Include tags in trace data.

The tags item in the trace data is arbitrary metadata added to `build`
steps by Soong (and my Kati via `.KATI_TAGS` target-specific
variables). Include this in the perfetto trace so we can analyze it.

Bug: http://b/259130368
Test: End to end test tracing cp time in dist targets
Change-Id: I85d33f579dc40dbae616b24cd4cb150d86262470

4 files changed, 34 insertions, 17 deletions

diff --git a/ui/status/ninja.go b/ui/status/ninja.go
index fc0e21a05..fb760ac8f 100644
--- a/ui/status/ninja.go
+++ b/ui/status/ninja.go
@@ -174,6 +174,7 @@ func (n *NinjaReader) run() {
 						IOOutputKB:                 msg.EdgeFinished.GetIoOutputKb(),
 						VoluntaryContextSwitches:   msg.EdgeFinished.GetVoluntaryContextSwitches(),
 						InvoluntaryContextSwitches: msg.EdgeFinished.GetInvoluntaryContextSwitches(),
+						Tags:                       msg.EdgeFinished.GetTags(),
 					},
 				})
 			}
diff --git a/ui/status/ninja_frontend/frontend.pb.go b/ui/status/ninja_frontend/frontend.pb.go
index bcadc67e7..d0c49533a 100644
--- a/ui/status/ninja_frontend/frontend.pb.go
+++ b/ui/status/ninja_frontend/frontend.pb.go
@@ -14,8 +14,8 @@
 
 // Code generated by protoc-gen-go. DO NOT EDIT.
 // versions:
-// 	protoc-gen-go v1.26.0
-// 	protoc        v3.9.1
+// 	protoc-gen-go v1.28.1
+// 	protoc        v3.21.12
 // source: frontend.proto
 
 package ninja_frontend
@@ -459,6 +459,9 @@ type Status_EdgeFinished struct {
 	VoluntaryContextSwitches *uint64 `protobuf:"varint,12,opt,name=voluntary_context_switches,json=voluntaryContextSwitches" json:"voluntary_context_switches,omitempty"`
 	// Involuntary context switches
 	InvoluntaryContextSwitches *uint64 `protobuf:"varint,13,opt,name=involuntary_context_switches,json=involuntaryContextSwitches" json:"involuntary_context_switches,omitempty"`
+	// Arbitrary tags for build system profiling (module names and types, rule
+	// names, etc). Format of the string is implementation defined.
+	Tags *string `protobuf:"bytes,14,opt,name=tags" json:"tags,omitempty"`
 }
 
 func (x *Status_EdgeFinished) Reset() {
@@ -584,6 +587,13 @@ func (x *Status_EdgeFinished) GetInvoluntaryContextSwitches() uint64 {
 	return 0
 }
 
+func (x *Status_EdgeFinished) GetTags() string {
+	if x != nil && x.Tags != nil {
+		return *x.Tags
+	}
+	return ""
+}
+
 type Status_Message struct {
 	state         protoimpl.MessageState
 	sizeCache     protoimpl.SizeCache
@@ -650,7 +660,7 @@ var File_frontend_proto protoreflect.FileDescriptor
 
 var file_frontend_proto_rawDesc = []byte{
 	0x0a, 0x0e, 0x66, 0x72, 0x6f, 0x6e, 0x74, 0x65, 0x6e, 0x64, 0x2e, 0x70, 0x72, 0x6f, 0x74, 0x6f,
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@@ -694,7 +704,7 @@ var file_frontend_proto_rawDesc = []byte{
 	0x65, 0x73, 0x63, 0x12, 0x18, 0x0a, 0x07, 0x63, 0x6f, 0x6d, 0x6d, 0x61, 0x6e, 0x64, 0x18, 0x06,
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@@ -724,19 +734,20 @@ var file_frontend_proto_rawDesc = []byte{
 	0x75, 0x6e, 0x74, 0x61, 0x72, 0x79, 0x5f, 0x63, 0x6f, 0x6e, 0x74, 0x65, 0x78, 0x74, 0x5f, 0x73,
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 }
 
 var (
diff --git a/ui/status/ninja_frontend/frontend.proto b/ui/status/ninja_frontend/frontend.proto
index 57303889e..6cb4a0d02 100644
--- a/ui/status/ninja_frontend/frontend.proto
+++ b/ui/status/ninja_frontend/frontend.proto
@@ -79,6 +79,9 @@ message Status {
     optional uint64 voluntary_context_switches = 12;
     // Involuntary context switches
     optional uint64 involuntary_context_switches = 13;
+    // Arbitrary tags for build system profiling (module names and types, rule
+    // names, etc). Format of the string is implementation defined.
+    optional string tags = 14;
   }
 
   message Message {
diff --git a/ui/status/status.go b/ui/status/status.go
index a5b4a2867..f3e58b660 100644
--- a/ui/status/status.go
+++ b/ui/status/status.go
@@ -85,6 +85,8 @@ type ActionResultStats struct {
 
 	// Involuntary context switches
 	InvoluntaryContextSwitches uint64
+
+	Tags string
 }
 
 // Counts describes the number of actions in each state