Mercurial > hg > truffle

annotate src/share/vm/runtime/sweeper.cpp @ 3384:f52ed367b66d

Find changesets by keywords (author, files, the commit message), revision number or hash, or revset expression.
6996747: SIGSEGV in nmethod::cleanup_inline_caches / CompiledIC::verify Reviewed-by: kvn, iveresov
author never
date Mon, 16 May 2011 22:16:44 -0700
parents dbccacb79c63
children dc7902820c9b cfdfbeac0a5b
Ignore whitespace changes - Everywhere: Within whitespace: At end of lines:
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
f52ed367b66d 6996747: SIGSEGV in nmethod::cleanup_inline_caches / CompiledIC::verify
never
parents: 2482
diff changeset
231 _records = NEW_C_HEAP_ARRAY(SweeperRecord, SweeperLogEntries);
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++) {
1538
bfe29ec02863 6950075: nmethod sweeper should operate concurrently
never
parents: 1202
diff changeset
269
1644
2a47bd84841f 6965184: possible races in make_not_entrant_or_zombie
never
parents: 1615
diff changeset
270 // 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
271 // 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
272 // 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
273 nmethod* next = CodeCache::next_nmethod(_current);
1538
bfe29ec02863 6950075: nmethod sweeper should operate concurrently
never
parents: 1202
diff changeset
274
bfe29ec02863 6950075: nmethod sweeper should operate concurrently
never
parents: 1202
diff changeset
275 // Now ready to process nmethod and give up CodeCache_lock
bfe29ec02863 6950075: nmethod sweeper should operate concurrently
never
parents: 1202
diff changeset
276 {
bfe29ec02863 6950075: nmethod sweeper should operate concurrently
never
parents: 1202
diff changeset
277 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
278 process_nmethod(_current);
1538
bfe29ec02863 6950075: nmethod sweeper should operate concurrently
never
parents: 1202
diff changeset
279 }
bfe29ec02863 6950075: nmethod sweeper should operate concurrently
never
parents: 1202
diff changeset
280 _seen++;
bfe29ec02863 6950075: nmethod sweeper should operate concurrently
never
parents: 1202
diff changeset
281 _current = next;
bfe29ec02863 6950075: nmethod sweeper should operate concurrently
never
parents: 1202
diff changeset
282 }
bfe29ec02863 6950075: nmethod sweeper should operate concurrently
never
parents: 1202
diff changeset
283 }
bfe29ec02863 6950075: nmethod sweeper should operate concurrently
never
parents: 1202
diff changeset
284
1644
2a47bd84841f 6965184: possible races in make_not_entrant_or_zombie
never
parents: 1615
diff changeset
285 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
286
1538
bfe29ec02863 6950075: nmethod sweeper should operate concurrently
never
parents: 1202
diff changeset
287 if (_current == NULL && !_rescan && (_locked_seen || _not_entrant_seen_on_stack)) {
bfe29ec02863 6950075: nmethod sweeper should operate concurrently
never
parents: 1202
diff changeset
288 // we've completed a scan without making progress but there were
bfe29ec02863 6950075: nmethod sweeper should operate concurrently
never
parents: 1202
diff changeset
289 // nmethods we were unable to process either because they were
bfe29ec02863 6950075: nmethod sweeper should operate concurrently
never
parents: 1202
diff changeset
290 // locked or were still on stack. We don't have to aggresively
bfe29ec02863 6950075: nmethod sweeper should operate concurrently
never
parents: 1202
diff changeset
291 // clean them up so just stop scanning. We could scan once more
bfe29ec02863 6950075: nmethod sweeper should operate concurrently
never
parents: 1202
diff changeset
292 // but that complicates the control logic and it's unlikely to
bfe29ec02863 6950075: nmethod sweeper should operate concurrently
never
parents: 1202
diff changeset
293 // matter much.
bfe29ec02863 6950075: nmethod sweeper should operate concurrently
never
parents: 1202
diff changeset
294 if (PrintMethodFlushing) {
bfe29ec02863 6950075: nmethod sweeper should operate concurrently
never
parents: 1202
diff changeset
295 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
296 }
bfe29ec02863 6950075: nmethod sweeper should operate concurrently
never
parents: 1202
diff changeset
297 }
bfe29ec02863 6950075: nmethod sweeper should operate concurrently
never
parents: 1202
diff changeset
298
bfe29ec02863 6950075: nmethod sweeper should operate concurrently
never
parents: 1202
diff changeset
299 #ifdef ASSERT
bfe29ec02863 6950075: nmethod sweeper should operate concurrently
never
parents: 1202
diff changeset
300 if(PrintMethodFlushing) {
bfe29ec02863 6950075: nmethod sweeper should operate concurrently
never
parents: 1202
diff changeset
301 jlong sweep_end = os::javaTimeMillis();
bfe29ec02863 6950075: nmethod sweeper should operate concurrently
never
parents: 1202
diff changeset
302 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
303 }
bfe29ec02863 6950075: nmethod sweeper should operate concurrently
never
parents: 1202
diff changeset
304 #endif
1644
2a47bd84841f 6965184: possible races in make_not_entrant_or_zombie
never
parents: 1615
diff changeset
305
2a47bd84841f 6965184: possible races in make_not_entrant_or_zombie
never
parents: 1615
diff changeset
306 if (_invocations == 1) {
2a47bd84841f 6965184: possible races in make_not_entrant_or_zombie
never
parents: 1615
diff changeset
307 log_sweep("finished");
2a47bd84841f 6965184: possible races in make_not_entrant_or_zombie
never
parents: 1615
diff changeset
308 }
1538
bfe29ec02863 6950075: nmethod sweeper should operate concurrently
never
parents: 1202
diff changeset
309 }
bfe29ec02863 6950075: nmethod sweeper should operate concurrently
never
parents: 1202
diff changeset
310
3384
f52ed367b66d 6996747: SIGSEGV in nmethod::cleanup_inline_caches / CompiledIC::verify
never
parents: 2482
diff changeset
311 class NMethodMarker: public StackObj {
f52ed367b66d 6996747: SIGSEGV in nmethod::cleanup_inline_caches / CompiledIC::verify
never
parents: 2482
diff changeset
312 private:
f52ed367b66d 6996747: SIGSEGV in nmethod::cleanup_inline_caches / CompiledIC::verify
never
parents: 2482
diff changeset
313 CompilerThread* _thread;
f52ed367b66d 6996747: SIGSEGV in nmethod::cleanup_inline_caches / CompiledIC::verify
never
parents: 2482
diff changeset
314 public:
f52ed367b66d 6996747: SIGSEGV in nmethod::cleanup_inline_caches / CompiledIC::verify
never
parents: 2482
diff changeset
315 NMethodMarker(nmethod* nm) {
f52ed367b66d 6996747: SIGSEGV in nmethod::cleanup_inline_caches / CompiledIC::verify
never
parents: 2482
diff changeset
316 _thread = CompilerThread::current();
f52ed367b66d 6996747: SIGSEGV in nmethod::cleanup_inline_caches / CompiledIC::verify
never
parents: 2482
diff changeset
317 _thread->set_scanned_nmethod(nm);
f52ed367b66d 6996747: SIGSEGV in nmethod::cleanup_inline_caches / CompiledIC::verify
never
parents: 2482
diff changeset
318 }
f52ed367b66d 6996747: SIGSEGV in nmethod::cleanup_inline_caches / CompiledIC::verify
never
parents: 2482
diff changeset
319 ~NMethodMarker() {
f52ed367b66d 6996747: SIGSEGV in nmethod::cleanup_inline_caches / CompiledIC::verify
never
parents: 2482
diff changeset
320 _thread->set_scanned_nmethod(NULL);
f52ed367b66d 6996747: SIGSEGV in nmethod::cleanup_inline_caches / CompiledIC::verify
never
parents: 2482
diff changeset
321 }
f52ed367b66d 6996747: SIGSEGV in nmethod::cleanup_inline_caches / CompiledIC::verify
never
parents: 2482
diff changeset
322 };
f52ed367b66d 6996747: SIGSEGV in nmethod::cleanup_inline_caches / CompiledIC::verify
never
parents: 2482
diff changeset
323
0
a61af66fc99e Initial load
duke
parents:
diff changeset
324
a61af66fc99e Initial load
duke
parents:
diff changeset
325 void NMethodSweeper::process_nmethod(nmethod *nm) {
1538
bfe29ec02863 6950075: nmethod sweeper should operate concurrently
never
parents: 1202
diff changeset
326 assert(!CodeCache_lock->owned_by_self(), "just checking");
bfe29ec02863 6950075: nmethod sweeper should operate concurrently
never
parents: 1202
diff changeset
327
3384
f52ed367b66d 6996747: SIGSEGV in nmethod::cleanup_inline_caches / CompiledIC::verify
never
parents: 2482
diff changeset
328 // 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
329 // since the locks acquired below might safepoint.
f52ed367b66d 6996747: SIGSEGV in nmethod::cleanup_inline_caches / CompiledIC::verify
never
parents: 2482
diff changeset
330 NMethodMarker nmm(nm);
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 SWEEP(nm);
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 // Skip methods that are currently referenced by the VM
a61af66fc99e Initial load
duke
parents:
diff changeset
335 if (nm->is_locked_by_vm()) {
a61af66fc99e Initial load
duke
parents:
diff changeset
336 // But still remember to clean-up inline caches for alive nmethods
a61af66fc99e Initial load
duke
parents:
diff changeset
337 if (nm->is_alive()) {
a61af66fc99e Initial load
duke
parents:
diff changeset
338 // 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
339 MutexLocker cl(CompiledIC_lock);
0
a61af66fc99e Initial load
duke
parents:
diff changeset
340 nm->cleanup_inline_caches();
3384
f52ed367b66d 6996747: SIGSEGV in nmethod::cleanup_inline_caches / CompiledIC::verify
never
parents: 2482
diff changeset
341 SWEEP(nm);
0
a61af66fc99e Initial load
duke
parents:
diff changeset
342 } else {
a61af66fc99e Initial load
duke
parents:
diff changeset
343 _locked_seen++;
3384
f52ed367b66d 6996747: SIGSEGV in nmethod::cleanup_inline_caches / CompiledIC::verify
never
parents: 2482
diff changeset
344 SWEEP(nm);
0
a61af66fc99e Initial load
duke
parents:
diff changeset
345 }
a61af66fc99e Initial load
duke
parents:
diff changeset
346 return;
a61af66fc99e Initial load
duke
parents:
diff changeset
347 }
a61af66fc99e Initial load
duke
parents:
diff changeset
348
a61af66fc99e Initial load
duke
parents:
diff changeset
349 if (nm->is_zombie()) {
a61af66fc99e Initial load
duke
parents:
diff changeset
350 // If it is first time, we see nmethod then we mark it. Otherwise,
a61af66fc99e Initial load
duke
parents:
diff changeset
351 // 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
352 // there are no inline caches that refer to it.
0
a61af66fc99e Initial load
duke
parents:
diff changeset
353 if (nm->is_marked_for_reclamation()) {
a61af66fc99e Initial load
duke
parents:
diff changeset
354 assert(!nm->is_locked_by_vm(), "must not flush locked nmethods");
941
8b46c4d82093 4957990: Perm heap bloat in JVM
ysr
parents: 0
diff changeset
355 if (PrintMethodFlushing && Verbose) {
1202
5f24d0319e54 4360113: Evict nmethods when code cache gets full
kvn
parents: 1000
diff changeset
356 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
357 }
1538
bfe29ec02863 6950075: nmethod sweeper should operate concurrently
never
parents: 1202
diff changeset
358 MutexLockerEx mu(CodeCache_lock, Mutex::_no_safepoint_check_flag);
0
a61af66fc99e Initial load
duke
parents:
diff changeset
359 nm->flush();
a61af66fc99e Initial load
duke
parents:
diff changeset
360 } else {
941
8b46c4d82093 4957990: Perm heap bloat in JVM
ysr
parents: 0
diff changeset
361 if (PrintMethodFlushing && Verbose) {
1202
5f24d0319e54 4360113: Evict nmethods when code cache gets full
kvn
parents: 1000
diff changeset
362 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
363 }
0
a61af66fc99e Initial load
duke
parents:
diff changeset
364 nm->mark_for_reclamation();
a61af66fc99e Initial load
duke
parents:
diff changeset
365 _rescan = true;
3384
f52ed367b66d 6996747: SIGSEGV in nmethod::cleanup_inline_caches / CompiledIC::verify
never
parents: 2482
diff changeset
366 SWEEP(nm);
0
a61af66fc99e Initial load
duke
parents:
diff changeset
367 }
a61af66fc99e Initial load
duke
parents:
diff changeset
368 } else if (nm->is_not_entrant()) {
a61af66fc99e Initial load
duke
parents:
diff changeset
369 // If there is no current activations of this method on the
a61af66fc99e Initial load
duke
parents:
diff changeset
370 // stack we can safely convert it to a zombie method
a61af66fc99e Initial load
duke
parents:
diff changeset
371 if (nm->can_not_entrant_be_converted()) {
941
8b46c4d82093 4957990: Perm heap bloat in JVM
ysr
parents: 0
diff changeset
372 if (PrintMethodFlushing && Verbose) {
1202
5f24d0319e54 4360113: Evict nmethods when code cache gets full
kvn
parents: 1000
diff changeset
373 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
374 }
0
a61af66fc99e Initial load
duke
parents:
diff changeset
375 nm->make_zombie();
a61af66fc99e Initial load
duke
parents:
diff changeset
376 _rescan = true;
3384
f52ed367b66d 6996747: SIGSEGV in nmethod::cleanup_inline_caches / CompiledIC::verify
never
parents: 2482
diff changeset
377 SWEEP(nm);
0
a61af66fc99e Initial load
duke
parents:
diff changeset
378 } else {
a61af66fc99e Initial load
duke
parents:
diff changeset
379 // Still alive, clean up its inline caches
1538
bfe29ec02863 6950075: nmethod sweeper should operate concurrently
never
parents: 1202
diff changeset
380 MutexLocker cl(CompiledIC_lock);
0
a61af66fc99e Initial load
duke
parents:
diff changeset
381 nm->cleanup_inline_caches();
a61af66fc99e Initial load
duke
parents:
diff changeset
382 // we coudn't transition this nmethod so don't immediately
a61af66fc99e Initial load
duke
parents:
diff changeset
383 // 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
384 // long time we don't want to keep rescanning the code cache.
0
a61af66fc99e Initial load
duke
parents:
diff changeset
385 _not_entrant_seen_on_stack++;
3384
f52ed367b66d 6996747: SIGSEGV in nmethod::cleanup_inline_caches / CompiledIC::verify
never
parents: 2482
diff changeset
386 SWEEP(nm);
0
a61af66fc99e Initial load
duke
parents:
diff changeset
387 }
a61af66fc99e Initial load
duke
parents:
diff changeset
388 } else if (nm->is_unloaded()) {
a61af66fc99e Initial load
duke
parents:
diff changeset
389 // Unloaded code, just make it a zombie
941
8b46c4d82093 4957990: Perm heap bloat in JVM
ysr
parents: 0
diff changeset
390 if (PrintMethodFlushing && Verbose)
1202
5f24d0319e54 4360113: Evict nmethods when code cache gets full
kvn
parents: 1000
diff changeset
391 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
392 if (nm->is_osr_method()) {
0
a61af66fc99e Initial load
duke
parents:
diff changeset
393 // 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
394 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
395 SWEEP(nm);
0
a61af66fc99e Initial load
duke
parents:
diff changeset
396 nm->flush();
a61af66fc99e Initial load
duke
parents:
diff changeset
397 } else {
a61af66fc99e Initial load
duke
parents:
diff changeset
398 nm->make_zombie();
a61af66fc99e Initial load
duke
parents:
diff changeset
399 _rescan = true;
3384
f52ed367b66d 6996747: SIGSEGV in nmethod::cleanup_inline_caches / CompiledIC::verify
never
parents: 2482
diff changeset
400 SWEEP(nm);
0
a61af66fc99e Initial load
duke
parents:
diff changeset
401 }
a61af66fc99e Initial load
duke
parents:
diff changeset
402 } else {
a61af66fc99e Initial load
duke
parents:
diff changeset
403 assert(nm->is_alive(), "should be alive");
1202
5f24d0319e54 4360113: Evict nmethods when code cache gets full
kvn
parents: 1000
diff changeset
404
5f24d0319e54 4360113: Evict nmethods when code cache gets full
kvn
parents: 1000
diff changeset
405 if (UseCodeCacheFlushing) {
5f24d0319e54 4360113: Evict nmethods when code cache gets full
kvn
parents: 1000
diff changeset
406 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
407 (_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
408 CodeCache::needs_flushing()) {
5f24d0319e54 4360113: Evict nmethods when code cache gets full
kvn
parents: 1000
diff changeset
409 // 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
410 nm->make_not_entrant();
5f24d0319e54 4360113: Evict nmethods when code cache gets full
kvn
parents: 1000
diff changeset
411 }
5f24d0319e54 4360113: Evict nmethods when code cache gets full
kvn
parents: 1000
diff changeset
412 }
5f24d0319e54 4360113: Evict nmethods when code cache gets full
kvn
parents: 1000
diff changeset
413
0
a61af66fc99e Initial load
duke
parents:
diff changeset
414 // 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
415 MutexLocker cl(CompiledIC_lock);
0
a61af66fc99e Initial load
duke
parents:
diff changeset
416 nm->cleanup_inline_caches();
3384
f52ed367b66d 6996747: SIGSEGV in nmethod::cleanup_inline_caches / CompiledIC::verify
never
parents: 2482
diff changeset
417 SWEEP(nm);
0
a61af66fc99e Initial load
duke
parents:
diff changeset
418 }
a61af66fc99e Initial load
duke
parents:
diff changeset
419 }
1202
5f24d0319e54 4360113: Evict nmethods when code cache gets full
kvn
parents: 1000
diff changeset
420
5f24d0319e54 4360113: Evict nmethods when code cache gets full
kvn
parents: 1000
diff changeset
421 // 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
422 // 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
423 // 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
424 // saving the old code in a list in the CodeCache. Then
1538
bfe29ec02863 6950075: nmethod sweeper should operate concurrently
never
parents: 1202
diff changeset
425 // 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
426 // 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
427 // 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
428 // _code field is restored and the methodOop/nmethod
5f24d0319e54 4360113: Evict nmethods when code cache gets full
kvn
parents: 1000
diff changeset
429 // go back to their normal state.
5f24d0319e54 4360113: Evict nmethods when code cache gets full
kvn
parents: 1000
diff changeset
430 void NMethodSweeper::handle_full_code_cache(bool is_full) {
5f24d0319e54 4360113: Evict nmethods when code cache gets full
kvn
parents: 1000
diff changeset
431 // 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
432 if (!is_full){
5f24d0319e54 4360113: Evict nmethods when code cache gets full
kvn
parents: 1000
diff changeset
433 jint old = Atomic::cmpxchg( 1, &_advise_to_sweep, 0 );
5f24d0319e54 4360113: Evict nmethods when code cache gets full
kvn
parents: 1000
diff changeset
434 if (old != 0) {
5f24d0319e54 4360113: Evict nmethods when code cache gets full
kvn
parents: 1000
diff changeset
435 return;
5f24d0319e54 4360113: Evict nmethods when code cache gets full
kvn
parents: 1000
diff changeset
436 }
5f24d0319e54 4360113: Evict nmethods when code cache gets full
kvn
parents: 1000
diff changeset
437 }
5f24d0319e54 4360113: Evict nmethods when code cache gets full
kvn
parents: 1000
diff changeset
438
5f24d0319e54 4360113: Evict nmethods when code cache gets full
kvn
parents: 1000
diff changeset
439 if (is_full) {
5f24d0319e54 4360113: Evict nmethods when code cache gets full
kvn
parents: 1000
diff changeset
440 // Since code cache is full, immediately stop new compiles
5f24d0319e54 4360113: Evict nmethods when code cache gets full
kvn
parents: 1000
diff changeset
441 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
442 if (!did_set) {
5f24d0319e54 4360113: Evict nmethods when code cache gets full
kvn
parents: 1000
diff changeset
443 // only the first to notice can start the cleaning,
5f24d0319e54 4360113: Evict nmethods when code cache gets full
kvn
parents: 1000
diff changeset
444 // others will go back and block
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 set_was_full(true);
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 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
450 jlong now = os::javaTimeMillis();
5f24d0319e54 4360113: Evict nmethods when code cache gets full
kvn
parents: 1000
diff changeset
451 jlong max_interval = (jlong)MinCodeCacheFlushingInterval * (jlong)1000;
5f24d0319e54 4360113: Evict nmethods when code cache gets full
kvn
parents: 1000
diff changeset
452 jlong curr_interval = now - _last_was_full;
5f24d0319e54 4360113: Evict nmethods when code cache gets full
kvn
parents: 1000
diff changeset
453 if (curr_interval < max_interval) {
5f24d0319e54 4360113: Evict nmethods when code cache gets full
kvn
parents: 1000
diff changeset
454 _rescan = true;
1644
2a47bd84841f 6965184: possible races in make_not_entrant_or_zombie
never
parents: 1615
diff changeset
455 log_sweep("disable_compiler", "flushing_interval='" UINT64_FORMAT "'",
2a47bd84841f 6965184: possible races in make_not_entrant_or_zombie
never
parents: 1615
diff changeset
456 curr_interval/1000);
1202
5f24d0319e54 4360113: Evict nmethods when code cache gets full
kvn
parents: 1000
diff changeset
457 return;
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 }
5f24d0319e54 4360113: Evict nmethods when code cache gets full
kvn
parents: 1000
diff changeset
460
5f24d0319e54 4360113: Evict nmethods when code cache gets full
kvn
parents: 1000
diff changeset
461 VM_HandleFullCodeCache op(is_full);
5f24d0319e54 4360113: Evict nmethods when code cache gets full
kvn
parents: 1000
diff changeset
462 VMThread::execute(&op);
5f24d0319e54 4360113: Evict nmethods when code cache gets full
kvn
parents: 1000
diff changeset
463
5f24d0319e54 4360113: Evict nmethods when code cache gets full
kvn
parents: 1000
diff changeset
464 // rescan again as soon as possible
5f24d0319e54 4360113: Evict nmethods when code cache gets full
kvn
parents: 1000
diff changeset
465 _rescan = true;
5f24d0319e54 4360113: Evict nmethods when code cache gets full
kvn
parents: 1000
diff changeset
466 }
5f24d0319e54 4360113: Evict nmethods when code cache gets full
kvn
parents: 1000
diff changeset
467
5f24d0319e54 4360113: Evict nmethods when code cache gets full
kvn
parents: 1000
diff changeset
468 void NMethodSweeper::speculative_disconnect_nmethods(bool is_full) {
5f24d0319e54 4360113: Evict nmethods when code cache gets full
kvn
parents: 1000
diff changeset
469 // 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
470 // 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
471
5f24d0319e54 4360113: Evict nmethods when code cache gets full
kvn
parents: 1000
diff changeset
472 debug_only(jlong start = os::javaTimeMillis();)
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 if ((!was_full()) && (is_full)) {
5f24d0319e54 4360113: Evict nmethods when code cache gets full
kvn
parents: 1000
diff changeset
475 if (!CodeCache::needs_flushing()) {
1644
2a47bd84841f 6965184: possible races in make_not_entrant_or_zombie
never
parents: 1615
diff changeset
476 log_sweep("restart_compiler");
1202
5f24d0319e54 4360113: Evict nmethods when code cache gets full
kvn
parents: 1000
diff changeset
477 CompileBroker::set_should_compile_new_jobs(CompileBroker::run_compilation);
5f24d0319e54 4360113: Evict nmethods when code cache gets full
kvn
parents: 1000
diff changeset
478 return;
5f24d0319e54 4360113: Evict nmethods when code cache gets full
kvn
parents: 1000
diff changeset
479 }
5f24d0319e54 4360113: Evict nmethods when code cache gets full
kvn
parents: 1000
diff changeset
480 }
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 // Traverse the code cache trying to dump the oldest nmethods
5f24d0319e54 4360113: Evict nmethods when code cache gets full
kvn
parents: 1000
diff changeset
483 uint curr_max_comp_id = CompileBroker::get_compilation_id();
5f24d0319e54 4360113: Evict nmethods when code cache gets full
kvn
parents: 1000
diff changeset
484 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
485 log_sweep("start_cleaning");
1202
5f24d0319e54 4360113: Evict nmethods when code cache gets full
kvn
parents: 1000
diff changeset
486
5f24d0319e54 4360113: Evict nmethods when code cache gets full
kvn
parents: 1000
diff changeset
487 nmethod* nm = CodeCache::alive_nmethod(CodeCache::first());
5f24d0319e54 4360113: Evict nmethods when code cache gets full
kvn
parents: 1000
diff changeset
488 jint disconnected = 0;
5f24d0319e54 4360113: Evict nmethods when code cache gets full
kvn
parents: 1000
diff changeset
489 jint made_not_entrant = 0;
5f24d0319e54 4360113: Evict nmethods when code cache gets full
kvn
parents: 1000
diff changeset
490 while ((nm != NULL)){
5f24d0319e54 4360113: Evict nmethods when code cache gets full
kvn
parents: 1000
diff changeset
491 uint curr_comp_id = nm->compile_id();
5f24d0319e54 4360113: Evict nmethods when code cache gets full
kvn
parents: 1000
diff changeset
492
5f24d0319e54 4360113: Evict nmethods when code cache gets full
kvn
parents: 1000
diff changeset
493 // 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
494 // since they are part of the JDK in most cases
5f24d0319e54 4360113: Evict nmethods when code cache gets full
kvn
parents: 1000
diff changeset
495 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
496 (!nm->is_native_method()) && ((curr_comp_id < flush_target))) {
5f24d0319e54 4360113: Evict nmethods when code cache gets full
kvn
parents: 1000
diff changeset
497
5f24d0319e54 4360113: Evict nmethods when code cache gets full
kvn
parents: 1000
diff changeset
498 if ((nm->method()->code() == nm)) {
5f24d0319e54 4360113: Evict nmethods when code cache gets full
kvn
parents: 1000
diff changeset
499 // This method has not been previously considered for
5f24d0319e54 4360113: Evict nmethods when code cache gets full
kvn
parents: 1000
diff changeset
500 // unloading or it was restored already
5f24d0319e54 4360113: Evict nmethods when code cache gets full
kvn
parents: 1000
diff changeset
501 CodeCache::speculatively_disconnect(nm);
5f24d0319e54 4360113: Evict nmethods when code cache gets full
kvn
parents: 1000
diff changeset
502 disconnected++;
5f24d0319e54 4360113: Evict nmethods when code cache gets full
kvn
parents: 1000
diff changeset
503 } else if (nm->is_speculatively_disconnected()) {
5f24d0319e54 4360113: Evict nmethods when code cache gets full
kvn
parents: 1000
diff changeset
504 // This method was previously considered for preemptive unloading and was not called since then
1783
d5d065957597 6953144: Tiered compilation
iveresov
parents: 1646
diff changeset
505 CompilationPolicy::policy()->delay_compilation(nm->method());
1202
5f24d0319e54 4360113: Evict nmethods when code cache gets full
kvn
parents: 1000
diff changeset
506 nm->make_not_entrant();
5f24d0319e54 4360113: Evict nmethods when code cache gets full
kvn
parents: 1000
diff changeset
507 made_not_entrant++;
5f24d0319e54 4360113: Evict nmethods when code cache gets full
kvn
parents: 1000
diff changeset
508 }
5f24d0319e54 4360113: Evict nmethods when code cache gets full
kvn
parents: 1000
diff changeset
509
5f24d0319e54 4360113: Evict nmethods when code cache gets full
kvn
parents: 1000
diff changeset
510 if (curr_comp_id > _highest_marked) {
5f24d0319e54 4360113: Evict nmethods when code cache gets full
kvn
parents: 1000
diff changeset
511 _highest_marked = curr_comp_id;
5f24d0319e54 4360113: Evict nmethods when code cache gets full
kvn
parents: 1000
diff changeset
512 }
5f24d0319e54 4360113: Evict nmethods when code cache gets full
kvn
parents: 1000
diff changeset
513 }
5f24d0319e54 4360113: Evict nmethods when code cache gets full
kvn
parents: 1000
diff changeset
514 nm = CodeCache::alive_nmethod(CodeCache::next(nm));
5f24d0319e54 4360113: Evict nmethods when code cache gets full
kvn
parents: 1000
diff changeset
515 }
5f24d0319e54 4360113: Evict nmethods when code cache gets full
kvn
parents: 1000
diff changeset
516
1644
2a47bd84841f 6965184: possible races in make_not_entrant_or_zombie
never
parents: 1615
diff changeset
517 log_sweep("stop_cleaning",
2a47bd84841f 6965184: possible races in make_not_entrant_or_zombie
never
parents: 1615
diff changeset
518 "disconnected='" UINT32_FORMAT "' made_not_entrant='" UINT32_FORMAT "'",
2a47bd84841f 6965184: possible races in make_not_entrant_or_zombie
never
parents: 1615
diff changeset
519 disconnected, made_not_entrant);
1202
5f24d0319e54 4360113: Evict nmethods when code cache gets full
kvn
parents: 1000
diff changeset
520
1538
bfe29ec02863 6950075: nmethod sweeper should operate concurrently
never
parents: 1202
diff changeset
521 // 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
522 // 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
523 if (was_full()) {
5f24d0319e54 4360113: Evict nmethods when code cache gets full
kvn
parents: 1000
diff changeset
524 _last_was_full = os::javaTimeMillis();
5f24d0319e54 4360113: Evict nmethods when code cache gets full
kvn
parents: 1000
diff changeset
525 CompileBroker::set_should_compile_new_jobs(CompileBroker::stop_compilation);
5f24d0319e54 4360113: Evict nmethods when code cache gets full
kvn
parents: 1000
diff changeset
526 }
5f24d0319e54 4360113: Evict nmethods when code cache gets full
kvn
parents: 1000
diff changeset
527
5f24d0319e54 4360113: Evict nmethods when code cache gets full
kvn
parents: 1000
diff changeset
528 // 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
529 _was_full_traversal = _traversals;
5f24d0319e54 4360113: Evict nmethods when code cache gets full
kvn
parents: 1000
diff changeset
530 #ifdef ASSERT
5f24d0319e54 4360113: Evict nmethods when code cache gets full
kvn
parents: 1000
diff changeset
531 jlong end = os::javaTimeMillis();
5f24d0319e54 4360113: Evict nmethods when code cache gets full
kvn
parents: 1000
diff changeset
532 if(PrintMethodFlushing && Verbose) {
5f24d0319e54 4360113: Evict nmethods when code cache gets full
kvn
parents: 1000
diff changeset
533 tty->print_cr("### sweeper: unload time: " INT64_FORMAT, end-start);
5f24d0319e54 4360113: Evict nmethods when code cache gets full
kvn
parents: 1000
diff changeset
534 }
5f24d0319e54 4360113: Evict nmethods when code cache gets full
kvn
parents: 1000
diff changeset
535 #endif
5f24d0319e54 4360113: Evict nmethods when code cache gets full
kvn
parents: 1000
diff changeset
536 }
1644
2a47bd84841f 6965184: possible races in make_not_entrant_or_zombie
never
parents: 1615
diff changeset
537
2a47bd84841f 6965184: possible races in make_not_entrant_or_zombie
never
parents: 1615
diff changeset
538
2a47bd84841f 6965184: possible races in make_not_entrant_or_zombie
never
parents: 1615
diff changeset
539 // 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
540 // state of the code cache if it's requested.
2a47bd84841f 6965184: possible races in make_not_entrant_or_zombie
never
parents: 1615
diff changeset
541 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
542 if (PrintMethodFlushing) {
2482
dbccacb79c63 7036236: VM crashes assert((!inside_attrs()) || is_error_reported()) failed ...
iveresov
parents: 2426
diff changeset
543 stringStream s;
dbccacb79c63 7036236: VM crashes assert((!inside_attrs()) || is_error_reported()) failed ...
iveresov
parents: 2426
diff changeset
544 // 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
545 // 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
546 CodeCache::log_state(&s);
dbccacb79c63 7036236: VM crashes assert((!inside_attrs()) || is_error_reported()) failed ...
iveresov
parents: 2426
diff changeset
547
1644
2a47bd84841f 6965184: possible races in make_not_entrant_or_zombie
never
parents: 1615
diff changeset
548 ttyLocker ttyl;
2a47bd84841f 6965184: possible races in make_not_entrant_or_zombie
never
parents: 1615
diff changeset
549 tty->print("### sweeper: %s ", msg);
2a47bd84841f 6965184: possible races in make_not_entrant_or_zombie
never
parents: 1615
diff changeset
550 if (format != NULL) {
2a47bd84841f 6965184: possible races in make_not_entrant_or_zombie
never
parents: 1615
diff changeset
551 va_list ap;
2a47bd84841f 6965184: possible races in make_not_entrant_or_zombie
never
parents: 1615
diff changeset
552 va_start(ap, format);
2a47bd84841f 6965184: possible races in make_not_entrant_or_zombie
never
parents: 1615
diff changeset
553 tty->vprint(format, ap);
2a47bd84841f 6965184: possible races in make_not_entrant_or_zombie
never
parents: 1615
diff changeset
554 va_end(ap);
2a47bd84841f 6965184: possible races in make_not_entrant_or_zombie
never
parents: 1615
diff changeset
555 }
2482
dbccacb79c63 7036236: VM crashes assert((!inside_attrs()) || is_error_reported()) failed ...
iveresov
parents: 2426
diff changeset
556 tty->print_cr(s.as_string());
1644
2a47bd84841f 6965184: possible races in make_not_entrant_or_zombie
never
parents: 1615
diff changeset
557 }
2a47bd84841f 6965184: possible races in make_not_entrant_or_zombie
never
parents: 1615
diff changeset
558
2a47bd84841f 6965184: possible races in make_not_entrant_or_zombie
never
parents: 1615
diff changeset
559 if (LogCompilation && (xtty != NULL)) {
2482
dbccacb79c63 7036236: VM crashes assert((!inside_attrs()) || is_error_reported()) failed ...
iveresov
parents: 2426
diff changeset
560 stringStream s;
dbccacb79c63 7036236: VM crashes assert((!inside_attrs()) || is_error_reported()) failed ...
iveresov
parents: 2426
diff changeset
561 // 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
562 // 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
563 CodeCache::log_state(&s);
dbccacb79c63 7036236: VM crashes assert((!inside_attrs()) || is_error_reported()) failed ...
iveresov
parents: 2426
diff changeset
564
1644
2a47bd84841f 6965184: possible races in make_not_entrant_or_zombie
never
parents: 1615
diff changeset
565 ttyLocker ttyl;
1646
8d5934a77f10 6968385: malformed xml in sweeper logging
never
parents: 1644
diff changeset
566 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
567 if (format != NULL) {
2a47bd84841f 6965184: possible races in make_not_entrant_or_zombie
never
parents: 1615
diff changeset
568 va_list ap;
2a47bd84841f 6965184: possible races in make_not_entrant_or_zombie
never
parents: 1615
diff changeset
569 va_start(ap, format);
2a47bd84841f 6965184: possible races in make_not_entrant_or_zombie
never
parents: 1615
diff changeset
570 xtty->vprint(format, ap);
2a47bd84841f 6965184: possible races in make_not_entrant_or_zombie
never
parents: 1615
diff changeset
571 va_end(ap);
2a47bd84841f 6965184: possible races in make_not_entrant_or_zombie
never
parents: 1615
diff changeset
572 }
2482
dbccacb79c63 7036236: VM crashes assert((!inside_attrs()) || is_error_reported()) failed ...
iveresov
parents: 2426
diff changeset
573 xtty->print(s.as_string());
1644
2a47bd84841f 6965184: possible races in make_not_entrant_or_zombie
never
parents: 1615
diff changeset
574 xtty->stamp();
2a47bd84841f 6965184: possible races in make_not_entrant_or_zombie
never
parents: 1615
diff changeset
575 xtty->end_elem();
2a47bd84841f 6965184: possible races in make_not_entrant_or_zombie
never
parents: 1615
diff changeset
576 }
2a47bd84841f 6965184: possible races in make_not_entrant_or_zombie
never
parents: 1615
diff changeset
577 }