From mboxrd@z Thu Jan 1 00:00:00 1970 From: Arnaldo Carvalho de Melo Subject: [PATCH 31/69] perf trace: Associate the "msr" tracepoint arg name with x86_MSR__scnprintf() Date: Fri, 11 Oct 2019 17:05:21 -0300 Message-ID: <20191011200559.7156-32-acme@kernel.org> References: <20191011200559.7156-1-acme@kernel.org> Mime-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit Return-path: In-Reply-To: <20191011200559.7156-1-acme@kernel.org> Sender: linux-kernel-owner@vger.kernel.org To: Ingo Molnar , Thomas Gleixner Cc: Jiri Olsa , Namhyung Kim , Clark Williams , linux-kernel@vger.kernel.org, linux-perf-users@vger.kernel.org, Arnaldo Carvalho de Melo , Adrian Hunter , Brendan Gregg , =?UTF-8?q?Luis=20Cl=C3=A1udio=20Gon=C3=A7alves?= List-Id: linux-perf-users.vger.kernel.org From: Arnaldo Carvalho de Melo So that we can go from: # perf trace -e msr:write_msr --max-stack=16 sleep 1 0.000 sleep/6740 msr:write_msr(msr: 3221225728, val: 139636317451648) do_trace_write_msr ([kernel.kallsyms]) do_trace_write_msr ([kernel.kallsyms]) do_arch_prctl_64 ([kernel.kallsyms]) __x64_sys_arch_prctl ([kernel.kallsyms]) do_syscall_64 ([kernel.kallsyms]) entry_SYSCALL_64 ([kernel.kallsyms]) init_tls (/usr/lib64/ld-2.29.so) dl_main (/usr/lib64/ld-2.29.so) _dl_sysdep_start (/usr/lib64/ld-2.29.so) _dl_start (/usr/lib64/ld-2.29.so) # To: # perf trace -e msr:write_msr --max-stack=16 sleep 1 0.000 sleep/8519 msr:write_msr(msr: FS_BASE, val: 139878031705472) do_trace_write_msr ([kernel.kallsyms]) do_trace_write_msr ([kernel.kallsyms]) do_arch_prctl_64 ([kernel.kallsyms]) __x64_sys_arch_prctl ([kernel.kallsyms]) do_syscall_64 ([kernel.kallsyms]) entry_SYSCALL_64 ([kernel.kallsyms]) init_tls (/usr/lib64/ld-2.29.so) dl_main (/usr/lib64/ld-2.29.so) _dl_sysdep_start (/usr/lib64/ld-2.29.so) _dl_start (/usr/lib64/ld-2.29.so) # This, in reverse, will allow for symbolic system call/tracepoint filtering. Cc: Adrian Hunter Cc: Brendan Gregg Cc: Jiri Olsa Cc: Luis Cláudio Gonçalves Cc: Namhyung Kim Link: https://lkml.kernel.org/n/tip-q1q4unmqja5ex7dy0kb5cjaa@git.kernel.org Signed-off-by: Arnaldo Carvalho de Melo --- tools/perf/builtin-trace.c | 1 + 1 file changed, 1 insertion(+) diff --git a/tools/perf/builtin-trace.c b/tools/perf/builtin-trace.c index d52972ca6123..e9f132aa5a09 100644 --- a/tools/perf/builtin-trace.c +++ b/tools/perf/builtin-trace.c @@ -1480,6 +1480,7 @@ static int syscall__alloc_arg_fmts(struct syscall *sc, int nr_args) } static struct syscall_arg_fmt syscall_arg_fmts__by_name[] = { + { .name = "msr", .scnprintf = SCA_X86_MSR, } }; static int syscall_arg_fmt__cmp(const void *name, const void *fmtp) -- 2.21.0