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Commit 99cf666c authored by Arnaldo Carvalho de Melo's avatar Arnaldo Carvalho de Melo
Browse files

perf hists: Fix formatting of long symbol names 



We had a hardcoded buffer for formatting histogram entries, truncating
long symbol names (C++ anyone?).

Fix it by using hists__sort_list_width() before formatting the first
histogram entry to calculate the max lenght needed by traversing the
overheads and columns lists (sort order).

Reported-by: default avatarStephane Eranian <eranian@google.com>
Tested-by: default avatarStephane Eranian <eranian@google.com>
Cc: Adrian Hunter <adrian.hunter@intel.com>
Cc: David Ahern <dsahern@gmail.com>
Cc: Frederic Weisbecker <fweisbec@gmail.com>
Cc: Jiri Olsa <jolsa@redhat.com>
Cc: Mike Galbraith <efault@gmx.de>
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-vdfkkyfdp8rboh7j9344o3ss@git.kernel.org


Signed-off-by: default avatarArnaldo Carvalho de Melo <acme@redhat.com>
parent 98be6966

tools/perf/ui/stdio/hist.c

+17 −6
Original line number Diff line number Diff line
@@ -350,9 +350,9 @@ static int hist_entry__period_snprintf(struct perf_hpp *hpp, 
}



static int hist_entry__fprintf(struct hist_entry *he, size_t size,

			       struct hists *hists, FILE *fp)

			       struct hists *hists,

			       char *bf, size_t bfsz, FILE *fp)

{

	char bf[512];

	int ret;

	struct perf_hpp hpp = {

		.buf		= bf,
@@ -360,8 +360,8 @@ static int hist_entry__fprintf(struct hist_entry *he, size_t size, 
	};

	bool color = !symbol_conf.field_sep;



	if (size == 0 || size > sizeof(bf))

		size = hpp.size = sizeof(bf);

	if (size == 0 || size > bfsz)

		size = hpp.size = bfsz;



	ret = hist_entry__period_snprintf(&hpp, he, color);

	hist_entry__sort_snprintf(he, bf + ret, size - ret, hists);
@@ -392,6 +392,8 @@ size_t hists__fprintf(struct hists *hists, bool show_header, int max_rows, 
		.ptr	= hists_to_evsel(hists),

	};

	bool first = true;

	size_t linesz;

	char *line = NULL;



	init_rem_hits();
@@ -479,6 +481,13 @@ size_t hists__fprintf(struct hists *hists, bool show_header, int max_rows, 
		goto out;



print_entries:

	linesz = hists__sort_list_width(hists) + 3 + 1;

	line = malloc(linesz);

	if (line == NULL) {

		ret = -1;

		goto out;

	}



	for (nd = rb_first(&hists->entries); nd; nd = rb_next(nd)) {

		struct hist_entry *h = rb_entry(nd, struct hist_entry, rb_node);

		float percent = h->stat.period * 100.0 /
@@ -490,10 +499,10 @@ size_t hists__fprintf(struct hists *hists, bool show_header, int max_rows, 
		if (percent < min_pcnt)

			continue;



		ret += hist_entry__fprintf(h, max_cols, hists, fp);

		ret += hist_entry__fprintf(h, max_cols, hists, line, linesz, fp);



		if (max_rows && ++nr_rows >= max_rows)

			goto out;

			break;



		if (h->ms.map == NULL && verbose > 1) {

			__map_groups__fprintf_maps(&h->thread->mg,
@@ -501,6 +510,8 @@ size_t hists__fprintf(struct hists *hists, bool show_header, int max_rows, 
			fprintf(fp, "%.10s end\n", graph_dotted_line);

		}

	}



	free(line);

out:

	free(rem_sq_bracket);