1 /*
2 * Copyright (c) 2012, 2018, Oracle and/or its affiliates. All rights reserved.
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 *
19 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
20 * or visit www.oracle.com if you need additional information or have any
21 * questions.
22 *
23 */
24 #include "precompiled.hpp"
25 #include "jvm.h"
26
27 #include "runtime/orderAccess.hpp"
28 #include "runtime/vmThread.hpp"
29 #include "runtime/vmOperations.hpp"
30 #include "services/memBaseline.hpp"
31 #include "services/memReporter.hpp"
32 #include "services/mallocTracker.inline.hpp"
33 #include "services/memTracker.hpp"
34 #include "utilities/debug.hpp"
35 #include "utilities/defaultStream.hpp"
36 #include "utilities/vmError.hpp"
37
38 #ifdef _WINDOWS
39 #include <windows.h>
40 #endif
41
42 #ifdef SOLARIS
43 volatile bool NMT_stack_walkable = false;
44 #else
45 volatile bool NMT_stack_walkable = true;
46 #endif
47
48 volatile NMT_TrackingLevel MemTracker::_tracking_level = NMT_unknown;
49 NMT_TrackingLevel MemTracker::_cmdline_tracking_level = NMT_unknown;
50
51 MemBaseline MemTracker::_baseline;
52 bool MemTracker::_is_nmt_env_valid = true;
53
75 } else if (strcmp(nmt_env_value, "detail") == 0) {
76 level = NMT_detail;
77 } else if (strcmp(nmt_env_value, "off") != 0) {
78 // The value of the environment variable is invalid
79 _is_nmt_env_valid = false;
80 }
81 // Remove the environment variable to avoid leaking to child processes
82 os::unsetenv(nmt_env_variable);
83 }
84
85 if (!MallocTracker::initialize(level) ||
86 !VirtualMemoryTracker::initialize(level)) {
87 level = NMT_off;
88 }
89 return level;
90 }
91
92 void MemTracker::init() {
93 NMT_TrackingLevel level = tracking_level();
94 if (level >= NMT_summary) {
95 if (!VirtualMemoryTracker::late_initialize(level)) {
96 shutdown();
97 return;
98 }
99 }
100 }
101
102 bool MemTracker::check_launcher_nmt_support(const char* value) {
103 if (strcmp(value, "=detail") == 0) {
104 if (MemTracker::tracking_level() != NMT_detail) {
105 return false;
106 }
107 } else if (strcmp(value, "=summary") == 0) {
108 if (MemTracker::tracking_level() != NMT_summary) {
109 return false;
110 }
111 } else if (strcmp(value, "=off") == 0) {
112 if (MemTracker::tracking_level() != NMT_off) {
113 return false;
114 }
115 } else {
147 // We can only shutdown NMT to minimal tracking level if it is ever on.
148 if (tracking_level () > NMT_minimal) {
149 transition_to(NMT_minimal);
150 }
151 }
152
153 bool MemTracker::transition_to(NMT_TrackingLevel level) {
154 NMT_TrackingLevel current_level = tracking_level();
155
156 assert(level != NMT_off || current_level == NMT_off, "Cannot transition NMT to off");
157
158 if (current_level == level) {
159 return true;
160 } else if (current_level > level) {
161 // Downgrade tracking level, we want to lower the tracking level first
162 _tracking_level = level;
163 // Make _tracking_level visible immediately.
164 OrderAccess::fence();
165 VirtualMemoryTracker::transition(current_level, level);
166 MallocTracker::transition(current_level, level);
167 } else {
168 // Upgrading tracking level is not supported and has never been supported.
169 // Allocating and deallocating malloc tracking structures is not thread safe and
170 // leads to inconsistencies unless a lot coarser locks are added.
171 }
172 return true;
173 }
174
175 void MemTracker::report(bool summary_only, outputStream* output) {
176 assert(output != NULL, "No output stream");
177 MemBaseline baseline;
178 if (baseline.baseline(summary_only)) {
179 if (summary_only) {
180 MemSummaryReporter rpt(baseline, output);
181 rpt.report();
182 } else {
183 MemDetailReporter rpt(baseline, output);
184 rpt.report();
185 output->print("Metaspace:");
186 // Metadata reporting requires a safepoint, so avoid it if VM is not in good state.
|
1 /*
2 * Copyright (c) 2012, 2019, Oracle and/or its affiliates. All rights reserved.
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 *
19 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
20 * or visit www.oracle.com if you need additional information or have any
21 * questions.
22 *
23 */
24 #include "precompiled.hpp"
25 #include "jvm.h"
26
27 #include "runtime/orderAccess.hpp"
28 #include "runtime/vmThread.hpp"
29 #include "runtime/vmOperations.hpp"
30 #include "services/memBaseline.hpp"
31 #include "services/memReporter.hpp"
32 #include "services/mallocTracker.inline.hpp"
33 #include "services/memTracker.hpp"
34 #include "services/threadStackTracker.hpp"
35 #include "utilities/debug.hpp"
36 #include "utilities/defaultStream.hpp"
37 #include "utilities/vmError.hpp"
38
39 #ifdef _WINDOWS
40 #include <windows.h>
41 #endif
42
43 #ifdef SOLARIS
44 volatile bool NMT_stack_walkable = false;
45 #else
46 volatile bool NMT_stack_walkable = true;
47 #endif
48
49 volatile NMT_TrackingLevel MemTracker::_tracking_level = NMT_unknown;
50 NMT_TrackingLevel MemTracker::_cmdline_tracking_level = NMT_unknown;
51
52 MemBaseline MemTracker::_baseline;
53 bool MemTracker::_is_nmt_env_valid = true;
54
76 } else if (strcmp(nmt_env_value, "detail") == 0) {
77 level = NMT_detail;
78 } else if (strcmp(nmt_env_value, "off") != 0) {
79 // The value of the environment variable is invalid
80 _is_nmt_env_valid = false;
81 }
82 // Remove the environment variable to avoid leaking to child processes
83 os::unsetenv(nmt_env_variable);
84 }
85
86 if (!MallocTracker::initialize(level) ||
87 !VirtualMemoryTracker::initialize(level)) {
88 level = NMT_off;
89 }
90 return level;
91 }
92
93 void MemTracker::init() {
94 NMT_TrackingLevel level = tracking_level();
95 if (level >= NMT_summary) {
96 if (!VirtualMemoryTracker::late_initialize(level) ||
97 !ThreadStackTracker::late_initialize(level)) {
98 shutdown();
99 return;
100 }
101 }
102 }
103
104 bool MemTracker::check_launcher_nmt_support(const char* value) {
105 if (strcmp(value, "=detail") == 0) {
106 if (MemTracker::tracking_level() != NMT_detail) {
107 return false;
108 }
109 } else if (strcmp(value, "=summary") == 0) {
110 if (MemTracker::tracking_level() != NMT_summary) {
111 return false;
112 }
113 } else if (strcmp(value, "=off") == 0) {
114 if (MemTracker::tracking_level() != NMT_off) {
115 return false;
116 }
117 } else {
149 // We can only shutdown NMT to minimal tracking level if it is ever on.
150 if (tracking_level () > NMT_minimal) {
151 transition_to(NMT_minimal);
152 }
153 }
154
155 bool MemTracker::transition_to(NMT_TrackingLevel level) {
156 NMT_TrackingLevel current_level = tracking_level();
157
158 assert(level != NMT_off || current_level == NMT_off, "Cannot transition NMT to off");
159
160 if (current_level == level) {
161 return true;
162 } else if (current_level > level) {
163 // Downgrade tracking level, we want to lower the tracking level first
164 _tracking_level = level;
165 // Make _tracking_level visible immediately.
166 OrderAccess::fence();
167 VirtualMemoryTracker::transition(current_level, level);
168 MallocTracker::transition(current_level, level);
169 ThreadStackTracker::transition(current_level, level);
170 } else {
171 // Upgrading tracking level is not supported and has never been supported.
172 // Allocating and deallocating malloc tracking structures is not thread safe and
173 // leads to inconsistencies unless a lot coarser locks are added.
174 }
175 return true;
176 }
177
178 void MemTracker::report(bool summary_only, outputStream* output) {
179 assert(output != NULL, "No output stream");
180 MemBaseline baseline;
181 if (baseline.baseline(summary_only)) {
182 if (summary_only) {
183 MemSummaryReporter rpt(baseline, output);
184 rpt.report();
185 } else {
186 MemDetailReporter rpt(baseline, output);
187 rpt.report();
188 output->print("Metaspace:");
189 // Metadata reporting requires a safepoint, so avoid it if VM is not in good state.
|