[PATCH bpf-next v2 0/8] tools: bpftool: visualization support for eBPF program

[Jakub Kicinski <jakub.kicinski@netronome.com>]

Jiong says:

This patch set is an application of CFG information on eBPF program
visualization. It presents some initial code for building CFG information
from eBPF instruction sequences.

After we get eBPF program bytecode, we do sub-program detection and
basic-block partition. These information then are visualized into DOT
graph.

The user could use any DOT graphic tools (xdot, graphviz etc) to view it.

For example:

  bpftool prog dump xlated id 2 visual &>output.dot

  [xdot | dotty] output.dot
  dot -Tpng -o output.png

This initial patch set hasn't tuned much on the dot description layout
nor decoration, we could improve them later once the direction of the patch
set is agreed on. We could also visualize some static analysis performance
data.

v2 (Jakub):
 - update license headers and add SPDX tags.

Jiong Wang (7):
  tools: bpftool: remove unnecessary 'if' to reduce indentation
  tools: bpftool: factor out xlated dump related code into separate file
  tools: bpftool: detect sub-programs from the eBPF sequence
  tools: bpftool: partition basic-block for each function in the CFG
  tools: bpftool: add out edges for each basic-block
  tools: bpftool: generate .dot graph from CFG information
  tools: bpftool: new command-line option and documentation for 'visual'

Quentin Monnet (1):
  tools: bpftool: add bash completion for CFG dump

 tools/bpf/bpftool/Documentation/bpftool-prog.rst |  18 +-
 tools/bpf/bpftool/bash-completion/bpftool        |  13 +-
 tools/bpf/bpftool/cfg.c                          | 514 +++++++++++++++++++++++
 tools/bpf/bpftool/cfg.h                          |  43 ++
 tools/bpf/bpftool/prog.c                         | 305 ++------------
 tools/bpf/bpftool/xlated_dumper.c                | 338 +++++++++++++++
 tools/bpf/bpftool/xlated_dumper.h                |  64 +++
 7 files changed, 1010 insertions(+), 285 deletions(-)
 create mode 100644 tools/bpf/bpftool/cfg.c
 create mode 100644 tools/bpf/bpftool/cfg.h
 create mode 100644 tools/bpf/bpftool/xlated_dumper.c
 create mode 100644 tools/bpf/bpftool/xlated_dumper.h

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2.15.1