1887689 - Re-enable the PoisonIOInterposer on Mac Nightly

Status: NEW

(Core :: Security: Process Sandboxing, task, P2)

Description

[Haik Aftandilian [:haik]]

Once bug 1474451 rides the trains to Release, re-enable the PoisonIOInterposer on Mac Nightly so that browser/base/content/test/performance/browser_startup_mainthreadio.js can continue to be used.

We should consider using DYLD_INSERT_LIBRARIES instead on Mac so that we don't need to add back com.apple.security.cs.allow-unsigned-executable-memory to Nightly.

Comment 1

[Haik Aftandilian [:haik]]

Attachment: WIP: Bug 1887689 - WIP - Re-enable the PoisonIOInterposer on Mac Nightly using a interposer library

Adds an interposing lib that intercepts variants of write, pwrite, aio_write calls so that the Mac PoisonIOInterposer can be used during tests without the use of the Mac entitlement com.apple.security.cs.allow-unsigned-executable-memory and mach_override_ptr.

The patches enable the interposer for the test browser_startup_content_mainthreadio.js when run as follows.

$ ./mach package
$ ./mach test --appname=dist browser/base/content/test/performance/browser_startup_content_mainthreadio.js

More work is needed to enable the interposer for browser_startup_content_mainthreadio.js.