Wed, 01 Feb 2012 07:59:01 -0800
7141200: log some interesting information in ring buffers for crashes
Reviewed-by: kvn, jrose, kevinw, brutisso, twisti, jmasa
1 /*
2 * Copyright (c) 2002, 2011, Oracle and/or its affiliates. All rights reserved.
3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
4 *
5 * This code is free software; you can redistribute it and/or modify it
6 * under the terms of the GNU General Public License version 2 only, as
7 * published by the Free Software Foundation.
8 *
9 * This code is distributed in the hope that it will be useful, but WITHOUT
10 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
11 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
12 * version 2 for more details (a copy is included in the LICENSE file that
13 * accompanied this code).
14 *
15 * You should have received a copy of the GNU General Public License version
16 * 2 along with this work; if not, write to the Free Software Foundation,
17 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
18 *
19 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
20 * or visit www.oracle.com if you need additional information or have any
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23 */
25 #ifndef SHARE_VM_COMPILER_COMPILELOG_HPP
26 #define SHARE_VM_COMPILER_COMPILELOG_HPP
28 #include "utilities/xmlstream.hpp"
30 class ciObject;
31 class ciSymbol;
33 // CompileLog
34 //
35 // An open stream for logging information about activities in a
36 // compiler thread. There is exactly one per CompilerThread,
37 // if the +LogCompilation switch is enabled.
38 class CompileLog : public xmlStream {
39 private:
40 const char* _file; // name of file where XML goes
41 julong _file_end; // last good end of file
42 intx _thread_id; // which compile thread
44 stringStream _context; // optional, killable context marker
45 char _context_buffer[100];
47 char* _identities; // array of boolean
48 int _identities_limit;
49 int _identities_capacity;
51 CompileLog* _next; // static chain of all logs
53 static CompileLog* _first; // head of static chain
55 void va_tag(bool push, const char* format, va_list ap);
57 public:
58 CompileLog(const char* file, FILE* fp, intx thread_id);
59 ~CompileLog();
61 intx thread_id() { return _thread_id; }
62 const char* file() { return _file; }
63 stringStream* context() { return &_context; }
65 void name(ciSymbol* s); // name='s'
66 void name(Symbol* s) { xmlStream::name(s); }
68 // Output an object description, return obj->ident().
69 int identify(ciObject* obj);
70 void clear_identities();
72 // virtuals
73 virtual void see_tag(const char* tag, bool push);
74 virtual void pop_tag(const char* tag);
76 // make a provisional end of log mark
77 void mark_file_end() { _file_end = out()->count(); }
79 // copy all logs to the given stream
80 static void finish_log(outputStream* out);
81 static void finish_log_on_error(outputStream* out, char *buf, int buflen);
82 };
84 #endif // SHARE_VM_COMPILER_COMPILELOG_HPP