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Subject[RFC PATCH v2 00/15] perf bpf: Probing with local variable
Date
This is the 2nd version of perf bpf: Probing with local variable,
original discusions: https://lkml.org/lkml/2015/5/5/260.

Patches based on https://lkml.org/lkml/2015/5/17/84 (perf tools:
introduce 'perf bpf' command to load eBPF programs).

v1-v2:

- Copy bpf byte-code related headers to tools/lib/bpf.

- Combine pt_regs offset to arch_regs_table, and add
calling_regs_table.

- Support $params without debuginfo and use the same keyword for
generating bpf prologue without debuginfo.

- Save bpf prologue intermediate result to stack, so we can use the
4 regs(R2,R3,R4,R5) for variable passing according to bpf calling
convention.

- Move bpf prologue code to tools/lib/bpf.

- Sample codes in patch instead of comments.

- Fix code style problems mentioned by Alexei and Masami.

Thanks.

He Kuang (15):
perf tools: Add lib/bpf to cscope target list
perf bpf: Support custom vmlinux path
perf bpf: Save pt_regs info from debuginfo
perf tools: Add functions to get calling regs
perf tools: Add pt_regs offsets and calling regs for x86
bpf tools: Add headers for generating bpf bytecode
bpf tools: Convert arglist to bpf prologue
bpf tools: Fetch calling regs to bpf arglist
perf probe: Support $params without debuginfo
perf bpf: Process debuginfo for generating bpf prologue
perf bpf: Synthesize vars to generate bpf prologue
perf bpf: Generate bpf prologue without debuginfo
perf bpf: Combine bpf prologue and bpf prog
samples/bpf: Add sample for testing bpf fetch args
samples/bpf: Add sample for no-debuginfo case

samples/bpf/Makefile | 2 +
samples/bpf/sample_bpf_fetch_args.c | 62 +++++++
samples/bpf/sample_bpf_fetch_args_without_debug.c | 49 ++++++
tools/lib/bpf/Build | 2 +-
tools/lib/bpf/bpf.h | 187 +++++++++++++++++++++
tools/lib/bpf/gen_prologue.c | 127 ++++++++++++++
tools/lib/bpf/libbpf.c | 27 +++
tools/lib/bpf/libbpf.h | 14 ++
tools/perf/Makefile.perf | 2 +-
tools/perf/arch/x86/util/dwarf-regs.c | 100 ++++++++---
tools/perf/builtin-bpf.c | 3 +
tools/perf/util/bpf-loader.c | 27 +++
tools/perf/util/include/dwarf-regs.h | 15 ++
tools/perf/util/probe-event.c | 121 ++++++++++++++
tools/perf/util/probe-event.h | 3 +
tools/perf/util/probe-finder.c | 193 ++++++++++++++++++++++
tools/perf/util/probe-finder.h | 4 +
17 files changed, 915 insertions(+), 23 deletions(-)
create mode 100644 samples/bpf/sample_bpf_fetch_args.c
create mode 100644 samples/bpf/sample_bpf_fetch_args_without_debug.c
create mode 100644 tools/lib/bpf/gen_prologue.c

--
1.8.5.2



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