Add --trace_folder to aapt2

Add a tracing API and instrument key functions in order to profile
aapt2 bottleneck. The API allows to generate systrace fragment files.

Impact on performance is neglibible with each Trace requiring less
than 1us and the final Flush operation at the end of a command
requiring around 40us.

Bug: None
Test: None
Change-Id: I51b564d3694e9384679f43b878b32295527dddf6

2 files changed, 4 insertions, 0 deletions

diff --git a/tools/aapt2/optimize/ResourceDeduper.cpp b/tools/aapt2/optimize/ResourceDeduper.cpp
index ee2dfbce7c06..78ebcb97b811 100644
--- a/tools/aapt2/optimize/ResourceDeduper.cpp
+++ b/tools/aapt2/optimize/ResourceDeduper.cpp
@@ -20,6 +20,7 @@
 
 #include "DominatorTree.h"
 #include "ResourceTable.h"
+#include "trace/TraceBuffer.h"
 
 using android::ConfigDescription;
 
@@ -110,6 +111,7 @@ static void DedupeEntry(IAaptContext* context, ResourceEntry* entry) {
 }  // namespace
 
 bool ResourceDeduper::Consume(IAaptContext* context, ResourceTable* table) {
+  TRACE_CALL();
   for (auto& package : table->packages) {
     for (auto& type : package->types) {
       for (auto& entry : type->entries) {
diff --git a/tools/aapt2/optimize/VersionCollapser.cpp b/tools/aapt2/optimize/VersionCollapser.cpp
index f9856047ac40..cd791bda250b 100644
--- a/tools/aapt2/optimize/VersionCollapser.cpp
+++ b/tools/aapt2/optimize/VersionCollapser.cpp
@@ -20,6 +20,7 @@
 #include <vector>
 
 #include "ResourceTable.h"
+#include "trace/TraceBuffer.h"
 
 using android::ConfigDescription;
 
@@ -144,6 +145,7 @@ static void CollapseVersions(int min_sdk, ResourceEntry* entry) {
 }
 
 bool VersionCollapser::Consume(IAaptContext* context, ResourceTable* table) {
+  TRACE_NAME("VersionCollapser::Consume");
   const int min_sdk = context->GetMinSdkVersion();
   for (auto& package : table->packages) {
     for (auto& type : package->types) {