Mon, 04 Jan 2010 14:51:26 -0800
6637203: Classunloading messages go to stdout rather than Xloggc file, causing hangs when stdout is closed
Summary: Decoupled TraceClassUnloading from verbose:gc, JVMTI_VERBOSE_GC and PrintGC[Details], making it settable in a manner identical to TraceClassLoading. Reverted an inadvertent change of TraceClassUnloading output in a previous changeset from gclog back to tty.
Reviewed-by: coleenp, dholmes, jmasa, poonam
duke@435 | 1 | /* |
duke@435 | 2 | * Copyright 2002-2005 Sun Microsystems, Inc. All Rights Reserved. |
duke@435 | 3 | * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. |
duke@435 | 4 | * |
duke@435 | 5 | * This code is free software; you can redistribute it and/or modify it |
duke@435 | 6 | * under the terms of the GNU General Public License version 2 only, as |
duke@435 | 7 | * published by the Free Software Foundation. |
duke@435 | 8 | * |
duke@435 | 9 | * This code is distributed in the hope that it will be useful, but WITHOUT |
duke@435 | 10 | * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or |
duke@435 | 11 | * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License |
duke@435 | 12 | * version 2 for more details (a copy is included in the LICENSE file that |
duke@435 | 13 | * accompanied this code). |
duke@435 | 14 | * |
duke@435 | 15 | * You should have received a copy of the GNU General Public License version |
duke@435 | 16 | * 2 along with this work; if not, write to the Free Software Foundation, |
duke@435 | 17 | * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. |
duke@435 | 18 | * |
duke@435 | 19 | * Please contact Sun Microsystems, Inc., 4150 Network Circle, Santa Clara, |
duke@435 | 20 | * CA 95054 USA or visit www.sun.com if you need additional information or |
duke@435 | 21 | * have any questions. |
duke@435 | 22 | * |
duke@435 | 23 | */ |
duke@435 | 24 | // |
duke@435 | 25 | // An object for encapsulating the machine/os dependent part of a JavaThread frame state |
duke@435 | 26 | // |
duke@435 | 27 | class JavaThread; |
duke@435 | 28 | |
duke@435 | 29 | class JavaFrameAnchor VALUE_OBJ_CLASS_SPEC { |
duke@435 | 30 | // Too many friends... |
duke@435 | 31 | friend class CallNativeDirectNode; |
duke@435 | 32 | friend class OptoRuntime; |
duke@435 | 33 | friend class Runtime1; |
duke@435 | 34 | friend class StubAssembler; |
duke@435 | 35 | friend class CallRuntimeDirectNode; |
duke@435 | 36 | friend class MacroAssembler; |
duke@435 | 37 | friend class InterpreterGenerator; |
duke@435 | 38 | friend class LIR_Assembler; |
duke@435 | 39 | friend class GraphKit; |
duke@435 | 40 | friend class StubGenerator; |
duke@435 | 41 | friend class JavaThread; |
duke@435 | 42 | friend class frame; |
duke@435 | 43 | friend class VMStructs; |
duke@435 | 44 | friend class BytecodeInterpreter; |
duke@435 | 45 | friend class JavaCallWrapper; |
duke@435 | 46 | |
duke@435 | 47 | private: |
duke@435 | 48 | // |
duke@435 | 49 | // Whenever _last_Java_sp != NULL other anchor fields MUST be valid! |
duke@435 | 50 | // The stack may not be walkable [check with walkable() ] but the values must be valid. |
duke@435 | 51 | // The profiler apparently depends on this. |
duke@435 | 52 | // |
duke@435 | 53 | intptr_t* volatile _last_Java_sp; |
duke@435 | 54 | |
duke@435 | 55 | // Whenever we call from Java to native we can not be assured that the return |
duke@435 | 56 | // address that composes the last_Java_frame will be in an accessible location |
duke@435 | 57 | // so calls from Java to native store that pc (or one good enough to locate |
duke@435 | 58 | // the oopmap) in the frame anchor. Since the frames that call from Java to |
duke@435 | 59 | // native are never deoptimized we never need to patch the pc and so this |
duke@435 | 60 | // is acceptable. |
duke@435 | 61 | volatile address _last_Java_pc; |
duke@435 | 62 | |
duke@435 | 63 | // tells whether the last Java frame is set |
duke@435 | 64 | // It is important that when last_Java_sp != NULL that the rest of the frame |
duke@435 | 65 | // anchor (including platform specific) all be valid. |
duke@435 | 66 | |
duke@435 | 67 | bool has_last_Java_frame() const { return _last_Java_sp != NULL; } |
duke@435 | 68 | // This is very dangerous unless sp == NULL |
duke@435 | 69 | // Invalidate the anchor so that has_last_frame is false |
duke@435 | 70 | // and no one should look at the other fields. |
duke@435 | 71 | void zap(void) { _last_Java_sp = NULL; } |
duke@435 | 72 | |
duke@435 | 73 | #include "incls/_javaFrameAnchor_pd.hpp.incl" |
duke@435 | 74 | |
duke@435 | 75 | public: |
duke@435 | 76 | JavaFrameAnchor() { clear(); } |
duke@435 | 77 | JavaFrameAnchor(JavaFrameAnchor *src) { copy(src); } |
duke@435 | 78 | |
duke@435 | 79 | address last_Java_pc(void) { return _last_Java_pc; } |
duke@435 | 80 | void set_last_Java_pc(address pc) { _last_Java_pc = pc; } |
duke@435 | 81 | |
duke@435 | 82 | // Assembly stub generation helpers |
duke@435 | 83 | |
duke@435 | 84 | static ByteSize last_Java_sp_offset() { return byte_offset_of(JavaFrameAnchor, _last_Java_sp); } |
duke@435 | 85 | static ByteSize last_Java_pc_offset() { return byte_offset_of(JavaFrameAnchor, _last_Java_pc); } |
duke@435 | 86 | |
duke@435 | 87 | }; |