Fix code cache roots relocation

Author: caizixian

openjdk/share/mmtkRootsClosure.hpp

@@ -140,4 +140,14 @@ class MMTkScanObjectClosure : public BasicOopIterateClosure {
 //   }
 // };
 
+class CodeBlobFixRelocationClosure: public CodeBlobClosure {
+ public:
+  inline virtual void do_code_blob(CodeBlob* cb) {
+    nmethod* nm = cb->as_nmethod_or_null();
+    if (nm != NULL) {
+      nm->fix_oop_relocations();
+    }
+  }
+};
+
 #endif // MMTK_OPENJDK_MMTK_ROOTS_CLOSURE_HPP

openjdk/share/mmtkUpcalls.cpp

@@ -76,6 +76,10 @@ static void mmtk_resume_mutators(void *tls) {
 #if COMPILER2_OR_JVMCI
   DerivedPointerTable::update_pointers();
 #endif
+  {
+    CodeBlobFixRelocationClosure cb_cl;
+    CodeCache::blobs_do(&cb_cl);
+  }
 
   // Note: we don't have to hold gc_lock to increment the counter.
   // The increment has to be done before mutators can be resumed