Move rt_regs from stack to record scratch#1286
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I was hoping for this PR to just be one commit relative to PR 1280 but GH requires base branch to be in this repo. |
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I think the commit to move |
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Yeah I can rebase this to main and make it standalone and pull this out of the commit set in #1288 |
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Rebased to main and RFAL. |
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@fabled @florianl @christos68k whats the best way to move this forward? I feel like I shouldn't bother rebasing/blob rebuilding again until it gets some green checkmarks... |
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Apr 15, 2026
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On arm64, rt_regs[34] consumes 272 bytes of the 512-byte BPF stack. When unwind_one_frame is inlined into interpreter unwinders, this exceeds the stack limit. Move rt_regs into the PerCPURecord scratch union which is already 1024+ bytes and unused during signal frame handling.
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rebased and python droppings removed |
This was referenced May 15, 2026
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This is another prep the patient PR for a hybrid python native unwinder. Combining the two unwinders exhausted the bpf stack and this fixes it.