File: light-jdk8u66-b17-deopt-cp.patch

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openjdk-8-jre-dcevm 8u112-1
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diff --git a/src/share/vm/classfile/classFileParser.cpp b/src/share/vm/classfile/classFileParser.cpp
index fa7986b..0910a7d 100644
--- a/src/share/vm/classfile/classFileParser.cpp
+++ b/src/share/vm/classfile/classFileParser.cpp
@@ -4264,6 +4264,30 @@
       }
     }
 
+    if (this_klass->external_name() != NULL && HotswapDeoptClassPath != NULL) {
+      const char* deopt_path = HotswapDeoptClassPath;
+      const char* const end = deopt_path + strlen(deopt_path);
+      bool deopt_found = false;
+      while (!deopt_found && deopt_path < end) {
+        const char* tmp_end = strchr(deopt_path, ',');
+        if (tmp_end == NULL) {
+          tmp_end = end;
+        }
+        char* deopt_segm_path = NEW_C_HEAP_ARRAY(char, tmp_end - deopt_path + 1, mtInternal);
+        memcpy(deopt_segm_path, deopt_path, tmp_end - deopt_path);
+        deopt_segm_path[tmp_end - deopt_path] = '\0';
+        if (strstr(this_klass->external_name(), deopt_segm_path) != NULL) {
+          if (TraceRedefineClasses > 0) {
+            tty->print_cr("Including in deoptimization : %s", this_klass->external_name());
+          }
+          this_klass->set_deoptimization_incl(true);
+          deopt_found = true;
+        }
+        FREE_C_HEAP_ARRAY(char, deopt_segm_path, mtInternal);
+        deopt_path = tmp_end + 1;
+      }
+    }
+
     if (TraceClassResolution) {
       ResourceMark rm;
       // print out the superclass.
diff --git a/src/share/vm/classfile/systemDictionary.cpp b/src/share/vm/classfile/systemDictionary.cpp
index e40b061..588e0e5 100644
--- a/src/share/vm/classfile/systemDictionary.cpp
+++ b/src/share/vm/classfile/systemDictionary.cpp
@@ -1255,6 +1255,31 @@
       ik->restore_unshareable_info(loader_data, protection_domain, CHECK_(nh));
     }
 
+    if (HotswapDeoptClassPath != NULL) {
+      const char* deopt_path = HotswapDeoptClassPath;
+      const char* const end = deopt_path + strlen(deopt_path);
+      bool deopt_found = false;
+      while (!deopt_found && deopt_path < end) {
+        const char* tmp_end = strchr(deopt_path, ',');
+        if (tmp_end == NULL) {
+          tmp_end = end;
+        }
+        char* deopt_segm_path = NEW_C_HEAP_ARRAY(char, tmp_end - deopt_path + 1, mtInternal);
+        memcpy(deopt_segm_path, deopt_path, tmp_end - deopt_path);
+        deopt_segm_path[tmp_end - deopt_path] = '\0';
+        if (strstr(ik->external_name(), deopt_segm_path) != NULL) {
+          if (TraceRedefineClasses > 0) {
+            tty->print_cr("Including in deoptimization : %s", ik->external_name());
+          }
+          ik->set_deoptimization_incl(true);
+          deopt_found = true;
+        }
+        FREE_C_HEAP_ARRAY(char, deopt_segm_path, mtInternal);
+        deopt_path = tmp_end + 1;
+      }
+    }
+
+
     if (TraceClassLoading) {
       ResourceMark rm;
       tty->print("[Loaded %s", ik->external_name());
diff --git a/src/share/vm/code/codeCache.cpp b/src/share/vm/code/codeCache.cpp
index c9059d7..af10381 100644
--- a/src/share/vm/code/codeCache.cpp
+++ b/src/share/vm/code/codeCache.cpp
@@ -709,6 +709,13 @@
 }
 #endif // HOTSWAP
 
+// Deoptimize all methods having deopt-include flag
+void CodeCache::mark_all_incl_nmethods_for_deoptimization() {
+  MutexLockerEx mu(CodeCache_lock, Mutex::_no_safepoint_check_flag);
+  FOR_ALL_ALIVE_NMETHODS(nm) {
+    nm->mark_for_deoptimization_incl();
+  }
+}
 
 // Deoptimize all methods
 void CodeCache::mark_all_nmethods_for_deoptimization() {
diff --git a/src/share/vm/code/codeCache.hpp b/src/share/vm/code/codeCache.hpp
index f098284..d4a1363 100644
--- a/src/share/vm/code/codeCache.hpp
+++ b/src/share/vm/code/codeCache.hpp
@@ -184,6 +184,7 @@
     // tells how many nmethods have dependencies
   static int number_of_nmethods_with_dependencies();
 
+  static void mark_all_incl_nmethods_for_deoptimization();
   static int get_codemem_full_count() { return _codemem_full_count; }
 };
 
diff --git a/src/share/vm/code/nmethod.cpp b/src/share/vm/code/nmethod.cpp
index 6ea39ae..bf2db7e 100644
--- a/src/share/vm/code/nmethod.cpp
+++ b/src/share/vm/code/nmethod.cpp
@@ -476,6 +476,7 @@
   _lazy_critical_native       = 0;
   _has_wide_vectors           = 0;
   _marked_for_deoptimization  = 0;
+  _deoptimization_incl        = false;
   _lock_count                 = 0;
   _stack_traversal_mark       = 0;
   _unload_reported            = false;           // jvmti state
@@ -688,6 +689,7 @@
     _dependencies_offset     = _scopes_pcs_offset;
     _handler_table_offset    = _dependencies_offset;
     _nul_chk_table_offset    = _handler_table_offset;
+
     _nmethod_end_offset      = _nul_chk_table_offset;
     _compile_id              = compile_id;
     _comp_level              = CompLevel_none;
@@ -697,6 +699,8 @@
     _exception_cache         = NULL;
     _pc_desc_cache.reset_to(NULL);
     _hotness_counter         = NMethodSweeper::hotness_counter_reset_val();
+    if (method != NULL)
+      _deoptimization_incl = method->method_holder()->is_deoptimization_incl();
 
     code_buffer->copy_values_to(this);
     if (ScavengeRootsInCode) {
@@ -772,6 +776,7 @@
     _metadata_offset         = _oops_offset         + round_to(code_buffer->total_oop_size(), oopSize);
     _scopes_data_offset      = _metadata_offset     + round_to(code_buffer->total_metadata_size(), wordSize);
     _scopes_pcs_offset       = _scopes_data_offset;
+
     _dependencies_offset     = _scopes_pcs_offset;
     _handler_table_offset    = _dependencies_offset;
     _nul_chk_table_offset    = _handler_table_offset;
@@ -784,6 +789,8 @@
     _exception_cache         = NULL;
     _pc_desc_cache.reset_to(NULL);
     _hotness_counter         = NMethodSweeper::hotness_counter_reset_val();
+    if (method != NULL)
+      _deoptimization_incl = method->method_holder()->is_deoptimization_incl();
 
     code_buffer->copy_values_to(this);
     if (ScavengeRootsInCode) {
@@ -900,6 +907,9 @@
     _exception_cache         = NULL;
     _pc_desc_cache.reset_to(scopes_pcs_begin());
 
+    if (method != NULL)
+      _deoptimization_incl = method->method_holder()->is_deoptimization_incl();
+
     // Copy contents of ScopeDescRecorder to nmethod
     code_buffer->copy_values_to(this);
     debug_info->copy_to(this);
diff --git a/src/share/vm/code/nmethod.hpp b/src/share/vm/code/nmethod.hpp
index b7d6890..3de4757 100644
--- a/src/share/vm/code/nmethod.hpp
+++ b/src/share/vm/code/nmethod.hpp
@@ -184,6 +184,8 @@
   bool _marked_for_reclamation;              // Used by NMethodSweeper (set only by sweeper)
   bool _marked_for_deoptimization;           // Used for stack deoptimization
 
+  bool _deoptimization_incl;
+
   // used by jvmti to track if an unload event has been posted for this nmethod.
   bool _unload_reported;
 
@@ -470,6 +472,11 @@
   bool  is_marked_for_deoptimization() const      { return _marked_for_deoptimization; }
   void  mark_for_deoptimization()                 { _marked_for_deoptimization = true; }
 
+  bool  is_deoptimization_incl() const            { return _deoptimization_incl; }
+  void  set_deoptimization_incl(bool z)           { _deoptimization_incl = z; }
+
+  void  mark_for_deoptimization_incl()            { if (_deoptimization_incl) _marked_for_deoptimization = true; }
+
   void  make_unloaded(BoolObjectClosure* is_alive, oop cause);
 
   bool has_dependencies()                         { return dependencies_size() != 0; }
diff --git a/src/share/vm/oops/klass.cpp b/src/share/vm/oops/klass.cpp
index 2e3d192..a889458 100644
--- a/src/share/vm/oops/klass.cpp
+++ b/src/share/vm/oops/klass.cpp
@@ -188,6 +188,7 @@
 
   set_redefinition_flags(Klass::NoRedefinition);
   set_redefining(false);
+  set_deoptimization_incl(false);
   set_new_version(NULL);
   set_old_version(NULL);
   set_redefinition_index(-1);
@@ -236,6 +237,8 @@
   if (FastSuperclassLimit == 0) {
     // None of the other machinery matters.
     set_super(k);
+    if (k != NULL && k->is_deoptimization_incl())
+      set_deoptimization_incl(true);
     return;
   }
   if (k == NULL) {
@@ -247,6 +250,8 @@
            "initialize this only once to a non-trivial value");
     set_super(k);
     Klass* sup = k;
+    if (sup->is_deoptimization_incl())
+      set_deoptimization_incl(true);
     int sup_depth = sup->super_depth();
     juint my_depth  = MIN2(sup_depth + 1, (int)primary_super_limit());
     if (!can_be_primary_super_slow())
diff --git a/src/share/vm/oops/klass.hpp b/src/share/vm/oops/klass.hpp
index e3fc3bd..c5fc46d 100644
--- a/src/share/vm/oops/klass.hpp
+++ b/src/share/vm/oops/klass.hpp
@@ -177,6 +177,7 @@
   bool        _original_field_offsets_changed; // Did the original field offsets of this class change during class redefinition?
   int *       _update_information;     // Update information
   bool        _is_redefining;
+  bool        _deoptimization_incl; // True if class methods are included in deoptimization
 
   // Biased locking implementation and statistics
   // (the 64-bit chunk goes first, to avoid some fragmentation)
@@ -263,6 +264,9 @@
   int *update_information() const                      { return _update_information; }
   void set_update_information(int *info)               { _update_information = info; }
 
+  bool  is_deoptimization_incl() const                 { return _deoptimization_incl; }
+  void  set_deoptimization_incl(bool z)                { _deoptimization_incl = z; }
+
   // Revision number for redefined classes, -1 for originally loaded classes
   bool was_redefined() const            { return _revision_number != -1; }
   jint revision_number() const          { return _revision_number; }
diff --git a/src/share/vm/prims/jvmtiRedefineClasses2.cpp b/src/share/vm/prims/jvmtiRedefineClasses2.cpp
index f545b98..4fad1cb 100644
--- a/src/share/vm/prims/jvmtiRedefineClasses2.cpp
+++ b/src/share/vm/prims/jvmtiRedefineClasses2.cpp
@@ -443,6 +443,8 @@
 
     new_class->set_redefinition_flags(redefinition_flags);
 
+    new_class->set_deoptimization_incl(true);
+
     _max_redefinition_flags = _max_redefinition_flags | redefinition_flags;
 
     if ((redefinition_flags & Klass::ModifyInstances) != 0) {
@@ -1572,7 +1574,10 @@
   if (0 && JvmtiExport::all_dependencies_are_recorded()) {
     Universe::flush_evol_dependents_on(k_h);
   } else {
-    CodeCache::mark_all_nmethods_for_deoptimization();
+  	if (HotswapDeoptClassPath == NULL)
+  		CodeCache::mark_all_nmethods_for_deoptimization();
+  	else
+    	CodeCache::mark_all_incl_nmethods_for_deoptimization();
 
     ResourceMark rm(THREAD);
     DeoptimizationMarker dm;
diff --git a/src/share/vm/runtime/globals.hpp b/src/share/vm/runtime/globals.hpp
index 9a51218..b8ca7bb 100644
--- a/src/share/vm/runtime/globals.hpp
+++ b/src/share/vm/runtime/globals.hpp
@@ -3962,7 +3962,16 @@
                                                                             \
   product_pd(bool, PreserveFramePointer,                                    \
              "Use the FP register for holding the frame pointer "           \
-             "and not as a general purpose register.")
+             "and not as a general purpose register.")                      \
+                                                                            \
+  product(ccstr, HotswapDeoptClassPath, NULL,                               \
+          "Comma separated list of packages containing classes that are "   \
+          "expected to be redefined. If com.sun.proxy is used by "          \
+          "application and proxied class is redefined, then this option "   \
+          "should contain 'com.sun.proxy'. If the option is not defined, "  \
+          "then all classes will be deoptimized on hotswap. Using this "    \
+          "option improves hotswap performance. ")
+
 
 /*
  *  Macros for factoring of globals