96 lines
6.1 KiB
HTML
96 lines
6.1 KiB
HTML
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<meta name="DC.Type" content="task" />
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<meta name="DC.Title" content="Add conditional breakpoints" />
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<meta name="abstract" content="You can add a conditional breakpoint to a program that is being debugged using the Add Breakpoint (ADDBKP) command to specify the statement and condition." />
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<meta name="description" content="You can add a conditional breakpoint to a program that is being debugged using the Add Breakpoint (ADDBKP) command to specify the statement and condition." />
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<meta name="DC.subject" content="conditional breakpoint, adding, breakpoint, conditional, add, skip value, definition" />
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<meta name="DC.Relation" scheme="URI" content="../cl/addbkp.htm" />
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<title>Add conditional breakpoints</title>
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</head>
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<body id="addcbrkpt"><a name="addcbrkpt"><!-- --></a>
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<!-- Java sync-link --><script language="Javascript" src="../rzahg/synch.js" type="text/javascript"></script>
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<h1 class="topictitle1">Add conditional breakpoints</h1>
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<div><p>You can add a conditional breakpoint to a program that is being
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debugged using the <span class="cmdname">Add Breakpoint (ADDBKP)</span> command to specify
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the statement and condition. </p>
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<div class="section"> <p>If the condition is met, the system stops the program processing
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at the specified statement.</p>
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<p>You may specify a skip value on the <span class="cmdname">Add
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Breakpoint (ADDBKP)</span> command. A <strong>skip value</strong> is a number that
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indicates how many times a statement should be processed before the system
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stops the program. For example, to stop a program at statement 1200 after
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the statement has been processed 100 times, enter the following command: </p>
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<pre>ADDBKP STMT(1200) SKIP(100)</pre>
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<p>If you specify multiple statements when the SKIP parameter
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is specified, each statement has a separate count. The following command
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causes your program to stop on statement 150 or 200, but only after the statement
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has processed 400 times: </p>
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<pre>ADDBKP STMT(150 200) SKIP(400)</pre>
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<p>If statement 150 has processed 400 times but statement 200
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has processed only 300 times, then the program does not stop on statement
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200.</p>
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<p>If a statement has not processed as many times as was specified
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on the SKIP parameter, the <span class="cmdname">Display Breakpoint (DSPBKP)</span> command
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can be used to show how many times the statement was processed. To reset the
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SKIP count for a statement to zero, enter the breakpoint again for that statement.</p>
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<p>You
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can specify a more general breakpoint condition on the <span class="cmdname">Add Breakpoint
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(ADDBKP)</span> command. This expression uses a program variable, an operator,
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and another variable or constant as the operands. For example, to stop a
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program at statement 1500 when variable &X is greater than 1000, enter
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the following command: </p>
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<pre>ADDBKP STMT(1500) PGMVAR('&X') BKPCOND(*PGMVAR1 *GT 1000)</pre>
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<p>The BKPCOND parameter requires three values:</p>
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<ul><li>In the example, the first value specifies the first variable specified
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on the PGMVAR parameter. (To specify the third variable, you would use *PGMVAR3.)</li>
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<li>The second value must be an operator.</li>
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<li>The third value may be a constant or another variable. A constant may
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be a number, character string, or bit string, and must be the same type as
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the program variable specified in the first value.</li>
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</ul>
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<p>The SKIP and BKPCOND parameters can be used together to specify a
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complex breakpoint condition. For example, to stop a program on statement
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1000 after the statement has been processed 50 times <strong>and</strong> only when
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the character string &STR is <samp class="codeph">TRUE</samp>, enter the following
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command:</p>
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<pre>ADDBKP STMT(1000) PGMVAR('&STR') SKIP(50)
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BKPCOND(*PGMVAR1 *EQ 'TRUE ')</pre>
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</div>
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</div>
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<div>
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<div class="familylinks">
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<div class="parentlink"><strong>Parent topic:</strong> <a href="brkpt.htm" title="A breakpoint is a place in a program at which the system stops program processing and gives control to you at a display station (interactive mode) or to a program specified on the BKPPGM parameter in the Add Breakpoint (ADDBKP) command (batch mode).">Use breakpoints</a></div>
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</div>
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<div class="relref"><strong>Related reference</strong><br />
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<div><a href="rbam6opsinexp.htm" title="Operators are used in expressions to indicate an action to be performed on the operands in the expression or the relationship between the operands.">Operators in expressions</a></div>
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</div>
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<div class="relinfo"><strong>Related information</strong><br />
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<div><a href="../cl/addbkp.htm">Add Breakpoint (ADDBKP) command</a></div>
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<div><a href="../cl/dspbkp.htm">Display Breakpoint (DSPBKP) command</a></div>
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</div>
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</div>
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</body>
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</html>
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