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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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19
tools/perf/util/annotate.c
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@@ -1966,14 +1966,20 @@ static int symbol__disassemble(struct symbol *sym, struct annotate_args *args)
err = asprintf(&command,
"%s %s%s --start-address=0x%016" PRIx64
" --stop-address=0x%016" PRIx64
" -l -d %s %s -C \"$1\"",
" -l -d %s %s %s %c%s%c %s%s -C \"$1\"",
opts->objdump_path ?: "objdump",
opts->disassembler_style ? "-M " : "",
opts->disassembler_style ?: "",
map__rip_2objdump(map, sym->start),
map__rip_2objdump(map, sym->end),
opts->show_asm_raw ? "" : "--no-show-raw-insn",
opts->annotate_src ? "-S" : "");
opts->annotate_src ? "-S" : "",
opts->prefix ? "--prefix " : "",
opts->prefix ? '"' : ' ',
opts->prefix ?: "",
opts->prefix ? '"' : ' ',
opts->prefix_strip ? "--prefix-strip=" : "",
opts->prefix_strip ?: "");
if (err < 0) {
pr_err("Failure allocating memory for the command to run\n");
@@ -3204,3 +3210,12 @@ out:
free(str1);
return err;
}
int annotate_check_args(struct annotation_options *args)
{
if (args->prefix_strip && !args->prefix) {
pr_err("--prefix-strip requires --prefix\n");
return -1;
}
return 0;
}