gdb/proc-why.c

   1 /* Machine-independent support for SVR4 /proc (process file system)
   2
   3    Copyright (C) 1999, 2000, 2004, 2007, 2008, 2009, 2010, 2011
   4    Free Software Foundation, Inc.
   5
   6    Written by Michael Snyder at Cygnus Solutions.
   7    Based on work by Fred Fish, Stu Grossman, Geoff Noer, and others.
   8
   9    This program is free software; you can redistribute it and/or modify
  10    it under the terms of the GNU General Public License as published by
  11    the Free Software Foundation; either version 3 of the License, or
  12    (at your option) any later version.
  13
  14    This program is distributed in the hope that it will be useful,
  15    but WITHOUT ANY WARRANTY; without even the implied warranty of
  16    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  17    GNU General Public License for more details.
  18
  19    You should have received a copy of the GNU General Public License
  20    along with this program.  If not, see <http://www.gnu.org/licenses/>.  */
  21
  22 #include "defs.h"
  23
  24 #ifdef NEW_PROC_API
  25 #define _STRUCTURED_PROC 1
  26 #endif
  27
  28 #include <stdio.h>
  29 #include <sys/types.h>
  30 #include <sys/procfs.h>
  31
  32 #include "proc-utils.h"
  33
  34 /* Much of the information used in the /proc interface, particularly
  35    for printing status information, is kept as tables of structures of
  36    the following form.  These tables can be used to map numeric values
  37    to their symbolic names and to a string that describes their
  38    specific use.  */
  39
  40 struct trans
  41 {
  42   int value;                    /* The numeric value.  */
  43   char *name;                   /* The equivalent symbolic value.  */
  44   char *desc;                   /* Short description of value.  */
  45 };
  46
  47 /* Translate values in the pr_why field of a `struct prstatus' or
  48    `struct lwpstatus'.  */
  49
  50 static struct trans pr_why_table[] =
  51 {
  52 #if defined (PR_REQUESTED)
  53   /* All platforms.  */
  54   { PR_REQUESTED, "PR_REQUESTED",
  55     "Directed to stop by debugger via P(IO)CSTOP or P(IO)CWSTOP" },
  56 #endif
  57 #if defined (PR_SIGNALLED)
  58   /* All platforms.  */
  59   { PR_SIGNALLED, "PR_SIGNALLED", "Receipt of a traced signal" },
  60 #endif
  61 #if defined (PR_SYSENTRY)
  62   /* All platforms.  */
  63   { PR_SYSENTRY, "PR_SYSENTRY", "Entry to a traced system call" },
  64 #endif
  65 #if defined (PR_SYSEXIT)
  66   /* All platforms.  */
  67   { PR_SYSEXIT, "PR_SYSEXIT", "Exit from a traced system call" },
  68 #endif
  69 #if defined (PR_JOBCONTROL)
  70   /* All platforms.  */
  71   { PR_JOBCONTROL, "PR_JOBCONTROL", "Default job control stop signal action" },
  72 #endif
  73 #if defined (PR_FAULTED)
  74   /* All platforms.  */
  75   { PR_FAULTED, "PR_FAULTED", "Incurred a traced hardware fault" },
  76 #endif
  77 #if defined (PR_SUSPENDED)
  78   /* Solaris and UnixWare.  */
  79   { PR_SUSPENDED, "PR_SUSPENDED", "Process suspended" },
  80 #endif
  81 #if defined (PR_CHECKPOINT)
  82   /* Solaris only.  */
  83   { PR_CHECKPOINT, "PR_CHECKPOINT", "Process stopped at checkpoint" },
  84 #endif
  85 #if defined (PR_FORKSTOP)
  86   /* OSF/1 only.  */
  87   { PR_FORKSTOP, "PR_FORKSTOP", "Process stopped at end of fork call" },
  88 #endif
  89 #if defined (PR_TCRSTOP)
  90   /* OSF/1 only.  */
  91   { PR_TCRSTOP, "PR_TCRSTOP", "Process stopped on thread creation" },
  92 #endif
  93 #if defined (PR_TTSTOP)
  94   /* OSF/1 only.  */
  95   { PR_TTSTOP, "PR_TTSTOP", "Process stopped on thread termination" },
  96 #endif
  97 #if defined (PR_DEAD)
  98   /* OSF/1 only.  */
  99   { PR_DEAD, "PR_DEAD", "Process stopped in exit system call" },
 100 #endif
 101 };
 102
 103 /* Pretty-print the pr_why field of a `struct prstatus' or `struct
 104    lwpstatus'.  */
 105
 106 void
 107 proc_prettyfprint_why (FILE *file, unsigned long why, unsigned long what,
 108                        int verbose)
 109 {
 110   int i;
 111
 112   if (why == 0)
 113     return;
 114
 115   for (i = 0; i < ARRAY_SIZE (pr_why_table); i++)
 116     if (why == pr_why_table[i].value)
 117       {
 118         fprintf (file, "%s ", pr_why_table[i].name);
 119         if (verbose)
 120           fprintf (file, ": %s ", pr_why_table[i].desc);
 121
 122         switch (why) {
 123 #ifdef PR_REQUESTED
 124         case PR_REQUESTED:
 125           break;                /* Nothing more to print.  */
 126 #endif
 127 #ifdef PR_SIGNALLED
 128         case PR_SIGNALLED:
 129           proc_prettyfprint_signal (file, what, verbose);
 130           break;
 131 #endif
 132 #ifdef PR_FAULTED
 133         case PR_FAULTED:
 134           proc_prettyfprint_fault (file, what, verbose);
 135           break;
 136 #endif
 137 #ifdef PR_SYSENTRY
 138         case PR_SYSENTRY:
 139           fprintf (file, "Entry to ");
 140           proc_prettyfprint_syscall (file, what, verbose);
 141           break;
 142 #endif
 143 #ifdef PR_SYSEXIT
 144         case PR_SYSEXIT:
 145           fprintf (file, "Exit from ");
 146           proc_prettyfprint_syscall (file, what, verbose);
 147           break;
 148 #endif
 149 #ifdef PR_JOBCONTROL
 150         case PR_JOBCONTROL:
 151           proc_prettyfprint_signal (file, what, verbose);
 152           break;
 153 #endif
 154 #ifdef PR_DEAD
 155         case PR_DEAD:
 156           fprintf (file, "Exit status: %ld\n", what);
 157           break;
 158 #endif
 159         default:
 160           fprintf (file, "Unknown why %ld, what %ld\n", why, what);
 161           break;
 162         }
 163         fprintf (file, "\n");
 164
 165         return;
 166       }
 167
 168   fprintf (file, "Unknown pr_why.\n");
 169 }
 170
 171 void
 172 proc_prettyprint_why (unsigned long why, unsigned long what, int verbose)
 173 {
 174   proc_prettyfprint_why (stdout, why, what, verbose);
 175 }