1870590 - Unreported heap-unclassified memory for mozilla::safebrowsing::Classifier::UpdateTableV4

Status: NEW

(Toolkit :: Safe Browsing, defect, P3)

Description

[Henrik Skupin [:whimboo][⌚️UTC+2]]

Mozilla/5.0 (Macintosh; Intel Mac OS X 10.15; rv:122.0) Gecko/20100101 Firefox/122.0 ID:20231210093611

I can see unreported memory usage in about:memory for the parent process right after startup. Running with DMD enabled the following unreported Safe Browsing related stack is printed:

Unreported {
  52,189 blocks in heap block record 1 of 30,359
  13,360,384 bytes (12,942,872 requested / 417,512 slop)
  Individual block sizes: 256 x 52,189
  3.19% of the heap (3.19% cumulative)
  7.36% of unreported (7.36% cumulative)
  Allocated at {
    #01: replace_malloc(unsigned long) (/Applications/FirefoxNightly.app/Contents/MacOS/libmozglue.dylib + 0xa4f7c)
    #02: moz_xmalloc (/Applications/FirefoxNightly.app/Contents/MacOS/libmozglue.dylib + 0x6ff78)
    #03: nsTArrayInfallibleAllocator::ResultTypeProxy nsTArray_base<nsTArrayInfallibleAllocator, nsTArray_RelocateUsingMemutils>::EnsureCapacityImpl<nsTArrayInfallibleAllocator>(unsigned long, unsigned long) (/Applications/FirefoxNightly.app/Contents/MacOS/XUL + 0x32e9c4)
    #04: nsUrlClassifierPrefixSet::MakePrefixSet(unsigned int const*, unsigned int) (/Applications/FirefoxNightly.app/Contents/MacOS/XUL + 0x56b2e44)
    #05: nsUrlClassifierPrefixSet::SetPrefixes(unsigned int const*, unsigned int) (/Applications/FirefoxNightly.app/Contents/MacOS/XUL + 0x1a0f0c4)
    #06: mozilla::safebrowsing::VariableLengthPrefixSet::SetPrefixes(nsClassHashtable<nsIntegralHashKey<unsigned int, 0>, nsTString<char>>&) (/Applications/FirefoxNightly.app/Contents/MacOS/XUL + 0x56afed4)
    #07: mozilla::safebrowsing::LookupCacheV4::Build(nsClassHashtable<nsIntegralHashKey<unsigned int, 0>, nsTString<char>>&) (/Applications/FirefoxNightly.app/Contents/MacOS/XUL + 0x56bd89c)
    #08: mozilla::safebrowsing::Classifier::UpdateTableV4(nsTArray<RefPtr<mozilla::safebrowsing::TableUpdate>>&, nsTSubstring<char> const&) (/Applications/FirefoxNightly.app/Contents/MacOS/XUL + 0x56bbe1c)
  }
}

Comment 1

[BugBot [:suhaib / :marco/ :calixte]]

The severity field is not set for this bug.
:dlee, could you have a look please?

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