Tue, 07 Jul 2009 14:23:00 -0400
6855834: G1: minimize the output when -XX:+PrintHeapAtGC is set
Summary: Changing the behavior of -XX:+PrintHeapAtGC for G1 from printing lengthy, per-region information to instead printing a concise summary.
Reviewed-by: ysr, apetrusenko, jcoomes
kamg@551 | 1 | /* |
xdono@631 | 2 | * Copyright 1997-2008 Sun Microsystems, Inc. All Rights Reserved. |
kamg@551 | 3 | * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. |
kamg@551 | 4 | * |
kamg@551 | 5 | * This code is free software; you can redistribute it and/or modify it |
kamg@551 | 6 | * under the terms of the GNU General Public License version 2 only, as |
kamg@551 | 7 | * published by the Free Software Foundation. |
kamg@551 | 8 | * |
kamg@551 | 9 | * This code is distributed in the hope that it will be useful, but WITHOUT |
kamg@551 | 10 | * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or |
kamg@551 | 11 | * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License |
kamg@551 | 12 | * version 2 for more details (a copy is included in the LICENSE file that |
kamg@551 | 13 | * accompanied this code). |
kamg@551 | 14 | * |
kamg@551 | 15 | * You should have received a copy of the GNU General Public License version |
kamg@551 | 16 | * 2 along with this work; if not, write to the Free Software Foundation, |
kamg@551 | 17 | * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. |
kamg@551 | 18 | * |
kamg@551 | 19 | * Please contact Sun Microsystems, Inc., 4150 Network Circle, Santa Clara, |
kamg@551 | 20 | * CA 95054 USA or visit www.sun.com if you need additional information or |
kamg@551 | 21 | * have any questions. |
kamg@551 | 22 | * |
kamg@551 | 23 | */ |
kamg@551 | 24 | |
kamg@551 | 25 | class RegisteredProbes; |
kamg@551 | 26 | typedef jlong OpaqueProbes; |
kamg@551 | 27 | |
kamg@551 | 28 | class DTraceJSDT : AllStatic { |
kamg@551 | 29 | private: |
kamg@551 | 30 | |
kamg@551 | 31 | static int pd_activate(void* moduleBaseAddress, jstring module, |
kamg@551 | 32 | jint providers_count, JVM_DTraceProvider* providers); |
kamg@551 | 33 | static void pd_dispose(int handle); |
kamg@551 | 34 | static jboolean pd_is_supported(); |
kamg@551 | 35 | |
kamg@551 | 36 | public: |
kamg@551 | 37 | |
kamg@551 | 38 | static OpaqueProbes activate( |
kamg@551 | 39 | jint version, jstring module_name, jint providers_count, |
kamg@551 | 40 | JVM_DTraceProvider* providers, TRAPS); |
kamg@551 | 41 | static jboolean is_probe_enabled(jmethodID method); |
kamg@551 | 42 | static void dispose(OpaqueProbes handle); |
kamg@551 | 43 | static jboolean is_supported(); |
kamg@551 | 44 | }; |
kamg@551 | 45 | |
kamg@551 | 46 | class RegisteredProbes : public CHeapObj { |
kamg@551 | 47 | private: |
kamg@551 | 48 | nmethod** _nmethods; // all the probe methods |
kamg@551 | 49 | size_t _count; // number of probe methods |
kamg@551 | 50 | int _helper_handle; // DTrace-assigned identifier |
kamg@551 | 51 | |
kamg@551 | 52 | public: |
kamg@551 | 53 | RegisteredProbes(size_t count) { |
kamg@551 | 54 | _count = count; |
kamg@551 | 55 | _nmethods = NEW_C_HEAP_ARRAY(nmethod*, count); |
kamg@551 | 56 | } |
kamg@551 | 57 | |
kamg@551 | 58 | ~RegisteredProbes() { |
kamg@551 | 59 | for (size_t i = 0; i < _count; ++i) { |
kamg@551 | 60 | // Let the sweeper reclaim it |
kamg@551 | 61 | _nmethods[i]->make_not_entrant(); |
kamg@551 | 62 | _nmethods[i]->method()->clear_code(); |
kamg@551 | 63 | } |
kamg@551 | 64 | FREE_C_HEAP_ARRAY(nmethod*, _nmethods); |
kamg@551 | 65 | _nmethods = NULL; |
kamg@551 | 66 | _count = 0; |
kamg@551 | 67 | } |
kamg@551 | 68 | |
kamg@551 | 69 | static RegisteredProbes* toRegisteredProbes(OpaqueProbes p) { |
kamg@551 | 70 | return (RegisteredProbes*)(intptr_t)p; |
kamg@551 | 71 | } |
kamg@551 | 72 | |
kamg@551 | 73 | static OpaqueProbes toOpaqueProbes(RegisteredProbes* p) { |
kamg@551 | 74 | return (OpaqueProbes)(intptr_t)p; |
kamg@551 | 75 | } |
kamg@551 | 76 | |
kamg@551 | 77 | void set_helper_handle(int handle) { _helper_handle = handle; } |
kamg@551 | 78 | int helper_handle() const { return _helper_handle; } |
kamg@551 | 79 | |
kamg@551 | 80 | nmethod* nmethod_at(size_t i) { |
kamg@551 | 81 | assert(i >= 0 && i < _count, "bad nmethod index"); |
kamg@551 | 82 | return _nmethods[i]; |
kamg@551 | 83 | } |
kamg@551 | 84 | |
kamg@551 | 85 | void nmethod_at_put(size_t i, nmethod* nm) { |
kamg@551 | 86 | assert(i >= 0 && i < _count, "bad nmethod index"); |
kamg@551 | 87 | _nmethods[i] = nm; |
kamg@551 | 88 | } |
kamg@551 | 89 | }; |