graal-compiler: src/share/vm/runtime/sweeper.cpp annotate

annotate src/share/vm/runtime/sweeper.cpp @ 6197:d2a62e0f25eb

6995781: Native Memory Tracking (Phase 1) 7151532: DCmd for hotspot native memory tracking Summary: Implementation of native memory tracking phase 1, which tracks VM native memory usage, and related DCmd Reviewed-by: acorn, coleenp, fparain

author	zgu
date	Thu, 28 Jun 2012 17:03:16 -0400
parents	cfdfbeac0a5b
children	957c266d8bc5 da91efe96a93

rev	line source
0 a61af66fc99e Initial load duke parents: diff changeset	1 /*
2426 1d1603768966 7010070: Update all 2010 Oracle-changed OpenJDK files to have the proper copyright dates - second pass trims parents: 2353 diff changeset	2 * Copyright (c) 1997, 2011, Oracle and/or its affiliates. All rights reserved.
0 a61af66fc99e Initial load duke parents: diff changeset	3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
a61af66fc99e Initial load duke parents: diff changeset	4 *
a61af66fc99e Initial load duke parents: diff changeset	5 * This code is free software; you can redistribute it and/or modify it
a61af66fc99e Initial load duke parents: diff changeset	6 * under the terms of the GNU General Public License version 2 only, as
a61af66fc99e Initial load duke parents: diff changeset	7 * published by the Free Software Foundation.
a61af66fc99e Initial load duke parents: diff changeset	8 *
a61af66fc99e Initial load duke parents: diff changeset	9 * This code is distributed in the hope that it will be useful, but WITHOUT
a61af66fc99e Initial load duke parents: diff changeset	10 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
a61af66fc99e Initial load duke parents: diff changeset	11 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
a61af66fc99e Initial load duke parents: diff changeset	12 * version 2 for more details (a copy is included in the LICENSE file that
a61af66fc99e Initial load duke parents: diff changeset	13 * accompanied this code).
a61af66fc99e Initial load duke parents: diff changeset	14 *
a61af66fc99e Initial load duke parents: diff changeset	15 * You should have received a copy of the GNU General Public License version
a61af66fc99e Initial load duke parents: diff changeset	16 * 2 along with this work; if not, write to the Free Software Foundation,
a61af66fc99e Initial load duke parents: diff changeset	17 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
a61af66fc99e Initial load duke parents: diff changeset	18 *
1552 c18cbe5936b8 6941466: Oracle rebranding changes for Hotspot repositories trims parents: 1538 diff changeset	19 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
c18cbe5936b8 6941466: Oracle rebranding changes for Hotspot repositories trims parents: 1538 diff changeset	20 * or visit www.oracle.com if you need additional information or have any
c18cbe5936b8 6941466: Oracle rebranding changes for Hotspot repositories trims parents: 1538 diff changeset	21 * questions.
0 a61af66fc99e Initial load duke parents: diff changeset	22 *
a61af66fc99e Initial load duke parents: diff changeset	23 */
a61af66fc99e Initial load duke parents: diff changeset	24
1972 f95d63e2154a 6989984: Use standard include model for Hospot stefank parents: 1783 diff changeset	25 #include "precompiled.hpp"
f95d63e2154a 6989984: Use standard include model for Hospot stefank parents: 1783 diff changeset	26 #include "code/codeCache.hpp"
f95d63e2154a 6989984: Use standard include model for Hospot stefank parents: 1783 diff changeset	27 #include "code/nmethod.hpp"
f95d63e2154a 6989984: Use standard include model for Hospot stefank parents: 1783 diff changeset	28 #include "compiler/compileBroker.hpp"
f95d63e2154a 6989984: Use standard include model for Hospot stefank parents: 1783 diff changeset	29 #include "memory/resourceArea.hpp"
f95d63e2154a 6989984: Use standard include model for Hospot stefank parents: 1783 diff changeset	30 #include "oops/methodOop.hpp"
f95d63e2154a 6989984: Use standard include model for Hospot stefank parents: 1783 diff changeset	31 #include "runtime/atomic.hpp"
f95d63e2154a 6989984: Use standard include model for Hospot stefank parents: 1783 diff changeset	32 #include "runtime/compilationPolicy.hpp"
f95d63e2154a 6989984: Use standard include model for Hospot stefank parents: 1783 diff changeset	33 #include "runtime/mutexLocker.hpp"
f95d63e2154a 6989984: Use standard include model for Hospot stefank parents: 1783 diff changeset	34 #include "runtime/os.hpp"
f95d63e2154a 6989984: Use standard include model for Hospot stefank parents: 1783 diff changeset	35 #include "runtime/sweeper.hpp"
f95d63e2154a 6989984: Use standard include model for Hospot stefank parents: 1783 diff changeset	36 #include "runtime/vm_operations.hpp"
f95d63e2154a 6989984: Use standard include model for Hospot stefank parents: 1783 diff changeset	37 #include "utilities/events.hpp"
f95d63e2154a 6989984: Use standard include model for Hospot stefank parents: 1783 diff changeset	38 #include "utilities/xmlstream.hpp"
0 a61af66fc99e Initial load duke parents: diff changeset	39
3384 f52ed367b66d 6996747: SIGSEGV in nmethod::cleanup_inline_caches / CompiledIC::verify never parents: 2482 diff changeset	40 #ifdef ASSERT
f52ed367b66d 6996747: SIGSEGV in nmethod::cleanup_inline_caches / CompiledIC::verify never parents: 2482 diff changeset	41
f52ed367b66d 6996747: SIGSEGV in nmethod::cleanup_inline_caches / CompiledIC::verify never parents: 2482 diff changeset	42 #define SWEEP(nm) record_sweep(nm, __LINE__)
f52ed367b66d 6996747: SIGSEGV in nmethod::cleanup_inline_caches / CompiledIC::verify never parents: 2482 diff changeset	43 // Sweeper logging code
f52ed367b66d 6996747: SIGSEGV in nmethod::cleanup_inline_caches / CompiledIC::verify never parents: 2482 diff changeset	44 class SweeperRecord {
f52ed367b66d 6996747: SIGSEGV in nmethod::cleanup_inline_caches / CompiledIC::verify never parents: 2482 diff changeset	45 public:
f52ed367b66d 6996747: SIGSEGV in nmethod::cleanup_inline_caches / CompiledIC::verify never parents: 2482 diff changeset	46 int traversal;
f52ed367b66d 6996747: SIGSEGV in nmethod::cleanup_inline_caches / CompiledIC::verify never parents: 2482 diff changeset	47 int invocation;
f52ed367b66d 6996747: SIGSEGV in nmethod::cleanup_inline_caches / CompiledIC::verify never parents: 2482 diff changeset	48 int compile_id;
f52ed367b66d 6996747: SIGSEGV in nmethod::cleanup_inline_caches / CompiledIC::verify never parents: 2482 diff changeset	49 long traversal_mark;
f52ed367b66d 6996747: SIGSEGV in nmethod::cleanup_inline_caches / CompiledIC::verify never parents: 2482 diff changeset	50 int state;
f52ed367b66d 6996747: SIGSEGV in nmethod::cleanup_inline_caches / CompiledIC::verify never parents: 2482 diff changeset	51 const char* kind;
f52ed367b66d 6996747: SIGSEGV in nmethod::cleanup_inline_caches / CompiledIC::verify never parents: 2482 diff changeset	52 address vep;
f52ed367b66d 6996747: SIGSEGV in nmethod::cleanup_inline_caches / CompiledIC::verify never parents: 2482 diff changeset	53 address uep;
f52ed367b66d 6996747: SIGSEGV in nmethod::cleanup_inline_caches / CompiledIC::verify never parents: 2482 diff changeset	54 int line;
f52ed367b66d 6996747: SIGSEGV in nmethod::cleanup_inline_caches / CompiledIC::verify never parents: 2482 diff changeset	55
f52ed367b66d 6996747: SIGSEGV in nmethod::cleanup_inline_caches / CompiledIC::verify never parents: 2482 diff changeset	56 void print() {
f52ed367b66d 6996747: SIGSEGV in nmethod::cleanup_inline_caches / CompiledIC::verify never parents: 2482 diff changeset	57 tty->print_cr("traversal = %d invocation = %d compile_id = %d %s uep = " PTR_FORMAT " vep = "
f52ed367b66d 6996747: SIGSEGV in nmethod::cleanup_inline_caches / CompiledIC::verify never parents: 2482 diff changeset	58 PTR_FORMAT " state = %d traversal_mark %d line = %d",
f52ed367b66d 6996747: SIGSEGV in nmethod::cleanup_inline_caches / CompiledIC::verify never parents: 2482 diff changeset	59 traversal,
f52ed367b66d 6996747: SIGSEGV in nmethod::cleanup_inline_caches / CompiledIC::verify never parents: 2482 diff changeset	60 invocation,
f52ed367b66d 6996747: SIGSEGV in nmethod::cleanup_inline_caches / CompiledIC::verify never parents: 2482 diff changeset	61 compile_id,
f52ed367b66d 6996747: SIGSEGV in nmethod::cleanup_inline_caches / CompiledIC::verify never parents: 2482 diff changeset	62 kind == NULL ? "" : kind,
f52ed367b66d 6996747: SIGSEGV in nmethod::cleanup_inline_caches / CompiledIC::verify never parents: 2482 diff changeset	63 uep,
f52ed367b66d 6996747: SIGSEGV in nmethod::cleanup_inline_caches / CompiledIC::verify never parents: 2482 diff changeset	64 vep,
f52ed367b66d 6996747: SIGSEGV in nmethod::cleanup_inline_caches / CompiledIC::verify never parents: 2482 diff changeset	65 state,
f52ed367b66d 6996747: SIGSEGV in nmethod::cleanup_inline_caches / CompiledIC::verify never parents: 2482 diff changeset	66 traversal_mark,
f52ed367b66d 6996747: SIGSEGV in nmethod::cleanup_inline_caches / CompiledIC::verify never parents: 2482 diff changeset	67 line);
f52ed367b66d 6996747: SIGSEGV in nmethod::cleanup_inline_caches / CompiledIC::verify never parents: 2482 diff changeset	68 }
f52ed367b66d 6996747: SIGSEGV in nmethod::cleanup_inline_caches / CompiledIC::verify never parents: 2482 diff changeset	69 };
f52ed367b66d 6996747: SIGSEGV in nmethod::cleanup_inline_caches / CompiledIC::verify never parents: 2482 diff changeset	70
f52ed367b66d 6996747: SIGSEGV in nmethod::cleanup_inline_caches / CompiledIC::verify never parents: 2482 diff changeset	71 static int _sweep_index = 0;
f52ed367b66d 6996747: SIGSEGV in nmethod::cleanup_inline_caches / CompiledIC::verify never parents: 2482 diff changeset	72 static SweeperRecord* _records = NULL;
f52ed367b66d 6996747: SIGSEGV in nmethod::cleanup_inline_caches / CompiledIC::verify never parents: 2482 diff changeset	73
f52ed367b66d 6996747: SIGSEGV in nmethod::cleanup_inline_caches / CompiledIC::verify never parents: 2482 diff changeset	74 void NMethodSweeper::report_events(int id, address entry) {
f52ed367b66d 6996747: SIGSEGV in nmethod::cleanup_inline_caches / CompiledIC::verify never parents: 2482 diff changeset	75 if (_records != NULL) {
f52ed367b66d 6996747: SIGSEGV in nmethod::cleanup_inline_caches / CompiledIC::verify never parents: 2482 diff changeset	76 for (int i = _sweep_index; i < SweeperLogEntries; i++) {
f52ed367b66d 6996747: SIGSEGV in nmethod::cleanup_inline_caches / CompiledIC::verify never parents: 2482 diff changeset	77 if (_records[i].uep == entry \|\|
f52ed367b66d 6996747: SIGSEGV in nmethod::cleanup_inline_caches / CompiledIC::verify never parents: 2482 diff changeset	78 _records[i].vep == entry \|\|
f52ed367b66d 6996747: SIGSEGV in nmethod::cleanup_inline_caches / CompiledIC::verify never parents: 2482 diff changeset	79 _records[i].compile_id == id) {
f52ed367b66d 6996747: SIGSEGV in nmethod::cleanup_inline_caches / CompiledIC::verify never parents: 2482 diff changeset	80 _records[i].print();
f52ed367b66d 6996747: SIGSEGV in nmethod::cleanup_inline_caches / CompiledIC::verify never parents: 2482 diff changeset	81 }
f52ed367b66d 6996747: SIGSEGV in nmethod::cleanup_inline_caches / CompiledIC::verify never parents: 2482 diff changeset	82 }
f52ed367b66d 6996747: SIGSEGV in nmethod::cleanup_inline_caches / CompiledIC::verify never parents: 2482 diff changeset	83 for (int i = 0; i < _sweep_index; i++) {
f52ed367b66d 6996747: SIGSEGV in nmethod::cleanup_inline_caches / CompiledIC::verify never parents: 2482 diff changeset	84 if (_records[i].uep == entry \|\|
f52ed367b66d 6996747: SIGSEGV in nmethod::cleanup_inline_caches / CompiledIC::verify never parents: 2482 diff changeset	85 _records[i].vep == entry \|\|
f52ed367b66d 6996747: SIGSEGV in nmethod::cleanup_inline_caches / CompiledIC::verify never parents: 2482 diff changeset	86 _records[i].compile_id == id) {
f52ed367b66d 6996747: SIGSEGV in nmethod::cleanup_inline_caches / CompiledIC::verify never parents: 2482 diff changeset	87 _records[i].print();
f52ed367b66d 6996747: SIGSEGV in nmethod::cleanup_inline_caches / CompiledIC::verify never parents: 2482 diff changeset	88 }
f52ed367b66d 6996747: SIGSEGV in nmethod::cleanup_inline_caches / CompiledIC::verify never parents: 2482 diff changeset	89 }
f52ed367b66d 6996747: SIGSEGV in nmethod::cleanup_inline_caches / CompiledIC::verify never parents: 2482 diff changeset	90 }
f52ed367b66d 6996747: SIGSEGV in nmethod::cleanup_inline_caches / CompiledIC::verify never parents: 2482 diff changeset	91 }
f52ed367b66d 6996747: SIGSEGV in nmethod::cleanup_inline_caches / CompiledIC::verify never parents: 2482 diff changeset	92
f52ed367b66d 6996747: SIGSEGV in nmethod::cleanup_inline_caches / CompiledIC::verify never parents: 2482 diff changeset	93 void NMethodSweeper::report_events() {
f52ed367b66d 6996747: SIGSEGV in nmethod::cleanup_inline_caches / CompiledIC::verify never parents: 2482 diff changeset	94 if (_records != NULL) {
f52ed367b66d 6996747: SIGSEGV in nmethod::cleanup_inline_caches / CompiledIC::verify never parents: 2482 diff changeset	95 for (int i = _sweep_index; i < SweeperLogEntries; i++) {
f52ed367b66d 6996747: SIGSEGV in nmethod::cleanup_inline_caches / CompiledIC::verify never parents: 2482 diff changeset	96 // skip empty records
f52ed367b66d 6996747: SIGSEGV in nmethod::cleanup_inline_caches / CompiledIC::verify never parents: 2482 diff changeset	97 if (_records[i].vep == NULL) continue;
f52ed367b66d 6996747: SIGSEGV in nmethod::cleanup_inline_caches / CompiledIC::verify never parents: 2482 diff changeset	98 _records[i].print();
f52ed367b66d 6996747: SIGSEGV in nmethod::cleanup_inline_caches / CompiledIC::verify never parents: 2482 diff changeset	99 }
f52ed367b66d 6996747: SIGSEGV in nmethod::cleanup_inline_caches / CompiledIC::verify never parents: 2482 diff changeset	100 for (int i = 0; i < _sweep_index; i++) {
f52ed367b66d 6996747: SIGSEGV in nmethod::cleanup_inline_caches / CompiledIC::verify never parents: 2482 diff changeset	101 // skip empty records
f52ed367b66d 6996747: SIGSEGV in nmethod::cleanup_inline_caches / CompiledIC::verify never parents: 2482 diff changeset	102 if (_records[i].vep == NULL) continue;
f52ed367b66d 6996747: SIGSEGV in nmethod::cleanup_inline_caches / CompiledIC::verify never parents: 2482 diff changeset	103 _records[i].print();
f52ed367b66d 6996747: SIGSEGV in nmethod::cleanup_inline_caches / CompiledIC::verify never parents: 2482 diff changeset	104 }
f52ed367b66d 6996747: SIGSEGV in nmethod::cleanup_inline_caches / CompiledIC::verify never parents: 2482 diff changeset	105 }
f52ed367b66d 6996747: SIGSEGV in nmethod::cleanup_inline_caches / CompiledIC::verify never parents: 2482 diff changeset	106 }
f52ed367b66d 6996747: SIGSEGV in nmethod::cleanup_inline_caches / CompiledIC::verify never parents: 2482 diff changeset	107
f52ed367b66d 6996747: SIGSEGV in nmethod::cleanup_inline_caches / CompiledIC::verify never parents: 2482 diff changeset	108 void NMethodSweeper::record_sweep(nmethod* nm, int line) {
f52ed367b66d 6996747: SIGSEGV in nmethod::cleanup_inline_caches / CompiledIC::verify never parents: 2482 diff changeset	109 if (_records != NULL) {
f52ed367b66d 6996747: SIGSEGV in nmethod::cleanup_inline_caches / CompiledIC::verify never parents: 2482 diff changeset	110 _records[_sweep_index].traversal = _traversals;
f52ed367b66d 6996747: SIGSEGV in nmethod::cleanup_inline_caches / CompiledIC::verify never parents: 2482 diff changeset	111 _records[_sweep_index].traversal_mark = nm->_stack_traversal_mark;
f52ed367b66d 6996747: SIGSEGV in nmethod::cleanup_inline_caches / CompiledIC::verify never parents: 2482 diff changeset	112 _records[_sweep_index].invocation = _invocations;
f52ed367b66d 6996747: SIGSEGV in nmethod::cleanup_inline_caches / CompiledIC::verify never parents: 2482 diff changeset	113 _records[_sweep_index].compile_id = nm->compile_id();
f52ed367b66d 6996747: SIGSEGV in nmethod::cleanup_inline_caches / CompiledIC::verify never parents: 2482 diff changeset	114 _records[_sweep_index].kind = nm->compile_kind();
f52ed367b66d 6996747: SIGSEGV in nmethod::cleanup_inline_caches / CompiledIC::verify never parents: 2482 diff changeset	115 _records[_sweep_index].state = nm->_state;
f52ed367b66d 6996747: SIGSEGV in nmethod::cleanup_inline_caches / CompiledIC::verify never parents: 2482 diff changeset	116 _records[_sweep_index].vep = nm->verified_entry_point();
f52ed367b66d 6996747: SIGSEGV in nmethod::cleanup_inline_caches / CompiledIC::verify never parents: 2482 diff changeset	117 _records[_sweep_index].uep = nm->entry_point();
f52ed367b66d 6996747: SIGSEGV in nmethod::cleanup_inline_caches / CompiledIC::verify never parents: 2482 diff changeset	118 _records[_sweep_index].line = line;
f52ed367b66d 6996747: SIGSEGV in nmethod::cleanup_inline_caches / CompiledIC::verify never parents: 2482 diff changeset	119
f52ed367b66d 6996747: SIGSEGV in nmethod::cleanup_inline_caches / CompiledIC::verify never parents: 2482 diff changeset	120 _sweep_index = (_sweep_index + 1) % SweeperLogEntries;
f52ed367b66d 6996747: SIGSEGV in nmethod::cleanup_inline_caches / CompiledIC::verify never parents: 2482 diff changeset	121 }
f52ed367b66d 6996747: SIGSEGV in nmethod::cleanup_inline_caches / CompiledIC::verify never parents: 2482 diff changeset	122 }
f52ed367b66d 6996747: SIGSEGV in nmethod::cleanup_inline_caches / CompiledIC::verify never parents: 2482 diff changeset	123 #else
f52ed367b66d 6996747: SIGSEGV in nmethod::cleanup_inline_caches / CompiledIC::verify never parents: 2482 diff changeset	124 #define SWEEP(nm)
f52ed367b66d 6996747: SIGSEGV in nmethod::cleanup_inline_caches / CompiledIC::verify never parents: 2482 diff changeset	125 #endif
f52ed367b66d 6996747: SIGSEGV in nmethod::cleanup_inline_caches / CompiledIC::verify never parents: 2482 diff changeset	126
f52ed367b66d 6996747: SIGSEGV in nmethod::cleanup_inline_caches / CompiledIC::verify never parents: 2482 diff changeset	127
0 a61af66fc99e Initial load duke parents: diff changeset	128 long NMethodSweeper::_traversals = 0; // No. of stack traversals performed
1615 ff38d05ea86f 6956958: assert(is_clean() \|\| is_call_to_compiled() \|\| is_call_to_interpreted() \|\| is_optimized() \|\| is_megam never parents: 1552 diff changeset	129 nmethod* NMethodSweeper::_current = NULL; // Current nmethod
1644 2a47bd84841f 6965184: possible races in make_not_entrant_or_zombie never parents: 1615 diff changeset	130 int NMethodSweeper::_seen = 0 ; // No. of nmethods we have currently processed in current pass of CodeCache
2a47bd84841f 6965184: possible races in make_not_entrant_or_zombie never parents: 1615 diff changeset	131
2a47bd84841f 6965184: possible races in make_not_entrant_or_zombie never parents: 1615 diff changeset	132 volatile int NMethodSweeper::_invocations = 0; // No. of invocations left until we are completed with this pass
2a47bd84841f 6965184: possible races in make_not_entrant_or_zombie never parents: 1615 diff changeset	133 volatile int NMethodSweeper::_sweep_started = 0; // Whether a sweep is in progress.
0 a61af66fc99e Initial load duke parents: diff changeset	134
a61af66fc99e Initial load duke parents: diff changeset	135 jint NMethodSweeper::_locked_seen = 0;
a61af66fc99e Initial load duke parents: diff changeset	136 jint NMethodSweeper::_not_entrant_seen_on_stack = 0;
a61af66fc99e Initial load duke parents: diff changeset	137 bool NMethodSweeper::_rescan = false;
1538 bfe29ec02863 6950075: nmethod sweeper should operate concurrently never parents: 1202 diff changeset	138 bool NMethodSweeper::_do_sweep = false;
1202 5f24d0319e54 4360113: Evict nmethods when code cache gets full kvn parents: 1000 diff changeset	139 bool NMethodSweeper::_was_full = false;
5f24d0319e54 4360113: Evict nmethods when code cache gets full kvn parents: 1000 diff changeset	140 jint NMethodSweeper::_advise_to_sweep = 0;
5f24d0319e54 4360113: Evict nmethods when code cache gets full kvn parents: 1000 diff changeset	141 jlong NMethodSweeper::_last_was_full = 0;
5f24d0319e54 4360113: Evict nmethods when code cache gets full kvn parents: 1000 diff changeset	142 uint NMethodSweeper::_highest_marked = 0;
5f24d0319e54 4360113: Evict nmethods when code cache gets full kvn parents: 1000 diff changeset	143 long NMethodSweeper::_was_full_traversal = 0;
0 a61af66fc99e Initial load duke parents: diff changeset	144
989 148e5441d916 6863023: need non-perm oops in code cache for JSR 292 jrose parents: 0 diff changeset	145 class MarkActivationClosure: public CodeBlobClosure {
148e5441d916 6863023: need non-perm oops in code cache for JSR 292 jrose parents: 0 diff changeset	146 public:
148e5441d916 6863023: need non-perm oops in code cache for JSR 292 jrose parents: 0 diff changeset	147 virtual void do_code_blob(CodeBlob* cb) {
148e5441d916 6863023: need non-perm oops in code cache for JSR 292 jrose parents: 0 diff changeset	148 // If we see an activation belonging to a non_entrant nmethod, we mark it.
148e5441d916 6863023: need non-perm oops in code cache for JSR 292 jrose parents: 0 diff changeset	149 if (cb->is_nmethod() && ((nmethod*)cb)->is_not_entrant()) {
148e5441d916 6863023: need non-perm oops in code cache for JSR 292 jrose parents: 0 diff changeset	150 ((nmethod*)cb)->mark_as_seen_on_stack();
148e5441d916 6863023: need non-perm oops in code cache for JSR 292 jrose parents: 0 diff changeset	151 }
148e5441d916 6863023: need non-perm oops in code cache for JSR 292 jrose parents: 0 diff changeset	152 }
148e5441d916 6863023: need non-perm oops in code cache for JSR 292 jrose parents: 0 diff changeset	153 };
148e5441d916 6863023: need non-perm oops in code cache for JSR 292 jrose parents: 0 diff changeset	154 static MarkActivationClosure mark_activation_closure;
148e5441d916 6863023: need non-perm oops in code cache for JSR 292 jrose parents: 0 diff changeset	155
1538 bfe29ec02863 6950075: nmethod sweeper should operate concurrently never parents: 1202 diff changeset	156 void NMethodSweeper::scan_stacks() {
0 a61af66fc99e Initial load duke parents: diff changeset	157 assert(SafepointSynchronize::is_at_safepoint(), "must be executed at a safepoint");
a61af66fc99e Initial load duke parents: diff changeset	158 if (!MethodFlushing) return;
1538 bfe29ec02863 6950075: nmethod sweeper should operate concurrently never parents: 1202 diff changeset	159 _do_sweep = true;
0 a61af66fc99e Initial load duke parents: diff changeset	160
a61af66fc99e Initial load duke parents: diff changeset	161 // No need to synchronize access, since this is always executed at a
a61af66fc99e Initial load duke parents: diff changeset	162 // safepoint. If we aren't in the middle of scan and a rescan
1538 bfe29ec02863 6950075: nmethod sweeper should operate concurrently never parents: 1202 diff changeset	163 // hasn't been requested then just return. If UseCodeCacheFlushing is on and
bfe29ec02863 6950075: nmethod sweeper should operate concurrently never parents: 1202 diff changeset	164 // code cache flushing is in progress, don't skip sweeping to help make progress
bfe29ec02863 6950075: nmethod sweeper should operate concurrently never parents: 1202 diff changeset	165 // clearing space in the code cache.
bfe29ec02863 6950075: nmethod sweeper should operate concurrently never parents: 1202 diff changeset	166 if ((_current == NULL && !_rescan) && !(UseCodeCacheFlushing && !CompileBroker::should_compile_new_jobs())) {
bfe29ec02863 6950075: nmethod sweeper should operate concurrently never parents: 1202 diff changeset	167 _do_sweep = false;
bfe29ec02863 6950075: nmethod sweeper should operate concurrently never parents: 1202 diff changeset	168 return;
bfe29ec02863 6950075: nmethod sweeper should operate concurrently never parents: 1202 diff changeset	169 }
0 a61af66fc99e Initial load duke parents: diff changeset	170
a61af66fc99e Initial load duke parents: diff changeset	171 // Make sure CompiledIC_lock in unlocked, since we might update some
a61af66fc99e Initial load duke parents: diff changeset	172 // inline caches. If it is, we just bail-out and try later.
a61af66fc99e Initial load duke parents: diff changeset	173 if (CompiledIC_lock->is_locked() \|\| Patching_lock->is_locked()) return;
a61af66fc99e Initial load duke parents: diff changeset	174
a61af66fc99e Initial load duke parents: diff changeset	175 // Check for restart
a61af66fc99e Initial load duke parents: diff changeset	176 assert(CodeCache::find_blob_unsafe(_current) == _current, "Sweeper nmethod cached state invalid");
a61af66fc99e Initial load duke parents: diff changeset	177 if (_current == NULL) {
a61af66fc99e Initial load duke parents: diff changeset	178 _seen = 0;
a61af66fc99e Initial load duke parents: diff changeset	179 _invocations = NmethodSweepFraction;
1538 bfe29ec02863 6950075: nmethod sweeper should operate concurrently never parents: 1202 diff changeset	180 _current = CodeCache::first_nmethod();
0 a61af66fc99e Initial load duke parents: diff changeset	181 _traversals += 1;
a61af66fc99e Initial load duke parents: diff changeset	182 if (PrintMethodFlushing) {
a61af66fc99e Initial load duke parents: diff changeset	183 tty->print_cr("### Sweep: stack traversal %d", _traversals);
a61af66fc99e Initial load duke parents: diff changeset	184 }
989 148e5441d916 6863023: need non-perm oops in code cache for JSR 292 jrose parents: 0 diff changeset	185 Threads::nmethods_do(&mark_activation_closure);
0 a61af66fc99e Initial load duke parents: diff changeset	186
a61af66fc99e Initial load duke parents: diff changeset	187 // reset the flags since we started a scan from the beginning.
a61af66fc99e Initial load duke parents: diff changeset	188 _rescan = false;
a61af66fc99e Initial load duke parents: diff changeset	189 _locked_seen = 0;
a61af66fc99e Initial load duke parents: diff changeset	190 _not_entrant_seen_on_stack = 0;
a61af66fc99e Initial load duke parents: diff changeset	191 }
a61af66fc99e Initial load duke parents: diff changeset	192
1202 5f24d0319e54 4360113: Evict nmethods when code cache gets full kvn parents: 1000 diff changeset	193 if (UseCodeCacheFlushing) {
5f24d0319e54 4360113: Evict nmethods when code cache gets full kvn parents: 1000 diff changeset	194 if (!CodeCache::needs_flushing()) {
1538 bfe29ec02863 6950075: nmethod sweeper should operate concurrently never parents: 1202 diff changeset	195 // scan_stacks() runs during a safepoint, no race with setters
1202 5f24d0319e54 4360113: Evict nmethods when code cache gets full kvn parents: 1000 diff changeset	196 _advise_to_sweep = 0;
5f24d0319e54 4360113: Evict nmethods when code cache gets full kvn parents: 1000 diff changeset	197 }
5f24d0319e54 4360113: Evict nmethods when code cache gets full kvn parents: 1000 diff changeset	198
5f24d0319e54 4360113: Evict nmethods when code cache gets full kvn parents: 1000 diff changeset	199 if (was_full()) {
5f24d0319e54 4360113: Evict nmethods when code cache gets full kvn parents: 1000 diff changeset	200 // There was some progress so attempt to restart the compiler
5f24d0319e54 4360113: Evict nmethods when code cache gets full kvn parents: 1000 diff changeset	201 jlong now = os::javaTimeMillis();
5f24d0319e54 4360113: Evict nmethods when code cache gets full kvn parents: 1000 diff changeset	202 jlong max_interval = (jlong)MinCodeCacheFlushingInterval * (jlong)1000;
5f24d0319e54 4360113: Evict nmethods when code cache gets full kvn parents: 1000 diff changeset	203 jlong curr_interval = now - _last_was_full;
5f24d0319e54 4360113: Evict nmethods when code cache gets full kvn parents: 1000 diff changeset	204 if ((!CodeCache::needs_flushing()) && (curr_interval > max_interval)) {
5f24d0319e54 4360113: Evict nmethods when code cache gets full kvn parents: 1000 diff changeset	205 CompileBroker::set_should_compile_new_jobs(CompileBroker::run_compilation);
5f24d0319e54 4360113: Evict nmethods when code cache gets full kvn parents: 1000 diff changeset	206 set_was_full(false);
5f24d0319e54 4360113: Evict nmethods when code cache gets full kvn parents: 1000 diff changeset	207
5f24d0319e54 4360113: Evict nmethods when code cache gets full kvn parents: 1000 diff changeset	208 // Update the _last_was_full time so we can tell how fast the
5f24d0319e54 4360113: Evict nmethods when code cache gets full kvn parents: 1000 diff changeset	209 // code cache is filling up
5f24d0319e54 4360113: Evict nmethods when code cache gets full kvn parents: 1000 diff changeset	210 _last_was_full = os::javaTimeMillis();
5f24d0319e54 4360113: Evict nmethods when code cache gets full kvn parents: 1000 diff changeset	211
1644 2a47bd84841f 6965184: possible races in make_not_entrant_or_zombie never parents: 1615 diff changeset	212 log_sweep("restart_compiler");
1202 5f24d0319e54 4360113: Evict nmethods when code cache gets full kvn parents: 1000 diff changeset	213 }
5f24d0319e54 4360113: Evict nmethods when code cache gets full kvn parents: 1000 diff changeset	214 }
5f24d0319e54 4360113: Evict nmethods when code cache gets full kvn parents: 1000 diff changeset	215 }
0 a61af66fc99e Initial load duke parents: diff changeset	216 }
a61af66fc99e Initial load duke parents: diff changeset	217
1538 bfe29ec02863 6950075: nmethod sweeper should operate concurrently never parents: 1202 diff changeset	218 void NMethodSweeper::possibly_sweep() {
1644 2a47bd84841f 6965184: possible races in make_not_entrant_or_zombie never parents: 1615 diff changeset	219 assert(JavaThread::current()->thread_state() == _thread_in_vm, "must run in vm mode");
1538 bfe29ec02863 6950075: nmethod sweeper should operate concurrently never parents: 1202 diff changeset	220 if ((!MethodFlushing) \|\| (!_do_sweep)) return;
bfe29ec02863 6950075: nmethod sweeper should operate concurrently never parents: 1202 diff changeset	221
bfe29ec02863 6950075: nmethod sweeper should operate concurrently never parents: 1202 diff changeset	222 if (_invocations > 0) {
bfe29ec02863 6950075: nmethod sweeper should operate concurrently never parents: 1202 diff changeset	223 // Only one thread at a time will sweep
bfe29ec02863 6950075: nmethod sweeper should operate concurrently never parents: 1202 diff changeset	224 jint old = Atomic::cmpxchg( 1, &_sweep_started, 0 );
bfe29ec02863 6950075: nmethod sweeper should operate concurrently never parents: 1202 diff changeset	225 if (old != 0) {
bfe29ec02863 6950075: nmethod sweeper should operate concurrently never parents: 1202 diff changeset	226 return;
bfe29ec02863 6950075: nmethod sweeper should operate concurrently never parents: 1202 diff changeset	227 }
3384 f52ed367b66d 6996747: SIGSEGV in nmethod::cleanup_inline_caches / CompiledIC::verify never parents: 2482 diff changeset	228 #ifdef ASSERT
f52ed367b66d 6996747: SIGSEGV in nmethod::cleanup_inline_caches / CompiledIC::verify never parents: 2482 diff changeset	229 if (LogSweeper && _records == NULL) {
f52ed367b66d 6996747: SIGSEGV in nmethod::cleanup_inline_caches / CompiledIC::verify never parents: 2482 diff changeset	230 // Create the ring buffer for the logging code
6197 d2a62e0f25eb 6995781: Native Memory Tracking (Phase 1) zgu parents: 4945 diff changeset	231 _records = NEW_C_HEAP_ARRAY(SweeperRecord, SweeperLogEntries, mtGC);
3384 f52ed367b66d 6996747: SIGSEGV in nmethod::cleanup_inline_caches / CompiledIC::verify never parents: 2482 diff changeset	232 memset(_records, 0, sizeof(SweeperRecord) * SweeperLogEntries);
f52ed367b66d 6996747: SIGSEGV in nmethod::cleanup_inline_caches / CompiledIC::verify never parents: 2482 diff changeset	233 }
f52ed367b66d 6996747: SIGSEGV in nmethod::cleanup_inline_caches / CompiledIC::verify never parents: 2482 diff changeset	234 #endif
1644 2a47bd84841f 6965184: possible races in make_not_entrant_or_zombie never parents: 1615 diff changeset	235 if (_invocations > 0) {
2a47bd84841f 6965184: possible races in make_not_entrant_or_zombie never parents: 1615 diff changeset	236 sweep_code_cache();
2a47bd84841f 6965184: possible races in make_not_entrant_or_zombie never parents: 1615 diff changeset	237 _invocations--;
2a47bd84841f 6965184: possible races in make_not_entrant_or_zombie never parents: 1615 diff changeset	238 }
2a47bd84841f 6965184: possible races in make_not_entrant_or_zombie never parents: 1615 diff changeset	239 _sweep_started = 0;
1538 bfe29ec02863 6950075: nmethod sweeper should operate concurrently never parents: 1202 diff changeset	240 }
bfe29ec02863 6950075: nmethod sweeper should operate concurrently never parents: 1202 diff changeset	241 }
bfe29ec02863 6950075: nmethod sweeper should operate concurrently never parents: 1202 diff changeset	242
bfe29ec02863 6950075: nmethod sweeper should operate concurrently never parents: 1202 diff changeset	243 void NMethodSweeper::sweep_code_cache() {
bfe29ec02863 6950075: nmethod sweeper should operate concurrently never parents: 1202 diff changeset	244 #ifdef ASSERT
bfe29ec02863 6950075: nmethod sweeper should operate concurrently never parents: 1202 diff changeset	245 jlong sweep_start;
1644 2a47bd84841f 6965184: possible races in make_not_entrant_or_zombie never parents: 1615 diff changeset	246 if (PrintMethodFlushing) {
1538 bfe29ec02863 6950075: nmethod sweeper should operate concurrently never parents: 1202 diff changeset	247 sweep_start = os::javaTimeMillis();
bfe29ec02863 6950075: nmethod sweeper should operate concurrently never parents: 1202 diff changeset	248 }
bfe29ec02863 6950075: nmethod sweeper should operate concurrently never parents: 1202 diff changeset	249 #endif
bfe29ec02863 6950075: nmethod sweeper should operate concurrently never parents: 1202 diff changeset	250 if (PrintMethodFlushing && Verbose) {
1644 2a47bd84841f 6965184: possible races in make_not_entrant_or_zombie never parents: 1615 diff changeset	251 tty->print_cr("### Sweep at %d out of %d. Invocations left: %d", _seen, CodeCache::nof_nmethods(), _invocations);
1538 bfe29ec02863 6950075: nmethod sweeper should operate concurrently never parents: 1202 diff changeset	252 }
bfe29ec02863 6950075: nmethod sweeper should operate concurrently never parents: 1202 diff changeset	253
1644 2a47bd84841f 6965184: possible races in make_not_entrant_or_zombie never parents: 1615 diff changeset	254 // We want to visit all nmethods after NmethodSweepFraction
2a47bd84841f 6965184: possible races in make_not_entrant_or_zombie never parents: 1615 diff changeset	255 // invocations so divide the remaining number of nmethods by the
2a47bd84841f 6965184: possible races in make_not_entrant_or_zombie never parents: 1615 diff changeset	256 // remaining number of invocations. This is only an estimate since
2a47bd84841f 6965184: possible races in make_not_entrant_or_zombie never parents: 1615 diff changeset	257 // the number of nmethods changes during the sweep so the final
2a47bd84841f 6965184: possible races in make_not_entrant_or_zombie never parents: 1615 diff changeset	258 // stage must iterate until it there are no more nmethods.
2a47bd84841f 6965184: possible races in make_not_entrant_or_zombie never parents: 1615 diff changeset	259 int todo = (CodeCache::nof_nmethods() - _seen) / _invocations;
1538 bfe29ec02863 6950075: nmethod sweeper should operate concurrently never parents: 1202 diff changeset	260
bfe29ec02863 6950075: nmethod sweeper should operate concurrently never parents: 1202 diff changeset	261 assert(!SafepointSynchronize::is_at_safepoint(), "should not be in safepoint when we get here");
bfe29ec02863 6950075: nmethod sweeper should operate concurrently never parents: 1202 diff changeset	262 assert(!CodeCache_lock->owned_by_self(), "just checking");
bfe29ec02863 6950075: nmethod sweeper should operate concurrently never parents: 1202 diff changeset	263
bfe29ec02863 6950075: nmethod sweeper should operate concurrently never parents: 1202 diff changeset	264 {
bfe29ec02863 6950075: nmethod sweeper should operate concurrently never parents: 1202 diff changeset	265 MutexLockerEx mu(CodeCache_lock, Mutex::_no_safepoint_check_flag);
bfe29ec02863 6950075: nmethod sweeper should operate concurrently never parents: 1202 diff changeset	266
1644 2a47bd84841f 6965184: possible races in make_not_entrant_or_zombie never parents: 1615 diff changeset	267 // The last invocation iterates until there are no more nmethods
2a47bd84841f 6965184: possible races in make_not_entrant_or_zombie never parents: 1615 diff changeset	268 for (int i = 0; (i < todo \|\| _invocations == 1) && _current != NULL; i++) {
4945 cfdfbeac0a5b 7145345: Code cache sweeper must cooperate with safepoints iveresov parents: 3384 diff changeset	269 if (SafepointSynchronize::is_synchronizing()) { // Safepoint request
cfdfbeac0a5b 7145345: Code cache sweeper must cooperate with safepoints iveresov parents: 3384 diff changeset	270 if (PrintMethodFlushing && Verbose) {
cfdfbeac0a5b 7145345: Code cache sweeper must cooperate with safepoints iveresov parents: 3384 diff changeset	271 tty->print_cr("### Sweep at %d out of %d, invocation: %d, yielding to safepoint", _seen, CodeCache::nof_nmethods(), _invocations);
cfdfbeac0a5b 7145345: Code cache sweeper must cooperate with safepoints iveresov parents: 3384 diff changeset	272 }
cfdfbeac0a5b 7145345: Code cache sweeper must cooperate with safepoints iveresov parents: 3384 diff changeset	273 MutexUnlockerEx mu(CodeCache_lock, Mutex::_no_safepoint_check_flag);
1538 bfe29ec02863 6950075: nmethod sweeper should operate concurrently never parents: 1202 diff changeset	274
4945 cfdfbeac0a5b 7145345: Code cache sweeper must cooperate with safepoints iveresov parents: 3384 diff changeset	275 assert(Thread::current()->is_Java_thread(), "should be java thread");
cfdfbeac0a5b 7145345: Code cache sweeper must cooperate with safepoints iveresov parents: 3384 diff changeset	276 JavaThread* thread = (JavaThread*)Thread::current();
cfdfbeac0a5b 7145345: Code cache sweeper must cooperate with safepoints iveresov parents: 3384 diff changeset	277 ThreadBlockInVM tbivm(thread);
cfdfbeac0a5b 7145345: Code cache sweeper must cooperate with safepoints iveresov parents: 3384 diff changeset	278 thread->java_suspend_self();
cfdfbeac0a5b 7145345: Code cache sweeper must cooperate with safepoints iveresov parents: 3384 diff changeset	279 }
1644 2a47bd84841f 6965184: possible races in make_not_entrant_or_zombie never parents: 1615 diff changeset	280 // Since we will give up the CodeCache_lock, always skip ahead
2a47bd84841f 6965184: possible races in make_not_entrant_or_zombie never parents: 1615 diff changeset	281 // to the next nmethod. Other blobs can be deleted by other
2a47bd84841f 6965184: possible races in make_not_entrant_or_zombie never parents: 1615 diff changeset	282 // threads but nmethods are only reclaimed by the sweeper.
1615 ff38d05ea86f 6956958: assert(is_clean() \|\| is_call_to_compiled() \|\| is_call_to_interpreted() \|\| is_optimized() \|\| is_megam never parents: 1552 diff changeset	283 nmethod* next = CodeCache::next_nmethod(_current);
1538 bfe29ec02863 6950075: nmethod sweeper should operate concurrently never parents: 1202 diff changeset	284
bfe29ec02863 6950075: nmethod sweeper should operate concurrently never parents: 1202 diff changeset	285 // Now ready to process nmethod and give up CodeCache_lock
bfe29ec02863 6950075: nmethod sweeper should operate concurrently never parents: 1202 diff changeset	286 {
bfe29ec02863 6950075: nmethod sweeper should operate concurrently never parents: 1202 diff changeset	287 MutexUnlockerEx mu(CodeCache_lock, Mutex::_no_safepoint_check_flag);
1615 ff38d05ea86f 6956958: assert(is_clean() \|\| is_call_to_compiled() \|\| is_call_to_interpreted() \|\| is_optimized() \|\| is_megam never parents: 1552 diff changeset	288 process_nmethod(_current);
1538 bfe29ec02863 6950075: nmethod sweeper should operate concurrently never parents: 1202 diff changeset	289 }
bfe29ec02863 6950075: nmethod sweeper should operate concurrently never parents: 1202 diff changeset	290 _seen++;
bfe29ec02863 6950075: nmethod sweeper should operate concurrently never parents: 1202 diff changeset	291 _current = next;
bfe29ec02863 6950075: nmethod sweeper should operate concurrently never parents: 1202 diff changeset	292 }
bfe29ec02863 6950075: nmethod sweeper should operate concurrently never parents: 1202 diff changeset	293 }
bfe29ec02863 6950075: nmethod sweeper should operate concurrently never parents: 1202 diff changeset	294
1644 2a47bd84841f 6965184: possible races in make_not_entrant_or_zombie never parents: 1615 diff changeset	295 assert(_invocations > 1 \|\| _current == NULL, "must have scanned the whole cache");
2a47bd84841f 6965184: possible races in make_not_entrant_or_zombie never parents: 1615 diff changeset	296
1538 bfe29ec02863 6950075: nmethod sweeper should operate concurrently never parents: 1202 diff changeset	297 if (_current == NULL && !_rescan && (_locked_seen \|\| _not_entrant_seen_on_stack)) {
bfe29ec02863 6950075: nmethod sweeper should operate concurrently never parents: 1202 diff changeset	298 // we've completed a scan without making progress but there were
bfe29ec02863 6950075: nmethod sweeper should operate concurrently never parents: 1202 diff changeset	299 // nmethods we were unable to process either because they were
bfe29ec02863 6950075: nmethod sweeper should operate concurrently never parents: 1202 diff changeset	300 // locked or were still on stack. We don't have to aggresively
bfe29ec02863 6950075: nmethod sweeper should operate concurrently never parents: 1202 diff changeset	301 // clean them up so just stop scanning. We could scan once more
bfe29ec02863 6950075: nmethod sweeper should operate concurrently never parents: 1202 diff changeset	302 // but that complicates the control logic and it's unlikely to
bfe29ec02863 6950075: nmethod sweeper should operate concurrently never parents: 1202 diff changeset	303 // matter much.
bfe29ec02863 6950075: nmethod sweeper should operate concurrently never parents: 1202 diff changeset	304 if (PrintMethodFlushing) {
bfe29ec02863 6950075: nmethod sweeper should operate concurrently never parents: 1202 diff changeset	305 tty->print_cr("### Couldn't make progress on some nmethods so stopping sweep");
bfe29ec02863 6950075: nmethod sweeper should operate concurrently never parents: 1202 diff changeset	306 }
bfe29ec02863 6950075: nmethod sweeper should operate concurrently never parents: 1202 diff changeset	307 }
bfe29ec02863 6950075: nmethod sweeper should operate concurrently never parents: 1202 diff changeset	308
bfe29ec02863 6950075: nmethod sweeper should operate concurrently never parents: 1202 diff changeset	309 #ifdef ASSERT
bfe29ec02863 6950075: nmethod sweeper should operate concurrently never parents: 1202 diff changeset	310 if(PrintMethodFlushing) {
bfe29ec02863 6950075: nmethod sweeper should operate concurrently never parents: 1202 diff changeset	311 jlong sweep_end = os::javaTimeMillis();
bfe29ec02863 6950075: nmethod sweeper should operate concurrently never parents: 1202 diff changeset	312 tty->print_cr("### sweeper: sweep time(%d): " INT64_FORMAT, _invocations, sweep_end - sweep_start);
bfe29ec02863 6950075: nmethod sweeper should operate concurrently never parents: 1202 diff changeset	313 }
bfe29ec02863 6950075: nmethod sweeper should operate concurrently never parents: 1202 diff changeset	314 #endif
1644 2a47bd84841f 6965184: possible races in make_not_entrant_or_zombie never parents: 1615 diff changeset	315
2a47bd84841f 6965184: possible races in make_not_entrant_or_zombie never parents: 1615 diff changeset	316 if (_invocations == 1) {
2a47bd84841f 6965184: possible races in make_not_entrant_or_zombie never parents: 1615 diff changeset	317 log_sweep("finished");
2a47bd84841f 6965184: possible races in make_not_entrant_or_zombie never parents: 1615 diff changeset	318 }
1538 bfe29ec02863 6950075: nmethod sweeper should operate concurrently never parents: 1202 diff changeset	319 }
bfe29ec02863 6950075: nmethod sweeper should operate concurrently never parents: 1202 diff changeset	320
3384 f52ed367b66d 6996747: SIGSEGV in nmethod::cleanup_inline_caches / CompiledIC::verify never parents: 2482 diff changeset	321 class NMethodMarker: public StackObj {
f52ed367b66d 6996747: SIGSEGV in nmethod::cleanup_inline_caches / CompiledIC::verify never parents: 2482 diff changeset	322 private:
f52ed367b66d 6996747: SIGSEGV in nmethod::cleanup_inline_caches / CompiledIC::verify never parents: 2482 diff changeset	323 CompilerThread* _thread;
f52ed367b66d 6996747: SIGSEGV in nmethod::cleanup_inline_caches / CompiledIC::verify never parents: 2482 diff changeset	324 public:
f52ed367b66d 6996747: SIGSEGV in nmethod::cleanup_inline_caches / CompiledIC::verify never parents: 2482 diff changeset	325 NMethodMarker(nmethod* nm) {
f52ed367b66d 6996747: SIGSEGV in nmethod::cleanup_inline_caches / CompiledIC::verify never parents: 2482 diff changeset	326 _thread = CompilerThread::current();
f52ed367b66d 6996747: SIGSEGV in nmethod::cleanup_inline_caches / CompiledIC::verify never parents: 2482 diff changeset	327 _thread->set_scanned_nmethod(nm);
f52ed367b66d 6996747: SIGSEGV in nmethod::cleanup_inline_caches / CompiledIC::verify never parents: 2482 diff changeset	328 }
f52ed367b66d 6996747: SIGSEGV in nmethod::cleanup_inline_caches / CompiledIC::verify never parents: 2482 diff changeset	329 ~NMethodMarker() {
f52ed367b66d 6996747: SIGSEGV in nmethod::cleanup_inline_caches / CompiledIC::verify never parents: 2482 diff changeset	330 _thread->set_scanned_nmethod(NULL);
f52ed367b66d 6996747: SIGSEGV in nmethod::cleanup_inline_caches / CompiledIC::verify never parents: 2482 diff changeset	331 }
f52ed367b66d 6996747: SIGSEGV in nmethod::cleanup_inline_caches / CompiledIC::verify never parents: 2482 diff changeset	332 };
f52ed367b66d 6996747: SIGSEGV in nmethod::cleanup_inline_caches / CompiledIC::verify never parents: 2482 diff changeset	333
0 a61af66fc99e Initial load duke parents: diff changeset	334
a61af66fc99e Initial load duke parents: diff changeset	335 void NMethodSweeper::process_nmethod(nmethod *nm) {
1538 bfe29ec02863 6950075: nmethod sweeper should operate concurrently never parents: 1202 diff changeset	336 assert(!CodeCache_lock->owned_by_self(), "just checking");
bfe29ec02863 6950075: nmethod sweeper should operate concurrently never parents: 1202 diff changeset	337
3384 f52ed367b66d 6996747: SIGSEGV in nmethod::cleanup_inline_caches / CompiledIC::verify never parents: 2482 diff changeset	338 // Make sure this nmethod doesn't get unloaded during the scan,
f52ed367b66d 6996747: SIGSEGV in nmethod::cleanup_inline_caches / CompiledIC::verify never parents: 2482 diff changeset	339 // since the locks acquired below might safepoint.
f52ed367b66d 6996747: SIGSEGV in nmethod::cleanup_inline_caches / CompiledIC::verify never parents: 2482 diff changeset	340 NMethodMarker nmm(nm);
f52ed367b66d 6996747: SIGSEGV in nmethod::cleanup_inline_caches / CompiledIC::verify never parents: 2482 diff changeset	341
f52ed367b66d 6996747: SIGSEGV in nmethod::cleanup_inline_caches / CompiledIC::verify never parents: 2482 diff changeset	342 SWEEP(nm);
f52ed367b66d 6996747: SIGSEGV in nmethod::cleanup_inline_caches / CompiledIC::verify never parents: 2482 diff changeset	343
0 a61af66fc99e Initial load duke parents: diff changeset	344 // Skip methods that are currently referenced by the VM
a61af66fc99e Initial load duke parents: diff changeset	345 if (nm->is_locked_by_vm()) {
a61af66fc99e Initial load duke parents: diff changeset	346 // But still remember to clean-up inline caches for alive nmethods
a61af66fc99e Initial load duke parents: diff changeset	347 if (nm->is_alive()) {
a61af66fc99e Initial load duke parents: diff changeset	348 // Clean-up all inline caches that points to zombie/non-reentrant methods
1538 bfe29ec02863 6950075: nmethod sweeper should operate concurrently never parents: 1202 diff changeset	349 MutexLocker cl(CompiledIC_lock);
0 a61af66fc99e Initial load duke parents: diff changeset	350 nm->cleanup_inline_caches();
3384 f52ed367b66d 6996747: SIGSEGV in nmethod::cleanup_inline_caches / CompiledIC::verify never parents: 2482 diff changeset	351 SWEEP(nm);
0 a61af66fc99e Initial load duke parents: diff changeset	352 } else {
a61af66fc99e Initial load duke parents: diff changeset	353 _locked_seen++;
3384 f52ed367b66d 6996747: SIGSEGV in nmethod::cleanup_inline_caches / CompiledIC::verify never parents: 2482 diff changeset	354 SWEEP(nm);
0 a61af66fc99e Initial load duke parents: diff changeset	355 }
a61af66fc99e Initial load duke parents: diff changeset	356 return;
a61af66fc99e Initial load duke parents: diff changeset	357 }
a61af66fc99e Initial load duke parents: diff changeset	358
a61af66fc99e Initial load duke parents: diff changeset	359 if (nm->is_zombie()) {
a61af66fc99e Initial load duke parents: diff changeset	360 // If it is first time, we see nmethod then we mark it. Otherwise,
a61af66fc99e Initial load duke parents: diff changeset	361 // we reclame it. When we have seen a zombie method twice, we know that
1644 2a47bd84841f 6965184: possible races in make_not_entrant_or_zombie never parents: 1615 diff changeset	362 // there are no inline caches that refer to it.
0 a61af66fc99e Initial load duke parents: diff changeset	363 if (nm->is_marked_for_reclamation()) {
a61af66fc99e Initial load duke parents: diff changeset	364 assert(!nm->is_locked_by_vm(), "must not flush locked nmethods");
941 8b46c4d82093 4957990: Perm heap bloat in JVM ysr parents: 0 diff changeset	365 if (PrintMethodFlushing && Verbose) {
1202 5f24d0319e54 4360113: Evict nmethods when code cache gets full kvn parents: 1000 diff changeset	366 tty->print_cr("### Nmethod %3d/" PTR_FORMAT " (marked for reclamation) being flushed", nm->compile_id(), nm);
941 8b46c4d82093 4957990: Perm heap bloat in JVM ysr parents: 0 diff changeset	367 }
1538 bfe29ec02863 6950075: nmethod sweeper should operate concurrently never parents: 1202 diff changeset	368 MutexLockerEx mu(CodeCache_lock, Mutex::_no_safepoint_check_flag);
0 a61af66fc99e Initial load duke parents: diff changeset	369 nm->flush();
a61af66fc99e Initial load duke parents: diff changeset	370 } else {
941 8b46c4d82093 4957990: Perm heap bloat in JVM ysr parents: 0 diff changeset	371 if (PrintMethodFlushing && Verbose) {
1202 5f24d0319e54 4360113: Evict nmethods when code cache gets full kvn parents: 1000 diff changeset	372 tty->print_cr("### Nmethod %3d/" PTR_FORMAT " (zombie) being marked for reclamation", nm->compile_id(), nm);
941 8b46c4d82093 4957990: Perm heap bloat in JVM ysr parents: 0 diff changeset	373 }
0 a61af66fc99e Initial load duke parents: diff changeset	374 nm->mark_for_reclamation();
a61af66fc99e Initial load duke parents: diff changeset	375 _rescan = true;
3384 f52ed367b66d 6996747: SIGSEGV in nmethod::cleanup_inline_caches / CompiledIC::verify never parents: 2482 diff changeset	376 SWEEP(nm);
0 a61af66fc99e Initial load duke parents: diff changeset	377 }
a61af66fc99e Initial load duke parents: diff changeset	378 } else if (nm->is_not_entrant()) {
a61af66fc99e Initial load duke parents: diff changeset	379 // If there is no current activations of this method on the
a61af66fc99e Initial load duke parents: diff changeset	380 // stack we can safely convert it to a zombie method
a61af66fc99e Initial load duke parents: diff changeset	381 if (nm->can_not_entrant_be_converted()) {
941 8b46c4d82093 4957990: Perm heap bloat in JVM ysr parents: 0 diff changeset	382 if (PrintMethodFlushing && Verbose) {
1202 5f24d0319e54 4360113: Evict nmethods when code cache gets full kvn parents: 1000 diff changeset	383 tty->print_cr("### Nmethod %3d/" PTR_FORMAT " (not entrant) being made zombie", nm->compile_id(), nm);
941 8b46c4d82093 4957990: Perm heap bloat in JVM ysr parents: 0 diff changeset	384 }
0 a61af66fc99e Initial load duke parents: diff changeset	385 nm->make_zombie();
a61af66fc99e Initial load duke parents: diff changeset	386 _rescan = true;
3384 f52ed367b66d 6996747: SIGSEGV in nmethod::cleanup_inline_caches / CompiledIC::verify never parents: 2482 diff changeset	387 SWEEP(nm);
0 a61af66fc99e Initial load duke parents: diff changeset	388 } else {
a61af66fc99e Initial load duke parents: diff changeset	389 // Still alive, clean up its inline caches
1538 bfe29ec02863 6950075: nmethod sweeper should operate concurrently never parents: 1202 diff changeset	390 MutexLocker cl(CompiledIC_lock);
0 a61af66fc99e Initial load duke parents: diff changeset	391 nm->cleanup_inline_caches();
a61af66fc99e Initial load duke parents: diff changeset	392 // we coudn't transition this nmethod so don't immediately
a61af66fc99e Initial load duke parents: diff changeset	393 // request a rescan. If this method stays on the stack for a
1538 bfe29ec02863 6950075: nmethod sweeper should operate concurrently never parents: 1202 diff changeset	394 // long time we don't want to keep rescanning the code cache.
0 a61af66fc99e Initial load duke parents: diff changeset	395 _not_entrant_seen_on_stack++;
3384 f52ed367b66d 6996747: SIGSEGV in nmethod::cleanup_inline_caches / CompiledIC::verify never parents: 2482 diff changeset	396 SWEEP(nm);
0 a61af66fc99e Initial load duke parents: diff changeset	397 }
a61af66fc99e Initial load duke parents: diff changeset	398 } else if (nm->is_unloaded()) {
a61af66fc99e Initial load duke parents: diff changeset	399 // Unloaded code, just make it a zombie
941 8b46c4d82093 4957990: Perm heap bloat in JVM ysr parents: 0 diff changeset	400 if (PrintMethodFlushing && Verbose)
1202 5f24d0319e54 4360113: Evict nmethods when code cache gets full kvn parents: 1000 diff changeset	401 tty->print_cr("### Nmethod %3d/" PTR_FORMAT " (unloaded) being made zombie", nm->compile_id(), nm);
941 8b46c4d82093 4957990: Perm heap bloat in JVM ysr parents: 0 diff changeset	402 if (nm->is_osr_method()) {
0 a61af66fc99e Initial load duke parents: diff changeset	403 // No inline caches will ever point to osr methods, so we can just remove it
1538 bfe29ec02863 6950075: nmethod sweeper should operate concurrently never parents: 1202 diff changeset	404 MutexLockerEx mu(CodeCache_lock, Mutex::_no_safepoint_check_flag);
3384 f52ed367b66d 6996747: SIGSEGV in nmethod::cleanup_inline_caches / CompiledIC::verify never parents: 2482 diff changeset	405 SWEEP(nm);
0 a61af66fc99e Initial load duke parents: diff changeset	406 nm->flush();
a61af66fc99e Initial load duke parents: diff changeset	407 } else {
a61af66fc99e Initial load duke parents: diff changeset	408 nm->make_zombie();
a61af66fc99e Initial load duke parents: diff changeset	409 _rescan = true;
3384 f52ed367b66d 6996747: SIGSEGV in nmethod::cleanup_inline_caches / CompiledIC::verify never parents: 2482 diff changeset	410 SWEEP(nm);
0 a61af66fc99e Initial load duke parents: diff changeset	411 }
a61af66fc99e Initial load duke parents: diff changeset	412 } else {
a61af66fc99e Initial load duke parents: diff changeset	413 assert(nm->is_alive(), "should be alive");
1202 5f24d0319e54 4360113: Evict nmethods when code cache gets full kvn parents: 1000 diff changeset	414
5f24d0319e54 4360113: Evict nmethods when code cache gets full kvn parents: 1000 diff changeset	415 if (UseCodeCacheFlushing) {
5f24d0319e54 4360113: Evict nmethods when code cache gets full kvn parents: 1000 diff changeset	416 if ((nm->method()->code() != nm) && !(nm->is_locked_by_vm()) && !(nm->is_osr_method()) &&
5f24d0319e54 4360113: Evict nmethods when code cache gets full kvn parents: 1000 diff changeset	417 (_traversals > _was_full_traversal+2) && (((uint)nm->compile_id()) < _highest_marked) &&
5f24d0319e54 4360113: Evict nmethods when code cache gets full kvn parents: 1000 diff changeset	418 CodeCache::needs_flushing()) {
5f24d0319e54 4360113: Evict nmethods when code cache gets full kvn parents: 1000 diff changeset	419 // This method has not been called since the forced cleanup happened
5f24d0319e54 4360113: Evict nmethods when code cache gets full kvn parents: 1000 diff changeset	420 nm->make_not_entrant();
5f24d0319e54 4360113: Evict nmethods when code cache gets full kvn parents: 1000 diff changeset	421 }
5f24d0319e54 4360113: Evict nmethods when code cache gets full kvn parents: 1000 diff changeset	422 }
5f24d0319e54 4360113: Evict nmethods when code cache gets full kvn parents: 1000 diff changeset	423
0 a61af66fc99e Initial load duke parents: diff changeset	424 // Clean-up all inline caches that points to zombie/non-reentrant methods
1538 bfe29ec02863 6950075: nmethod sweeper should operate concurrently never parents: 1202 diff changeset	425 MutexLocker cl(CompiledIC_lock);
0 a61af66fc99e Initial load duke parents: diff changeset	426 nm->cleanup_inline_caches();
3384 f52ed367b66d 6996747: SIGSEGV in nmethod::cleanup_inline_caches / CompiledIC::verify never parents: 2482 diff changeset	427 SWEEP(nm);
0 a61af66fc99e Initial load duke parents: diff changeset	428 }
a61af66fc99e Initial load duke parents: diff changeset	429 }
1202 5f24d0319e54 4360113: Evict nmethods when code cache gets full kvn parents: 1000 diff changeset	430
5f24d0319e54 4360113: Evict nmethods when code cache gets full kvn parents: 1000 diff changeset	431 // Code cache unloading: when compilers notice the code cache is getting full,
5f24d0319e54 4360113: Evict nmethods when code cache gets full kvn parents: 1000 diff changeset	432 // they will call a vm op that comes here. This code attempts to speculatively
5f24d0319e54 4360113: Evict nmethods when code cache gets full kvn parents: 1000 diff changeset	433 // unload the oldest half of the nmethods (based on the compile job id) by
5f24d0319e54 4360113: Evict nmethods when code cache gets full kvn parents: 1000 diff changeset	434 // saving the old code in a list in the CodeCache. Then
1538 bfe29ec02863 6950075: nmethod sweeper should operate concurrently never parents: 1202 diff changeset	435 // execution resumes. If a method so marked is not called by the second sweeper
bfe29ec02863 6950075: nmethod sweeper should operate concurrently never parents: 1202 diff changeset	436 // stack traversal after the current one, the nmethod will be marked non-entrant and
1202 5f24d0319e54 4360113: Evict nmethods when code cache gets full kvn parents: 1000 diff changeset	437 // got rid of by normal sweeping. If the method is called, the methodOop's
5f24d0319e54 4360113: Evict nmethods when code cache gets full kvn parents: 1000 diff changeset	438 // _code field is restored and the methodOop/nmethod
5f24d0319e54 4360113: Evict nmethods when code cache gets full kvn parents: 1000 diff changeset	439 // go back to their normal state.
5f24d0319e54 4360113: Evict nmethods when code cache gets full kvn parents: 1000 diff changeset	440 void NMethodSweeper::handle_full_code_cache(bool is_full) {
5f24d0319e54 4360113: Evict nmethods when code cache gets full kvn parents: 1000 diff changeset	441 // Only the first one to notice can advise us to start early cleaning
5f24d0319e54 4360113: Evict nmethods when code cache gets full kvn parents: 1000 diff changeset	442 if (!is_full){
5f24d0319e54 4360113: Evict nmethods when code cache gets full kvn parents: 1000 diff changeset	443 jint old = Atomic::cmpxchg( 1, &_advise_to_sweep, 0 );
5f24d0319e54 4360113: Evict nmethods when code cache gets full kvn parents: 1000 diff changeset	444 if (old != 0) {
5f24d0319e54 4360113: Evict nmethods when code cache gets full kvn parents: 1000 diff changeset	445 return;
5f24d0319e54 4360113: Evict nmethods when code cache gets full kvn parents: 1000 diff changeset	446 }
5f24d0319e54 4360113: Evict nmethods when code cache gets full kvn parents: 1000 diff changeset	447 }
5f24d0319e54 4360113: Evict nmethods when code cache gets full kvn parents: 1000 diff changeset	448
5f24d0319e54 4360113: Evict nmethods when code cache gets full kvn parents: 1000 diff changeset	449 if (is_full) {
5f24d0319e54 4360113: Evict nmethods when code cache gets full kvn parents: 1000 diff changeset	450 // Since code cache is full, immediately stop new compiles
5f24d0319e54 4360113: Evict nmethods when code cache gets full kvn parents: 1000 diff changeset	451 bool did_set = CompileBroker::set_should_compile_new_jobs(CompileBroker::stop_compilation);
5f24d0319e54 4360113: Evict nmethods when code cache gets full kvn parents: 1000 diff changeset	452 if (!did_set) {
5f24d0319e54 4360113: Evict nmethods when code cache gets full kvn parents: 1000 diff changeset	453 // only the first to notice can start the cleaning,
5f24d0319e54 4360113: Evict nmethods when code cache gets full kvn parents: 1000 diff changeset	454 // others will go back and block
5f24d0319e54 4360113: Evict nmethods when code cache gets full kvn parents: 1000 diff changeset	455 return;
5f24d0319e54 4360113: Evict nmethods when code cache gets full kvn parents: 1000 diff changeset	456 }
5f24d0319e54 4360113: Evict nmethods when code cache gets full kvn parents: 1000 diff changeset	457 set_was_full(true);
5f24d0319e54 4360113: Evict nmethods when code cache gets full kvn parents: 1000 diff changeset	458
5f24d0319e54 4360113: Evict nmethods when code cache gets full kvn parents: 1000 diff changeset	459 // If we run out within MinCodeCacheFlushingInterval of the last unload time, give up
5f24d0319e54 4360113: Evict nmethods when code cache gets full kvn parents: 1000 diff changeset	460 jlong now = os::javaTimeMillis();
5f24d0319e54 4360113: Evict nmethods when code cache gets full kvn parents: 1000 diff changeset	461 jlong max_interval = (jlong)MinCodeCacheFlushingInterval * (jlong)1000;
5f24d0319e54 4360113: Evict nmethods when code cache gets full kvn parents: 1000 diff changeset	462 jlong curr_interval = now - _last_was_full;
5f24d0319e54 4360113: Evict nmethods when code cache gets full kvn parents: 1000 diff changeset	463 if (curr_interval < max_interval) {
5f24d0319e54 4360113: Evict nmethods when code cache gets full kvn parents: 1000 diff changeset	464 _rescan = true;
1644 2a47bd84841f 6965184: possible races in make_not_entrant_or_zombie never parents: 1615 diff changeset	465 log_sweep("disable_compiler", "flushing_interval='" UINT64_FORMAT "'",
2a47bd84841f 6965184: possible races in make_not_entrant_or_zombie never parents: 1615 diff changeset	466 curr_interval/1000);
1202 5f24d0319e54 4360113: Evict nmethods when code cache gets full kvn parents: 1000 diff changeset	467 return;
5f24d0319e54 4360113: Evict nmethods when code cache gets full kvn parents: 1000 diff changeset	468 }
5f24d0319e54 4360113: Evict nmethods when code cache gets full kvn parents: 1000 diff changeset	469 }
5f24d0319e54 4360113: Evict nmethods when code cache gets full kvn parents: 1000 diff changeset	470
5f24d0319e54 4360113: Evict nmethods when code cache gets full kvn parents: 1000 diff changeset	471 VM_HandleFullCodeCache op(is_full);
5f24d0319e54 4360113: Evict nmethods when code cache gets full kvn parents: 1000 diff changeset	472 VMThread::execute(&op);
5f24d0319e54 4360113: Evict nmethods when code cache gets full kvn parents: 1000 diff changeset	473
5f24d0319e54 4360113: Evict nmethods when code cache gets full kvn parents: 1000 diff changeset	474 // rescan again as soon as possible
5f24d0319e54 4360113: Evict nmethods when code cache gets full kvn parents: 1000 diff changeset	475 _rescan = true;
5f24d0319e54 4360113: Evict nmethods when code cache gets full kvn parents: 1000 diff changeset	476 }
5f24d0319e54 4360113: Evict nmethods when code cache gets full kvn parents: 1000 diff changeset	477
5f24d0319e54 4360113: Evict nmethods when code cache gets full kvn parents: 1000 diff changeset	478 void NMethodSweeper::speculative_disconnect_nmethods(bool is_full) {
5f24d0319e54 4360113: Evict nmethods when code cache gets full kvn parents: 1000 diff changeset	479 // If there was a race in detecting full code cache, only run
5f24d0319e54 4360113: Evict nmethods when code cache gets full kvn parents: 1000 diff changeset	480 // one vm op for it or keep the compiler shut off
5f24d0319e54 4360113: Evict nmethods when code cache gets full kvn parents: 1000 diff changeset	481
5f24d0319e54 4360113: Evict nmethods when code cache gets full kvn parents: 1000 diff changeset	482 debug_only(jlong start = os::javaTimeMillis();)
5f24d0319e54 4360113: Evict nmethods when code cache gets full kvn parents: 1000 diff changeset	483
5f24d0319e54 4360113: Evict nmethods when code cache gets full kvn parents: 1000 diff changeset	484 if ((!was_full()) && (is_full)) {
5f24d0319e54 4360113: Evict nmethods when code cache gets full kvn parents: 1000 diff changeset	485 if (!CodeCache::needs_flushing()) {
1644 2a47bd84841f 6965184: possible races in make_not_entrant_or_zombie never parents: 1615 diff changeset	486 log_sweep("restart_compiler");
1202 5f24d0319e54 4360113: Evict nmethods when code cache gets full kvn parents: 1000 diff changeset	487 CompileBroker::set_should_compile_new_jobs(CompileBroker::run_compilation);
5f24d0319e54 4360113: Evict nmethods when code cache gets full kvn parents: 1000 diff changeset	488 return;
5f24d0319e54 4360113: Evict nmethods when code cache gets full kvn parents: 1000 diff changeset	489 }
5f24d0319e54 4360113: Evict nmethods when code cache gets full kvn parents: 1000 diff changeset	490 }
5f24d0319e54 4360113: Evict nmethods when code cache gets full kvn parents: 1000 diff changeset	491
5f24d0319e54 4360113: Evict nmethods when code cache gets full kvn parents: 1000 diff changeset	492 // Traverse the code cache trying to dump the oldest nmethods
5f24d0319e54 4360113: Evict nmethods when code cache gets full kvn parents: 1000 diff changeset	493 uint curr_max_comp_id = CompileBroker::get_compilation_id();
5f24d0319e54 4360113: Evict nmethods when code cache gets full kvn parents: 1000 diff changeset	494 uint flush_target = ((curr_max_comp_id - _highest_marked) >> 1) + _highest_marked;
1644 2a47bd84841f 6965184: possible races in make_not_entrant_or_zombie never parents: 1615 diff changeset	495 log_sweep("start_cleaning");
1202 5f24d0319e54 4360113: Evict nmethods when code cache gets full kvn parents: 1000 diff changeset	496
5f24d0319e54 4360113: Evict nmethods when code cache gets full kvn parents: 1000 diff changeset	497 nmethod* nm = CodeCache::alive_nmethod(CodeCache::first());
5f24d0319e54 4360113: Evict nmethods when code cache gets full kvn parents: 1000 diff changeset	498 jint disconnected = 0;
5f24d0319e54 4360113: Evict nmethods when code cache gets full kvn parents: 1000 diff changeset	499 jint made_not_entrant = 0;
5f24d0319e54 4360113: Evict nmethods when code cache gets full kvn parents: 1000 diff changeset	500 while ((nm != NULL)){
5f24d0319e54 4360113: Evict nmethods when code cache gets full kvn parents: 1000 diff changeset	501 uint curr_comp_id = nm->compile_id();
5f24d0319e54 4360113: Evict nmethods when code cache gets full kvn parents: 1000 diff changeset	502
5f24d0319e54 4360113: Evict nmethods when code cache gets full kvn parents: 1000 diff changeset	503 // OSR methods cannot be flushed like this. Also, don't flush native methods
5f24d0319e54 4360113: Evict nmethods when code cache gets full kvn parents: 1000 diff changeset	504 // since they are part of the JDK in most cases
5f24d0319e54 4360113: Evict nmethods when code cache gets full kvn parents: 1000 diff changeset	505 if (nm->is_in_use() && (!nm->is_osr_method()) && (!nm->is_locked_by_vm()) &&
5f24d0319e54 4360113: Evict nmethods when code cache gets full kvn parents: 1000 diff changeset	506 (!nm->is_native_method()) && ((curr_comp_id < flush_target))) {
5f24d0319e54 4360113: Evict nmethods when code cache gets full kvn parents: 1000 diff changeset	507
5f24d0319e54 4360113: Evict nmethods when code cache gets full kvn parents: 1000 diff changeset	508 if ((nm->method()->code() == nm)) {
5f24d0319e54 4360113: Evict nmethods when code cache gets full kvn parents: 1000 diff changeset	509 // This method has not been previously considered for
5f24d0319e54 4360113: Evict nmethods when code cache gets full kvn parents: 1000 diff changeset	510 // unloading or it was restored already
5f24d0319e54 4360113: Evict nmethods when code cache gets full kvn parents: 1000 diff changeset	511 CodeCache::speculatively_disconnect(nm);
5f24d0319e54 4360113: Evict nmethods when code cache gets full kvn parents: 1000 diff changeset	512 disconnected++;
5f24d0319e54 4360113: Evict nmethods when code cache gets full kvn parents: 1000 diff changeset	513 } else if (nm->is_speculatively_disconnected()) {
5f24d0319e54 4360113: Evict nmethods when code cache gets full kvn parents: 1000 diff changeset	514 // This method was previously considered for preemptive unloading and was not called since then
1783 d5d065957597 6953144: Tiered compilation iveresov parents: 1646 diff changeset	515 CompilationPolicy::policy()->delay_compilation(nm->method());
1202 5f24d0319e54 4360113: Evict nmethods when code cache gets full kvn parents: 1000 diff changeset	516 nm->make_not_entrant();
5f24d0319e54 4360113: Evict nmethods when code cache gets full kvn parents: 1000 diff changeset	517 made_not_entrant++;
5f24d0319e54 4360113: Evict nmethods when code cache gets full kvn parents: 1000 diff changeset	518 }
5f24d0319e54 4360113: Evict nmethods when code cache gets full kvn parents: 1000 diff changeset	519
5f24d0319e54 4360113: Evict nmethods when code cache gets full kvn parents: 1000 diff changeset	520 if (curr_comp_id > _highest_marked) {
5f24d0319e54 4360113: Evict nmethods when code cache gets full kvn parents: 1000 diff changeset	521 _highest_marked = curr_comp_id;
5f24d0319e54 4360113: Evict nmethods when code cache gets full kvn parents: 1000 diff changeset	522 }
5f24d0319e54 4360113: Evict nmethods when code cache gets full kvn parents: 1000 diff changeset	523 }
5f24d0319e54 4360113: Evict nmethods when code cache gets full kvn parents: 1000 diff changeset	524 nm = CodeCache::alive_nmethod(CodeCache::next(nm));
5f24d0319e54 4360113: Evict nmethods when code cache gets full kvn parents: 1000 diff changeset	525 }
5f24d0319e54 4360113: Evict nmethods when code cache gets full kvn parents: 1000 diff changeset	526
1644 2a47bd84841f 6965184: possible races in make_not_entrant_or_zombie never parents: 1615 diff changeset	527 log_sweep("stop_cleaning",
2a47bd84841f 6965184: possible races in make_not_entrant_or_zombie never parents: 1615 diff changeset	528 "disconnected='" UINT32_FORMAT "' made_not_entrant='" UINT32_FORMAT "'",
2a47bd84841f 6965184: possible races in make_not_entrant_or_zombie never parents: 1615 diff changeset	529 disconnected, made_not_entrant);
1202 5f24d0319e54 4360113: Evict nmethods when code cache gets full kvn parents: 1000 diff changeset	530
1538 bfe29ec02863 6950075: nmethod sweeper should operate concurrently never parents: 1202 diff changeset	531 // Shut off compiler. Sweeper will start over with a new stack scan and
bfe29ec02863 6950075: nmethod sweeper should operate concurrently never parents: 1202 diff changeset	532 // traversal cycle and turn it back on if it clears enough space.
1202 5f24d0319e54 4360113: Evict nmethods when code cache gets full kvn parents: 1000 diff changeset	533 if (was_full()) {
5f24d0319e54 4360113: Evict nmethods when code cache gets full kvn parents: 1000 diff changeset	534 _last_was_full = os::javaTimeMillis();
5f24d0319e54 4360113: Evict nmethods when code cache gets full kvn parents: 1000 diff changeset	535 CompileBroker::set_should_compile_new_jobs(CompileBroker::stop_compilation);
5f24d0319e54 4360113: Evict nmethods when code cache gets full kvn parents: 1000 diff changeset	536 }
5f24d0319e54 4360113: Evict nmethods when code cache gets full kvn parents: 1000 diff changeset	537
5f24d0319e54 4360113: Evict nmethods when code cache gets full kvn parents: 1000 diff changeset	538 // After two more traversals the sweeper will get rid of unrestored nmethods
5f24d0319e54 4360113: Evict nmethods when code cache gets full kvn parents: 1000 diff changeset	539 _was_full_traversal = _traversals;
5f24d0319e54 4360113: Evict nmethods when code cache gets full kvn parents: 1000 diff changeset	540 #ifdef ASSERT
5f24d0319e54 4360113: Evict nmethods when code cache gets full kvn parents: 1000 diff changeset	541 jlong end = os::javaTimeMillis();
5f24d0319e54 4360113: Evict nmethods when code cache gets full kvn parents: 1000 diff changeset	542 if(PrintMethodFlushing && Verbose) {
5f24d0319e54 4360113: Evict nmethods when code cache gets full kvn parents: 1000 diff changeset	543 tty->print_cr("### sweeper: unload time: " INT64_FORMAT, end-start);
5f24d0319e54 4360113: Evict nmethods when code cache gets full kvn parents: 1000 diff changeset	544 }
5f24d0319e54 4360113: Evict nmethods when code cache gets full kvn parents: 1000 diff changeset	545 #endif
5f24d0319e54 4360113: Evict nmethods when code cache gets full kvn parents: 1000 diff changeset	546 }
1644 2a47bd84841f 6965184: possible races in make_not_entrant_or_zombie never parents: 1615 diff changeset	547
2a47bd84841f 6965184: possible races in make_not_entrant_or_zombie never parents: 1615 diff changeset	548
2a47bd84841f 6965184: possible races in make_not_entrant_or_zombie never parents: 1615 diff changeset	549 // Print out some state information about the current sweep and the
2a47bd84841f 6965184: possible races in make_not_entrant_or_zombie never parents: 1615 diff changeset	550 // state of the code cache if it's requested.
2a47bd84841f 6965184: possible races in make_not_entrant_or_zombie never parents: 1615 diff changeset	551 void NMethodSweeper::log_sweep(const char* msg, const char* format, ...) {
2a47bd84841f 6965184: possible races in make_not_entrant_or_zombie never parents: 1615 diff changeset	552 if (PrintMethodFlushing) {
2482 dbccacb79c63 7036236: VM crashes assert((!inside_attrs()) \|\| is_error_reported()) failed ... iveresov parents: 2426 diff changeset	553 stringStream s;
dbccacb79c63 7036236: VM crashes assert((!inside_attrs()) \|\| is_error_reported()) failed ... iveresov parents: 2426 diff changeset	554 // Dump code cache state into a buffer before locking the tty,
dbccacb79c63 7036236: VM crashes assert((!inside_attrs()) \|\| is_error_reported()) failed ... iveresov parents: 2426 diff changeset	555 // because log_state() will use locks causing lock conflicts.
dbccacb79c63 7036236: VM crashes assert((!inside_attrs()) \|\| is_error_reported()) failed ... iveresov parents: 2426 diff changeset	556 CodeCache::log_state(&s);
dbccacb79c63 7036236: VM crashes assert((!inside_attrs()) \|\| is_error_reported()) failed ... iveresov parents: 2426 diff changeset	557
1644 2a47bd84841f 6965184: possible races in make_not_entrant_or_zombie never parents: 1615 diff changeset	558 ttyLocker ttyl;
2a47bd84841f 6965184: possible races in make_not_entrant_or_zombie never parents: 1615 diff changeset	559 tty->print("### sweeper: %s ", msg);
2a47bd84841f 6965184: possible races in make_not_entrant_or_zombie never parents: 1615 diff changeset	560 if (format != NULL) {
2a47bd84841f 6965184: possible races in make_not_entrant_or_zombie never parents: 1615 diff changeset	561 va_list ap;
2a47bd84841f 6965184: possible races in make_not_entrant_or_zombie never parents: 1615 diff changeset	562 va_start(ap, format);
2a47bd84841f 6965184: possible races in make_not_entrant_or_zombie never parents: 1615 diff changeset	563 tty->vprint(format, ap);
2a47bd84841f 6965184: possible races in make_not_entrant_or_zombie never parents: 1615 diff changeset	564 va_end(ap);
2a47bd84841f 6965184: possible races in make_not_entrant_or_zombie never parents: 1615 diff changeset	565 }
2482 dbccacb79c63 7036236: VM crashes assert((!inside_attrs()) \|\| is_error_reported()) failed ... iveresov parents: 2426 diff changeset	566 tty->print_cr(s.as_string());
1644 2a47bd84841f 6965184: possible races in make_not_entrant_or_zombie never parents: 1615 diff changeset	567 }
2a47bd84841f 6965184: possible races in make_not_entrant_or_zombie never parents: 1615 diff changeset	568
2a47bd84841f 6965184: possible races in make_not_entrant_or_zombie never parents: 1615 diff changeset	569 if (LogCompilation && (xtty != NULL)) {
2482 dbccacb79c63 7036236: VM crashes assert((!inside_attrs()) \|\| is_error_reported()) failed ... iveresov parents: 2426 diff changeset	570 stringStream s;
dbccacb79c63 7036236: VM crashes assert((!inside_attrs()) \|\| is_error_reported()) failed ... iveresov parents: 2426 diff changeset	571 // Dump code cache state into a buffer before locking the tty,
dbccacb79c63 7036236: VM crashes assert((!inside_attrs()) \|\| is_error_reported()) failed ... iveresov parents: 2426 diff changeset	572 // because log_state() will use locks causing lock conflicts.
dbccacb79c63 7036236: VM crashes assert((!inside_attrs()) \|\| is_error_reported()) failed ... iveresov parents: 2426 diff changeset	573 CodeCache::log_state(&s);
dbccacb79c63 7036236: VM crashes assert((!inside_attrs()) \|\| is_error_reported()) failed ... iveresov parents: 2426 diff changeset	574
1644 2a47bd84841f 6965184: possible races in make_not_entrant_or_zombie never parents: 1615 diff changeset	575 ttyLocker ttyl;
1646 8d5934a77f10 6968385: malformed xml in sweeper logging never parents: 1644 diff changeset	576 xtty->begin_elem("sweeper state='%s' traversals='" INTX_FORMAT "' ", msg, (intx)traversal_count());
1644 2a47bd84841f 6965184: possible races in make_not_entrant_or_zombie never parents: 1615 diff changeset	577 if (format != NULL) {
2a47bd84841f 6965184: possible races in make_not_entrant_or_zombie never parents: 1615 diff changeset	578 va_list ap;
2a47bd84841f 6965184: possible races in make_not_entrant_or_zombie never parents: 1615 diff changeset	579 va_start(ap, format);
2a47bd84841f 6965184: possible races in make_not_entrant_or_zombie never parents: 1615 diff changeset	580 xtty->vprint(format, ap);
2a47bd84841f 6965184: possible races in make_not_entrant_or_zombie never parents: 1615 diff changeset	581 va_end(ap);
2a47bd84841f 6965184: possible races in make_not_entrant_or_zombie never parents: 1615 diff changeset	582 }
2482 dbccacb79c63 7036236: VM crashes assert((!inside_attrs()) \|\| is_error_reported()) failed ... iveresov parents: 2426 diff changeset	583 xtty->print(s.as_string());
1644 2a47bd84841f 6965184: possible races in make_not_entrant_or_zombie never parents: 1615 diff changeset	584 xtty->stamp();
2a47bd84841f 6965184: possible races in make_not_entrant_or_zombie never parents: 1615 diff changeset	585 xtty->end_elem();
2a47bd84841f 6965184: possible races in make_not_entrant_or_zombie never parents: 1615 diff changeset	586 }
2a47bd84841f 6965184: possible races in make_not_entrant_or_zombie never parents: 1615 diff changeset	587 }

Mercurial > hg > graal-compiler

annotate src/share/vm/runtime/sweeper.cpp @ 6197:d2a62e0f25eb