Comment on Apple will start allowing emulators on the iOS App Store

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WolfLink@lemmy.ml ⁨6⁩ ⁨months⁩ ago

iOS natively supports JIT (by which we mean writable and executable memory) but Apple locks it down to only two use cases:

  1. The JavaScript engine in Safari
  2. Support for running a debugger

AltStore launches a debugger and connects it to your phone. Even though it’s not actually doing anything with a debugger, that’s enough to convince iOS to let your app use memory that’s both writable and executable (the key feature needed for JIT).

Without JIT you need to either resort to a slower form of emulation or do something creative.

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