perf script: Support DSO filter like in other perf tools

Other perf tool builtins already supported a DSO filter.

For example:

  $ perf report --dsos a,b,c

which only considers symbols in these dsos.

Now the DSO filter is supported in 'perf script':

  root@kbl-ppc:~# ./perf script --dsos "[kernel.kallsyms]"
            perf 18123 [000] 6142863.075104:          1   cycles:  ffffffff9ca77308 native_write_msr+0x8 ([kernel.kallsyms])
            perf 18123 [000] 6142863.075107:          1   cycles:  ffffffff9ca77308 native_write_msr+0x8 ([kernel.kallsyms])
            perf 18123 [000] 6142863.075108:         10   cycles:  ffffffff9ca77308 native_write_msr+0x8 ([kernel.kallsyms])
            perf 18123 [000] 6142863.075109:        273   cycles:  ffffffff9ca7730a native_write_msr+0xa ([kernel.kallsyms])
            perf 18123 [000] 6142863.075110:       7684   cycles:  ffffffff9ca3c9c0 native_sched_clock+0x50 ([kernel.kallsyms])
            perf 18123 [000] 6142863.075112:     213017   cycles:  ffffffff9d765a92 syscall_exit_to_user_mode+0x32 ([kernel.kallsyms])
            perf 18123 [001] 6142863.075156:          1   cycles:  ffffffff9ca77308 native_write_msr+0x8 ([kernel.kallsyms])
            perf 18123 [001] 6142863.075158:          1   cycles:  ffffffff9ca77308 native_write_msr+0x8 ([kernel.kallsyms])
            perf 18123 [001] 6142863.075159:         17   cycles:  ffffffff9ca77308 native_write_msr+0x8 ([kernel.kallsyms])

Committer testing:

  $ perf script
                ls 2364888 29303.010949:          1 cycles:u:  ffffffffa4bbc6a9 [unknown] ([unknown])
                ls 2364888 29303.010957:          1 cycles:u:  ffffffffa429ef48 [unknown] ([unknown])
                ls 2364888 29303.010961:          1 cycles:u:  ffffffffa4260133 [unknown] ([unknown])
                ls 2364888 29303.010964:          5 cycles:u:  ffffffffa429efad [unknown] ([unknown])
                ls 2364888 29303.010967:         41 cycles:u:  ffffffffa42a4586 [unknown] ([unknown])
                ls 2364888 29303.010972:        435 cycles:u:  ffffffffa429efe0 [unknown] ([unknown])
                ls 2364888 29303.010978:       5142 cycles:u:      7f9b95bc2abf __GI___tunables_init+0x11f (/usr/lib64/ld-2.32.so)
                ls 2364888 29303.011006:      38551 cycles:u:  ffffffffa4290f61 [unknown] ([unknown])
                ls 2364888 29303.011486:     238234 cycles:u:      7f9b95bb7741 _dl_relocate_object+0xa71 (/usr/lib64/ld-2.32.so)
                ls 2364888 29303.011937:     415870 cycles:u:      7f9b95a1c80e __strcoll_l+0xe (/usr/lib64/libc-2.32.so)
  $

Before:

  $ perf script --dsos /usr/lib64/libc-2.32.so |& head -5
    Error: unknown option `dsos'

   Usage: perf script [<options>]
      or: perf script [<options>] record <script> [<record-options>] <command>
      or: perf script [<options>] report <script> [script-args]
  $

After:

  $ perf script --dsos /usr/lib64/libc-2.32.so
                ls 2364888 29303.011937:     415870 cycles:u:      7f9b95a1c80e __strcoll_l+0xe (/usr/lib64/libc-2.32.so)
  $
Signed-off-by: Jin Yao <yao.jin@linux.intel.com>
Acked-by: Jiri Olsa <jolsa@kernel.org>
Tested-by: Arnaldo Carvalho de Melo <acme@redhat.com>
Cc: Alexander Shishkin <alexander.shishkin@linux.intel.com>
Cc: Andi Kleen <ak@linux.intel.com>
Cc: Jin Yao <yao.jin@intel.com>
Cc: Kan Liang <kan.liang@linux.intel.com>
Cc: Peter Zijlstra <peterz@infradead.org>
Link: http://lore.kernel.org/lkml/20210124232750.19170-2-yao.jin@linux.intel.comSigned-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>

tools/perf/Documentation/perf-script.txt

@@ -425,6 +425,9 @@ include::itrace.txt[]
 	For example, to select the symbol noploop or the address 0x4007a0:
 	perf script --symbols=noploop,0x4007a0
 
+--dsos=::
+	Only consider symbols in these DSOs.
+
 --call-trace::
 	Show call stream for intel_pt traces. The CPUs are interleaved, but
 	can be filtered with -C.

tools/perf/builtin-script.c

@@ -3548,6 +3548,8 @@ int cmd_script(int argc, const char **argv)
 		     parse_output_fields),
 	OPT_BOOLEAN('a', "all-cpus", &system_wide,
 		    "system-wide collection from all CPUs"),
+	OPT_STRING(0, "dsos", &symbol_conf.dso_list_str, "dso[,dso...]",
+		   "only consider symbols in these DSOs"),
 	OPT_STRING('S', "symbols", &symbol_conf.sym_list_str, "symbol[,symbol...]",
 		   "only consider these symbols"),
 	OPT_CALLBACK_OPTARG(0, "insn-trace", &itrace_synth_opts, NULL, NULL,