[webkit-changes] [WebKit/WebKit] fa76f5: Simulator should have a 48-bit address space

[Justin Michaud]

  Branch: refs/heads/main
  Home:   https://github.com/WebKit/WebKit
  Commit: fa76f5ed3119f79bbbcd597e446cf201183b33b4
      https://github.com/WebKit/WebKit/commit/fa76f5ed3119f79bbbcd597e446cf201183b33b4
  Author: Justin Michaud <justin_michaud at apple.com>
  Date:   2023-07-10 (Mon, 10 Jul 2023)

  Changed paths:
    M Source/JavaScriptCore/runtime/StructureID.h
    M Source/WTF/wtf/CompactPtr.h
    M Source/WTF/wtf/PlatformHave.h
    M Source/WTF/wtf/PlatformOS.h
    M Source/bmalloc/bmalloc/BPlatform.h
    M Source/bmalloc/libpas/src/libpas/pas_root.c

  Log Message:
  -----------
  Simulator should have a 48-bit address space
https://bugs.webkit.org/show_bug.cgi?id=258999
rdar://111137299

Reviewed by Yusuke Suzuki.

If you allocate a lot of memory in the simulator, eventually you will
fail one of the CompactPtr assertions because the simulator actually
acts like macOS with respect to virtual memory.

Mach's max address size is defined incorrectly for this case, so we guard
against that on our side.

* Source/JavaScriptCore/runtime/StructureID.h:
* Source/WTF/wtf/CompactPtr.h:
* Source/WTF/wtf/PlatformHave.h:
* Source/WTF/wtf/PlatformOS.h:
* Source/bmalloc/bmalloc/BPlatform.h:
* Source/bmalloc/libpas/src/libpas/pas_root.c:

Canonical link: https://commits.webkit.org/265930@main