2 Commits

Author	SHA1	Message	Date
Eduard Zingerman	8f7cf305a1	bpf: test the correct stack liveness of tail calls ... A new test is added: caller_stack_write_tail_call tests that the live stack is correctly tracked for a tail call. Signed-off-by: Eduard Zingerman <eddyz87@gmail.com> Signed-off-by: Martin Teichmann <martin.teichmann@xfel.eu> Link: https://lore.kernel.org/r/20251119160355.1160932-5-martin.teichmann@xfel.eu Signed-off-by: Alexei Starovoitov <ast@kernel.org>	2025-11-21 17:45:30 -08:00
Eduard Zingerman	fdcecdff90	selftests/bpf: test cases for callchain sensitive live stack tracking ... - simple propagation of read/write marks; - joining read/write marks from conditional branches; - avoid must_write marks in when same instruction accesses different stack offsets on different execution paths; - avoid must_write marks in case same instruction accesses stack and non-stack pointers on different execution paths; - read/write marks propagation to outer stack frame; - independent read marks for different callchains ending with the same function; - bpf_calls_callback() dependent logic in liveness.c:bpf_stack_slot_alive(). Signed-off-by: Eduard Zingerman <eddyz87@gmail.com> Link: https://lore.kernel.org/r/20250918-callchain-sensitive-liveness-v3-12-c3cd27bacc60@gmail.com Signed-off-by: Alexei Starovoitov <ast@kernel.org>	2025-09-19 09:27:24 -07:00