perf hists: Add support for header span

Add span argument for header callback function.

The handling of this argument is completely in the hands of the
callback. The only thing the caller ensures is it's zeroed on the
beginning.

Omitting span skipping in hierarchy headers and gtk code.

The c2c code use this to span header lines based on the entries span
configuration.

Signed-off-by: Jiri Olsa <jolsa@kernel.org>
Cc: David Ahern <dsahern@gmail.com>
Cc: Namhyung Kim <namhyung@kernel.org>
Cc: Peter Zijlstra <a.p.zijlstra@chello.nl>
Link: http://lkml.kernel.org/r/1470583710-1649-6-git-send-email-jolsa@kernel.org
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>

7 files changed, 25 insertions, 14 deletions

diff --git a/tools/perf/builtin-diff.c b/tools/perf/builtin-diff.c
index 75da965df343..9ff0db4e2d0c 100644
--- a/tools/perf/builtin-diff.c
+++ b/tools/perf/builtin-diff.c
@@ -1034,7 +1034,8 @@ static int hpp__entry_global(struct perf_hpp_fmt *_fmt, struct perf_hpp *hpp,
 
 static int hpp__header(struct perf_hpp_fmt *fmt, struct perf_hpp *hpp,
                        struct hists *hists __maybe_unused,
-                       int line __maybe_unused)
+                       int line __maybe_unused,
+                       int *span __maybe_unused)
 {
         struct diff_hpp_fmt *dfmt =
                 container_of(fmt, struct diff_hpp_fmt, fmt);
diff --git a/tools/perf/ui/browsers/hists.c b/tools/perf/ui/browsers/hists.c
index 4a7aac8ed5ee..22e48a3ebe29 100644
--- a/tools/perf/ui/browsers/hists.c
+++ b/tools/perf/ui/browsers/hists.c
@@ -1514,6 +1514,7 @@ hists_browser__scnprintf_headers(struct hist_browser *browser, char *buf,
         struct perf_hpp_fmt *fmt;
         size_t ret = 0;
         int column = 0;
+        int span = 0;
 
         if (symbol_conf.use_callchain) {
                 ret = scnprintf(buf, size, "  ");
@@ -1525,10 +1526,13 @@ hists_browser__scnprintf_headers(struct hist_browser *browser, char *buf,
                 if (perf_hpp__should_skip(fmt, hists)  || column++ < browser->b.horiz_scroll)
                         continue;
 
-                ret = fmt->header(fmt, &dummy_hpp, hists, line);
+                ret = fmt->header(fmt, &dummy_hpp, hists, line, &span);
                 if (advance_hpp_check(&dummy_hpp, ret))
                         break;
 
+                if (span)
+                        continue;
+
                 ret = scnprintf(dummy_hpp.buf, dummy_hpp.size, "  ");
                 if (advance_hpp_check(&dummy_hpp, ret))
                         break;
@@ -1562,7 +1566,7 @@ static int hists_browser__scnprintf_hierarchy_headers(struct hist_browser *brows
                 if (column++ < browser->b.horiz_scroll)
                         continue;
 
-                ret = fmt->header(fmt, &dummy_hpp, hists, 0);
+                ret = fmt->header(fmt, &dummy_hpp, hists, 0, NULL);
                 if (advance_hpp_check(&dummy_hpp, ret))
                         break;
 
@@ -1599,7 +1603,7 @@ static int hists_browser__scnprintf_hierarchy_headers(struct hist_browser *brows
                         }
                         first_col = false;
 
-                        ret = fmt->header(fmt, &dummy_hpp, hists, 0);
+                        ret = fmt->header(fmt, &dummy_hpp, hists, 0, NULL);
                         dummy_hpp.buf[ret] = '\0';
 
                         start = trim(dummy_hpp.buf);
diff --git a/tools/perf/ui/gtk/hists.c b/tools/perf/ui/gtk/hists.c
index 79cb5c4d5e2e..a4f02de7c1b5 100644
--- a/tools/perf/ui/gtk/hists.c
+++ b/tools/perf/ui/gtk/hists.c
@@ -549,7 +549,7 @@ static void perf_gtk__show_hierarchy(GtkWidget *window, struct hists *hists,
                                 strcat(buf, "+");
                         first_col = false;
 
-                        fmt->header(fmt, &hpp, hists, 0);
+                        fmt->header(fmt, &hpp, hists, 0, NULL);
                         strcat(buf, ltrim(rtrim(hpp.buf)));
                 }
         }
diff --git a/tools/perf/ui/hist.c b/tools/perf/ui/hist.c
index 30457c65980c..b47fafc8ee2a 100644
--- a/tools/perf/ui/hist.c
+++ b/tools/perf/ui/hist.c
@@ -230,7 +230,8 @@ static int hpp__width_fn(struct perf_hpp_fmt *fmt,
 }
 
 static int hpp__header_fn(struct perf_hpp_fmt *fmt, struct perf_hpp *hpp,
-                          struct hists *hists, int line __maybe_unused)
+                          struct hists *hists, int line __maybe_unused,
+                          int *span __maybe_unused)
 {
         int len = hpp__width_fn(fmt, hpp, hists);
         return scnprintf(hpp->buf, hpp->size, "%*s", len, fmt->name);
diff --git a/tools/perf/ui/stdio/hist.c b/tools/perf/ui/stdio/hist.c
index 9b807cbb56b1..9b65f4a6b35a 100644
--- a/tools/perf/ui/stdio/hist.c
+++ b/tools/perf/ui/stdio/hist.c
@@ -549,7 +549,7 @@ static int print_hierarchy_header(struct hists *hists, struct perf_hpp *hpp,
                                     struct perf_hpp_list_node, list);
 
         perf_hpp_list__for_each_format(&fmt_node->hpp, fmt) {
-                fmt->header(fmt, hpp, hists, 0);
+                fmt->header(fmt, hpp, hists, 0, NULL);
                 fprintf(fp, "%s%s", hpp->buf, sep ?: "  ");
         }
 
@@ -569,7 +569,7 @@ static int print_hierarchy_header(struct hists *hists, struct perf_hpp *hpp,
                                 header_width += fprintf(fp, "+");
                         first_col = false;
 
-                        fmt->header(fmt, hpp, hists, 0);
+                        fmt->header(fmt, hpp, hists, 0, NULL);
 
                         header_width += fprintf(fp, "%s", trim(hpp->buf));
                 }
@@ -645,18 +645,21 @@ static void fprintf_line(struct hists *hists, struct perf_hpp *hpp,
         struct perf_hpp_fmt *fmt;
         const char *sep = symbol_conf.field_sep;
         bool first = true;
+        int span = 0;
 
         hists__for_each_format(hists, fmt) {
                 if (perf_hpp__should_skip(fmt, hists))
                         continue;
 
-                if (!first)
+                if (!first && !span)
                         fprintf(fp, "%s", sep ?: "  ");
                 else
                         first = false;
 
-                fmt->header(fmt, hpp, hists, line);
-                fprintf(fp, "%s", hpp->buf);
+                fmt->header(fmt, hpp, hists, line, &span);
+
+                if (!span)
+                        fprintf(fp, "%s", hpp->buf);
         }
 }
 
diff --git a/tools/perf/util/hist.h b/tools/perf/util/hist.h
index 71a44c1c44de..a002c93fe422 100644
--- a/tools/perf/util/hist.h
+++ b/tools/perf/util/hist.h
@@ -230,7 +230,7 @@ struct perf_hpp {
 struct perf_hpp_fmt {
         const char *name;
         int (*header)(struct perf_hpp_fmt *fmt, struct perf_hpp *hpp,
-                      struct hists *hists, int line);
+                      struct hists *hists, int line, int *span);
         int (*width)(struct perf_hpp_fmt *fmt, struct perf_hpp *hpp,
                      struct hists *hists);
         int (*color)(struct perf_hpp_fmt *fmt, struct perf_hpp *hpp,
diff --git a/tools/perf/util/sort.c b/tools/perf/util/sort.c
index a556de751018..5ae3d32a21d6 100644
--- a/tools/perf/util/sort.c
+++ b/tools/perf/util/sort.c
@@ -1492,7 +1492,8 @@ void perf_hpp__reset_sort_width(struct perf_hpp_fmt *fmt, struct hists *hists)
 }
 
 static int __sort__hpp_header(struct perf_hpp_fmt *fmt, struct perf_hpp *hpp,
-                              struct hists *hists, int line __maybe_unused)
+                              struct hists *hists, int line __maybe_unused,
+                              int *span __maybe_unused)
 {
         struct hpp_sort_entry *hse;
         size_t len = fmt->user_len;
@@ -1798,7 +1799,8 @@ static void update_dynamic_len(struct hpp_dynamic_entry *hde,
 
 static int __sort__hde_header(struct perf_hpp_fmt *fmt, struct perf_hpp *hpp,
                               struct hists *hists __maybe_unused,
-                              int line __maybe_unused)
+                              int line __maybe_unused,
+                              int *span __maybe_unused)
 {
         struct hpp_dynamic_entry *hde;
         size_t len = fmt->user_len;