kernel/debug.h

   1 #ifndef DEBUG_H
   2 #define DEBUG_H
   3
   4 /* This header file defines all debugging constants and macros, and declares
   5  * some variables. Certain debugging features redefine standard constants
   6  * and macros. Therefore, this header file should be included after the
   7  * other kernel headers.
   8  */
   9
  10 #include <ansi.h>
  11 #include "config.h"
  12
  13 /* Enable prints such as
  14  *  . send/receive failed due to deadlock or dead source or dead destination
  15  *  . trap not allowed
  16  *  . bogus message pointer
  17  *  . kernel call number not allowed by this process
  18  *
  19  * Of course the call still fails, but nothing is printed if these warnings
  20  * are disabled.
  21  */
  22 #define DEBUG_ENABLE_IPC_WARNINGS       0
  23 #define DEBUG_STACKTRACE                1
  24
  25 /* It's interesting to measure the time spent withing locked regions, because
  26  * this is the time that the system is deaf to interrupts.
  27  */
  28 #if DEBUG_TIME_LOCKS
  29
  30 #define TIMING_POINTS           20      /* timing resolution */
  31 #define TIMING_CATEGORIES       20
  32 #define TIMING_NAME             10
  33
  34 /* Definition of the data structure to store lock() timing data. */
  35 struct lock_timingdata {
  36         char names[TIMING_NAME];
  37         unsigned long lock_timings[TIMING_POINTS];
  38         unsigned long lock_timings_range[2];
  39         unsigned long binsize, resets, misses, measurements;
  40 };
  41
  42 /* The data is declared here, but allocated in debug.c. */
  43 extern struct lock_timingdata timingdata[TIMING_CATEGORIES];
  44
  45 /* Prototypes for the timing functionality. */
  46 _PROTOTYPE( void timer_start, (int cat, char *name) );
  47 _PROTOTYPE( void timer_end, (int cat) );
  48
  49 #define locktimestart(c, v) timer_start(c, v)
  50 #define locktimeend(c) timer_end(c)
  51 #else
  52 #define locktimestart(c, v)
  53 #define locktimeend(c)
  54 #endif /* DEBUG_TIME_LOCKS */
  55
  56 #endif /* DEBUG_H */