1 /****************************************************************************
2 * Copyright (c) 1998-2008,2009 Free Software Foundation, Inc. *
4 * Permission is hereby granted, free of charge, to any person obtaining a *
5 * copy of this software and associated documentation files (the *
6 * "Software"), to deal in the Software without restriction, including *
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8 * distribute, distribute with modifications, sublicense, and/or sell *
9 * copies of the Software, and to permit persons to whom the Software is *
10 * furnished to do so, subject to the following conditions: *
12 * The above copyright notice and this permission notice shall be included *
13 * in all copies or substantial portions of the Software. *
15 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS *
16 * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF *
17 * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. *
18 * IN NO EVENT SHALL THE ABOVE COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, *
19 * DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR *
20 * OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR *
21 * THE USE OR OTHER DEALINGS IN THE SOFTWARE. *
23 * Except as contained in this notice, the name(s) of the above copyright *
24 * holders shall not be used in advertising or otherwise to promote the *
25 * sale, use or other dealings in this Software without prior written *
27 ****************************************************************************/
29 /****************************************************************************
30 * Author: Zeyd M. Ben-Halim <zmbenhal@netcom.com> 1992,1995 *
31 * and: Eric S. Raymond <esr@snark.thyrsus.com> *
32 * and: Thomas E. Dickey 1996-on *
33 * and: Juergen Pfeifer *
34 ****************************************************************************/
37 * lib_trace.c - Tracing/Debugging routines
39 * The _tracef() function is originally from pcurses (by Pavel Curtis) in 1982.
40 * pcurses allowed one to enable/disable tracing using traceon() and traceoff()
41 * functions. ncurses provides a trace() function which allows one to
42 * selectively enable or disable several tracing features.
45 #include <curses.priv.h>
50 MODULE_ID("$Id: lib_trace.c,v 1.72 2009/02/28 20:37:37 tom Exp $")
52 NCURSES_EXPORT_VAR(unsigned) _nc_tracing = 0; /* always define this */
57 NCURSES_EXPORT(const char *)
58 NCURSES_PUBLIC_VAR(_nc_tputs_trace) (void)
60 return CURRENT_SCREEN ? CURRENT_SCREEN->_tputs_trace : _nc_prescreen._tputs_trace;
63 NCURSES_PUBLIC_VAR(_nc_outchars) (void)
65 return CURRENT_SCREEN ? CURRENT_SCREEN->_outchars : _nc_prescreen._outchars;
68 _nc_set_tputs_trace(const char *s)
71 CURRENT_SCREEN->_tputs_trace = s;
73 _nc_prescreen._tputs_trace = s;
76 _nc_count_outchars(long increment)
79 CURRENT_SCREEN->_outchars += increment;
81 _nc_prescreen._outchars += increment;
84 NCURSES_EXPORT_VAR(const char *) _nc_tputs_trace = "";
85 NCURSES_EXPORT_VAR(long) _nc_outchars = 0;
88 #define TraceFP _nc_globals.trace_fp
89 #define TracePath _nc_globals.trace_fname
90 #define TraceLevel _nc_globals.trace_level
93 trace(const unsigned int tracelevel)
95 if ((TraceFP == 0) && tracelevel) {
96 const char *mode = _nc_globals.init_trace ? "ab" : "wb";
98 if (TracePath[0] == '\0') {
99 int size = sizeof(TracePath) - 12;
100 if (getcwd(TracePath, size) == 0) {
101 perror("curses: Can't get working directory");
104 TracePath[size] = '\0';
105 assert(strlen(TracePath) <= size);
106 strcat(TracePath, "/trace");
107 if (_nc_is_dir_path(TracePath)) {
108 strcat(TracePath, ".log");
112 _nc_globals.init_trace = TRUE;
113 _nc_tracing = tracelevel;
114 if (_nc_access(TracePath, W_OK) < 0
115 || (TraceFP = fopen(TracePath, mode)) == 0) {
116 perror("curses: Can't open 'trace' file");
119 /* Try to set line-buffered mode, or (failing that) unbuffered,
120 * so that the trace-output gets flushed automatically at the
121 * end of each line. This is useful in case the program dies.
123 #if HAVE_SETVBUF /* ANSI */
124 (void) setvbuf(TraceFP, (char *) 0, _IOLBF, 0);
125 #elif HAVE_SETBUF /* POSIX */
126 (void) setbuffer(TraceFP, (char *) 0);
128 _tracef("TRACING NCURSES version %s.%d (tracelevel=%#x)",
130 NCURSES_VERSION_PATCH,
132 } else if (tracelevel == 0) {
137 _nc_tracing = tracelevel;
138 } else if (_nc_tracing != tracelevel) {
139 _nc_tracing = tracelevel;
140 _tracef("tracelevel=%#x", tracelevel);
145 _nc_va_tracef(const char *fmt, va_list ap)
147 static const char Called[] = T_CALLED("");
148 static const char Return[] = T_RETURN("");
152 unsigned doit = _nc_tracing;
153 int save_err = errno;
155 if (strlen(fmt) >= sizeof(Called) - 1) {
156 if (!strncmp(fmt, Called, sizeof(Called) - 1)) {
159 } else if (!strncmp(fmt, Return, sizeof(Return) - 1)) {
162 if (before || after) {
163 if ((TraceLevel <= 1)
164 || (doit & TRACE_ICALLS) != 0)
165 doit &= (TRACE_CALLS | TRACE_CCALLS);
176 * TRACE_ICALLS is "really" needed to show normal use with threaded
177 * applications, since anything can be running during a napms(),
178 * making it appear in the hierarchical trace as it other functions
181 * Rather than add the complication of a per-thread stack, just
182 * show the thread-id in each line of the trace.
184 # if USE_WEAK_SYMBOLS
187 fprintf(TraceFP, "%#lx:", (long) (void *) pthread_self());
189 if (before || after) {
191 for (n = 1; n < TraceLevel; n++)
192 fputs("+ ", TraceFP);
194 vfprintf(TraceFP, fmt, ap);
195 fputc('\n', TraceFP);
199 if (after && TraceLevel)
206 _tracef(const char *fmt,...)
211 _nc_va_tracef(fmt, ap);
215 /* Trace 'bool' return-values */
216 NCURSES_EXPORT(NCURSES_BOOL)
217 _nc_retrace_bool(NCURSES_BOOL code)
219 T((T_RETURN("%s"), code ? "TRUE" : "FALSE"));
223 /* Trace 'int' return-values */
225 _nc_retrace_int(int code)
227 T((T_RETURN("%d"), code));
231 /* Trace 'unsigned' return-values */
232 NCURSES_EXPORT(unsigned)
233 _nc_retrace_unsigned(unsigned code)
235 T((T_RETURN("%#x"), code));
239 /* Trace 'char*' return-values */
240 NCURSES_EXPORT(char *)
241 _nc_retrace_ptr(char *code)
243 T((T_RETURN("%s"), _nc_visbuf(code)));
247 /* Trace 'const char*' return-values */
248 NCURSES_EXPORT(const char *)
249 _nc_retrace_cptr(const char *code)
251 T((T_RETURN("%s"), _nc_visbuf(code)));
255 /* Trace 'NCURSES_CONST void*' return-values */
256 NCURSES_EXPORT(NCURSES_CONST void *)
257 _nc_retrace_cvoid_ptr(NCURSES_CONST void *code)
259 T((T_RETURN("%p"), code));
263 /* Trace 'void*' return-values */
264 NCURSES_EXPORT(void *)
265 _nc_retrace_void_ptr(void *code)
267 T((T_RETURN("%p"), code));
271 /* Trace 'SCREEN *' return-values */
272 NCURSES_EXPORT(SCREEN *)
273 _nc_retrace_sp(SCREEN *code)
275 T((T_RETURN("%p"), code));
279 /* Trace 'WINDOW *' return-values */
280 NCURSES_EXPORT(WINDOW *)
281 _nc_retrace_win(WINDOW *code)
283 T((T_RETURN("%p"), code));
289 * Check if the given trace-mask is enabled.
291 * This function may be called from within one of the functions that fills
292 * in parameters for _tracef(), but in that case we do not want to lock the
293 * mutex, since it is already locked.
296 _nc_use_tracef(unsigned mask)
300 _nc_lock_global(tst_tracef);
301 if (!_nc_globals.nested_tracef++) {
302 if ((result = (_nc_tracing & (mask))) != 0
303 && _nc_try_global(tracef) == 0) {
304 /* we will call _nc_locked_tracef(), no nesting so far */
306 /* we will not call _nc_locked_tracef() */
307 _nc_globals.nested_tracef = 0;
310 /* we may call _nc_locked_tracef(), but with nested_tracef > 0 */
311 result = (_nc_tracing & (mask));
313 _nc_unlock_global(tst_tracef);
318 * We call this if _nc_use_tracef() returns true, which means we must unlock
322 _nc_locked_tracef(const char *fmt,...)
327 _nc_va_tracef(fmt, ap);
330 if (--(_nc_globals.nested_tracef) == 0)
331 _nc_unlock_global(tracef);
333 #endif /* USE_REENTRANT */