c96a95c4b8
Update copyright year for files that have been modified in 2008 Reviewed-by: ohair, tbell
90 lines
2.8 KiB
C++
90 lines
2.8 KiB
C++
/*
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* Copyright 1997-2008 Sun Microsystems, Inc. All Rights Reserved.
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* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
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*
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* This code is free software; you can redistribute it and/or modify it
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* under the terms of the GNU General Public License version 2 only, as
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* published by the Free Software Foundation.
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*
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* This code is distributed in the hope that it will be useful, but WITHOUT
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* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
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* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
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* version 2 for more details (a copy is included in the LICENSE file that
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* accompanied this code).
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*
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* You should have received a copy of the GNU General Public License version
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* 2 along with this work; if not, write to the Free Software Foundation,
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* Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
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*
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* Please contact Sun Microsystems, Inc., 4150 Network Circle, Santa Clara,
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* CA 95054 USA or visit www.sun.com if you need additional information or
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* have any questions.
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*
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*/
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class RegisteredProbes;
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typedef jlong OpaqueProbes;
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class DTraceJSDT : AllStatic {
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private:
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static int pd_activate(void* moduleBaseAddress, jstring module,
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jint providers_count, JVM_DTraceProvider* providers);
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static void pd_dispose(int handle);
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static jboolean pd_is_supported();
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public:
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static OpaqueProbes activate(
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jint version, jstring module_name, jint providers_count,
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JVM_DTraceProvider* providers, TRAPS);
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static jboolean is_probe_enabled(jmethodID method);
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static void dispose(OpaqueProbes handle);
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static jboolean is_supported();
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};
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class RegisteredProbes : public CHeapObj {
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private:
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nmethod** _nmethods; // all the probe methods
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size_t _count; // number of probe methods
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int _helper_handle; // DTrace-assigned identifier
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public:
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RegisteredProbes(size_t count) {
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_count = count;
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_nmethods = NEW_C_HEAP_ARRAY(nmethod*, count);
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}
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~RegisteredProbes() {
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for (size_t i = 0; i < _count; ++i) {
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// Let the sweeper reclaim it
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_nmethods[i]->make_not_entrant();
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_nmethods[i]->method()->clear_code();
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}
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FREE_C_HEAP_ARRAY(nmethod*, _nmethods);
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_nmethods = NULL;
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_count = 0;
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}
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static RegisteredProbes* toRegisteredProbes(OpaqueProbes p) {
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return (RegisteredProbes*)(intptr_t)p;
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}
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static OpaqueProbes toOpaqueProbes(RegisteredProbes* p) {
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return (OpaqueProbes)(intptr_t)p;
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}
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void set_helper_handle(int handle) { _helper_handle = handle; }
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int helper_handle() const { return _helper_handle; }
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nmethod* nmethod_at(size_t i) {
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assert(i >= 0 && i < _count, "bad nmethod index");
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return _nmethods[i];
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}
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void nmethod_at_put(size_t i, nmethod* nm) {
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assert(i >= 0 && i < _count, "bad nmethod index");
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_nmethods[i] = nm;
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}
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};
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