Mercurial > hg > graal-compiler
annotate src/share/vm/services/dtraceAttacher.cpp @ 20762:c2844108a708
Merge
author | asaha |
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date | Thu, 23 Oct 2014 12:02:08 -0700 |
parents | 55fb97c4c58d |
children | 4ca6dc0799b6 |
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0 | 1 /* |
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2 * Copyright (c) 2006, 2013, Oracle and/or its affiliates. All rights reserved. |
0 | 3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. |
4 * | |
5 * This code is free software; you can redistribute it and/or modify it | |
6 * under the terms of the GNU General Public License version 2 only, as | |
7 * published by the Free Software Foundation. | |
8 * | |
9 * This code is distributed in the hope that it will be useful, but WITHOUT | |
10 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or | |
11 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License | |
12 * version 2 for more details (a copy is included in the LICENSE file that | |
13 * accompanied this code). | |
14 * | |
15 * You should have received a copy of the GNU General Public License version | |
16 * 2 along with this work; if not, write to the Free Software Foundation, | |
17 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. | |
18 * | |
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19 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA |
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20 * or visit www.oracle.com if you need additional information or have any |
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21 * questions. |
0 | 22 * |
23 */ | |
24 | |
1972 | 25 #include "precompiled.hpp" |
26 #include "code/codeCache.hpp" | |
27 #include "memory/resourceArea.hpp" | |
28 #include "runtime/deoptimization.hpp" | |
29 #include "runtime/vmThread.hpp" | |
30 #include "runtime/vm_operations.hpp" | |
31 #include "services/dtraceAttacher.hpp" | |
0 | 32 |
33 #ifdef SOLARIS | |
34 | |
35 class VM_DeoptimizeTheWorld : public VM_Operation { | |
36 public: | |
37 VMOp_Type type() const { | |
38 return VMOp_DeoptimizeTheWorld; | |
39 } | |
40 void doit() { | |
41 CodeCache::mark_all_nmethods_for_deoptimization(); | |
42 ResourceMark rm; | |
43 DeoptimizationMarker dm; | |
44 // Deoptimize all activations depending on marked methods | |
45 Deoptimization::deoptimize_dependents(); | |
46 | |
47 // Mark the dependent methods non entrant | |
48 CodeCache::make_marked_nmethods_not_entrant(); | |
49 } | |
50 }; | |
51 | |
52 static void set_bool_flag(const char* flag, bool value) { | |
53 CommandLineFlags::boolAtPut((char*)flag, strlen(flag), &value, | |
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54 Flag::ATTACH_ON_DEMAND); |
0 | 55 } |
56 | |
57 // Enable only the "fine grained" flags. Do *not* touch | |
58 // the overall "ExtendedDTraceProbes" flag. | |
59 void DTrace::enable_dprobes(int probes) { | |
60 bool changed = false; | |
61 if (!DTraceAllocProbes && (probes & DTRACE_ALLOC_PROBES)) { | |
62 set_bool_flag("DTraceAllocProbes", true); | |
63 changed = true; | |
64 } | |
65 if (!DTraceMethodProbes && (probes & DTRACE_METHOD_PROBES)) { | |
66 set_bool_flag("DTraceMethodProbes", true); | |
67 changed = true; | |
68 } | |
69 if (!DTraceMonitorProbes && (probes & DTRACE_MONITOR_PROBES)) { | |
70 set_bool_flag("DTraceMonitorProbes", true); | |
71 changed = true; | |
72 } | |
73 | |
74 if (changed) { | |
75 // one or more flags changed, need to deoptimize | |
76 VM_DeoptimizeTheWorld op; | |
77 VMThread::execute(&op); | |
78 } | |
79 } | |
80 | |
81 // Disable only the "fine grained" flags. Do *not* touch | |
82 // the overall "ExtendedDTraceProbes" flag. | |
83 void DTrace::disable_dprobes(int probes) { | |
84 bool changed = false; | |
85 if (DTraceAllocProbes && (probes & DTRACE_ALLOC_PROBES)) { | |
86 set_bool_flag("DTraceAllocProbes", false); | |
87 changed = true; | |
88 } | |
89 if (DTraceMethodProbes && (probes & DTRACE_METHOD_PROBES)) { | |
90 set_bool_flag("DTraceMethodProbes", false); | |
91 changed = true; | |
92 } | |
93 if (DTraceMonitorProbes && (probes & DTRACE_MONITOR_PROBES)) { | |
94 set_bool_flag("DTraceMonitorProbes", false); | |
95 changed = true; | |
96 } | |
97 if (changed) { | |
98 // one or more flags changed, need to deoptimize | |
99 VM_DeoptimizeTheWorld op; | |
100 VMThread::execute(&op); | |
101 } | |
102 } | |
103 | |
104 // Do clean-up on "all door clients detached" event. | |
105 void DTrace::detach_all_clients() { | |
106 /* | |
107 * We restore the state of the fine grained flags | |
108 * to be consistent with overall ExtendedDTraceProbes. | |
109 * This way, we will honour command line setting or the | |
110 * last explicit modification of ExtendedDTraceProbes by | |
111 * a call to set_extended_dprobes. | |
112 */ | |
113 if (ExtendedDTraceProbes) { | |
114 enable_dprobes(DTRACE_ALL_PROBES); | |
115 } else { | |
116 disable_dprobes(DTRACE_ALL_PROBES); | |
117 } | |
118 } | |
119 | |
120 void DTrace::set_extended_dprobes(bool flag) { | |
121 // explicit setting of ExtendedDTraceProbes flag | |
122 set_bool_flag("ExtendedDTraceProbes", flag); | |
123 | |
124 // make sure that the fine grained flags reflect the change. | |
125 if (flag) { | |
126 enable_dprobes(DTRACE_ALL_PROBES); | |
127 } else { | |
128 /* | |
129 * FIXME: Revisit this: currently all-client-detach detection | |
130 * does not work and hence disabled. The following scheme does | |
131 * not work. So, we have to disable fine-grained flags here. | |
132 * | |
133 * disable_dprobes call has to be delayed till next "detach all "event. | |
134 * This is to be done so that concurrent DTrace clients that may | |
135 * have enabled one or more fine grained dprobes and may be running | |
136 * still. On "detach all" clients event, we would sync ExtendedDTraceProbes | |
137 * with fine grained flags which would take care of disabling fine grained flags. | |
138 */ | |
139 disable_dprobes(DTRACE_ALL_PROBES); | |
140 } | |
141 } | |
142 | |
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143 void DTrace::set_monitor_dprobes(bool flag) { |
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144 // explicit setting of DTraceMonitorProbes flag |
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145 set_bool_flag("DTraceMonitorProbes", flag); |
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146 } |
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147 |
0 | 148 #endif /* SOLARIS */ |