# HG changeset patch
# User gziemski
# Date 1535119971 18000
# Node ID ef7852ece52b88c3cf55c5f011e2b359fb678051
# Parent  ecb650023e281a5ef7a2f01e886314c78356fdf7
8209622: applications/kitchensink/Kitchensink.java failed with Kitchensink failed with exit code = 138
Summary: SymbolTableLock no longer checks for safepoints
Reviewed-by: coleenp, rehn

diff -r ecb650023e28 -r ef7852ece52b src/hotspot/share/classfile/symbolTable.cpp
--- a/src/hotspot/share/classfile/symbolTable.cpp	Mon Aug 20 12:08:07 2018 +0200
+++ b/src/hotspot/share/classfile/symbolTable.cpp	Fri Aug 24 09:12:51 2018 -0500
@@ -134,7 +134,7 @@
 
 void SymbolTable::delete_symbol(Symbol* sym) {
   if (sym->refcount() == PERM_REFCOUNT) {
-    MutexLocker ml(SymbolTable_lock); // Protect arena
+    MutexLockerEx ml(SymbolArena_lock, Mutex::_no_safepoint_check_flag); // Protect arena
     // Deleting permanent symbol should not occur very often (insert race condition),
     // so log it.
     log_trace_symboltable_helper(sym, "Freeing permanent symbol");
@@ -197,7 +197,7 @@
     assert(sym != NULL, "new should call vm_exit_out_of_memory if C_HEAP is exhausted");
   } else {
     // Allocate to global arena
-    MutexLocker ml(SymbolTable_lock); // Protect arena
+    MutexLockerEx ml(SymbolArena_lock, Mutex::_no_safepoint_check_flag); // Protect arena
     sym = new (len, arena(), THREAD) Symbol((const u1*)name, len, PERM_REFCOUNT);
   }
   return sym;
diff -r ecb650023e28 -r ef7852ece52b src/hotspot/share/runtime/mutexLocker.cpp
--- a/src/hotspot/share/runtime/mutexLocker.cpp	Mon Aug 20 12:08:07 2018 +0200
+++ b/src/hotspot/share/runtime/mutexLocker.cpp	Fri Aug 24 09:12:51 2018 -0500
@@ -63,7 +63,7 @@
 Mutex*   AdapterHandlerLibrary_lock   = NULL;
 Mutex*   SignatureHandlerLibrary_lock = NULL;
 Mutex*   VtableStubs_lock             = NULL;
-Mutex*   SymbolTable_lock             = NULL;
+Mutex*   SymbolArena_lock             = NULL;
 Mutex*   StringTable_lock             = NULL;
 Monitor* StringDedupQueue_lock        = NULL;
 Mutex*   StringDedupTable_lock        = NULL;
@@ -237,7 +237,7 @@
   def(ExpandHeap_lock              , PaddedMutex  , leaf,        true,  Monitor::_safepoint_check_always);     // Used during compilation by VM thread
   def(JNIHandleBlockFreeList_lock  , PaddedMutex  , leaf,        true,  Monitor::_safepoint_check_never);      // handles are used by VM thread
   def(SignatureHandlerLibrary_lock , PaddedMutex  , leaf,        false, Monitor::_safepoint_check_always);
-  def(SymbolTable_lock             , PaddedMutex  , leaf+2,      true,  Monitor::_safepoint_check_always);
+  def(SymbolArena_lock             , PaddedMutex  , leaf+2,      true,  Monitor::_safepoint_check_never);
   def(StringTable_lock             , PaddedMutex  , leaf,        true,  Monitor::_safepoint_check_always);
   def(ProfilePrint_lock            , PaddedMutex  , leaf,        false, Monitor::_safepoint_check_always);     // serial profile printing
   def(ExceptionCache_lock          , PaddedMutex  , leaf,        false, Monitor::_safepoint_check_always);     // serial profile printing
@@ -280,7 +280,7 @@
   def(CompileTaskAlloc_lock        , PaddedMutex  , nonleaf+2,   true,  Monitor::_safepoint_check_always);
   def(CompileStatistics_lock       , PaddedMutex  , nonleaf+2,   false, Monitor::_safepoint_check_always);
   def(DirectivesStack_lock         , PaddedMutex  , special,     true,  Monitor::_safepoint_check_never);
-  def(MultiArray_lock              , PaddedMutex  , nonleaf+2,   false, Monitor::_safepoint_check_always);     // locks SymbolTable_lock
+  def(MultiArray_lock              , PaddedMutex  , nonleaf+2,   false, Monitor::_safepoint_check_always);
 
   def(JvmtiThreadState_lock        , PaddedMutex  , nonleaf+2,   false, Monitor::_safepoint_check_always);     // Used by JvmtiThreadState/JvmtiEventController
   def(Management_lock              , PaddedMutex  , nonleaf+2,   false, Monitor::_safepoint_check_always);     // used for JVM management
diff -r ecb650023e28 -r ef7852ece52b src/hotspot/share/runtime/mutexLocker.hpp
--- a/src/hotspot/share/runtime/mutexLocker.hpp	Mon Aug 20 12:08:07 2018 +0200
+++ b/src/hotspot/share/runtime/mutexLocker.hpp	Fri Aug 24 09:12:51 2018 -0500
@@ -57,7 +57,7 @@
 extern Mutex*   AdapterHandlerLibrary_lock;      // a lock on the AdapterHandlerLibrary
 extern Mutex*   SignatureHandlerLibrary_lock;    // a lock on the SignatureHandlerLibrary
 extern Mutex*   VtableStubs_lock;                // a lock on the VtableStubs
-extern Mutex*   SymbolTable_lock;                // a lock on the symbol table
+extern Mutex*   SymbolArena_lock;                // a lock on the symbol table arena
 extern Mutex*   StringTable_lock;                // a lock on the interned string table
 extern Monitor* StringDedupQueue_lock;           // a lock on the string deduplication queue
 extern Mutex*   StringDedupTable_lock;           // a lock on the string deduplication table