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Learn about implementing SFrame-based reliable stacktracing for Arm64 architecture in this Linux Plumbers Conference technical presentation. Discover how Google engineers Dylan Hatch and Weinan Liu propose using SFrame as a compiler-based solution to enable reliable stacktraces on Arm64, addressing the current limitation where the kernel lacks the objtool support needed to generate ORC unwind tables. Explore the technical challenges of implementing the Livepatch consistency model on Arm64, understand why existing solutions using objtool have faced upstream resistance, and examine how SFrame offers a generalized alternative inspired by the x86 ORC unwinder. Gain insights into the current state of Arm64 livepatch support expected in kernel v6.17, its limitations with interrupt stack tracing, and how this proposed SFrame implementation could provide the same level of reliable stacktrace support that x86 currently enjoys through ORC unwinding.
