Sat, 28 Mar 2009 15:47:29 -0700
6819891: ParNew: Fix work queue overflow code to deal correctly with +UseCompressedOops
Summary: When using compressed oops, rather than chaining the overflowed grey objects' pre-images through their klass words, we use GC-worker thread-local overflow stacks.
Reviewed-by: jcoomes, jmasa
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 | #include "incls/_precompiled.incl" |
kamg@551 | 26 | #include "incls/_dtraceJSDT.cpp.incl" |
kamg@551 | 27 | |
kamg@551 | 28 | #ifdef HAVE_DTRACE_H |
kamg@551 | 29 | |
kamg@551 | 30 | jlong DTraceJSDT::activate( |
kamg@551 | 31 | jint version, jstring module_name, jint providers_count, |
kamg@551 | 32 | JVM_DTraceProvider* providers, TRAPS) { |
kamg@551 | 33 | |
kamg@551 | 34 | size_t count = 0; |
kamg@551 | 35 | RegisteredProbes* probes = NULL; |
kamg@551 | 36 | |
kamg@551 | 37 | if (!is_supported()) { |
kamg@551 | 38 | return 0; |
kamg@551 | 39 | } |
kamg@551 | 40 | |
kamg@551 | 41 | assert(module_name != NULL, "valid module name"); |
kamg@551 | 42 | assert(providers != NULL, "valid provider array"); |
kamg@551 | 43 | |
kamg@551 | 44 | for (int i = 0; i < providers_count; ++i) { |
kamg@551 | 45 | count += providers[i].probe_count; |
kamg@551 | 46 | } |
kamg@551 | 47 | probes = new RegisteredProbes(count); |
kamg@551 | 48 | count = 0; |
kamg@551 | 49 | |
kamg@551 | 50 | for (int i = 0; i < providers_count; ++i) { |
kamg@551 | 51 | assert(providers[i].name != NULL, "valid provider name"); |
kamg@551 | 52 | assert(providers[i].probe_count == 0 || providers[i].probes != NULL, |
kamg@551 | 53 | "valid probe count"); |
kamg@551 | 54 | for (int j = 0; j < providers[i].probe_count; ++j) { |
kamg@551 | 55 | JVM_DTraceProbe* probe = &(providers[i].probes[j]); |
kamg@551 | 56 | assert(probe != NULL, "valid probe"); |
kamg@551 | 57 | assert(probe->method != NULL, "valid method"); |
kamg@551 | 58 | assert(probe->name != NULL, "valid probe name"); |
kamg@551 | 59 | assert(probe->function != NULL, "valid probe function spec"); |
kamg@551 | 60 | methodHandle h_method = |
kamg@551 | 61 | methodHandle(THREAD, JNIHandles::resolve_jmethod_id(probe->method)); |
kamg@551 | 62 | nmethod* nm = AdapterHandlerLibrary::create_dtrace_nmethod(h_method); |
kamg@551 | 63 | h_method()->set_not_compilable(CompLevel_highest_tier); |
kamg@551 | 64 | h_method()->set_code(h_method, nm); |
kamg@551 | 65 | probes->nmethod_at_put(count++, nm); |
kamg@551 | 66 | } |
kamg@551 | 67 | } |
kamg@551 | 68 | |
kamg@551 | 69 | int handle = pd_activate((void*)probes, |
kamg@551 | 70 | module_name, providers_count, providers); |
kamg@551 | 71 | if (handle <= 0) { |
kamg@551 | 72 | delete probes; |
kamg@551 | 73 | THROW_MSG_0(vmSymbols::java_lang_RuntimeException(), |
kamg@551 | 74 | "Unable to register DTrace probes (internal error)."); |
kamg@551 | 75 | } |
kamg@551 | 76 | probes->set_helper_handle(handle); |
kamg@551 | 77 | return RegisteredProbes::toOpaqueProbes(probes); |
kamg@551 | 78 | } |
kamg@551 | 79 | |
kamg@551 | 80 | jboolean DTraceJSDT::is_probe_enabled(jmethodID method) { |
kamg@551 | 81 | methodOop m = JNIHandles::resolve_jmethod_id(method); |
kamg@551 | 82 | return nativeInstruction_at(m->code()->trap_address())->is_dtrace_trap(); |
kamg@551 | 83 | } |
kamg@551 | 84 | |
kamg@551 | 85 | void DTraceJSDT::dispose(OpaqueProbes probes) { |
kamg@551 | 86 | RegisteredProbes* p = RegisteredProbes::toRegisteredProbes(probes); |
kamg@551 | 87 | if (probes != -1 && p != NULL) { |
kamg@551 | 88 | pd_dispose(p->helper_handle()); |
kamg@551 | 89 | delete p; |
kamg@551 | 90 | } |
kamg@551 | 91 | } |
kamg@551 | 92 | |
kamg@551 | 93 | jboolean DTraceJSDT::is_supported() { |
kamg@551 | 94 | return pd_is_supported(); |
kamg@551 | 95 | } |
kamg@551 | 96 | |
kamg@551 | 97 | #else // HAVE_DTRACE_H |
kamg@551 | 98 | |
kamg@551 | 99 | jlong DTraceJSDT::activate( |
kamg@551 | 100 | jint version, jstring module_name, jint providers_count, |
kamg@551 | 101 | JVM_DTraceProvider* providers, TRAPS) { |
kamg@551 | 102 | return 0; |
kamg@551 | 103 | } |
kamg@551 | 104 | |
kamg@551 | 105 | jboolean DTraceJSDT::is_probe_enabled(jmethodID method) { |
kamg@551 | 106 | return false; |
kamg@551 | 107 | } |
kamg@551 | 108 | |
kamg@551 | 109 | void DTraceJSDT::dispose(OpaqueProbes probes) { |
kamg@551 | 110 | return; |
kamg@551 | 111 | } |
kamg@551 | 112 | |
kamg@551 | 113 | jboolean DTraceJSDT::is_supported() { |
kamg@551 | 114 | return false; |
kamg@551 | 115 | } |
kamg@551 | 116 | |
kamg@551 | 117 | #endif // ndef HAVE_DTRACE_H |