1866606 - TaggedAnonymousMemory can support all Linux

Status: RESOLVED FIXED

(Core :: MFBT, enhancement)

Description

[:Benjamin Peterson]

prctl's PR_SET_VMA_ANON was originally an Android patch, but it's been supported by the upstream Linux kernel since 5.17. TaggedAnonymousMemory therefore has unnecessarily restrictive ANDROID ifdefs.

Comment 1

[:Benjamin Peterson]

Attachment: Bug 1866606 - Support TaggedAnonymousMemory on all Linux r?jld

Change ANDROID ifdefs to linux and allow PR_SET_VMA in the sandbox.

Comment 2

[:Benjamin Peterson]

Attachment: Bug 1866606 - Remove MozTaggedMemoryIsSupported. r?jld

MozTaggedMemoryIsSupported doesn't work under ASAN because it tries to prctl the
nullptr page. It should be harmless to simply call prctl and ignore the error.

Depends on D195064

Comment 3

[Pulsebot]

Pushed by [e-mail]:
https://hg.mozilla.org/integration/autoland/rev/6d4ddbd7c228
Support TaggedAnonymousMemory on all Linux r=jld
https://hg.mozilla.org/integration/autoland/rev/be94de3bcd0f
Remove MozTaggedMemoryIsSupported. r=jld

Comment 4

[Serban Stanca [:SerbanS]]

https://hg.mozilla.org/mozilla-central/rev/6d4ddbd7c228
https://hg.mozilla.org/mozilla-central/rev/be94de3bcd0f