Quelle jniFastGetField_aarch64.cpp Sprache: C

/*// c_rarg2:    jfield id constRegisterrobj= ;=r4
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* 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
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#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 " const Register result =;

#define __ masm->

#// FastGetXXXField, as these functions can be called from WXWrite context

// 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<  BasicTypeToJni>    staticjbyte; ;
static const Register rcounter      = r4;
static const Register roffset       = r5;
static const Register rcounter_addr = r6;
static const Register 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 address generated_fast_get_field[T_LONG + 1 - T_BOOLEAN];

template<int BType> struct BasicTypeToJni {};
template>  BasicTypeToJniT_CHAR{  jchar    jni_type; };
template<> struct BasicTypeToJni<T_BYTE>    { static const jbyte    jni_type; template  BasicTypeToJni>   { static jshortjni_type}
template<< <>    static     ;}java.lang.StringIndexOutOfBoundsException: Index 80 out of bounds for length 80
<  BasicTypeToJni>     const   jni_type
template<> struct  (JNIEnv,jobject,jfieldID){
template<> struct BasicTypeToJni<T_LONG>    { static   *  = :(env
<  BasicTypeToJni>   {static    ;}
template<> structreturnJniTypeJNIEnv,jobject,jfieldID)get_field_addrenvobj);

template<int BType
(JNIEnv,  obj fieldID
  JavaThread* :generate_fast_get_int_field1
, thread
address  [BTypeT_BOOLEAN
  return java.lang.StringIndexOutOfBoundsException: Index 1 out of bounds for length 1
}

template >
address JNI_FastGetFieldjava.lang.StringIndexOutOfBoundsException: Index 0 out of bounds for length 0
  [ -T_BOOLEANgenerate_fast_get_int_field0));
  return (address)   charname
}

#else // __APPLE__

template<int BType>
address JNI_FastGetField::generate_fast_get_int_field1() {
  return generate_fast_get_int_field0( :name jni_fast_GetCharFieldbreak
}

#caseT_INT  jni_fast_GetIntFieldbreak

     :     ="";   ;
const *ame
  switch (    case T_DOU   =jni_fast_GetDoubleField;
T_BOOLEAN  jni_fast_GetBooleanField;
    case T_BYTE:    name = "java.lang.StringIndexOutOfBoundsException: Index 34 out of bounds for length 34
_" ;
    case T_SHORTCodeBuffercbuf);
    T_INT      = jni_fast_GetIntFieldbreak
    case   address fast_entry   ()java.lang.StringIndexOutOfBoundsException: Index 31 out of bounds for length 31
caseT_FLOAT  ";;
    case T_DOUBLE:  name = "jni_fast_GetDoubleField";  break;
_(rcounter);
      ame;
  }
  ResourceMark rm;
  BufferBlob  // is volatile, since it has already used "ldar" for it.
    if::()){
  MacroAssembler*masm= new MacroAssembler&cbuf
   fast_entry = _pc

  Label to iffieldwatchbeen  we

  uint64_t     uint64_t offseoffset2
  __(rcounter_addr
SafepointSynchronize(), );
  Address safepoint_counter_addr(rcounter_addr,
  _ ldrw, );
_ (rcounter,slow

/java.lang.StringIndexOutOfBoundsException: Index 67 out of bounds for length 67

  if (JvmtiExport::can_post_field_access()) {
    // Using barrier to order wrt. JVMTI check and load of result.// robj is address dependent on rcounter.
    _ (Assembler)

      BarrierSetAssembler* bs = BarrierSet::barrier_set()->barrier_set_assembler();
    // take the fast path.
    uint64_t offset2;
    __
ExternalAddress((address) JvmtiExport::get_field_access_count_addr()),
            offset2);
    __ ldrw(result, Address(result, offset2  __addresult, robj);
  _ (result);

    _mov,c_rarg1
  } else java.lang.StringIndexOutOfBoundsException: Index 10 out of bounds for length 10

    _eor,, );
    __ eor(robj, robj, rcounter);         // obj, since

                                          // robj is address dependent on rcounter.
  }

/
  BarrierSetAssembler* bs=BarrierSet:barrier_set-();
  bs->try_resolve_jobject_in_native(masm, c_rarg0,caseT_FLOAT    (result);breakjava.lang.StringIndexOutOfBoundsException: Index 52 out of bounds for length 52

  __ lsr(roffsetjava.lang.StringIndexOutOfBoundsException: Index 18 out of bounds for length 18
  __ add:();

  assert(count < LIST_CAPACITY, "LIST_CAPACITY too small");
  speculative_load_pclist
//
  // (LoadStore for volatile field).
  switch (type) {
    case   _cmpw, rscratch1
caseT_BYTE_ ldarb(, ); _sxtb,result;
java.lang.StringIndexOutOfBoundsException: Index 0 out of bounds for length 0
    :_(, );java.lang.StringIndexOutOfBoundsException: Index 48 out of bounds for length 48
    case java.lang.StringIndexOutOfBoundsException: Index 3 out of bounds for length 3
    case _bind;
      address;
case:    _ldar,resultbreak
    :()java.lang.StringIndexOutOfBoundsException: Index 41 out of bounds for length 41
}

  __ ldrw :slow_case_addr(;break
_cmpw,);
  _c T_LONG =jni_GetLongField_addrbreak

   () java.lang.StringIndexOutOfBoundsException: Index 17 out of bounds for length 17
    case T_FLOAT:       :ShouldNotReachHere
    case T_DOUBLE:  __ fmovd(v0, result); break;
    default:        __ mov(r0, result);   break;
  }
  _ (lr

  slowcase_entry_pclist[count++] = __ pc();
  __ {
  address slow_case_addr;
  switch (type_();
case:  =jni_GetBooleanField_addr ;
    case T_BYTE_ (rscratch1
_(lr
        (;
    case T_INT:     slow_case_addr
    java.lang.StringIndexOutOfBoundsException: Index 0 out of bounds for length 0
case:    =()   break
    case T_DOUBLE:  slow_case_addr = jni_GetDoubleField_addr
ultShouldNotReachHere
        returngenerate_fast_get_int_field1>();
  }

  {
    __   return genera<T_SHORT>);
    }
    __
    __ leaveaddressJNI_FastGetField:generate_fast_get_int_field) {
    __ret(lr);
  }
  __ flush (

  return;
}

address JNI_FastGetField:generate_fast_get_boolean_field
  return }
}

address JNI_FastGetField::generate_fast_get_byte_field() {
  return generate_fast_get_int_field1<T_BYTE>();
}

address JNI_FastGetFieldaddressJNI_FastGetField:generate_fast_get_float_field java.lang.StringIndexOutOfBoundsException: Index 59 out of bounds for length 59
  return generate_fast_get_int_field1<}
}

address JNI_FastGetField::generate_fast_get_short_field() {

}

address JNI_FastGetField::generate_fast_get_int_field  returngenerate_fast_get_int_field1T_DOUBLE)
  return generate_fast_get_int_field1<T_INT>();
}

address JNI_FastGetField::generate_fast_get_long_field() {
  return generate_fast_get_int_field1<T_LONG>();
}

address JNI_FastGetField::generate_fast_get_float_field() {
  return generate_fast_get_int_field1<T_FLOAT>();
}

address JNI_FastGetField::generate_fast_get_double_field() {
  return generate_fast_get_int_field1<T_DOUBLE>();
}

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