8330846: Add stacks of mounted virtual threads to the HotSpot thread dump

src/hotspot/share/runtime/javaThread.cpp

@@ -1825,11 +1825,6 @@ void JavaThread::print_vthread_stack_on(outputStream* st) {
     }
     if (f->is_java_frame()) {
       javaVFrame* jvf = javaVFrame::cast(f);
-      int indentation = st->indentation();
-      while(indentation > 0) {
-        st->print("\t");
-        indentation--;
-      }
       java_lang_Throwable::print_stack_element(st, jvf->method(), jvf->bci());
 
       // Print out lock information

src/hotspot/share/runtime/threads.cpp

@@ -1333,10 +1333,8 @@ void Threads::print_on(outputStream* st, bool print_stacks,
           if (p->is_vthread_mounted()) {
             oop vt = p->vthread();
             assert(vt != nullptr, "");
-            st->print_cr("   \tMounted virtual thread #" INT64_FORMAT, (int64_t)java_lang_Thread::thread_id(vt));
-            st->inc();
+            st->print_cr("   Mounted virtual thread #" INT64_FORMAT, (int64_t)java_lang_Thread::thread_id(vt));
             p->print_vthread_stack_on(st);
-            st->dec();
           }
         }
       }