Mercurial > hg > truffle
view src/share/vm/runtime/dtraceJSDT.hpp @ 7432:0b3d19153cc6
8001028: Improve GC option handling
Summary: If there are not enough native resources to create the ReferenceHandler or Finalizer Java threads, the VM will attempt to throw an OOME before the java.lang.Class class has been initialized. This can result in assertion failures and other crashes. Move the initialization of the java.lang.Class class to just before the initialization of the java.lang.ref.Finalizer class.
Reviewed-by: jwilhelm, dholmes, coleenp
author | johnc |
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date | Wed, 12 Dec 2012 12:07:32 -0800 |
parents | b9a9ed0f8eeb |
children |
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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. * */ #ifndef SHARE_VM_RUNTIME_DTRACEJSDT_HPP #define SHARE_VM_RUNTIME_DTRACEJSDT_HPP #include "code/nmethod.hpp" #ifdef TARGET_ARCH_x86 # include "nativeInst_x86.hpp" #endif #ifdef TARGET_ARCH_sparc # include "nativeInst_sparc.hpp" #endif #ifdef TARGET_ARCH_zero # include "nativeInst_zero.hpp" #endif #ifdef TARGET_ARCH_arm # include "nativeInst_arm.hpp" #endif #ifdef TARGET_ARCH_ppc # include "nativeInst_ppc.hpp" #endif 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<mtInternal> { 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, mtInternal); } ~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, mtInternal); _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; } }; #endif // SHARE_VM_RUNTIME_DTRACEJSDT_HPP