Comments (1)
mattgallagher
commented on August 15, 2024
I've had a look at this. In Debug (-Onone), it is possible to walk through the stack frames to the message parameter passed to the underlying _assertionFailure function. It involves making some dirty assumptions about how many stack frames and the location within the stack frame but you can do it.
In Release build, it is not possible. The entire precondition (or other test function) is inlined into the caller and the message parameter is gone from the stack before the ud2 occurs.
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Related Issues (20)
- Unwind (upd'd)
- Occasional crashes when running tests HOT 4
- Under Xcode 9.3 catchBadInstruction no longer handles FatalError() HOT 5
- Runtime crash occurs on Xcode 10 beta 1 HOT 4
- CwlPreconditionTesting.framework/Modules/module.modulemap:9:12: Header 'CwlPreconditionTesting-Swift.h' not found HOT 3
- Undefined symbols for architecture x86_64: "_catchExceptionOfKind" HOT 2
- Can't be built for real devices (iOS and tvOS)
- Doesn't build with iOS 13.1 SDK HOT 1
- Darwin.framework in Xcode 11.4 is missing symbols HOT 2
- Apple Silicone Support HOT 15
- Compiler Error with Swift 5.5: symbol 'NDR_record' (NDR_record) is in generated IR file, but not in TBD file HOT 5
- Apple Silicon under Rosetta HOT 2
- Preconditions under Task with Swift Concurrency is not handled HOT 1
- Build Warning With Xcode 14 - 'mach_port_destroy' was deprecated in iOS 15.0 HOT 1
- Xcode 15 hangs indefinitely when an exception is catched HOT 1
- Update versions of CWLPreconditionTesting in Cocoapods HOT 5
- Intermittent: undeclared identifier 'BadInstructionException' HOT 2
- alternative to `setjmp` under new Swift releases HOT 15
- Return of the intermittent "undeclared identifier 'BadInstructionException'" error HOT 2
- master branch unavailable HOT 2
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