perf annotate: Calculate the max instruction name, align column to that

We were hardcoding '6' as the max instruction name, and we have lots
that are longer than that, see the diff from two 'P' printed TUI
annotations for a libc function that uses instructions with long names,
such as 'vpmovmskb' with its 9 chars:

  --- __strcmp_avx2.annotation.before	2019-03-06 16:31:39.368020425 -0300
  +++ __strcmp_avx2.annotation	2019-03-06 16:32:12.079450508 -0300
  @@ -2,284 +2,284 @@
   Event: cycles:ppp

   Percent        endbr64
  -  0.10         mov    %edi,%eax
  +  0.10         mov        %edi,%eax
  -               xor    %edx,%edx
  +               xor        %edx,%edx
  -  3.54         vpxor  %ymm7,%ymm7,%ymm7
  +  3.54         vpxor      %ymm7,%ymm7,%ymm7
  -               or     %esi,%eax
  +               or         %esi,%eax
  -               and    $0xfff,%eax
  +               and        $0xfff,%eax
  -               cmp    $0xf80,%eax
  +               cmp        $0xf80,%eax
  -             ↓ jg     370
  +             ↓ jg         370
  - 27.07         vmovdqu (%rdi),%ymm1
  + 27.07         vmovdqu    (%rdi),%ymm1
  -  7.97         vpcmpeqb (%rsi),%ymm1,%ymm0
  +  7.97         vpcmpeqb   (%rsi),%ymm1,%ymm0
  -  2.15         vpminub %ymm1,%ymm0,%ymm0
  +  2.15         vpminub    %ymm1,%ymm0,%ymm0
  -  4.09         vpcmpeqb %ymm7,%ymm0,%ymm0
  +  4.09         vpcmpeqb   %ymm7,%ymm0,%ymm0
  -  0.43         vpmovmskb %ymm0,%ecx
  +  0.43         vpmovmskb  %ymm0,%ecx
  -  1.53         test   %ecx,%ecx
  +  1.53         test       %ecx,%ecx
  -             ↓ je     b0
  +             ↓ je         b0
  -  5.26         tzcnt  %ecx,%edx
  +  5.26         tzcnt      %ecx,%edx
  - 18.40         movzbl (%rdi,%rdx,1),%eax
  + 18.40         movzbl     (%rdi,%rdx,1),%eax
  -  7.09         movzbl (%rsi,%rdx,1),%edx
  +  7.09         movzbl     (%rsi,%rdx,1),%edx
  -  3.34         sub    %edx,%eax
  +  3.34         sub        %edx,%eax
     2.37         vzeroupper
                ← retq
                  nop
  -         50:   tzcnt  %ecx,%edx
  +         50:   tzcnt      %ecx,%edx
  -               movzbl 0x20(%rdi,%rdx,1),%eax
  +               movzbl     0x20(%rdi,%rdx,1),%eax
  -               movzbl 0x20(%rsi,%rdx,1),%edx
  +               movzbl     0x20(%rsi,%rdx,1),%edx
  -               sub    %edx,%eax
  +               sub        %edx,%eax
                  vzeroupper
                ← retq
  -               data16 nopw %cs:0x0(%rax,%rax,1)
  +               data16     nopw %cs:0x0(%rax,%rax,1)

Reported-by: Travis Downs <travis.downs@gmail.com>
LPU-Reference: CAOBGo4z1KfmWeOm6Et0cnX5Z6DWsG2PQbAvRn1MhVPJmXHrc5g@mail.gmail.com
Cc: Adrian Hunter <adrian.hunter@intel.com>
Cc: Jiri Olsa <jolsa@kernel.org>
Cc: Namhyung Kim <namhyung@kernel.org>
Link: https://lkml.kernel.org/n/tip-89wsdd9h9g6bvq52sgp6d0u4@git.kernel.org
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>

1 files changed, 4 insertions, 3 deletions

diff --git a/tools/perf/util/annotate.h b/tools/perf/util/annotate.h
index 95053cab41fe..df34fe483164 100644
--- a/tools/perf/util/annotate.h
+++ b/tools/perf/util/annotate.h
@@ -59,14 +59,14 @@ struct ins_ops {
 	void (*free)(struct ins_operands *ops);
 	int (*parse)(struct arch *arch, struct ins_operands *ops, struct map_symbol *ms);
 	int (*scnprintf)(struct ins *ins, char *bf, size_t size,
-			 struct ins_operands *ops);
+			 struct ins_operands *ops, int max_ins_name);
 };
 
 bool ins__is_jump(const struct ins *ins);
 bool ins__is_call(const struct ins *ins);
 bool ins__is_ret(const struct ins *ins);
 bool ins__is_lock(const struct ins *ins);
-int ins__scnprintf(struct ins *ins, char *bf, size_t size, struct ins_operands *ops);
+int ins__scnprintf(struct ins *ins, char *bf, size_t size, struct ins_operands *ops, int max_ins_name);
 bool ins__is_fused(struct arch *arch, const char *ins1, const char *ins2);
 
 #define ANNOTATION__IPC_WIDTH 6
@@ -219,7 +219,7 @@ int __annotation__scnprintf_samples_period(struct annotation *notes,
 					   struct perf_evsel *evsel,
 					   bool show_freq);
 
-int disasm_line__scnprintf(struct disasm_line *dl, char *bf, size_t size, bool raw);
+int disasm_line__scnprintf(struct disasm_line *dl, char *bf, size_t size, bool raw, int max_ins_name);
 size_t disasm__fprintf(struct list_head *head, FILE *fp);
 void symbol__calc_percent(struct symbol *sym, struct perf_evsel *evsel);
 
@@ -289,6 +289,7 @@ struct annotation {
 		u8		target;
 		u8		min_addr;
 		u8		max_addr;
+		u8		max_ins_name;
 	} widths;
 	bool			have_cycles;
 	struct annotated_source *src;