• file
• revisions
• annotate
• diff
• comparison
• raw

src/cpu/x86/vm/jniFastGetField_x86_64.cpp@bb1da64b0492 (annotated)

src/cpu/x86/vm/jniFastGetField_x86_64.cpp

Fri, 16 Aug 2019 16:50:17 +0200

author

eosterlund

date

Fri, 16 Aug 2019 16:50:17 +0200

changeset 9834

bb1da64b0492

parent 9669

32bc598624bd

child 9703

2fdf635bcf28

permissions

-rw-r--r--

8229345: Memory leak due to vtable stubs not being shared on SPARC
Reviewed-by: mdoerr, dholmes, kvn

duke@435	1	/*
phh@9669	2	* Copyright (c) 2004, 2017, 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"
twisti@4318	26	#include "asm/macroAssembler.hpp"
stefank@2314	27	#include "memory/resourceArea.hpp"
stefank@2314	28	#include "prims/jniFastGetField.hpp"
stefank@2314	29	#include "prims/jvm_misc.hpp"
stefank@2314	30	#include "runtime/safepoint.hpp"
duke@435	31
duke@435	32	#define __ masm->
duke@435	33
duke@435	34	#define BUFFER_SIZE 30*wordSize
duke@435	35
duke@435	36	// Instead of issuing lfence for LoadLoad barrier, we create data dependency
duke@435	37	// between loads, which is more efficient than lfence.
duke@435	38
duke@435	39	// Common register usage:
duke@435	40	// rax/xmm0: result
duke@435	41	// c_rarg0: jni env
duke@435	42	// c_rarg1: obj
duke@435	43	// c_rarg2: jfield id
duke@435	44
duke@435	45	static const Register robj = r9;
duke@435	46	static const Register rcounter = r10;
duke@435	47	static const Register roffset = r11;
duke@435	48	static const Register rcounter_addr = r11;
duke@435	49
duke@435	50	// Warning: do not use rip relative addressing after the first counter load
duke@435	51	// since that may scratch r10!
duke@435	52
duke@435	53	address JNI_FastGetField::generate_fast_get_int_field0(BasicType type) {
csahu@8316	54	const char *name = NULL;
duke@435	55	switch (type) {
duke@435	56	case T_BOOLEAN: name = "jni_fast_GetBooleanField"; break;
duke@435	57	case T_BYTE: name = "jni_fast_GetByteField"; break;
duke@435	58	case T_CHAR: name = "jni_fast_GetCharField"; break;
duke@435	59	case T_SHORT: name = "jni_fast_GetShortField"; break;
duke@435	60	case T_INT: name = "jni_fast_GetIntField"; break;
duke@435	61	case T_LONG: name = "jni_fast_GetLongField"; break;
duke@435	62	default: ShouldNotReachHere();
duke@435	63	}
duke@435	64	ResourceMark rm;
twisti@2103	65	BufferBlob* blob = BufferBlob::create(name, BUFFER_SIZE);
twisti@2103	66	CodeBuffer cbuf(blob);
duke@435	67	MacroAssembler* masm = new MacroAssembler(&cbuf);
twisti@2103	68	address fast_entry = __ pc();
duke@435	69
duke@435	70	Label slow;
duke@435	71
duke@435	72	ExternalAddress counter(SafepointSynchronize::safepoint_counter_addr());
duke@435	73	__ mov32 (rcounter, counter);
never@739	74	__ mov (robj, c_rarg1);
duke@435	75	__ testb (rcounter, 1);
duke@435	76	__ jcc (Assembler::notZero, slow);
duke@435	77	if (os::is_MP()) {
never@739	78	__ xorptr(robj, rcounter);
phh@9669	79	__ xorptr(robj, rcounter); // obj, since
duke@435	80	// robj ^ rcounter ^ rcounter == robj
duke@435	81	// robj is data dependent on rcounter.
duke@435	82	}
phh@9669	83
phh@9669	84	__ clear_jweak_tag(robj);
phh@9669	85
phh@9669	86	__ movptr(robj, Address(robj, 0)); // *obj
never@739	87	__ mov (roffset, c_rarg2);
phh@9669	88	__ shrptr(roffset, 2); // offset
duke@435	89
duke@435	90	assert(count < LIST_CAPACITY, "LIST_CAPACITY too small");
duke@435	91	speculative_load_pclist[count] = __ pc();
duke@435	92	switch (type) {
duke@435	93	case T_BOOLEAN: __ movzbl (rax, Address(robj, roffset, Address::times_1)); break;
duke@435	94	case T_BYTE: __ movsbl (rax, Address(robj, roffset, Address::times_1)); break;
duke@435	95	case T_CHAR: __ movzwl (rax, Address(robj, roffset, Address::times_1)); break;
duke@435	96	case T_SHORT: __ movswl (rax, Address(robj, roffset, Address::times_1)); break;
duke@435	97	case T_INT: __ movl (rax, Address(robj, roffset, Address::times_1)); break;
duke@435	98	case T_LONG: __ movq (rax, Address(robj, roffset, Address::times_1)); break;
duke@435	99	default: ShouldNotReachHere();
duke@435	100	}
duke@435	101
duke@435	102	if (os::is_MP()) {
duke@435	103	__ lea(rcounter_addr, counter);
duke@435	104	// ca is data dependent on rax.
never@739	105	__ xorptr(rcounter_addr, rax);
never@739	106	__ xorptr(rcounter_addr, rax);
duke@435	107	__ cmpl (rcounter, Address(rcounter_addr, 0));
duke@435	108	} else {
duke@435	109	__ cmp32 (rcounter, counter);
duke@435	110	}
duke@435	111	__ jcc (Assembler::notEqual, slow);
duke@435	112
duke@435	113	__ ret (0);
duke@435	114
duke@435	115	slowcase_entry_pclist[count++] = __ pc();
duke@435	116	__ bind (slow);
csahu@8316	117	address slow_case_addr = NULL;
duke@435	118	switch (type) {
duke@435	119	case T_BOOLEAN: slow_case_addr = jni_GetBooleanField_addr(); break;
duke@435	120	case T_BYTE: slow_case_addr = jni_GetByteField_addr(); break;
duke@435	121	case T_CHAR: slow_case_addr = jni_GetCharField_addr(); break;
duke@435	122	case T_SHORT: slow_case_addr = jni_GetShortField_addr(); break;
duke@435	123	case T_INT: slow_case_addr = jni_GetIntField_addr(); break;
duke@435	124	case T_LONG: slow_case_addr = jni_GetLongField_addr();
duke@435	125	}
duke@435	126	// tail call
duke@435	127	__ jump (ExternalAddress(slow_case_addr));
duke@435	128
duke@435	129	__ flush ();
duke@435	130
duke@435	131	return fast_entry;
duke@435	132	}
duke@435	133
duke@435	134	address JNI_FastGetField::generate_fast_get_boolean_field() {
duke@435	135	return generate_fast_get_int_field0(T_BOOLEAN);
duke@435	136	}
duke@435	137
duke@435	138	address JNI_FastGetField::generate_fast_get_byte_field() {
duke@435	139	return generate_fast_get_int_field0(T_BYTE);
duke@435	140	}
duke@435	141
duke@435	142	address JNI_FastGetField::generate_fast_get_char_field() {
duke@435	143	return generate_fast_get_int_field0(T_CHAR);
duke@435	144	}
duke@435	145
duke@435	146	address JNI_FastGetField::generate_fast_get_short_field() {
duke@435	147	return generate_fast_get_int_field0(T_SHORT);
duke@435	148	}
duke@435	149
duke@435	150	address JNI_FastGetField::generate_fast_get_int_field() {
duke@435	151	return generate_fast_get_int_field0(T_INT);
duke@435	152	}
duke@435	153
duke@435	154	address JNI_FastGetField::generate_fast_get_long_field() {
duke@435	155	return generate_fast_get_int_field0(T_LONG);
duke@435	156	}
duke@435	157
duke@435	158	address JNI_FastGetField::generate_fast_get_float_field0(BasicType type) {
csahu@8316	159	const char *name = NULL;
duke@435	160	switch (type) {
duke@435	161	case T_FLOAT: name = "jni_fast_GetFloatField"; break;
duke@435	162	case T_DOUBLE: name = "jni_fast_GetDoubleField"; break;
duke@435	163	default: ShouldNotReachHere();
duke@435	164	}
duke@435	165	ResourceMark rm;
twisti@2103	166	BufferBlob* blob = BufferBlob::create(name, BUFFER_SIZE);
twisti@2103	167	CodeBuffer cbuf(blob);
duke@435	168	MacroAssembler* masm = new MacroAssembler(&cbuf);
twisti@2103	169	address fast_entry = __ pc();
duke@435	170
duke@435	171	Label slow;
duke@435	172
duke@435	173	ExternalAddress counter(SafepointSynchronize::safepoint_counter_addr());
duke@435	174	__ mov32 (rcounter, counter);
never@739	175	__ mov (robj, c_rarg1);
duke@435	176	__ testb (rcounter, 1);
duke@435	177	__ jcc (Assembler::notZero, slow);
duke@435	178	if (os::is_MP()) {
never@739	179	__ xorptr(robj, rcounter);
phh@9669	180	__ xorptr(robj, rcounter); // obj, since
duke@435	181	// robj ^ rcounter ^ rcounter == robj
duke@435	182	// robj is data dependent on rcounter.
duke@435	183	}
phh@9669	184
phh@9669	185	__ clear_jweak_tag(robj);
phh@9669	186
phh@9669	187	__ movptr(robj, Address(robj, 0)); // *obj
never@739	188	__ mov (roffset, c_rarg2);
phh@9669	189	__ shrptr(roffset, 2); // offset
duke@435	190
duke@435	191	assert(count < LIST_CAPACITY, "LIST_CAPACITY too small");
duke@435	192	speculative_load_pclist[count] = __ pc();
duke@435	193	switch (type) {
duke@435	194	case T_FLOAT: __ movflt (xmm0, Address(robj, roffset, Address::times_1)); break;
duke@435	195	case T_DOUBLE: __ movdbl (xmm0, Address(robj, roffset, Address::times_1)); break;
duke@435	196	default: ShouldNotReachHere();
duke@435	197	}
duke@435	198
duke@435	199	if (os::is_MP()) {
duke@435	200	__ lea(rcounter_addr, counter);
duke@435	201	__ movdq (rax, xmm0);
duke@435	202	// counter address is data dependent on xmm0.
never@739	203	__ xorptr(rcounter_addr, rax);
never@739	204	__ xorptr(rcounter_addr, rax);
duke@435	205	__ cmpl (rcounter, Address(rcounter_addr, 0));
duke@435	206	} else {
duke@435	207	__ cmp32 (rcounter, counter);
duke@435	208	}
duke@435	209	__ jcc (Assembler::notEqual, slow);
duke@435	210
duke@435	211	__ ret (0);
duke@435	212
duke@435	213	slowcase_entry_pclist[count++] = __ pc();
duke@435	214	__ bind (slow);
csahu@8316	215	address slow_case_addr = NULL;
duke@435	216	switch (type) {
duke@435	217	case T_FLOAT: slow_case_addr = jni_GetFloatField_addr(); break;
duke@435	218	case T_DOUBLE: slow_case_addr = jni_GetDoubleField_addr();
duke@435	219	}
duke@435	220	// tail call
duke@435	221	__ jump (ExternalAddress(slow_case_addr));
duke@435	222
duke@435	223	__ flush ();
duke@435	224
duke@435	225	return fast_entry;
duke@435	226	}
duke@435	227
duke@435	228	address JNI_FastGetField::generate_fast_get_float_field() {
duke@435	229	return generate_fast_get_float_field0(T_FLOAT);
duke@435	230	}
duke@435	231
duke@435	232	address JNI_FastGetField::generate_fast_get_double_field() {
duke@435	233	return generate_fast_get_float_field0(T_DOUBLE);
duke@435	234	}