Groups | Search | Server Info | Keyboard shortcuts | Login | Register [http] [https] [nntp] [nntps]

Groups > linux.kernel > #1470782

[PATCH v2 4/4] perf-probe: Ignore vmlinux Build-id when offline vmlinux given

Show all headers | View raw

Ignore vmlinux build-id when user gives offline vmlinux if
the command does not affect running kernel.
perf-probe has several actions some of them does not change
the running kernel, like --lines, --vars, and --funcs.

e.g.
  -----
  $ ./perf probe -k ./vmlinux-arm -V do_sys_open:14
  Available variables at do_sys_open:14
          @<do_sys_open+202>
                  char*   filename
                  int     dfd
                  int     fd
                  int     flags
                  struct filename*        tmp
                  struct open_flags       op
                  umode_t mode
  -----


Signed-off-by: Masami Hiramatsu <mhiramat@kernel.org>
---
 tools/perf/builtin-probe.c |   15 ++++++++-------
 1 file changed, 8 insertions(+), 7 deletions(-)

diff --git a/tools/perf/builtin-probe.c b/tools/perf/builtin-probe.c
index b4220cd..f87996b 100644
--- a/tools/perf/builtin-probe.c
+++ b/tools/perf/builtin-probe.c
@@ -611,6 +611,14 @@ __cmd_probe(int argc, const char **argv, const char *prefix __maybe_unused)
 	 */
 	symbol_conf.try_vmlinux_path = (symbol_conf.vmlinux_name == NULL);
 
+	/*
+	 * Except for --list, --del and --add, other command doesn't depend
+	 * nor change running kernel. So if user gives offline vmlinux,
+	 * ignore its buildid.
+	 */
+	if (!strchr("lda", params.command) && symbol_conf.vmlinux_name)
+		symbol_conf.ignore_vmlinux_buildid = true;
+
 	switch (params.command) {
 	case 'l':
 		if (params.uprobes) {
@@ -655,13 +663,6 @@ __cmd_probe(int argc, const char **argv, const char *prefix __maybe_unused)
 		}
 		break;
 	case 'D':
-		/*
-		 * If user gives offline vmlinux, ignore buildid, since
-		 * --definition doesn't change running kernel.
-		 */
-		if (symbol_conf.vmlinux_name)
-			symbol_conf.ignore_vmlinux_buildid = true;
-		/* fall through */
 	case 'a':
 
 		/* Ensure the last given target is used */

Back to linux.kernel | Previous | Next — Previous in thread | Next in thread | Find similar | Unroll thread

Thread

[PATCH v2 0/3] perf probe: Introduce remote cross-arch probes Masami Hiramatsu <mhiramat@kernel.org> - 2016-08-25 18:30 +0200
  [PATCH v2 3/3] perf-probe: Support probing on offline cross-arch binary Masami Hiramatsu <mhiramat@kernel.org> - 2016-08-25 18:30 +0200
    Re: [PATCH v2 3/3] perf-probe: Support probing on offline cross-arch  binary Arnaldo Carvalho de Melo <acme@kernel.org> - 2016-08-31 23:00 +0200
      Re: [PATCH v2 3/3] perf-probe: Support probing on offline  cross-arch binary Masami Hiramatsu <mhiramat@kernel.org> - 2016-09-01 01:30 +0200
    [tip:perf/core] perf probe: Support probing on offline cross-arch  binary tip-bot for Masami Hiramatsu <tipbot@zytor.com> - 2016-09-05 15:30 +0200
  [PATCH v2 1/3] perf-probe: Show trace event definition Masami Hiramatsu <mhiramat@kernel.org> - 2016-08-25 18:30 +0200
    [tip:perf/core] perf probe: Show trace event definition tip-bot for Masami Hiramatsu <tipbot@zytor.com> - 2016-09-05 15:30 +0200
  [PATCH v2 4/4] perf-probe: Ignore vmlinux Build-id when offline vmlinux given Masami Hiramatsu <mhiramat@kernel.org> - 2016-08-26 17:00 +0200
    [tip:perf/core] perf probe: Ignore vmlinux Build-id when offline  vmlinux given tip-bot for Masami Hiramatsu <tipbot@zytor.com> - 2016-09-05 15:30 +0200
  Re: [PATCH v2 0/3] perf probe: Introduce remote cross-arch probes Masami Hiramatsu <mhiramat@kernel.org> - 2016-08-31 03:10 +0200

csiph-web