/usr/src/gnu/usr.bin/binutils/gdb/tui/tui-winsource.c

Bug Summary

File:	src/gnu/usr.bin/binutils/gdb/tui/tui-winsource.c
Warning:	line 589, column 3 Array access (via field 'content') results in a null pointer dereference

Annotated Source Code

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clang -cc1 -cc1 -triple amd64-unknown-openbsd7.0 -analyze -disable-free -disable-llvm-verifier -discard-value-names -main-file-name tui-winsource.c -analyzer-store=region -analyzer-opt-analyze-nested-blocks -analyzer-checker=core -analyzer-checker=apiModeling -analyzer-checker=unix -analyzer-checker=deadcode -analyzer-checker=security.insecureAPI.UncheckedReturn -analyzer-checker=security.insecureAPI.getpw -analyzer-checker=security.insecureAPI.gets -analyzer-checker=security.insecureAPI.mktemp -analyzer-checker=security.insecureAPI.mkstemp -analyzer-checker=security.insecureAPI.vfork -analyzer-checker=nullability.NullPassedToNonnull -analyzer-checker=nullability.NullReturnedFromNonnull -analyzer-output plist -w -setup-static-analyzer -mrelocation-model pic -pic-level 1 -pic-is-pie -mframe-pointer=all -relaxed-aliasing -fno-rounding-math -mconstructor-aliases -munwind-tables -target-cpu x86-64 -target-feature +retpoline-indirect-calls -target-feature +retpoline-indirect-branches -tune-cpu generic -debugger-tuning=gdb -fcoverage-compilation-dir=/usr/src/gnu/usr.bin/binutils/obj/gdb -resource-dir /usr/local/lib/clang/13.0.0 -D PIE_DEFAULT=1 -I . -I /usr/src/gnu/usr.bin/binutils/gdb -I /usr/src/gnu/usr.bin/binutils/gdb/config -D LOCALEDIR="/usr/share/locale" -D HAVE_CONFIG_H -I /usr/src/gnu/usr.bin/binutils/gdb/../include/opcode -I ../bfd -I /usr/src/gnu/usr.bin/binutils/gdb/../bfd -I /usr/src/gnu/usr.bin/binutils/gdb/../include -I ../intl -I /usr/src/gnu/usr.bin/binutils/gdb/../intl -D MI_OUT=1 -D TUI=1 -internal-isystem /usr/local/lib/clang/13.0.0/include -internal-externc-isystem /usr/include -O2 -fdebug-compilation-dir=/usr/src/gnu/usr.bin/binutils/obj/gdb -ferror-limit 19 -fwrapv -D_RET_PROTECTOR -ret-protector -fgnuc-version=4.2.1 -fcommon -vectorize-loops -vectorize-slp -fno-builtin-malloc -fno-builtin-calloc -fno-builtin-realloc -fno-builtin-valloc -fno-builtin-free -fno-builtin-strdup -fno-builtin-strndup -analyzer-output=html -faddrsig -D__GCC_HAVE_DWARF2_CFI_ASM=1 -o /home/ben/Projects/vmm/scan-build/2022-01-12-194120-40624-1 -x c /usr/src/gnu/usr.bin/binutils/gdb/tui/tui-winsource.c

1/* TUI display source/assembly window.

 Copyright 1998, 1999, 2000, 2001, 2002, 2003, 2004 Free Software
 Foundation, Inc.

 Contributed by Hewlett-Packard Company.

 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.  */

25#include "defs.h"
26#include <ctype.h>
27#include "symtab.h"
28#include "frame.h"
29#include "breakpoint.h"
30#include "value.h"
31#include "source.h"

33#include "tui/tui.h"
34#include "tui/tui-data.h"
35#include "tui/tui-stack.h"
36#include "tui/tui-win.h"
37#include "tui/tui-wingeneral.h"
38#include "tui/tui-winsource.h"
39#include "tui/tui-source.h"
40#include "tui/tui-disasm.h"

42#include "gdb_string.h"
43#include "gdb_curses.h"

45/* Function to display the "main" routine.  */
46void
47tui_display_main (void)
48{
if ((tui_source_windows ())->count > 0)
  {
    CORE_ADDR addr;

    addr = tui_get_begin_asm_address ();
    if (addr != (CORE_ADDR) 0)
{
 struct symtab_and_line sal;

 tui_update_source_windows_with_addr (addr);
 sal = find_pc_line (addr, 0);
        if (sal.symtab)
           tui_update_locator_filename (sal.symtab->filename);
        else
           tui_update_locator_filename ("??");
}
  }
66}



70/* Function to display source in the source window.  This function
 initializes the horizontal scroll to 0.  */
72void
73tui_update_source_window (struct tui_win_info * win_info, struct symtab *s,
	  union tui_line_or_address line_or_addr, int noerror)
75{
win_info->detail.source_info.horizontal_offset = 0;
tui_update_source_window_as_is (win_info, s, line_or_addr, noerror);

return;
80}


83/* Function to display source in the source/asm window.  This function
 shows the source as specified by the horizontal offset.  */
85void
86tui_update_source_window_as_is (struct tui_win_info * win_info, struct symtab *s,
		union tui_line_or_address line_or_addr, int noerror)
88{
enum tui_status ret;

if (win_info->generic.type == SRC_WIN)
  ret = tui_set_source_content (s, line_or_addr.line_no, noerror);
else
  ret = tui_set_disassem_content (line_or_addr.addr);

if (ret == TUI_FAILURE)
  {
    tui_clear_source_content (win_info, EMPTY_SOURCE_PROMPT1);
    tui_clear_exec_info_content (win_info);
  }
else
  {
    tui_update_breakpoint_info (win_info, 0);
    tui_show_source_content (win_info);
    tui_update_exec_info (win_info);
    if (win_info->generic.type == SRC_WIN)
{
 struct symtab_and_line sal;
 
 sal.line = line_or_addr.line_no +
   (win_info->generic.content_size - 2);
 sal.symtab = s;
 set_current_source_symtab_and_line (&sal);
 /*
    ** If the focus was in the asm win, put it in the src
    ** win if we don't have a split layout
  */
 if (tui_win_with_focus () == TUI_DISASM_WINtui_win_list[DISASSEM_WIN] &&
     tui_current_layout () != SRC_DISASSEM_COMMAND)
   tui_set_win_focus_to (TUI_SRC_WINtui_win_list[SRC_WIN]);
}
  }


return;
126}


129/* Function to ensure that the source and/or disassemly windows
 reflect the input address.  */
131void
132tui_update_source_windows_with_addr (CORE_ADDR addr)
133{
if (addr != 0)
  {
    struct symtab_and_line sal;
    union tui_line_or_address l;
    
    switch (tui_current_layout ())
{
case DISASSEM_COMMAND:
case DISASSEM_DATA_COMMAND:
 tui_show_disassem (addr);
 break;
case SRC_DISASSEM_COMMAND:
 tui_show_disassem_and_update_source (addr);
 break;
default:
 sal = find_pc_line (addr, 0);
 l.line_no = sal.line;
 tui_show_symtab_source (sal.symtab, l, FALSE0);
 break;
}
  }
else
  {
    int i;

    for (i = 0; i < (tui_source_windows ())->count; i++)
{
 struct tui_win_info * win_info = (struct tui_win_info *) (tui_source_windows ())->list[i];

 tui_clear_source_content (win_info, EMPTY_SOURCE_PROMPT1);
 tui_clear_exec_info_content (win_info);
}
  }
167}

169/* Function to ensure that the source and/or disassemly windows
 reflect the input address.  */
171void
172tui_update_source_windows_with_line (struct symtab *s, int line)
173{
CORE_ADDR pc;
union tui_line_or_address l;

switch (tui_current_layout ())
  {
  case DISASSEM_COMMAND:
  case DISASSEM_DATA_COMMAND:
    find_line_pc (s, line, &pc);
    tui_update_source_windows_with_addr (pc);
    break;
  default:
    l.line_no = line;
    tui_show_symtab_source (s, l, FALSE0);
    if (tui_current_layout () == SRC_DISASSEM_COMMAND)
{
 find_line_pc (s, line, &pc);
 tui_show_disassem (pc);
}
    break;
  }

return;
196}

198void
199tui_clear_source_content (struct tui_win_info * win_info, int display_prompt)
200{
if (win_info != NULL((void*)0))
  {
    int i;

    win_info->generic.content_in_use = FALSE0;
    tui_erase_source_content (win_info, display_prompt);
    for (i = 0; i < win_info->generic.content_size; i++)
{
 struct tui_win_element * element =
 (struct tui_win_element *) win_info->generic.content[i];
 element->which_element.source.has_break = FALSE0;
 element->which_element.source.is_exec_point = FALSE0;
}
  }
215}


218void
219tui_erase_source_content (struct tui_win_info * win_info, int display_prompt)
220{
int x_pos;
int half_width = (win_info->generic.width - 2) / 2;

if (win_info->generic.handle != (WINDOW *) NULL((void*)0))
  {
    werase (win_info->generic.handle);
    tui_check_and_display_highlight_if_needed (win_info);
    if (display_prompt == EMPTY_SOURCE_PROMPT1)
{
 char *no_src_str;

 if (win_info->generic.type == SRC_WIN)
   no_src_str = NO_SRC_STRING"[ No Source Available ]";
 else
   no_src_str = NO_DISASSEM_STRING"[ No Assembly Available ]";
 if (strlen (no_src_str) >= half_width)
   x_pos = 1;
 else
   x_pos = half_width - strlen (no_src_str);
 mvwaddstr (win_info->generic.handle,(wmove(win_info->generic.handle,(win_info->generic.height
 / 2),x_pos) == (-1) ? (-1) : waddnstr(win_info->generic.handle
,no_src_str,-1))
     (win_info->generic.height / 2),(wmove(win_info->generic.handle,(win_info->generic.height
 / 2),x_pos) == (-1) ? (-1) : waddnstr(win_info->generic.handle
,no_src_str,-1))
     x_pos,(wmove(win_info->generic.handle,(win_info->generic.height
 / 2),x_pos) == (-1) ? (-1) : waddnstr(win_info->generic.handle
,no_src_str,-1))
     no_src_str)(wmove(win_info->generic.handle,(win_info->generic.height
 / 2),x_pos) == (-1) ? (-1) : waddnstr(win_info->generic.handle
,no_src_str,-1));

 /* elz: added this function call to set the real contents of
    the window to what is on the  screen, so that later calls
    to refresh, do display
    the correct stuff, and not the old image */

 tui_set_source_content_nil (win_info, no_src_str);
}
    tui_refresh_win (&win_info->generic);
  }
254}


257/* Redraw the complete line of a source or disassembly window.  */
258static void
259tui_show_source_line (struct tui_win_info * win_info, int lineno)
260{
struct tui_win_element * line;
int x, y;

line = (struct tui_win_element *) win_info->generic.content[lineno - 1];
if (line->which_element.source.is_exec_point)
  wattron (win_info->generic.handle, A_STANDOUT)wattr_on(win_info->generic.handle, (attr_t)(((1U) <<
 ((8) + 8))), ((void*)0));

mvwaddstr (win_info->generic.handle, lineno, 1,(wmove(win_info->generic.handle,lineno,1) == (-1) ? (-1) :
 waddnstr(win_info->generic.handle,line->which_element.
source.line,-1))
           line->which_element.source.line)(wmove(win_info->generic.handle,lineno,1) == (-1) ? (-1) :
 waddnstr(win_info->generic.handle,line->which_element.
source.line,-1));
if (line->which_element.source.is_exec_point)
  wattroff (win_info->generic.handle, A_STANDOUT)wattr_off(win_info->generic.handle, (attr_t)(((1U) <<
 ((8) + 8))), ((void*)0));

/* Clear to end of line but stop before the border.  */
getyx (win_info->generic.handle, y, x)(y = ((win_info->generic.handle) ? (win_info->generic.handle
)->_cury : (-1)), x = ((win_info->generic.handle) ? (win_info
->generic.handle)->_curx : (-1)));
while (x + 1 < win_info->generic.width)
  {
    waddch (win_info->generic.handle, ' ');
    getyx (win_info->generic.handle, y, x)(y = ((win_info->generic.handle) ? (win_info->generic.handle
)->_cury : (-1)), x = ((win_info->generic.handle) ? (win_info
->generic.handle)->_curx : (-1)));
  }
280}

282void
283tui_show_source_content (struct tui_win_info * win_info)
284{
if (win_info->generic.content_size > 0)
  {
    int lineno;

    for (lineno = 1; lineno <= win_info->generic.content_size; lineno++)
      tui_show_source_line (win_info, lineno);
  }
else
  tui_erase_source_content (win_info, TRUE1);

tui_check_and_display_highlight_if_needed (win_info);
tui_refresh_win (&win_info->generic);
win_info->generic.content_in_use = TRUE1;
298}


301/* Scroll the source forward or backward horizontally.  */
302void
303tui_horizontal_source_scroll (struct tui_win_info * win_info,
	      enum tui_scroll_direction direction,
	      int num_to_scroll)
306{
if (win_info->generic.content != NULL((void*)0))
  {
    int offset;
    struct symtab *s;
    struct symtab_and_line cursal = get_current_source_symtab_and_line ();

    if (cursal.symtab == (struct symtab *) NULL((void*)0))
s = find_pc_symtab (get_frame_pc (deprecated_selected_frame));
    else
s = cursal.symtab;

    if (direction == LEFT_SCROLL)
offset = win_info->detail.source_info.horizontal_offset + num_to_scroll;
    else
{
 if ((offset =
    win_info->detail.source_info.horizontal_offset - num_to_scroll) < 0)
   offset = 0;
}
    win_info->detail.source_info.horizontal_offset = offset;
    tui_update_source_window_as_is (win_info, s,
		      ((struct tui_win_element *)
		       win_info->generic.content[0])->which_element.source.line_or_addr,
		      FALSE0);
  }

return;
334}


337/* Set or clear the has_break flag in the line whose line is line_no.  */
338void
339tui_set_is_exec_point_at (union tui_line_or_address l, struct tui_win_info * win_info)
340{
int changed = 0;
int i;
tui_win_content content = (tui_win_content) win_info->generic.content;

i = 0;
while (i < win_info->generic.content_size)
  {
    int new_state;

    if (content[i]->which_element.source.line_or_addr.addr == l.addr)
      new_state = TRUE1;
    else
new_state = FALSE0;
    if (new_state != content[i]->which_element.source.is_exec_point)
      {
        changed++;
        content[i]->which_element.source.is_exec_point = new_state;
        tui_show_source_line (win_info, i + 1);
      }
    i++;
  }
if (changed)
  tui_refresh_win (&win_info->generic);
364}

366/* Update the execution windows to show the active breakpoints.
 This is called whenever a breakpoint is inserted, removed or
 has its state changed.  */
369void
370tui_update_all_breakpoint_info (void)
371{
struct tui_list *list = tui_source_windows ();
int i;

for (i = 0; i < list->count; i++)
  {
    struct tui_win_info * win = (struct tui_win_info *) list->list[i];

    if (tui_update_breakpoint_info (win, FALSE0))
      {
        tui_update_exec_info (win);
      }
  }
384}


387/* Scan the source window and the breakpoints to update the
 has_break information for each line.
 Returns 1 if something changed and the execution window
 must be refreshed.  */
391int
392tui_update_breakpoint_info (struct tui_win_info * win, int current_only)
393{
int i;
int need_refresh = 0;
struct tui_source_info * src = &win->detail.source_info;

for (i = 0; i < win->generic.content_size; i++)
  {
    struct breakpoint *bp;
    extern struct breakpoint *breakpoint_chain;
    int mode;
    struct tui_source_element* line;

    line = &((struct tui_win_element *) win->generic.content[i])->which_element.source;
    if (current_only && !line->is_exec_point)
       continue;

    /* Scan each breakpoint to see if the current line has something to
       do with it.  Identify enable/disabled breakpoints as well as
       those that we already hit.  */
    mode = 0;
    for (bp = breakpoint_chain;
         bp != (struct breakpoint *) NULL((void*)0);
         bp = bp->next)
      {
        if ((win == TUI_SRC_WINtui_win_list[SRC_WIN]
             && bp->source_file
             && (strcmp (src->filename, bp->source_file) == 0)
             && bp->line_number == line->line_or_addr.line_no)
            || (win == TUI_DISASM_WINtui_win_list[DISASSEM_WIN]
                && bp->loc->address == line->line_or_addr.addr))
          {
            if (bp->enable_state == bp_disabled)
              mode |= TUI_BP_DISABLED0x02;
            else
              mode |= TUI_BP_ENABLED0x01;
            if (bp->hit_count)
              mode |= TUI_BP_HIT0x04;
            if (bp->cond)
              mode |= TUI_BP_CONDITIONAL0x08;
            if (bp->type == bp_hardware_breakpoint)
              mode |= TUI_BP_HARDWARE0x10;
          }
      }
    if (line->has_break != mode)
      {
        line->has_break = mode;
        need_refresh = 1;
      }
  }
return need_refresh;
443}


446/* Function to initialize the content of the execution info window,
 based upon the input window which is either the source or
 disassembly window.  */
449enum tui_status
450tui_set_exec_info_content (struct tui_win_info * win_info)
451{
enum tui_status ret = TUI_SUCCESS;

if (win_info->detail.source_info.execution_info != (struct tui_gen_win_info *) NULL((void*)0))
  {
    struct tui_gen_win_info * exec_info_ptr = win_info->detail.source_info.execution_info;

    if (exec_info_ptr->content == NULL((void*)0))
exec_info_ptr->content =
 (void **) tui_alloc_content (win_info->generic.height,
			 exec_info_ptr->type);
    if (exec_info_ptr->content != NULL((void*)0))
{
 int i;

        tui_update_breakpoint_info (win_info, 1);
 for (i = 0; i < win_info->generic.content_size; i++)
   {
     struct tui_win_element * element;
     struct tui_win_element * src_element;
            int mode;

     element = (struct tui_win_element *) exec_info_ptr->content[i];
     src_element = (struct tui_win_element *) win_info->generic.content[i];

            memset(element->which_element.simple_string, ' ',
                   sizeof(element->which_element.simple_string));
            element->which_element.simple_string[TUI_EXECINFO_SIZE4 - 1] = 0;

     /* Now update the exec info content based upon the state
               of each line as indicated by the source content.  */
            mode = src_element->which_element.source.has_break;
            if (mode & TUI_BP_HIT0x04)
              element->which_element.simple_string[TUI_BP_HIT_POS0] =
                (mode & TUI_BP_HARDWARE0x10) ? 'H' : 'B';
            else if (mode & (TUI_BP_ENABLED0x01 | TUI_BP_DISABLED0x02))
              element->which_element.simple_string[TUI_BP_HIT_POS0] =
                (mode & TUI_BP_HARDWARE0x10) ? 'h' : 'b';

            if (mode & TUI_BP_ENABLED0x01)
              element->which_element.simple_string[TUI_BP_BREAK_POS1] = '+';
            else if (mode & TUI_BP_DISABLED0x02)
              element->which_element.simple_string[TUI_BP_BREAK_POS1] = '-';

            if (src_element->which_element.source.is_exec_point)
              element->which_element.simple_string[TUI_EXEC_POS2] = '>';
   }
 exec_info_ptr->content_size = win_info->generic.content_size;
}
    else
ret = TUI_FAILURE;
  }

return ret;
505}


508void
509tui_show_exec_info_content (struct tui_win_info * win_info)
510{
struct tui_gen_win_info * exec_info = win_info->detail.source_info.execution_info;
int cur_line;

werase (exec_info->handle);
tui_refresh_win (exec_info);
for (cur_line = 1; (cur_line <= exec_info->content_size); cur_line++)
  mvwaddstr (exec_info->handle,(wmove(exec_info->handle,cur_line,0) == (-1) ? (-1) : waddnstr
(exec_info->handle,((struct tui_win_element *) exec_info->
content[cur_line - 1])->which_element.simple_string,-1))
      cur_line,(wmove(exec_info->handle,cur_line,0) == (-1) ? (-1) : waddnstr
(exec_info->handle,((struct tui_win_element *) exec_info->
content[cur_line - 1])->which_element.simple_string,-1))
      0,(wmove(exec_info->handle,cur_line,0) == (-1) ? (-1) : waddnstr
(exec_info->handle,((struct tui_win_element *) exec_info->
content[cur_line - 1])->which_element.simple_string,-1))
      ((struct tui_win_element *)(wmove(exec_info->handle,cur_line,0) == (-1) ? (-1) : waddnstr
(exec_info->handle,((struct tui_win_element *) exec_info->
content[cur_line - 1])->which_element.simple_string,-1))
exec_info->content[cur_line - 1])->which_element.simple_string)(wmove(exec_info->handle,cur_line,0) == (-1) ? (-1) : waddnstr
(exec_info->handle,((struct tui_win_element *) exec_info->
content[cur_line - 1])->which_element.simple_string,-1));
tui_refresh_win (exec_info);
exec_info->content_in_use = TRUE1;
524}


527void
528tui_erase_exec_info_content (struct tui_win_info * win_info)
529{
struct tui_gen_win_info * exec_info = win_info->detail.source_info.execution_info;

werase (exec_info->handle);
tui_refresh_win (exec_info);
534}

536void
537tui_clear_exec_info_content (struct tui_win_info * win_info)
538{
win_info->detail.source_info.execution_info->content_in_use = FALSE0;
tui_erase_exec_info_content (win_info);

return;
543}

545/* Function to update the execution info window.  */
546void
547tui_update_exec_info (struct tui_win_info * win_info)
548{
tui_set_exec_info_content (win_info);
tui_show_exec_info_content (win_info);
551}

553enum tui_status
554tui_alloc_source_buffer (struct tui_win_info *win_info)
555{
char *src_line_buf;
int i, line_width, max_lines;
enum tui_status ret = TUI_FAILURE;

max_lines = win_info->generic.height;	/* less the highlight box */
line_width = win_info->generic.width - 1;
/*
   ** Allocate the buffer for the source lines.  Do this only once since they
   ** will be re-used for all source displays.  The only other time this will
   ** be done is when a window's size changes.
 */
if (win_info->generic.content == NULL((void*)0))
1
Assuming field 'content' is equal to NULL→
2
←
Taking true branch→
  {
    src_line_buf = (char *) xmalloc ((max_lines * line_width) * sizeof (char));
    if (src_line_buf == (char *) NULL((void*)0))
3
←
Assuming 'src_line_buf' is equal to null→
4
←
Taking true branch→
fputs_unfiltered (
  "Unable to Allocate Memory for Source or Disassembly Display.\n",
	   gdb_stderr);
    else
{
 /* allocate the content list */
 if ((win_info->generic.content =
 (void **) tui_alloc_content (max_lines, SRC_WIN)) == NULL((void*)0))
   {
     xfree (src_line_buf);
     src_line_buf = (char *) NULL((void*)0);
     fputs_unfiltered (
		 "Unable to Allocate Memory for Source or Disassembly Display.\n",
		 gdb_stderr);
   }
}
    for (i = 0; i < max_lines; i++)
5
←
Assuming 'i' is < 'max_lines'→
6
←
Loop condition is true.  Entering loop body→
((struct tui_win_element *)
win_info->generic.content[i])->which_element.source.line =
7
←
Array access (via field 'content') results in a null pointer dereference
 src_line_buf + (line_width * i);
    ret = TUI_SUCCESS;
  }
else
  ret = TUI_SUCCESS;

return ret;
597}


600/* Answer whether the a particular line number or address is displayed
 in the current source window.  */
602int
603tui_line_is_displayed (int line, struct tui_win_info * win_info,
       int check_threshold)
605{
int is_displayed = FALSE0;
int i, threshold;

if (check_threshold)
  threshold = SCROLL_THRESHOLD2;
else
  threshold = 0;
i = 0;
while (i < win_info->generic.content_size - threshold && !is_displayed)
  {
    is_displayed = (((struct tui_win_element *)
      win_info->generic.content[i])->which_element.source.line_or_addr.line_no
     == (int) line);
    i++;
  }

return is_displayed;
623}


626/* Answer whether the a particular line number or address is displayed
 in the current source window.  */
628int
629tui_addr_is_displayed (CORE_ADDR addr, struct tui_win_info * win_info,
    int check_threshold)
631{
int is_displayed = FALSE0;
int i, threshold;

if (check_threshold)
  threshold = SCROLL_THRESHOLD2;
else
  threshold = 0;
i = 0;
while (i < win_info->generic.content_size - threshold && !is_displayed)
  {
    is_displayed = (((struct tui_win_element *)
      win_info->generic.content[i])->which_element.source.line_or_addr.addr
     == addr);
    i++;
  }

return is_displayed;
649}


652/*****************************************
653** STATIC LOCAL FUNCTIONS               **
654******************************************/