1677882 - unreported memory from CookieJarSettings::Deserialize

Status: NEW

(Core :: Permission Manager, defect, P3)

Description

[Nika Layzell [:nika] (ni? for response)]

Attachment: Example filtered DMD log

When looking at a DMD report for the parent process, I noticed a relatively large number of unreported heap allocations from this code due to CookieJarSettings::Deserialize, in this particular case with a short-lived session totalling around 2MB.

The majority of these objects were allocated as part of creating HTTP connections from LoadInfoArgsToLoadInfo in HttpChannelParent.

Given that a nsICookieJarSettings object exists in the parent process already attached to WindowGlobalParent, it may be possible to avoid this duplication by having the parent process look up the requesting window with WindowGlobalParent::GetByInnerWindowId(loadInfoArgs.innerWindowId()), rather than deserializing their own copy.

Either way, it would also be good to report these allocations with the memory reporter.

Comment 1

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

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

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