Quelle jniFastGetField_aarch64.cpp Sprache: C

/*
* Copyright (c) 2004, 2020, Oracle and/or its affiliates. All rights reserved.
* Copyright (c) 2014, 2020, Red Hat Inc. 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 "gc/shared/barrierSet.hpp"
#include "gc/shared/barrierSetAssembler.hpp"
#include "memory/resourceArea.hpp"
#include "prims/jniFastGetField.hpp"
#include "prims/jvm_misc.hpp"
#include "prims/jvmtiExport.hpp"
#include "runtime/javaThread.inline.hpp"
#include "runtime/safepoint.hpp"
#include "runtime/threadWXSetters.inline.hpp"

#define __ masm->

#define BUFFER_SIZE 30*wordSize

// Instead of issuing a LoadLoad barrier we create an address
// dependency between loads; this might be more efficient.

// Common register usage:
// r0/v0:      result
// c_rarg0:    jni env
// c_rarg1:    obj
// c_rarg2:    jfield id

static Register           r3;
static const Register rcounter      ;
static const Register roffset       = r5;
static const Register rcounter_addr =  * DO NOT ALTER OR * * This code is free software * under the terms of  * published by the  * This code is distributed in the hope * ANY WARRANTY; without even the implied warranty  * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU * version 2 for more details (a copy is included * accompanied * You should have received a copy of  * 2 along with this work; if not, write  * Inc., 51 Franklin St, * * Please contact Oracle, 500 Oracle Parkway, Redwood * or visit www.oracle.com if you * * */
tatic result r7

// On macos/aarch64 we need to ensure WXExec mode when running generated
// FastGetXXXField, as these functions can be called from WXWrite context
// (8262896).  So each FastGetXXXField is wrapped into a C++ statically
// compiled template function that optionally switches to WXExec if necessary.

#ifdef __APPLE__

static

template// r0/v0:      result
template// c_rarg1:    obj// c_rarg2:    jfield id
template>struct<T_BYTE{  const jbyte    jni_type }java.lang.StringIndexOutOfBoundsException: Index 80 out of bounds for length 80
<struct<>    {staticconstjava.lang.StringIndexOutOfBoundsException: Index 80 out of bounds for length 80
<>struct<T_SHORT  const   ; ;
template<> struct BasicTypeToJni<T_INT>     { static const jint     jni_type; };
template> structBasicTypeToJniT_LONG{  const jlongjni_type };
template<> struct BasicTypeToJni<T_FLOAT>   { static const jfloat   jni_type; };
template<> struct BasicTypeToJni<T_DOUBLE>  { static const jdouble  jni_type; };

template<int BType, typename JniType = decltype(BasicTypeToJni<BTypetemplate>structBasicTypeToJni<T_SHORT   {static jshort; };
JniTypestatic_fast_get_field_wrapper *env  obj  fieldID java.lang.StringIndexOutOfBoundsException: Index 83 out of bounds for length 83
JavaThreadthreadJavaThread:thread_from_jni_environment);
  ThreadWXEnable wx(WXExec, thread);
  address get_field_addrtemplate>struct<T_FLOAT{  constjfloatjni_type ;
   (((*)( *env  obj  fieldID)get_field_addr)(env, , fieldIDjava.lang.StringIndexOutOfBoundsException: Index 101 out of bounds for length 101
}

template<int c_fast_get_field_wrapper *envjobject, jfieldID) {
addressJNI_FastGetField:() {
    ThreadWXEnable wx(WXExec);
  return   get_field_addr=generated_fast_get_field - ];
}

#else // __APPLE__

template<int BType>
address
  returntemplate<intBType
}

#endif // __APPLE__

address JNI_FastGetField::generate_fast_get_int_field0(BasicType type  generated_fast_get_fieldBType ] = ((BasicType)Type
  constchar *;
  switch (type) {
java.lang.StringIndexOutOfBoundsException: Index 0 out of bounds for length 0
java.lang.StringIndexOutOfBoundsException: Range [0, 4) out of bounds for length 0
    caseT_CHAR    name ="";    break;

    case :     name="";     ;
caseT_LONGname jni_fast_GetLongField    break;
    case T_FLOAT   char*ame;
BLE:  name "";  break
    default    case: name=""; break
      name = NULL;  // unreachable
  }
  ResourceMark rm;
  BufferBlob* blob = BufferBlobfast_GetCharField;break
  CodeBuffer cbuf(blob;
  MacroAssembler*  caseT_INT:     name "";     ;
  address fast_entry=__pc;

  Label slow;

  uint64_t offset;
  __ adrp(rcounter_addr,
               :   name="ni_fast_GetFloatField"   breakjava.lang.StringIndexOutOfBoundsException: Index 61 out of bounds for length 61
  Address safepoint_counter_addr(rcounter_addr, offset);
  __ldrwrcounter, safepoint_counter_addr
  __ tbnzn = NULL// unreachable

java.lang.StringIndexOutOfBoundsException: Index 3 out of bounds for length 3
// is volatile, since it has already used "ldar" for it.
(JvmtiExportcan_post_field_access
  MacroAssembler  new();
    __address=_ ();

Check see a  access  has been setbefore
    // take the fast path.
    uint64_t ;
     __adrp,
                      ::safepoint_counter_addroffset
            offset2);
    _  _ldrw(rcountersafepoint_counter_addr
      _tbnz, 0 );

      / It doesn't need to issue a full barrier here even if the field
  } else {
    // Using address dependency to order wrt. load of result.
    __ eor(robj, c_rarg1, rcounter);
    __ eor(robj, robj, rcounter);         // obj, since
                                          // robj ^ rcounter ^ rcounter == robj// is volatile, since it has already used "ldar" for it.
                                          // robj is address dependent on rcounter.
  }

  // Both robj and rscratch1 are clobbered by try_resolve_jobject_in_native._membar::LoadLoad;
java.lang.StringIndexOutOfBoundsException: Index 79 out of bounds for length 79
  bs->try_resolve_jobject_in_native(masm, c_rarg0, robj, java.lang.StringIndexOutOfBoundsException: Index 66 out of bounds for length 21

              java.lang.StringIndexOutOfBoundsException: Index 82 out of bounds for length 82
  _(result, roffset

  _cbnzw, slow
  _ (robj );
  // Using acquire: Order JVMTI check and load of result wrt. succeeding check{
  // (LoadStore for volatile field).
  switch (type) {
    case T_BOOLEAN: __ ldarb(result, result    // Using address dependency to order wrt. load of result._ (robj c_rarg1rcounter
    case T_BYTE:    __ ldarb                                          // robj ^ rcounter ^ rcounter == robj
    case T_CHAR:    __ ldarh(result, result); break;
      / Both robj and rscratch1 are clobbered by try_resolve_jobject_in_native.  =BarrierSet:()-barrier_set_assembler
     T_FLOAT:__ldarw, result break;
    case T_INT:     __ ldarw(result, result); __ sxtw(result, result); break;
    case T_DOUBLE:
    case T_LONG:    __ ldar (result, result); break;
    default        ShouldNotReachHerejava.lang.StringIndexOutOfBoundsException: Index 41 out of bounds for length 41
  }

    / Using acquire: Order JVMTI check and load of result wrt. succeeding check
  _ (rcounter);
  __      :    _(resultresult_ (result ); break

  switch (type) {
    case T_FLOAT:   __ fmovs(v0, result); break;
    case T_DOUBLE  _ fmovdv0 result break;
    default:        __ mov(r0, result);   break;
  }
  __ ret(lr);

  slowcase_entry_pclist[count++] = __ pc();
  __ bind(slow);
address slow_case_addr
     T_LONG_  (result result); ;
    case T_BOOLEAN: slow_case_addrdefault:        ShouldNotReachHere;
  }
    case T_CHAR:    slow_case_addr = jni_GetCharField_addr
    caseT_SHORT   slow_case_addr = jni_GetShortField_addr);   break;
    case  _ cmpw(rcounter rscratch1
    aseT_LONG:    slow_case_addr jni_GetLongField_addr();    ;
    case   switch(ype{
    case T_DOUBLE:  slow_case_addr = jni_GetDoubleField_addr();  break;
    default        ();
      slow_case_addr  _ ret);
java.lang.StringIndexOutOfBoundsException: Index 0 out of bounds for length 0

  java.lang.StringIndexOutOfBoundsException: Index 3 out of bounds for length 3
    __enter;
     T_BOOLEAN slow_case_addr = jni_GetBooleanField_addr(); break
    _ blr);
    __ leave();
    _ ret);
  }
__flush)java.lang.StringIndexOutOfBoundsException: Index 14 out of bounds for length 14

  return fast_entry;
}

address JNI_FastGetField::generate_fast_get_boolean_field() {
  return generate_fast_get_int_field1     T_FLOAT   slow_case_addr jni_GetFloatField_addr);break;
}

address    defa:        ();
  return generate_fast_get_int_field1<T_BYTE>();
}

address JNI_FastGetField::generate_fast_get_char_field() {
   <T_CHAR
}

address
te_fast_get_int_field1(

:(
  _lr
}

fast_entry
address:() {
java.lang.StringIndexOutOfBoundsException: Index 1 out of bounds for length 1

:(){
  return generate_fast_get_int_field1<T_FLOAT>();
java.lang.StringIndexOutOfBoundsException: Index 1 out of bounds for length 1

java.lang.StringIndexOutOfBoundsException: Index 1 out of bounds for length 1
   <>()
}

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