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annotate src/share/vm/runtime/dtraceJSDT.cpp @ 10246:194f52aa2f23

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7176479: G1: JVM crashes on T5-8 system with 1.5 TB heap Summary: Refactor G1's hot card cache and card counts table into their own files. Simplify the card counts table, including removing the encoding of the card index in each entry. The card counts table now has a 1:1 correspondence with the cards spanned by heap. Space for the card counts table is reserved from virtual memory (rather than C heap) during JVM startup and is committed/expanded when the heap is expanded. Changes were also reviewed-by Vitaly Davidovich. Reviewed-by: tschatzl, jmasa
author johnc
date Thu, 09 May 2013 11:16:39 -0700
parents da91efe96a93
children
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1 /*
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2 * Copyright (c) 1997, 2012, Oracle and/or its affiliates. All rights reserved.
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3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
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4 *
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5 * This code is free software; you can redistribute it and/or modify it
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6 * under the terms of the GNU General Public License version 2 only, as
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7 * published by the Free Software Foundation.
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8 *
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9 * This code is distributed in the hope that it will be useful, but WITHOUT
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10 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
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11 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
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12 * version 2 for more details (a copy is included in the LICENSE file that
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13 * accompanied this code).
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14 *
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15 * You should have received a copy of the GNU General Public License version
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16 * 2 along with this work; if not, write to the Free Software Foundation,
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17 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
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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.
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22 *
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23 */
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24
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25 #include "precompiled.hpp"
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26 #include "classfile/javaClasses.hpp"
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27 #include "code/codeBlob.hpp"
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28 #include "memory/allocation.hpp"
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29 #include "prims/jvm.h"
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30 #include "runtime/dtraceJSDT.hpp"
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31 #include "runtime/jniHandles.hpp"
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32 #include "runtime/os.hpp"
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33 #include "utilities/exceptions.hpp"
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34 #include "utilities/globalDefinitions.hpp"
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35 #include "utilities/utf8.hpp"
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36
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37 #ifdef HAVE_DTRACE_H
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38
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39 jlong DTraceJSDT::activate(
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40 jint version, jstring module_name, jint providers_count,
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41 JVM_DTraceProvider* providers, TRAPS) {
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42
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43 size_t count = 0;
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44 RegisteredProbes* probes = NULL;
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45
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46 if (!is_supported()) {
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47 return 0;
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48 }
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49
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50 assert(module_name != NULL, "valid module name");
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51 assert(providers != NULL, "valid provider array");
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52
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53 for (int i = 0; i < providers_count; ++i) {
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54 count += providers[i].probe_count;
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55 }
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56 probes = new RegisteredProbes(count);
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57 count = 0;
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58
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59 for (int i = 0; i < providers_count; ++i) {
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60 assert(providers[i].name != NULL, "valid provider name");
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61 assert(providers[i].probe_count == 0 || providers[i].probes != NULL,
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62 "valid probe count");
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63 for (int j = 0; j < providers[i].probe_count; ++j) {
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64 JVM_DTraceProbe* probe = &(providers[i].probes[j]);
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65 assert(probe != NULL, "valid probe");
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66 assert(probe->method != NULL, "valid method");
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67 assert(probe->name != NULL, "valid probe name");
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68 assert(probe->function != NULL, "valid probe function spec");
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69 methodHandle h_method =
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70 methodHandle(THREAD, Method::resolve_jmethod_id(probe->method));
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71 nmethod* nm = AdapterHandlerLibrary::create_dtrace_nmethod(h_method);
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72 if (nm == NULL) {
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73 delete probes;
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74 THROW_MSG_0(vmSymbols::java_lang_RuntimeException(),
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75 "Unable to register DTrace probes (CodeCache: no room for DTrace nmethods).");
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76 }
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77 h_method()->set_not_compilable();
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78 h_method()->set_code(h_method, nm);
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79 probes->nmethod_at_put(count++, nm);
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80 }
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81 }
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82
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83 int handle = pd_activate((void*)probes,
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84 module_name, providers_count, providers);
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85 if (handle < 0) {
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86 delete probes;
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87 THROW_MSG_0(vmSymbols::java_lang_RuntimeException(),
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88 "Unable to register DTrace probes (internal error).");
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89 }
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90 probes->set_helper_handle(handle);
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91 return RegisteredProbes::toOpaqueProbes(probes);
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92 }
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93
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94 jboolean DTraceJSDT::is_probe_enabled(jmethodID method) {
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95 Method* m = Method::resolve_jmethod_id(method);
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96 return nativeInstruction_at(m->code()->trap_address())->is_dtrace_trap();
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97 }
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98
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99 void DTraceJSDT::dispose(OpaqueProbes probes) {
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100 RegisteredProbes* p = RegisteredProbes::toRegisteredProbes(probes);
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101 if (probes != -1 && p != NULL) {
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102 pd_dispose(p->helper_handle());
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103 delete p;
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104 }
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105 }
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106
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107 jboolean DTraceJSDT::is_supported() {
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108 return pd_is_supported();
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109 }
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110
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111 #else // HAVE_DTRACE_H
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112
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113 jlong DTraceJSDT::activate(
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114 jint version, jstring module_name, jint providers_count,
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115 JVM_DTraceProvider* providers, TRAPS) {
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116 return 0;
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117 }
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118
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119 jboolean DTraceJSDT::is_probe_enabled(jmethodID method) {
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120 return false;
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121 }
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122
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123 void DTraceJSDT::dispose(OpaqueProbes probes) {
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124 return;
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125 }
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126
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127 jboolean DTraceJSDT::is_supported() {
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128 return false;
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129 }
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130
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131 #endif // ndef HAVE_DTRACE_H