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perf tools: Support --prefix/--prefix-strip

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The objdump utility has useful --prefix / --prefix-strip options to
allow changing source code file names hardcoded into executables' debug
info. Add options to 'perf report', 'perf top' and 'perf annotate',
which are then passed to objdump.

  $ mkdir foo
  $ echo 'main() { for (;;); }' > foo/foo.c
  $ gcc -g foo/foo.c
  foo/foo.c:1:1: warning: return type defaults to ‘int’ [-Wimplicit-int]
      1 | main() { for (;;); }
        | ^~~~
  $ perf record ./a.out
  ^C[ perf record: Woken up 1 times to write data ]
  [ perf record: Captured and wrote 0.230 MB perf.data (5721 samples) ]
  $ mv foo bar
  $ perf annotate
  <does not show source code>
  $ perf annotate --prefix=/home/ak/lsrc/git/bar --prefix-strip=5
  <does show source code>

Signed-off-by: Andi Kleen <ak@linux.intel.com>
Tested-by: Jiri Olsa <jolsa@redhat.com>
LPU-Reference: 20200107210444.214071-1-andi@firstfloor.org
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
This commit is contained in:
Andi Kleen 2020-01-07 13:04:44 -08:00 • committed by Arnaldo Carvalho de Melo
parent aa9d1f8334
commit 3b0b16bf8c
8 changed files with 61 additions and 2 deletions
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7
tools/perf/builtin-annotate.c
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@ -535,6 +535,10 @@ int cmd_annotate(int argc, const char **argv)
"Display raw encoding of assembly instructions (default)"),
OPT_STRING('M', "disassembler-style", &annotate.opts.disassembler_style, "disassembler style",
"Specify disassembler style (e.g. -M intel for intel syntax)"),
OPT_STRING(0, "prefix", &annotate.opts.prefix, "prefix",
"Add prefix to source file path names in programs (with --prefix-strip)"),
OPT_STRING(0, "prefix-strip", &annotate.opts.prefix_strip, "N",
"Strip first N entries of source file path name in programs (with --prefix)"),
OPT_STRING(0, "objdump", &annotate.opts.objdump_path, "path",
"objdump binary to use for disassembly and annotations"),
OPT_BOOLEAN(0, "group", &symbol_conf.event_group,
@ -574,6 +578,9 @@ int cmd_annotate(int argc, const char **argv)
annotate.sym_hist_filter = argv[0];
}
if (annotate_check_args(&annotate.opts) < 0)
return -EINVAL;
if (symbol_conf.show_nr_samples && annotate.use_gtk) {
pr_err("--show-nr-samples is not available in --gtk mode at this time\n");
return ret;