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Re: how to continue from a breakpoint in GNU/Hurd

From: Yue Lu
Subject: Re: how to continue from a breakpoint in GNU/Hurd
Date: Thu, 18 Jul 2013 00:22:07 +0800

On Thu, Jul 18, 2013 at 12:13 AM, Richard Braun <rbraun@sceen.net> wrote:
> On Thu, Jul 18, 2013 at 12:07:20AM +0800, Yue Lu wrote:
>> when I used thread_info() to check the suspend count, they are zero.
>> But I met a strange thing.
>> this is my code snippet:
>> thread_basic_info_data_t _info;
>> thread_basic_info_t info = &_info;
>> mach_msg_type_number_t info_len = THREAD_BASIC_INFO_COUNT;
>> error_t err =
>>   thread_info (thread->port, THREAD_BASIC_INFO, (int *) &info, &info_len);
>> after this call, the info turn out to be a  _NULL_ pointer. I think
> If the info pointer is NULL, how do you determine the suspend count ?
I used this (&_info)->suspend_count to get the sc value.

> Something does look wrong. Check all the parameters of your call, one
> by one, rigorously.

The only one parameter I used is the first one, I give it as the
thread port, something like 119 (I have printf it), the left three
parameters are all the same as the code in gnu-nat.c.

Yue Lu (陆岳)

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