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#!/bin/sh

# User Interface Events.

# Copyright 1999, 2000, 2001, 2002 Free Software Foundation, Inc.

#

# Contributed by Cygnus Solutions.

#

# This file is part of GDB.

#

# This program is free software; you can redistribute it and/or modify

# it under the terms of the GNU General Public License as published by

# the Free Software Foundation; either version 2 of the License, or

# (at your option) any later version.

#

# This program is distributed in the hope that it will be useful,

# but WITHOUT ANY WARRANTY; without even the implied warranty of

# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the

# GNU General Public License for more details.

#

# You should have received a copy of the GNU General Public License

# along with this program; if not, write to the Free Software

# Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.

#

# What happens next:

#

# The gdb-events.h/gdb-events.c files this script generates are commited

# and published.

# Any UI module that is installing events is changed so that the

# events are installed using the ``set_gdb_events()'' and

# ``gdb_event_hooks()'' interfaces.  There could prove to be an issue

# here with respect to annotate.  We might need to accomodate a hook

# stack that allows several ui blocks to install their own events.

# Each of the variable events (as currently generated) is converted

# to either a straight function call or a function call with a

# predicate.

IFS=:

read="class returntype function formal actual attrib"

function_list ()

{

  # category:

  #        # -> disable

  #        * -> compatibility - pointer variable that is initialized

  #             by set_gdb_events().

  #        ? -> Predicate and function proper.

  #        f -> always call (must have a void returntype)

  # return-type

  # name

  # formal argument list

  # actual argument list

  # attributes

  # description

  cat <<EOF |

f:void:breakpoint_create:int b:b

f:void:breakpoint_delete:int b:b

f:void:breakpoint_modify:int b:b

f:void:tracepoint_create:int number:number

f:void:tracepoint_delete:int number:number

f:void:tracepoint_modify:int number:number

f:void:architecture_changed:void

f:void:target_changed:void

f:void:selected_frame_level_changed:int level:level

#*:void:annotate_starting_hook:void

#*:void:annotate_stopped_hook:void

#*:void:annotate_signalled_hook:void

#*:void:annotate_signal_hook:void

#*:void:annotate_exited_hook:void

##*:void:print_register_hook:int

##*:CORE_ADDR:find_toc_address_hook:CORE_ADDR

##*:void:sparc_print_register_hook:int regno:regno

#*:void:target_resume_hook:void

#*:void:target_wait_loop_hook:void

#*:void:init_gdb_hook:char *argv0:argv0

#*:void:command_loop_hook:void

#*:void:fputs_unfiltered_hook:const char *linebuff,struct ui_file *stream:linebuff, stream

#*:void:print_frame_info_listing_hook:struct symtab *s, int line, int stopline, int noerror:s, line, stopline, noerror

#*:int:query_hook:const char *query, va_list args:query, args

#*:void:warning_hook:const char *string, va_list args:string, args

#*:void:target_output_hook:char *b:b

#*:void:interactive_hook:void

#*:void:registers_changed_hook:void

#*:void:readline_begin_hook:char *format, ...:format

#*:char *:readline_hook:char *prompt:prompt

#*:void:readline_end_hook:void

#*:int:target_wait_hook:int pid, struct target_waitstatus *status:pid, status

#*:void:call_command_hook:struct cmd_list_element *c, char *cmd, int from_tty:c, cmd, from_tty

#*:NORETURN void:error_hook:void:: ATTR_NORETURN

#*:void:error_begin_hook:void

##*:int:target_architecture_hook:const struct bfd_arch_info *

#*:void:exec_file_display_hook:char *filename:filename

#*:void:file_changed_hook:char *filename:filename

##*:void:specify_exec_file_hook:

#*:int:gdb_load_progress_hook:char *section, unsigned long num:section, num

#*:void:pre_add_symbol_hook:char *name:name

#*:void:post_add_symbol_hook:void

#*:void:selected_frame_level_changed_hook:int level:level

#*:int:gdb_loop_hook:int signo:signo

##*:void:solib_create_inferior_hook:void

##*:void:xcoff_relocate_symtab_hook:unsigned int

EOF

  grep -v '^#'

}

copyright ()

{

  cat <<EOF

/* User Interface Events.

   Copyright 1999, 2001, 2002 Free Software Foundation, Inc.

   Contributed by Cygnus Solutions.

   This file is part of GDB.

   This program is free software; you can redistribute it and/or modify

   it under the terms of the GNU General Public License as published by

   the Free Software Foundation; either version 2 of the License, or

   (at your option) any later version.

   This program is distributed in the hope that it will be useful,

   but WITHOUT ANY WARRANTY; without even the implied warranty of

   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the

   GNU General Public License for more details.

   You should have received a copy of the GNU General Public License

   along with this program; if not, write to the Free Software

   Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.  */

/* Work in progress */

/* This file was created with the aid of \`\`gdb-events.sh''.

   The bourn shell script \`\`gdb-events.sh'' creates the files

   \`\`new-gdb-events.c'' and \`\`new-gdb-events.h and then compares

   them against the existing \`\`gdb-events.[hc]''.  Any differences

   found being reported.

   If editing this file, please also run gdb-events.sh and merge any

   changes into that script. Conversely, when making sweeping changes

   to this file, modifying gdb-events.sh and using its output may

   prove easier. */

EOF

}

#

# The .h file

#

exec > new-gdb-events.h

copyright

cat <<EOF

#ifndef GDB_EVENTS_H

#define GDB_EVENTS_H

#ifndef WITH_GDB_EVENTS

#define WITH_GDB_EVENTS 1

#endif

EOF

# pointer declarations

echo ""

echo ""

cat <<EOF

/* COMPAT: pointer variables for old, unconverted events.

   A call to set_gdb_events() will automatically update these. */

EOF

echo ""

function_list | while eval read $read

do

  case "${class}" in

    "*" )

        echo "extern ${returntype} (*${function}_event) (${formal})${attrib};"

        ;;

  esac

done

# function typedef's

echo ""

echo ""

cat <<EOF

/* Type definition of all hook functions.

   Recommended pratice is to first declare each hook function using

   the below ftype and then define it. */

EOF

echo ""

function_list | while eval read $read

do

  echo "typedef ${returntype} (gdb_events_${function}_ftype) (${formal});"

done

# gdb_events object

echo ""

echo ""

cat <<EOF

/* gdb-events: object. */

EOF

echo ""

echo "struct gdb_events"

echo "  {"

function_list | while eval read $read

do

  echo "    gdb_events_${function}_ftype *${function}${attrib};"

done

echo "  };"

# function declarations

echo ""

echo ""

cat <<EOF

/* Interface into events functions.

   Where a *_p() predicate is present, it must be called before

   calling the hook proper. */

EOF

function_list | while eval read $read

do

  case "${class}" in

    "*" ) continue ;;

    "?" )

        echo "extern int ${function}_p (void);"

        echo "extern ${returntype} ${function}_event (${formal})${attrib};"

        ;;

    "f" )

        echo "extern ${returntype} ${function}_event (${formal})${attrib};"

        ;;

  esac

done

# function macros

echo ""

echo ""

cat <<EOF

/* When GDB_EVENTS are not being used, completly disable them. */

EOF

echo ""

echo "#if !WITH_GDB_EVENTS"

function_list | while eval read $read

do

  case "${class}" in

    "*" ) continue ;;

    "?" )

        echo "#define ${function}_event_p() 0"

        echo "#define ${function}_event(${actual}) 0"

        ;;

    "f" )

        echo "#define ${function}_event(${actual}) 0"

        ;;

  esac

done

echo "#endif"

# our set function

cat <<EOF

/* Install custom gdb-events hooks. */

extern struct gdb_events *set_gdb_event_hooks (struct gdb_events *vector);

/* Deliver any pending events. */

extern void gdb_events_deliver (struct gdb_events *vector);

/* Clear event handlers */

extern void clear_gdb_event_hooks (void);

#if !WITH_GDB_EVENTS

#define set_gdb_events(x) 0

#define set_gdb_event_hooks(x) 0

#define gdb_events_deliver(x) 0

#endif

EOF

# close it off

echo ""

echo "#endif"

exec 1>&2

#../move-if-change new-gdb-events.h gdb-events.h

if test -r gdb-events.h

then

  diff -c gdb-events.h new-gdb-events.h

  if [ $? = 1 ]

  then

    echo "gdb-events.h changed? cp new-gdb-events.h gdb-events.h" 1>&2

  fi

else

  echo "File missing? mv new-gdb-events.h gdb-events.h" 1>&2

fi

#

# C file

#

exec > new-gdb-events.c

copyright

cat <<EOF

#include "defs.h"

#include "gdb-events.h"

#include "gdbcmd.h"

#if WITH_GDB_EVENTS

static struct gdb_events null_event_hooks;

static struct gdb_events queue_event_hooks;

static struct gdb_events *current_event_hooks = &null_event_hooks;

#endif

int gdb_events_debug;

EOF

# global pointer variables - always have this

#echo ""

#function_list | while eval read $read

#do

#  case "${class}" in

#    "*" )

#       echo "${returntype} (*${function}_event) (${formal})${attrib} = 0;"

#       ;;

#  esac

#done

# function bodies

echo ""

echo "#if WITH_GDB_EVENTS"

function_list | while eval read $read

do

  case "${class}" in

    "*" ) continue ;;

    "?" )

cat <<EOF

int

${function}_event_p (${formal})

{

  return current_event_hooks->${function};

}

${returntype}

${function}_event (${formal})

{

  return current_events->${function} (${actual});

}

EOF

        ;;

     "f" )

cat <<EOF

void

${function}_event (${formal})

{

  if (gdb_events_debug)

    fprintf_unfiltered (gdb_stdlog, "${function}_event\n");

  if (!current_event_hooks->${function})

    return;

  current_event_hooks->${function} (${actual});

}

EOF

        ;;

  esac

done

echo ""

echo "#endif"

# Set hooks function

echo ""

cat <<EOF

#if WITH_GDB_EVENTS

struct gdb_events *

set_gdb_event_hooks (struct gdb_events *vector)

{

  struct gdb_events *old_events = current_event_hooks;

  if (vector == NULL)

    current_event_hooks = &queue_event_hooks;

  else

    current_event_hooks = vector;

  return old_events;

EOF

function_list | while eval read $read

do

  case "${class}" in

    "*" )

      echo "  ${function}_event = hooks->${function};"

      ;;

  esac

done

cat <<EOF

}

#endif

EOF

# Clear hooks function

echo ""

cat <<EOF

#if WITH_GDB_EVENTS

void

clear_gdb_event_hooks (void)

{

  set_gdb_event_hooks (&null_event_hooks);

}

#endif

EOF

# event type

echo ""

cat <<EOF

enum gdb_event

{

EOF

function_list | while eval read $read

do

  case "${class}" in

    "f" )

      echo "  ${function},"

      ;;

  esac

done

cat <<EOF

  nr_gdb_events

};

EOF

# event data

echo ""

function_list | while eval read $read

do

  case "${class}" in

    "f" )

      if test ${actual}

      then

        echo "struct ${function}"

        echo "  {"

        echo "    `echo ${formal} | tr '[,]' '[;]'`;"

        echo "  };"

        echo ""

      fi

      ;;

  esac

done

# event queue

cat <<EOF

struct event

  {

    enum gdb_event type;

    struct event *next;

    union

      {

EOF

function_list | while eval read $read

do

  case "${class}" in

    "f" )

      if test ${actual}

      then

        echo "        struct ${function} ${function};"

      fi

      ;;

  esac

done

cat <<EOF

      }

    data;

  };

struct event *pending_events;

struct event *delivering_events;

EOF

# append

echo ""

cat <<EOF

static void

append (struct event *new_event)

{

  struct event **event = &pending_events;

  while ((*event) != NULL)

    event = &((*event)->next);

  (*event) = new_event;

  (*event)->next = NULL;

}

EOF

# schedule a given event

function_list | while eval read $read

do

  case "${class}" in

    "f" )

      echo ""

      echo "static void"

      echo "queue_${function} (${formal})"

      echo "{"

      echo "  struct event *event = XMALLOC (struct event);"

      echo "  event->type = ${function};"

      for arg in `echo ${actual} | tr '[,]' '[:]' | tr -d '[ ]'`; do

        echo "  event->data.${function}.${arg} = ${arg};"

      done

      echo "  append (event);"

      echo "}"

      ;;

  esac

done

# deliver

echo ""

cat <<EOF

void

gdb_events_deliver (struct gdb_events *vector)

{

  /* Just zap any events left around from last time. */

  while (delivering_events != NULL)

    {

      struct event *event = delivering_events;

      delivering_events = event->next;

      xfree (event);

    }

  /* Process any pending events.  Because one of the deliveries could

     bail out we move everything off of the pending queue onto an

     in-progress queue where it can, later, be cleaned up if

     necessary. */

  delivering_events = pending_events;

  pending_events = NULL;

  while (delivering_events != NULL)

    {

      struct event *event = delivering_events;

      switch (event->type)

        {

EOF

function_list | while eval read $read

do

  case "${class}" in

    "f" )

      echo "        case ${function}:"

      if test ${actual}

      then

        echo "          vector->${function}"

        sep="            ("

        ass=""

        for arg in `echo ${actual} | tr '[,]' '[:]' | tr -d '[ ]'`; do

          ass="${ass}${sep}event->data.${function}.${arg}"

          sep=",

               "

        done

        echo "${ass});"

      else

        echo "          vector->${function} ();"

      fi

      echo "          break;"

      ;;

  esac

done

cat <<EOF

        }

      delivering_events = event->next;

      xfree (event);

    }

}

EOF

# Finally the initialization

echo ""

cat <<EOF

void _initialize_gdb_events (void);

void

_initialize_gdb_events (void)

{

  struct cmd_list_element *c;

#if WITH_GDB_EVENTS

EOF

function_list | while eval read $read

do

  case "${class}" in

    "f" )

      echo "  queue_event_hooks.${function} = queue_${function};"

      ;;

  esac

done

cat <<EOF

#endif

  c = add_set_cmd ("eventdebug", class_maintenance, var_zinteger,

                   (char *) (&gdb_events_debug), "Set event debugging.\n\\

When non-zero, event/notify debugging is enabled.", &setlist);

  deprecate_cmd (c, "set debug event");

  deprecate_cmd (add_show_from_set (c, &showlist), "show debug event");

  add_show_from_set (add_set_cmd ("event",

                                  class_maintenance,

                                  var_zinteger,

                                  (char *) (&gdb_events_debug),

                                  "Set event debugging.\n\\

When non-zero, event/notify debugging is enabled.", &setdebuglist),

                     &showdebuglist);

}

EOF

# close things off

exec 1>&2

#../move-if-change new-gdb-events.c gdb-events.c

# Replace any leading spaces with tabs

sed < new-gdb-events.c > tmp-gdb-events.c \

    -e 's/\(    \)*        /\1  /g'

mv tmp-gdb-events.c new-gdb-events.c

# Move if changed?

if test -r gdb-events.c

then

  diff -c gdb-events.c new-gdb-events.c

  if [ $? = 1 ]

  then

    echo "gdb-events.c changed? cp new-gdb-events.c gdb-events.c" 1>&2

  fi

else

  echo "File missing? mv new-gdb-events.c gdb-events.c" 1>&2

fi