changeset 7404:b6c9c0109a60 hs25-b13

Merge
author amurillo
date Fri, 14 Dec 2012 14:19:35 -0800
parents 8af7d22f1f8f 807f1d348f7b
children cb8a4e04bc8c
files
diffstat 23 files changed, 415 insertions(+), 194 deletions(-) [+]
line wrap: on
line diff
--- a/agent/src/share/classes/sun/jvm/hotspot/oops/ConstMethod.java	Thu Dec 13 09:05:20 2012 -0800
+++ b/agent/src/share/classes/sun/jvm/hotspot/oops/ConstMethod.java	Fri Dec 14 14:19:35 2012 -0800
@@ -69,6 +69,8 @@
     signatureIndex             = new CIntField(type.getCIntegerField("_signature_index"), 0);
     idnum                      = new CIntField(type.getCIntegerField("_method_idnum"), 0);
     maxStack                   = new CIntField(type.getCIntegerField("_max_stack"), 0);
+    maxLocals                  = new CIntField(type.getCIntegerField("_max_locals"), 0);
+    sizeOfParameters           = new CIntField(type.getCIntegerField("_size_of_parameters"), 0);
 
     // start of byte code
     bytecodeOffset = type.getSize();
@@ -96,6 +98,8 @@
   private static CIntField signatureIndex;
   private static CIntField idnum;
   private static CIntField maxStack;
+  private static CIntField maxLocals;
+  private static CIntField sizeOfParameters;
 
   // start of bytecode
   private static long bytecodeOffset;
@@ -151,6 +155,14 @@
     return maxStack.getValue(this);
   }
 
+  public long getMaxLocals() {
+    return maxLocals.getValue(this);
+  }
+
+  public long getSizeOfParameters() {
+    return sizeOfParameters.getValue(this);
+  }
+
   public Symbol getName() {
     return getMethod().getName();
   }
@@ -247,6 +259,8 @@
       visitor.doCInt(signatureIndex, true);
       visitor.doCInt(codeSize, true);
       visitor.doCInt(maxStack, true);
+      visitor.doCInt(maxLocals, true);
+      visitor.doCInt(sizeOfParameters, true);
     }
 
   // Accessors
--- a/agent/src/share/classes/sun/jvm/hotspot/oops/Method.java	Thu Dec 13 09:05:20 2012 -0800
+++ b/agent/src/share/classes/sun/jvm/hotspot/oops/Method.java	Fri Dec 14 14:19:35 2012 -0800
@@ -50,8 +50,6 @@
     constMethod                = type.getAddressField("_constMethod");
     methodData                 = type.getAddressField("_method_data");
     methodSize                 = new CIntField(type.getCIntegerField("_method_size"), 0);
-    maxLocals                  = new CIntField(type.getCIntegerField("_max_locals"), 0);
-    sizeOfParameters           = new CIntField(type.getCIntegerField("_size_of_parameters"), 0);
     accessFlags                = new CIntField(type.getCIntegerField("_access_flags"), 0);
     code                       = type.getAddressField("_code");
     vtableIndex                = new CIntField(type.getCIntegerField("_vtable_index"), 0);
@@ -83,8 +81,6 @@
   private static AddressField  constMethod;
   private static AddressField  methodData;
   private static CIntField methodSize;
-  private static CIntField maxLocals;
-  private static CIntField sizeOfParameters;
   private static CIntField accessFlags;
   private static CIntField vtableIndex;
   private static CIntField invocationCounter;
@@ -134,8 +130,8 @@
   /** WARNING: this is in words, not useful in this system; use getObjectSize() instead */
   public long         getMethodSize()                 { return                methodSize.getValue(this);        }
   public long         getMaxStack()                   { return                getConstMethod().getMaxStack();   }
-  public long         getMaxLocals()                  { return                maxLocals.getValue(this);         }
-  public long         getSizeOfParameters()           { return                sizeOfParameters.getValue(this);  }
+  public long         getMaxLocals()                  { return                getConstMethod().getMaxLocals();         }
+  public long         getSizeOfParameters()           { return                getConstMethod().getSizeOfParameters();  }
   public long         getNameIndex()                  { return                getConstMethod().getNameIndex();  }
   public long         getSignatureIndex()             { return            getConstMethod().getSignatureIndex(); }
   public long         getGenericSignatureIndex()      { return     getConstMethod().getGenericSignatureIndex(); }
@@ -282,8 +278,6 @@
 
   public void iterateFields(MetadataVisitor visitor) {
       visitor.doCInt(methodSize, true);
-      visitor.doCInt(maxLocals, true);
-      visitor.doCInt(sizeOfParameters, true);
       visitor.doCInt(accessFlags, true);
     }
 
--- a/make/hotspot_version	Thu Dec 13 09:05:20 2012 -0800
+++ b/make/hotspot_version	Fri Dec 14 14:19:35 2012 -0800
@@ -35,7 +35,7 @@
 
 HS_MAJOR_VER=25
 HS_MINOR_VER=0
-HS_BUILD_NUMBER=12
+HS_BUILD_NUMBER=13
 
 JDK_MAJOR_VER=1
 JDK_MINOR_VER=8
--- a/src/cpu/sparc/vm/cppInterpreter_sparc.cpp	Thu Dec 13 09:05:20 2012 -0800
+++ b/src/cpu/sparc/vm/cppInterpreter_sparc.cpp	Fri Dec 14 14:19:35 2012 -0800
@@ -582,7 +582,9 @@
   // the following temporary registers are used during frame creation
   const Register Gtmp1 = G3_scratch ;
   const Register Gtmp2 = G1_scratch;
-  const Address size_of_parameters(G5_method, 0, in_bytes(Method::size_of_parameters_offset()));
+  const Register RconstMethod = Gtmp1;
+  const Address constMethod(G5_method, 0, in_bytes(Method::const_offset()));
+  const Address size_of_parameters(RconstMethod, 0, in_bytes(ConstMethod::size_of_parameters_offset()));
 
   bool inc_counter  = UseCompiler || CountCompiledCalls;
 
@@ -618,6 +620,7 @@
   }
 #endif // ASSERT
 
+  __ ld_ptr(constMethod, RconstMethod);
   __ lduh(size_of_parameters, Gtmp1);
   __ sll(Gtmp1, LogBytesPerWord, Gtmp2);       // parameter size in bytes
   __ add(Gargs, Gtmp2, Gargs);                 // points to first local + BytesPerWord
@@ -1047,8 +1050,6 @@
   const Register Gtmp = G3_scratch;
   const Address constMethod       (G5_method, 0, in_bytes(Method::const_offset()));
   const Address access_flags      (G5_method, 0, in_bytes(Method::access_flags_offset()));
-  const Address size_of_parameters(G5_method, 0, in_bytes(Method::size_of_parameters_offset()));
-  const Address size_of_locals    (G5_method, 0, in_bytes(Method::size_of_locals_offset()));
 
   // slop factor is two extra slots on the expression stack so that
   // we always have room to store a result when returning from a call without parameters
@@ -1066,6 +1067,9 @@
   // Now compute new frame size
 
   if (native) {
+    const Register RconstMethod = Gtmp;
+    const Address size_of_parameters(RconstMethod, 0, in_bytes(ConstMethod::size_of_parameters_offset()));
+    __ ld_ptr(constMethod, RconstMethod);
     __ lduh( size_of_parameters, Gtmp );
     __ calc_mem_param_words(Gtmp, Gtmp);     // space for native call parameters passed on the stack in words
   } else {
@@ -1236,9 +1240,13 @@
     }
     if (init_value != noreg) {
       Label clear_loop;
+      const Register RconstMethod = O1;
+      const Address size_of_parameters(RconstMethod, 0, in_bytes(ConstMethod::size_of_parameters_offset()));
+      const Address size_of_locals    (RconstMethod, 0, in_bytes(ConstMethod::size_of_locals_offset()));
 
       // NOTE: If you change the frame layout, this code will need to
       // be updated!
+      __ ld_ptr( constMethod, RconstMethod );
       __ lduh( size_of_locals, O2 );
       __ lduh( size_of_parameters, O1 );
       __ sll( O2, LogBytesPerWord, O2);
@@ -1483,13 +1491,16 @@
 //
 //  assert_different_registers(state, prev_state);
   const Register Gtmp = G3_scratch;
+  const RconstMethod = G3_scratch;
   const Register tmp = O2;
-  const Address size_of_parameters(G5_method, 0, in_bytes(Method::size_of_parameters_offset()));
-  const Address size_of_locals    (G5_method, 0, in_bytes(Method::size_of_locals_offset()));
+  const Address constMethod(G5_method, 0, in_bytes(Method::const_offset()));
+  const Address size_of_parameters(RconstMethod, 0, in_bytes(ConstMethod::size_of_parameters_offset()));
+  const Address size_of_locals    (RconstMethod, 0, in_bytes(ConstMethod::size_of_locals_offset()));
 
+  __ ld_ptr(constMethod, RconstMethod);
   __ lduh(size_of_parameters, tmp);
-  __ sll(tmp, LogBytesPerWord, Gtmp);       // parameter size in bytes
-  __ add(args, Gtmp, Gargs);                // points to first local + BytesPerWord
+  __ sll(tmp, LogBytesPerWord, Gargs);       // parameter size in bytes
+  __ add(args, Gargs, Gargs);                // points to first local + BytesPerWord
   // NEW
   __ add(Gargs, -wordSize, Gargs);             // points to first local[0]
   // determine extra space for non-argument locals & adjust caller's SP
@@ -1541,8 +1552,6 @@
 
   const Address constMethod       (G5_method, 0, in_bytes(Method::const_offset()));
   const Address access_flags      (G5_method, 0, in_bytes(Method::access_flags_offset()));
-  const Address size_of_parameters(G5_method, 0, in_bytes(Method::size_of_parameters_offset()));
-  const Address size_of_locals    (G5_method, 0, in_bytes(Method::size_of_locals_offset()));
 
   address entry_point = __ pc();
   __ mov(G0, prevState);                                                 // no current activation
@@ -1750,7 +1759,9 @@
 
   __ ld_ptr(STATE(_result._to_call._callee), L4_scratch);                        // called method
   __ ld_ptr(STATE(_stack), L1_scratch);                                          // get top of java expr stack
-  __ lduh(L4_scratch, in_bytes(Method::size_of_parameters_offset()), L2_scratch); // get parameter size
+  // get parameter size
+  __ ld_ptr(L4_scratch, in_bytes(Method::const_offset()), L2_scratch);
+  __ lduh(L2_scratch, in_bytes(ConstMethod::size_of_parameters_offset()), L2_scratch);
   __ sll(L2_scratch, LogBytesPerWord, L2_scratch     );                           // parameter size in bytes
   __ add(L1_scratch, L2_scratch, L1_scratch);                                      // stack destination for result
   __ ld(L4_scratch, in_bytes(Method::result_index_offset()), L3_scratch); // called method result type index
--- a/src/cpu/sparc/vm/methodHandles_sparc.cpp	Thu Dec 13 09:05:20 2012 -0800
+++ b/src/cpu/sparc/vm/methodHandles_sparc.cpp	Fri Dec 14 14:19:35 2012 -0800
@@ -171,7 +171,8 @@
 
   if (VerifyMethodHandles && !for_compiler_entry) {
     // make sure recv is already on stack
-    __ load_sized_value(Address(method_temp, Method::size_of_parameters_offset()),
+    __ ld_ptr(method_temp, in_bytes(Method::const_offset()), temp2);
+    __ load_sized_value(Address(temp2, ConstMethod::size_of_parameters_offset()),
                         temp2,
                         sizeof(u2), /*is_signed*/ false);
     // assert(sizeof(u2) == sizeof(Method::_size_of_parameters), "");
@@ -233,7 +234,8 @@
   int ref_kind = signature_polymorphic_intrinsic_ref_kind(iid);
   assert(ref_kind != 0 || iid == vmIntrinsics::_invokeBasic, "must be _invokeBasic or a linkTo intrinsic");
   if (ref_kind == 0 || MethodHandles::ref_kind_has_receiver(ref_kind)) {
-    __ load_sized_value(Address(G5_method, Method::size_of_parameters_offset()),
+    __ ld_ptr(G5_method, in_bytes(Method::const_offset()), O4_param_size);
+    __ load_sized_value(Address(O4_param_size, ConstMethod::size_of_parameters_offset()),
                         O4_param_size,
                         sizeof(u2), /*is_signed*/ false);
     // assert(sizeof(u2) == sizeof(Method::_size_of_parameters), "");
--- a/src/cpu/sparc/vm/templateInterpreter_sparc.cpp	Thu Dec 13 09:05:20 2012 -0800
+++ b/src/cpu/sparc/vm/templateInterpreter_sparc.cpp	Fri Dec 14 14:19:35 2012 -0800
@@ -494,9 +494,6 @@
   // (gri - 2/25/2000)
 
 
-  const Address size_of_parameters(G5_method, Method::size_of_parameters_offset());
-  const Address size_of_locals    (G5_method, Method::size_of_locals_offset());
-  const Address constMethod       (G5_method, Method::const_offset());
   int rounded_vm_local_words = round_to( frame::interpreter_frame_vm_local_words, WordsPerLong );
 
   const int extra_space =
@@ -506,11 +503,15 @@
     (native_call ? frame::interpreter_frame_extra_outgoing_argument_words : 0);
 
   const Register Glocals_size = G3;
+  const Register RconstMethod = Glocals_size;
   const Register Otmp1 = O3;
   const Register Otmp2 = O4;
   // Lscratch can't be used as a temporary because the call_stub uses
   // it to assert that the stack frame was setup correctly.
+  const Address constMethod       (G5_method, Method::const_offset());
+  const Address size_of_parameters(RconstMethod, ConstMethod::size_of_parameters_offset());
 
+  __ ld_ptr( constMethod, RconstMethod );
   __ lduh( size_of_parameters, Glocals_size);
 
   // Gargs points to first local + BytesPerWord
@@ -530,6 +531,8 @@
     //
     // Compute number of locals in method apart from incoming parameters
     //
+    const Address size_of_locals    (Otmp1, ConstMethod::size_of_locals_offset());
+    __ ld_ptr( constMethod, Otmp1 );
     __ lduh( size_of_locals, Otmp1 );
     __ sub( Otmp1, Glocals_size, Glocals_size );
     __ round_to( Glocals_size, WordsPerLong );
@@ -1256,8 +1259,7 @@
   // make sure registers are different!
   assert_different_registers(G2_thread, G5_method, Gargs, Gtmp1, Gtmp2);
 
-  const Address size_of_parameters(G5_method, Method::size_of_parameters_offset());
-  const Address size_of_locals    (G5_method, Method::size_of_locals_offset());
+  const Address constMethod       (G5_method, Method::const_offset());
   // Seems like G5_method is live at the point this is used. So we could make this look consistent
   // and use in the asserts.
   const Address access_flags      (Lmethod,   Method::access_flags_offset());
@@ -1307,8 +1309,13 @@
   init_value = G0;
   Label clear_loop;
 
+  const Register RconstMethod = O1;
+  const Address size_of_parameters(RconstMethod, ConstMethod::size_of_parameters_offset());
+  const Address size_of_locals    (RconstMethod, ConstMethod::size_of_locals_offset());
+
   // NOTE: If you change the frame layout, this code will need to
   // be updated!
+  __ ld_ptr( constMethod, RconstMethod );
   __ lduh( size_of_locals, O2 );
   __ lduh( size_of_parameters, O1 );
   __ sll( O2, Interpreter::logStackElementSize, O2);
@@ -1823,9 +1830,13 @@
 
     const Register Gtmp1 = G3_scratch;
     const Register Gtmp2 = G1_scratch;
+    const Register RconstMethod = Gtmp1;
+    const Address constMethod(Lmethod, Method::const_offset());
+    const Address size_of_parameters(RconstMethod, ConstMethod::size_of_parameters_offset());
 
     // Compute size of arguments for saving when returning to deoptimized caller
-    __ lduh(Lmethod, in_bytes(Method::size_of_parameters_offset()), Gtmp1);
+    __ ld_ptr(constMethod, RconstMethod);
+    __ lduh(size_of_parameters, Gtmp1);
     __ sll(Gtmp1, Interpreter::logStackElementSize, Gtmp1);
     __ sub(Llocals, Gtmp1, Gtmp2);
     __ add(Gtmp2, wordSize, Gtmp2);
--- a/src/cpu/sparc/vm/templateTable_sparc.cpp	Thu Dec 13 09:05:20 2012 -0800
+++ b/src/cpu/sparc/vm/templateTable_sparc.cpp	Fri Dec 14 14:19:35 2012 -0800
@@ -3040,7 +3040,8 @@
   Register Rtemp = G4_scratch;
 
   // Load receiver from stack slot
-  __ lduh(G5_method, in_bytes(Method::size_of_parameters_offset()), G4_scratch);
+  __ ld_ptr(G5_method, in_bytes(Method::const_offset()), G4_scratch);
+  __ lduh(G4_scratch, in_bytes(ConstMethod::size_of_parameters_offset()), G4_scratch);
   __ load_receiver(G4_scratch, O0);
 
   // receiver NULL check
--- a/src/cpu/x86/vm/cppInterpreter_x86.cpp	Thu Dec 13 09:05:20 2012 -0800
+++ b/src/cpu/x86/vm/cppInterpreter_x86.cpp	Fri Dec 14 14:19:35 2012 -0800
@@ -611,8 +611,6 @@
   // C++ interpreter only
   // rsi/r13 - previous interpreter state pointer
 
-  const Address size_of_parameters(rbx, Method::size_of_parameters_offset());
-
   // InterpreterRuntime::frequency_counter_overflow takes one argument
   // indicating if the counter overflow occurs at a backwards branch (non-NULL bcp).
   // The call returns the address of the verified entry point for the method or NULL
@@ -977,15 +975,16 @@
   //      to save/restore.
   address entry_point = __ pc();
 
-  const Address size_of_parameters(rbx, Method::size_of_parameters_offset());
-  const Address size_of_locals    (rbx, Method::size_of_locals_offset());
+  const Address constMethod       (rbx, Method::const_offset());
   const Address invocation_counter(rbx, Method::invocation_counter_offset() + InvocationCounter::counter_offset());
   const Address access_flags      (rbx, Method::access_flags_offset());
+  const Address size_of_parameters(rcx, ConstMethod::size_of_parameters_offset());
 
   // rsi/r13 == state/locals rdi == prevstate
   const Register locals = rdi;
 
   // get parameter size (always needed)
+  __ movptr(rcx, constMethod);
   __ load_unsigned_short(rcx, size_of_parameters);
 
   // rbx: Method*
@@ -994,6 +993,7 @@
   // for natives the size of locals is zero
 
   // compute beginning of parameters /locals
+
   __ lea(locals, Address(rsp, rcx, Address::times_ptr, -wordSize));
 
   // initialize fixed part of activation frame
@@ -1107,11 +1107,14 @@
   const Register method = rbx;
   const Register thread = LP64_ONLY(r15_thread) NOT_LP64(rdi);
   const Register t      = InterpreterRuntime::SignatureHandlerGenerator::temp();    // rcx|rscratch1
+  const Address constMethod       (method, Method::const_offset());
+  const Address size_of_parameters(t, ConstMethod::size_of_parameters_offset());
 
   // allocate space for parameters
   __ movptr(method, STATE(_method));
   __ verify_method_ptr(method);
-  __ load_unsigned_short(t, Address(method, Method::size_of_parameters_offset()));
+  __ movptr(t, constMethod);
+  __ load_unsigned_short(t, size_of_parameters);
   __ shll(t, 2);
 #ifdef _LP64
   __ subptr(rsp, t);
@@ -1700,15 +1703,17 @@
   // save sender sp
   __ push(rcx);
 
-  const Address size_of_parameters(rbx, Method::size_of_parameters_offset());
-  const Address size_of_locals    (rbx, Method::size_of_locals_offset());
+  const Address constMethod       (rbx, Method::const_offset());
   const Address access_flags      (rbx, Method::access_flags_offset());
+  const Address size_of_parameters(rdx, ConstMethod::size_of_parameters_offset());
+  const Address size_of_locals    (rdx, ConstMethod::size_of_locals_offset());
 
   // const Address monitor_block_top (rbp, frame::interpreter_frame_monitor_block_top_offset * wordSize);
   // const Address monitor_block_bot (rbp, frame::interpreter_frame_initial_sp_offset        * wordSize);
   // const Address monitor(rbp, frame::interpreter_frame_initial_sp_offset * wordSize - (int)sizeof(BasicObjectLock));
 
   // get parameter size (always needed)
+  __ movptr(rdx, constMethod);
   __ load_unsigned_short(rcx, size_of_parameters);
 
   // rbx: Method*
@@ -1989,7 +1994,9 @@
   __ movptr(rbx, STATE(_result._to_call._callee));
 
   // callee left args on top of expression stack, remove them
-  __ load_unsigned_short(rcx, Address(rbx, Method::size_of_parameters_offset()));
+  __ movptr(rcx, constMethod);
+  __ load_unsigned_short(rcx, Address(rcx, ConstMethod::size_of_parameters_offset()));
+
   __ lea(rsp, Address(rsp, rcx, Address::times_ptr));
 
   __ movl(rcx, Address(rbx, Method::result_index_offset()));
@@ -2159,7 +2166,9 @@
   // Make it look like call_stub calling conventions
 
   // Get (potential) receiver
-  __ load_unsigned_short(rcx, size_of_parameters);                   // get size of parameters in words
+  // get size of parameters in words
+  __ movptr(rcx, constMethod);
+  __ load_unsigned_short(rcx, Address(rcx, ConstMethod::size_of_parameters_offset()));
 
   ExternalAddress recursive(CAST_FROM_FN_PTR(address, RecursiveInterpreterActivation));
   __ pushptr(recursive.addr());                                      // make it look good in the debugger
--- a/src/cpu/x86/vm/methodHandles_x86.cpp	Thu Dec 13 09:05:20 2012 -0800
+++ b/src/cpu/x86/vm/methodHandles_x86.cpp	Fri Dec 14 14:19:35 2012 -0800
@@ -169,8 +169,9 @@
 
   if (VerifyMethodHandles && !for_compiler_entry) {
     // make sure recv is already on stack
+    __ movptr(temp2, Address(method_temp, Method::const_offset()));
     __ load_sized_value(temp2,
-                        Address(method_temp, Method::size_of_parameters_offset()),
+                        Address(temp2, ConstMethod::size_of_parameters_offset()),
                         sizeof(u2), /*is_signed*/ false);
     // assert(sizeof(u2) == sizeof(Method::_size_of_parameters), "");
     Label L;
@@ -234,8 +235,9 @@
   int ref_kind = signature_polymorphic_intrinsic_ref_kind(iid);
   assert(ref_kind != 0 || iid == vmIntrinsics::_invokeBasic, "must be _invokeBasic or a linkTo intrinsic");
   if (ref_kind == 0 || MethodHandles::ref_kind_has_receiver(ref_kind)) {
+    __ movptr(rdx_argp, Address(rbx_method, Method::const_offset()));
     __ load_sized_value(rdx_argp,
-                        Address(rbx_method, Method::size_of_parameters_offset()),
+                        Address(rdx_argp, ConstMethod::size_of_parameters_offset()),
                         sizeof(u2), /*is_signed*/ false);
     // assert(sizeof(u2) == sizeof(Method::_size_of_parameters), "");
     rdx_first_arg_addr = __ argument_address(rdx_argp, -1);
--- a/src/cpu/x86/vm/templateInterpreter_x86_32.cpp	Thu Dec 13 09:05:20 2012 -0800
+++ b/src/cpu/x86/vm/templateInterpreter_x86_32.cpp	Fri Dec 14 14:19:35 2012 -0800
@@ -424,8 +424,6 @@
   // C++ interpreter only
   // rsi - previous interpreter state pointer
 
-  const Address size_of_parameters(rbx, Method::size_of_parameters_offset());
-
   // InterpreterRuntime::frequency_counter_overflow takes one argument
   // indicating if the counter overflow occurs at a backwards branch (non-NULL bcp).
   // The call returns the address of the verified entry point for the method or NULL
@@ -868,12 +866,13 @@
   // rsi: previous interpreter state (C++ interpreter) must preserve
   address entry_point = __ pc();
 
-
-  const Address size_of_parameters(rbx, Method::size_of_parameters_offset());
+  const Address constMethod       (rbx, Method::const_offset());
   const Address invocation_counter(rbx, Method::invocation_counter_offset() + InvocationCounter::counter_offset());
   const Address access_flags      (rbx, Method::access_flags_offset());
+  const Address size_of_parameters(rcx, ConstMethod::size_of_parameters_offset());
 
   // get parameter size (always needed)
+  __ movptr(rcx, constMethod);
   __ load_unsigned_short(rcx, size_of_parameters);
 
   // native calls don't need the stack size check since they have no expression stack
@@ -988,7 +987,9 @@
 
   // allocate space for parameters
   __ get_method(method);
-  __ load_unsigned_short(t, Address(method, Method::size_of_parameters_offset()));
+  __ movptr(t, Address(method, Method::const_offset()));
+  __ load_unsigned_short(t, Address(t, ConstMethod::size_of_parameters_offset()));
+
   __ shlptr(t, Interpreter::logStackElementSize);
   __ addptr(t, 2*wordSize);     // allocate two more slots for JNIEnv and possible mirror
   __ subptr(rsp, t);
@@ -1297,13 +1298,14 @@
   // rsi: sender sp
   address entry_point = __ pc();
 
-
-  const Address size_of_parameters(rbx, Method::size_of_parameters_offset());
-  const Address size_of_locals    (rbx, Method::size_of_locals_offset());
+  const Address constMethod       (rbx, Method::const_offset());
   const Address invocation_counter(rbx, Method::invocation_counter_offset() + InvocationCounter::counter_offset());
   const Address access_flags      (rbx, Method::access_flags_offset());
+  const Address size_of_parameters(rdx, ConstMethod::size_of_parameters_offset());
+  const Address size_of_locals    (rdx, ConstMethod::size_of_locals_offset());
 
   // get parameter size (always needed)
+  __ movptr(rdx, constMethod);
   __ load_unsigned_short(rcx, size_of_parameters);
 
   // rbx,: Method*
@@ -1734,7 +1736,8 @@
 
     // Compute size of arguments for saving when returning to deoptimized caller
     __ get_method(rax);
-    __ load_unsigned_short(rax, Address(rax, in_bytes(Method::size_of_parameters_offset())));
+    __ movptr(rax, Address(rax, Method::const_offset()));
+    __ load_unsigned_short(rax, Address(rax, ConstMethod::size_of_parameters_offset()));
     __ shlptr(rax, Interpreter::logStackElementSize);
     __ restore_locals();
     __ subptr(rdi, rax);
--- a/src/cpu/x86/vm/templateInterpreter_x86_64.cpp	Thu Dec 13 09:05:20 2012 -0800
+++ b/src/cpu/x86/vm/templateInterpreter_x86_64.cpp	Fri Dec 14 14:19:35 2012 -0800
@@ -369,9 +369,6 @@
   // Everything as it was on entry
   // rdx is not restored. Doesn't appear to really be set.
 
-  const Address size_of_parameters(rbx,
-                                   Method::size_of_parameters_offset());
-
   // InterpreterRuntime::frequency_counter_overflow takes two
   // arguments, the first (thread) is passed by call_VM, the second
   // indicates if the counter overflow occurs at a backwards branch
@@ -844,14 +841,17 @@
 
   address entry_point = __ pc();
 
-  const Address size_of_parameters(rbx, Method::
-                                        size_of_parameters_offset());
+  const Address constMethod       (rbx, Method::const_offset());
   const Address invocation_counter(rbx, Method::
                                         invocation_counter_offset() +
                                         InvocationCounter::counter_offset());
   const Address access_flags      (rbx, Method::access_flags_offset());
+  const Address size_of_parameters(rcx, ConstMethod::
+                                        size_of_parameters_offset());
+
 
   // get parameter size (always needed)
+  __ movptr(rcx, constMethod);
   __ load_unsigned_short(rcx, size_of_parameters);
 
   // native calls don't need the stack size check since they have no
@@ -967,9 +967,8 @@
 
   // allocate space for parameters
   __ get_method(method);
-  __ load_unsigned_short(t,
-                         Address(method,
-                                 Method::size_of_parameters_offset()));
+  __ movptr(t, Address(method, Method::const_offset()));
+  __ load_unsigned_short(t, Address(t, ConstMethod::size_of_parameters_offset()));
   __ shll(t, Interpreter::logStackElementSize);
 
   __ subptr(rsp, t);
@@ -1302,15 +1301,18 @@
   // r13: sender sp
   address entry_point = __ pc();
 
-  const Address size_of_parameters(rbx,
-                                   Method::size_of_parameters_offset());
-  const Address size_of_locals(rbx, Method::size_of_locals_offset());
+  const Address constMethod(rbx, Method::const_offset());
   const Address invocation_counter(rbx,
                                    Method::invocation_counter_offset() +
                                    InvocationCounter::counter_offset());
   const Address access_flags(rbx, Method::access_flags_offset());
+  const Address size_of_parameters(rdx,
+                                   ConstMethod::size_of_parameters_offset());
+  const Address size_of_locals(rdx, ConstMethod::size_of_locals_offset());
+
 
   // get parameter size (always needed)
+  __ movptr(rdx, constMethod);
   __ load_unsigned_short(rcx, size_of_parameters);
 
   // rbx: Method*
@@ -1752,7 +1754,8 @@
     // Compute size of arguments for saving when returning to
     // deoptimized caller
     __ get_method(rax);
-    __ load_unsigned_short(rax, Address(rax, in_bytes(Method::
+    __ movptr(rax, Address(rax, Method::const_offset()));
+    __ load_unsigned_short(rax, Address(rax, in_bytes(ConstMethod::
                                                 size_of_parameters_offset())));
     __ shll(rax, Interpreter::logStackElementSize);
     __ restore_locals(); // XXX do we need this?
--- a/src/share/vm/classfile/javaClasses.cpp	Thu Dec 13 09:05:20 2012 -0800
+++ b/src/share/vm/classfile/javaClasses.cpp	Fri Dec 14 14:19:35 2012 -0800
@@ -327,14 +327,14 @@
   return result;
 }
 
-unsigned int java_lang_String::to_hash(oop java_string) {
+unsigned int java_lang_String::hash_code(oop java_string) {
   int          length = java_lang_String::length(java_string);
-  // Zero length string will hash to zero with String.toHash() function.
+  // Zero length string will hash to zero with String.hashCode() function.
   if (length == 0) return 0;
 
   typeArrayOop value  = java_lang_String::value(java_string);
   int          offset = java_lang_String::offset(java_string);
-  return java_lang_String::to_hash(value->char_at_addr(offset), length);
+  return java_lang_String::hash_code(value->char_at_addr(offset), length);
 }
 
 char* java_lang_String::as_quoted_ascii(oop java_string) {
--- a/src/share/vm/classfile/javaClasses.hpp	Thu Dec 13 09:05:20 2012 -0800
+++ b/src/share/vm/classfile/javaClasses.hpp	Fri Dec 14 14:19:35 2012 -0800
@@ -166,8 +166,8 @@
   // objects in the shared archive file.
   // hash P(31) from Kernighan & Ritchie
   //
-  // For this reason, THIS ALGORITHM MUST MATCH String.toHash().
-  template <typename T> static unsigned int to_hash(T* s, int len) {
+  // For this reason, THIS ALGORITHM MUST MATCH String.hashCode().
+  template <typename T> static unsigned int hash_code(T* s, int len) {
     unsigned int h = 0;
     while (len-- > 0) {
       h = 31*h + (unsigned int) *s;
@@ -175,10 +175,10 @@
     }
     return h;
   }
-  static unsigned int to_hash(oop java_string);
+  static unsigned int hash_code(oop java_string);
 
   // This is the string hash code used by the StringTable, which may be
-  // the same as String.toHash or an alternate hash code.
+  // the same as String.hashCode or an alternate hash code.
   static unsigned int hash_string(oop java_string);
 
   static bool equals(oop java_string, jchar* chars, int len);
--- a/src/share/vm/classfile/symbolTable.cpp	Thu Dec 13 09:05:20 2012 -0800
+++ b/src/share/vm/classfile/symbolTable.cpp	Fri Dec 14 14:19:35 2012 -0800
@@ -179,7 +179,7 @@
 unsigned int SymbolTable::hash_symbol(const char* s, int len) {
   return use_alternate_hashcode() ?
            AltHashing::murmur3_32(seed(), (const jbyte*)s, len) :
-           java_lang_String::to_hash(s, len);
+           java_lang_String::hash_code(s, len);
 }
 
 
@@ -617,7 +617,7 @@
 // Pick hashing algorithm
 unsigned int StringTable::hash_string(const jchar* s, int len) {
   return use_alternate_hashcode() ? AltHashing::murmur3_32(seed(), s, len) :
-                                    java_lang_String::to_hash(s, len);
+                                    java_lang_String::hash_code(s, len);
 }
 
 oop StringTable::lookup(int index, jchar* name,
--- a/src/share/vm/gc_implementation/g1/concurrentMark.cpp	Thu Dec 13 09:05:20 2012 -0800
+++ b/src/share/vm/gc_implementation/g1/concurrentMark.cpp	Fri Dec 14 14:19:35 2012 -0800
@@ -46,27 +46,11 @@
 
 // Concurrent marking bit map wrapper
 
-CMBitMapRO::CMBitMapRO(ReservedSpace rs, int shifter) :
-  _bm((uintptr_t*)NULL,0),
+CMBitMapRO::CMBitMapRO(int shifter) :
+  _bm(),
   _shifter(shifter) {
-  _bmStartWord = (HeapWord*)(rs.base());
-  _bmWordSize  = rs.size()/HeapWordSize;    // rs.size() is in bytes
-  ReservedSpace brs(ReservedSpace::allocation_align_size_up(
-                     (_bmWordSize >> (_shifter + LogBitsPerByte)) + 1));
-
-  MemTracker::record_virtual_memory_type((address)brs.base(), mtGC);
-
-  guarantee(brs.is_reserved(), "couldn't allocate concurrent marking bit map");
-  // For now we'll just commit all of the bit map up fromt.
-  // Later on we'll try to be more parsimonious with swap.
-  guarantee(_virtual_space.initialize(brs, brs.size()),
-            "couldn't reseve backing store for concurrent marking bit map");
-  assert(_virtual_space.committed_size() == brs.size(),
-         "didn't reserve backing store for all of concurrent marking bit map?");
-  _bm.set_map((uintptr_t*)_virtual_space.low());
-  assert(_virtual_space.committed_size() << (_shifter + LogBitsPerByte) >=
-         _bmWordSize, "inconsistency in bit map sizing");
-  _bm.set_size(_bmWordSize >> _shifter);
+  _bmStartWord = 0;
+  _bmWordSize = 0;
 }
 
 HeapWord* CMBitMapRO::getNextMarkedWordAddress(HeapWord* addr,
@@ -108,15 +92,40 @@
 }
 
 #ifndef PRODUCT
-bool CMBitMapRO::covers(ReservedSpace rs) const {
+bool CMBitMapRO::covers(ReservedSpace heap_rs) const {
   // assert(_bm.map() == _virtual_space.low(), "map inconsistency");
   assert(((size_t)_bm.size() * ((size_t)1 << _shifter)) == _bmWordSize,
          "size inconsistency");
-  return _bmStartWord == (HeapWord*)(rs.base()) &&
-         _bmWordSize  == rs.size()>>LogHeapWordSize;
+  return _bmStartWord == (HeapWord*)(heap_rs.base()) &&
+         _bmWordSize  == heap_rs.size()>>LogHeapWordSize;
 }
 #endif
 
+bool CMBitMap::allocate(ReservedSpace heap_rs) {
+  _bmStartWord = (HeapWord*)(heap_rs.base());
+  _bmWordSize  = heap_rs.size()/HeapWordSize;    // heap_rs.size() is in bytes
+  ReservedSpace brs(ReservedSpace::allocation_align_size_up(
+                     (_bmWordSize >> (_shifter + LogBitsPerByte)) + 1));
+  if (!brs.is_reserved()) {
+    warning("ConcurrentMark marking bit map allocation failure");
+    return false;
+  }
+  MemTracker::record_virtual_memory_type((address)brs.base(), mtGC);
+  // For now we'll just commit all of the bit map up front.
+  // Later on we'll try to be more parsimonious with swap.
+  if (!_virtual_space.initialize(brs, brs.size())) {
+    warning("ConcurrentMark marking bit map backing store failure");
+    return false;
+  }
+  assert(_virtual_space.committed_size() == brs.size(),
+         "didn't reserve backing store for all of concurrent marking bit map?");
+  _bm.set_map((uintptr_t*)_virtual_space.low());
+  assert(_virtual_space.committed_size() << (_shifter + LogBitsPerByte) >=
+         _bmWordSize, "inconsistency in bit map sizing");
+  _bm.set_size(_bmWordSize >> _shifter);
+  return true;
+}
+
 void CMBitMap::clearAll() {
   _bm.clear();
   return;
@@ -163,20 +172,79 @@
 #endif
 {}
 
-void CMMarkStack::allocate(size_t size) {
-  _base = NEW_C_HEAP_ARRAY(oop, size, mtGC);
-  if (_base == NULL) {
-    vm_exit_during_initialization("Failed to allocate CM region mark stack");
+bool CMMarkStack::allocate(size_t capacity) {
+  // allocate a stack of the requisite depth
+  ReservedSpace rs(ReservedSpace::allocation_align_size_up(capacity * sizeof(oop)));
+  if (!rs.is_reserved()) {
+    warning("ConcurrentMark MarkStack allocation failure");
+    return false;
   }
-  _index = 0;
-  _capacity = (jint) size;
+  MemTracker::record_virtual_memory_type((address)rs.base(), mtGC);
+  if (!_virtual_space.initialize(rs, rs.size())) {
+    warning("ConcurrentMark MarkStack backing store failure");
+    // Release the virtual memory reserved for the marking stack
+    rs.release();
+    return false;
+  }
+  assert(_virtual_space.committed_size() == rs.size(),
+         "Didn't reserve backing store for all of ConcurrentMark stack?");
+  _base = (oop*) _virtual_space.low();
+  setEmpty();
+  _capacity = (jint) capacity;
   _saved_index = -1;
   NOT_PRODUCT(_max_depth = 0);
+  return true;
+}
+
+void CMMarkStack::expand() {
+  // Called, during remark, if we've overflown the marking stack during marking.
+  assert(isEmpty(), "stack should been emptied while handling overflow");
+  assert(_capacity <= (jint) MarkStackSizeMax, "stack bigger than permitted");
+  // Clear expansion flag
+  _should_expand = false;
+  if (_capacity == (jint) MarkStackSizeMax) {
+    if (PrintGCDetails && Verbose) {
+      gclog_or_tty->print_cr(" (benign) Can't expand marking stack capacity, at max size limit");
+    }
+    return;
+  }
+  // Double capacity if possible
+  jint new_capacity = MIN2(_capacity*2, (jint) MarkStackSizeMax);
+  // Do not give up existing stack until we have managed to
+  // get the double capacity that we desired.
+  ReservedSpace rs(ReservedSpace::allocation_align_size_up(new_capacity *
+                                                           sizeof(oop)));
+  if (rs.is_reserved()) {
+    // Release the backing store associated with old stack
+    _virtual_space.release();
+    // Reinitialize virtual space for new stack
+    if (!_virtual_space.initialize(rs, rs.size())) {
+      fatal("Not enough swap for expanded marking stack capacity");
+    }
+    _base = (oop*)(_virtual_space.low());
+    _index = 0;
+    _capacity = new_capacity;
+  } else {
+    if (PrintGCDetails && Verbose) {
+      // Failed to double capacity, continue;
+      gclog_or_tty->print(" (benign) Failed to expand marking stack capacity from "
+                          SIZE_FORMAT"K to " SIZE_FORMAT"K",
+                          _capacity / K, new_capacity / K);
+    }
+  }
+}
+
+void CMMarkStack::set_should_expand() {
+  // If we're resetting the marking state because of an
+  // marking stack overflow, record that we should, if
+  // possible, expand the stack.
+  _should_expand = _cm->has_overflown();
 }
 
 CMMarkStack::~CMMarkStack() {
   if (_base != NULL) {
-    FREE_C_HEAP_ARRAY(oop, _base, mtGC);
+    _base = NULL;
+    _virtual_space.release();
   }
 }
 
@@ -217,7 +285,7 @@
     jint res = Atomic::cmpxchg(next_index, &_index, index);
     if (res == index) {
       for (int i = 0; i < n; i++) {
-        int ind = index + i;
+        int  ind = index + i;
         assert(ind < _capacity, "By overflow test above.");
         _base[ind] = ptr_arr[i];
       }
@@ -228,7 +296,6 @@
   }
 }
 
-
 void CMMarkStack::par_push_arr(oop* ptr_arr, int n) {
   MutexLockerEx x(ParGCRareEvent_lock, Mutex::_no_safepoint_check_flag);
   jint start = _index;
@@ -244,9 +311,9 @@
     assert(ind < _capacity, "By overflow test above.");
     _base[ind] = ptr_arr[i];
   }
+  NOT_PRODUCT(_max_depth = MAX2(_max_depth, next_index));
 }
 
-
 bool CMMarkStack::par_pop_arr(oop* ptr_arr, int max, int* n) {
   MutexLockerEx x(ParGCRareEvent_lock, Mutex::_no_safepoint_check_flag);
   jint index = _index;
@@ -255,7 +322,7 @@
     return false;
   } else {
     int k = MIN2(max, index);
-    jint new_ind = index - k;
+    jint  new_ind = index - k;
     for (int j = 0; j < k; j++) {
       ptr_arr[j] = _base[new_ind + j];
     }
@@ -404,9 +471,10 @@
   return MAX2((n_par_threads + 2) / 4, 1U);
 }
 
-ConcurrentMark::ConcurrentMark(ReservedSpace rs, uint max_regions) :
-  _markBitMap1(rs, MinObjAlignment - 1),
-  _markBitMap2(rs, MinObjAlignment - 1),
+ConcurrentMark::ConcurrentMark(G1CollectedHeap* g1h, ReservedSpace heap_rs) :
+  _g1h(g1h),
+  _markBitMap1(MinObjAlignment - 1),
+  _markBitMap2(MinObjAlignment - 1),
 
   _parallel_marking_threads(0),
   _max_parallel_marking_threads(0),
@@ -415,10 +483,10 @@
   _cleanup_sleep_factor(0.0),
   _cleanup_task_overhead(1.0),
   _cleanup_list("Cleanup List"),
-  _region_bm((BitMap::idx_t) max_regions, false /* in_resource_area*/),
-  _card_bm((rs.size() + CardTableModRefBS::card_size - 1) >>
-           CardTableModRefBS::card_shift,
-           false /* in_resource_area*/),
+  _region_bm((BitMap::idx_t)(g1h->max_regions()), false /* in_resource_area*/),
+  _card_bm((heap_rs.size() + CardTableModRefBS::card_size - 1) >>
+            CardTableModRefBS::card_shift,
+            false /* in_resource_area*/),
 
   _prevMarkBitMap(&_markBitMap1),
   _nextMarkBitMap(&_markBitMap2),
@@ -449,7 +517,8 @@
   _parallel_workers(NULL),
 
   _count_card_bitmaps(NULL),
-  _count_marked_bytes(NULL) {
+  _count_marked_bytes(NULL),
+  _completed_initialization(false) {
   CMVerboseLevel verbose_level = (CMVerboseLevel) G1MarkingVerboseLevel;
   if (verbose_level < no_verbose) {
     verbose_level = no_verbose;
@@ -464,61 +533,34 @@
                            "heap end = "PTR_FORMAT, _heap_start, _heap_end);
   }
 
-  _markStack.allocate(MarkStackSize);
+  if (!_markBitMap1.allocate(heap_rs)) {
+    warning("Failed to allocate first CM bit map");
+    return;
+  }
+  if (!_markBitMap2.allocate(heap_rs)) {
+    warning("Failed to allocate second CM bit map");
+    return;
+  }
 
   // Create & start a ConcurrentMark thread.
   _cmThread = new ConcurrentMarkThread(this);
   assert(cmThread() != NULL, "CM Thread should have been created");
   assert(cmThread()->cm() != NULL, "CM Thread should refer to this cm");
 
-  _g1h = G1CollectedHeap::heap();
   assert(CGC_lock != NULL, "Where's the CGC_lock?");
-  assert(_markBitMap1.covers(rs), "_markBitMap1 inconsistency");
-  assert(_markBitMap2.covers(rs), "_markBitMap2 inconsistency");
+  assert(_markBitMap1.covers(heap_rs), "_markBitMap1 inconsistency");
+  assert(_markBitMap2.covers(heap_rs), "_markBitMap2 inconsistency");
 
   SATBMarkQueueSet& satb_qs = JavaThread::satb_mark_queue_set();
   satb_qs.set_buffer_size(G1SATBBufferSize);
 
   _root_regions.init(_g1h, this);
 
-  _tasks = NEW_C_HEAP_ARRAY(CMTask*, _max_worker_id, mtGC);
-  _accum_task_vtime = NEW_C_HEAP_ARRAY(double, _max_worker_id, mtGC);
-
-  _count_card_bitmaps = NEW_C_HEAP_ARRAY(BitMap,  _max_worker_id, mtGC);
-  _count_marked_bytes = NEW_C_HEAP_ARRAY(size_t*, _max_worker_id, mtGC);
-
-  BitMap::idx_t card_bm_size = _card_bm.size();
-
-  // so that the assertion in MarkingTaskQueue::task_queue doesn't fail
-  _active_tasks = _max_worker_id;
-  for (uint i = 0; i < _max_worker_id; ++i) {
-    CMTaskQueue* task_queue = new CMTaskQueue();
-    task_queue->initialize();
-    _task_queues->register_queue(i, task_queue);
-
-    _count_card_bitmaps[i] = BitMap(card_bm_size, false);
-    _count_marked_bytes[i] = NEW_C_HEAP_ARRAY(size_t, (size_t) max_regions, mtGC);
-
-    _tasks[i] = new CMTask(i, this,
-                           _count_marked_bytes[i],
-                           &_count_card_bitmaps[i],
-                           task_queue, _task_queues);
-
-    _accum_task_vtime[i] = 0.0;
-  }
-
-  // Calculate the card number for the bottom of the heap. Used
-  // in biasing indexes into the accounting card bitmaps.
-  _heap_bottom_card_num =
-    intptr_t(uintptr_t(_g1h->reserved_region().start()) >>
-                                CardTableModRefBS::card_shift);
-
-  // Clear all the liveness counting data
-  clear_all_count_data();
-
   if (ConcGCThreads > ParallelGCThreads) {
-    vm_exit_during_initialization("Can't have more ConcGCThreads "
-                                  "than ParallelGCThreads.");
+    warning("Can't have more ConcGCThreads (" UINT32_FORMAT ") "
+            "than ParallelGCThreads (" UINT32_FORMAT ").",
+            ConcGCThreads, ParallelGCThreads);
+    return;
   }
   if (ParallelGCThreads == 0) {
     // if we are not running with any parallel GC threads we will not
@@ -590,9 +632,86 @@
     }
   }
 
+  if (FLAG_IS_DEFAULT(MarkStackSize)) {
+    uintx mark_stack_size =
+      MIN2(MarkStackSizeMax,
+          MAX2(MarkStackSize, (uintx) (parallel_marking_threads() * TASKQUEUE_SIZE)));
+    // Verify that the calculated value for MarkStackSize is in range.
+    // It would be nice to use the private utility routine from Arguments.
+    if (!(mark_stack_size >= 1 && mark_stack_size <= MarkStackSizeMax)) {
+      warning("Invalid value calculated for MarkStackSize (" UINTX_FORMAT "): "
+              "must be between " UINTX_FORMAT " and " UINTX_FORMAT,
+              mark_stack_size, 1, MarkStackSizeMax);
+      return;
+    }
+    FLAG_SET_ERGO(uintx, MarkStackSize, mark_stack_size);
+  } else {
+    // Verify MarkStackSize is in range.
+    if (FLAG_IS_CMDLINE(MarkStackSize)) {
+      if (FLAG_IS_DEFAULT(MarkStackSizeMax)) {
+        if (!(MarkStackSize >= 1 && MarkStackSize <= MarkStackSizeMax)) {
+          warning("Invalid value specified for MarkStackSize (" UINTX_FORMAT "): "
+                  "must be between " UINTX_FORMAT " and " UINTX_FORMAT,
+                  MarkStackSize, 1, MarkStackSizeMax);
+          return;
+        }
+      } else if (FLAG_IS_CMDLINE(MarkStackSizeMax)) {
+        if (!(MarkStackSize >= 1 && MarkStackSize <= MarkStackSizeMax)) {
+          warning("Invalid value specified for MarkStackSize (" UINTX_FORMAT ")"
+                  " or for MarkStackSizeMax (" UINTX_FORMAT ")",
+                  MarkStackSize, MarkStackSizeMax);
+          return;
+        }
+      }
+    }
+  }
+
+  if (!_markStack.allocate(MarkStackSize)) {
+    warning("Failed to allocate CM marking stack");
+    return;
+  }
+
+  _tasks = NEW_C_HEAP_ARRAY(CMTask*, _max_worker_id, mtGC);
+  _accum_task_vtime = NEW_C_HEAP_ARRAY(double, _max_worker_id, mtGC);
+
+  _count_card_bitmaps = NEW_C_HEAP_ARRAY(BitMap,  _max_worker_id, mtGC);
+  _count_marked_bytes = NEW_C_HEAP_ARRAY(size_t*, _max_worker_id, mtGC);
+
+  BitMap::idx_t card_bm_size = _card_bm.size();
+
+  // so that the assertion in MarkingTaskQueue::task_queue doesn't fail
+  _active_tasks = _max_worker_id;
+
+  size_t max_regions = (size_t) _g1h->max_regions();
+  for (uint i = 0; i < _max_worker_id; ++i) {
+    CMTaskQueue* task_queue = new CMTaskQueue();
+    task_queue->initialize();
+    _task_queues->register_queue(i, task_queue);
+
+    _count_card_bitmaps[i] = BitMap(card_bm_size, false);
+    _count_marked_bytes[i] = NEW_C_HEAP_ARRAY(size_t, max_regions, mtGC);
+
+    _tasks[i] = new CMTask(i, this,
+                           _count_marked_bytes[i],
+                           &_count_card_bitmaps[i],
+                           task_queue, _task_queues);
+
+    _accum_task_vtime[i] = 0.0;
+  }
+
+  // Calculate the card number for the bottom of the heap. Used
+  // in biasing indexes into the accounting card bitmaps.
+  _heap_bottom_card_num =
+    intptr_t(uintptr_t(_g1h->reserved_region().start()) >>
+                                CardTableModRefBS::card_shift);
+
+  // Clear all the liveness counting data
+  clear_all_count_data();
+
   // so that the call below can read a sensible value
-  _heap_start = (HeapWord*) rs.base();
+  _heap_start = (HeapWord*) heap_rs.base();
   set_non_marking_state();
+  _completed_initialization = true;
 }
 
 void ConcurrentMark::update_g1_committed(bool force) {
@@ -1165,6 +1284,11 @@
     assert(!restart_for_overflow(), "sanity");
   }
 
+  // Expand the marking stack, if we have to and if we can.
+  if (_markStack.should_expand()) {
+    _markStack.expand();
+  }
+
   // Reset the marking state if marking completed
   if (!restart_for_overflow()) {
     set_non_marking_state();
@@ -2785,7 +2909,7 @@
     // Verify entries on the task queues
     for (uint i = 0; i < _max_worker_id; i += 1) {
       cl.set_phase(VerifyNoCSetOopsQueues, i);
-      OopTaskQueue* queue = _task_queues->queue(i);
+      CMTaskQueue* queue = _task_queues->queue(i);
       queue->oops_do(&cl);
     }
   }
@@ -2840,8 +2964,8 @@
 #endif // PRODUCT
 
 void ConcurrentMark::clear_marking_state(bool clear_overflow) {
-  _markStack.setEmpty();
-  _markStack.clear_overflow();
+  _markStack.set_should_expand();
+  _markStack.setEmpty();        // Also clears the _markStack overflow flag
   if (clear_overflow) {
     clear_has_overflown();
   } else {
@@ -2850,7 +2974,7 @@
   _finger = _heap_start;
 
   for (uint i = 0; i < _max_worker_id; ++i) {
-    OopTaskQueue* queue = _task_queues->queue(i);
+    CMTaskQueue* queue = _task_queues->queue(i);
     queue->set_empty();
   }
 }
--- a/src/share/vm/gc_implementation/g1/concurrentMark.hpp	Thu Dec 13 09:05:20 2012 -0800
+++ b/src/share/vm/gc_implementation/g1/concurrentMark.hpp	Fri Dec 14 14:19:35 2012 -0800
@@ -63,7 +63,7 @@
 
  public:
   // constructor
-  CMBitMapRO(ReservedSpace rs, int shifter);
+  CMBitMapRO(int shifter);
 
   enum { do_yield = true };
 
@@ -117,8 +117,11 @@
 
  public:
   // constructor
-  CMBitMap(ReservedSpace rs, int shifter) :
-    CMBitMapRO(rs, shifter) {}
+  CMBitMap(int shifter) :
+    CMBitMapRO(shifter) {}
+
+  // Allocates the back store for the marking bitmap
+  bool allocate(ReservedSpace heap_rs);
 
   // write marks
   void mark(HeapWord* addr) {
@@ -155,17 +158,18 @@
   MemRegion getAndClearMarkedRegion(HeapWord* addr, HeapWord* end_addr);
 };
 
-// Represents a marking stack used by the CM collector.
-// Ideally this should be GrowableArray<> just like MSC's marking stack(s).
+// Represents a marking stack used by ConcurrentMarking in the G1 collector.
 class CMMarkStack VALUE_OBJ_CLASS_SPEC {
+  VirtualSpace _virtual_space;   // Underlying backing store for actual stack
   ConcurrentMark* _cm;
   oop*   _base;        // bottom of stack
-  jint   _index;       // one more than last occupied index
-  jint   _capacity;    // max #elements
-  jint   _saved_index; // value of _index saved at start of GC
-  NOT_PRODUCT(jint _max_depth;)  // max depth plumbed during run
+  jint _index;       // one more than last occupied index
+  jint _capacity;    // max #elements
+  jint _saved_index; // value of _index saved at start of GC
+  NOT_PRODUCT(jint _max_depth;)   // max depth plumbed during run
 
-  bool   _overflow;
+  bool  _overflow;
+  bool  _should_expand;
   DEBUG_ONLY(bool _drain_in_progress;)
   DEBUG_ONLY(bool _drain_in_progress_yields;)
 
@@ -173,7 +177,13 @@
   CMMarkStack(ConcurrentMark* cm);
   ~CMMarkStack();
 
-  void allocate(size_t size);
+#ifndef PRODUCT
+  jint max_depth() const {
+    return _max_depth;
+  }
+#endif
+
+  bool allocate(size_t capacity);
 
   oop pop() {
     if (!isEmpty()) {
@@ -231,11 +241,17 @@
 
   bool isEmpty()    { return _index == 0; }
   bool isFull()     { return _index == _capacity; }
-  int maxElems()    { return _capacity; }
+  int  maxElems()   { return _capacity; }
 
   bool overflow() { return _overflow; }
   void clear_overflow() { _overflow = false; }
 
+  bool should_expand() const { return _should_expand; }
+  void set_should_expand();
+
+  // Expand the stack, typically in response to an overflow condition
+  void expand();
+
   int  size() { return _index; }
 
   void setEmpty()   { _index = 0; clear_overflow(); }
@@ -344,6 +360,7 @@
 class ConcurrentMarkThread;
 
 class ConcurrentMark: public CHeapObj<mtGC> {
+  friend class CMMarkStack;
   friend class ConcurrentMarkThread;
   friend class CMTask;
   friend class CMBitMapClosure;
@@ -577,6 +594,9 @@
   // the card bitmaps.
   intptr_t _heap_bottom_card_num;
 
+  // Set to true when initialization is complete
+  bool _completed_initialization;
+
 public:
   // Manipulation of the global mark stack.
   // Notice that the first mark_stack_push is CAS-based, whereas the
@@ -636,7 +656,7 @@
     return _task_queues->steal(worker_id, hash_seed, obj);
   }
 
-  ConcurrentMark(ReservedSpace rs, uint max_regions);
+  ConcurrentMark(G1CollectedHeap* g1h, ReservedSpace heap_rs);
   ~ConcurrentMark();
 
   ConcurrentMarkThread* cmThread() { return _cmThread; }
@@ -907,6 +927,11 @@
   // Should *not* be called from parallel code.
   inline bool mark_and_count(oop obj);
 
+  // Returns true if initialization was successfully completed.
+  bool completed_initialization() const {
+    return _completed_initialization;
+  }
+
 protected:
   // Clear all the per-task bitmaps and arrays used to store the
   // counting data.
--- a/src/share/vm/gc_implementation/g1/g1CollectedHeap.cpp	Thu Dec 13 09:05:20 2012 -0800
+++ b/src/share/vm/gc_implementation/g1/g1CollectedHeap.cpp	Fri Dec 14 14:19:35 2012 -0800
@@ -2079,7 +2079,11 @@
 
   // Create the ConcurrentMark data structure and thread.
   // (Must do this late, so that "max_regions" is defined.)
-  _cm       = new ConcurrentMark(heap_rs, max_regions());
+  _cm = new ConcurrentMark(this, heap_rs);
+  if (_cm == NULL || !_cm->completed_initialization()) {
+    vm_shutdown_during_initialization("Could not create/initialize ConcurrentMark");
+    return JNI_ENOMEM;
+  }
   _cmThread = _cm->cmThread();
 
   // Initialize the from_card cache structure of HeapRegionRemSet.
@@ -2087,7 +2091,7 @@
 
   // Now expand into the initial heap size.
   if (!expand(init_byte_size)) {
-    vm_exit_during_initialization("Failed to allocate initial heap.");
+    vm_shutdown_during_initialization("Failed to allocate initial heap.");
     return JNI_ENOMEM;
   }
 
--- a/src/share/vm/gc_implementation/parallelScavenge/adjoiningVirtualSpaces.cpp	Thu Dec 13 09:05:20 2012 -0800
+++ b/src/share/vm/gc_implementation/parallelScavenge/adjoiningVirtualSpaces.cpp	Fri Dec 14 14:19:35 2012 -0800
@@ -24,6 +24,7 @@
 
 #include "precompiled.hpp"
 #include "gc_implementation/parallelScavenge/adjoiningVirtualSpaces.hpp"
+#include "memory/allocation.inline.hpp"
 #include "runtime/java.hpp"
 
 AdjoiningVirtualSpaces::AdjoiningVirtualSpaces(ReservedSpace rs,
--- a/src/share/vm/gc_implementation/shared/gcStats.cpp	Thu Dec 13 09:05:20 2012 -0800
+++ b/src/share/vm/gc_implementation/shared/gcStats.cpp	Fri Dec 14 14:19:35 2012 -0800
@@ -25,6 +25,7 @@
 #include "precompiled.hpp"
 #include "gc_implementation/shared/gcStats.hpp"
 #include "gc_implementation/shared/gcUtil.hpp"
+#include "memory/allocation.inline.hpp"
 
 GCStats::GCStats() {
     _avg_promoted       = new AdaptivePaddedNoZeroDevAverage(
--- a/src/share/vm/oops/constMethod.hpp	Thu Dec 13 09:05:20 2012 -0800
+++ b/src/share/vm/oops/constMethod.hpp	Fri Dec 14 14:19:35 2012 -0800
@@ -46,6 +46,7 @@
 // | interp_kind  | flags    | code_size                  |
 // | name index              | signature index            |
 // | method_idnum            | max_stack                  |
+// | max_locals              | size_of_parameters         |
 // |------------------------------------------------------|
 // |                                                      |
 // | byte codes                                           |
@@ -150,7 +151,8 @@
                                                  // initially corresponds to the index into the methods array.
                                                  // but this may change with redefinition
   u2                _max_stack;                  // Maximum number of entries on the expression stack
-
+  u2                _max_locals;                 // Number of local variables used by this method
+  u2                _size_of_parameters;         // size of the parameter block (receiver + arguments) in words
 
   // Constructor
   ConstMethod(int byte_code_size,
@@ -338,6 +340,11 @@
 
   static ByteSize max_stack_offset()
                             { return byte_offset_of(ConstMethod, _max_stack); }
+  static ByteSize size_of_locals_offset()
+                            { return byte_offset_of(ConstMethod, _max_locals); }
+  static ByteSize size_of_parameters_offset()
+                            { return byte_offset_of(ConstMethod, _size_of_parameters); }
+
 
   // Unique id for the method
   static const u2 MAX_IDNUM;
@@ -349,6 +356,14 @@
   int  max_stack() const                         { return _max_stack; }
   void set_max_stack(int size)                   { _max_stack = size; }
 
+  // max locals
+  int  max_locals() const                        { return _max_locals; }
+  void set_max_locals(int size)                  { _max_locals = size; }
+
+  // size of parameters
+  int  size_of_parameters() const                { return _size_of_parameters; }
+  void set_size_of_parameters(int size)          { _size_of_parameters = size; }
+
   // Deallocation for RedefineClasses
   void deallocate_contents(ClassLoaderData* loader_data);
   bool is_klass() const { return false; }
--- a/src/share/vm/oops/method.hpp	Thu Dec 13 09:05:20 2012 -0800
+++ b/src/share/vm/oops/method.hpp	Fri Dec 14 14:19:35 2012 -0800
@@ -73,8 +73,7 @@
 // |------------------------------------------------------|
 // | result_index (C++ interpreter only)                  |
 // |------------------------------------------------------|
-// | method_size             |   max_locals               |
-// | size_of_parameters      |   intrinsic_id|   flags    |
+// | method_size             |   intrinsic_id|   flags    |
 // |------------------------------------------------------|
 // | throwout_count          |   num_breakpoints          |
 // |------------------------------------------------------|
@@ -116,8 +115,6 @@
   int               _result_index;               // C++ interpreter needs for converting results to/from stack
 #endif
   u2                _method_size;                // size of this object
-  u2                _max_locals;                 // Number of local variables used by this method
-  u2                _size_of_parameters;         // size of the parameter block (receiver + arguments) in words
   u1                _intrinsic_id;               // vmSymbols::intrinsic_id (0 == _none)
   u1                _jfr_towrite  : 1,           // Flags
                     _force_inline : 1,
@@ -292,8 +289,8 @@
   void      set_max_stack(int size)              {        constMethod()->set_max_stack(size); }
 
   // max locals
-  int  max_locals() const                        { return _max_locals; }
-  void set_max_locals(int size)                  { _max_locals = size; }
+  int  max_locals() const                        { return constMethod()->max_locals(); }
+  void set_max_locals(int size)                  { constMethod()->set_max_locals(size); }
 
   int highest_comp_level() const;
   void set_highest_comp_level(int level);
@@ -311,7 +308,8 @@
   void set_interpreter_throwout_count(int count) { _interpreter_throwout_count = count; }
 
   // size of parameters
-  int  size_of_parameters() const                { return _size_of_parameters; }
+  int  size_of_parameters() const                { return constMethod()->size_of_parameters(); }
+  void set_size_of_parameters(int size)          { constMethod()->set_size_of_parameters(size); }
 
   bool has_stackmap_table() const {
     return constMethod()->has_stackmap_table();
@@ -588,8 +586,6 @@
 #ifdef CC_INTERP
   static ByteSize result_index_offset()          { return byte_offset_of(Method, _result_index ); }
 #endif /* CC_INTERP */
-  static ByteSize size_of_locals_offset()        { return byte_offset_of(Method, _max_locals        ); }
-  static ByteSize size_of_parameters_offset()    { return byte_offset_of(Method, _size_of_parameters); }
   static ByteSize from_compiled_offset()         { return byte_offset_of(Method, _from_compiled_entry); }
   static ByteSize code_offset()                  { return byte_offset_of(Method, _code); }
   static ByteSize invocation_counter_offset()    { return byte_offset_of(Method, _invocation_counter); }
@@ -796,9 +792,6 @@
                            Array<AnnotationArray*>* methods_default_annotations,
                            bool idempotent = false);
 
-  // size of parameters
-  void set_size_of_parameters(int size)          { _size_of_parameters = size; }
-
   // Deallocation function for redefine classes or if an error occurs
   void deallocate_contents(ClassLoaderData* loader_data);
 
--- a/src/share/vm/runtime/arguments.cpp	Thu Dec 13 09:05:20 2012 -0800
+++ b/src/share/vm/runtime/arguments.cpp	Fri Dec 14 14:19:35 2012 -0800
@@ -1499,13 +1499,12 @@
                      Abstract_VM_Version::parallel_worker_threads());
   }
 
-  if (FLAG_IS_DEFAULT(MarkStackSize)) {
-    FLAG_SET_DEFAULT(MarkStackSize, 128 * TASKQUEUE_SIZE);
-  }
-  if (PrintGCDetails && Verbose) {
-    tty->print_cr("MarkStackSize: %uk  MarkStackSizeMax: %uk",
-      MarkStackSize / K, MarkStackSizeMax / K);
-    tty->print_cr("ConcGCThreads: %u", ConcGCThreads);
+  // MarkStackSize will be set (if it hasn't been set by the user)
+  // when concurrent marking is initialized.
+  // Its value will be based upon the number of parallel marking threads.
+  // But we do set the maximum mark stack size here.
+  if (FLAG_IS_DEFAULT(MarkStackSizeMax)) {
+    FLAG_SET_DEFAULT(MarkStackSizeMax, 128 * TASKQUEUE_SIZE);
   }
 
   if (FLAG_IS_DEFAULT(GCTimeRatio) || GCTimeRatio == 0) {
@@ -1517,6 +1516,12 @@
     // is allocation). We might consider increase it further.
     FLAG_SET_DEFAULT(GCTimeRatio, 9);
   }
+
+  if (PrintGCDetails && Verbose) {
+    tty->print_cr("MarkStackSize: %uk  MarkStackSizeMax: %uk",
+      MarkStackSize / K, MarkStackSizeMax / K);
+    tty->print_cr("ConcGCThreads: %u", ConcGCThreads);
+  }
 }
 
 void Arguments::set_heap_size() {
@@ -1980,6 +1985,9 @@
   status = status && verify_min_value(ClassMetaspaceSize, 1*M,
                                       "ClassMetaspaceSize");
 
+  status = status && verify_interval(MarkStackSizeMax,
+                                  1, (max_jint - 1), "MarkStackSizeMax");
+
 #ifdef SPARC
   if (UseConcMarkSweepGC || UseG1GC) {
     // Issue a stern warning if the user has explicitly set
--- a/src/share/vm/runtime/vmStructs.cpp	Thu Dec 13 09:05:20 2012 -0800
+++ b/src/share/vm/runtime/vmStructs.cpp	Fri Dec 14 14:19:35 2012 -0800
@@ -355,8 +355,6 @@
   nonstatic_field(Method,               _access_flags,                                 AccessFlags)                           \
   nonstatic_field(Method,               _vtable_index,                                 int)                                   \
   nonstatic_field(Method,               _method_size,                                  u2)                                    \
-  nonstatic_field(Method,               _max_locals,                                   u2)                                    \
-  nonstatic_field(Method,               _size_of_parameters,                           u2)                                    \
   nonstatic_field(Method,               _interpreter_throwout_count,                   u2)                                    \
   nonstatic_field(Method,               _number_of_breakpoints,                        u2)                                    \
   nonstatic_field(Method,               _invocation_counter,                           InvocationCounter)                     \
@@ -378,6 +376,8 @@
   nonstatic_field(ConstMethod,          _signature_index,                              u2)                                    \
   nonstatic_field(ConstMethod,          _method_idnum,                                 u2)                                    \
   nonstatic_field(ConstMethod,          _max_stack,                                    u2)                                    \
+  nonstatic_field(ConstMethod,          _max_locals,                                   u2)                                    \
+  nonstatic_field(ConstMethod,          _size_of_parameters,                           u2)                                    \
   nonstatic_field(ObjArrayKlass,               _element_klass,                                Klass*)                                \
   nonstatic_field(ObjArrayKlass,               _bottom_klass,                                 Klass*)                                \
   volatile_nonstatic_field(Symbol,             _refcount,                                     int)                                   \