gdb/proc-why.c

   1 /* Machine-independent support for SVR4 /proc (process file system)
   2
   3    Copyright (C) 1999, 2000, 2004, 2007 Free Software Foundation, Inc.
   4
   5    Written by Michael Snyder at Cygnus Solutions.
   6    Based on work by Fred Fish, Stu Grossman, Geoff Noer, and others.
   7
   8    This program is free software; you can redistribute it and/or modify
   9    it under the terms of the GNU General Public License as published by
  10    the Free Software Foundation; either version 2 of the License, or
  11    (at your option) any later version.
  12
  13    This program is distributed in the hope that it will be useful,
  14    but WITHOUT ANY WARRANTY; without even the implied warranty of
  15    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  16    GNU General Public License for more details.
  17
  18    You should have received a copy of the GNU General Public License
  19    along with this program; if not, write to the Free Software
  20    Foundation, Inc., 51 Franklin Street, Fifth Floor,
  21    Boston, MA 02110-1301, USA.  */
  22
  23 #include "defs.h"
  24
  25 #ifdef NEW_PROC_API
  26 #define _STRUCTURED_PROC 1
  27 #endif
  28
  29 #include <stdio.h>
  30 #include <sys/types.h>
  31 #include <sys/procfs.h>
  32
  33 #include "proc-utils.h"
  34
  35 /* Much of the information used in the /proc interface, particularly
  36    for printing status information, is kept as tables of structures of
  37    the following form.  These tables can be used to map numeric values
  38    to their symbolic names and to a string that describes their
  39    specific use.  */
  40
  41 struct trans
  42 {
  43   int value;                    /* The numeric value.  */
  44   char *name;                   /* The equivalent symbolic value.  */
  45   char *desc;                   /* Short description of value.  */
  46 };
  47
  48 /* Translate values in the pr_why field of a `struct prstatus' or
  49    `struct lwpstatus'.  */
  50
  51 static struct trans pr_why_table[] =
  52 {
  53 #if defined (PR_REQUESTED)
  54   /* All platforms.  */
  55   { PR_REQUESTED, "PR_REQUESTED",
  56     "Directed to stop by debugger via P(IO)CSTOP or P(IO)CWSTOP" },
  57 #endif
  58 #if defined (PR_SIGNALLED)
  59   /* All platforms.  */
  60   { PR_SIGNALLED, "PR_SIGNALLED", "Receipt of a traced signal" },
  61 #endif
  62 #if defined (PR_SYSENTRY)
  63   /* All platforms.  */
  64   { PR_SYSENTRY, "PR_SYSENTRY", "Entry to a traced system call" },
  65 #endif
  66 #if defined (PR_SYSEXIT)
  67   /* All platforms.  */
  68   { PR_SYSEXIT, "PR_SYSEXIT", "Exit from a traced system call" },
  69 #endif
  70 #if defined (PR_JOBCONTROL)
  71   /* All platforms.  */
  72   { PR_JOBCONTROL, "PR_JOBCONTROL", "Default job control stop signal action" },
  73 #endif
  74 #if defined (PR_FAULTED)
  75   /* All platforms.  */
  76   { PR_FAULTED, "PR_FAULTED", "Incurred a traced hardware fault" },
  77 #endif
  78 #if defined (PR_SUSPENDED)
  79   /* Solaris and UnixWare.  */
  80   { PR_SUSPENDED, "PR_SUSPENDED", "Process suspended" },
  81 #endif
  82 #if defined (PR_CHECKPOINT)
  83   /* Solaris only.  */
  84   { PR_CHECKPOINT, "PR_CHECKPOINT", "Process stopped at checkpoint" },
  85 #endif
  86 #if defined (PR_FORKSTOP)
  87   /* OSF/1 only.  */
  88   { PR_FORKSTOP, "PR_FORKSTOP", "Process stopped at end of fork call" },
  89 #endif
  90 #if defined (PR_TCRSTOP)
  91   /* OSF/1 only.  */
  92   { PR_TCRSTOP, "PR_TCRSTOP", "Process stopped on thread creation" },
  93 #endif
  94 #if defined (PR_TTSTOP)
  95   /* OSF/1 only.  */
  96   { PR_TTSTOP, "PR_TTSTOP", "Process stopped on thread termination" },
  97 #endif
  98 #if defined (PR_DEAD)
  99   /* OSF/1 only.  */
 100   { PR_DEAD, "PR_DEAD", "Process stopped in exit system call" },
 101 #endif
 102 };
 103
 104 /* Pretty-print the pr_why field of a `struct prstatus' or `struct
 105    lwpstatus'.  */
 106
 107 void
 108 proc_prettyfprint_why (FILE *file, unsigned long why, unsigned long what,
 109                        int verbose)
 110 {
 111   int i;
 112
 113   if (why == 0)
 114     return;
 115
 116   for (i = 0; i < ARRAY_SIZE (pr_why_table); i++)
 117     if (why == pr_why_table[i].value)
 118       {
 119         fprintf (file, "%s ", pr_why_table[i].name);
 120         if (verbose)
 121           fprintf (file, ": %s ", pr_why_table[i].desc);
 122
 123         switch (why) {
 124 #ifdef PR_REQUESTED
 125         case PR_REQUESTED:
 126           break;                /* Nothing more to print.  */
 127 #endif
 128 #ifdef PR_SIGNALLED
 129         case PR_SIGNALLED:
 130           proc_prettyfprint_signal (file, what, verbose);
 131           break;
 132 #endif
 133 #ifdef PR_FAULTED
 134         case PR_FAULTED:
 135           proc_prettyfprint_fault (file, what, verbose);
 136           break;
 137 #endif
 138 #ifdef PR_SYSENTRY
 139         case PR_SYSENTRY:
 140           fprintf (file, "Entry to ");
 141           proc_prettyfprint_syscall (file, what, verbose);
 142           break;
 143 #endif
 144 #ifdef PR_SYSEXIT
 145         case PR_SYSEXIT:
 146           fprintf (file, "Exit from ");
 147           proc_prettyfprint_syscall (file, what, verbose);
 148           break;
 149 #endif
 150 #ifdef PR_JOBCONTROL
 151         case PR_JOBCONTROL:
 152           proc_prettyfprint_signal (file, what, verbose);
 153           break;
 154 #endif
 155 #ifdef PR_DEAD
 156         case PR_DEAD:
 157           fprintf (file, "Exit status: %ld\n", what);
 158           break;
 159 #endif
 160         default:
 161           fprintf (file, "Unknown why %ld, what %ld\n", why, what);
 162           break;
 163         }
 164         fprintf (file, "\n");
 165
 166         return;
 167       }
 168
 169   fprintf (file, "Unknown pr_why.\n");
 170 }
 171
 172 void
 173 proc_prettyprint_why (unsigned long why, unsigned long what, int verbose)
 174 {
 175   proc_prettyfprint_why (stdout, why, what, verbose);
 176 }