| /* |
| * Copyright (c) 1997, 2012, Oracle and/or its affiliates. All rights reserved. |
| * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. |
| * |
| * This code is free software; you can redistribute it and/or modify it |
| * under the terms of the GNU General Public License version 2 only, as |
| * published by the Free Software Foundation. |
| * |
| * This code is distributed in the hope that it will be useful, but WITHOUT |
| * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or |
| * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License |
| * version 2 for more details (a copy is included in the LICENSE file that |
| * accompanied this code). |
| * |
| * You should have received a copy of the GNU General Public License version |
| * 2 along with this work; if not, write to the Free Software Foundation, |
| * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. |
| * |
| * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA |
| * or visit www.oracle.com if you need additional information or have any |
| * questions. |
| * |
| */ |
| |
| #include "precompiled.hpp" |
| #include "classfile/javaClasses.hpp" |
| #include "code/codeBlob.hpp" |
| #include "memory/allocation.hpp" |
| #include "prims/jvm.h" |
| #include "runtime/dtraceJSDT.hpp" |
| #include "runtime/jniHandles.hpp" |
| #include "runtime/os.hpp" |
| #include "utilities/exceptions.hpp" |
| #include "utilities/globalDefinitions.hpp" |
| #include "utilities/utf8.hpp" |
| |
| #ifdef HAVE_DTRACE_H |
| |
| jlong DTraceJSDT::activate( |
| jint version, jstring module_name, jint providers_count, |
| JVM_DTraceProvider* providers, TRAPS) { |
| |
| size_t count = 0; |
| RegisteredProbes* probes = NULL; |
| |
| if (!is_supported()) { |
| return 0; |
| } |
| |
| assert(module_name != NULL, "valid module name"); |
| assert(providers != NULL, "valid provider array"); |
| |
| for (int i = 0; i < providers_count; ++i) { |
| count += providers[i].probe_count; |
| } |
| probes = new RegisteredProbes(count); |
| count = 0; |
| |
| for (int i = 0; i < providers_count; ++i) { |
| assert(providers[i].name != NULL, "valid provider name"); |
| assert(providers[i].probe_count == 0 || providers[i].probes != NULL, |
| "valid probe count"); |
| for (int j = 0; j < providers[i].probe_count; ++j) { |
| JVM_DTraceProbe* probe = &(providers[i].probes[j]); |
| assert(probe != NULL, "valid probe"); |
| assert(probe->method != NULL, "valid method"); |
| assert(probe->name != NULL, "valid probe name"); |
| assert(probe->function != NULL, "valid probe function spec"); |
| methodHandle h_method = |
| methodHandle(THREAD, Method::resolve_jmethod_id(probe->method)); |
| nmethod* nm = AdapterHandlerLibrary::create_dtrace_nmethod(h_method); |
| if (nm == NULL) { |
| delete probes; |
| THROW_MSG_0(vmSymbols::java_lang_RuntimeException(), |
| "Unable to register DTrace probes (CodeCache: no room for DTrace nmethods)."); |
| } |
| h_method()->set_not_compilable(); |
| h_method()->set_code(h_method, nm); |
| probes->nmethod_at_put(count++, nm); |
| } |
| } |
| |
| int handle = pd_activate((void*)probes, |
| module_name, providers_count, providers); |
| if (handle < 0) { |
| delete probes; |
| THROW_MSG_0(vmSymbols::java_lang_RuntimeException(), |
| "Unable to register DTrace probes (internal error)."); |
| } |
| probes->set_helper_handle(handle); |
| return RegisteredProbes::toOpaqueProbes(probes); |
| } |
| |
| jboolean DTraceJSDT::is_probe_enabled(jmethodID method) { |
| Method* m = Method::resolve_jmethod_id(method); |
| return nativeInstruction_at(m->code()->trap_address())->is_dtrace_trap(); |
| } |
| |
| void DTraceJSDT::dispose(OpaqueProbes probes) { |
| RegisteredProbes* p = RegisteredProbes::toRegisteredProbes(probes); |
| if (probes != -1 && p != NULL) { |
| pd_dispose(p->helper_handle()); |
| delete p; |
| } |
| } |
| |
| jboolean DTraceJSDT::is_supported() { |
| return pd_is_supported(); |
| } |
| |
| #else // HAVE_DTRACE_H |
| |
| jlong DTraceJSDT::activate( |
| jint version, jstring module_name, jint providers_count, |
| JVM_DTraceProvider* providers, TRAPS) { |
| return 0; |
| } |
| |
| jboolean DTraceJSDT::is_probe_enabled(jmethodID method) { |
| return false; |
| } |
| |
| void DTraceJSDT::dispose(OpaqueProbes probes) { |
| return; |
| } |
| |
| jboolean DTraceJSDT::is_supported() { |
| return false; |
| } |
| |
| #endif // ndef HAVE_DTRACE_H |