Bug 218269 – Use _CFURLConnectionSetFrameworkStubs for SecItemShim instead of DYLD_INTERPOSE on Apple Silicon Macs

• Component: New Bugs
• Status: RESOLVED FIXED

[Alex Christensen]

Use _CFURLConnectionSetFrameworkStubs instead of DYLD_INTERPOSE on Apple Silicon Macs

[Alex Christensen]

Created attachment 412493 [details]
Patch

[Darin Adler]

Comment on attachment 412493 [details]
Patch

View in context: https://bugs.webkit.org/attachment.cgi?id=412493&action=review

> Source/WebKit/Shared/mac/SecItemShim.cpp:146
> -#if PLATFORM(IOS_FAMILY)
> +#if PLATFORM(IOS_FAMILY) || (PLATFORM(MAC) && !CPU(X86_64))

How about this instead:

    #if !CPU(X86_64)

It doesn’t seem like we need IOS_FAMILY vs. MAC here.

> Source/WebKit/Shared/mac/SecItemShim.cpp:158
> -#if PLATFORM(MAC)
> +#if PLATFORM(MAC) && CPU(X86_64)

How about this instead:

    #if CPU(X86_64)

Or:

    #else

It doesn’t seem like we need IOS_FAMILY vs. MAC here.

Comment on attachment 412493 [details]
Patch

View in context: https://bugs.webkit.org/attachment.cgi?id=412493&action=review

>> Source/WebKit/Shared/mac/SecItemShim.cpp:146
>> +#if PLATFORM(IOS_FAMILY) || (PLATFORM(MAC) && !CPU(X86_64))
> 
> How about this instead:
> 
>     #if !CPU(X86_64)
> 
> It doesn’t seem like we need IOS_FAMILY vs. MAC here.

I believe the iOS Simulator is x86_64 but doesn’t have the interposing shim.

[Alex Christensen]

http://trac.webkit.org/r269094

[Radar WebKit Bug Importer]

<rdar://problem/70749479>

[Sam Weinig]

I would propose we use a more clear USE(DYLD_INTERPOSE_FOR_SEC_ITEM_SHIM) or something like that.

[Alex Christensen]

I would propose we stop using DYLD_INTERPOSE entirely and replace it with _CFURLConnectionSetFrameworkStubs in the short term and a per-NSURLSession solution I have yet to write in the long term.  Given the nature of this radar, though, I wanted the absolute minimum risk and the easiest cherry picking to the branch.