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f603e84ab7
When using global functions (i.e. subprogs), the verifier performs function-by-function verification. In that case, the sum of the instructions processed in each global function and in the main program counts towards the 1 million instructions limit. Only that sum is reported in the verifier logs. While starting to use global functions in Cilium (finally!), we found it can be useful to have the breakdown per global function, to understand exactly where the budget is currently spent. This patch implements this breakdown, under BPF_LOG_STATS, as done for the stack depths. When iterating over subprogs, we need to skip the hidden subprogs at the end because they don't have a corresponding func_info_aux entry and calling bpf_subprog_is_global() would result in an OOB access. Signed-off-by: Paul Chaignon <paul.chaignon@gmail.com> Link: https://lore.kernel.org/bpf/5590f9c67e614ec9054d0c7e74e87cc690a52c56.1777538384.git.paul.chaignon@gmail.com Signed-off-by: Kumar Kartikeya Dwivedi <memxor@gmail.com> |
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