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Re: How to compare $arg0 with string literal?
- From: Doug Evans <dje at google dot com>
- To: Aleksey Midenkov <midenok at gmail dot com>
- Cc: "gdb at sourceware dot org" <gdb at sourceware dot org>
- Date: Fri, 27 Mar 2015 09:25:59 -0700
- Subject: Re: How to compare $arg0 with string literal?
- Authentication-results: sourceware.org; auth=none
- References: <CAF8BazAOQC-otNoogUc92mnjoxJwt8R166tx0=7JX04qFks_+g at mail dot gmail dot com> <CADPb22Rs0pEnF73E+3E46WPHNYhqpM0Lp2gm-Kws4mbYCcKGVg at mail dot gmail dot com> <CAF8BazDH4qpuAbakQ8u6C6C-OcHW-eZ1Yi09uNDu6s7R4SjV0g at mail dot gmail dot com>
On Thu, Mar 26, 2015 at 11:35 PM, Aleksey Midenkov <midenok@gmail.com> wrote:
> On Thu, Mar 26, 2015 at 9:28 PM, Doug Evans <dje@google.com> wrote:
>> Such things are not supported in gdb's own scripting language.
>> However, with a bit of Python-provided magic ($_streq):
>>
>> define logging
>> if $argc == 1
>> if $_streq("$arg0", "off")
>> set logging off
>> set logging file gdb.log
>> else
>> if $_streq("$arg0", "stop")
>> set logging off
>> else
>> set logging $arg0
>> end
>> end
>> else
>> set logging $arg0 $arg1
>> end
>> show logging
>> end
>>
>> Note that gdb's if/else syntax is a pain.
>
> Sure thing, gdb's syntax could be a bit richer... Also, if I get this
> error message does that mean that my gdb is not Python-powered?
>
> (gdb) p $_streq("off", "off")
> Invalid data type for function to be called.
I'd use "py print 42" or some such as a more direct test of whether
python is present.
btw, which version of gdb are you using?