[lldb][swift] Create thread plan for stepping through Allocating Init #10576
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These trampolines have a well defined target, which can be extracted from the demangle tree. A similar strategy is already adopted for stepping into conformance code. This allows LLDB to create a StepThrough plan with a target symbol, instead of a plan that keep taking steps until it reaches some interesting location. We already had a test for this, but we rely on the "step avoid libraries" setting to emulate the case of "avoid libraries without debug info". However, they are not exactly equivalent, so the test mislead us into believing stepping was working. A future patch should try to fold the setting-checking code into ThreadPlanShouldStopHere::DefaultShouldStopCallback. With this patch, the test now works regardless of whether debug info is present or not.
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These trampolines have a well defined target, which can be extracted from the demangle tree. A similar strategy is already adopted for stepping into conformance code. This allows LLDB to create a StepThrough plan with a target symbol, instead of a plan that keep taking steps until it reaches some interesting location.
We already had a test for this, but we rely on the "step avoid libraries" setting to emulate the case of "avoid libraries without debug info". However, they are not exactly equivalent, so the test mislead us into believing stepping was working. A future patch should try to fold the setting-checking code into
ThreadPlanShouldStopHere::DefaultShouldStopCallback.