src/gallium/auxiliary/util/u_debug.h

   1 /**************************************************************************
   2  *
   3  * Copyright 2008 Tungsten Graphics, Inc., Cedar Park, Texas.
   4  * All Rights Reserved.
   5  *
   6  * Permission is hereby granted, free of charge, to any person obtaining a
   7  * copy of this software and associated documentation files (the
   8  * "Software"), to deal in the Software without restriction, including
   9  * without limitation the rights to use, copy, modify, merge, publish,
  10  * distribute, sub license, and/or sell copies of the Software, and to
  11  * permit persons to whom the Software is furnished to do so, subject to
  12  * the following conditions:
  13  *
  14  * The above copyright notice and this permission notice (including the
  15  * next paragraph) shall be included in all copies or substantial portions
  16  * of the Software.
  17  *
  18  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
  19  * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
  20  * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT.
  21  * IN NO EVENT SHALL TUNGSTEN GRAPHICS AND/OR ITS SUPPLIERS BE LIABLE FOR
  22  * ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT,
  23  * TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE
  24  * SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
  25  *
  26  **************************************************************************/
  27
  28 /**
  29  * @file
  30  * Cross-platform debugging helpers.
  31  *
  32  * For now it just has assert and printf replacements, but it might be extended
  33  * with stack trace reports and more advanced logging in the near future.
  34  *
  35  * @author Jose Fonseca <jrfonseca@tungstengraphics.com>
  36  */
  37
  38 #ifndef U_DEBUG_H_
  39 #define U_DEBUG_H_
  40
  41
  42 #include "os/os_misc.h"
  43
  44
  45 #ifdef  __cplusplus
  46 extern "C" {
  47 #endif
  48
  49
  50 #if defined(__GNUC__)
  51 #define _util_printf_format(fmt, list) __attribute__ ((format (printf, fmt, list)))
  52 #else
  53 #define _util_printf_format(fmt, list)
  54 #endif
  55
  56 void _debug_vprintf(const char *format, va_list ap);
  57
  58
  59 static INLINE void
  60 _debug_printf(const char *format, ...)
  61 {
  62    va_list ap;
  63    va_start(ap, format);
  64    _debug_vprintf(format, ap);
  65    va_end(ap);
  66 }
  67
  68
  69 /**
  70  * Print debug messages.
  71  *
  72  * The actual channel used to output debug message is platform specific. To
  73  * avoid misformating or truncation, follow these rules of thumb:
  74  * - output whole lines
  75  * - avoid outputing large strings (512 bytes is the current maximum length
  76  * that is guaranteed to be printed in all platforms)
  77  */
  78 #if !defined(PIPE_OS_HAIKU)
  79 static INLINE void
  80 debug_printf(const char *format, ...) _util_printf_format(1,2);
  81
  82 static INLINE void
  83 debug_printf(const char *format, ...)
  84 {
  85 #ifdef DEBUG
  86    va_list ap;
  87    va_start(ap, format);
  88    _debug_vprintf(format, ap);
  89    va_end(ap);
  90 #else
  91    (void) format; /* silence warning */
  92 #endif
  93 }
  94
  95 #endif /* !PIPE_OS_HAIKU */
  96
  97 /*
  98  * ... isn't portable so we need to pass arguments in parentheses.
  99  *
 100  * usage:
 101  *    debug_printf_once(("awnser: %i\n", 42));
 102  */
 103 #define debug_printf_once(args) \
 104    do { \
 105       static boolean once = TRUE; \
 106       if (once) { \
 107          once = FALSE; \
 108          debug_printf args; \
 109       } \
 110    } while (0)
 111
 112
 113 #ifdef DEBUG
 114 #define debug_vprintf(_format, _ap) _debug_vprintf(_format, _ap)
 115 #else
 116 #define debug_vprintf(_format, _ap) ((void)0)
 117 #endif
 118
 119
 120 #ifdef DEBUG
 121 /**
 122  * Dump a blob in hex to the same place that debug_printf sends its
 123  * messages.
 124  */
 125 void debug_print_blob( const char *name, const void *blob, unsigned size );
 126
 127 /* Print a message along with a prettified format string
 128  */
 129 void debug_print_format(const char *msg, unsigned fmt );
 130 #else
 131 #define debug_print_blob(_name, _blob, _size) ((void)0)
 132 #define debug_print_format(_msg, _fmt) ((void)0)
 133 #endif
 134
 135
 136 /**
 137  * Hard-coded breakpoint.
 138  */
 139 #ifdef DEBUG
 140 #define debug_break() os_break()
 141 #else /* !DEBUG */
 142 #define debug_break() ((void)0)
 143 #endif /* !DEBUG */
 144
 145
 146 long
 147 debug_get_num_option(const char *name, long dfault);
 148
 149 void _debug_assert_fail(const char *expr,
 150                         const char *file,
 151                         unsigned line,
 152                         const char *function);
 153
 154
 155 /**
 156  * Assert macro
 157  *
 158  * Do not expect that the assert call terminates -- errors must be handled
 159  * regardless of assert behavior.
 160  *
 161  * For non debug builds the assert macro will expand to a no-op, so do not
 162  * call functions with side effects in the assert expression.
 163  */
 164 #ifdef DEBUG
 165 #define debug_assert(expr) ((expr) ? (void)0 : _debug_assert_fail(#expr, __FILE__, __LINE__, __FUNCTION__))
 166 #else
 167 #define debug_assert(expr) do { } while (0 && (expr))
 168 #endif
 169
 170
 171 /** Override standard assert macro */
 172 #ifdef assert
 173 #undef assert
 174 #endif
 175 #define assert(expr) debug_assert(expr)
 176
 177
 178 /**
 179  * Output the current function name.
 180  */
 181 #ifdef DEBUG
 182 #define debug_checkpoint() \
 183    _debug_printf("%s\n", __FUNCTION__)
 184 #else
 185 #define debug_checkpoint() \
 186    ((void)0)
 187 #endif
 188
 189
 190 /**
 191  * Output the full source code position.
 192  */
 193 #ifdef DEBUG
 194 #define debug_checkpoint_full() \
 195    _debug_printf("%s:%u:%s", __FILE__, __LINE__, __FUNCTION__)
 196 #else
 197 #define debug_checkpoint_full() \
 198    ((void)0)
 199 #endif
 200
 201
 202 /**
 203  * Output a warning message. Muted on release version.
 204  */
 205 #ifdef DEBUG
 206 #define debug_warning(__msg) \
 207    _debug_printf("%s:%u:%s: warning: %s\n", __FILE__, __LINE__, __FUNCTION__, __msg)
 208 #else
 209 #define debug_warning(__msg) \
 210    ((void)0)
 211 #endif
 212
 213
 214 /**
 215  * Output an error message. Not muted on release version.
 216  */
 217 #ifdef DEBUG
 218 #define debug_error(__msg) \
 219    _debug_printf("%s:%u:%s: error: %s\n", __FILE__, __LINE__, __FUNCTION__, __msg)
 220 #else
 221 #define debug_error(__msg) \
 222    _debug_printf("error: %s\n", __msg)
 223 #endif
 224
 225
 226 /**
 227  * Used by debug_dump_enum and debug_dump_flags to describe symbols.
 228  */
 229 struct debug_named_value
 230 {
 231    const char *name;
 232    unsigned long value;
 233 };
 234
 235
 236 /**
 237  * Some C pre-processor magic to simplify creating named values.
 238  *
 239  * Example:
 240  * @code
 241  * static const debug_named_value my_names[] = {
 242  *    DEBUG_NAMED_VALUE(MY_ENUM_VALUE_X),
 243  *    DEBUG_NAMED_VALUE(MY_ENUM_VALUE_Y),
 244  *    DEBUG_NAMED_VALUE(MY_ENUM_VALUE_Z),
 245  *    DEBUG_NAMED_VALUE_END
 246  * };
 247  *
 248  *    ...
 249  *    debug_printf("%s = %s\n",
 250  *                 name,
 251  *                 debug_dump_enum(my_names, my_value));
 252  *    ...
 253  * @endcode
 254  */
 255 #define DEBUG_NAMED_VALUE(__symbol) {#__symbol, (unsigned long)__symbol}
 256 #define DEBUG_NAMED_VALUE_END {NULL, 0}
 257
 258
 259 /**
 260  * Convert a enum value to a string.
 261  */
 262 const char *
 263 debug_dump_enum(const struct debug_named_value *names,
 264                 unsigned long value);
 265
 266 const char *
 267 debug_dump_enum_noprefix(const struct debug_named_value *names,
 268                          const char *prefix,
 269                          unsigned long value);
 270
 271
 272 /**
 273  * Convert binary flags value to a string.
 274  */
 275 const char *
 276 debug_dump_flags(const struct debug_named_value *names,
 277                  unsigned long value);
 278
 279
 280 /**
 281  * Get option.
 282  *
 283  * It is an alias for getenv on Linux.
 284  *
 285  * On Windows it reads C:\gallium.cfg, which is a text file with CR+LF line
 286  * endings with one option per line as
 287  *
 288  *   NAME=value
 289  *
 290  * This file must be terminated with an extra empty line.
 291  */
 292 const char *
 293 debug_get_option(const char *name, const char *dfault);
 294
 295 boolean
 296 debug_get_bool_option(const char *name, boolean dfault);
 297
 298 long
 299 debug_get_num_option(const char *name, long dfault);
 300
 301 unsigned long
 302 debug_get_flags_option(const char *name,
 303                        const struct debug_named_value *flags,
 304                        unsigned long dfault);
 305
 306
 307 unsigned long
 308 debug_memory_begin(void);
 309
 310 void
 311 debug_memory_end(unsigned long beginning);
 312
 313
 314 #ifdef DEBUG
 315 struct pipe_context;
 316 struct pipe_surface;
 317 struct pipe_transfer;
 318 struct pipe_texture;
 319
 320 void debug_dump_image(const char *prefix,
 321                       unsigned format, unsigned cpp,
 322                       unsigned width, unsigned height,
 323                       unsigned stride,
 324                       const void *data);
 325 void debug_dump_surface(struct pipe_context *pipe,
 326                         const char *prefix,
 327                         struct pipe_surface *surface);
 328 void debug_dump_texture(struct pipe_context *pipe,
 329                         const char *prefix,
 330                         struct pipe_texture *texture);
 331 void debug_dump_surface_bmp(struct pipe_context *pipe,
 332                             const char *filename,
 333                             struct pipe_surface *surface);
 334 void debug_dump_transfer_bmp(struct pipe_context *pipe,
 335                              const char *filename,
 336                              struct pipe_transfer *transfer);
 337 void debug_dump_float_rgba_bmp(const char *filename,
 338                                unsigned width, unsigned height,
 339                                float *rgba, unsigned stride);
 340 #else
 341 #define debug_dump_image(prefix, format, cpp, width, height, stride, data) ((void)0)
 342 #define debug_dump_surface(pipe, prefix, surface) ((void)0)
 343 #define debug_dump_surface_bmp(pipe, filename, surface) ((void)0)
 344 #define debug_dump_transfer_bmp(filename, transfer) ((void)0)
 345 #define debug_dump_float_rgba_bmp(filename, width, height, rgba, stride) ((void)0)
 346 #endif
 347
 348
 349 #ifdef  __cplusplus
 350 }
 351 #endif
 352
 353 #endif /* U_DEBUG_H_ */