* more fortran problems
@ 2010-09-17 23:36 Mathew Yeates
2010-09-18 0:02 ` Michael Snyder
0 siblings, 1 reply; 5+ messages in thread
From: Mathew Yeates @ 2010-09-17 23:36 UTC (permalink / raw)
To: gdb
I am dealing with an array of logicals.
With the line
if (Tau_mask(itau,imix)) then
I type
(gdb) set Tau_mask(itau,imix) = .TRUE.
(gdb) print Tau_mask(itau,imix)
.TRUE.
.
but the code below the "if" statement isnt executed.
So, now I'm trying set the memory location.
(gdb) print &Tau_mask
$6 = (PTR TO -> ( logical(kind=4) (*,*))) 0x2859630
(gdb) set (int)0x2859630=.TRUE.
Left operand of assignment is not an lvalue
What am I doing wrong?
-Mathew
^ permalink raw reply [flat|nested] 5+ messages in thread
* Re: more fortran problems
2010-09-17 23:36 more fortran problems Mathew Yeates
@ 2010-09-18 0:02 ` Michael Snyder
2010-09-18 0:16 ` Mathew Yeates
2010-09-20 17:18 ` Doug Evans
0 siblings, 2 replies; 5+ messages in thread
From: Michael Snyder @ 2010-09-18 0:02 UTC (permalink / raw)
To: Mathew Yeates; +Cc: gdb
Mathew Yeates wrote:
> So, now I'm trying set the memory location.
> (gdb) print &Tau_mask
> $6 = (PTR TO -> ( logical(kind=4) (*,*))) 0x2859630
> (gdb) set (int)0x2859630=.TRUE.
> Left operand of assignment is not an lvalue
>
> What am I doing wrong?
This is not unique to Fortran. The usual gdb syntax for this would be
set *(int *) 0x2859630= [...]
^ permalink raw reply [flat|nested] 5+ messages in thread* Re: more fortran problems
2010-09-18 0:02 ` Michael Snyder
@ 2010-09-18 0:16 ` Mathew Yeates
2010-09-20 17:18 ` Doug Evans
1 sibling, 0 replies; 5+ messages in thread
From: Mathew Yeates @ 2010-09-18 0:16 UTC (permalink / raw)
To: Michael Snyder; +Cc: gdb
yeah, I finally got it. And now the code below the "if" statement is
being executed!
So .... this works but is kind of ugly. Maybe gdb is computing the
address incorrectly?
-Mathew
On Fri, Sep 17, 2010 at 5:02 PM, Michael Snyder <msnyder@vmware.com> wrote:
> Mathew Yeates wrote:
>
>> So, now I'm trying set the memory location.
>> (gdb) print &Tau_mask
>> $6 = (PTR TO -> ( logical(kind=4) (*,*))) 0x2859630
>> (gdb) set (int)0x2859630=.TRUE.
>> Left operand of assignment is not an lvalue
>>
>> What am I doing wrong?
>
> This is not unique to Fortran. The usual gdb syntax for this would be
>
> set *(int *) 0x2859630= [...]
>
>
^ permalink raw reply [flat|nested] 5+ messages in thread
* Re: more fortran problems
2010-09-18 0:02 ` Michael Snyder
2010-09-18 0:16 ` Mathew Yeates
@ 2010-09-20 17:18 ` Doug Evans
2010-09-20 17:24 ` Doug Evans
1 sibling, 1 reply; 5+ messages in thread
From: Doug Evans @ 2010-09-20 17:18 UTC (permalink / raw)
To: Michael Snyder; +Cc: Mathew Yeates, gdb
On Fri, Sep 17, 2010 at 5:02 PM, Michael Snyder <msnyder@vmware.com> wrote:
> Mathew Yeates wrote:
>
>> So, now I'm trying set the memory location.
>> (gdb) print &Tau_mask
>> $6 = (PTR TO -> ( logical(kind=4) (*,*))) 0x2859630
>> (gdb) set (int)0x2859630=.TRUE.
>> Left operand of assignment is not an lvalue
>>
>> What am I doing wrong?
>
> This is not unique to Fortran. The usual gdb syntax for this would be
>
> set *(int *) 0x2859630= [...]
[for reference sake]
There's also the gdb extension: set {int} 0x2859630 = [...]
^ permalink raw reply [flat|nested] 5+ messages in thread* Re: more fortran problems
2010-09-20 17:18 ` Doug Evans
@ 2010-09-20 17:24 ` Doug Evans
0 siblings, 0 replies; 5+ messages in thread
From: Doug Evans @ 2010-09-20 17:24 UTC (permalink / raw)
To: Michael Snyder; +Cc: Mathew Yeates, gdb
On Mon, Sep 20, 2010 at 10:18 AM, Doug Evans <dje@google.com> wrote:
> On Fri, Sep 17, 2010 at 5:02 PM, Michael Snyder <msnyder@vmware.com> wrote:
>> Mathew Yeates wrote:
>>
>>> So, now I'm trying set the memory location.
>>> (gdb) print &Tau_mask
>>> $6 = (PTR TO -> ( logical(kind=4) (*,*))) 0x2859630
>>> (gdb) set (int)0x2859630=.TRUE.
>>> Left operand of assignment is not an lvalue
>>>
>>> What am I doing wrong?
>>
>> This is not unique to Fortran. The usual gdb syntax for this would be
>>
>> set *(int *) 0x2859630= [...]
>
> [for reference sake]
>
> There's also the gdb extension: set {int} 0x2859630 = [...]
Heh, except this extension doesn't seem to have been added to the
fortran parser.
[I don't know fortran well enough to say that it's a good idea though.]
^ permalink raw reply [flat|nested] 5+ messages in thread
end of thread, other threads:[~2010-09-20 17:24 UTC | newest]
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2010-09-17 23:36 more fortran problems Mathew Yeates
2010-09-18 0:02 ` Michael Snyder
2010-09-18 0:16 ` Mathew Yeates
2010-09-20 17:18 ` Doug Evans
2010-09-20 17:24 ` Doug Evans
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