Fix unwinder loading on 6.8 kernels #2667
Merged
Commits on Apr 26, 2024
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Fix unwinder loading on 6.8 kernels
See comments, and mailing list thread linked therein, for details. Before this change, recent kernels (6.8 and later) cannot verify the native unwinder, because improvements in the precision of register bounds tracking cause an explosion in state space resulting in exceeding the limit of 1 million instructions processed per load. This commit works around that issue, as the comment in the code explains.
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Do it with inline bytecode instead
This lets us inline the function without letting clang/llvm optimize out the double xor.
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