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POpython memory leak, leaking frames
 

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  1. POpython memory leak, leaking frames
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    <p>I have this code to get the caller of my function's file name, line number, and function. It seems to be leaking frames though and I don't understand why. Is this just throwing me off and my leak must be elsewhere?</p> <pre><code> rv = "(unknown file)", 0, "(unknown function)" for f in inspect.stack()[1:]: if __file__ in f: continue else: rv = f[1:4] break return rv </code></pre> <p>I'm not saving a reference to the frame anywhere. But it's definitely frames that are leaking:</p> <pre> > objcallgraph.show_most_common_types() >tuple 24798 >frame 9601 >... </pre> <p><em>Update</em>: My frames are definitely being leaked. I did the suggestion about gc.set_debug() and frames are very slowly going into the gc.garbage list. Not even close to how many are being created though as show in show_most_common_types(). I have a question about scope though, in the above, doesn't <code>f</code> go out of scope after the for loop? Because I just tried this:</p> <pre><code> for f in range(20): l = 1 print f </code></pre> <p>and it printed 19. So could it be my <code>f</code> in the for loop leaking? This is a reference graph of a frame reference that was in my gc.garbage list:</p> <p><img src="https://i.stack.imgur.com/CxelP.png" alt="alt text"></p> <p><em>Update2</em>:</p> <p>It looks like the inspect module itself is holding references to the frames. This is an objectgraph of a backreference from a live frame, not one on the garbage list.</p> <p><img src="https://i.stack.imgur.com/UfjQ4.png" alt="alt text"></p> <p>Link <a href="https://i.stack.imgur.com/UfjQ4.png" rel="nofollow noreferrer">here</a> because it's too wide.</p> <p>Is there a way to clear the inspect module? Where the hell are these frames being saved =\</p>
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    1. COWhat do you do with the return rv?
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      1. USRussell Borogove
    2. COWhat does gc.set_debug(gc.DEBUG_LEAK) show? You should see leaked objects in its output.
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      1. USdcolish
    3. COI didn't even realize I could do that, I must have scanned over that in the doc. I'll see what that says tomorrow when I'm back at my computer
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