Tracing V2 prototype [NOT FOR REVIEW]

base/BUILD.gn

 # Copyright (c) 2013 The Chromium Authors. All rights reserved.
 # Use of this source code is governed by a BSD-style license that can be
 # found in the LICENSE file.
 
 # HOW TO WRITE CONDITIONALS IN THIS FILE
 # ======================================
 #
 # In many other places, one would write a conditional that expresses all the
 # cases when a source file is used or unused, and then either add or subtract
 # it from the sources list in that case
@@ skipping 906 matching lines @@
     "trace_event/trace_event_synthetic_delay.h",
     "trace_event/trace_event_system_stats_monitor.cc",
     "trace_event/trace_event_system_stats_monitor.h",
     "trace_event/trace_log.cc",
     "trace_event/trace_log.h",
     "trace_event/trace_log_constants.cc",
     "trace_event/trace_sampling_thread.cc",
     "trace_event/trace_sampling_thread.h",
     "trace_event/tracing_agent.cc",
     "trace_event/tracing_agent.h",
+    "trace_event/v2/append_only_proto_message.cc",
+    "trace_event/v2/append_only_proto_message.h",
+    "trace_event/v2/proto_utils.cc",
+    "trace_event/v2/proto_utils.h",
+    "trace_event/v2/ring_buffer.cc",
+    "trace_event/v2/ring_buffer.h",
+    "trace_event/v2/scattered_buffer.h",
+    "trace_event/v2/scattered_buffer.cc",
+    "trace_event/v2/trace_event.h",
+    "trace_event/v2/trace_event.cc",
     "trace_event/winheap_dump_provider_win.cc",
     "trace_event/winheap_dump_provider_win.h",
     "tracked_objects.cc",
     "tracked_objects.h",
     "tracking_info.cc",
     "tracking_info.h",
     "tuple.h",
     "value_conversions.cc",
     "value_conversions.h",
     "values.cc",
@@ skipping 65 matching lines @@
     "//build/config:precompiled_headers",
   ]
 
   deps = [
     "//base/allocator",
     "//base/allocator:features",
     "//base/third_party/dynamic_annotations",
     "//third_party/modp_b64",
   ]
 
+  if (!is_nacl) {
+    deps += [
+      ":tracing_protos",
+    ]
+  }
+
   public_deps = [
     ":base_paths",
     ":base_static",
     ":build_date",
     ":debugging_flags",
   ]
 
   # Needed for <atomic> if using newer C++ library than sysroot
   if (!use_sysroot && (is_android || is_linux)) {
     libs = [ "atomic" ]
@@ skipping 647 matching lines @@
     "test/data/serializer_nested_test.json",
     "test/data/serializer_test.json",
     "test/data/serializer_test_nowhitespace.json",
   ]
   outputs = [
     "{{bundle_resources_dir}}/" +
         "{{source_root_relative_dir}}/{{source_file_part}}",
   ]
 }
 
+executable("tracing_perftests") {
+  sources = [ "trace_event/v2/append_only_proto_message_perftest.cc" ]
+  deps = [ ":base" ]
+}
+
 test("base_unittests") {
   sources = [
     "allocator/tcmalloc_unittest.cc",
     "android/application_status_listener_unittest.cc",
     "android/content_uri_utils_unittest.cc",
     "android/jni_android_unittest.cc",
     "android/jni_array_unittest.cc",
     "android/jni_string_unittest.cc",
     "android/library_loader/library_prefetcher_unittest.cc",
     "android/path_utils_unittest.cc",
@@ skipping 200 matching lines @@
     "threading/watchdog_unittest.cc",
     "threading/worker_pool_posix_unittest.cc",
     "threading/worker_pool_unittest.cc",
     "time/pr_time_unittest.cc",
     "time/time_unittest.cc",
     "time/time_win_unittest.cc",
     "timer/hi_res_timer_manager_unittest.cc",
     "timer/mock_timer_unittest.cc",
     "timer/timer_unittest.cc",
     "tools_sanity_unittest.cc",
+    "trace_event/v2/append_only_proto_message_unittest.cc",
     "trace_event/blame_context_unittest.cc",
     "trace_event/heap_profiler_allocation_context_tracker_unittest.cc",
     "trace_event/heap_profiler_allocation_register_unittest.cc",
     "trace_event/heap_profiler_heap_dump_writer_unittest.cc",
     "trace_event/heap_profiler_stack_frame_deduplicator_unittest.cc",
     "trace_event/heap_profiler_type_name_deduplicator_unittest.cc",
     "trace_event/java_heap_dump_provider_android_unittest.cc",
     "trace_event/memory_allocator_dump_unittest.cc",
     "trace_event/memory_dump_manager_unittest.cc",
     "trace_event/process_memory_dump_unittest.cc",
@@ skipping 452 matching lines @@
 
   # GYP: //base.gyp:base_java_unittest_support
   android_library("base_java_unittest_support") {
     deps = [
       ":base_java",
     ]
     java_files =
         [ "test/android/java/src/org/chromium/base/ContentUriTestUtils.java" ]
   }
 }
+
+action("tracing_protos") {
+  script = "trace_event/v2/tracing_protoc.py"
+  gen_dir = "$target_gen_dir/trace_event/common/proto"
+
+  deps = [ "//third_party/protobuf:protoc" ]
+  public_configs = [ "//third_party/protobuf:using_proto" ]  # for gen/ include
+
+  inputs = [
+    "trace_event/common/proto/event.proto",
+    "trace_event/common/proto/events_chunk.proto",
+    "trace_event/common/proto/event_args_simple.proto",
+    "trace_event/common/proto/event_args_test.proto"
+  ]
+  outputs = [
+    "$gen_dir/event.pb.h",
+    "$gen_dir/events_chunk.pb.h",
+    "$gen_dir/event_args_simple.pb.h",
+  ]
+
+  args = [
+    "--protoc=" + rebase_path("$root_out_dir/protoc", root_build_dir),
+    "--proto-in-dir=" + rebase_path("trace_event/common/proto", root_build_dir),
+    "--proto-out-dir=" + rebase_path("$gen_dir", root_build_dir),
+  ]
+  args += rebase_path(inputs, root_build_dir)
+}