jdk8-mips64-public/hotspot: src/cpu/mips/vm/jniFastGetField_mips

src/cpu/mips/vm/jniFastGetField_mips_64.cpp@0b27fc8adf1b (annotated)

src/cpu/mips/vm/jniFastGetField_mips_64.cpp

Fri, 27 Sep 2019 11:31:13 +0800

author: huangjia
date: Fri, 27 Sep 2019 11:31:13 +0800
changeset 9705: 0b27fc8adf1b
parent 8863: 5376ce0dc552
child 9932: 86ea9a02a717
permissions: -rw-r--r--

#10071 MIPS Port of 8176100: [REDO][REDO] G1 Needs pre barrier on dereference of weak JNI handles
Summary: runtime/jni/CallWithJNIWeak/test.sh runtime/jni/ReturnJNIWeak/test.sh crash
Reviewed-by: aoqi

 /*
  * Copyright (c) 2004, 2010, Oracle and/or its affiliates. All rights reserved.
  * Copyright (c) 2015, 2019, Loongson Technology. 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
  * under the terms of the GNU General Public License version 2 only, as
  * published by the Free Software Foundation.
  *
  * This code is distributed in the hope that it will be useful, but WITHOUT
  * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
  * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
  * version 2 for more details (a copy is included in the LICENSE file that
  * accompanied this code).
  *
  * You should have received a copy of the GNU General Public License version
  * 2 along with this work; if not, write to the Free Software Foundation,
  * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
  *
  * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
  * or visit www.oracle.com if you need additional information or have any
  * questions.
  *
  */
 #include "precompiled.hpp"
 #include "asm/macroAssembler.hpp"
 #include "memory/resourceArea.hpp"
 #include "prims/jniFastGetField.hpp"
 #include "prims/jvm_misc.hpp"
 #include "runtime/safepoint.hpp"
 #define __ masm->
 #define BUFFER_SIZE 30*wordSize
 // Instead of issuing lfence for LoadLoad barrier, we create data dependency
 // between loads, which is more efficient than lfence.
 address JNI_FastGetField::generate_fast_get_int_field0(BasicType type) {
   const char *name = NULL;
   switch (type) {
     case T_BOOLEAN: name = "jni_fast_GetBooleanField"; break;
     case T_BYTE:    name = "jni_fast_GetByteField";    break;
     case T_CHAR:    name = "jni_fast_GetCharField";    break;
     case T_SHORT:   name = "jni_fast_GetShortField";   break;
     case T_INT:     name = "jni_fast_GetIntField";     break;
     case T_LONG:    name = "jni_fast_GetLongField";    break;
     default:        ShouldNotReachHere();
   }
   ResourceMark rm;
   BufferBlob* blob = BufferBlob::create(name, BUFFER_SIZE);
   CodeBuffer cbuf(blob);
   MacroAssembler* masm = new MacroAssembler(&cbuf);
   address fast_entry = __ pc();
   Label slow;
   //  return pc        RA
   //  jni env          A0
   //  obj              A1
   //  jfieldID         A2
   address counter_addr = SafepointSynchronize::safepoint_counter_addr();
   __ set64(AT, (long)counter_addr);
   __ lw(T1, AT, 0);
   // Parameters(A0~A3) should not be modified, since they will be used in slow path
   __ andi(AT, T1, 1);
   __ bne(AT, R0, slow);
   __ delayed()->nop();
   __ move(T0, A1);
   __ clear_jweak_tag(T0);
   __ ld(T0, T0, 0);              // unbox, *obj
   __ move(T2, A2);
   __ shr(T2, 2);                 // offset
   __ dadd(T0, T0, T2);
   assert(count < LIST_CAPACITY, "LIST_CAPACITY too small");
   speculative_load_pclist[count] = __ pc();
   switch (type) {
     case T_BOOLEAN: __ lbu (V0, T0, 0); break;
     case T_BYTE:    __ lb  (V0, T0, 0); break;
     case T_CHAR:    __ lhu (V0, T0, 0); break;
     case T_SHORT:   __ lh  (V0, T0, 0); break;
     case T_INT:     __ lw  (V0, T0, 0); break;
     case T_LONG:    __ ld  (V0, T0, 0); break;
     default:        ShouldNotReachHere();
   }
   __ set64(AT, (long)counter_addr);
   __ lw(AT, AT, 0);
   __ bne(T1, AT, slow);
   __ delayed()->nop();
   __ jr(RA);
   __ delayed()->nop();
   slowcase_entry_pclist[count++] = __ pc();
   __ bind (slow);
   address slow_case_addr = NULL;
   switch (type) {
     case T_BOOLEAN: slow_case_addr = jni_GetBooleanField_addr(); break;
     case T_BYTE:    slow_case_addr = jni_GetByteField_addr();    break;
     case T_CHAR:    slow_case_addr = jni_GetCharField_addr();    break;
     case T_SHORT:   slow_case_addr = jni_GetShortField_addr();   break;
     case T_INT:     slow_case_addr = jni_GetIntField_addr();     break;
     case T_LONG:    slow_case_addr = jni_GetLongField_addr();
   }
   __ jmp(slow_case_addr);
   __ delayed()->nop();
   __ flush ();
   return fast_entry;
 }
 address JNI_FastGetField::generate_fast_get_boolean_field() {
   return generate_fast_get_int_field0(T_BOOLEAN);
 }
 address JNI_FastGetField::generate_fast_get_byte_field() {
   return generate_fast_get_int_field0(T_BYTE);
 }
 address JNI_FastGetField::generate_fast_get_char_field() {
   return generate_fast_get_int_field0(T_CHAR);
 }
 address JNI_FastGetField::generate_fast_get_short_field() {
   return generate_fast_get_int_field0(T_SHORT);
 }
 address JNI_FastGetField::generate_fast_get_int_field() {
   return generate_fast_get_int_field0(T_INT);
 }
 address JNI_FastGetField::generate_fast_get_long_field() {
   return generate_fast_get_int_field0(T_LONG);
 }
 address JNI_FastGetField::generate_fast_get_float_field0(BasicType type) {
   const char *name =NULL;
   switch (type) {
     case T_FLOAT:     name = "jni_fast_GetFloatField";     break;
     case T_DOUBLE:    name = "jni_fast_GetDoubleField";    break;
     default:          ShouldNotReachHere();
   }
   ResourceMark rm;
   BufferBlob* blob = BufferBlob::create(name, BUFFER_SIZE);
   CodeBuffer cbuf(blob);
   MacroAssembler* masm = new MacroAssembler(&cbuf);
   address fast_entry = __ pc();
   Label slow;
   //  return pc        RA
   //  jni env          A0
   //  obj              A1
   //  jfieldID         A2
   address counter_addr = SafepointSynchronize::safepoint_counter_addr();
 #ifdef _LP64
   __ set64(AT, (intptr_t)counter_addr);
   __ lw(T1, AT, 0);
 #else
   __ lui(AT, Assembler::split_high((intptr_t)counter_addr));
   __ lw(T1, AT, Assembler::split_low((intptr_t)counter_addr));
 #endif
   __ andi(AT, T1, 1);
   __ bne(AT, R0, slow);
   __ delayed()->nop();
   __ clear_jweak_tag(A1);
 #ifdef _LP64
   __ ld(A1, A1, 0);              // unbox, *obj
 #else
   __ lw(A1, A1, 0);              // unbox, *obj
 #endif
   __ shr(A2, 2);                  // offset
   __ add(A1, A1, A2);
   assert(count < LIST_CAPACITY, "LIST_CAPACITY too small");
   speculative_load_pclist[count] = __ pc();
   switch (type) {
     case T_FLOAT:
       __ lwc1(F0, A1, 0);
       break;
     case T_DOUBLE:
 #ifdef _LP64
       __ ldc1(F0, A1, 0);
 #else
       __ lwc1(F0, A1, 0);
       __ lwc1(F1, A1, 4);
 #endif
       break;
     default:       ShouldNotReachHere();
   }
 #ifdef _LP64
   __ set64(AT, (intptr_t)counter_addr);
   __ lw(AT, AT, 0);
 #else
   __ lui(AT, Assembler::split_high((intptr_t)counter_addr));
   __ lw(AT, AT, Assembler::split_low((intptr_t)counter_addr));
 #endif
   __ bne(T1, AT, slow);
   __ delayed()->nop();
   __ jr(RA);
   __ delayed()->nop();
   slowcase_entry_pclist[count++] = __ pc();
   __ bind (slow);
   address slow_case_addr = NULL;
   switch (type) {
     case T_FLOAT:  slow_case_addr = jni_GetFloatField_addr();  break;
     case T_DOUBLE: slow_case_addr = jni_GetDoubleField_addr(); break;
     default:       ShouldNotReachHere();
   }
   __ jmp(slow_case_addr);
   __ delayed()->nop();
   __ flush ();
   return fast_entry;
 }
 address JNI_FastGetField::generate_fast_get_float_field() {
   return generate_fast_get_float_field0(T_FLOAT);
 }
 address JNI_FastGetField::generate_fast_get_double_field() {
   return generate_fast_get_float_field0(T_DOUBLE);
 }

Mercurial > jdk8-mips64-public > hotspot / annotate

src/cpu/mips/vm/jniFastGetField_mips_64.cpp@0b27fc8adf1b (annotated)

src/cpu/mips/vm/jniFastGetField_mips_64.cpp