[PD] pdmax - broken pipe in macos?

[Lucas Cordiviola]

@Christof,

I think Joao is needing the *macOS* pdmax.

@Joao,

Everything that Christof said applies if you follow the macOS part:

https://github.com/pure-data/pure-data/blob/master/INSTALL.txt

you just need to install xcode with this command on a terminal:

     xcode-select --install

macOS debugger is included and its called (and invoked with) "lldb".

I used it one or two times only. I'm not a mac user.


--

Mensaje telepatico asistido por maquinas.

On 11/17/2021 10:32 AM, Christof Ressi wrote:
>
> You would have to build the pdmax external from source with debug 
> symbols to get meaningful information in the debugger. This means you 
> would need to setup Msys2, as described in the "Windows" section in 
> https://github.com/pure-data/pure-data/blob/master/INSTALL.txt.
>
> Actually, if the aim is to only get a stacktrace, it is not necessary 
> to install a graphical frontend for GDB, you can also run GDB from the 
> command line.
>
> I you never compiled somthing from source it can be a bit overwhelming 
> at first, but it's a valuable skill to have. There are a few Windows 
> people on the list who can help you out (including myself).
>
> So I would say it's not trivial, but also not impossible :-)
>
> ---
>
> That's what I'm doing to debug subprocesses (I also needed to do this 
> with [vstplugin~] a few times):
>
> 1) run Pd with DSP off and start the subprocess (here: [pd~ start()
>
> 2) find the PID of the subprocess, e.g. with "tasklist | grep <name>" 
> or with ProcessExplorer
>
> 3) attach to the subprocess; terminal: 
> https://stackoverflow.com/questions/14370972/how-to-attach-a-process-in-gdb; 
> Qt Creator: "Start Debuggin" -> "Attach to Running Application"
>
> 4) turn on DSP and wait for the subprocess to crash
>
> If the subprocess crashes immediately even with DSP turned off, things 
> are a bit harder.
>
> ---
>
> If you can build pdmax with Visual Studio (I don't know if this is 
> supported?) then things are even easier because VS has a very good 
> built-in graphical debugger that can also attach to running applications.
>
> Christof
>
> On 17.11.2021 14:04, João Pais wrote:
>> is that something a "normal user" like me (someone that only uses the 
>> surface of the software) can do, or it has to do with C or any other 
>> custom compiled/prepared versions?
>>
>> On Wed, 17 Nov 2021 at 01:06, Christof Ressi <info at christofressi.com> 
>> wrote:
>>
>>     You can attach GDB to a running or even a not-yet-running
>>     application.
>>     When that application crashes, you get a backtrace. That's how I
>>     found
>>     the crash in the [pd~] subprocess.
>>
>>     Personally, I use Qt Creator because it has a nice graphical
>>     front-end
>>     for GDB where I can easily step through functions while looking
>>     at the
>>     code, watch local variables, etc.
>>
>>     Christof
>>
>>     On 17.11.2021 00:49, Miller Puckette via Pd-list wrote:
>>     > If by any chance you're using pd 0.52 (test version) then I think
>>     > it can crash when used as a subprocess (this should be fixed
>>     for the next
>>     > test release).  If you're using Pd 0.51-4 the problem is
>>     something else.
>>     >
>>     > The "broken pipe" message means the subprocess died suddenly
>>     for some reason.
>>     > But I can't think of an easy way to figure out what killed it.
>>     >
>>     > cheers
>>     > Miller
>>     >
>>     > On Sat, Nov 06, 2021 at 08:45:28PM +0100, João Pais wrote:
>>     >> Hello list,
>>     >>
>>     >> I have a max patch with pd inside through the pd~ object. But
>>     I'm getting
>>     >> the "broken pipe" error in some cases in a mac, such as:
>>     >>
>>     >> - in a compiled standalone it usually works
>>     >>
>>     >> - in the original patch it doesn't
>>     >>
>>     >> - both patches were made in the same system, with the latest
>>     pdmax and pd
>>     >> versions were used. I'm not sure anymore which max version or
>>     macos system
>>     >> was used to compile the standalone, if that's important (it
>>     was either max 7
>>     >> or 8).
>>     >>
>>     >> I don't have access to a mac myself, but the system where it
>>     was tested was
>>     >> a 11.6, with Max 8. It seems to me that in some systems it
>>     works, and in
>>     >> other it doesn't - but I don't have enough hard data to prove it.
>>     >>
>>     >> Best,
>>     >>
>>     >> Joao
>>     >>
>>     >>
>>     >>
>>     >>
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