author | rkennke |
Mon, 15 Jul 2019 15:27:06 +0200 | |
changeset 55679 | aa96c53c592b |
parent 55574 | 0246f81c1dcd |
child 55718 | 9fbc32392798 |
permissions | -rw-r--r-- |
52925
9c18c9d839d3
8214259: Implementation: JEP 189: Shenandoah: A Low-Pause-Time Garbage Collector (Experimental)
rkennke
parents:
diff
changeset
|
1 |
/* |
54763
2584e5772546
8222926: Shenandoah build fails with --with-jvm-features=-compiler1
aoqi
parents:
54425
diff
changeset
|
2 |
* Copyright (c) 2018, 2019, Red Hat, Inc. All rights reserved. |
52925
9c18c9d839d3
8214259: Implementation: JEP 189: Shenandoah: A Low-Pause-Time Garbage Collector (Experimental)
rkennke
parents:
diff
changeset
|
3 |
* |
9c18c9d839d3
8214259: Implementation: JEP 189: Shenandoah: A Low-Pause-Time Garbage Collector (Experimental)
rkennke
parents:
diff
changeset
|
4 |
* This code is free software; you can redistribute it and/or modify it |
9c18c9d839d3
8214259: Implementation: JEP 189: Shenandoah: A Low-Pause-Time Garbage Collector (Experimental)
rkennke
parents:
diff
changeset
|
5 |
* under the terms of the GNU General Public License version 2 only, as |
9c18c9d839d3
8214259: Implementation: JEP 189: Shenandoah: A Low-Pause-Time Garbage Collector (Experimental)
rkennke
parents:
diff
changeset
|
6 |
* published by the Free Software Foundation. |
9c18c9d839d3
8214259: Implementation: JEP 189: Shenandoah: A Low-Pause-Time Garbage Collector (Experimental)
rkennke
parents:
diff
changeset
|
7 |
* |
9c18c9d839d3
8214259: Implementation: JEP 189: Shenandoah: A Low-Pause-Time Garbage Collector (Experimental)
rkennke
parents:
diff
changeset
|
8 |
* This code is distributed in the hope that it will be useful, but WITHOUT |
9c18c9d839d3
8214259: Implementation: JEP 189: Shenandoah: A Low-Pause-Time Garbage Collector (Experimental)
rkennke
parents:
diff
changeset
|
9 |
* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or |
9c18c9d839d3
8214259: Implementation: JEP 189: Shenandoah: A Low-Pause-Time Garbage Collector (Experimental)
rkennke
parents:
diff
changeset
|
10 |
* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License |
9c18c9d839d3
8214259: Implementation: JEP 189: Shenandoah: A Low-Pause-Time Garbage Collector (Experimental)
rkennke
parents:
diff
changeset
|
11 |
* version 2 for more details (a copy is included in the LICENSE file that |
9c18c9d839d3
8214259: Implementation: JEP 189: Shenandoah: A Low-Pause-Time Garbage Collector (Experimental)
rkennke
parents:
diff
changeset
|
12 |
* accompanied this code). |
9c18c9d839d3
8214259: Implementation: JEP 189: Shenandoah: A Low-Pause-Time Garbage Collector (Experimental)
rkennke
parents:
diff
changeset
|
13 |
* |
9c18c9d839d3
8214259: Implementation: JEP 189: Shenandoah: A Low-Pause-Time Garbage Collector (Experimental)
rkennke
parents:
diff
changeset
|
14 |
* You should have received a copy of the GNU General Public License version |
9c18c9d839d3
8214259: Implementation: JEP 189: Shenandoah: A Low-Pause-Time Garbage Collector (Experimental)
rkennke
parents:
diff
changeset
|
15 |
* 2 along with this work; if not, write to the Free Software Foundation, |
9c18c9d839d3
8214259: Implementation: JEP 189: Shenandoah: A Low-Pause-Time Garbage Collector (Experimental)
rkennke
parents:
diff
changeset
|
16 |
* Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. |
9c18c9d839d3
8214259: Implementation: JEP 189: Shenandoah: A Low-Pause-Time Garbage Collector (Experimental)
rkennke
parents:
diff
changeset
|
17 |
* |
9c18c9d839d3
8214259: Implementation: JEP 189: Shenandoah: A Low-Pause-Time Garbage Collector (Experimental)
rkennke
parents:
diff
changeset
|
18 |
* Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA |
9c18c9d839d3
8214259: Implementation: JEP 189: Shenandoah: A Low-Pause-Time Garbage Collector (Experimental)
rkennke
parents:
diff
changeset
|
19 |
* or visit www.oracle.com if you need additional information or have any |
9c18c9d839d3
8214259: Implementation: JEP 189: Shenandoah: A Low-Pause-Time Garbage Collector (Experimental)
rkennke
parents:
diff
changeset
|
20 |
* questions. |
9c18c9d839d3
8214259: Implementation: JEP 189: Shenandoah: A Low-Pause-Time Garbage Collector (Experimental)
rkennke
parents:
diff
changeset
|
21 |
* |
9c18c9d839d3
8214259: Implementation: JEP 189: Shenandoah: A Low-Pause-Time Garbage Collector (Experimental)
rkennke
parents:
diff
changeset
|
22 |
*/ |
9c18c9d839d3
8214259: Implementation: JEP 189: Shenandoah: A Low-Pause-Time Garbage Collector (Experimental)
rkennke
parents:
diff
changeset
|
23 |
|
9c18c9d839d3
8214259: Implementation: JEP 189: Shenandoah: A Low-Pause-Time Garbage Collector (Experimental)
rkennke
parents:
diff
changeset
|
24 |
#include "precompiled.hpp" |
9c18c9d839d3
8214259: Implementation: JEP 189: Shenandoah: A Low-Pause-Time Garbage Collector (Experimental)
rkennke
parents:
diff
changeset
|
25 |
#include "gc/shenandoah/shenandoahBarrierSetAssembler.hpp" |
54766
1321f8cf9de5
8223567: Rename ShenandoahBrooksPointer to ShenandoahForwarding
rkennke
parents:
54763
diff
changeset
|
26 |
#include "gc/shenandoah/shenandoahForwarding.hpp" |
52925
9c18c9d839d3
8214259: Implementation: JEP 189: Shenandoah: A Low-Pause-Time Garbage Collector (Experimental)
rkennke
parents:
diff
changeset
|
27 |
#include "gc/shenandoah/shenandoahHeap.hpp" |
9c18c9d839d3
8214259: Implementation: JEP 189: Shenandoah: A Low-Pause-Time Garbage Collector (Experimental)
rkennke
parents:
diff
changeset
|
28 |
#include "gc/shenandoah/shenandoahHeapRegion.hpp" |
9c18c9d839d3
8214259: Implementation: JEP 189: Shenandoah: A Low-Pause-Time Garbage Collector (Experimental)
rkennke
parents:
diff
changeset
|
29 |
#include "gc/shenandoah/shenandoahHeuristics.hpp" |
9c18c9d839d3
8214259: Implementation: JEP 189: Shenandoah: A Low-Pause-Time Garbage Collector (Experimental)
rkennke
parents:
diff
changeset
|
30 |
#include "gc/shenandoah/shenandoahRuntime.hpp" |
9c18c9d839d3
8214259: Implementation: JEP 189: Shenandoah: A Low-Pause-Time Garbage Collector (Experimental)
rkennke
parents:
diff
changeset
|
31 |
#include "gc/shenandoah/shenandoahThreadLocalData.hpp" |
9c18c9d839d3
8214259: Implementation: JEP 189: Shenandoah: A Low-Pause-Time Garbage Collector (Experimental)
rkennke
parents:
diff
changeset
|
32 |
#include "interpreter/interpreter.hpp" |
9c18c9d839d3
8214259: Implementation: JEP 189: Shenandoah: A Low-Pause-Time Garbage Collector (Experimental)
rkennke
parents:
diff
changeset
|
33 |
#include "interpreter/interp_masm.hpp" |
9c18c9d839d3
8214259: Implementation: JEP 189: Shenandoah: A Low-Pause-Time Garbage Collector (Experimental)
rkennke
parents:
diff
changeset
|
34 |
#include "runtime/sharedRuntime.hpp" |
9c18c9d839d3
8214259: Implementation: JEP 189: Shenandoah: A Low-Pause-Time Garbage Collector (Experimental)
rkennke
parents:
diff
changeset
|
35 |
#include "runtime/thread.hpp" |
9c18c9d839d3
8214259: Implementation: JEP 189: Shenandoah: A Low-Pause-Time Garbage Collector (Experimental)
rkennke
parents:
diff
changeset
|
36 |
#ifdef COMPILER1 |
9c18c9d839d3
8214259: Implementation: JEP 189: Shenandoah: A Low-Pause-Time Garbage Collector (Experimental)
rkennke
parents:
diff
changeset
|
37 |
#include "c1/c1_LIRAssembler.hpp" |
9c18c9d839d3
8214259: Implementation: JEP 189: Shenandoah: A Low-Pause-Time Garbage Collector (Experimental)
rkennke
parents:
diff
changeset
|
38 |
#include "c1/c1_MacroAssembler.hpp" |
9c18c9d839d3
8214259: Implementation: JEP 189: Shenandoah: A Low-Pause-Time Garbage Collector (Experimental)
rkennke
parents:
diff
changeset
|
39 |
#include "gc/shenandoah/c1/shenandoahBarrierSetC1.hpp" |
9c18c9d839d3
8214259: Implementation: JEP 189: Shenandoah: A Low-Pause-Time Garbage Collector (Experimental)
rkennke
parents:
diff
changeset
|
40 |
#endif |
9c18c9d839d3
8214259: Implementation: JEP 189: Shenandoah: A Low-Pause-Time Garbage Collector (Experimental)
rkennke
parents:
diff
changeset
|
41 |
|
9c18c9d839d3
8214259: Implementation: JEP 189: Shenandoah: A Low-Pause-Time Garbage Collector (Experimental)
rkennke
parents:
diff
changeset
|
42 |
#define __ masm-> |
9c18c9d839d3
8214259: Implementation: JEP 189: Shenandoah: A Low-Pause-Time Garbage Collector (Experimental)
rkennke
parents:
diff
changeset
|
43 |
|
54423 | 44 |
address ShenandoahBarrierSetAssembler::_shenandoah_lrb = NULL; |
52925
9c18c9d839d3
8214259: Implementation: JEP 189: Shenandoah: A Low-Pause-Time Garbage Collector (Experimental)
rkennke
parents:
diff
changeset
|
45 |
|
9c18c9d839d3
8214259: Implementation: JEP 189: Shenandoah: A Low-Pause-Time Garbage Collector (Experimental)
rkennke
parents:
diff
changeset
|
46 |
void ShenandoahBarrierSetAssembler::arraycopy_prologue(MacroAssembler* masm, DecoratorSet decorators, bool is_oop, |
54979
f982c1a6582c
8224187: Refactor arraycopy_prologue to allow ZGC read barriers on arraycopy
smonteith
parents:
54766
diff
changeset
|
47 |
Register src, Register dst, Register count, RegSet saved_regs) { |
52925
9c18c9d839d3
8214259: Implementation: JEP 189: Shenandoah: A Low-Pause-Time Garbage Collector (Experimental)
rkennke
parents:
diff
changeset
|
48 |
if (is_oop) { |
9c18c9d839d3
8214259: Implementation: JEP 189: Shenandoah: A Low-Pause-Time Garbage Collector (Experimental)
rkennke
parents:
diff
changeset
|
49 |
bool dest_uninitialized = (decorators & IS_DEST_UNINITIALIZED) != 0; |
55574
0246f81c1dcd
8227199: Shenandoah: Remove superfluous calls to can_do_traversal_gc()
rkennke
parents:
55076
diff
changeset
|
50 |
if (ShenandoahSATBBarrier && !dest_uninitialized) { |
54383 | 51 |
|
52 |
Label done; |
|
53 |
||
54 |
// Avoid calling runtime if count == 0 |
|
55 |
__ cbz(count, done); |
|
56 |
||
57 |
// Is marking active? |
|
58 |
Address gc_state(rthread, in_bytes(ShenandoahThreadLocalData::gc_state_offset())); |
|
59 |
__ ldrb(rscratch1, gc_state); |
|
60 |
__ tbz(rscratch1, ShenandoahHeap::MARKING_BITPOS, done); |
|
61 |
||
52925
9c18c9d839d3
8214259: Implementation: JEP 189: Shenandoah: A Low-Pause-Time Garbage Collector (Experimental)
rkennke
parents:
diff
changeset
|
62 |
__ push(saved_regs, sp); |
9c18c9d839d3
8214259: Implementation: JEP 189: Shenandoah: A Low-Pause-Time Garbage Collector (Experimental)
rkennke
parents:
diff
changeset
|
63 |
if (count == c_rarg0) { |
54979
f982c1a6582c
8224187: Refactor arraycopy_prologue to allow ZGC read barriers on arraycopy
smonteith
parents:
54766
diff
changeset
|
64 |
if (dst == c_rarg1) { |
52925
9c18c9d839d3
8214259: Implementation: JEP 189: Shenandoah: A Low-Pause-Time Garbage Collector (Experimental)
rkennke
parents:
diff
changeset
|
65 |
// exactly backwards!! |
9c18c9d839d3
8214259: Implementation: JEP 189: Shenandoah: A Low-Pause-Time Garbage Collector (Experimental)
rkennke
parents:
diff
changeset
|
66 |
__ mov(rscratch1, c_rarg0); |
9c18c9d839d3
8214259: Implementation: JEP 189: Shenandoah: A Low-Pause-Time Garbage Collector (Experimental)
rkennke
parents:
diff
changeset
|
67 |
__ mov(c_rarg0, c_rarg1); |
9c18c9d839d3
8214259: Implementation: JEP 189: Shenandoah: A Low-Pause-Time Garbage Collector (Experimental)
rkennke
parents:
diff
changeset
|
68 |
__ mov(c_rarg1, rscratch1); |
9c18c9d839d3
8214259: Implementation: JEP 189: Shenandoah: A Low-Pause-Time Garbage Collector (Experimental)
rkennke
parents:
diff
changeset
|
69 |
} else { |
9c18c9d839d3
8214259: Implementation: JEP 189: Shenandoah: A Low-Pause-Time Garbage Collector (Experimental)
rkennke
parents:
diff
changeset
|
70 |
__ mov(c_rarg1, count); |
54979
f982c1a6582c
8224187: Refactor arraycopy_prologue to allow ZGC read barriers on arraycopy
smonteith
parents:
54766
diff
changeset
|
71 |
__ mov(c_rarg0, dst); |
52925
9c18c9d839d3
8214259: Implementation: JEP 189: Shenandoah: A Low-Pause-Time Garbage Collector (Experimental)
rkennke
parents:
diff
changeset
|
72 |
} |
9c18c9d839d3
8214259: Implementation: JEP 189: Shenandoah: A Low-Pause-Time Garbage Collector (Experimental)
rkennke
parents:
diff
changeset
|
73 |
} else { |
54979
f982c1a6582c
8224187: Refactor arraycopy_prologue to allow ZGC read barriers on arraycopy
smonteith
parents:
54766
diff
changeset
|
74 |
__ mov(c_rarg0, dst); |
52925
9c18c9d839d3
8214259: Implementation: JEP 189: Shenandoah: A Low-Pause-Time Garbage Collector (Experimental)
rkennke
parents:
diff
changeset
|
75 |
__ mov(c_rarg1, count); |
9c18c9d839d3
8214259: Implementation: JEP 189: Shenandoah: A Low-Pause-Time Garbage Collector (Experimental)
rkennke
parents:
diff
changeset
|
76 |
} |
9c18c9d839d3
8214259: Implementation: JEP 189: Shenandoah: A Low-Pause-Time Garbage Collector (Experimental)
rkennke
parents:
diff
changeset
|
77 |
if (UseCompressedOops) { |
9c18c9d839d3
8214259: Implementation: JEP 189: Shenandoah: A Low-Pause-Time Garbage Collector (Experimental)
rkennke
parents:
diff
changeset
|
78 |
__ call_VM_leaf(CAST_FROM_FN_PTR(address, ShenandoahRuntime::write_ref_array_pre_narrow_oop_entry), 2); |
9c18c9d839d3
8214259: Implementation: JEP 189: Shenandoah: A Low-Pause-Time Garbage Collector (Experimental)
rkennke
parents:
diff
changeset
|
79 |
} else { |
9c18c9d839d3
8214259: Implementation: JEP 189: Shenandoah: A Low-Pause-Time Garbage Collector (Experimental)
rkennke
parents:
diff
changeset
|
80 |
__ call_VM_leaf(CAST_FROM_FN_PTR(address, ShenandoahRuntime::write_ref_array_pre_oop_entry), 2); |
9c18c9d839d3
8214259: Implementation: JEP 189: Shenandoah: A Low-Pause-Time Garbage Collector (Experimental)
rkennke
parents:
diff
changeset
|
81 |
} |
9c18c9d839d3
8214259: Implementation: JEP 189: Shenandoah: A Low-Pause-Time Garbage Collector (Experimental)
rkennke
parents:
diff
changeset
|
82 |
__ pop(saved_regs, sp); |
54383 | 83 |
__ bind(done); |
52925
9c18c9d839d3
8214259: Implementation: JEP 189: Shenandoah: A Low-Pause-Time Garbage Collector (Experimental)
rkennke
parents:
diff
changeset
|
84 |
} |
9c18c9d839d3
8214259: Implementation: JEP 189: Shenandoah: A Low-Pause-Time Garbage Collector (Experimental)
rkennke
parents:
diff
changeset
|
85 |
} |
9c18c9d839d3
8214259: Implementation: JEP 189: Shenandoah: A Low-Pause-Time Garbage Collector (Experimental)
rkennke
parents:
diff
changeset
|
86 |
} |
9c18c9d839d3
8214259: Implementation: JEP 189: Shenandoah: A Low-Pause-Time Garbage Collector (Experimental)
rkennke
parents:
diff
changeset
|
87 |
|
9c18c9d839d3
8214259: Implementation: JEP 189: Shenandoah: A Low-Pause-Time Garbage Collector (Experimental)
rkennke
parents:
diff
changeset
|
88 |
void ShenandoahBarrierSetAssembler::arraycopy_epilogue(MacroAssembler* masm, DecoratorSet decorators, bool is_oop, |
54266
7816d989bf21
8216989: CardTableBarrierSetAssembler::gen_write_ref_array_post_barrier() does not check for zero length on AARCH64
dpochepk
parents:
53719
diff
changeset
|
89 |
Register start, Register count, Register scratch, RegSet saved_regs) { |
52925
9c18c9d839d3
8214259: Implementation: JEP 189: Shenandoah: A Low-Pause-Time Garbage Collector (Experimental)
rkennke
parents:
diff
changeset
|
90 |
if (is_oop) { |
54425
13c02cc7a6e5
8221848: Shenandoah: ArrayCopy post-barrier improvements
rkennke
parents:
54423
diff
changeset
|
91 |
Label done; |
13c02cc7a6e5
8221848: Shenandoah: ArrayCopy post-barrier improvements
rkennke
parents:
54423
diff
changeset
|
92 |
|
13c02cc7a6e5
8221848: Shenandoah: ArrayCopy post-barrier improvements
rkennke
parents:
54423
diff
changeset
|
93 |
// Avoid calling runtime if count == 0 |
13c02cc7a6e5
8221848: Shenandoah: ArrayCopy post-barrier improvements
rkennke
parents:
54423
diff
changeset
|
94 |
__ cbz(count, done); |
13c02cc7a6e5
8221848: Shenandoah: ArrayCopy post-barrier improvements
rkennke
parents:
54423
diff
changeset
|
95 |
|
13c02cc7a6e5
8221848: Shenandoah: ArrayCopy post-barrier improvements
rkennke
parents:
54423
diff
changeset
|
96 |
// Is updating references? |
13c02cc7a6e5
8221848: Shenandoah: ArrayCopy post-barrier improvements
rkennke
parents:
54423
diff
changeset
|
97 |
Address gc_state(rthread, in_bytes(ShenandoahThreadLocalData::gc_state_offset())); |
13c02cc7a6e5
8221848: Shenandoah: ArrayCopy post-barrier improvements
rkennke
parents:
54423
diff
changeset
|
98 |
__ ldrb(rscratch1, gc_state); |
13c02cc7a6e5
8221848: Shenandoah: ArrayCopy post-barrier improvements
rkennke
parents:
54423
diff
changeset
|
99 |
__ tbz(rscratch1, ShenandoahHeap::UPDATEREFS_BITPOS, done); |
13c02cc7a6e5
8221848: Shenandoah: ArrayCopy post-barrier improvements
rkennke
parents:
54423
diff
changeset
|
100 |
|
52925
9c18c9d839d3
8214259: Implementation: JEP 189: Shenandoah: A Low-Pause-Time Garbage Collector (Experimental)
rkennke
parents:
diff
changeset
|
101 |
__ push(saved_regs, sp); |
54266
7816d989bf21
8216989: CardTableBarrierSetAssembler::gen_write_ref_array_post_barrier() does not check for zero length on AARCH64
dpochepk
parents:
53719
diff
changeset
|
102 |
assert_different_registers(start, count, scratch); |
7816d989bf21
8216989: CardTableBarrierSetAssembler::gen_write_ref_array_post_barrier() does not check for zero length on AARCH64
dpochepk
parents:
53719
diff
changeset
|
103 |
assert_different_registers(c_rarg0, count); |
52925
9c18c9d839d3
8214259: Implementation: JEP 189: Shenandoah: A Low-Pause-Time Garbage Collector (Experimental)
rkennke
parents:
diff
changeset
|
104 |
__ mov(c_rarg0, start); |
54266
7816d989bf21
8216989: CardTableBarrierSetAssembler::gen_write_ref_array_post_barrier() does not check for zero length on AARCH64
dpochepk
parents:
53719
diff
changeset
|
105 |
__ mov(c_rarg1, count); |
52925
9c18c9d839d3
8214259: Implementation: JEP 189: Shenandoah: A Low-Pause-Time Garbage Collector (Experimental)
rkennke
parents:
diff
changeset
|
106 |
__ call_VM_leaf(CAST_FROM_FN_PTR(address, ShenandoahRuntime::write_ref_array_post_entry), 2); |
9c18c9d839d3
8214259: Implementation: JEP 189: Shenandoah: A Low-Pause-Time Garbage Collector (Experimental)
rkennke
parents:
diff
changeset
|
107 |
__ pop(saved_regs, sp); |
54425
13c02cc7a6e5
8221848: Shenandoah: ArrayCopy post-barrier improvements
rkennke
parents:
54423
diff
changeset
|
108 |
|
13c02cc7a6e5
8221848: Shenandoah: ArrayCopy post-barrier improvements
rkennke
parents:
54423
diff
changeset
|
109 |
__ bind(done); |
52925
9c18c9d839d3
8214259: Implementation: JEP 189: Shenandoah: A Low-Pause-Time Garbage Collector (Experimental)
rkennke
parents:
diff
changeset
|
110 |
} |
9c18c9d839d3
8214259: Implementation: JEP 189: Shenandoah: A Low-Pause-Time Garbage Collector (Experimental)
rkennke
parents:
diff
changeset
|
111 |
} |
9c18c9d839d3
8214259: Implementation: JEP 189: Shenandoah: A Low-Pause-Time Garbage Collector (Experimental)
rkennke
parents:
diff
changeset
|
112 |
|
9c18c9d839d3
8214259: Implementation: JEP 189: Shenandoah: A Low-Pause-Time Garbage Collector (Experimental)
rkennke
parents:
diff
changeset
|
113 |
void ShenandoahBarrierSetAssembler::shenandoah_write_barrier_pre(MacroAssembler* masm, |
9c18c9d839d3
8214259: Implementation: JEP 189: Shenandoah: A Low-Pause-Time Garbage Collector (Experimental)
rkennke
parents:
diff
changeset
|
114 |
Register obj, |
9c18c9d839d3
8214259: Implementation: JEP 189: Shenandoah: A Low-Pause-Time Garbage Collector (Experimental)
rkennke
parents:
diff
changeset
|
115 |
Register pre_val, |
9c18c9d839d3
8214259: Implementation: JEP 189: Shenandoah: A Low-Pause-Time Garbage Collector (Experimental)
rkennke
parents:
diff
changeset
|
116 |
Register thread, |
9c18c9d839d3
8214259: Implementation: JEP 189: Shenandoah: A Low-Pause-Time Garbage Collector (Experimental)
rkennke
parents:
diff
changeset
|
117 |
Register tmp, |
9c18c9d839d3
8214259: Implementation: JEP 189: Shenandoah: A Low-Pause-Time Garbage Collector (Experimental)
rkennke
parents:
diff
changeset
|
118 |
bool tosca_live, |
9c18c9d839d3
8214259: Implementation: JEP 189: Shenandoah: A Low-Pause-Time Garbage Collector (Experimental)
rkennke
parents:
diff
changeset
|
119 |
bool expand_call) { |
9c18c9d839d3
8214259: Implementation: JEP 189: Shenandoah: A Low-Pause-Time Garbage Collector (Experimental)
rkennke
parents:
diff
changeset
|
120 |
if (ShenandoahSATBBarrier) { |
9c18c9d839d3
8214259: Implementation: JEP 189: Shenandoah: A Low-Pause-Time Garbage Collector (Experimental)
rkennke
parents:
diff
changeset
|
121 |
satb_write_barrier_pre(masm, obj, pre_val, thread, tmp, tosca_live, expand_call); |
9c18c9d839d3
8214259: Implementation: JEP 189: Shenandoah: A Low-Pause-Time Garbage Collector (Experimental)
rkennke
parents:
diff
changeset
|
122 |
} |
9c18c9d839d3
8214259: Implementation: JEP 189: Shenandoah: A Low-Pause-Time Garbage Collector (Experimental)
rkennke
parents:
diff
changeset
|
123 |
} |
9c18c9d839d3
8214259: Implementation: JEP 189: Shenandoah: A Low-Pause-Time Garbage Collector (Experimental)
rkennke
parents:
diff
changeset
|
124 |
|
9c18c9d839d3
8214259: Implementation: JEP 189: Shenandoah: A Low-Pause-Time Garbage Collector (Experimental)
rkennke
parents:
diff
changeset
|
125 |
void ShenandoahBarrierSetAssembler::satb_write_barrier_pre(MacroAssembler* masm, |
9c18c9d839d3
8214259: Implementation: JEP 189: Shenandoah: A Low-Pause-Time Garbage Collector (Experimental)
rkennke
parents:
diff
changeset
|
126 |
Register obj, |
9c18c9d839d3
8214259: Implementation: JEP 189: Shenandoah: A Low-Pause-Time Garbage Collector (Experimental)
rkennke
parents:
diff
changeset
|
127 |
Register pre_val, |
9c18c9d839d3
8214259: Implementation: JEP 189: Shenandoah: A Low-Pause-Time Garbage Collector (Experimental)
rkennke
parents:
diff
changeset
|
128 |
Register thread, |
9c18c9d839d3
8214259: Implementation: JEP 189: Shenandoah: A Low-Pause-Time Garbage Collector (Experimental)
rkennke
parents:
diff
changeset
|
129 |
Register tmp, |
9c18c9d839d3
8214259: Implementation: JEP 189: Shenandoah: A Low-Pause-Time Garbage Collector (Experimental)
rkennke
parents:
diff
changeset
|
130 |
bool tosca_live, |
9c18c9d839d3
8214259: Implementation: JEP 189: Shenandoah: A Low-Pause-Time Garbage Collector (Experimental)
rkennke
parents:
diff
changeset
|
131 |
bool expand_call) { |
9c18c9d839d3
8214259: Implementation: JEP 189: Shenandoah: A Low-Pause-Time Garbage Collector (Experimental)
rkennke
parents:
diff
changeset
|
132 |
// If expand_call is true then we expand the call_VM_leaf macro |
9c18c9d839d3
8214259: Implementation: JEP 189: Shenandoah: A Low-Pause-Time Garbage Collector (Experimental)
rkennke
parents:
diff
changeset
|
133 |
// directly to skip generating the check by |
9c18c9d839d3
8214259: Implementation: JEP 189: Shenandoah: A Low-Pause-Time Garbage Collector (Experimental)
rkennke
parents:
diff
changeset
|
134 |
// InterpreterMacroAssembler::call_VM_leaf_base that checks _last_sp. |
9c18c9d839d3
8214259: Implementation: JEP 189: Shenandoah: A Low-Pause-Time Garbage Collector (Experimental)
rkennke
parents:
diff
changeset
|
135 |
|
9c18c9d839d3
8214259: Implementation: JEP 189: Shenandoah: A Low-Pause-Time Garbage Collector (Experimental)
rkennke
parents:
diff
changeset
|
136 |
assert(thread == rthread, "must be"); |
9c18c9d839d3
8214259: Implementation: JEP 189: Shenandoah: A Low-Pause-Time Garbage Collector (Experimental)
rkennke
parents:
diff
changeset
|
137 |
|
9c18c9d839d3
8214259: Implementation: JEP 189: Shenandoah: A Low-Pause-Time Garbage Collector (Experimental)
rkennke
parents:
diff
changeset
|
138 |
Label done; |
9c18c9d839d3
8214259: Implementation: JEP 189: Shenandoah: A Low-Pause-Time Garbage Collector (Experimental)
rkennke
parents:
diff
changeset
|
139 |
Label runtime; |
9c18c9d839d3
8214259: Implementation: JEP 189: Shenandoah: A Low-Pause-Time Garbage Collector (Experimental)
rkennke
parents:
diff
changeset
|
140 |
|
9c18c9d839d3
8214259: Implementation: JEP 189: Shenandoah: A Low-Pause-Time Garbage Collector (Experimental)
rkennke
parents:
diff
changeset
|
141 |
assert_different_registers(obj, pre_val, tmp, rscratch1); |
9c18c9d839d3
8214259: Implementation: JEP 189: Shenandoah: A Low-Pause-Time Garbage Collector (Experimental)
rkennke
parents:
diff
changeset
|
142 |
assert(pre_val != noreg && tmp != noreg, "expecting a register"); |
9c18c9d839d3
8214259: Implementation: JEP 189: Shenandoah: A Low-Pause-Time Garbage Collector (Experimental)
rkennke
parents:
diff
changeset
|
143 |
|
9c18c9d839d3
8214259: Implementation: JEP 189: Shenandoah: A Low-Pause-Time Garbage Collector (Experimental)
rkennke
parents:
diff
changeset
|
144 |
Address in_progress(thread, in_bytes(ShenandoahThreadLocalData::satb_mark_queue_active_offset())); |
9c18c9d839d3
8214259: Implementation: JEP 189: Shenandoah: A Low-Pause-Time Garbage Collector (Experimental)
rkennke
parents:
diff
changeset
|
145 |
Address index(thread, in_bytes(ShenandoahThreadLocalData::satb_mark_queue_index_offset())); |
9c18c9d839d3
8214259: Implementation: JEP 189: Shenandoah: A Low-Pause-Time Garbage Collector (Experimental)
rkennke
parents:
diff
changeset
|
146 |
Address buffer(thread, in_bytes(ShenandoahThreadLocalData::satb_mark_queue_buffer_offset())); |
9c18c9d839d3
8214259: Implementation: JEP 189: Shenandoah: A Low-Pause-Time Garbage Collector (Experimental)
rkennke
parents:
diff
changeset
|
147 |
|
9c18c9d839d3
8214259: Implementation: JEP 189: Shenandoah: A Low-Pause-Time Garbage Collector (Experimental)
rkennke
parents:
diff
changeset
|
148 |
// Is marking active? |
9c18c9d839d3
8214259: Implementation: JEP 189: Shenandoah: A Low-Pause-Time Garbage Collector (Experimental)
rkennke
parents:
diff
changeset
|
149 |
if (in_bytes(SATBMarkQueue::byte_width_of_active()) == 4) { |
9c18c9d839d3
8214259: Implementation: JEP 189: Shenandoah: A Low-Pause-Time Garbage Collector (Experimental)
rkennke
parents:
diff
changeset
|
150 |
__ ldrw(tmp, in_progress); |
9c18c9d839d3
8214259: Implementation: JEP 189: Shenandoah: A Low-Pause-Time Garbage Collector (Experimental)
rkennke
parents:
diff
changeset
|
151 |
} else { |
9c18c9d839d3
8214259: Implementation: JEP 189: Shenandoah: A Low-Pause-Time Garbage Collector (Experimental)
rkennke
parents:
diff
changeset
|
152 |
assert(in_bytes(SATBMarkQueue::byte_width_of_active()) == 1, "Assumption"); |
9c18c9d839d3
8214259: Implementation: JEP 189: Shenandoah: A Low-Pause-Time Garbage Collector (Experimental)
rkennke
parents:
diff
changeset
|
153 |
__ ldrb(tmp, in_progress); |
9c18c9d839d3
8214259: Implementation: JEP 189: Shenandoah: A Low-Pause-Time Garbage Collector (Experimental)
rkennke
parents:
diff
changeset
|
154 |
} |
9c18c9d839d3
8214259: Implementation: JEP 189: Shenandoah: A Low-Pause-Time Garbage Collector (Experimental)
rkennke
parents:
diff
changeset
|
155 |
__ cbzw(tmp, done); |
9c18c9d839d3
8214259: Implementation: JEP 189: Shenandoah: A Low-Pause-Time Garbage Collector (Experimental)
rkennke
parents:
diff
changeset
|
156 |
|
9c18c9d839d3
8214259: Implementation: JEP 189: Shenandoah: A Low-Pause-Time Garbage Collector (Experimental)
rkennke
parents:
diff
changeset
|
157 |
// Do we need to load the previous value? |
9c18c9d839d3
8214259: Implementation: JEP 189: Shenandoah: A Low-Pause-Time Garbage Collector (Experimental)
rkennke
parents:
diff
changeset
|
158 |
if (obj != noreg) { |
9c18c9d839d3
8214259: Implementation: JEP 189: Shenandoah: A Low-Pause-Time Garbage Collector (Experimental)
rkennke
parents:
diff
changeset
|
159 |
__ load_heap_oop(pre_val, Address(obj, 0), noreg, noreg, AS_RAW); |
9c18c9d839d3
8214259: Implementation: JEP 189: Shenandoah: A Low-Pause-Time Garbage Collector (Experimental)
rkennke
parents:
diff
changeset
|
160 |
} |
9c18c9d839d3
8214259: Implementation: JEP 189: Shenandoah: A Low-Pause-Time Garbage Collector (Experimental)
rkennke
parents:
diff
changeset
|
161 |
|
9c18c9d839d3
8214259: Implementation: JEP 189: Shenandoah: A Low-Pause-Time Garbage Collector (Experimental)
rkennke
parents:
diff
changeset
|
162 |
// Is the previous value null? |
9c18c9d839d3
8214259: Implementation: JEP 189: Shenandoah: A Low-Pause-Time Garbage Collector (Experimental)
rkennke
parents:
diff
changeset
|
163 |
__ cbz(pre_val, done); |
9c18c9d839d3
8214259: Implementation: JEP 189: Shenandoah: A Low-Pause-Time Garbage Collector (Experimental)
rkennke
parents:
diff
changeset
|
164 |
|
9c18c9d839d3
8214259: Implementation: JEP 189: Shenandoah: A Low-Pause-Time Garbage Collector (Experimental)
rkennke
parents:
diff
changeset
|
165 |
// Can we store original value in the thread's buffer? |
9c18c9d839d3
8214259: Implementation: JEP 189: Shenandoah: A Low-Pause-Time Garbage Collector (Experimental)
rkennke
parents:
diff
changeset
|
166 |
// Is index == 0? |
9c18c9d839d3
8214259: Implementation: JEP 189: Shenandoah: A Low-Pause-Time Garbage Collector (Experimental)
rkennke
parents:
diff
changeset
|
167 |
// (The index field is typed as size_t.) |
9c18c9d839d3
8214259: Implementation: JEP 189: Shenandoah: A Low-Pause-Time Garbage Collector (Experimental)
rkennke
parents:
diff
changeset
|
168 |
|
9c18c9d839d3
8214259: Implementation: JEP 189: Shenandoah: A Low-Pause-Time Garbage Collector (Experimental)
rkennke
parents:
diff
changeset
|
169 |
__ ldr(tmp, index); // tmp := *index_adr |
9c18c9d839d3
8214259: Implementation: JEP 189: Shenandoah: A Low-Pause-Time Garbage Collector (Experimental)
rkennke
parents:
diff
changeset
|
170 |
__ cbz(tmp, runtime); // tmp == 0? |
9c18c9d839d3
8214259: Implementation: JEP 189: Shenandoah: A Low-Pause-Time Garbage Collector (Experimental)
rkennke
parents:
diff
changeset
|
171 |
// If yes, goto runtime |
9c18c9d839d3
8214259: Implementation: JEP 189: Shenandoah: A Low-Pause-Time Garbage Collector (Experimental)
rkennke
parents:
diff
changeset
|
172 |
|
9c18c9d839d3
8214259: Implementation: JEP 189: Shenandoah: A Low-Pause-Time Garbage Collector (Experimental)
rkennke
parents:
diff
changeset
|
173 |
__ sub(tmp, tmp, wordSize); // tmp := tmp - wordSize |
9c18c9d839d3
8214259: Implementation: JEP 189: Shenandoah: A Low-Pause-Time Garbage Collector (Experimental)
rkennke
parents:
diff
changeset
|
174 |
__ str(tmp, index); // *index_adr := tmp |
9c18c9d839d3
8214259: Implementation: JEP 189: Shenandoah: A Low-Pause-Time Garbage Collector (Experimental)
rkennke
parents:
diff
changeset
|
175 |
__ ldr(rscratch1, buffer); |
9c18c9d839d3
8214259: Implementation: JEP 189: Shenandoah: A Low-Pause-Time Garbage Collector (Experimental)
rkennke
parents:
diff
changeset
|
176 |
__ add(tmp, tmp, rscratch1); // tmp := tmp + *buffer_adr |
9c18c9d839d3
8214259: Implementation: JEP 189: Shenandoah: A Low-Pause-Time Garbage Collector (Experimental)
rkennke
parents:
diff
changeset
|
177 |
|
9c18c9d839d3
8214259: Implementation: JEP 189: Shenandoah: A Low-Pause-Time Garbage Collector (Experimental)
rkennke
parents:
diff
changeset
|
178 |
// Record the previous value |
9c18c9d839d3
8214259: Implementation: JEP 189: Shenandoah: A Low-Pause-Time Garbage Collector (Experimental)
rkennke
parents:
diff
changeset
|
179 |
__ str(pre_val, Address(tmp, 0)); |
9c18c9d839d3
8214259: Implementation: JEP 189: Shenandoah: A Low-Pause-Time Garbage Collector (Experimental)
rkennke
parents:
diff
changeset
|
180 |
__ b(done); |
9c18c9d839d3
8214259: Implementation: JEP 189: Shenandoah: A Low-Pause-Time Garbage Collector (Experimental)
rkennke
parents:
diff
changeset
|
181 |
|
9c18c9d839d3
8214259: Implementation: JEP 189: Shenandoah: A Low-Pause-Time Garbage Collector (Experimental)
rkennke
parents:
diff
changeset
|
182 |
__ bind(runtime); |
9c18c9d839d3
8214259: Implementation: JEP 189: Shenandoah: A Low-Pause-Time Garbage Collector (Experimental)
rkennke
parents:
diff
changeset
|
183 |
// save the live input values |
9c18c9d839d3
8214259: Implementation: JEP 189: Shenandoah: A Low-Pause-Time Garbage Collector (Experimental)
rkennke
parents:
diff
changeset
|
184 |
RegSet saved = RegSet::of(pre_val); |
9c18c9d839d3
8214259: Implementation: JEP 189: Shenandoah: A Low-Pause-Time Garbage Collector (Experimental)
rkennke
parents:
diff
changeset
|
185 |
if (tosca_live) saved += RegSet::of(r0); |
9c18c9d839d3
8214259: Implementation: JEP 189: Shenandoah: A Low-Pause-Time Garbage Collector (Experimental)
rkennke
parents:
diff
changeset
|
186 |
if (obj != noreg) saved += RegSet::of(obj); |
9c18c9d839d3
8214259: Implementation: JEP 189: Shenandoah: A Low-Pause-Time Garbage Collector (Experimental)
rkennke
parents:
diff
changeset
|
187 |
|
9c18c9d839d3
8214259: Implementation: JEP 189: Shenandoah: A Low-Pause-Time Garbage Collector (Experimental)
rkennke
parents:
diff
changeset
|
188 |
__ push(saved, sp); |
9c18c9d839d3
8214259: Implementation: JEP 189: Shenandoah: A Low-Pause-Time Garbage Collector (Experimental)
rkennke
parents:
diff
changeset
|
189 |
|
9c18c9d839d3
8214259: Implementation: JEP 189: Shenandoah: A Low-Pause-Time Garbage Collector (Experimental)
rkennke
parents:
diff
changeset
|
190 |
// Calling the runtime using the regular call_VM_leaf mechanism generates |
9c18c9d839d3
8214259: Implementation: JEP 189: Shenandoah: A Low-Pause-Time Garbage Collector (Experimental)
rkennke
parents:
diff
changeset
|
191 |
// code (generated by InterpreterMacroAssember::call_VM_leaf_base) |
9c18c9d839d3
8214259: Implementation: JEP 189: Shenandoah: A Low-Pause-Time Garbage Collector (Experimental)
rkennke
parents:
diff
changeset
|
192 |
// that checks that the *(rfp+frame::interpreter_frame_last_sp) == NULL. |
9c18c9d839d3
8214259: Implementation: JEP 189: Shenandoah: A Low-Pause-Time Garbage Collector (Experimental)
rkennke
parents:
diff
changeset
|
193 |
// |
9c18c9d839d3
8214259: Implementation: JEP 189: Shenandoah: A Low-Pause-Time Garbage Collector (Experimental)
rkennke
parents:
diff
changeset
|
194 |
// If we care generating the pre-barrier without a frame (e.g. in the |
9c18c9d839d3
8214259: Implementation: JEP 189: Shenandoah: A Low-Pause-Time Garbage Collector (Experimental)
rkennke
parents:
diff
changeset
|
195 |
// intrinsified Reference.get() routine) then ebp might be pointing to |
9c18c9d839d3
8214259: Implementation: JEP 189: Shenandoah: A Low-Pause-Time Garbage Collector (Experimental)
rkennke
parents:
diff
changeset
|
196 |
// the caller frame and so this check will most likely fail at runtime. |
9c18c9d839d3
8214259: Implementation: JEP 189: Shenandoah: A Low-Pause-Time Garbage Collector (Experimental)
rkennke
parents:
diff
changeset
|
197 |
// |
9c18c9d839d3
8214259: Implementation: JEP 189: Shenandoah: A Low-Pause-Time Garbage Collector (Experimental)
rkennke
parents:
diff
changeset
|
198 |
// Expanding the call directly bypasses the generation of the check. |
9c18c9d839d3
8214259: Implementation: JEP 189: Shenandoah: A Low-Pause-Time Garbage Collector (Experimental)
rkennke
parents:
diff
changeset
|
199 |
// So when we do not have have a full interpreter frame on the stack |
9c18c9d839d3
8214259: Implementation: JEP 189: Shenandoah: A Low-Pause-Time Garbage Collector (Experimental)
rkennke
parents:
diff
changeset
|
200 |
// expand_call should be passed true. |
9c18c9d839d3
8214259: Implementation: JEP 189: Shenandoah: A Low-Pause-Time Garbage Collector (Experimental)
rkennke
parents:
diff
changeset
|
201 |
|
9c18c9d839d3
8214259: Implementation: JEP 189: Shenandoah: A Low-Pause-Time Garbage Collector (Experimental)
rkennke
parents:
diff
changeset
|
202 |
if (expand_call) { |
9c18c9d839d3
8214259: Implementation: JEP 189: Shenandoah: A Low-Pause-Time Garbage Collector (Experimental)
rkennke
parents:
diff
changeset
|
203 |
assert(pre_val != c_rarg1, "smashed arg"); |
9c18c9d839d3
8214259: Implementation: JEP 189: Shenandoah: A Low-Pause-Time Garbage Collector (Experimental)
rkennke
parents:
diff
changeset
|
204 |
__ super_call_VM_leaf(CAST_FROM_FN_PTR(address, ShenandoahRuntime::write_ref_field_pre_entry), pre_val, thread); |
9c18c9d839d3
8214259: Implementation: JEP 189: Shenandoah: A Low-Pause-Time Garbage Collector (Experimental)
rkennke
parents:
diff
changeset
|
205 |
} else { |
9c18c9d839d3
8214259: Implementation: JEP 189: Shenandoah: A Low-Pause-Time Garbage Collector (Experimental)
rkennke
parents:
diff
changeset
|
206 |
__ call_VM_leaf(CAST_FROM_FN_PTR(address, ShenandoahRuntime::write_ref_field_pre_entry), pre_val, thread); |
9c18c9d839d3
8214259: Implementation: JEP 189: Shenandoah: A Low-Pause-Time Garbage Collector (Experimental)
rkennke
parents:
diff
changeset
|
207 |
} |
9c18c9d839d3
8214259: Implementation: JEP 189: Shenandoah: A Low-Pause-Time Garbage Collector (Experimental)
rkennke
parents:
diff
changeset
|
208 |
|
9c18c9d839d3
8214259: Implementation: JEP 189: Shenandoah: A Low-Pause-Time Garbage Collector (Experimental)
rkennke
parents:
diff
changeset
|
209 |
__ pop(saved, sp); |
9c18c9d839d3
8214259: Implementation: JEP 189: Shenandoah: A Low-Pause-Time Garbage Collector (Experimental)
rkennke
parents:
diff
changeset
|
210 |
|
9c18c9d839d3
8214259: Implementation: JEP 189: Shenandoah: A Low-Pause-Time Garbage Collector (Experimental)
rkennke
parents:
diff
changeset
|
211 |
__ bind(done); |
9c18c9d839d3
8214259: Implementation: JEP 189: Shenandoah: A Low-Pause-Time Garbage Collector (Experimental)
rkennke
parents:
diff
changeset
|
212 |
} |
9c18c9d839d3
8214259: Implementation: JEP 189: Shenandoah: A Low-Pause-Time Garbage Collector (Experimental)
rkennke
parents:
diff
changeset
|
213 |
|
55076
785a12e0f89b
8224584: Shenandoah: Eliminate forwarding pointer word
rkennke
parents:
54979
diff
changeset
|
214 |
void ShenandoahBarrierSetAssembler::resolve_forward_pointer(MacroAssembler* masm, Register dst, Register tmp) { |
54423 | 215 |
assert(ShenandoahLoadRefBarrier || ShenandoahCASBarrier, "Should be enabled"); |
52925
9c18c9d839d3
8214259: Implementation: JEP 189: Shenandoah: A Low-Pause-Time Garbage Collector (Experimental)
rkennke
parents:
diff
changeset
|
216 |
Label is_null; |
9c18c9d839d3
8214259: Implementation: JEP 189: Shenandoah: A Low-Pause-Time Garbage Collector (Experimental)
rkennke
parents:
diff
changeset
|
217 |
__ cbz(dst, is_null); |
55076
785a12e0f89b
8224584: Shenandoah: Eliminate forwarding pointer word
rkennke
parents:
54979
diff
changeset
|
218 |
resolve_forward_pointer_not_null(masm, dst, tmp); |
52925
9c18c9d839d3
8214259: Implementation: JEP 189: Shenandoah: A Low-Pause-Time Garbage Collector (Experimental)
rkennke
parents:
diff
changeset
|
219 |
__ bind(is_null); |
9c18c9d839d3
8214259: Implementation: JEP 189: Shenandoah: A Low-Pause-Time Garbage Collector (Experimental)
rkennke
parents:
diff
changeset
|
220 |
} |
9c18c9d839d3
8214259: Implementation: JEP 189: Shenandoah: A Low-Pause-Time Garbage Collector (Experimental)
rkennke
parents:
diff
changeset
|
221 |
|
55076
785a12e0f89b
8224584: Shenandoah: Eliminate forwarding pointer word
rkennke
parents:
54979
diff
changeset
|
222 |
// IMPORTANT: This must preserve all registers, even rscratch1 and rscratch2, except those explicitely |
785a12e0f89b
8224584: Shenandoah: Eliminate forwarding pointer word
rkennke
parents:
54979
diff
changeset
|
223 |
// passed in. |
785a12e0f89b
8224584: Shenandoah: Eliminate forwarding pointer word
rkennke
parents:
54979
diff
changeset
|
224 |
void ShenandoahBarrierSetAssembler::resolve_forward_pointer_not_null(MacroAssembler* masm, Register dst, Register tmp) { |
54423 | 225 |
assert(ShenandoahLoadRefBarrier || ShenandoahCASBarrier, "Should be enabled"); |
55076
785a12e0f89b
8224584: Shenandoah: Eliminate forwarding pointer word
rkennke
parents:
54979
diff
changeset
|
226 |
// The below loads the mark word, checks if the lowest two bits are |
785a12e0f89b
8224584: Shenandoah: Eliminate forwarding pointer word
rkennke
parents:
54979
diff
changeset
|
227 |
// set, and if so, clear the lowest two bits and copy the result |
785a12e0f89b
8224584: Shenandoah: Eliminate forwarding pointer word
rkennke
parents:
54979
diff
changeset
|
228 |
// to dst. Otherwise it leaves dst alone. |
785a12e0f89b
8224584: Shenandoah: Eliminate forwarding pointer word
rkennke
parents:
54979
diff
changeset
|
229 |
// Implementing this is surprisingly awkward. I do it here by: |
785a12e0f89b
8224584: Shenandoah: Eliminate forwarding pointer word
rkennke
parents:
54979
diff
changeset
|
230 |
// - Inverting the mark word |
785a12e0f89b
8224584: Shenandoah: Eliminate forwarding pointer word
rkennke
parents:
54979
diff
changeset
|
231 |
// - Test lowest two bits == 0 |
785a12e0f89b
8224584: Shenandoah: Eliminate forwarding pointer word
rkennke
parents:
54979
diff
changeset
|
232 |
// - If so, set the lowest two bits |
785a12e0f89b
8224584: Shenandoah: Eliminate forwarding pointer word
rkennke
parents:
54979
diff
changeset
|
233 |
// - Invert the result back, and copy to dst |
785a12e0f89b
8224584: Shenandoah: Eliminate forwarding pointer word
rkennke
parents:
54979
diff
changeset
|
234 |
|
785a12e0f89b
8224584: Shenandoah: Eliminate forwarding pointer word
rkennke
parents:
54979
diff
changeset
|
235 |
bool borrow_reg = (tmp == noreg); |
785a12e0f89b
8224584: Shenandoah: Eliminate forwarding pointer word
rkennke
parents:
54979
diff
changeset
|
236 |
if (borrow_reg) { |
785a12e0f89b
8224584: Shenandoah: Eliminate forwarding pointer word
rkennke
parents:
54979
diff
changeset
|
237 |
// No free registers available. Make one useful. |
785a12e0f89b
8224584: Shenandoah: Eliminate forwarding pointer word
rkennke
parents:
54979
diff
changeset
|
238 |
tmp = rscratch1; |
785a12e0f89b
8224584: Shenandoah: Eliminate forwarding pointer word
rkennke
parents:
54979
diff
changeset
|
239 |
__ push(RegSet::of(tmp), sp); |
785a12e0f89b
8224584: Shenandoah: Eliminate forwarding pointer word
rkennke
parents:
54979
diff
changeset
|
240 |
} |
785a12e0f89b
8224584: Shenandoah: Eliminate forwarding pointer word
rkennke
parents:
54979
diff
changeset
|
241 |
|
785a12e0f89b
8224584: Shenandoah: Eliminate forwarding pointer word
rkennke
parents:
54979
diff
changeset
|
242 |
Label done; |
785a12e0f89b
8224584: Shenandoah: Eliminate forwarding pointer word
rkennke
parents:
54979
diff
changeset
|
243 |
__ ldr(tmp, Address(dst, oopDesc::mark_offset_in_bytes())); |
785a12e0f89b
8224584: Shenandoah: Eliminate forwarding pointer word
rkennke
parents:
54979
diff
changeset
|
244 |
__ eon(tmp, tmp, zr); |
785a12e0f89b
8224584: Shenandoah: Eliminate forwarding pointer word
rkennke
parents:
54979
diff
changeset
|
245 |
__ ands(zr, tmp, markOopDesc::lock_mask_in_place); |
785a12e0f89b
8224584: Shenandoah: Eliminate forwarding pointer word
rkennke
parents:
54979
diff
changeset
|
246 |
__ br(Assembler::NE, done); |
785a12e0f89b
8224584: Shenandoah: Eliminate forwarding pointer word
rkennke
parents:
54979
diff
changeset
|
247 |
__ orr(tmp, tmp, markOopDesc::marked_value); |
785a12e0f89b
8224584: Shenandoah: Eliminate forwarding pointer word
rkennke
parents:
54979
diff
changeset
|
248 |
__ eon(dst, tmp, zr); |
785a12e0f89b
8224584: Shenandoah: Eliminate forwarding pointer word
rkennke
parents:
54979
diff
changeset
|
249 |
__ bind(done); |
785a12e0f89b
8224584: Shenandoah: Eliminate forwarding pointer word
rkennke
parents:
54979
diff
changeset
|
250 |
|
785a12e0f89b
8224584: Shenandoah: Eliminate forwarding pointer word
rkennke
parents:
54979
diff
changeset
|
251 |
if (borrow_reg) { |
785a12e0f89b
8224584: Shenandoah: Eliminate forwarding pointer word
rkennke
parents:
54979
diff
changeset
|
252 |
__ pop(RegSet::of(tmp), sp); |
785a12e0f89b
8224584: Shenandoah: Eliminate forwarding pointer word
rkennke
parents:
54979
diff
changeset
|
253 |
} |
52925
9c18c9d839d3
8214259: Implementation: JEP 189: Shenandoah: A Low-Pause-Time Garbage Collector (Experimental)
rkennke
parents:
diff
changeset
|
254 |
} |
9c18c9d839d3
8214259: Implementation: JEP 189: Shenandoah: A Low-Pause-Time Garbage Collector (Experimental)
rkennke
parents:
diff
changeset
|
255 |
|
54423 | 256 |
void ShenandoahBarrierSetAssembler::load_reference_barrier_not_null(MacroAssembler* masm, Register dst, Register tmp) { |
257 |
assert(ShenandoahLoadRefBarrier, "Should be enabled"); |
|
52925
9c18c9d839d3
8214259: Implementation: JEP 189: Shenandoah: A Low-Pause-Time Garbage Collector (Experimental)
rkennke
parents:
diff
changeset
|
258 |
assert(dst != rscratch2, "need rscratch2"); |
9c18c9d839d3
8214259: Implementation: JEP 189: Shenandoah: A Low-Pause-Time Garbage Collector (Experimental)
rkennke
parents:
diff
changeset
|
259 |
|
9c18c9d839d3
8214259: Implementation: JEP 189: Shenandoah: A Low-Pause-Time Garbage Collector (Experimental)
rkennke
parents:
diff
changeset
|
260 |
Label done; |
54423 | 261 |
__ enter(); |
52925
9c18c9d839d3
8214259: Implementation: JEP 189: Shenandoah: A Low-Pause-Time Garbage Collector (Experimental)
rkennke
parents:
diff
changeset
|
262 |
Address gc_state(rthread, in_bytes(ShenandoahThreadLocalData::gc_state_offset())); |
54423 | 263 |
__ ldrb(rscratch2, gc_state); |
52925
9c18c9d839d3
8214259: Implementation: JEP 189: Shenandoah: A Low-Pause-Time Garbage Collector (Experimental)
rkennke
parents:
diff
changeset
|
264 |
|
9c18c9d839d3
8214259: Implementation: JEP 189: Shenandoah: A Low-Pause-Time Garbage Collector (Experimental)
rkennke
parents:
diff
changeset
|
265 |
// Check for heap stability |
54423 | 266 |
__ tbz(rscratch2, ShenandoahHeap::HAS_FORWARDED_BITPOS, done); |
52925
9c18c9d839d3
8214259: Implementation: JEP 189: Shenandoah: A Low-Pause-Time Garbage Collector (Experimental)
rkennke
parents:
diff
changeset
|
267 |
|
9c18c9d839d3
8214259: Implementation: JEP 189: Shenandoah: A Low-Pause-Time Garbage Collector (Experimental)
rkennke
parents:
diff
changeset
|
268 |
RegSet to_save = RegSet::of(r0); |
9c18c9d839d3
8214259: Implementation: JEP 189: Shenandoah: A Low-Pause-Time Garbage Collector (Experimental)
rkennke
parents:
diff
changeset
|
269 |
if (dst != r0) { |
9c18c9d839d3
8214259: Implementation: JEP 189: Shenandoah: A Low-Pause-Time Garbage Collector (Experimental)
rkennke
parents:
diff
changeset
|
270 |
__ push(to_save, sp); |
9c18c9d839d3
8214259: Implementation: JEP 189: Shenandoah: A Low-Pause-Time Garbage Collector (Experimental)
rkennke
parents:
diff
changeset
|
271 |
__ mov(r0, dst); |
9c18c9d839d3
8214259: Implementation: JEP 189: Shenandoah: A Low-Pause-Time Garbage Collector (Experimental)
rkennke
parents:
diff
changeset
|
272 |
} |
9c18c9d839d3
8214259: Implementation: JEP 189: Shenandoah: A Low-Pause-Time Garbage Collector (Experimental)
rkennke
parents:
diff
changeset
|
273 |
|
54423 | 274 |
__ far_call(RuntimeAddress(CAST_FROM_FN_PTR(address, ShenandoahBarrierSetAssembler::shenandoah_lrb()))); |
52925
9c18c9d839d3
8214259: Implementation: JEP 189: Shenandoah: A Low-Pause-Time Garbage Collector (Experimental)
rkennke
parents:
diff
changeset
|
275 |
|
9c18c9d839d3
8214259: Implementation: JEP 189: Shenandoah: A Low-Pause-Time Garbage Collector (Experimental)
rkennke
parents:
diff
changeset
|
276 |
if (dst != r0) { |
9c18c9d839d3
8214259: Implementation: JEP 189: Shenandoah: A Low-Pause-Time Garbage Collector (Experimental)
rkennke
parents:
diff
changeset
|
277 |
__ mov(dst, r0); |
9c18c9d839d3
8214259: Implementation: JEP 189: Shenandoah: A Low-Pause-Time Garbage Collector (Experimental)
rkennke
parents:
diff
changeset
|
278 |
__ pop(to_save, sp); |
9c18c9d839d3
8214259: Implementation: JEP 189: Shenandoah: A Low-Pause-Time Garbage Collector (Experimental)
rkennke
parents:
diff
changeset
|
279 |
} |
9c18c9d839d3
8214259: Implementation: JEP 189: Shenandoah: A Low-Pause-Time Garbage Collector (Experimental)
rkennke
parents:
diff
changeset
|
280 |
|
9c18c9d839d3
8214259: Implementation: JEP 189: Shenandoah: A Low-Pause-Time Garbage Collector (Experimental)
rkennke
parents:
diff
changeset
|
281 |
__ bind(done); |
54423 | 282 |
__ leave(); |
52925
9c18c9d839d3
8214259: Implementation: JEP 189: Shenandoah: A Low-Pause-Time Garbage Collector (Experimental)
rkennke
parents:
diff
changeset
|
283 |
} |
9c18c9d839d3
8214259: Implementation: JEP 189: Shenandoah: A Low-Pause-Time Garbage Collector (Experimental)
rkennke
parents:
diff
changeset
|
284 |
|
9c18c9d839d3
8214259: Implementation: JEP 189: Shenandoah: A Low-Pause-Time Garbage Collector (Experimental)
rkennke
parents:
diff
changeset
|
285 |
void ShenandoahBarrierSetAssembler::storeval_barrier(MacroAssembler* masm, Register dst, Register tmp) { |
9c18c9d839d3
8214259: Implementation: JEP 189: Shenandoah: A Low-Pause-Time Garbage Collector (Experimental)
rkennke
parents:
diff
changeset
|
286 |
if (ShenandoahStoreValEnqueueBarrier) { |
9c18c9d839d3
8214259: Implementation: JEP 189: Shenandoah: A Low-Pause-Time Garbage Collector (Experimental)
rkennke
parents:
diff
changeset
|
287 |
// Save possibly live regs. |
9c18c9d839d3
8214259: Implementation: JEP 189: Shenandoah: A Low-Pause-Time Garbage Collector (Experimental)
rkennke
parents:
diff
changeset
|
288 |
RegSet live_regs = RegSet::range(r0, r4) - dst; |
9c18c9d839d3
8214259: Implementation: JEP 189: Shenandoah: A Low-Pause-Time Garbage Collector (Experimental)
rkennke
parents:
diff
changeset
|
289 |
__ push(live_regs, sp); |
9c18c9d839d3
8214259: Implementation: JEP 189: Shenandoah: A Low-Pause-Time Garbage Collector (Experimental)
rkennke
parents:
diff
changeset
|
290 |
__ strd(v0, __ pre(sp, 2 * -wordSize)); |
9c18c9d839d3
8214259: Implementation: JEP 189: Shenandoah: A Low-Pause-Time Garbage Collector (Experimental)
rkennke
parents:
diff
changeset
|
291 |
|
9c18c9d839d3
8214259: Implementation: JEP 189: Shenandoah: A Low-Pause-Time Garbage Collector (Experimental)
rkennke
parents:
diff
changeset
|
292 |
satb_write_barrier_pre(masm, noreg, dst, rthread, tmp, true, false); |
9c18c9d839d3
8214259: Implementation: JEP 189: Shenandoah: A Low-Pause-Time Garbage Collector (Experimental)
rkennke
parents:
diff
changeset
|
293 |
|
9c18c9d839d3
8214259: Implementation: JEP 189: Shenandoah: A Low-Pause-Time Garbage Collector (Experimental)
rkennke
parents:
diff
changeset
|
294 |
// Restore possibly live regs. |
9c18c9d839d3
8214259: Implementation: JEP 189: Shenandoah: A Low-Pause-Time Garbage Collector (Experimental)
rkennke
parents:
diff
changeset
|
295 |
__ ldrd(v0, __ post(sp, 2 * wordSize)); |
9c18c9d839d3
8214259: Implementation: JEP 189: Shenandoah: A Low-Pause-Time Garbage Collector (Experimental)
rkennke
parents:
diff
changeset
|
296 |
__ pop(live_regs, sp); |
9c18c9d839d3
8214259: Implementation: JEP 189: Shenandoah: A Low-Pause-Time Garbage Collector (Experimental)
rkennke
parents:
diff
changeset
|
297 |
} |
54423 | 298 |
} |
299 |
||
300 |
void ShenandoahBarrierSetAssembler::load_reference_barrier(MacroAssembler* masm, Register dst, Register tmp) { |
|
301 |
if (ShenandoahLoadRefBarrier) { |
|
302 |
Label is_null; |
|
303 |
__ cbz(dst, is_null); |
|
304 |
load_reference_barrier_not_null(masm, dst, tmp); |
|
305 |
__ bind(is_null); |
|
52925
9c18c9d839d3
8214259: Implementation: JEP 189: Shenandoah: A Low-Pause-Time Garbage Collector (Experimental)
rkennke
parents:
diff
changeset
|
306 |
} |
9c18c9d839d3
8214259: Implementation: JEP 189: Shenandoah: A Low-Pause-Time Garbage Collector (Experimental)
rkennke
parents:
diff
changeset
|
307 |
} |
9c18c9d839d3
8214259: Implementation: JEP 189: Shenandoah: A Low-Pause-Time Garbage Collector (Experimental)
rkennke
parents:
diff
changeset
|
308 |
|
9c18c9d839d3
8214259: Implementation: JEP 189: Shenandoah: A Low-Pause-Time Garbage Collector (Experimental)
rkennke
parents:
diff
changeset
|
309 |
void ShenandoahBarrierSetAssembler::load_at(MacroAssembler* masm, DecoratorSet decorators, BasicType type, |
9c18c9d839d3
8214259: Implementation: JEP 189: Shenandoah: A Low-Pause-Time Garbage Collector (Experimental)
rkennke
parents:
diff
changeset
|
310 |
Register dst, Address src, Register tmp1, Register tmp_thread) { |
9c18c9d839d3
8214259: Implementation: JEP 189: Shenandoah: A Low-Pause-Time Garbage Collector (Experimental)
rkennke
parents:
diff
changeset
|
311 |
bool on_oop = type == T_OBJECT || type == T_ARRAY; |
9c18c9d839d3
8214259: Implementation: JEP 189: Shenandoah: A Low-Pause-Time Garbage Collector (Experimental)
rkennke
parents:
diff
changeset
|
312 |
bool on_weak = (decorators & ON_WEAK_OOP_REF) != 0; |
9c18c9d839d3
8214259: Implementation: JEP 189: Shenandoah: A Low-Pause-Time Garbage Collector (Experimental)
rkennke
parents:
diff
changeset
|
313 |
bool on_phantom = (decorators & ON_PHANTOM_OOP_REF) != 0; |
9c18c9d839d3
8214259: Implementation: JEP 189: Shenandoah: A Low-Pause-Time Garbage Collector (Experimental)
rkennke
parents:
diff
changeset
|
314 |
bool on_reference = on_weak || on_phantom; |
9c18c9d839d3
8214259: Implementation: JEP 189: Shenandoah: A Low-Pause-Time Garbage Collector (Experimental)
rkennke
parents:
diff
changeset
|
315 |
|
54423 | 316 |
BarrierSetAssembler::load_at(masm, decorators, type, dst, src, tmp1, tmp_thread); |
317 |
if (on_oop) { |
|
318 |
load_reference_barrier(masm, dst, tmp1); |
|
52925
9c18c9d839d3
8214259: Implementation: JEP 189: Shenandoah: A Low-Pause-Time Garbage Collector (Experimental)
rkennke
parents:
diff
changeset
|
319 |
|
54423 | 320 |
if (ShenandoahKeepAliveBarrier && on_reference) { |
321 |
__ enter(); |
|
322 |
satb_write_barrier_pre(masm /* masm */, |
|
323 |
noreg /* obj */, |
|
324 |
dst /* pre_val */, |
|
325 |
rthread /* thread */, |
|
326 |
tmp1 /* tmp */, |
|
327 |
true /* tosca_live */, |
|
328 |
true /* expand_call */); |
|
329 |
__ leave(); |
|
330 |
} |
|
52925
9c18c9d839d3
8214259: Implementation: JEP 189: Shenandoah: A Low-Pause-Time Garbage Collector (Experimental)
rkennke
parents:
diff
changeset
|
331 |
} |
9c18c9d839d3
8214259: Implementation: JEP 189: Shenandoah: A Low-Pause-Time Garbage Collector (Experimental)
rkennke
parents:
diff
changeset
|
332 |
} |
9c18c9d839d3
8214259: Implementation: JEP 189: Shenandoah: A Low-Pause-Time Garbage Collector (Experimental)
rkennke
parents:
diff
changeset
|
333 |
|
9c18c9d839d3
8214259: Implementation: JEP 189: Shenandoah: A Low-Pause-Time Garbage Collector (Experimental)
rkennke
parents:
diff
changeset
|
334 |
void ShenandoahBarrierSetAssembler::store_at(MacroAssembler* masm, DecoratorSet decorators, BasicType type, |
9c18c9d839d3
8214259: Implementation: JEP 189: Shenandoah: A Low-Pause-Time Garbage Collector (Experimental)
rkennke
parents:
diff
changeset
|
335 |
Address dst, Register val, Register tmp1, Register tmp2) { |
9c18c9d839d3
8214259: Implementation: JEP 189: Shenandoah: A Low-Pause-Time Garbage Collector (Experimental)
rkennke
parents:
diff
changeset
|
336 |
bool on_oop = type == T_OBJECT || type == T_ARRAY; |
9c18c9d839d3
8214259: Implementation: JEP 189: Shenandoah: A Low-Pause-Time Garbage Collector (Experimental)
rkennke
parents:
diff
changeset
|
337 |
if (!on_oop) { |
9c18c9d839d3
8214259: Implementation: JEP 189: Shenandoah: A Low-Pause-Time Garbage Collector (Experimental)
rkennke
parents:
diff
changeset
|
338 |
BarrierSetAssembler::store_at(masm, decorators, type, dst, val, tmp1, tmp2); |
9c18c9d839d3
8214259: Implementation: JEP 189: Shenandoah: A Low-Pause-Time Garbage Collector (Experimental)
rkennke
parents:
diff
changeset
|
339 |
return; |
9c18c9d839d3
8214259: Implementation: JEP 189: Shenandoah: A Low-Pause-Time Garbage Collector (Experimental)
rkennke
parents:
diff
changeset
|
340 |
} |
9c18c9d839d3
8214259: Implementation: JEP 189: Shenandoah: A Low-Pause-Time Garbage Collector (Experimental)
rkennke
parents:
diff
changeset
|
341 |
|
9c18c9d839d3
8214259: Implementation: JEP 189: Shenandoah: A Low-Pause-Time Garbage Collector (Experimental)
rkennke
parents:
diff
changeset
|
342 |
// flatten object address if needed |
9c18c9d839d3
8214259: Implementation: JEP 189: Shenandoah: A Low-Pause-Time Garbage Collector (Experimental)
rkennke
parents:
diff
changeset
|
343 |
if (dst.index() == noreg && dst.offset() == 0) { |
9c18c9d839d3
8214259: Implementation: JEP 189: Shenandoah: A Low-Pause-Time Garbage Collector (Experimental)
rkennke
parents:
diff
changeset
|
344 |
if (dst.base() != r3) { |
9c18c9d839d3
8214259: Implementation: JEP 189: Shenandoah: A Low-Pause-Time Garbage Collector (Experimental)
rkennke
parents:
diff
changeset
|
345 |
__ mov(r3, dst.base()); |
9c18c9d839d3
8214259: Implementation: JEP 189: Shenandoah: A Low-Pause-Time Garbage Collector (Experimental)
rkennke
parents:
diff
changeset
|
346 |
} |
9c18c9d839d3
8214259: Implementation: JEP 189: Shenandoah: A Low-Pause-Time Garbage Collector (Experimental)
rkennke
parents:
diff
changeset
|
347 |
} else { |
9c18c9d839d3
8214259: Implementation: JEP 189: Shenandoah: A Low-Pause-Time Garbage Collector (Experimental)
rkennke
parents:
diff
changeset
|
348 |
__ lea(r3, dst); |
9c18c9d839d3
8214259: Implementation: JEP 189: Shenandoah: A Low-Pause-Time Garbage Collector (Experimental)
rkennke
parents:
diff
changeset
|
349 |
} |
9c18c9d839d3
8214259: Implementation: JEP 189: Shenandoah: A Low-Pause-Time Garbage Collector (Experimental)
rkennke
parents:
diff
changeset
|
350 |
|
9c18c9d839d3
8214259: Implementation: JEP 189: Shenandoah: A Low-Pause-Time Garbage Collector (Experimental)
rkennke
parents:
diff
changeset
|
351 |
shenandoah_write_barrier_pre(masm, |
9c18c9d839d3
8214259: Implementation: JEP 189: Shenandoah: A Low-Pause-Time Garbage Collector (Experimental)
rkennke
parents:
diff
changeset
|
352 |
r3 /* obj */, |
9c18c9d839d3
8214259: Implementation: JEP 189: Shenandoah: A Low-Pause-Time Garbage Collector (Experimental)
rkennke
parents:
diff
changeset
|
353 |
tmp2 /* pre_val */, |
9c18c9d839d3
8214259: Implementation: JEP 189: Shenandoah: A Low-Pause-Time Garbage Collector (Experimental)
rkennke
parents:
diff
changeset
|
354 |
rthread /* thread */, |
9c18c9d839d3
8214259: Implementation: JEP 189: Shenandoah: A Low-Pause-Time Garbage Collector (Experimental)
rkennke
parents:
diff
changeset
|
355 |
tmp1 /* tmp */, |
9c18c9d839d3
8214259: Implementation: JEP 189: Shenandoah: A Low-Pause-Time Garbage Collector (Experimental)
rkennke
parents:
diff
changeset
|
356 |
val != noreg /* tosca_live */, |
9c18c9d839d3
8214259: Implementation: JEP 189: Shenandoah: A Low-Pause-Time Garbage Collector (Experimental)
rkennke
parents:
diff
changeset
|
357 |
false /* expand_call */); |
9c18c9d839d3
8214259: Implementation: JEP 189: Shenandoah: A Low-Pause-Time Garbage Collector (Experimental)
rkennke
parents:
diff
changeset
|
358 |
|
9c18c9d839d3
8214259: Implementation: JEP 189: Shenandoah: A Low-Pause-Time Garbage Collector (Experimental)
rkennke
parents:
diff
changeset
|
359 |
if (val == noreg) { |
9c18c9d839d3
8214259: Implementation: JEP 189: Shenandoah: A Low-Pause-Time Garbage Collector (Experimental)
rkennke
parents:
diff
changeset
|
360 |
BarrierSetAssembler::store_at(masm, decorators, type, Address(r3, 0), noreg, noreg, noreg); |
9c18c9d839d3
8214259: Implementation: JEP 189: Shenandoah: A Low-Pause-Time Garbage Collector (Experimental)
rkennke
parents:
diff
changeset
|
361 |
} else { |
9c18c9d839d3
8214259: Implementation: JEP 189: Shenandoah: A Low-Pause-Time Garbage Collector (Experimental)
rkennke
parents:
diff
changeset
|
362 |
storeval_barrier(masm, val, tmp1); |
9c18c9d839d3
8214259: Implementation: JEP 189: Shenandoah: A Low-Pause-Time Garbage Collector (Experimental)
rkennke
parents:
diff
changeset
|
363 |
// G1 barrier needs uncompressed oop for region cross check. |
9c18c9d839d3
8214259: Implementation: JEP 189: Shenandoah: A Low-Pause-Time Garbage Collector (Experimental)
rkennke
parents:
diff
changeset
|
364 |
Register new_val = val; |
9c18c9d839d3
8214259: Implementation: JEP 189: Shenandoah: A Low-Pause-Time Garbage Collector (Experimental)
rkennke
parents:
diff
changeset
|
365 |
if (UseCompressedOops) { |
9c18c9d839d3
8214259: Implementation: JEP 189: Shenandoah: A Low-Pause-Time Garbage Collector (Experimental)
rkennke
parents:
diff
changeset
|
366 |
new_val = rscratch2; |
9c18c9d839d3
8214259: Implementation: JEP 189: Shenandoah: A Low-Pause-Time Garbage Collector (Experimental)
rkennke
parents:
diff
changeset
|
367 |
__ mov(new_val, val); |
9c18c9d839d3
8214259: Implementation: JEP 189: Shenandoah: A Low-Pause-Time Garbage Collector (Experimental)
rkennke
parents:
diff
changeset
|
368 |
} |
9c18c9d839d3
8214259: Implementation: JEP 189: Shenandoah: A Low-Pause-Time Garbage Collector (Experimental)
rkennke
parents:
diff
changeset
|
369 |
BarrierSetAssembler::store_at(masm, decorators, type, Address(r3, 0), val, noreg, noreg); |
9c18c9d839d3
8214259: Implementation: JEP 189: Shenandoah: A Low-Pause-Time Garbage Collector (Experimental)
rkennke
parents:
diff
changeset
|
370 |
} |
9c18c9d839d3
8214259: Implementation: JEP 189: Shenandoah: A Low-Pause-Time Garbage Collector (Experimental)
rkennke
parents:
diff
changeset
|
371 |
|
9c18c9d839d3
8214259: Implementation: JEP 189: Shenandoah: A Low-Pause-Time Garbage Collector (Experimental)
rkennke
parents:
diff
changeset
|
372 |
} |
9c18c9d839d3
8214259: Implementation: JEP 189: Shenandoah: A Low-Pause-Time Garbage Collector (Experimental)
rkennke
parents:
diff
changeset
|
373 |
|
9c18c9d839d3
8214259: Implementation: JEP 189: Shenandoah: A Low-Pause-Time Garbage Collector (Experimental)
rkennke
parents:
diff
changeset
|
374 |
void ShenandoahBarrierSetAssembler::cmpxchg_oop(MacroAssembler* masm, Register addr, Register expected, Register new_val, |
53519
74a5ef4c81cc
8217016: Shenandoah: Streamline generation of CAS barriers
rkennke
parents:
52925
diff
changeset
|
375 |
bool acquire, bool release, bool weak, bool is_cae, |
52925
9c18c9d839d3
8214259: Implementation: JEP 189: Shenandoah: A Low-Pause-Time Garbage Collector (Experimental)
rkennke
parents:
diff
changeset
|
376 |
Register result) { |
53719
3a56e823d843
8217874: Shenandoah: Clobbered register in ShenandoahBarrierSetAssembler::cmpxchg_oop()
rkennke
parents:
53519
diff
changeset
|
377 |
Register tmp1 = rscratch1; |
3a56e823d843
8217874: Shenandoah: Clobbered register in ShenandoahBarrierSetAssembler::cmpxchg_oop()
rkennke
parents:
53519
diff
changeset
|
378 |
Register tmp2 = rscratch2; |
52925
9c18c9d839d3
8214259: Implementation: JEP 189: Shenandoah: A Low-Pause-Time Garbage Collector (Experimental)
rkennke
parents:
diff
changeset
|
379 |
bool is_narrow = UseCompressedOops; |
9c18c9d839d3
8214259: Implementation: JEP 189: Shenandoah: A Low-Pause-Time Garbage Collector (Experimental)
rkennke
parents:
diff
changeset
|
380 |
Assembler::operand_size size = is_narrow ? Assembler::word : Assembler::xword; |
9c18c9d839d3
8214259: Implementation: JEP 189: Shenandoah: A Low-Pause-Time Garbage Collector (Experimental)
rkennke
parents:
diff
changeset
|
381 |
|
53719
3a56e823d843
8217874: Shenandoah: Clobbered register in ShenandoahBarrierSetAssembler::cmpxchg_oop()
rkennke
parents:
53519
diff
changeset
|
382 |
assert_different_registers(addr, expected, new_val, tmp1, tmp2); |
52925
9c18c9d839d3
8214259: Implementation: JEP 189: Shenandoah: A Low-Pause-Time Garbage Collector (Experimental)
rkennke
parents:
diff
changeset
|
383 |
|
9c18c9d839d3
8214259: Implementation: JEP 189: Shenandoah: A Low-Pause-Time Garbage Collector (Experimental)
rkennke
parents:
diff
changeset
|
384 |
Label retry, done, fail; |
9c18c9d839d3
8214259: Implementation: JEP 189: Shenandoah: A Low-Pause-Time Garbage Collector (Experimental)
rkennke
parents:
diff
changeset
|
385 |
|
9c18c9d839d3
8214259: Implementation: JEP 189: Shenandoah: A Low-Pause-Time Garbage Collector (Experimental)
rkennke
parents:
diff
changeset
|
386 |
// CAS, using LL/SC pair. |
9c18c9d839d3
8214259: Implementation: JEP 189: Shenandoah: A Low-Pause-Time Garbage Collector (Experimental)
rkennke
parents:
diff
changeset
|
387 |
__ bind(retry); |
53719
3a56e823d843
8217874: Shenandoah: Clobbered register in ShenandoahBarrierSetAssembler::cmpxchg_oop()
rkennke
parents:
53519
diff
changeset
|
388 |
__ load_exclusive(tmp1, addr, size, acquire); |
52925
9c18c9d839d3
8214259: Implementation: JEP 189: Shenandoah: A Low-Pause-Time Garbage Collector (Experimental)
rkennke
parents:
diff
changeset
|
389 |
if (is_narrow) { |
53719
3a56e823d843
8217874: Shenandoah: Clobbered register in ShenandoahBarrierSetAssembler::cmpxchg_oop()
rkennke
parents:
53519
diff
changeset
|
390 |
__ cmpw(tmp1, expected); |
52925
9c18c9d839d3
8214259: Implementation: JEP 189: Shenandoah: A Low-Pause-Time Garbage Collector (Experimental)
rkennke
parents:
diff
changeset
|
391 |
} else { |
53719
3a56e823d843
8217874: Shenandoah: Clobbered register in ShenandoahBarrierSetAssembler::cmpxchg_oop()
rkennke
parents:
53519
diff
changeset
|
392 |
__ cmp(tmp1, expected); |
52925
9c18c9d839d3
8214259: Implementation: JEP 189: Shenandoah: A Low-Pause-Time Garbage Collector (Experimental)
rkennke
parents:
diff
changeset
|
393 |
} |
9c18c9d839d3
8214259: Implementation: JEP 189: Shenandoah: A Low-Pause-Time Garbage Collector (Experimental)
rkennke
parents:
diff
changeset
|
394 |
__ br(Assembler::NE, fail); |
53719
3a56e823d843
8217874: Shenandoah: Clobbered register in ShenandoahBarrierSetAssembler::cmpxchg_oop()
rkennke
parents:
53519
diff
changeset
|
395 |
__ store_exclusive(tmp2, new_val, addr, size, release); |
52925
9c18c9d839d3
8214259: Implementation: JEP 189: Shenandoah: A Low-Pause-Time Garbage Collector (Experimental)
rkennke
parents:
diff
changeset
|
396 |
if (weak) { |
53719
3a56e823d843
8217874: Shenandoah: Clobbered register in ShenandoahBarrierSetAssembler::cmpxchg_oop()
rkennke
parents:
53519
diff
changeset
|
397 |
__ cmpw(tmp2, 0u); // If the store fails, return NE to our caller |
52925
9c18c9d839d3
8214259: Implementation: JEP 189: Shenandoah: A Low-Pause-Time Garbage Collector (Experimental)
rkennke
parents:
diff
changeset
|
398 |
} else { |
53719
3a56e823d843
8217874: Shenandoah: Clobbered register in ShenandoahBarrierSetAssembler::cmpxchg_oop()
rkennke
parents:
53519
diff
changeset
|
399 |
__ cbnzw(tmp2, retry); |
52925
9c18c9d839d3
8214259: Implementation: JEP 189: Shenandoah: A Low-Pause-Time Garbage Collector (Experimental)
rkennke
parents:
diff
changeset
|
400 |
} |
9c18c9d839d3
8214259: Implementation: JEP 189: Shenandoah: A Low-Pause-Time Garbage Collector (Experimental)
rkennke
parents:
diff
changeset
|
401 |
__ b(done); |
9c18c9d839d3
8214259: Implementation: JEP 189: Shenandoah: A Low-Pause-Time Garbage Collector (Experimental)
rkennke
parents:
diff
changeset
|
402 |
|
9c18c9d839d3
8214259: Implementation: JEP 189: Shenandoah: A Low-Pause-Time Garbage Collector (Experimental)
rkennke
parents:
diff
changeset
|
403 |
__ bind(fail); |
53719
3a56e823d843
8217874: Shenandoah: Clobbered register in ShenandoahBarrierSetAssembler::cmpxchg_oop()
rkennke
parents:
53519
diff
changeset
|
404 |
// Check if rb(expected)==rb(tmp1) |
52925
9c18c9d839d3
8214259: Implementation: JEP 189: Shenandoah: A Low-Pause-Time Garbage Collector (Experimental)
rkennke
parents:
diff
changeset
|
405 |
// Shuffle registers so that we have memory value ready for next expected. |
53719
3a56e823d843
8217874: Shenandoah: Clobbered register in ShenandoahBarrierSetAssembler::cmpxchg_oop()
rkennke
parents:
53519
diff
changeset
|
406 |
__ mov(tmp2, expected); |
3a56e823d843
8217874: Shenandoah: Clobbered register in ShenandoahBarrierSetAssembler::cmpxchg_oop()
rkennke
parents:
53519
diff
changeset
|
407 |
__ mov(expected, tmp1); |
52925
9c18c9d839d3
8214259: Implementation: JEP 189: Shenandoah: A Low-Pause-Time Garbage Collector (Experimental)
rkennke
parents:
diff
changeset
|
408 |
if (is_narrow) { |
53719
3a56e823d843
8217874: Shenandoah: Clobbered register in ShenandoahBarrierSetAssembler::cmpxchg_oop()
rkennke
parents:
53519
diff
changeset
|
409 |
__ decode_heap_oop(tmp1, tmp1); |
3a56e823d843
8217874: Shenandoah: Clobbered register in ShenandoahBarrierSetAssembler::cmpxchg_oop()
rkennke
parents:
53519
diff
changeset
|
410 |
__ decode_heap_oop(tmp2, tmp2); |
52925
9c18c9d839d3
8214259: Implementation: JEP 189: Shenandoah: A Low-Pause-Time Garbage Collector (Experimental)
rkennke
parents:
diff
changeset
|
411 |
} |
54423 | 412 |
resolve_forward_pointer(masm, tmp1); |
413 |
resolve_forward_pointer(masm, tmp2); |
|
53719
3a56e823d843
8217874: Shenandoah: Clobbered register in ShenandoahBarrierSetAssembler::cmpxchg_oop()
rkennke
parents:
53519
diff
changeset
|
414 |
__ cmp(tmp1, tmp2); |
52925
9c18c9d839d3
8214259: Implementation: JEP 189: Shenandoah: A Low-Pause-Time Garbage Collector (Experimental)
rkennke
parents:
diff
changeset
|
415 |
// Retry with expected now being the value we just loaded from addr. |
9c18c9d839d3
8214259: Implementation: JEP 189: Shenandoah: A Low-Pause-Time Garbage Collector (Experimental)
rkennke
parents:
diff
changeset
|
416 |
__ br(Assembler::EQ, retry); |
53519
74a5ef4c81cc
8217016: Shenandoah: Streamline generation of CAS barriers
rkennke
parents:
52925
diff
changeset
|
417 |
if (is_cae && is_narrow) { |
52925
9c18c9d839d3
8214259: Implementation: JEP 189: Shenandoah: A Low-Pause-Time Garbage Collector (Experimental)
rkennke
parents:
diff
changeset
|
418 |
// For cmp-and-exchange and narrow oops, we need to restore |
9c18c9d839d3
8214259: Implementation: JEP 189: Shenandoah: A Low-Pause-Time Garbage Collector (Experimental)
rkennke
parents:
diff
changeset
|
419 |
// the compressed old-value. We moved it to 'expected' a few lines up. |
53719
3a56e823d843
8217874: Shenandoah: Clobbered register in ShenandoahBarrierSetAssembler::cmpxchg_oop()
rkennke
parents:
53519
diff
changeset
|
420 |
__ mov(tmp1, expected); |
52925
9c18c9d839d3
8214259: Implementation: JEP 189: Shenandoah: A Low-Pause-Time Garbage Collector (Experimental)
rkennke
parents:
diff
changeset
|
421 |
} |
9c18c9d839d3
8214259: Implementation: JEP 189: Shenandoah: A Low-Pause-Time Garbage Collector (Experimental)
rkennke
parents:
diff
changeset
|
422 |
__ bind(done); |
9c18c9d839d3
8214259: Implementation: JEP 189: Shenandoah: A Low-Pause-Time Garbage Collector (Experimental)
rkennke
parents:
diff
changeset
|
423 |
|
53719
3a56e823d843
8217874: Shenandoah: Clobbered register in ShenandoahBarrierSetAssembler::cmpxchg_oop()
rkennke
parents:
53519
diff
changeset
|
424 |
if (is_cae) { |
3a56e823d843
8217874: Shenandoah: Clobbered register in ShenandoahBarrierSetAssembler::cmpxchg_oop()
rkennke
parents:
53519
diff
changeset
|
425 |
__ mov(result, tmp1); |
3a56e823d843
8217874: Shenandoah: Clobbered register in ShenandoahBarrierSetAssembler::cmpxchg_oop()
rkennke
parents:
53519
diff
changeset
|
426 |
} else { |
53519
74a5ef4c81cc
8217016: Shenandoah: Streamline generation of CAS barriers
rkennke
parents:
52925
diff
changeset
|
427 |
__ cset(result, Assembler::EQ); |
74a5ef4c81cc
8217016: Shenandoah: Streamline generation of CAS barriers
rkennke
parents:
52925
diff
changeset
|
428 |
} |
52925
9c18c9d839d3
8214259: Implementation: JEP 189: Shenandoah: A Low-Pause-Time Garbage Collector (Experimental)
rkennke
parents:
diff
changeset
|
429 |
} |
9c18c9d839d3
8214259: Implementation: JEP 189: Shenandoah: A Low-Pause-Time Garbage Collector (Experimental)
rkennke
parents:
diff
changeset
|
430 |
|
54763
2584e5772546
8222926: Shenandoah build fails with --with-jvm-features=-compiler1
aoqi
parents:
54425
diff
changeset
|
431 |
#undef __ |
2584e5772546
8222926: Shenandoah build fails with --with-jvm-features=-compiler1
aoqi
parents:
54425
diff
changeset
|
432 |
|
52925
9c18c9d839d3
8214259: Implementation: JEP 189: Shenandoah: A Low-Pause-Time Garbage Collector (Experimental)
rkennke
parents:
diff
changeset
|
433 |
#ifdef COMPILER1 |
9c18c9d839d3
8214259: Implementation: JEP 189: Shenandoah: A Low-Pause-Time Garbage Collector (Experimental)
rkennke
parents:
diff
changeset
|
434 |
|
9c18c9d839d3
8214259: Implementation: JEP 189: Shenandoah: A Low-Pause-Time Garbage Collector (Experimental)
rkennke
parents:
diff
changeset
|
435 |
#define __ ce->masm()-> |
9c18c9d839d3
8214259: Implementation: JEP 189: Shenandoah: A Low-Pause-Time Garbage Collector (Experimental)
rkennke
parents:
diff
changeset
|
436 |
|
9c18c9d839d3
8214259: Implementation: JEP 189: Shenandoah: A Low-Pause-Time Garbage Collector (Experimental)
rkennke
parents:
diff
changeset
|
437 |
void ShenandoahBarrierSetAssembler::gen_pre_barrier_stub(LIR_Assembler* ce, ShenandoahPreBarrierStub* stub) { |
9c18c9d839d3
8214259: Implementation: JEP 189: Shenandoah: A Low-Pause-Time Garbage Collector (Experimental)
rkennke
parents:
diff
changeset
|
438 |
ShenandoahBarrierSetC1* bs = (ShenandoahBarrierSetC1*)BarrierSet::barrier_set()->barrier_set_c1(); |
9c18c9d839d3
8214259: Implementation: JEP 189: Shenandoah: A Low-Pause-Time Garbage Collector (Experimental)
rkennke
parents:
diff
changeset
|
439 |
// At this point we know that marking is in progress. |
9c18c9d839d3
8214259: Implementation: JEP 189: Shenandoah: A Low-Pause-Time Garbage Collector (Experimental)
rkennke
parents:
diff
changeset
|
440 |
// If do_load() is true then we have to emit the |
9c18c9d839d3
8214259: Implementation: JEP 189: Shenandoah: A Low-Pause-Time Garbage Collector (Experimental)
rkennke
parents:
diff
changeset
|
441 |
// load of the previous value; otherwise it has already |
9c18c9d839d3
8214259: Implementation: JEP 189: Shenandoah: A Low-Pause-Time Garbage Collector (Experimental)
rkennke
parents:
diff
changeset
|
442 |
// been loaded into _pre_val. |
9c18c9d839d3
8214259: Implementation: JEP 189: Shenandoah: A Low-Pause-Time Garbage Collector (Experimental)
rkennke
parents:
diff
changeset
|
443 |
|
9c18c9d839d3
8214259: Implementation: JEP 189: Shenandoah: A Low-Pause-Time Garbage Collector (Experimental)
rkennke
parents:
diff
changeset
|
444 |
__ bind(*stub->entry()); |
9c18c9d839d3
8214259: Implementation: JEP 189: Shenandoah: A Low-Pause-Time Garbage Collector (Experimental)
rkennke
parents:
diff
changeset
|
445 |
|
9c18c9d839d3
8214259: Implementation: JEP 189: Shenandoah: A Low-Pause-Time Garbage Collector (Experimental)
rkennke
parents:
diff
changeset
|
446 |
assert(stub->pre_val()->is_register(), "Precondition."); |
9c18c9d839d3
8214259: Implementation: JEP 189: Shenandoah: A Low-Pause-Time Garbage Collector (Experimental)
rkennke
parents:
diff
changeset
|
447 |
|
9c18c9d839d3
8214259: Implementation: JEP 189: Shenandoah: A Low-Pause-Time Garbage Collector (Experimental)
rkennke
parents:
diff
changeset
|
448 |
Register pre_val_reg = stub->pre_val()->as_register(); |
9c18c9d839d3
8214259: Implementation: JEP 189: Shenandoah: A Low-Pause-Time Garbage Collector (Experimental)
rkennke
parents:
diff
changeset
|
449 |
|
9c18c9d839d3
8214259: Implementation: JEP 189: Shenandoah: A Low-Pause-Time Garbage Collector (Experimental)
rkennke
parents:
diff
changeset
|
450 |
if (stub->do_load()) { |
9c18c9d839d3
8214259: Implementation: JEP 189: Shenandoah: A Low-Pause-Time Garbage Collector (Experimental)
rkennke
parents:
diff
changeset
|
451 |
ce->mem2reg(stub->addr(), stub->pre_val(), T_OBJECT, stub->patch_code(), stub->info(), false /*wide*/, false /*unaligned*/); |
9c18c9d839d3
8214259: Implementation: JEP 189: Shenandoah: A Low-Pause-Time Garbage Collector (Experimental)
rkennke
parents:
diff
changeset
|
452 |
} |
9c18c9d839d3
8214259: Implementation: JEP 189: Shenandoah: A Low-Pause-Time Garbage Collector (Experimental)
rkennke
parents:
diff
changeset
|
453 |
__ cbz(pre_val_reg, *stub->continuation()); |
9c18c9d839d3
8214259: Implementation: JEP 189: Shenandoah: A Low-Pause-Time Garbage Collector (Experimental)
rkennke
parents:
diff
changeset
|
454 |
ce->store_parameter(stub->pre_val()->as_register(), 0); |
9c18c9d839d3
8214259: Implementation: JEP 189: Shenandoah: A Low-Pause-Time Garbage Collector (Experimental)
rkennke
parents:
diff
changeset
|
455 |
__ far_call(RuntimeAddress(bs->pre_barrier_c1_runtime_code_blob()->code_begin())); |
9c18c9d839d3
8214259: Implementation: JEP 189: Shenandoah: A Low-Pause-Time Garbage Collector (Experimental)
rkennke
parents:
diff
changeset
|
456 |
__ b(*stub->continuation()); |
9c18c9d839d3
8214259: Implementation: JEP 189: Shenandoah: A Low-Pause-Time Garbage Collector (Experimental)
rkennke
parents:
diff
changeset
|
457 |
} |
9c18c9d839d3
8214259: Implementation: JEP 189: Shenandoah: A Low-Pause-Time Garbage Collector (Experimental)
rkennke
parents:
diff
changeset
|
458 |
|
54423 | 459 |
void ShenandoahBarrierSetAssembler::gen_load_reference_barrier_stub(LIR_Assembler* ce, ShenandoahLoadReferenceBarrierStub* stub) { |
52925
9c18c9d839d3
8214259: Implementation: JEP 189: Shenandoah: A Low-Pause-Time Garbage Collector (Experimental)
rkennke
parents:
diff
changeset
|
460 |
|
9c18c9d839d3
8214259: Implementation: JEP 189: Shenandoah: A Low-Pause-Time Garbage Collector (Experimental)
rkennke
parents:
diff
changeset
|
461 |
Register obj = stub->obj()->as_register(); |
9c18c9d839d3
8214259: Implementation: JEP 189: Shenandoah: A Low-Pause-Time Garbage Collector (Experimental)
rkennke
parents:
diff
changeset
|
462 |
Register res = stub->result()->as_register(); |
9c18c9d839d3
8214259: Implementation: JEP 189: Shenandoah: A Low-Pause-Time Garbage Collector (Experimental)
rkennke
parents:
diff
changeset
|
463 |
|
9c18c9d839d3
8214259: Implementation: JEP 189: Shenandoah: A Low-Pause-Time Garbage Collector (Experimental)
rkennke
parents:
diff
changeset
|
464 |
Label done; |
9c18c9d839d3
8214259: Implementation: JEP 189: Shenandoah: A Low-Pause-Time Garbage Collector (Experimental)
rkennke
parents:
diff
changeset
|
465 |
|
9c18c9d839d3
8214259: Implementation: JEP 189: Shenandoah: A Low-Pause-Time Garbage Collector (Experimental)
rkennke
parents:
diff
changeset
|
466 |
__ bind(*stub->entry()); |
9c18c9d839d3
8214259: Implementation: JEP 189: Shenandoah: A Low-Pause-Time Garbage Collector (Experimental)
rkennke
parents:
diff
changeset
|
467 |
|
9c18c9d839d3
8214259: Implementation: JEP 189: Shenandoah: A Low-Pause-Time Garbage Collector (Experimental)
rkennke
parents:
diff
changeset
|
468 |
if (res != obj) { |
9c18c9d839d3
8214259: Implementation: JEP 189: Shenandoah: A Low-Pause-Time Garbage Collector (Experimental)
rkennke
parents:
diff
changeset
|
469 |
__ mov(res, obj); |
9c18c9d839d3
8214259: Implementation: JEP 189: Shenandoah: A Low-Pause-Time Garbage Collector (Experimental)
rkennke
parents:
diff
changeset
|
470 |
} |
9c18c9d839d3
8214259: Implementation: JEP 189: Shenandoah: A Low-Pause-Time Garbage Collector (Experimental)
rkennke
parents:
diff
changeset
|
471 |
// Check for null. |
9c18c9d839d3
8214259: Implementation: JEP 189: Shenandoah: A Low-Pause-Time Garbage Collector (Experimental)
rkennke
parents:
diff
changeset
|
472 |
if (stub->needs_null_check()) { |
9c18c9d839d3
8214259: Implementation: JEP 189: Shenandoah: A Low-Pause-Time Garbage Collector (Experimental)
rkennke
parents:
diff
changeset
|
473 |
__ cbz(res, done); |
9c18c9d839d3
8214259: Implementation: JEP 189: Shenandoah: A Low-Pause-Time Garbage Collector (Experimental)
rkennke
parents:
diff
changeset
|
474 |
} |
9c18c9d839d3
8214259: Implementation: JEP 189: Shenandoah: A Low-Pause-Time Garbage Collector (Experimental)
rkennke
parents:
diff
changeset
|
475 |
|
54423 | 476 |
load_reference_barrier_not_null(ce->masm(), res, rscratch1); |
52925
9c18c9d839d3
8214259: Implementation: JEP 189: Shenandoah: A Low-Pause-Time Garbage Collector (Experimental)
rkennke
parents:
diff
changeset
|
477 |
|
9c18c9d839d3
8214259: Implementation: JEP 189: Shenandoah: A Low-Pause-Time Garbage Collector (Experimental)
rkennke
parents:
diff
changeset
|
478 |
__ bind(done); |
9c18c9d839d3
8214259: Implementation: JEP 189: Shenandoah: A Low-Pause-Time Garbage Collector (Experimental)
rkennke
parents:
diff
changeset
|
479 |
__ b(*stub->continuation()); |
9c18c9d839d3
8214259: Implementation: JEP 189: Shenandoah: A Low-Pause-Time Garbage Collector (Experimental)
rkennke
parents:
diff
changeset
|
480 |
} |
9c18c9d839d3
8214259: Implementation: JEP 189: Shenandoah: A Low-Pause-Time Garbage Collector (Experimental)
rkennke
parents:
diff
changeset
|
481 |
|
9c18c9d839d3
8214259: Implementation: JEP 189: Shenandoah: A Low-Pause-Time Garbage Collector (Experimental)
rkennke
parents:
diff
changeset
|
482 |
#undef __ |
9c18c9d839d3
8214259: Implementation: JEP 189: Shenandoah: A Low-Pause-Time Garbage Collector (Experimental)
rkennke
parents:
diff
changeset
|
483 |
|
9c18c9d839d3
8214259: Implementation: JEP 189: Shenandoah: A Low-Pause-Time Garbage Collector (Experimental)
rkennke
parents:
diff
changeset
|
484 |
#define __ sasm-> |
9c18c9d839d3
8214259: Implementation: JEP 189: Shenandoah: A Low-Pause-Time Garbage Collector (Experimental)
rkennke
parents:
diff
changeset
|
485 |
|
9c18c9d839d3
8214259: Implementation: JEP 189: Shenandoah: A Low-Pause-Time Garbage Collector (Experimental)
rkennke
parents:
diff
changeset
|
486 |
void ShenandoahBarrierSetAssembler::generate_c1_pre_barrier_runtime_stub(StubAssembler* sasm) { |
9c18c9d839d3
8214259: Implementation: JEP 189: Shenandoah: A Low-Pause-Time Garbage Collector (Experimental)
rkennke
parents:
diff
changeset
|
487 |
__ prologue("shenandoah_pre_barrier", false); |
9c18c9d839d3
8214259: Implementation: JEP 189: Shenandoah: A Low-Pause-Time Garbage Collector (Experimental)
rkennke
parents:
diff
changeset
|
488 |
|
9c18c9d839d3
8214259: Implementation: JEP 189: Shenandoah: A Low-Pause-Time Garbage Collector (Experimental)
rkennke
parents:
diff
changeset
|
489 |
// arg0 : previous value of memory |
9c18c9d839d3
8214259: Implementation: JEP 189: Shenandoah: A Low-Pause-Time Garbage Collector (Experimental)
rkennke
parents:
diff
changeset
|
490 |
|
9c18c9d839d3
8214259: Implementation: JEP 189: Shenandoah: A Low-Pause-Time Garbage Collector (Experimental)
rkennke
parents:
diff
changeset
|
491 |
BarrierSet* bs = BarrierSet::barrier_set(); |
9c18c9d839d3
8214259: Implementation: JEP 189: Shenandoah: A Low-Pause-Time Garbage Collector (Experimental)
rkennke
parents:
diff
changeset
|
492 |
|
9c18c9d839d3
8214259: Implementation: JEP 189: Shenandoah: A Low-Pause-Time Garbage Collector (Experimental)
rkennke
parents:
diff
changeset
|
493 |
const Register pre_val = r0; |
9c18c9d839d3
8214259: Implementation: JEP 189: Shenandoah: A Low-Pause-Time Garbage Collector (Experimental)
rkennke
parents:
diff
changeset
|
494 |
const Register thread = rthread; |
9c18c9d839d3
8214259: Implementation: JEP 189: Shenandoah: A Low-Pause-Time Garbage Collector (Experimental)
rkennke
parents:
diff
changeset
|
495 |
const Register tmp = rscratch1; |
9c18c9d839d3
8214259: Implementation: JEP 189: Shenandoah: A Low-Pause-Time Garbage Collector (Experimental)
rkennke
parents:
diff
changeset
|
496 |
|
9c18c9d839d3
8214259: Implementation: JEP 189: Shenandoah: A Low-Pause-Time Garbage Collector (Experimental)
rkennke
parents:
diff
changeset
|
497 |
Address queue_index(thread, in_bytes(ShenandoahThreadLocalData::satb_mark_queue_index_offset())); |
9c18c9d839d3
8214259: Implementation: JEP 189: Shenandoah: A Low-Pause-Time Garbage Collector (Experimental)
rkennke
parents:
diff
changeset
|
498 |
Address buffer(thread, in_bytes(ShenandoahThreadLocalData::satb_mark_queue_buffer_offset())); |
9c18c9d839d3
8214259: Implementation: JEP 189: Shenandoah: A Low-Pause-Time Garbage Collector (Experimental)
rkennke
parents:
diff
changeset
|
499 |
|
9c18c9d839d3
8214259: Implementation: JEP 189: Shenandoah: A Low-Pause-Time Garbage Collector (Experimental)
rkennke
parents:
diff
changeset
|
500 |
Label done; |
9c18c9d839d3
8214259: Implementation: JEP 189: Shenandoah: A Low-Pause-Time Garbage Collector (Experimental)
rkennke
parents:
diff
changeset
|
501 |
Label runtime; |
9c18c9d839d3
8214259: Implementation: JEP 189: Shenandoah: A Low-Pause-Time Garbage Collector (Experimental)
rkennke
parents:
diff
changeset
|
502 |
|
9c18c9d839d3
8214259: Implementation: JEP 189: Shenandoah: A Low-Pause-Time Garbage Collector (Experimental)
rkennke
parents:
diff
changeset
|
503 |
// Is marking still active? |
9c18c9d839d3
8214259: Implementation: JEP 189: Shenandoah: A Low-Pause-Time Garbage Collector (Experimental)
rkennke
parents:
diff
changeset
|
504 |
Address gc_state(thread, in_bytes(ShenandoahThreadLocalData::gc_state_offset())); |
9c18c9d839d3
8214259: Implementation: JEP 189: Shenandoah: A Low-Pause-Time Garbage Collector (Experimental)
rkennke
parents:
diff
changeset
|
505 |
__ ldrb(tmp, gc_state); |
9c18c9d839d3
8214259: Implementation: JEP 189: Shenandoah: A Low-Pause-Time Garbage Collector (Experimental)
rkennke
parents:
diff
changeset
|
506 |
__ mov(rscratch2, ShenandoahHeap::MARKING | ShenandoahHeap::TRAVERSAL); |
9c18c9d839d3
8214259: Implementation: JEP 189: Shenandoah: A Low-Pause-Time Garbage Collector (Experimental)
rkennke
parents:
diff
changeset
|
507 |
__ tst(tmp, rscratch2); |
9c18c9d839d3
8214259: Implementation: JEP 189: Shenandoah: A Low-Pause-Time Garbage Collector (Experimental)
rkennke
parents:
diff
changeset
|
508 |
__ br(Assembler::EQ, done); |
9c18c9d839d3
8214259: Implementation: JEP 189: Shenandoah: A Low-Pause-Time Garbage Collector (Experimental)
rkennke
parents:
diff
changeset
|
509 |
|
9c18c9d839d3
8214259: Implementation: JEP 189: Shenandoah: A Low-Pause-Time Garbage Collector (Experimental)
rkennke
parents:
diff
changeset
|
510 |
// Can we store original value in the thread's buffer? |
9c18c9d839d3
8214259: Implementation: JEP 189: Shenandoah: A Low-Pause-Time Garbage Collector (Experimental)
rkennke
parents:
diff
changeset
|
511 |
__ ldr(tmp, queue_index); |
9c18c9d839d3
8214259: Implementation: JEP 189: Shenandoah: A Low-Pause-Time Garbage Collector (Experimental)
rkennke
parents:
diff
changeset
|
512 |
__ cbz(tmp, runtime); |
9c18c9d839d3
8214259: Implementation: JEP 189: Shenandoah: A Low-Pause-Time Garbage Collector (Experimental)
rkennke
parents:
diff
changeset
|
513 |
|
9c18c9d839d3
8214259: Implementation: JEP 189: Shenandoah: A Low-Pause-Time Garbage Collector (Experimental)
rkennke
parents:
diff
changeset
|
514 |
__ sub(tmp, tmp, wordSize); |
9c18c9d839d3
8214259: Implementation: JEP 189: Shenandoah: A Low-Pause-Time Garbage Collector (Experimental)
rkennke
parents:
diff
changeset
|
515 |
__ str(tmp, queue_index); |
9c18c9d839d3
8214259: Implementation: JEP 189: Shenandoah: A Low-Pause-Time Garbage Collector (Experimental)
rkennke
parents:
diff
changeset
|
516 |
__ ldr(rscratch2, buffer); |
9c18c9d839d3
8214259: Implementation: JEP 189: Shenandoah: A Low-Pause-Time Garbage Collector (Experimental)
rkennke
parents:
diff
changeset
|
517 |
__ add(tmp, tmp, rscratch2); |
9c18c9d839d3
8214259: Implementation: JEP 189: Shenandoah: A Low-Pause-Time Garbage Collector (Experimental)
rkennke
parents:
diff
changeset
|
518 |
__ load_parameter(0, rscratch2); |
9c18c9d839d3
8214259: Implementation: JEP 189: Shenandoah: A Low-Pause-Time Garbage Collector (Experimental)
rkennke
parents:
diff
changeset
|
519 |
__ str(rscratch2, Address(tmp, 0)); |
9c18c9d839d3
8214259: Implementation: JEP 189: Shenandoah: A Low-Pause-Time Garbage Collector (Experimental)
rkennke
parents:
diff
changeset
|
520 |
__ b(done); |
9c18c9d839d3
8214259: Implementation: JEP 189: Shenandoah: A Low-Pause-Time Garbage Collector (Experimental)
rkennke
parents:
diff
changeset
|
521 |
|
9c18c9d839d3
8214259: Implementation: JEP 189: Shenandoah: A Low-Pause-Time Garbage Collector (Experimental)
rkennke
parents:
diff
changeset
|
522 |
__ bind(runtime); |
9c18c9d839d3
8214259: Implementation: JEP 189: Shenandoah: A Low-Pause-Time Garbage Collector (Experimental)
rkennke
parents:
diff
changeset
|
523 |
__ push_call_clobbered_registers(); |
9c18c9d839d3
8214259: Implementation: JEP 189: Shenandoah: A Low-Pause-Time Garbage Collector (Experimental)
rkennke
parents:
diff
changeset
|
524 |
__ load_parameter(0, pre_val); |
9c18c9d839d3
8214259: Implementation: JEP 189: Shenandoah: A Low-Pause-Time Garbage Collector (Experimental)
rkennke
parents:
diff
changeset
|
525 |
__ call_VM_leaf(CAST_FROM_FN_PTR(address, ShenandoahRuntime::write_ref_field_pre_entry), pre_val, thread); |
9c18c9d839d3
8214259: Implementation: JEP 189: Shenandoah: A Low-Pause-Time Garbage Collector (Experimental)
rkennke
parents:
diff
changeset
|
526 |
__ pop_call_clobbered_registers(); |
9c18c9d839d3
8214259: Implementation: JEP 189: Shenandoah: A Low-Pause-Time Garbage Collector (Experimental)
rkennke
parents:
diff
changeset
|
527 |
__ bind(done); |
9c18c9d839d3
8214259: Implementation: JEP 189: Shenandoah: A Low-Pause-Time Garbage Collector (Experimental)
rkennke
parents:
diff
changeset
|
528 |
|
9c18c9d839d3
8214259: Implementation: JEP 189: Shenandoah: A Low-Pause-Time Garbage Collector (Experimental)
rkennke
parents:
diff
changeset
|
529 |
__ epilogue(); |
9c18c9d839d3
8214259: Implementation: JEP 189: Shenandoah: A Low-Pause-Time Garbage Collector (Experimental)
rkennke
parents:
diff
changeset
|
530 |
} |
9c18c9d839d3
8214259: Implementation: JEP 189: Shenandoah: A Low-Pause-Time Garbage Collector (Experimental)
rkennke
parents:
diff
changeset
|
531 |
|
9c18c9d839d3
8214259: Implementation: JEP 189: Shenandoah: A Low-Pause-Time Garbage Collector (Experimental)
rkennke
parents:
diff
changeset
|
532 |
#undef __ |
9c18c9d839d3
8214259: Implementation: JEP 189: Shenandoah: A Low-Pause-Time Garbage Collector (Experimental)
rkennke
parents:
diff
changeset
|
533 |
|
9c18c9d839d3
8214259: Implementation: JEP 189: Shenandoah: A Low-Pause-Time Garbage Collector (Experimental)
rkennke
parents:
diff
changeset
|
534 |
#endif // COMPILER1 |
9c18c9d839d3
8214259: Implementation: JEP 189: Shenandoah: A Low-Pause-Time Garbage Collector (Experimental)
rkennke
parents:
diff
changeset
|
535 |
|
54423 | 536 |
address ShenandoahBarrierSetAssembler::shenandoah_lrb() { |
537 |
assert(_shenandoah_lrb != NULL, "need load reference barrier stub"); |
|
538 |
return _shenandoah_lrb; |
|
52925
9c18c9d839d3
8214259: Implementation: JEP 189: Shenandoah: A Low-Pause-Time Garbage Collector (Experimental)
rkennke
parents:
diff
changeset
|
539 |
} |
9c18c9d839d3
8214259: Implementation: JEP 189: Shenandoah: A Low-Pause-Time Garbage Collector (Experimental)
rkennke
parents:
diff
changeset
|
540 |
|
9c18c9d839d3
8214259: Implementation: JEP 189: Shenandoah: A Low-Pause-Time Garbage Collector (Experimental)
rkennke
parents:
diff
changeset
|
541 |
#define __ cgen->assembler()-> |
9c18c9d839d3
8214259: Implementation: JEP 189: Shenandoah: A Low-Pause-Time Garbage Collector (Experimental)
rkennke
parents:
diff
changeset
|
542 |
|
54423 | 543 |
// Shenandoah load reference barrier. |
52925
9c18c9d839d3
8214259: Implementation: JEP 189: Shenandoah: A Low-Pause-Time Garbage Collector (Experimental)
rkennke
parents:
diff
changeset
|
544 |
// |
9c18c9d839d3
8214259: Implementation: JEP 189: Shenandoah: A Low-Pause-Time Garbage Collector (Experimental)
rkennke
parents:
diff
changeset
|
545 |
// Input: |
9c18c9d839d3
8214259: Implementation: JEP 189: Shenandoah: A Low-Pause-Time Garbage Collector (Experimental)
rkennke
parents:
diff
changeset
|
546 |
// r0: OOP to evacuate. Not null. |
9c18c9d839d3
8214259: Implementation: JEP 189: Shenandoah: A Low-Pause-Time Garbage Collector (Experimental)
rkennke
parents:
diff
changeset
|
547 |
// |
9c18c9d839d3
8214259: Implementation: JEP 189: Shenandoah: A Low-Pause-Time Garbage Collector (Experimental)
rkennke
parents:
diff
changeset
|
548 |
// Output: |
9c18c9d839d3
8214259: Implementation: JEP 189: Shenandoah: A Low-Pause-Time Garbage Collector (Experimental)
rkennke
parents:
diff
changeset
|
549 |
// r0: Pointer to evacuated OOP. |
9c18c9d839d3
8214259: Implementation: JEP 189: Shenandoah: A Low-Pause-Time Garbage Collector (Experimental)
rkennke
parents:
diff
changeset
|
550 |
// |
9c18c9d839d3
8214259: Implementation: JEP 189: Shenandoah: A Low-Pause-Time Garbage Collector (Experimental)
rkennke
parents:
diff
changeset
|
551 |
// Trash rscratch1, rscratch2. Preserve everything else. |
54423 | 552 |
address ShenandoahBarrierSetAssembler::generate_shenandoah_lrb(StubCodeGenerator* cgen) { |
52925
9c18c9d839d3
8214259: Implementation: JEP 189: Shenandoah: A Low-Pause-Time Garbage Collector (Experimental)
rkennke
parents:
diff
changeset
|
553 |
|
9c18c9d839d3
8214259: Implementation: JEP 189: Shenandoah: A Low-Pause-Time Garbage Collector (Experimental)
rkennke
parents:
diff
changeset
|
554 |
__ align(6); |
54423 | 555 |
StubCodeMark mark(cgen, "StubRoutines", "shenandoah_lrb"); |
52925
9c18c9d839d3
8214259: Implementation: JEP 189: Shenandoah: A Low-Pause-Time Garbage Collector (Experimental)
rkennke
parents:
diff
changeset
|
556 |
address start = __ pc(); |
9c18c9d839d3
8214259: Implementation: JEP 189: Shenandoah: A Low-Pause-Time Garbage Collector (Experimental)
rkennke
parents:
diff
changeset
|
557 |
|
54423 | 558 |
Label work, done; |
52925
9c18c9d839d3
8214259: Implementation: JEP 189: Shenandoah: A Low-Pause-Time Garbage Collector (Experimental)
rkennke
parents:
diff
changeset
|
559 |
__ mov(rscratch2, ShenandoahHeap::in_cset_fast_test_addr()); |
9c18c9d839d3
8214259: Implementation: JEP 189: Shenandoah: A Low-Pause-Time Garbage Collector (Experimental)
rkennke
parents:
diff
changeset
|
560 |
__ lsr(rscratch1, r0, ShenandoahHeapRegion::region_size_bytes_shift_jint()); |
9c18c9d839d3
8214259: Implementation: JEP 189: Shenandoah: A Low-Pause-Time Garbage Collector (Experimental)
rkennke
parents:
diff
changeset
|
561 |
__ ldrb(rscratch2, Address(rscratch2, rscratch1)); |
9c18c9d839d3
8214259: Implementation: JEP 189: Shenandoah: A Low-Pause-Time Garbage Collector (Experimental)
rkennke
parents:
diff
changeset
|
562 |
__ tbnz(rscratch2, 0, work); |
9c18c9d839d3
8214259: Implementation: JEP 189: Shenandoah: A Low-Pause-Time Garbage Collector (Experimental)
rkennke
parents:
diff
changeset
|
563 |
__ ret(lr); |
9c18c9d839d3
8214259: Implementation: JEP 189: Shenandoah: A Low-Pause-Time Garbage Collector (Experimental)
rkennke
parents:
diff
changeset
|
564 |
__ bind(work); |
9c18c9d839d3
8214259: Implementation: JEP 189: Shenandoah: A Low-Pause-Time Garbage Collector (Experimental)
rkennke
parents:
diff
changeset
|
565 |
|
54423 | 566 |
__ mov(rscratch2, r0); |
55076
785a12e0f89b
8224584: Shenandoah: Eliminate forwarding pointer word
rkennke
parents:
54979
diff
changeset
|
567 |
resolve_forward_pointer_not_null(cgen->assembler(), r0, rscratch1); |
54423 | 568 |
__ cmp(rscratch2, r0); |
569 |
__ br(Assembler::NE, done); |
|
52925
9c18c9d839d3
8214259: Implementation: JEP 189: Shenandoah: A Low-Pause-Time Garbage Collector (Experimental)
rkennke
parents:
diff
changeset
|
570 |
|
9c18c9d839d3
8214259: Implementation: JEP 189: Shenandoah: A Low-Pause-Time Garbage Collector (Experimental)
rkennke
parents:
diff
changeset
|
571 |
__ enter(); // required for proper stackwalking of RuntimeStub frame |
9c18c9d839d3
8214259: Implementation: JEP 189: Shenandoah: A Low-Pause-Time Garbage Collector (Experimental)
rkennke
parents:
diff
changeset
|
572 |
|
9c18c9d839d3
8214259: Implementation: JEP 189: Shenandoah: A Low-Pause-Time Garbage Collector (Experimental)
rkennke
parents:
diff
changeset
|
573 |
__ push_call_clobbered_registers(); |
9c18c9d839d3
8214259: Implementation: JEP 189: Shenandoah: A Low-Pause-Time Garbage Collector (Experimental)
rkennke
parents:
diff
changeset
|
574 |
|
55679
aa96c53c592b
8227676: Shenandoah: More consistent naming of LRB entry points
rkennke
parents:
55574
diff
changeset
|
575 |
__ mov(lr, CAST_FROM_FN_PTR(address, ShenandoahRuntime::load_reference_barrier)); |
52925
9c18c9d839d3
8214259: Implementation: JEP 189: Shenandoah: A Low-Pause-Time Garbage Collector (Experimental)
rkennke
parents:
diff
changeset
|
576 |
__ blrt(lr, 1, 0, MacroAssembler::ret_type_integral); |
54423 | 577 |
__ mov(rscratch1, r0); |
52925
9c18c9d839d3
8214259: Implementation: JEP 189: Shenandoah: A Low-Pause-Time Garbage Collector (Experimental)
rkennke
parents:
diff
changeset
|
578 |
__ pop_call_clobbered_registers(); |
54423 | 579 |
__ mov(r0, rscratch1); |
52925
9c18c9d839d3
8214259: Implementation: JEP 189: Shenandoah: A Low-Pause-Time Garbage Collector (Experimental)
rkennke
parents:
diff
changeset
|
580 |
|
9c18c9d839d3
8214259: Implementation: JEP 189: Shenandoah: A Low-Pause-Time Garbage Collector (Experimental)
rkennke
parents:
diff
changeset
|
581 |
__ leave(); // required for proper stackwalking of RuntimeStub frame |
54423 | 582 |
__ bind(done); |
52925
9c18c9d839d3
8214259: Implementation: JEP 189: Shenandoah: A Low-Pause-Time Garbage Collector (Experimental)
rkennke
parents:
diff
changeset
|
583 |
__ ret(lr); |
9c18c9d839d3
8214259: Implementation: JEP 189: Shenandoah: A Low-Pause-Time Garbage Collector (Experimental)
rkennke
parents:
diff
changeset
|
584 |
|
9c18c9d839d3
8214259: Implementation: JEP 189: Shenandoah: A Low-Pause-Time Garbage Collector (Experimental)
rkennke
parents:
diff
changeset
|
585 |
return start; |
9c18c9d839d3
8214259: Implementation: JEP 189: Shenandoah: A Low-Pause-Time Garbage Collector (Experimental)
rkennke
parents:
diff
changeset
|
586 |
} |
9c18c9d839d3
8214259: Implementation: JEP 189: Shenandoah: A Low-Pause-Time Garbage Collector (Experimental)
rkennke
parents:
diff
changeset
|
587 |
|
9c18c9d839d3
8214259: Implementation: JEP 189: Shenandoah: A Low-Pause-Time Garbage Collector (Experimental)
rkennke
parents:
diff
changeset
|
588 |
#undef __ |
9c18c9d839d3
8214259: Implementation: JEP 189: Shenandoah: A Low-Pause-Time Garbage Collector (Experimental)
rkennke
parents:
diff
changeset
|
589 |
|
9c18c9d839d3
8214259: Implementation: JEP 189: Shenandoah: A Low-Pause-Time Garbage Collector (Experimental)
rkennke
parents:
diff
changeset
|
590 |
void ShenandoahBarrierSetAssembler::barrier_stubs_init() { |
54423 | 591 |
if (ShenandoahLoadRefBarrier) { |
52925
9c18c9d839d3
8214259: Implementation: JEP 189: Shenandoah: A Low-Pause-Time Garbage Collector (Experimental)
rkennke
parents:
diff
changeset
|
592 |
int stub_code_size = 2048; |
9c18c9d839d3
8214259: Implementation: JEP 189: Shenandoah: A Low-Pause-Time Garbage Collector (Experimental)
rkennke
parents:
diff
changeset
|
593 |
ResourceMark rm; |
9c18c9d839d3
8214259: Implementation: JEP 189: Shenandoah: A Low-Pause-Time Garbage Collector (Experimental)
rkennke
parents:
diff
changeset
|
594 |
BufferBlob* bb = BufferBlob::create("shenandoah_barrier_stubs", stub_code_size); |
9c18c9d839d3
8214259: Implementation: JEP 189: Shenandoah: A Low-Pause-Time Garbage Collector (Experimental)
rkennke
parents:
diff
changeset
|
595 |
CodeBuffer buf(bb); |
9c18c9d839d3
8214259: Implementation: JEP 189: Shenandoah: A Low-Pause-Time Garbage Collector (Experimental)
rkennke
parents:
diff
changeset
|
596 |
StubCodeGenerator cgen(&buf); |
54423 | 597 |
_shenandoah_lrb = generate_shenandoah_lrb(&cgen); |
52925
9c18c9d839d3
8214259: Implementation: JEP 189: Shenandoah: A Low-Pause-Time Garbage Collector (Experimental)
rkennke
parents:
diff
changeset
|
598 |
} |
9c18c9d839d3
8214259: Implementation: JEP 189: Shenandoah: A Low-Pause-Time Garbage Collector (Experimental)
rkennke
parents:
diff
changeset
|
599 |
} |