<div dir="ltr">I would suggest adding a test of another thread with a user provided stack<div>space that is properly aligned (e.g. array of double of minimum stack size</div><div>divided by sizeof(double)). This would give you known address range and</div><div>size for that thread.</div><div><br></div><div>For the case of RTEMS allocating the stack, the pointer returned to you</div><div>will vary based on the BSP and will essentially be random to the application.</div><div>If the application allocates it, then it knows the starting address.</div><div><br></div><div>You should be able to add that to the existing test without much trouble.</div><div><br></div><div>--joel</div><div><br></div></div><div class="gmail_extra"><br><div class="gmail_quote">On Sun, Sep 24, 2017 at 9:45 PM, <a href="mailto:xuelin.tian@qkmtech.com">xuelin.tian@qkmtech.com</a> <span dir="ltr"><<a href="mailto:xuelin.tian@qkmtech.com" target="_blank">xuelin.tian@qkmtech.com</a>></span> wrote:<br><blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex"><div>
<div><span></span>OK, I will try to do this.</div>
<div><br></div><hr style="width:210px;height:1px" color="#b5c4df" size="1" align="left">
<div><span><div style="MARGIN:10px;FONT-FAMILY:verdana;FONT-SIZE:10pt"><div>Best wishes,</div><div><a href="mailto:xuelin.tian@qkmtech.com" target="_blank">xuelin.tian@qkmtech.com</a></div></div></span></div>
<blockquote style="margin-top:0px;margin-bottom:0px;margin-left:0.5em"><div> </div><div style="border:none;border-top:solid #b5c4df 1.0pt;padding:3.0pt 0cm 0cm 0cm"><div style="PADDING-RIGHT:8px;PADDING-LEFT:8px;FONT-SIZE:12px;FONT-FAMILY:tahoma;COLOR:#000000;BACKGROUND:#efefef;PADDING-BOTTOM:8px;PADDING-TOP:8px"><div><b>From:</b> <a href="mailto:joel@rtems.org" target="_blank">Joel Sherrill</a></div><div><b>Date:</b> 2017-09-24 21:32</div><div><b>To:</b> <a href="mailto:xuelin.tian@qkmtech.com" target="_blank">xuelin.tian</a></div><div><b>CC:</b> <a href="mailto:users@rtems.org" target="_blank">rtems-users@rtems.org</a>; <a href="mailto:sebastian.huber@embedded-brains.de" target="_blank">Sebastian Huber</a></div><div><div class="h5"><div><b>Subject:</b> Re: Re: pthread_getattr_np does not work</div></div></div></div></div><div><div class="h5"><div><div class="m_1606057973027919872FoxDiv20170925104446357993"><div dir="auto">No. But you are welcome to submit patches so the behavior matches Linux.</div><div class="gmail_extra"><br><div class="gmail_quote">On Sep 24, 2017 1:09 AM, "xuelin.tian" <<a href="mailto:xuelin.tian@qkmtech.com" target="_blank">xuelin.tian@qkmtech.com</a>> wrote:<br type="attribution"><blockquote class="gmail_quote" style="margin:0px 0px 0px 0.8ex;border-left-width:1px;border-left-color:rgb(204,204,204);border-left-style:solid;padding-left:1ex"><div>So, is there a substitute function for this in RTEMS, without modifying the source code?</div><div><u></u><div> </div><div> </div><div style="font:Verdana normal 14px;color:#000"><div style="FONT-SIZE:12px;FONT-FAMILY:Arial Narrow;padding:2px 0 2px 0">------------------ Original --<wbr>----------------</div><div style="FONT-SIZE:12px;background:#efefef;padding:8px"><div id="m_1606057973027919872m_267109088197528173menu_sender"><b>From: </b> "Joel Sherrill"<<a href="mailto:joel@rtems.org" target="_blank">joel@rtems.org</a>>;</div><div><b>Date: </b> Sun, Sep 24, 2017 00:15 AM</div><div><b>To: </b> "xuelin.tian"<<a href="mailto:xuelin.tian@qkmtech.com" target="_blank">xuelin.tian@qkm<wbr>tech.com</a>>; </div><div><b>Cc: </b> "Sebastian Huber"<<a href="mailto:sebastian.huber@embedded-brains.de" target="_blank">sebastian.huber@embedde<wbr>d-brains.de</a>>; "<a href="mailto:users@rtems.org" target="_blank">users@rtems.org</a>"<<a href="mailto:users@rtems.org" target="_blank">users@rtems.<wbr>org</a>>; </div><div><b>Subject: </b> Re: Re: pthread_getattr_np does not work</div></div><div> </div><div dir="ltr"><br><div class="gmail_extra"><br><div class="gmail_quote">On Fri, Sep 22, 2017 at 9:26 PM, xuelin.tian <span dir="ltr"><<a href="mailto:xuelin.tian@qkmtech.com" target="_blank">xuelin.tian@qkmtech.com</a>></span> wrote:<br><blockquote class="gmail_quote" style="margin:0px 0px 0px 0.8ex;border-left-width:1px;border-left-color:rgb(204,204,204);border-left-style:solid;padding-left:1ex"><div>Thanks so much for your test. </div></blockquote><div><br></div><div>No problem. Just trying to help.</div><div> </div><blockquote class="gmail_quote" style="margin:0px 0px 0px 0.8ex;border-left-width:1px;border-left-color:rgb(204,204,204);border-left-style:solid;padding-left:1ex"><div>The parts of this structure I care about most are the stackaddr and stacksize (and guardsize maybe), where stackaddr always returns 0. The value of stacksize is either 8192 or 0, based on the fact that this attribute structure is retrieved from POSIX_Init or other pthreads in my system (maybe I use pthread_create in a wrong way...). </div></blockquote><div><br></div><div>Without looking at the code, 8192 is almost certainly the port specific default </div><div>stack size since it is normally a value like that. A stack size request of anything</div><div>less than the recommended minimum will always get you an allocation of the</div><div>minimum. So 0 or 8192 might simply indicate whether the structure is explicitly </div><div>initialized via pthread_attr_init() or filled in explicitly by the application with</div><div>the minimum stack size constant. </div><div> </div><blockquote class="gmail_quote" style="margin:0px 0px 0px 0.8ex;border-left-width:1px;border-left-color:rgb(204,204,204);border-left-style:solid;padding-left:1ex"><div><br></div><div>So, from the result you post, the stackaddr is 0 too, which means this element is not supported in rtems, or there is something wrong with this function?</div><div><u></u><div></div></div></blockquote><div><br></div><div>This means the user application didn't specify the stack area in RTEMS. Since</div><div>this method is "NP", there is no standard specifying the behavior.</div><div><br></div><div>This method doesn't exist on FreeBSD and appears to only exist in Linux and</div><div>RTEMS. If there is consensus that it should behave the same on Linux and</div><div>RTEMS, then there should be a ticket filed with (hopefully) patches. <hint></div><div><br></div><div>It isn't a complicated method and all if should take is filling in the attribute</div><div>structure with different fields in the TCB. I think it primarily parrots back</div><div>the attribute structure passed to pthread_create().</div><div><br></div><div>Also writing the man page for the RTEMS POSIX manual would be appreciated.</div><div><br></div><div>Nothing like wandering into something that is even beyond unspecified in</div><div>POSIX to a method that is explicitly non-portable for fun. :)</div><div><br></div><div>--joel</div><div><br></div><div>--joel</div><blockquote class="gmail_quote" style="margin:0px 0px 0px 0.8ex;border-left-width:1px;border-left-color:rgb(204,204,204);border-left-style:solid;padding-left:1ex"><div><div> </div><div> </div><div style="font:Verdana normal 14px;color:#000"><div style="FONT-SIZE:12px;FONT-FAMILY:Arial Narrow;padding:2px 0 2px 0">------------------ Original --<wbr>----------------</div><div style="FONT-SIZE:12px;background:#efefef;padding:8px"><div id="m_1606057973027919872m_267109088197528173m_-1040882363317489937menu_sender"><b>From: </b> "Joel Sherrill"<<a href="mailto:joel@rtems.org" target="_blank">joel@rtems.org</a>>;</div><div><b>Date: </b> Fri, Sep 22, 2017 10:15 PM</div><div><b>To: </b> "<a href="mailto:xuelin.tian@qkmtech.com" target="_blank">xuelin.tian@qkmtech.com</a>"<<a href="mailto:xuelin.tian@qkmtech.com" target="_blank">xue<wbr>lin.tian@qkmtech.com</a>>; </div><div><b>Cc: </b> "Sebastian Huber"<<a href="mailto:sebastian.huber@embedded-brains.de" target="_blank">sebastian.huber@embedde<wbr>d-brains.de</a>>; "<a href="mailto:users@rtems.org" target="_blank">users@rtems.org</a>"<<a href="mailto:users@rtems.org" target="_blank">users@rtems.<wbr>org</a>>; </div><div><b>Subject: </b> Re: Re: pthread_getattr_np does not work</div></div><div><div class="m_1606057973027919872m_267109088197528173h5"><div> </div><div dir="ltr">The test does verify the values. I don't see a specific case of creating a thread<div>with a non-standard stack value and verifying that value in the task but the</div><div>test creates a thread which retrieves its values and verifies many (most, all?)</div><div>of them:</div><div><br></div><div><div>(gdb) </div><div>Thread - pthread_getattr_np - Verify value</div><div>46 sc = pthread_getattr_np( Thread_id, &attr );</div><div>(gdb) </div><div>47 rtems_test_assert( sc == 0 );</div><div>(gdb) </div><div>52 puts( "Thread - pthread_setschedparam: Setting highest priority SCHED_FIFO" );</div><div>(gdb) p attr</div><div>$1 = {is_initialized = 1, stackaddr = 0x0, stacksize = 8192, </div><div> contentionscope = 0, inheritsched = 2, schedpolicy = 2, schedparam = {</div><div> sched_priority = 3, sched_ss_low_priority = 285216961, </div><div> sched_ss_repl_period = {tv_sec = 0, tv_nsec = 16}, </div><div> sched_ss_init_budget = {tv_sec = 0, tv_nsec = 1}, sched_ss_max_repl = 0}, </div><div> guardsize = 0, cputime_clock_allowed = 1, detachstate = 1, </div><div> affinitysetsize = 0, affinityset = 0x0, affinitysetpreallocated = {</div><div> __bits = {0}}}</div></div><div><br></div><div>Clearly the attribute structure returned is not all zero.</div><div><br></div><div>I am not sure what you are seeing but it doesn't match what I see in</div><div>this test on the erc32.</div><div><br></div><div>--joel</div></div><div class="gmail_extra"><br><div class="gmail_quote">On Fri, Sep 22, 2017 at 4:04 AM, <a href="mailto:xuelin.tian@qkmtech.com" target="_blank">xuelin.tian@qkmtech.com</a> <span dir="ltr"><<a href="mailto:xuelin.tian@qkmtech.com" target="_blank">xuelin.tian@qkmtech.com</a>></span> wrote:<br><blockquote class="gmail_quote" style="margin:0px 0px 0px 0.8ex;border-left-width:1px;border-left-color:rgb(204,204,204);border-left-style:solid;padding-left:1ex"><div>
<div><span></span>OK, no problem, thanks anyway.</div>
<div><br></div><hr style="width:210px;height:1px" color="#b5c4df" size="1" align="left">
<div><span><div style="MARGIN:10px;FONT-FAMILY:verdana;FONT-SIZE:10pt"><div>Best wishes,</div><div><a href="mailto:xuelin.tian@qkmtech.com" target="_blank">xuelin.tian@qkmtech.com</a></div></div></span></div>
<blockquote style="margin-top:0px;margin-bottom:0px;margin-left:0.5em"><div> </div><div style="border:none;border-top:solid #b5c4df 1.0pt;padding:3.0pt 0cm 0cm 0cm"><div style="PADDING-RIGHT:8px;PADDING-LEFT:8px;FONT-SIZE:12px;FONT-FAMILY:tahoma;COLOR:#000000;BACKGROUND:#efefef;PADDING-BOTTOM:8px;PADDING-TOP:8px"><div><b>From:</b> <a href="mailto:sebastian.huber@embedded-brains.de" target="_blank">Sebastian Huber</a></div><div><b>Date:</b> 2017-09-22 16:58</div><span><div><b>To:</b> <a href="mailto:xuelin.tian@qkmtech.com" target="_blank">xuelin.tian@qkmtech.com</a>; <a href="mailto:users@rtems.org" target="_blank">users@rtems.org</a></div><div><b>Subject:</b> Re: pthread_getattr_np does not work</div></span></div></div><span><div><div>On 22/09/17 10:55, <a href="mailto:xuelin.tian@qkmtech.com" target="_blank">xuelin.tian@qkmtech.com</a> wrote:</div>
<div> </div>
<div>> OK, I will try to do some fix on this function. And if Sherrill and </div>
<div>> you have time, please take some time on this. Thanks a lot.</div>
<div> </div>
<div>No, sorry. I have no time to fix this.</div>
<div> </div>
<div>-- </div>
<div>Sebastian Huber, embedded brains GmbH</div>
<div> </div>
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