else { |
| deps = [] |
| } |
| |
| # omit_protozero_dep is intended to be used when protozero_library |
| # is used in Chrome (for generation of code for proto extensions) |
| # to avoid ODR violations in case of component builds. The embedder |
| # (Chrome) is then responsible for adding the appropriate transitive |
| # dependency on Protozero. |
| # |
| # TODO(b/173041866): use fine-grained components instead when available |
| if (!(defined(invoker.omit_protozero_dep) && invoker.omit_protozero_dep)) { |
| deps += [ perfetto_root_path + "src/protozero" ] |
| } |
| |
| forward_variables_from(invoker, |
| [ |
| "defines", |
| "generator_plugin_options", |
| "include_dirs", |
| "proto_in_dir", |
| "proto_out_dir", |
| "sources", |
| "testonly", |
| "visibility", |
| "generate_descriptor", |
| "propagate_imports_configs", |
| "import_dirs", |
| ]) |
| } |
| } |
| |
| # This template generates .gen.cc/h files from .proto files. The generated |
| # sources are actual C++ classes that can be moved and copied around, very |
| # similar to the libprotobuf generated ones API-wise, but use protozero under |
| # the hoods, without any zero-copy benefit though. |
| # They are mainly used for the perfetto IPC layer and tests. |
| template("protozero_cpp_library") { |
| proto_library(target_name) { |
| perfetto_root_path = invoker.perfetto_root_path |
| |
| generate_cc = false |
| generate_python = false |
| generator_plugin_label = |
| perfetto_root_path + "src/protozero/protoc_plugin:cppgen_plugin" |
| generator_plugin_suffix = ".gen" |
| if (build_with_chromium) { |
| component_build_force_source_set = true |
| } |
| |
| deps = [ |
| "$perfetto_root_path/gn:default_deps", |
| "$perfetto_root_path/include/perfetto/base", |
| "$perfetto_root_path/src/protozero", |
| ] |
| |
| if (defined(invoker.deps)) { |
| deps += invoker.deps |
| } |
| |
| forward_variables_from(invoker, |
| [ |
| "defines", |
| "generator_plugin_options", |
| "include_dirs", |
| "proto_in_dir", |
| "proto_out_dir", |
| "sources", |
| "testonly", |
| "visibility", |
| "generate_descriptor", |
| "propagate_imports_configs", |
| "import_dirs", |
| ]) |
| } |
| } |
| |
| # Generates .ipc.{h,cc} stubs for IPC services defined in .proto files. |
| template("ipc_library") { |
| proto_library(target_name) { |
| perfetto_root_path = invoker.perfetto_root_path |
| generate_cc = false |
| generate_python = false |
| generator_plugin_label = |
| "$perfetto_root_path/src/ipc/protoc_plugin:ipc_plugin" |
| generator_plugin_suffix = ".ipc" |
| deps = [ "$perfetto_root_path/gn:default_deps" ] |
| if (perfetto_component_type == "static_library") { |
| deps += [ "$perfetto_root_path/src/ipc:perfetto_ipc" ] |
| } else { |
| deps += [ "$perfetto_root_path/src/ipc:common" ] |
| } |
| if (is_win) { |
| # TODO(primiano): investigate this. In Windows standalone builds, some |
| # executable targets end up in a state where no code pulls a dep on the |
| # ipc:client (in turn that seems a subtle consequence of not having |
| # traced_probes on Windows). This dep here is effectively needed because |
| # the client-side code in the generated .ipc.cc effectively depends on the |
| # client-side IPC library. Perhaps we just should do this unconditionally |
| # on all platforms? |
| deps += [ "$perfetto_root_path/src/ipc:client" ] |
| } |
| |
| if (defined(invoker.deps)) { |
| deps += invoker.deps |
| } |
| forward_variables_from(invoker, |
| [ |
| "defines", |
| "extra_configs", |
| "include_dirs", |
| "proto_in_dir", |
| "proto_out_dir", |
| "generator_plugin_options", |
| "sources", |
| "testonly", |
| "visibility", |
| "propagate_imports_configs", |
| "import_dirs", |
| ]) |
| } |
| } |
| |
| # Generates .grpc.{h,cc} stubs for services defined in .proto files. |
| # We require explicit opt-in as gRPC is very heavyweight so we do not |
| # want accidental dependencies on this. |
| if (enable_perfetto_grpc) { |
| template("perfetto_grpc_library") { |
| proto_library(target_name) { |
| proto_in_dir = perfetto_root_path |
| proto_out_dir = perfetto_root_path |
| propagate_imports_configs = false |
| |
| perfetto_root_path = perfetto_root_path |
| generate_cc = false |
| generate_python = false |
| generator_plugin_label = |
| "$perfetto_root_path/buildtools/grpc:grpc_cpp_plugin" |
| generator_plugin_suffix = ".grpc.pb" |
| deps = [ "$perfetto_root_path/buildtools/grpc:grpc++" ] |
| public_configs = [ "$perfetto_root_path/buildtools:grpc_gen_config" ] |
| if (defined(invoker.deps)) { |
| deps += invoker.deps |
| } |
| forward_variables_from(invoker, |
| [ |
| "defines", |
| "extra_configs", |
| "include_dirs", |
| "sources", |
| "testonly", |
| "visibility", |
| ]) |
| } |
| } |
| } |
| |
| # The template used everywhere in the codebase. |
| template("perfetto_proto_library") { |
| if (defined(invoker.proto_generators)) { |
| proto_generators = invoker.proto_generators |
| } else { |
| proto_generators = [ |
| "zero", |
| "lite", |
| "cpp", |
| "source_set", |
| ] |
| } |
| |
| # proto imports and C++ #includes are relative to this path. |
| if (defined(invoker.proto_path)) { |
| proto_path = invoker.proto_path |
| } else { |
| proto_path = perfetto_root_path |
| } |
| |
| if (defined(invoker.import_dirs)) { |
| import_dirs_ = invoker.import_dirs |
| } else { |
| import_dirs_ = [] |
| } |
| |
| vars_to_forward = [ |
| "sources", |
| "visibility", |
| "testonly", |
| "exclude_imports", |
| ] |
| expansion_token = "@TYPE@" |
| |
| # gn:public_config propagates the gen dir as include directory. We |
| # disable the proto_library's public_config to avoid duplicate include |
| # directory command line flags (crbug.com/1043279, crbug.com/gn/142). |
| propagate_imports_configs_ = false |
| |
| foreach(gen_type, proto_generators) { |
| target_name_ = string_replace(target_name, expansion_token, gen_type) |
| |
| # Translate deps from xxx:@TYPE@ to xxx:lite/zero. |
| deps_ = [] |
| if (defined(invoker.deps)) { |
| foreach(dep, invoker.deps) { |
| deps_ += [ string_replace(dep, expansion_token, gen_type) ] |
| } |
| } |
| |
| # The distinction between deps and public_deps does not matter for GN |
| # but Bazel cares about the difference so we distinguish between the two. |
| public_deps_ = [] |
| if (defined(invoker.public_deps)) { |
| foreach(dep, invoker.public_deps) { |
| public_deps_ = [ string_replace(dep, expansion_token, gen_type) ] |
| } |
| } |
| deps_ += public_deps_ |
| |
| if (gen_type == "zero") { |
| protozero_library(target_name_) { |
| proto_in_dir = proto_path |
| proto_out_dir = proto_path |
| generator_plugin_options = "wrapper_namespace=pbzero" |
| deps = deps_ |
| propagate_imports_configs = propagate_imports_configs_ |
| import_dirs = import_dirs_ |
| forward_variables_from(invoker, vars_to_forward) |
| } |
| } else if (gen_type == "cpp") { |
| protozero_cpp_library(target_name_) { |
| proto_in_dir = proto_path |
| proto_out_dir = proto_path |
| generator_plugin_options = "wrapper_namespace=gen" |
| deps = deps_ |
| propagate_imports_configs = propagate_imports_configs_ |
| import_dirs = import_dirs_ |
| forward_variables_from(invoker, vars_to_forward) |
| } |
| } else if (gen_type == "ipc") { |
| cpp_target_name_ = string_replace(target_name, expansion_token, "cpp") |
| ipc_library(target_name_) { |
| proto_in_dir = proto_path |
| proto_out_dir = proto_path |
| generator_plugin_options = "wrapper_namespace=gen" |
| deps = deps_ + [ ":$cpp_target_name_" ] |
| propagate_imports_configs = propagate_imports_configs_ |
| import_dirs = import_dirs_ |
| forward_variables_from(invoker, vars_to_forward) |
| } |
| } else if (gen_type == "lite") { |
| proto_library(target_name_) { |
| proto_in_dir = proto_path |
| proto_out_dir = proto_path |
| generate_python = false |
| deps = deps_ |
| cc_generator_options = "lite=true:" |
| propagate_imports_configs = propagate_imports_configs_ |
| import_dirs = import_dirs_ |
| forward_variables_from(invoker, vars_to_forward) |
| } |
| } else if (gen_type == "descriptor") { |
| proto_library(target_name_) { |
| proto_in_dir = proto_path |
| proto_out_dir = proto_path |
| generate_python = false |
| generate_cc = false |
| generate_descriptor = |
| rebase_path(invoker.generate_descriptor, proto_path) |
| deps = deps_ |
| import_dirs = import_dirs_ |
| forward_variables_from(invoker, vars_to_forward) |
| } |
| |
| # Not needed for descriptor proto_library target. |
| not_needed([ "propagate_imports_configs_" ]) |
| } else if (gen_type == "source_set") { |
| action(target_name_) { |
| out_path = "$target_gen_dir/" + target_name_ |
| rebased_out_path = |
| rebase_path(target_gen_dir, root_build_dir) + "/" + target_name_ |
| |
| script = "$perfetto_root_path/tools/touch_file.py" |
| args = [ |
| "--output", |
| rebased_out_path, |
| ] |
| outputs = [ out_path ] |
| deps = deps_ |
| |
| metadata = { |
| proto_library_sources = invoker.sources |
| proto_import_dirs = import_dirs_ |
| exports = get_path_info(public_deps_, "abspath") |
| } |
| forward_variables_from(invoker, vars_to_forward) |
| } |
| |
| # Not needed for source_set proto_library target. |
| not_needed([ |
| "propagate_imports_configs_", |
| "proto_path", |
| ]) |
| } else { |
| assert(false, "Invalid 'proto_generators' value.") |
| } |
| } |
| } |
