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/browser.c b/tools/perf/ui/browser.c
index b075e09..cde4d0f 100644
--- a/tools/perf/ui/browser.c
+++ b/tools/perf/ui/browser.c
@@ -611,7 +611,7 @@
 
 static void __ui_browser__line_arrow_up(struct ui_browser *browser,
 					unsigned int column,
-					u64 start, u64 end, int start_width)
+					u64 start, u64 end)
 {
 	unsigned int row, end_row;
 
@@ -622,7 +622,7 @@
 		ui_browser__gotorc(browser, row, column);
 		SLsmg_write_char(SLSMG_LLCORN_CHAR);
 		ui_browser__gotorc(browser, row, column + 1);
-		SLsmg_draw_hline(start_width);
+		SLsmg_draw_hline(2);
 
 		if (row-- == 0)
 			goto out;
@@ -651,7 +651,7 @@
 
 static void __ui_browser__line_arrow_down(struct ui_browser *browser,
 					  unsigned int column,
-					  u64 start, u64 end, int start_width)
+					  u64 start, u64 end)
 {
 	unsigned int row, end_row;
 
@@ -662,7 +662,7 @@
 		ui_browser__gotorc(browser, row, column);
 		SLsmg_write_char(SLSMG_ULCORN_CHAR);
 		ui_browser__gotorc(browser, row, column + 1);
-		SLsmg_draw_hline(start_width);
+		SLsmg_draw_hline(2);
 
 		if (row++ == 0)
 			goto out;
@@ -690,12 +690,12 @@
 }
 
 void __ui_browser__line_arrow(struct ui_browser *browser, unsigned int column,
-			      u64 start, u64 end, int start_width)
+			      u64 start, u64 end)
 {
 	if (start > end)
-		__ui_browser__line_arrow_up(browser, column, start, end, start_width);
+		__ui_browser__line_arrow_up(browser, column, start, end);
 	else
-		__ui_browser__line_arrow_down(browser, column, start, end, start_width);
+		__ui_browser__line_arrow_down(browser, column, start, end);
 }
 
 void ui_browser__init(void)
diff --git a/tools/perf/ui/browser.h b/tools/perf/ui/browser.h
index 511e24d..dd96d82 100644
--- a/tools/perf/ui/browser.h
+++ b/tools/perf/ui/browser.h
@@ -39,7 +39,7 @@
 void ui_browser__gotorc(struct ui_browser *self, int y, int x);
 void ui_browser__write_graph(struct ui_browser *browser, int graph);
 void __ui_browser__line_arrow(struct ui_browser *browser, unsigned int column,
-			      u64 start, u64 end, int start_width);
+			      u64 start, u64 end);
 void __ui_browser__show_title(struct ui_browser *browser, const char *title);
 void ui_browser__show_title(struct ui_browser *browser, const char *title);
 int ui_browser__show(struct ui_browser *self, const char *title,
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 */