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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: Stephane Eranian <eranian@google.com>
Tested-by: Stephane 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: Arnaldo Carvalho de Melo <acme@redhat.com>
This commit is contained in:
Arnaldo Carvalho de Melo 2013-09-05 15:39:12 -03:00
parent 98be6966ed
commit 99cf666c5c
1 changed files with 17 additions and 6 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

23
tools/perf/ui/stdio/hist.c
View File

@ -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 @@ print_entries:
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 @@ print_entries:
fprintf(fp, "%.10s end\n", graph_dotted_line);
}
}
free(line);
out:
free(rem_sq_bracket);