Sat, 11 Dec 2010 13:20:56 -0500
7003748: Decode C stack frames when symbols are presented (PhoneHome project)
Summary: Implemented in-process C native stack frame decoding when symbols are available.
Reviewed-by: coleenp, never
1 /*
2 * Copyright (c) 1997, 2010, 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
21 * questions.
22 *
23 */
25 #ifndef SHARE_VM_UTILITIES_OSTREAM_HPP
26 #define SHARE_VM_UTILITIES_OSTREAM_HPP
28 #include "memory/allocation.hpp"
29 #include "runtime/timer.hpp"
31 // Output streams for printing
32 //
33 // Printing guidelines:
34 // Where possible, please use tty->print() and tty->print_cr().
35 // For product mode VM warnings use warning() which internally uses tty.
36 // In places where tty is not initialized yet or too much overhead,
37 // we may use jio_printf:
38 // jio_fprintf(defaultStream::output_stream(), "Message");
39 // This allows for redirection via -XX:+DisplayVMOutputToStdout and
40 // -XX:+DisplayVMOutputToStderr
41 class outputStream : public ResourceObj {
42 protected:
43 int _indentation; // current indentation
44 int _width; // width of the page
45 int _position; // position on the current line
46 int _newlines; // number of '\n' output so far
47 julong _precount; // number of chars output, less _position
48 TimeStamp _stamp; // for time stamps
50 void update_position(const char* s, size_t len);
51 static const char* do_vsnprintf(char* buffer, size_t buflen,
52 const char* format, va_list ap,
53 bool add_cr,
54 size_t& result_len);
56 public:
57 // creation
58 outputStream(int width = 80);
59 outputStream(int width, bool has_time_stamps);
61 // indentation
62 void indent();
63 void inc() { _indentation++; };
64 void dec() { _indentation--; };
65 int indentation() const { return _indentation; }
66 void set_indentation(int i) { _indentation = i; }
67 void fill_to(int col);
68 void move_to(int col, int slop = 6, int min_space = 2);
70 // sizing
71 int width() const { return _width; }
72 int position() const { return _position; }
73 int newlines() const { return _newlines; }
74 julong count() const { return _precount + _position; }
75 void set_count(julong count) { _precount = count - _position; }
76 void set_position(int pos) { _position = pos; }
78 // printing
79 void print(const char* format, ...);
80 void print_cr(const char* format, ...);
81 void vprint(const char *format, va_list argptr);
82 void vprint_cr(const char* format, va_list argptr);
83 void print_raw(const char* str) { write(str, strlen(str)); }
84 void print_raw(const char* str, int len) { write(str, len); }
85 void print_raw_cr(const char* str) { write(str, strlen(str)); cr(); }
86 void print_raw_cr(const char* str, int len){ write(str, len); cr(); }
87 void put(char ch);
88 void sp(int count = 1);
89 void cr();
90 void bol() { if (_position > 0) cr(); }
92 // Time stamp
93 TimeStamp& time_stamp() { return _stamp; }
94 void stamp();
95 void stamp(bool guard, const char* prefix, const char* suffix);
96 void stamp(bool guard) {
97 stamp(guard, "", ": ");
98 }
99 // Date stamp
100 void date_stamp(bool guard, const char* prefix, const char* suffix);
101 // A simplified call that includes a suffix of ": "
102 void date_stamp(bool guard) {
103 date_stamp(guard, "", ": ");
104 }
106 // portable printing of 64 bit integers
107 void print_jlong(jlong value);
108 void print_julong(julong value);
110 // flushing
111 virtual void flush() {}
112 virtual void write(const char* str, size_t len) = 0;
113 virtual ~outputStream() {} // close properly on deletion
115 void dec_cr() { dec(); cr(); }
116 void inc_cr() { inc(); cr(); }
117 };
119 // standard output
120 // ANSI C++ name collision
121 extern outputStream* tty; // tty output
122 extern outputStream* gclog_or_tty; // stream for gc log if -Xloggc:<f>, or tty
124 // advisory locking for the shared tty stream:
125 class ttyLocker: StackObj {
126 private:
127 intx _holder;
129 public:
130 static intx hold_tty(); // returns a "holder" token
131 static void release_tty(intx holder); // must witness same token
132 static void break_tty_lock_for_safepoint(intx holder);
134 ttyLocker() { _holder = hold_tty(); }
135 ~ttyLocker() { release_tty(_holder); }
136 };
138 // for writing to strings; buffer will expand automatically
139 class stringStream : public outputStream {
140 protected:
141 char* buffer;
142 size_t buffer_pos;
143 size_t buffer_length;
144 bool buffer_fixed;
145 public:
146 stringStream(size_t initial_bufsize = 256);
147 stringStream(char* fixed_buffer, size_t fixed_buffer_size);
148 ~stringStream();
149 virtual void write(const char* c, size_t len);
150 size_t size() { return buffer_pos; }
151 const char* base() { return buffer; }
152 void reset() { buffer_pos = 0; _precount = 0; _position = 0; }
153 char* as_string();
154 };
156 class fileStream : public outputStream {
157 protected:
158 FILE* _file;
159 bool _need_close;
160 public:
161 fileStream(const char* file_name);
162 fileStream(FILE* file) { _file = file; _need_close = false; }
163 ~fileStream();
164 bool is_open() const { return _file != NULL; }
165 virtual void write(const char* c, size_t len);
166 void flush();
167 };
169 // unlike fileStream, fdStream does unbuffered I/O by calling
170 // open() and write() directly. It is async-safe, but output
171 // from multiple thread may be mixed together. Used by fatal
172 // error handler.
173 class fdStream : public outputStream {
174 protected:
175 int _fd;
176 bool _need_close;
177 public:
178 fdStream(const char* file_name);
179 fdStream(int fd = -1) { _fd = fd; _need_close = false; }
180 ~fdStream();
181 bool is_open() const { return _fd != -1; }
182 void set_fd(int fd) { _fd = fd; _need_close = false; }
183 int fd() const { return _fd; }
184 virtual void write(const char* c, size_t len);
185 void flush() {};
186 };
188 void ostream_init();
189 void ostream_init_log();
190 void ostream_exit();
191 void ostream_abort();
193 // staticBufferStream uses a user-supplied buffer for all formatting.
194 // Used for safe formatting during fatal error handling. Not MT safe.
195 // Do not share the stream between multiple threads.
196 class staticBufferStream : public outputStream {
197 private:
198 char* _buffer;
199 size_t _buflen;
200 outputStream* _outer_stream;
201 public:
202 staticBufferStream(char* buffer, size_t buflen,
203 outputStream *outer_stream);
204 ~staticBufferStream() {};
205 virtual void write(const char* c, size_t len);
206 void flush();
207 void print(const char* format, ...);
208 void print_cr(const char* format, ...);
209 void vprint(const char *format, va_list argptr);
210 void vprint_cr(const char* format, va_list argptr);
211 };
213 // In the non-fixed buffer case an underlying buffer will be created and
214 // managed in C heap. Not MT-safe.
215 class bufferedStream : public outputStream {
216 protected:
217 char* buffer;
218 size_t buffer_pos;
219 size_t buffer_max;
220 size_t buffer_length;
221 bool buffer_fixed;
222 public:
223 bufferedStream(size_t initial_bufsize = 256, size_t bufmax = 1024*1024*10);
224 bufferedStream(char* fixed_buffer, size_t fixed_buffer_size, size_t bufmax = 1024*1024*10);
225 ~bufferedStream();
226 virtual void write(const char* c, size_t len);
227 size_t size() { return buffer_pos; }
228 const char* base() { return buffer; }
229 void reset() { buffer_pos = 0; _precount = 0; _position = 0; }
230 char* as_string();
231 };
233 #define O_BUFLEN 2000 // max size of output of individual print() methods
235 #ifndef PRODUCT
237 class networkStream : public bufferedStream {
239 private:
240 int _socket;
242 public:
243 networkStream();
244 ~networkStream();
246 bool connect(const char *host, short port);
247 bool is_open() const { return _socket != -1; }
248 int read(char *buf, size_t len);
249 void close();
250 virtual void flush();
251 };
253 #endif
255 #endif // SHARE_VM_UTILITIES_OSTREAM_HPP