[Bug python/13473] New: step N/next N does not triggergdb.events.stop

["khooyp at cs dot umd.edu" <sourceware-bugzilla at sourceware dot org>]

http://sourceware.org/bugzilla/show_bug.cgi?id=13473

             Bug #: 13473
           Summary: step N/next N does not trigger gdb.events.stop
           Product: gdb
           Version: HEAD
            Status: NEW
          Severity: normal
          Priority: P2
         Component: python
        AssignedTo: unassigned@sourceware.org
        ReportedBy: khooyp@cs.umd.edu
    Classification: Unclassified


Created attachment 6091
  --> http://sourceware.org/bugzilla/attachment.cgi?id=6091
Fix "step N"/"next N" to trigger gdb.events.stop at breakpoints.

When using the "step N"/"next N" command (where N is given), and the program
stops before N due to a breakpoint, no events seem to be posted to
gdb.events.stop in Python. For example, for the following program:


int foo(int x) {
    x++;
    return x;
}

int main(void) {
    int i;
    for (i = 0; i < 4000; i++) {
        i = foo(i);
    }
    return 0;
}


The following transcript, run under GDB HEAD (as of Dec. 6, 2011), shows that
gdb.events.stop are not triggered for breakpoints:


(gdb) start
Temporary breakpoint 1 at 0x80483a6: file loop.c, line 9.
Starting program: /home/khooyp/tmp/loop 

Temporary breakpoint 1, main () at loop.c:9
9        for (i = 0; i < 4000; i++) {
(gdb) py def foo(s): print s
(gdb) py gdb.events.stop.connect(foo)
(gdb) b foo
Breakpoint 2 at 0x8048397: file loop.c, line 3.
(gdb) step 100

Breakpoint 2, foo (x=0) at loop.c:3
3        x++;
(gdb) next 100

Breakpoint 2, foo (x=2) at loop.c:3
3        x++;


I've attached a patch that fixes this problem. The patch leads to the following
transcript, which shows the breakpoint events being posted:


... as before ...
(gdb) step 100

Breakpoint 2, foo (x=0) at loop.c:3
3        x++;
<gdb.BreakpointEvent object at 0xb6ef6190>
(gdb) next 100

Breakpoint 2, foo (x=2) at loop.c:3
3        x++;
<gdb.BreakpointEvent object at 0xb6ef6190>

-- 
Configure bugmail: http://sourceware.org/bugzilla/userprefs.cgi?tab=email
------- You are receiving this mail because: -------
You are on the CC list for the bug.