<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd"> <html> <head> <meta http-equiv="Content-Type" content="text/html; charset=iso-8859-1"> <meta name="Author" content="Johannes Sixt"> <title>KDbg - User's Manual - How Do I...?</title> </head> <body text="#000000" bgcolor="#FFFFFF"> <p><a href="index.html">Contents</a></p> <h1> How Do I...?</h1> <h4> ... set breakpoints?</h4> <p>There's more than one way to set a breakpoint:</p> <ul> <li> You can set it in the source window by clicking on the "active area" at the far left of the line.</li> <li> You can set it by selecting the line in the source window and choosing an option from the <i>Breakpoint</i> menu.</li> <li> You can set it in the <a href="breakptlist.html">breakpoint list</a>.</li> </ul> <p>If you can't set breakpoints, maybe the program is currently running. You can't set breakpoints while the program is running. Stop it first using <i>Execution|Break</i>. If you still can't set breakpoints, make sure that you have compiled <em>and linked</em> your program with debugging information enabled.</p> <h4> ... display the value of a global variable or an arbitrary expression?</h4> <p>Use the <A href="watches.html">Watch window</A>.</p> <h4> ... set watchpoints?</h4> <p>Watchpoints are manipulated in the <a href="breakptlist.html">breakpoint list</a>.</p> <h4> ... use a core dump?</h4> <p>First load the executable using <i>File|Executable</i>, then specify the core dump using <i>File|Core dump</i>.</p> <h4> ... debug a program that's caught in an endless loop?</h4> <p>Start the program and let it run until it is in the endless loop. Then switch to KDbg and choose <i>Execution|Break</i>. You've just caught the nasty program <em>in flagranti</em>!</p> <h4> ... achieve that the program passes over a breakpoint a number of times before it stops?</h4> <p>In the <a href="breakptlist.html">breakpoint list</a> select the breakpoint; then click <i>Conditional</i> and specify the number of times to skip the breakpoint in the <i>Ignore count</i> field.</p> <h4> ... set environment variables for the executable?</h4> <p>Select <i>Execution|Arguments</i> and specify the environment variables in the <a href="argspwdenv.html#Environment">program arguments dialog</a>.</p> <h4> ... set a working directory for the executable?</h4> <p>Select <i>Execution|Arguments</i> and specify the working directory in the <a href="argspwdenv.html#WorkingDir">program arguments dialog</a>.</p> <h4> ... get rid of this terminal window?</h4> <p>Select <i>Settings|This Program</i> and switch to the <a href="pgmsettings.html#output">Output</a> tab. Select <i>Only output, simple terminal emulation</i> and click <i>OK</i>. Now restart the program (choose it from the list under <i>File|Recent Executables</i>). The program output goes now to the built-in <a href="pgmoutput.html">output window</a> and stdin is redirected to <tt>/dev/null</tt>.</p> <p>You must do this for every new program that you debug.</p> <p><b><i>Important:</i></b> You should not do this if your program expects input from the terminal (usually stdin) or if its output requires nifty terminal emulation (more than carriage-return and line-feed). The built-in output window does not support input and terminal emulation.</p> </body> </html>