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To: gdb@sources.redhat.com
From:  Vladimir Prus <vladimir@codesourcery.com>
Subject:  Re: Problem with "watch" on a new port.
Date: Wed, 01 Jul 2009 09:51:00 -0000
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Florent DEFAY wrote:

> Hi,
> 
> I am working on a new port for a 16 bit machine.
> 
> step, stepi, next, nexti, breakpoints work well.
> The problems come with "watch", it does not work :
> 
> (gdb) watch i
> Hardware watchpoint 2: i
> (gdb) c
> Continuing.
> Program received signal SIGTRAP, Trace/breakpoint trap.
> 0x00000174 in main () at main.c:67
> 67        for (i = 0; i < 10; i++)

This suggest you did not define, or improperly defined, the
to_stopped_by_watchpoint or to_stopped_data_address or
to_watchpoint_address_withing_range target methods.

> (gdb) c
> Continuing.
> Program received signal SIGTRAP, Trace/breakpoint trap.
> 0x0000019c in main () at main.c:67
> 67        for (i = 0; i < 10; i++)
> (gdb)
> 
> 
> or
> 
> 
> (gdb) watch results_16[0]
> (gdb) c
> Continuing.
> 
> and assignment of results_16[0] not detected.

Is this variable actually modified *before* the execution leaves
the current scope?

- Volodya