Crash while opening/closing the Pd patch on Mac OSX

[cuinjune]

Hi, I found out ofxPd app crashes randomly while opening/closing Pd patches using pd.openPatch() and pd.closePatch() on Mac OSX.

Here's a simple example code you can test.

In ofApp.h

    ofxPd pd;
    Patch patch;
    bool isPatchOpened;
    int keyCount;

in ofApp.cpp

//--------------------------------------------------------------
void ofApp::setup() {

    ofSetFrameRate(60);
    ofSetVerticalSync(true);

    int ticksPerBuffer = 8;
    int numInputs = 1;

    ofSoundStreamSetup(2, numInputs, this, 44100, ofxPd::blockSize()*ticksPerBuffer, 3);

    if(!pd.init(2, numInputs, 44100, ticksPerBuffer, false)) {
        OF_EXIT_APP(1);
    }
    pd.addReceiver(*this);

    pd.start();

    isPatchOpened = false;
}

//--------------------------------------------------------------
void ofApp::update() {

    if (!isPatchOpened) {

        patch = pd.openPatch("pd/test.pd");
        isPatchOpened = true;
    }
    else {

        pd.closePatch(patch);
        isPatchOpened = false;
    }
    cout << "keyCount : " << ++keyCount << endl;

}

//--------------------------------------------------------------
void ofApp::draw() {

    ofSetColor(0, 255, 0);
    ofDrawRectangle(100, 100, 200, 200);

    if (isPatchOpened) {

        ofSetColor(255, 0, 0);
        ofDrawCircle(200, 200, 100);
    }
}

If you run the app, it will try to open and close a pd patch every frame. At some point, you will see the app crashing.

Sometimes, it also crashes on resizeBytes() or sometimes it crashed on some method in ofUtils.cpp

It seemed like the heavier patch I use, the earlier the crash occurred. So if you want to see the crash earlier, you can simply create [osc~] x 100 times on the empty patch and try with it.

I also tested this on iOS and Android but they both seemed to be working fine. So I'm guessing that it is a Mac OSX specific problem.

I used OF v0.9.8 on Mac OSX 10.11.6. I really hope it can be fixed.

Thank you.

[Miles-Tone]

heya! what mac have you tested this on? Im having problems with the newer MacBooks

[cuinjune]

@Miles-Tone Hi, I used MacBook Pro (Retina, Mid 2012)

[Miles-Tone]

Ah ok, so it seems like my issue and this one are similar, if not the same. It must be a problem for anything newer than the retina MacBooks, could it be an architecture issue. 32/64?

[Miles-Tone]

Have you tested it on an older mac?

[danomatika]

I found out ofxPd app crashes randomly while opening/closing Pd patches using pd.openPatch() and pd.closePatch() on Mac OSX.

Are you opening and closing patches every now and then or every update? I don't think you should expect to be able to constantly open/close patches 30-60 times a second as it takes a nominal amount of time to simply open and read a file...

[cuinjune]

Hey Dan. Thanks for your answer! My test code originally opens/closes a patch on key presses. And it crashed even when I slowly open and close the patch with key press events. It's just that the crash randomly occurred so I couldn't predict if it will crash on 100th or 1000th key press. That's why I moved opening/closing part to update() so that tester can quickly see the app crashing. And even if it opens/closes a patch 60 times a second, I think it should only slow down the app but not crash. I tested the same code on iOS and Android but it never crashed on these platforms but it certainly crashes on my Macbook Pro. I will also try this on Ubuntu and let you know if it crashes or not.

[cuinjune]

@Miles-Tone Hey Miles, No I haven't tested this on older Mac as this one is the only Mac I have now. ofxPd works fine on my Macbook Pro in general. It compiles and I can hear sound from Pd patch. I think you are having trouble with your newest Macbook Pro. Can you at least compile and run ofxPd/pdExample? Which OSX version do you use?

[Miles-Tone]

@cuinjune oh ok, thanks, sounds like something different is going on for me then, ill keep it in the other issue thread

[cuinjune]

I tried the test code on Ubuntu and it worked without the crash. So I'm pretty certain that it is Mac OS X specific problem.

[micuat]

@cuinjune I had similar issue while running pdExampleIOS on iPad 2. Since I deleted openPatch()'s except the very first one, the issue seems to be gone.

[danomatika]

Any updates on this? I just updated the libpd version.

[danomatika]

Closing due to inactivity.