perf annotate browser: More clearly separate columns

The first column (columns in the near future) are for the per line event
overhead(s), that only appear when they are not zero.

To clearly separate it, add back a solid vertical line, with just one
colour, not influenced by the per line overheads.

Then have the addr/offset column, then optionally the dynamic
(static in the future) jump->target arrows, if 'j' enables it.

Then the instructions.

Requested-by: Peter Zijlstra <peterz@infradead.org>
Cc: David Ahern <dsahern@gmail.com>
Cc: Frederic Weisbecker <fweisbec@gmail.com>
Cc: Mike Galbraith <efault@gmx.de>
Cc: Namhyung Kim <namhyung@gmail.com>
Cc: Paul Mackerras <paulus@samba.org>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Stephane Eranian <eranian@google.com>
Link: http://lkml.kernel.org/n/tip-r415t4sps0oyr9y8kd9j7clz@git.kernel.org
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
diff --git a/tools/perf/ui/browsers/annotate.c b/tools/perf/ui/browsers/annotate.c
index 44fb6a4..74104a4 100644
--- a/tools/perf/ui/browsers/annotate.c
+++ b/tools/perf/ui/browsers/annotate.c
@@ -32,7 +32,9 @@
 	bool		    use_offset;
 	bool		    jump_arrows;
 	bool		    searching_backwards;
-	u8		    offset_width;
+	u8		    addr_width;
+	u8		    min_addr_width;
+	u8		    max_addr_width;
 	char		    search_bf[128];
 };
 
@@ -62,7 +64,8 @@
 	bool change_color = (!ab->hide_src_code &&
 			     (!current_entry || (self->use_navkeypressed &&
 					         !self->navkeypressed)));
-	int width = self->width;
+	int width = self->width, printed;
+	char bf[256];
 
 	if (dl->offset != -1 && bdl->percent != 0.0) {
 		ui_browser__set_percent_color(self, bdl->percent, current_entry);
@@ -83,25 +86,27 @@
 
 	if (!*dl->line)
 		slsmg_write_nstring(" ", width - 7);
-	else if (dl->offset == -1)
-		slsmg_write_nstring(dl->line, width - 7);
-	else {
-		char bf[256];
+	else if (dl->offset == -1) {
+		printed = scnprintf(bf, sizeof(bf), "%*s  ",
+				    ab->addr_width, " ");
+		slsmg_write_nstring(bf, printed);
+		slsmg_write_nstring(dl->line, width - printed - 6);
+	} else {
 		u64 addr = dl->offset;
-		int printed, color = -1;
+		int color = -1;
 
 		if (!ab->use_offset)
 			addr += ab->start;
 
 		if (!ab->use_offset) {
-			printed = scnprintf(bf, sizeof(bf), "  %" PRIx64 ":", addr);
+			printed = scnprintf(bf, sizeof(bf), "%" PRIx64 ": ", addr);
 		} else {
 			if (bdl->jump_target) {
-				printed = scnprintf(bf, sizeof(bf), "  %*" PRIx64 ":",
-						    ab->offset_width, addr);
+				printed = scnprintf(bf, sizeof(bf), "%*" PRIx64 ": ",
+						    ab->addr_width, addr);
 			} else {
-				printed = scnprintf(bf, sizeof(bf), "  %*s ",
-						    ab->offset_width, " ");
+				printed = scnprintf(bf, sizeof(bf), "%*s  ",
+						    ab->addr_width, " ");
 			}
 		}
 
@@ -137,7 +142,7 @@
 			scnprintf(bf, sizeof(bf), "%-6.6s %s", dl->name, dl->ops.raw);
 		}
 
-		slsmg_write_nstring(bf, width - 9 - printed);
+		slsmg_write_nstring(bf, width - 10 - printed);
 	}
 
 	if (current_entry)
@@ -149,7 +154,7 @@
 	struct annotate_browser *ab = container_of(browser, struct annotate_browser, b);
 	struct disasm_line *cursor = ab->selection, *target;
 	struct browser_disasm_line *btarget, *bcursor;
-	unsigned int from, to, start_width = 2;
+	unsigned int from, to;
 
 	if (!cursor->ins || !ins__is_jump(cursor->ins) ||
 	    !disasm_line__has_offset(cursor))
@@ -171,11 +176,7 @@
 	}
 
 	ui_browser__set_color(browser, HE_COLORSET_CODE);
-
-	if (!bcursor->jump_target)
-		start_width += ab->offset_width + 1;
-
-	__ui_browser__line_arrow(browser, 7, from, to, start_width);
+	__ui_browser__line_arrow(browser, 9 + ab->addr_width, from, to);
 }
 
 static unsigned int annotate_browser__refresh(struct ui_browser *browser)
@@ -186,6 +187,8 @@
 	if (ab->jump_arrows)
 		annotate_browser__draw_current_jump(browser);
 
+	ui_browser__set_color(browser, HE_COLORSET_NORMAL);
+	__ui_browser__vline(browser, 7, 0, browser->height - 1);
 	return ret;
 }
 
@@ -618,6 +621,10 @@
 		case 'O':
 		case 'o':
 			self->use_offset = !self->use_offset;
+			if (self->use_offset)
+				self->addr_width = self->min_addr_width;
+			else
+				self->addr_width = self->max_addr_width;
 			continue;
 		case 'j':
 			self->jump_arrows = !self->jump_arrows;
@@ -784,7 +791,8 @@
 
 	annotate_browser__mark_jump_targets(&browser, size);
 
-	browser.offset_width = hex_width(size);
+	browser.addr_width = browser.min_addr_width = hex_width(size);
+	browser.max_addr_width = hex_width(sym->end);
 	browser.b.nr_entries = browser.nr_entries;
 	browser.b.entries = &notes->src->source,
 	browser.b.width += 18; /* Percentage */