[tor-bugs] #21514 [Applications/Tor Browser]: Deal with W^X backport bustage in upcoming ESR release

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#21514: Deal with W^X backport bustage in upcoming ESR release
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 Reporter:  gk                        |          Owner:  arthuredelstein
     Type:  task                      |         Status:  needs_review
 Priority:  Very High                 |      Milestone:
Component:  Applications/Tor Browser  |        Version:
 Severity:  Critical                  |     Resolution:
 Keywords:  TorBrowserTeam201703R     |  Actual Points:
Parent ID:                            |         Points:
 Reviewer:                            |        Sponsor:
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Comment (by arthuredelstein):

 I used VMMap on Windows to examine the memory protections of gk's build
 from comment:8. Good news and bad news. The bad news is there was one 4k
 page with RWX  protection. The good news is that Jan helped me confirm
 that this block was far from (and therefore not part of) the 128 MB block
 allocated for the JIT. All the memory in the JIT block was RX or
 "Reserved".

 So I think my JIT `W^X` patch is also working correctly on Windows. But it
 would be good to track down the cause of the RWX block. I opened #21617 to
 look at this problem.

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Ticket URL: <https://trac.torproject.org/projects/tor/ticket/21514#comment:12>
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