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/*
* Copyright (c) 1997, 2008, 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.
*
*/
class RegisteredProbes;
typedef jlong OpaqueProbes;
class DTraceJSDT : AllStatic {
private:
static int pd_activate(void* moduleBaseAddress, jstring module,
jint providers_count, JVM_DTraceProvider* providers);
static void pd_dispose(int handle);
static jboolean pd_is_supported();
public:
static OpaqueProbes activate(
jint version, jstring module_name, jint providers_count,
JVM_DTraceProvider* providers, TRAPS);
static jboolean is_probe_enabled(jmethodID method);
static void dispose(OpaqueProbes handle);
static jboolean is_supported();
};
class RegisteredProbes : public CHeapObj {
private:
nmethod** _nmethods; // all the probe methods
size_t _count; // number of probe methods
int _helper_handle; // DTrace-assigned identifier
public:
RegisteredProbes(size_t count) {
_count = count;
_nmethods = NEW_C_HEAP_ARRAY(nmethod*, count);
}
~RegisteredProbes() {
for (size_t i = 0; i < _count; ++i) {
// Let the sweeper reclaim it
_nmethods[i]->make_not_entrant();
_nmethods[i]->method()->clear_code();
}
FREE_C_HEAP_ARRAY(nmethod*, _nmethods);
_nmethods = NULL;
_count = 0;
}
static RegisteredProbes* toRegisteredProbes(OpaqueProbes p) {
return (RegisteredProbes*)(intptr_t)p;
}
static OpaqueProbes toOpaqueProbes(RegisteredProbes* p) {
return (OpaqueProbes)(intptr_t)p;
}
void set_helper_handle(int handle) { _helper_handle = handle; }
int helper_handle() const { return _helper_handle; }
nmethod* nmethod_at(size_t i) {
assert(i >= 0 && i < _count, "bad nmethod index");
return _nmethods[i];
}
void nmethod_at_put(size_t i, nmethod* nm) {
assert(i >= 0 && i < _count, "bad nmethod index");
_nmethods[i] = nm;
}
};
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