8034764: Use process_strong_roots to adjust the StringTable

Reviewed-by: tschatzl, brutisso

src/share/vm/gc_implementation/g1/g1MarkSweep.cpp

@@ -307,7 +307,7 @@ void G1MarkSweep::mark_sweep_phase3() {
   ClassLoaderDataGraph::clear_claimed_marks();
 
   sh->process_strong_roots(true,  // activate StrongRootsScope
-                           SharedHeap::SO_AllClasses | SharedHeap::SO_AllCodeCache,
+                           SharedHeap::SO_AllClasses | SharedHeap::SO_Strings | SharedHeap::SO_AllCodeCache,
                            &GenMarkSweep::adjust_pointer_closure,
                            &GenMarkSweep::adjust_klass_closure);
 

src/share/vm/memory/genMarkSweep.cpp

@@ -294,7 +294,7 @@ void GenMarkSweep::mark_sweep_phase3(int level) {
   gch->gen_process_strong_roots(level,
                                 false, // Younger gens are not roots.
                                 true,  // activate StrongRootsScope
-                                SharedHeap::SO_AllClasses | SharedHeap::SO_AllCodeCache,
+                                SharedHeap::SO_AllClasses | SharedHeap::SO_Strings | SharedHeap::SO_AllCodeCache,
                                 &adjust_pointer_closure,
                                 &adjust_pointer_closure,
                                 &adjust_klass_closure);

src/share/vm/memory/sharedHeap.cpp

@@ -239,8 +239,6 @@ static AlwaysTrueClosure always_true;
 void SharedHeap::process_weak_roots(OopClosure* root_closure) {
   // Global (weak) JNI handles
   JNIHandles::weak_oops_do(&always_true, root_closure);
-
-  StringTable::oops_do(root_closure);
 }
 
 void SharedHeap::set_barrier_set(BarrierSet* bs) {

src/share/vm/memory/sharedHeap.hpp

@@ -240,8 +240,7 @@ public:
                             OopClosure* roots,
                             KlassClosure* klass_closure);
 
-  // Apply "root_closure" to all the weak roots of the system.
-  // These include JNI weak roots and string table.
+  // Apply "root_closure" to the JNI weak roots..
   void process_weak_roots(OopClosure* root_closure);
 
   // The functions below are helper functions that a subclass of