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Date: Sat, 17 Feb 2024 15:29:36 +0800
From: Changbin Du <changbin.du@...wei.com>
To: Adrian Hunter <adrian.hunter@...el.com>
CC: Namhyung Kim <namhyung@...nel.org>, Changbin Du <changbin.du@...wei.com>,
Peter Zijlstra <peterz@...radead.org>, Ingo Molnar <mingo@...hat.com>,
Arnaldo Carvalho de Melo <acme@...nel.org>, Mark Rutland
<mark.rutland@....com>, Alexander Shishkin
<alexander.shishkin@...ux.intel.com>, Jiri Olsa <jolsa@...nel.org>, Ian
Rogers <irogers@...gle.com>, <linux-kernel@...r.kernel.org>,
<linux-perf-users@...r.kernel.org>, Andi Kleen <ak@...ux.intel.com>, Thomas
Richter <tmricht@...ux.ibm.com>, <changbin.du@...il.com>
Subject: Re: [PATCH v7 0/5] perf: script: Intro capstone disasm engine to
show instruction trace
On Fri, Feb 16, 2024 at 01:20:31PM +0200, Adrian Hunter wrote:
> On 9/02/24 20:49, Namhyung Kim wrote:
> > Hello,
> >
> > For some reason, I cannot see Changbin's email in my mailbox. :(
> >
> > On Tue, Feb 6, 2024 at 3:50 AM Adrian Hunter <adrian.hunter@...el.com> wrote:
> >>
> >> On 6/02/24 13:29, Changbin Du wrote:
> >>> This series introduces capstone disassembler engine to print instructions of
> >>> Intel PT trace, which was printed via the XED tool.
> >>>
> >>> The advantages compared to XED tool:
> >>> * Support arm, arm64, x86-32, x86_64, s390 (more could be supported),
> >>> xed only for x86_64.
> >>> * More friendly to read. Immediate address operands are shown as symbol+offs.
> >>>
> >>> Display raw instructions:
> >>> $ sudo perf record --event intel_pt//u -- ls
> >>> $ sudo perf script --insn-trace
> >>> perf 17423 [000] 423271.557970005: 7f2d95f16217 __GI___ioctl+0x7 (/lib/x86_64-linux-gnu/libc-2.27.so) insn: 48 3d 01 f0 ff ff
> >>> perf 17423 [000] 423271.557970005: 7f2d95f1621d __GI___ioctl+0xd (/lib/x86_64-linux-gnu/libc-2.27.so) insn: 73 01
> >>> perf 17423 [000] 423271.557970338: 7f2d95f1621f __GI___ioctl+0xf (/lib/x86_64-linux-gnu/libc-2.27.so) insn: c3
> >>> perf 17423 [000] 423271.557970338: 5593ad3346d7 perf_evsel__enable_cpu+0x97 (/work/linux/tools/perf/perf) insn: 85 c0
> >>> perf 17423 [000] 423271.557970338: 5593ad3346d9 perf_evsel__enable_cpu+0x99 (/work/linux/tools/perf/perf) insn: 75 12
> >>> perf 17423 [000] 423271.557970338: 5593ad3346db perf_evsel__enable_cpu+0x9b (/work/linux/tools/perf/perf) insn: 49 8b 84 24 a8 00 00 00
> >>> perf 17423 [000] 423271.557970338: 5593ad3346e3 perf_evsel__enable_cpu+0xa3 (/work/linux/tools/perf/perf) insn: 48 8b 50 20
> >>>
> >>> Display mnemonic instructions:
> >>> $ sudo perf script --insn-trace=disasm
> >>> perf 17423 [000] 423271.557970005: 7f2d95f16217 __GI___ioctl+0x7 (/lib/x86_64-linux-gnu/libc-2.27.so) cmpq $-0xfff, %rax
> >>> perf 17423 [000] 423271.557970005: 7f2d95f1621d __GI___ioctl+0xd (/lib/x86_64-linux-gnu/libc-2.27.so) jae __GI___ioctl+0x10
> >>> perf 17423 [000] 423271.557970338: 7f2d95f1621f __GI___ioctl+0xf (/lib/x86_64-linux-gnu/libc-2.27.so) retq
> >>> perf 17423 [000] 423271.557970338: 5593ad3346d7 perf_evsel__enable_cpu+0x97 (/work/linux/tools/perf/perf) testl %eax, %eax
> >>> perf 17423 [000] 423271.557970338: 5593ad3346d9 perf_evsel__enable_cpu+0x99 (/work/linux/tools/perf/perf) jne perf_evsel__enable_cpu+0xad
> >>> perf 17423 [000] 423271.557970338: 5593ad3346db perf_evsel__enable_cpu+0x9b (/work/linux/tools/perf/perf) movq 0xa8(%r12), %rax
> >>> perf 17423 [000] 423271.557970338: 5593ad3346e3 perf_evsel__enable_cpu+0xa3 (/work/linux/tools/perf/perf) movq 0x20(%rax), %rdx
> >>> perf 17423 [000] 423271.557970338: 5593ad3346e7 perf_evsel__enable_cpu+0xa7 (/work/linux/tools/perf/perf) cmpl %edx, %ebx
> >>> perf 17423 [000] 423271.557970338: 5593ad3346e9 perf_evsel__enable_cpu+0xa9 (/work/linux/tools/perf/perf) jl perf_evsel__enable_cpu+0x60
> >>> perf 17423 [000] 423271.557970338: 5593ad3346eb perf_evsel__enable_cpu+0xab (/work/linux/tools/perf/perf) xorl %eax, %eax
> >>>
> >>> v7:
> >>> - remove redundant space for raw instruction.
> >>> - rename sample__fprintf_insn() as sample__fprintf_insn_asm() and make it empty if libcapstone is not available.
> >>> v6:
> >>> - make '-F +disasm' fatal if libcapstone is not supported. (Adrian Hunter)
> >>> - display with perf version --build-options. (Adrian Hunter)
> >>> - exclude libcapstone from make_minimal. (Adrian Hunter)
> >>> v5:
> >>> - fixes and improments suggested by Adrian Hunter
> >>> v4:
> >>> - rename 'insn_disam' to 'disasm' (Adrian Hunter)
> >>> v3:
> >>> - fix s390 detection. (Thomas Richter)
> >>> v2:
> >>> - add a new field 'insn_disam' instead of changing the default output.
> >>> - preserve the old --xed option.
> >>>
> >>> Changbin Du (5):
> >>> perf: build: introduce the libcapstone
> >>> perf: util: use capstone disasm engine to show assembly instructions
> >>> perf: script: add field 'disasm' to display mnemonic instructions
> >>> perf: script: add raw|disasm arguments to --insn-trace option
> >>> perf: script: prefer capstone to XED
> >>>
> >>> tools/build/Makefile.feature | 2 +
> >>> tools/build/feature/Makefile | 4 +
> >>> tools/build/feature/test-all.c | 4 +
> >>> tools/build/feature/test-libcapstone.c | 11 ++
> >>> tools/perf/Documentation/perf-intel-pt.txt | 14 ++-
> >>> tools/perf/Documentation/perf-script.txt | 20 +--
> >>> tools/perf/Makefile.config | 21 ++++
> >>> tools/perf/Makefile.perf | 3 +
> >>> tools/perf/builtin-script.c | 45 +++++--
> >>> tools/perf/builtin-version.c | 1 +
> >>> tools/perf/tests/make | 4 +-
> >>> tools/perf/ui/browsers/res_sample.c | 2 +-
> >>> tools/perf/ui/browsers/scripts.c | 2 +-
> >>> tools/perf/util/Build | 1 +
> >>> tools/perf/util/print_insn.c | 135 +++++++++++++++++++++
> >>> tools/perf/util/print_insn.h | 16 +++
> >>> 16 files changed, 258 insertions(+), 27 deletions(-)
> >>> create mode 100644 tools/build/feature/test-libcapstone.c
> >>> create mode 100644 tools/perf/util/print_insn.c
> >>> create mode 100644 tools/perf/util/print_insn.h
> >>>
> >>
> >> For whole patch set:
> >>
> >> Reviewed-by: Adrian Hunter <adrian.hunter@...el.com>
> >
> > Anyway, I see a build failure on Fedora 40.
> >
> > In file included from /usr/include/capstone/capstone.h:325,
> > from util/print_insn.c:29:
> > /usr/include/capstone/bpf.h:94:14: error: 'bpf_insn' defined as wrong
> > kind of tag
> > 94 | typedef enum bpf_insn {
> > | ^~~~~~~~
>
> libcapstone header files seem to trample on other namespaces.
Yes, the tag 'bpf_insn' are both defined by capstone/bpf.h and uapi/linux/bpf.h.
util/event.h
. /work/linux/tools/include/uapi/linux/stddef.h
. /work/linux/tools/perf/libperf/include/perf/event.h
.. /work/linux/tools/include/uapi/linux/perf_event.h
... /usr/include/linux/ioctl.h
.... /usr/include/asm/ioctl.h
..... /usr/include/asm-generic/ioctl.h
... /usr/include/asm/byteorder.h
.... /usr/include/linux/byteorder/little_endian.h
..... /usr/include/linux/swab.h
...... /work/linux/tools/perf/util/include/asm/swab.h
.. /usr/include/linux/limits.h
.. /work/linux/tools/include/uapi/linux/bpf.h
... /work/linux/tools/include/uapi/linux/bpf_common.h
> We might have to wrap the libcapstone API at some point, but
> for now I suggest avoiding including the conflicting headers
> in the same C file. Below works for me:
>
> diff --git a/tools/perf/util/print_insn.c b/tools/perf/util/print_insn.c
> index c10ccda529b13..459e0e93d7b1b 100644
> --- a/tools/perf/util/print_insn.c
> +++ b/tools/perf/util/print_insn.c
> @@ -7,7 +7,7 @@
> #include <string.h>
> #include <stdbool.h>
> #include "debug.h"
> -#include "event.h"
> +#include "sample.h"
> #include "symbol.h"
> #include "machine.h"
> #include "thread.h"
> diff --git a/tools/perf/util/thread.h b/tools/perf/util/thread.h
> index 0df775b5c1105..df344262eaee0 100644
> --- a/tools/perf/util/thread.h
> +++ b/tools/perf/util/thread.h
> @@ -13,7 +13,6 @@
> #include <strlist.h>
> #include <intlist.h>
> #include "rwsem.h"
> -#include "event.h"
> #include "callchain.h"
> #include <internal/rc_check.h>
>
This works for me, too. I'll include this fix and keep Adrian's Reviewed-by.
>
>
>
>
>
>
>
--
Cheers,
Changbin Du
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