8260369: [PPC64] Add support for JDK-8200555

Reviewed-by: lucy

Author: TheRealMDoerr

src/hotspot/cpu/ppc/interp_masm_ppc.hpp

@@ -77,7 +77,8 @@ class InterpreterMacroAssembler: public MacroAssembler {
                          Register tmp1, Register tmp2, Register tmp3, Label &ok_is_subtype);
 
   // Load object from cpool->resolved_references(index).
-  void load_resolved_reference_at_index(Register result, Register index, Register tmp1, Label *L_handle_null = NULL);
+  void load_resolved_reference_at_index(Register result, Register index, Register tmp1, Register tmp2,
+                                        Label *L_handle_null = NULL);
 
   // load cpool->resolved_klass_at(index)
   void load_resolved_klass_at_offset(Register Rcpool, Register Roffset, Register Rklass);

src/hotspot/cpu/ppc/interp_masm_ppc_64.cpp

@@ -477,33 +477,34 @@ void InterpreterMacroAssembler::get_u4(Register Rdst, Register Rsrc, int offset,
 // Load object from cpool->resolved_references(index).
 // Kills:
 //   - index
-void InterpreterMacroAssembler::load_resolved_reference_at_index(Register result, Register index, Register tmp1,
+void InterpreterMacroAssembler::load_resolved_reference_at_index(Register result, Register index,
+                                                                 Register tmp1, Register tmp2,
                                                                  Label *L_handle_null) {
-  assert_different_registers(result, index);
+  assert_different_registers(result, index, tmp1, tmp2);
+  assert(index->is_nonvolatile(), "needs to survive C-call in resolve_oop_handle");
   get_constant_pool(result);
 
   // Convert from field index to resolved_references() index and from
   // word index to byte offset. Since this is a java object, it can be compressed.
-  Register tmp2 = index;  // reuse
-  sldi(tmp1, index, LogBytesPerHeapOop);
+  sldi(index, index, LogBytesPerHeapOop);
   // Load pointer for resolved_references[] objArray.
   ld(result, ConstantPool::cache_offset_in_bytes(), result);
   ld(result, ConstantPoolCache::resolved_references_offset_in_bytes(), result);
-  resolve_oop_handle(result);
+  resolve_oop_handle(result, tmp1, tmp2, MacroAssembler::PRESERVATION_NONE);
 #ifdef ASSERT
   Label index_ok;
   lwa(R0, arrayOopDesc::length_offset_in_bytes(), result);
   sldi(R0, R0, LogBytesPerHeapOop);
-  cmpd(CCR0, tmp1, R0);
+  cmpd(CCR0, index, R0);
   blt(CCR0, index_ok);
   stop("resolved reference index out of bounds");
   bind(index_ok);
 #endif
   // Add in the index.
-  add(result, tmp1, result);
+  add(result, index, result);
   load_heap_oop(result, arrayOopDesc::base_offset_in_bytes(T_OBJECT), result,
                 tmp1, tmp2,
-                MacroAssembler::PRESERVATION_FRAME_LR,
+                MacroAssembler::PRESERVATION_NONE,
                 0, L_handle_null);
 }
 

src/hotspot/cpu/ppc/macroAssembler_ppc.cpp

@@ -3233,16 +3233,22 @@ void MacroAssembler::load_klass(Register dst, Register src) {
 }
 
 // ((OopHandle)result).resolve();
-void MacroAssembler::resolve_oop_handle(Register result) {
-  // OopHandle::resolve is an indirection.
-  ld(result, 0, result);
+void MacroAssembler::resolve_oop_handle(Register result, Register tmp1, Register tmp2,
+                                        MacroAssembler::PreservationLevel preservation_level) {
+  access_load_at(T_OBJECT, IN_NATIVE, result, noreg, result, tmp1, tmp2, preservation_level);
 }
 
-void MacroAssembler::load_mirror_from_const_method(Register mirror, Register const_method) {
-  ld(mirror, in_bytes(ConstMethod::constants_offset()), const_method);
-  ld(mirror, ConstantPool::pool_holder_offset_in_bytes(), mirror);
-  ld(mirror, in_bytes(Klass::java_mirror_offset()), mirror);
-  resolve_oop_handle(mirror);
+void MacroAssembler::resolve_weak_handle(Register result, Register tmp1, Register tmp2,
+                                         MacroAssembler::PreservationLevel preservation_level) {
+  Label resolved;
+
+  // A null weak handle resolves to null.
+  cmpdi(CCR0, result, 0);
+  beq(CCR0, resolved);
+
+  access_load_at(T_OBJECT, IN_NATIVE | ON_PHANTOM_OOP_REF, result, noreg, result, tmp1, tmp2,
+                 preservation_level);
+  bind(resolved);
 }
 
 void MacroAssembler::load_method_holder(Register holder, Register method) {

src/hotspot/cpu/ppc/macroAssembler_ppc.hpp

@@ -743,8 +743,10 @@ class MacroAssembler: public Assembler {
   void store_klass(Register dst_oop, Register klass, Register tmp = R0);
   void store_klass_gap(Register dst_oop, Register val = noreg); // Will store 0 if val not specified.
 
-  void resolve_oop_handle(Register result);
-  void load_mirror_from_const_method(Register mirror, Register const_method);
+  void resolve_oop_handle(Register result, Register tmp1, Register tmp2,
+                          MacroAssembler::PreservationLevel preservation_level);
+  void resolve_weak_handle(Register result, Register tmp1, Register tmp2,
+                           MacroAssembler::PreservationLevel preservation_level);
   void load_method_holder(Register holder, Register method);
 
   static int instr_size_for_decode_klass_not_null();

src/hotspot/cpu/ppc/templateInterpreterGenerator_ppc.cpp

@@ -933,11 +933,14 @@ void TemplateInterpreterGenerator::lock_method(Register Rflags, Register Rscratc
 // state_size: We save the current state of the interpreter to this area.
 //
 void TemplateInterpreterGenerator::generate_fixed_frame(bool native_call, Register Rsize_of_parameters, Register Rsize_of_locals) {
-  Register parent_frame_resize = R6_ARG4, // Frame will grow by this number of bytes.
-           top_frame_size      = R7_ARG5,
-           Rconst_method       = R8_ARG6;
+  Register Rparent_frame_resize = R6_ARG4, // Frame will grow by this number of bytes.
+           Rtop_frame_size      = R7_ARG5,
+           Rconst_method        = R8_ARG6,
+           Rconst_pool          = R9_ARG7,
+           Rmirror              = R10_ARG8;
 
-  assert_different_registers(Rsize_of_parameters, Rsize_of_locals, parent_frame_resize, top_frame_size);
+  assert_different_registers(Rsize_of_parameters, Rsize_of_locals, Rparent_frame_resize, Rtop_frame_size,
+                             Rconst_method, Rconst_pool);
 
   __ ld(Rconst_method, method_(const));
   __ lhz(Rsize_of_parameters /* number of params */,
@@ -948,51 +951,51 @@ void TemplateInterpreterGenerator::generate_fixed_frame(bool native_call, Regist
     // We add two slots to the parameter_count, one for the jni
     // environment and one for a possible native mirror.
     Label skip_native_calculate_max_stack;
-    __ addi(top_frame_size, Rsize_of_parameters, 2);
-    __ cmpwi(CCR0, top_frame_size, Argument::n_register_parameters);
+    __ addi(Rtop_frame_size, Rsize_of_parameters, 2);
+    __ cmpwi(CCR0, Rtop_frame_size, Argument::n_register_parameters);
     __ bge(CCR0, skip_native_calculate_max_stack);
-    __ li(top_frame_size, Argument::n_register_parameters);
+    __ li(Rtop_frame_size, Argument::n_register_parameters);
     __ bind(skip_native_calculate_max_stack);
     __ sldi(Rsize_of_parameters, Rsize_of_parameters, Interpreter::logStackElementSize);
-    __ sldi(top_frame_size, top_frame_size, Interpreter::logStackElementSize);
-    __ sub(parent_frame_resize, R1_SP, R15_esp); // <0, off by Interpreter::stackElementSize!
+    __ sldi(Rtop_frame_size, Rtop_frame_size, Interpreter::logStackElementSize);
+    __ sub(Rparent_frame_resize, R1_SP, R15_esp); // <0, off by Interpreter::stackElementSize!
     assert(Rsize_of_locals == noreg, "Rsize_of_locals not initialized"); // Only relevant value is Rsize_of_parameters.
   } else {
     __ lhz(Rsize_of_locals /* number of params */, in_bytes(ConstMethod::size_of_locals_offset()), Rconst_method);
     __ sldi(Rsize_of_parameters, Rsize_of_parameters, Interpreter::logStackElementSize);
     __ sldi(Rsize_of_locals, Rsize_of_locals, Interpreter::logStackElementSize);
-    __ lhz(top_frame_size, in_bytes(ConstMethod::max_stack_offset()), Rconst_method);
+    __ lhz(Rtop_frame_size, in_bytes(ConstMethod::max_stack_offset()), Rconst_method);
     __ sub(R11_scratch1, Rsize_of_locals, Rsize_of_parameters); // >=0
-    __ sub(parent_frame_resize, R1_SP, R15_esp); // <0, off by Interpreter::stackElementSize!
-    __ sldi(top_frame_size, top_frame_size, Interpreter::logStackElementSize);
-    __ add(parent_frame_resize, parent_frame_resize, R11_scratch1);
+    __ sub(Rparent_frame_resize, R1_SP, R15_esp); // <0, off by Interpreter::stackElementSize!
+    __ sldi(Rtop_frame_size, Rtop_frame_size, Interpreter::logStackElementSize);
+    __ add(Rparent_frame_resize, Rparent_frame_resize, R11_scratch1);
   }
 
   // Compute top frame size.
-  __ addi(top_frame_size, top_frame_size, frame::abi_reg_args_size + frame::ijava_state_size);
+  __ addi(Rtop_frame_size, Rtop_frame_size, frame::abi_reg_args_size + frame::ijava_state_size);
 
   // Cut back area between esp and max_stack.
-  __ addi(parent_frame_resize, parent_frame_resize, frame::abi_minframe_size - Interpreter::stackElementSize);
+  __ addi(Rparent_frame_resize, Rparent_frame_resize, frame::abi_minframe_size - Interpreter::stackElementSize);
 
-  __ round_to(top_frame_size, frame::alignment_in_bytes);
-  __ round_to(parent_frame_resize, frame::alignment_in_bytes);
-  // parent_frame_resize = (locals-parameters) - (ESP-SP-ABI48) Rounded to frame alignment size.
+  __ round_to(Rtop_frame_size, frame::alignment_in_bytes);
+  __ round_to(Rparent_frame_resize, frame::alignment_in_bytes);
+  // Rparent_frame_resize = (locals-parameters) - (ESP-SP-ABI48) Rounded to frame alignment size.
   // Enlarge by locals-parameters (not in case of native_call), shrink by ESP-SP-ABI48.
 
   if (!native_call) {
     // Stack overflow check.
     // Native calls don't need the stack size check since they have no
     // expression stack and the arguments are already on the stack and
     // we only add a handful of words to the stack.
-    __ add(R11_scratch1, parent_frame_resize, top_frame_size);
+    __ add(R11_scratch1, Rparent_frame_resize, Rtop_frame_size);
     generate_stack_overflow_check(R11_scratch1, R12_scratch2);
   }
 
   // Set up interpreter state registers.
 
   __ add(R18_locals, R15_esp, Rsize_of_parameters);
-  __ ld(R27_constPoolCache, in_bytes(ConstMethod::constants_offset()), Rconst_method);
-  __ ld(R27_constPoolCache, ConstantPool::cache_offset_in_bytes(), R27_constPoolCache);
+  __ ld(Rconst_pool, in_bytes(ConstMethod::constants_offset()), Rconst_method);
+  __ ld(R27_constPoolCache, ConstantPool::cache_offset_in_bytes(), Rconst_pool);
 
   // Set method data pointer.
   if (ProfileInterpreter) {
@@ -1012,19 +1015,21 @@ void TemplateInterpreterGenerator::generate_fixed_frame(bool native_call, Regist
 
   // Resize parent frame.
   __ mflr(R12_scratch2);
-  __ neg(parent_frame_resize, parent_frame_resize);
-  __ resize_frame(parent_frame_resize, R11_scratch1);
+  __ neg(Rparent_frame_resize, Rparent_frame_resize);
+  __ resize_frame(Rparent_frame_resize, R11_scratch1);
   __ std(R12_scratch2, _abi0(lr), R1_SP);
 
   // Get mirror and store it in the frame as GC root for this Method*.
-  __ load_mirror_from_const_method(R12_scratch2, Rconst_method);
+  __ ld(Rmirror, ConstantPool::pool_holder_offset_in_bytes(), Rconst_pool);
+  __ ld(Rmirror, in_bytes(Klass::java_mirror_offset()), Rmirror);
+  __ resolve_oop_handle(Rmirror, R11_scratch1, R12_scratch2, MacroAssembler::PRESERVATION_FRAME_LR_GP_REGS);
 
   __ addi(R26_monitor, R1_SP, -frame::ijava_state_size);
   __ addi(R15_esp, R26_monitor, -Interpreter::stackElementSize);
 
   // Store values.
   __ std(R19_method, _ijava_state_neg(method), R1_SP);
-  __ std(R12_scratch2, _ijava_state_neg(mirror), R1_SP);
+  __ std(Rmirror, _ijava_state_neg(mirror), R1_SP);
   __ std(R18_locals, _ijava_state_neg(locals), R1_SP);
   __ std(R27_constPoolCache, _ijava_state_neg(cpoolCache), R1_SP);
 
@@ -1046,12 +1051,12 @@ void TemplateInterpreterGenerator::generate_fixed_frame(bool native_call, Regist
   __ std(R0, _ijava_state_neg(oop_tmp), R1_SP); // only used for native_call
 
   // Store sender's SP and this frame's top SP.
-  __ subf(R12_scratch2, top_frame_size, R1_SP);
+  __ subf(R12_scratch2, Rtop_frame_size, R1_SP);
   __ std(R21_sender_SP, _ijava_state_neg(sender_sp), R1_SP);
   __ std(R12_scratch2, _ijava_state_neg(top_frame_sp), R1_SP);
 
   // Push top frame.
-  __ push_frame(top_frame_size, R11_scratch1);
+  __ push_frame(Rtop_frame_size, R11_scratch1);
 }
 
 // End of helpers

src/hotspot/cpu/ppc/templateTable_ppc.hpp

@@ -26,7 +26,8 @@
 #ifndef CPU_PPC_TEMPLATETABLE_PPC_HPP
 #define CPU_PPC_TEMPLATETABLE_PPC_HPP
 
-  static void prepare_invoke(int byte_no, Register Rmethod, Register Rret_addr, Register Rindex, Register Rrecv, Register Rflags, Register Rscratch);
+  static void prepare_invoke(int byte_no, Register Rmethod, Register Rret_addr, Register Rindex, Register Rrecv, Register Rflags,
+                             Register Rscratch1, Register Rscratch2);
   static void invokevfinal_helper(Register Rmethod, Register Rflags, Register Rscratch1, Register Rscratch2);
   static void generate_vtable_call(Register Rrecv_klass, Register Rindex, Register Rret, Register Rtemp);
   static void invokeinterface_object_method(Register Rrecv_klass, Register Rret, Register Rflags, Register Rindex, Register Rtemp, Register Rtemp2);