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.
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 | 510 +++++++++++++++++++++++
tools/bpf/bpftool/cfg.h | 39 ++
tools/bpf/bpftool/prog.c | 305 ++------------
tools/bpf/bpftool/xlated_dumper.c | 334 +++++++++++++++
tools/bpf/bpftool/xlated_dumper.h | 60 +++
7 files changed, 994 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
--
2.15.1
