4930919: race condition in MDO creation at back branch locations

Summary: Reuse set_method_data_for_bcp() to setup mdp after MDO creation.
Reviewed-by: kvn, never

src/cpu/sparc/vm/interp_masm_sparc.cpp

 /*
- * Copyright (c) 1997, 2010, Oracle and/or its affiliates. All rights reserved.
+ * Copyright (c) 1997, 2011, Oracle and/or its affiliates. All rights reserved.
  * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
  *
  * This code is free software; you can redistribute it and/or modify it
@@ -1295,16 +1295,13 @@ void InterpreterMacroAssembler::unlock_object(Register lock_reg) {
 // Get the method data pointer from the methodOop and set the
 // specified register to its value.
 
-void InterpreterMacroAssembler::set_method_data_pointer_offset(Register Roff) {
+void InterpreterMacroAssembler::set_method_data_pointer() {
   assert(ProfileInterpreter, "must be profiling interpreter");
   Label get_continue;
 
   ld_ptr(Lmethod, in_bytes(methodOopDesc::method_data_offset()), ImethodDataPtr);
   test_method_data_pointer(get_continue);
   add(ImethodDataPtr, in_bytes(methodDataOopDesc::data_offset()), ImethodDataPtr);
-  if (Roff != noreg)
-    // Roff contains a method data index ("mdi").  It defaults to zero.
-    add(ImethodDataPtr, Roff, ImethodDataPtr);
   bind(get_continue);
 }
 
@@ -1315,10 +1312,11 @@ void InterpreterMacroAssembler::set_method_data_pointer_for_bcp() {
   Label zero_continue;
 
   // Test MDO to avoid the call if it is NULL.
-  ld_ptr(Lmethod, methodOopDesc::method_data_offset(), ImethodDataPtr);
+  ld_ptr(Lmethod, in_bytes(methodOopDesc::method_data_offset()), ImethodDataPtr);
   test_method_data_pointer(zero_continue);
   call_VM_leaf(noreg, CAST_FROM_FN_PTR(address, InterpreterRuntime::bcp_to_di), Lmethod, Lbcp);
-  set_method_data_pointer_offset(O0);
+  add(ImethodDataPtr, in_bytes(methodDataOopDesc::data_offset()), ImethodDataPtr);
+  add(ImethodDataPtr, O0, ImethodDataPtr);
   bind(zero_continue);
 }
 
@@ -1369,7 +1367,6 @@ void InterpreterMacroAssembler::verify_method_data_pointer() {
 }
 
 void InterpreterMacroAssembler::test_invocation_counter_for_mdp(Register invocation_count,
-                                                                Register cur_bcp,
                                                                 Register Rtmp,
                                                                 Label &profile_continue) {
   assert(ProfileInterpreter, "must be profiling interpreter");
@@ -1400,8 +1397,8 @@ void InterpreterMacroAssembler::test_invocation_counter_for_mdp(Register invocat
   delayed()->nop();
 
   // Build it now.
-  call_VM(noreg, CAST_FROM_FN_PTR(address, InterpreterRuntime::profile_method), cur_bcp);
-  set_method_data_pointer_offset(O0);
+  call_VM(noreg, CAST_FROM_FN_PTR(address, InterpreterRuntime::profile_method));
+  set_method_data_pointer_for_bcp();
   ba(false, profile_continue);
   delayed()->nop();
   bind(done);

src/cpu/sparc/vm/interp_masm_sparc.hpp

 /*
- * Copyright (c) 1997, 2010, Oracle and/or its affiliates. All rights reserved.
+ * Copyright (c) 1997, 2011, Oracle and/or its affiliates. All rights reserved.
  * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
  *
  * This code is free software; you can redistribute it and/or modify it
@@ -269,12 +269,11 @@ class InterpreterMacroAssembler: public MacroAssembler {
 
 #ifndef CC_INTERP
   // Interpreter profiling operations
-  void set_method_data_pointer() { set_method_data_pointer_offset(noreg); }
+  void set_method_data_pointer();
   void set_method_data_pointer_for_bcp();
-  void set_method_data_pointer_offset(Register mdi_reg);
   void test_method_data_pointer(Label& zero_continue);
   void verify_method_data_pointer();
-  void test_invocation_counter_for_mdp(Register invocation_count, Register cur_bcp, Register Rtmp, Label &profile_continue);
+  void test_invocation_counter_for_mdp(Register invocation_count, Register Rtmp, Label &profile_continue);
 
   void set_mdp_data_at(int constant, Register value);
   void increment_mdp_data_at(Address counter, Register bumped_count,

src/cpu/sparc/vm/templateInterpreter_sparc.cpp

 /*
- * Copyright (c) 1997, 2010, Oracle and/or its affiliates. All rights reserved.
+ * Copyright (c) 1997, 2011, Oracle and/or its affiliates. All rights reserved.
  * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
  *
  * This code is free software; you can redistribute it and/or modify it
@@ -1364,15 +1364,8 @@ address InterpreterGenerator::generate_normal_entry(bool synchronized) {
       // We have decided to profile this method in the interpreter
       __ bind(profile_method);
 
-      __ call_VM(noreg, CAST_FROM_FN_PTR(address, InterpreterRuntime::profile_method), Lbcp, true);
-
-#ifdef ASSERT
-      __ tst(O0);
-      __ breakpoint_trap(Assembler::notEqual);
-#endif
-
-      __ set_method_data_pointer();
-
+      __ call_VM(noreg, CAST_FROM_FN_PTR(address, InterpreterRuntime::profile_method));
+      __ set_method_data_pointer_for_bcp();
       __ ba(false, profile_method_continue);
       __ delayed()->nop();
     }

src/cpu/sparc/vm/templateTable_sparc.cpp

 /*
- * Copyright (c) 1997, 2010, Oracle and/or its affiliates. All rights reserved.
+ * Copyright (c) 1997, 2011, Oracle and/or its affiliates. All rights reserved.
  * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
  *
  * This code is free software; you can redistribute it and/or modify it
@@ -1689,7 +1689,7 @@ void TemplateTable::branch(bool is_jsr, bool is_wide) {
       const Register G4_invoke_ctr = G4;
       __ increment_backedge_counter(G4_invoke_ctr, G1_scratch);
       if (ProfileInterpreter) {
-        __ test_invocation_counter_for_mdp(G4_invoke_ctr, Lbcp, G3_scratch, Lforward);
+        __ test_invocation_counter_for_mdp(G4_invoke_ctr, G3_scratch, Lforward);
         if (UseOnStackReplacement) {
           __ test_backedge_count_for_osr(O2_bumped_count, O0_cur_bcp, G3_scratch);
         }

src/cpu/x86/vm/interp_masm_x86_32.cpp

 /*
- * Copyright (c) 1997, 2010, Oracle and/or its affiliates. All rights reserved.
+ * Copyright (c) 1997, 2011, Oracle and/or its affiliates. All rights reserved.
  * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
  *
  * This code is free software; you can redistribute it and/or modify it
@@ -819,7 +819,7 @@ void InterpreterMacroAssembler::test_method_data_pointer(Register mdp, Label& ze
 // Set the method data pointer for the current bcp.
 void InterpreterMacroAssembler::set_method_data_pointer_for_bcp() {
   assert(ProfileInterpreter, "must be profiling interpreter");
-  Label zero_continue;
+  Label set_mdp;
   push(rax);
   push(rbx);
 
@@ -827,21 +827,17 @@ void InterpreterMacroAssembler::set_method_data_pointer_for_bcp() {
   // Test MDO to avoid the call if it is NULL.
   movptr(rax, Address(rbx, in_bytes(methodOopDesc::method_data_offset())));
   testptr(rax, rax);
-  jcc(Assembler::zero, zero_continue);
-
+  jcc(Assembler::zero, set_mdp);
   // rbx,: method
   // rsi: bcp
   call_VM_leaf(CAST_FROM_FN_PTR(address, InterpreterRuntime::bcp_to_di), rbx, rsi);
   // rax,: mdi
-
+  // mdo is guaranteed to be non-zero here, we checked for it before the call.
   movptr(rbx, Address(rbx, in_bytes(methodOopDesc::method_data_offset())));
-  testptr(rbx, rbx);
-  jcc(Assembler::zero, zero_continue);
   addptr(rbx, in_bytes(methodDataOopDesc::data_offset()));
-  addptr(rbx, rax);
-  movptr(Address(rbp, frame::interpreter_frame_mdx_offset * wordSize), rbx);
-
-  bind(zero_continue);
+  addptr(rax, rbx);
+  bind(set_mdp);
+  movptr(Address(rbp, frame::interpreter_frame_mdx_offset * wordSize), rax);
   pop(rbx);
   pop(rax);
 }

src/cpu/x86/vm/interp_masm_x86_64.cpp

 /*
- * Copyright (c) 2003, 2010, Oracle and/or its affiliates. All rights reserved.
+ * Copyright (c) 2003, 2011, Oracle and/or its affiliates. All rights reserved.
  * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
  *
  * This code is free software; you can redistribute it and/or modify it
@@ -855,7 +855,7 @@ void InterpreterMacroAssembler::test_method_data_pointer(Register mdp,
 // Set the method data pointer for the current bcp.
 void InterpreterMacroAssembler::set_method_data_pointer_for_bcp() {
   assert(ProfileInterpreter, "must be profiling interpreter");
-  Label zero_continue;
+  Label set_mdp;
   push(rax);
   push(rbx);
 
@@ -863,21 +863,17 @@ void InterpreterMacroAssembler::set_method_data_pointer_for_bcp() {
   // Test MDO to avoid the call if it is NULL.
   movptr(rax, Address(rbx, in_bytes(methodOopDesc::method_data_offset())));
   testptr(rax, rax);
-  jcc(Assembler::zero, zero_continue);
-
+  jcc(Assembler::zero, set_mdp);
   // rbx: method
   // r13: bcp
   call_VM_leaf(CAST_FROM_FN_PTR(address, InterpreterRuntime::bcp_to_di), rbx, r13);
   // rax: mdi
-
+  // mdo is guaranteed to be non-zero here, we checked for it before the call.
   movptr(rbx, Address(rbx, in_bytes(methodOopDesc::method_data_offset())));
-  testptr(rbx, rbx);
-  jcc(Assembler::zero, zero_continue);
   addptr(rbx, in_bytes(methodDataOopDesc::data_offset()));
-  addptr(rbx, rax);
-  movptr(Address(rbp, frame::interpreter_frame_mdx_offset * wordSize), rbx);
-
-  bind(zero_continue);
+  addptr(rax, rbx);
+  bind(set_mdp);
+  movptr(Address(rbp, frame::interpreter_frame_mdx_offset * wordSize), rax);
   pop(rbx);
   pop(rax);
 }

src/cpu/x86/vm/templateInterpreter_x86_32.cpp

 /*
- * Copyright (c) 1997, 2010, Oracle and/or its affiliates. All rights reserved.
+ * Copyright (c) 1997, 2011, Oracle and/or its affiliates. All rights reserved.
  * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
  *
  * This code is free software; you can redistribute it and/or modify it
@@ -1367,15 +1367,8 @@ address InterpreterGenerator::generate_normal_entry(bool synchronized) {
     if (ProfileInterpreter) {
       // We have decided to profile this method in the interpreter
       __ bind(profile_method);
-
-      __ call_VM(noreg, CAST_FROM_FN_PTR(address, InterpreterRuntime::profile_method), rsi, true);
-
-      __ movptr(rbx, Address(rbp, method_offset));   // restore methodOop
-      __ movptr(rax, Address(rbx, in_bytes(methodOopDesc::method_data_offset())));
-      __ movptr(Address(rbp, frame::interpreter_frame_mdx_offset * wordSize), rax);
-      __ test_method_data_pointer(rax, profile_method_continue);
-      __ addptr(rax, in_bytes(methodDataOopDesc::data_offset()));
-      __ movptr(Address(rbp, frame::interpreter_frame_mdx_offset * wordSize), rax);
+      __ call_VM(noreg, CAST_FROM_FN_PTR(address, InterpreterRuntime::profile_method));
+      __ set_method_data_pointer_for_bcp();
       __ jmp(profile_method_continue);
     }
     // Handle overflow of counter and compile method

src/cpu/x86/vm/templateInterpreter_x86_64.cpp

 /*
- * Copyright (c) 2003, 2010, Oracle and/or its affiliates. All rights reserved.
+ * Copyright (c) 2003, 2011, Oracle and/or its affiliates. All rights reserved.
  * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
  *
  * This code is free software; you can redistribute it and/or modify it
@@ -1383,20 +1383,8 @@ address InterpreterGenerator::generate_normal_entry(bool synchronized) {
     if (ProfileInterpreter) {
       // We have decided to profile this method in the interpreter
       __ bind(profile_method);
-
-      __ call_VM(noreg,
-                 CAST_FROM_FN_PTR(address, InterpreterRuntime::profile_method),
-                 r13, true);
-
-      __ movptr(rbx, Address(rbp, method_offset)); // restore methodOop
-      __ movptr(rax, Address(rbx,
-                             in_bytes(methodOopDesc::method_data_offset())));
-      __ movptr(Address(rbp, frame::interpreter_frame_mdx_offset * wordSize),
-                rax);
-      __ test_method_data_pointer(rax, profile_method_continue);
-      __ addptr(rax, in_bytes(methodDataOopDesc::data_offset()));
-      __ movptr(Address(rbp, frame::interpreter_frame_mdx_offset * wordSize),
-              rax);
+      __ call_VM(noreg, CAST_FROM_FN_PTR(address, InterpreterRuntime::profile_method));
+      __ set_method_data_pointer_for_bcp();
       __ jmp(profile_method_continue);
     }
     // Handle overflow of counter and compile method

src/cpu/x86/vm/templateTable_x86_32.cpp

 /*
- * Copyright (c) 1997, 2010, Oracle and/or its affiliates. All rights reserved.
+ * Copyright (c) 1997, 2011, Oracle and/or its affiliates. All rights reserved.
  * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
  *
  * This code is free software; you can redistribute it and/or modify it
@@ -1665,16 +1665,9 @@ void TemplateTable::branch(bool is_jsr, bool is_wide) {
     if (ProfileInterpreter) {
       // Out-of-line code to allocate method data oop.
       __ bind(profile_method);
-      __ call_VM(noreg, CAST_FROM_FN_PTR(address, InterpreterRuntime::profile_method), rsi);
+      __ call_VM(noreg, CAST_FROM_FN_PTR(address, InterpreterRuntime::profile_method));
       __ load_unsigned_byte(rbx, Address(rsi, 0));  // restore target bytecode
-      __ movptr(rcx, Address(rbp, method_offset));
-      __ movptr(rcx, Address(rcx, in_bytes(methodOopDesc::method_data_offset())));
-      __ movptr(Address(rbp, frame::interpreter_frame_mdx_offset * wordSize), rcx);
-      __ test_method_data_pointer(rcx, dispatch);
-      // offset non-null mdp by MDO::data_offset() + IR::profile_method()
-      __ addptr(rcx, in_bytes(methodDataOopDesc::data_offset()));
-      __ addptr(rcx, rax);
-      __ movptr(Address(rbp, frame::interpreter_frame_mdx_offset * wordSize), rcx);
+      __ set_method_data_pointer_for_bcp();
       __ jmp(dispatch);
     }
 

src/cpu/x86/vm/templateTable_x86_64.cpp

 /*
- * Copyright (c) 2003, 2010, Oracle and/or its affiliates. All rights reserved.
+ * Copyright (c) 2003, 2011, Oracle and/or its affiliates. All rights reserved.
  * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
  *
  * This code is free software; you can redistribute it and/or modify it
@@ -1695,21 +1695,9 @@ void TemplateTable::branch(bool is_jsr, bool is_wide) {
     if (ProfileInterpreter) {
       // Out-of-line code to allocate method data oop.
       __ bind(profile_method);
-      __ call_VM(noreg,
-                 CAST_FROM_FN_PTR(address,
-                                  InterpreterRuntime::profile_method), r13);
+      __ call_VM(noreg, CAST_FROM_FN_PTR(address, InterpreterRuntime::profile_method));
       __ load_unsigned_byte(rbx, Address(r13, 0));  // restore target bytecode
-      __ movptr(rcx, Address(rbp, method_offset));
-      __ movptr(rcx, Address(rcx,
-                             in_bytes(methodOopDesc::method_data_offset())));
-      __ movptr(Address(rbp, frame::interpreter_frame_mdx_offset * wordSize),
-                rcx);
-      __ test_method_data_pointer(rcx, dispatch);
-      // offset non-null mdp by MDO::data_offset() + IR::profile_method()
-      __ addptr(rcx, in_bytes(methodDataOopDesc::data_offset()));
-      __ addptr(rcx, rax);
-      __ movptr(Address(rbp, frame::interpreter_frame_mdx_offset * wordSize),
-                rcx);
+      __ set_method_data_pointer_for_bcp();
       __ jmp(dispatch);
     }
 

src/share/vm/interpreter/interpreterRuntime.cpp

 /*
- * Copyright (c) 1997, 2010, Oracle and/or its affiliates. All rights reserved.
+ * Copyright (c) 1997, 2011, Oracle and/or its affiliates. All rights reserved.
  * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
  *
  * This code is free software; you can redistribute it and/or modify it
@@ -884,7 +884,7 @@ IRT_LEAF(jint, InterpreterRuntime::bcp_to_di(methodOopDesc* method, address cur_
   return mdo->bci_to_di(bci);
 IRT_END
 
-IRT_ENTRY(jint, InterpreterRuntime::profile_method(JavaThread* thread, address cur_bcp))
+IRT_ENTRY(void, InterpreterRuntime::profile_method(JavaThread* thread))
   // use UnlockFlagSaver to clear and restore the _do_not_unlock_if_synchronized
   // flag, in case this method triggers classloading which will call into Java.
   UnlockFlagSaver fs(thread);
@@ -893,16 +893,12 @@ IRT_ENTRY(jint, InterpreterRuntime::profile_method(JavaThread* thread, address c
   frame fr = thread->last_frame();
   assert(fr.is_interpreted_frame(), "must come from interpreter");
   methodHandle method(thread, fr.interpreter_frame_method());
-  int bci = method->bci_from(cur_bcp);
   methodOopDesc::build_interpreter_method_data(method, THREAD);
   if (HAS_PENDING_EXCEPTION) {
     assert((PENDING_EXCEPTION->is_a(SystemDictionary::OutOfMemoryError_klass())), "we expect only an OOM error here");
     CLEAR_PENDING_EXCEPTION;
     // and fall through...
   }
-  methodDataOop mdo = method->method_data();
-  if (mdo == NULL)  return 0;
-  return mdo->bci_to_di(bci);
 IRT_END
 
 

src/share/vm/interpreter/interpreterRuntime.hpp

 /*
- * Copyright (c) 1997, 2010, Oracle and/or its affiliates. All rights reserved.
+ * Copyright (c) 1997, 2011, Oracle and/or its affiliates. All rights reserved.
  * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
  *
  * This code is free software; you can redistribute it and/or modify it
@@ -164,7 +164,7 @@ class InterpreterRuntime: AllStatic {
 
   // Interpreter profiling support
   static jint    bcp_to_di(methodOopDesc* method, address cur_bcp);
-  static jint    profile_method(JavaThread* thread, address cur_bcp);
+  static void    profile_method(JavaThread* thread);
   static void    update_mdp_for_ret(JavaThread* thread, int bci);
 #ifdef ASSERT
   static void    verify_mdp(methodOopDesc* method, address bcp, address mdp);