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comparison: src/share/vm/runtime/dtraceJSDT.cpp
src/share/vm/runtime/dtraceJSDT.cpp
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| 1 /* | |
| 2 * Copyright (c) 1997, 2012, 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 | |
| 25 #include "precompiled.hpp" | |
| 26 #include "classfile/javaClasses.hpp" | |
| 27 #include "code/codeBlob.hpp" | |
| 28 #include "memory/allocation.hpp" | |
| 29 #include "prims/jvm.h" | |
| 30 #include "runtime/dtraceJSDT.hpp" | |
| 31 #include "runtime/jniHandles.hpp" | |
| 32 #include "runtime/os.hpp" | |
| 33 #include "utilities/exceptions.hpp" | |
| 34 #include "utilities/globalDefinitions.hpp" | |
| 35 #include "utilities/utf8.hpp" | |
| 36 | |
| 37 #ifdef HAVE_DTRACE_H | |
| 38 | |
| 39 jlong DTraceJSDT::activate( | |
| 40 jint version, jstring module_name, jint providers_count, | |
| 41 JVM_DTraceProvider* providers, TRAPS) { | |
| 42 | |
| 43 size_t count = 0; | |
| 44 RegisteredProbes* probes = NULL; | |
| 45 | |
| 46 if (!is_supported()) { | |
| 47 return 0; | |
| 48 } | |
| 49 | |
| 50 assert(module_name != NULL, "valid module name"); | |
| 51 assert(providers != NULL, "valid provider array"); | |
| 52 | |
| 53 for (int i = 0; i < providers_count; ++i) { | |
| 54 count += providers[i].probe_count; | |
| 55 } | |
| 56 probes = new RegisteredProbes(count); | |
| 57 count = 0; | |
| 58 | |
| 59 for (int i = 0; i < providers_count; ++i) { | |
| 60 assert(providers[i].name != NULL, "valid provider name"); | |
| 61 assert(providers[i].probe_count == 0 || providers[i].probes != NULL, | |
| 62 "valid probe count"); | |
| 63 for (int j = 0; j < providers[i].probe_count; ++j) { | |
| 64 JVM_DTraceProbe* probe = &(providers[i].probes[j]); | |
| 65 assert(probe != NULL, "valid probe"); | |
| 66 assert(probe->method != NULL, "valid method"); | |
| 67 assert(probe->name != NULL, "valid probe name"); | |
| 68 assert(probe->function != NULL, "valid probe function spec"); | |
| 69 methodHandle h_method = | |
| 70 methodHandle(THREAD, Method::resolve_jmethod_id(probe->method)); | |
| 71 nmethod* nm = AdapterHandlerLibrary::create_dtrace_nmethod(h_method); | |
| 72 if (nm == NULL) { | |
| 73 delete probes; | |
| 74 THROW_MSG_0(vmSymbols::java_lang_RuntimeException(), | |
| 75 "Unable to register DTrace probes (CodeCache: no room for DTrace nmethods)."); | |
| 76 } | |
| 77 h_method()->set_not_compilable(); | |
| 78 h_method()->set_code(h_method, nm); | |
| 79 probes->nmethod_at_put(count++, nm); | |
| 80 } | |
| 81 } | |
| 82 | |
| 83 int handle = pd_activate((void*)probes, | |
| 84 module_name, providers_count, providers); | |
| 85 if (handle < 0) { | |
| 86 delete probes; | |
| 87 THROW_MSG_0(vmSymbols::java_lang_RuntimeException(), | |
| 88 "Unable to register DTrace probes (internal error)."); | |
| 89 } | |
| 90 probes->set_helper_handle(handle); | |
| 91 return RegisteredProbes::toOpaqueProbes(probes); | |
| 92 } | |
| 93 | |
| 94 jboolean DTraceJSDT::is_probe_enabled(jmethodID method) { | |
| 95 Method* m = Method::resolve_jmethod_id(method); | |
| 96 return nativeInstruction_at(m->code()->trap_address())->is_dtrace_trap(); | |
| 97 } | |
| 98 | |
| 99 void DTraceJSDT::dispose(OpaqueProbes probes) { | |
| 100 RegisteredProbes* p = RegisteredProbes::toRegisteredProbes(probes); | |
| 101 if (probes != -1 && p != NULL) { | |
| 102 pd_dispose(p->helper_handle()); | |
| 103 delete p; | |
| 104 } | |
| 105 } | |
| 106 | |
| 107 jboolean DTraceJSDT::is_supported() { | |
| 108 return pd_is_supported(); | |
| 109 } | |
| 110 | |
| 111 #else // HAVE_DTRACE_H | |
| 112 | |
| 113 jlong DTraceJSDT::activate( | |
| 114 jint version, jstring module_name, jint providers_count, | |
| 115 JVM_DTraceProvider* providers, TRAPS) { | |
| 116 return 0; | |
| 117 } | |
| 118 | |
| 119 jboolean DTraceJSDT::is_probe_enabled(jmethodID method) { | |
| 120 return false; | |
| 121 } | |
| 122 | |
| 123 void DTraceJSDT::dispose(OpaqueProbes probes) { | |
| 124 return; | |
| 125 } | |
| 126 | |
| 127 jboolean DTraceJSDT::is_supported() { | |
| 128 return false; | |
| 129 } | |
| 130 | |
| 131 #endif // ndef HAVE_DTRACE_H |
