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/*
* 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
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