Re: How to send signals to test programs?

[Andrew Cagney <cagney@redhat.com>]

Nurdin,

For this sort of testing, determinism is the key, so you'll want to have 
the program directly generate the signal, two ways:

-> cause an npe or similar
-> execute the kill system-call instruction

this can be done in assembler (see frysk-asm.h, and frysk-raise.S for 
example system calls).

Andrew


Nurdin Premji wrote:
> Trying to create a test for stepping over and through signals. I have 
> a simple the test program and I'm copying testcases from
> frysk-core/frysk/stepping/TestStepping.java
>
> How do I send a signal to my test program from the TestStepping test?
>
> Thank you,
> Nurdin
>
> funit-signal.c:
>
> #include <stdio.h>
> #include <unistd.h>
> #include <sys/types.h>
> #include <signal.h>
>
>
> volatile int j = 0;
>
> void catch_usr (int sig_num)
> {
>        signal(SIGUSR1, 
> catch_usr);                                             // 
> _signalSigHandlerEntry_
>        --j;
>        ++j;
> }
>
> int
> main ( int argc, char *argv[]) {
>
>        signal(SIGUSR1, catch_usr);
>
>        
> --j;                                                                    
> // _startTestEntry_
>        ++j;
>        return 0;
> }
>
>
> TestStepping.java addition:
>
> public void testStepThroughSignal() {
>        /** Variable setup */
>
>        String source = Config.getRootSrcDir()
>            + "frysk-core/frysk/pkglibdir/funit-signal.c";
>
>        this.scanner = new TestfileTokenScanner(new File(source));
>
>        /* The line number where the test begins */
>        int start = this.scanner.findTokenLine("_startTestEntry_");
>
>        /* The line number the test should end up at */
>        int end = this.scanner.findTokenLine("_signalSigHandlerEntry_");
>
>        /* The test process */
>        SynchronizedOffspring process
>            = new SynchronizedOffspring(Signal.USR1,
>                                        new String[] {
>                                            getExecPath("funit-signal")
>                                        });
>        this.testStarted = false;
>
>        /** Test initialization */
>        Task myTask = initTask(process, source, start, end);
>
>        this.currentTest = new AssertLine(end, myTask);
>
>        DebugInfoFrame frame = DebugInfoStackFactory
>            .createDebugInfoStackTrace(myTask);
>        assertTrue("Line information present", frame.getLine() != 
> SourceLocation.UNKNOWN);
>
>        /** The stepping operation */
>        this.se.stepLine(myTask);
>
>        /* TODO: Send Signal to myTask */
>
>        this.testStarted = true;
>
>        /** Run to completion */
>        assertRunUntilStop("Running test");
>        cleanup();
>    }
>