Changes between Version 6 and Version 7 of Abandoned documents


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Timestamp:
Aug 30, 2018, 2:26:47 PM (7 years ago)
Author:
Simon Fraser
Comment:

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  • Abandoned documents

    v6 v7  
    55All documents are referenced by Document::allDocumentsMap(), so they are not leaked in the sense that the 'leaks' tool doesn't show them.
    66
    7 = Why are layout test results showing me a list of abandoned documents? =
     7= Why are layout test results showing me a list of leaked documents? =
    88
    99Leaked documents usually entrain a lot of other objects, which can use lots of memory (e.g. via entries in the memory cache). Leaking documents is bad because it will cause ever-increasing memory use as the user browses. See [https://bugs.webkit.org/show_bug.cgi?id=186214]
    … …  
    1515= How do I debug document abandonment? =
    1616
    17 Let's take an example [https://bugs.webkit.org/show_bug.cgi?id=188722]. We run tests, checking for abandonment:
     17Let's take an example [https://bugs.webkit.org/show_bug.cgi?id=188722]. We run tests, checking for world leaks:
    1818
    1919{{{
    20 run-webkit-tests fast/forms/ --check-for-abandoned-documents
     20run-webkit-tests fast/forms/ --world-leaks
    2121}}}
    2222
    23 The results say that {{{fast/forms/textarea-paste-newline.html}}} was abandoned. Now you have to figure out why this Document object is not going away.
     23The results say that {{{fast/forms/textarea-paste-newline.html}}} was leaked. Now you have to figure out why this Document object is not going away.
    2424
    2525A bit of testing in MiniBrowser can be useful, and if you're lucky, the abandonment will reproduce there. To test this, do these steps: