jdk8-mips64-public/hotspot: src/cpu/ppc/vm/icBuffer

8029015: PPC64 (part 216): opto: trap based null and range checks
Summary: On PPC64 use tdi instruction that does a compare and raises SIGTRAP for NULL and range checks.
Reviewed-by: kvn

     1 /*

     2  * Copyright (c) 2000, 2013, Oracle and/or its affiliates. All rights reserved.

     3  * Copyright 2012, 2013 SAP AG. All rights reserved.

     4  * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.

     5  *

     6  * This code is free software; you can redistribute it and/or modify it

     7  * under the terms of the GNU General Public License version 2 only, as

     8  * published by the Free Software Foundation.

     9  *

    10  * This code is distributed in the hope that it will be useful, but WITHOUT

    11  * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or

    12  * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License

    13  * version 2 for more details (a copy is included in the LICENSE file that

    14  * accompanied this code).

    15  *

    16  * You should have received a copy of the GNU General Public License version

    17  * 2 along with this work; if not, write to the Free Software Foundation,

    18  * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.

    19  *

    20  * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA

    21  * or visit www.oracle.com if you need additional information or have any

    22  * questions.

    23  *

    24  */

    26 #include "precompiled.hpp"

    27 #include "asm/assembler.hpp"

    28 #include "assembler_ppc.inline.hpp"

    29 #include "code/icBuffer.hpp"

    30 #include "gc_interface/collectedHeap.inline.hpp"

    31 #include "interpreter/bytecodes.hpp"

    32 #include "memory/resourceArea.hpp"

    33 #include "nativeInst_ppc.hpp"

    34 #include "oops/oop.inline.hpp"

    35 #include "oops/oop.inline2.hpp"

    37 #define __ masm.

    39 int InlineCacheBuffer::ic_stub_code_size() {

    40   return MacroAssembler::load_const_size + MacroAssembler::b64_patchable_size;

    41 }

    43 void InlineCacheBuffer::assemble_ic_buffer_code(address code_begin, void* cached_value, address entry_point) {

    44   ResourceMark rm;

    45   CodeBuffer code(code_begin, ic_stub_code_size());

    46   MacroAssembler masm(&code);

    47   // Note: even though the code contains an embedded metadata, we do not need reloc info

    48   // because

    49   // (1) the metadata is old (i.e., doesn't matter for scavenges)

    50   // (2) these ICStubs are removed *before* a GC happens, so the roots disappear.

    52   // Load the oop ...

    53   __ load_const(R19_method, (address) cached_value, R0);

    54   // ... and jump to entry point.

    55   __ b64_patchable((address) entry_point, relocInfo::none);

    57   __ flush();

    58 }

    60 address InlineCacheBuffer::ic_buffer_entry_point(address code_begin) {

    61   NativeMovConstReg* move = nativeMovConstReg_at(code_begin);   // creation also verifies the object

    62   NativeJump*        jump = nativeJump_at(move->next_instruction_address());

    63   return jump->jump_destination();

    64 }

    66 void* InlineCacheBuffer::ic_buffer_cached_value(address code_begin) {

    67   NativeMovConstReg* move = nativeMovConstReg_at(code_begin);   // creation also verifies the object

    68   void* o = (void*)move->data();

    69   return o;

    70 }

src/cpu/ppc/vm/icBuffer_ppc.cpp@41b780b43b74

src/cpu/ppc/vm/icBuffer_ppc.cpp

Mercurial > jdk8-mips64-public > hotspot / file revision

src/cpu/ppc/vm/icBuffer_ppc.cpp@41b780b43b74

src/cpu/ppc/vm/icBuffer_ppc.cpp