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src/cpu/x86/vm/icBuffer_x86.cpp@45a1bf98f1bb (annotated)

src/cpu/x86/vm/icBuffer_x86.cpp

Mon, 13 Feb 2012 02:29:22 -0800

author

twisti

date

Mon, 13 Feb 2012 02:29:22 -0800

changeset 3566

45a1bf98f1bb

parent 2314

f95d63e2154a

child 4037

da91efe96a93

permissions

-rw-r--r--

7141329: Strange values of stack_size in -XX:+TraceMethodHandles output
Reviewed-by: kvn, never

duke@435	1	/*
stefank@2314	2	* Copyright (c) 1997, 2010, Oracle and/or its affiliates. All rights reserved.
duke@435	3	* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
duke@435	4	*
duke@435	5	* This code is free software; you can redistribute it and/or modify it
duke@435	6	* under the terms of the GNU General Public License version 2 only, as
duke@435	7	* published by the Free Software Foundation.
duke@435	8	*
duke@435	9	* This code is distributed in the hope that it will be useful, but WITHOUT
duke@435	10	* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
duke@435	11	* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
duke@435	12	* version 2 for more details (a copy is included in the LICENSE file that
duke@435	13	* accompanied this code).
duke@435	14	*
duke@435	15	* You should have received a copy of the GNU General Public License version
duke@435	16	* 2 along with this work; if not, write to the Free Software Foundation,
duke@435	17	* Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
duke@435	18	*
trims@1907	19	* Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
trims@1907	20	* or visit www.oracle.com if you need additional information or have any
trims@1907	21	* questions.
duke@435	22	*
duke@435	23	*/
duke@435	24
stefank@2314	25	#include "precompiled.hpp"
stefank@2314	26	#include "asm/assembler.hpp"
stefank@2314	27	#include "assembler_x86.inline.hpp"
stefank@2314	28	#include "code/icBuffer.hpp"
stefank@2314	29	#include "gc_interface/collectedHeap.inline.hpp"
stefank@2314	30	#include "interpreter/bytecodes.hpp"
stefank@2314	31	#include "memory/resourceArea.hpp"
stefank@2314	32	#include "nativeInst_x86.hpp"
stefank@2314	33	#include "oops/oop.inline.hpp"
stefank@2314	34	#include "oops/oop.inline2.hpp"
duke@435	35
duke@435	36	int InlineCacheBuffer::ic_stub_code_size() {
duke@435	37	return NativeMovConstReg::instruction_size +
duke@435	38	NativeJump::instruction_size +
duke@435	39	1;
duke@435	40	// so that code_end can be set in CodeBuffer
duke@435	41	// 64bit 16 = 5 + 10 bytes + 1 byte
duke@435	42	// 32bit 11 = 10 bytes + 1 byte
duke@435	43	}
duke@435	44
duke@435	45
duke@435	46
duke@435	47	void InlineCacheBuffer::assemble_ic_buffer_code(address code_begin, oop cached_oop, address entry_point) {
duke@435	48	ResourceMark rm;
duke@435	49	CodeBuffer code(code_begin, ic_stub_code_size());
duke@435	50	MacroAssembler* masm = new MacroAssembler(&code);
duke@435	51	// note: even though the code contains an embedded oop, we do not need reloc info
duke@435	52	// because
duke@435	53	// (1) the oop is old (i.e., doesn't matter for scavenges)
duke@435	54	// (2) these ICStubs are removed *before* a GC happens, so the roots disappear
duke@435	55	assert(cached_oop == NULL || cached_oop->is_perm(), "must be perm oop");
duke@435	56	masm->lea(rax, OopAddress((address) cached_oop));
duke@435	57	masm->jump(ExternalAddress(entry_point));
duke@435	58	}
duke@435	59
duke@435	60
duke@435	61	address InlineCacheBuffer::ic_buffer_entry_point(address code_begin) {
duke@435	62	NativeMovConstReg* move = nativeMovConstReg_at(code_begin); // creation also verifies the object
duke@435	63	NativeJump* jump = nativeJump_at(move->next_instruction_address());
duke@435	64	return jump->jump_destination();
duke@435	65	}
duke@435	66
duke@435	67
duke@435	68	oop InlineCacheBuffer::ic_buffer_cached_oop(address code_begin) {
duke@435	69	// creation also verifies the object
duke@435	70	NativeMovConstReg* move = nativeMovConstReg_at(code_begin);
duke@435	71	// Verifies the jump
duke@435	72	NativeJump* jump = nativeJump_at(move->next_instruction_address());
duke@435	73	return (oop)move->data();
duke@435	74	}