.TH XDBX 1 "July 25 1990" "X Version 11" .SH NAME xdbx \- X window system interface to the dbx debugger. .SH SYNOPSIS .B xdbx [ \fI-toolkitoption ... \fP] [\fI-xdbxoption ... \fP] [\fI-dbxoption ... \fP] [\fIobjfile\fP [ \fIcorefile\fP ]] .SH DESCRIPTION \fIXdbx\fP is a graphical user interface to the \fIdbx\fP debugger under the X Window System. It provides visual feedback and mouse input for the user to control program execution through breakpoints, to examine and traverse the function call stack, to display values of variables and data structures, and to browse source files and functions. .LP \fIXdbx\fP allows initial dbx commands stored in the file \fI.dbxinit\fP to be executed immediately after the symbolic information is read. If \fI.dbxinit\fP does not exist in the current directory, the user's home directory is searched (\fI~/.dbxinit\fP). .LP \fIObjfile\fP is an object file produced by a compiler with the appropriate option (-g) specified to produce symbol table information for dbx. For Sun dbx, if no \fIobjfile\fP is specified, the \fBdebug\fP command can be used later to specify the program to be debugged. .LP If a file named \fIcore\fP exists in the current directory or a \fIcorefile\fP is specified, \fIxdbx\fP can be used to examine the state of the program when the core dump occurred. .LP The name of the debugger invoked by \fIxdbx\fP is, by default, dbx, but it can be overridden with the environment variable DEBUGGER. .SH OPTIONS \fIXdbx\fP accepts all of the standard X Toolkit command line options (see \fIX\fP(1)), and all the dbx options (see \fIdbx\fP(1)), plus the following xdbx specific options: .IP -bigicon Uses a 64x64 icon instead of the default 48x48 icon. .SH SUBWINDOWS \fIXdbx\fP consists of the following subwindows: .IP "File Window" 20 Display the full pathname of the file displayed in the source window, and the line number of the caret. .IP "Source Window" 20 Display the contents of a source file. .IP "Message Window" 20 Display the execution status and error messages of \fIxdbx\fP . .IP "Command Window" 20 Provide a list of the common dbx commands which are invoked by simply clicking the LEFT mouse button. .IP "Dialogue Window" 20 Provide a typing interface to dbx. .IP "Display Window" 20 Provide a window for displaying variables each time execution stops. (Sun dbx only) .LP The relative sizes of the source window, command window, and the dialogue window can be adjusted by dragging the grip (a small square near the right edge of a horizontal border) with the LEFT mouse button down. .SH SELECTION Text selection in the source window is modified to make it easier to select C expressions. LEFT mouse button down selects a C expression by highlighting it in reverse-video. LEFT mouse button down also positions the caret and updates the line label accordingly. .LP C expression selection is based on the resource \fIdelimiters\fP which determines the set of characters that delimits a C expression. (The default word selection behavior in the Athena text widget selects a word delimited by white spaces.) Text selection adjustment is possible by holding the LEFT mouse button down and dragging. .LP A LEFT mouse button click with the SHIFT button down prints the value of the expression selected. .LP .SH SCROLLBAR Pressing the LEFT mouse button scrolls the text forward, whereas pressing the RIGHT mouse button scrolls the text backward. The amount of scrolling depends on the distance of the pointer button away from the top of the scrollbar. If the button is pressed at the top of the scrollbar, only one line of text is scrolled. If the button is pressed at the bottom of the scrollbar, one screenful of text is scrolled. .LP Pressing the MIDDLE mouse button changes the thumb position of the scrollbar. Dragging the MIDDLE mouse button down moves the thumb along and changes the text displayed. .SH COMMAND BUTTONS .SS "Execution Commands" .IP "\fBrun\fP" 12 Begin program execution. .IP "\fBcont\fP" Continue execution from where it stopped. .IP "\fBstep\fP" Execute one source line, stepping into a function if the source line contains a function call. .IP "\fBnext\fP" Execute one source line, without stepping into any function call. .IP "\fBreturn\fP" (Berkeley dbx only) Continue execution until the selected procedure returns; the current procedure is used if none is selected. .LP .SS "Breakpoint Commands" .IP "\fBstop at\fP" 10 Stop program execution at the line selected. To set a breakpoint in the program, place the caret on the source line and click the \fBstop at\fP button. A stop sign will appear next to the source line. .IP "\fBstop in\fP" Stop program execution in the function selected. To set a breakpoint in a function, select the function name and click the \fBstop in\fP button. A stop sign will be placed near the first executable line of the function. .IP "\fBdelete\fP" Remove the breakpoint on the source line selected or the breakpoint number selected. .IP "\fBstatus\fP" Show the current breakpoints and traces. .LP .SS "Stack Commands" .IP "\fBwhere\fP" 10 Show a stack trace of the functions called. .IP "\fBup\fP" Move up one level on the call stack. .IP "\fBdown\fP" Move down one level on the call stack. .LP .SS "Data Display Commands" .IP "\fBprint\fP" 10 Print the value of a selected expression. .IP "\fBprint *\fP" Print the value of the object the selected expression is pointing to. .IP "\fBdisplay\fP" Display the value of a selected expression in the display window, updating its value every time execution stops. (Sun dbx only) .IP "\fBundisplay\fP" Stop displaying the value of the selected expression in the display window. If the selected expression is a constant, it refers to the display number associated with an expression in the display window. (Sun dbx only) .IP "\fBdump\fP" Print the names and values of local variables and parameters in the current or selected function. .LP .SS "Miscellaneous Commands" .IP "\fBfunc\fP" Display a selected function on the source window, and change the scope for variable name resolution to the selected function. The file scope is changed to the file containing the function. .IP "\fBfile\fP" Pop up a directory browser that allows the user to move up and down in the directory tree, to select a text file to be displayed, or (in Sun dbx) to select an executable file to debug. Directory entries are marked with a trailing slash (`/') and executables with a trailing asterisk (`*'). Filenames beginning with a dot (`.') or ending with a tilde (`~') are not listed in the menu. .IP "\fBsearch\fP" Pop up a search panel which allows both forward (>>) and reverse (<<) search of text strings in the source file. Hitting carriage return after entering the search string will begin a forward search and pop down the search panel. .IP "\fBquit\fP" Exit \fIxdbx\fP. .LP .SS "Displaying C Data Structures (Sun dbx only)" \fIXdbx\fP provides some primitive support for graphically displaying C structures and the ability of following pointers. Pressing the RIGHT mouse button on the \fBprint\fP (or \fBprint *\fP) command button displays the value of the selected expression (or the value the selected expression is pointing to) in a popup. If the value is a pointer or a structure containing pointers, the user can examine the value of the object that pointer is pointing to by clicking the pointer value. This will create another popup that displays the object the pointer points to. Clicking the label of the popup pops down itself and all of its descendants. .SH X DEFAULTS To change the default values of widget resources used in \fIxdbx\fP, you need to reference the widgets by name or by class. The widget hierarchies for the main window, the file menu, the search dialog box, and the popup data display used in xdbx are shown as follows, with the name of the widget followed by the name of its class in parentheses: .nf Main window: toplevel (ToplevelShell) vpane (Paned) fileWindow (Form) fileLabel (Label) lineLabel (Label) sourceForm (Form) sourceWindow (AsciiText) messageWindow (Label) commandWindow (Box) run (Command) cont (Command) next (Command) return (Command) step (Command) stop at (Command) stop in (Command) delete (Command) where (Command) up (Command) down (Command) print (Command) print * (Command) func (Command) file (Command) status (Command) display (Command) undisplay (Command) dump (Command) search (Command) quit (Command) dialogWindow (AsciiText) displayWindow (AsciiText) File menu: File Directory (TransientShell) popup (Paned) fileMenuLabel (Label) fileMenu (List) cancelButton (Command) Search dialog box: Search (TransientShell) searchPopup (Dialog) << (Command) >> (Command) DONE (Command) Data display popup: Data Popup (TransientShell) popup (Form) label (Label) dataDpyWindow (AsciiText) .LP .fi In addition to the standard X resources, \fIxdbx\fP uses the following application-specific resources for user customization. The value in parentheses is the default value. .IP \fBbell\fP If True, the bell is on. (True) .IP \fBdisplayWindow\fP If True, the display window appears on start up. (False) .IP \fBdelimiters\fP The set of delimiters for word selection. (" !%^&*()+=~|;:{},/#