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annotate src/share/vm/runtime/dtraceJSDT.cpp @ 18096:ca6d25be853b jdk8u25-b13

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8044269: Analysis of archive files. Summary: Add checksum verification. Reviewed-by: iklam, dholmes, mschoene
author jiangli
date Tue, 12 Aug 2014 17:46:16 -0400
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