Mercurial > hg > graal-compiler
diff src/share/vm/runtime/dtraceJSDT.cpp @ 116:018d5b58dd4f
6537506: Provide a mechanism for specifying Java-level USDT-like dtrace probes
Summary: Initial checkin of JSDT code
Reviewed-by: acorn, sbohne
author | kamg |
---|---|
date | Thu, 17 Apr 2008 22:18:15 -0400 |
parents | |
children | d1605aabd0a1 |
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--- /dev/null Thu Jan 01 00:00:00 1970 +0000 +++ b/src/share/vm/runtime/dtraceJSDT.cpp Thu Apr 17 22:18:15 2008 -0400 @@ -0,0 +1,117 @@ +/* + * Copyright 1997-2007 Sun Microsystems, Inc. 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 Sun Microsystems, Inc., 4150 Network Circle, Santa Clara, + * CA 95054 USA or visit www.sun.com if you need additional information or + * have any questions. + * + */ + +#include "incls/_precompiled.incl" +#include "incls/_dtraceJSDT.cpp.incl" + +#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, JNIHandles::resolve_jmethod_id(probe->method)); + nmethod* nm = AdapterHandlerLibrary::create_dtrace_nmethod(h_method); + h_method()->set_not_compilable(CompLevel_highest_tier); + 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) { + methodOop m = JNIHandles::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