Add trace points for class loading.

To augment traces and debug potential class loading hotspots.

Test: m
Change-Id: Iefb33e90e21ee1c597f6e4accd4cca83245fbd6e

1 files changed, 1 insertions, 0 deletions

diff --git a/runtime/class_linker.cc b/runtime/class_linker.cc
index da7b845d67..cdd07f6e40 100644
--- a/runtime/class_linker.cc
+++ b/runtime/class_linker.cc
@@ -3351,6 +3351,7 @@ ObjPtr<mirror::Class> ClassLinker::DefineClass(Thread* self,
                                                Handle<mirror::ClassLoader> class_loader,
                                                const DexFile& dex_file,
                                                const dex::ClassDef& dex_class_def) {
+  ScopedTrace trace([&]() { return android::base::StringPrintf("Defining %s", descriptor); });
   ScopedDefiningClass sdc(self);
   StackHandleScope<3> hs(self);
   metrics::AutoTimer timer{GetMetrics()->ClassLoadingTotalTime()};