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-rw-r--r--tools/perf/util/help-unknown-cmd.c30
1 files changed, 22 insertions, 8 deletions
diff --git a/tools/perf/util/help-unknown-cmd.c b/tools/perf/util/help-unknown-cmd.c
index 43a98a4dc1e1..d62ccaeeadd6 100644
--- a/tools/perf/util/help-unknown-cmd.c
+++ b/tools/perf/util/help-unknown-cmd.c
@@ -27,16 +27,27 @@ static int levenshtein_compare(const void *p1, const void *p2)
return l1 != l2 ? l1 - l2 : strcmp(s1, s2);
}
-static void add_cmd_list(struct cmdnames *cmds, struct cmdnames *old)
+static int add_cmd_list(struct cmdnames *cmds, struct cmdnames *old)
{
- unsigned int i;
-
- ALLOC_GROW(cmds->names, cmds->cnt + old->cnt, cmds->alloc);
-
+ unsigned int i, nr = cmds->cnt + old->cnt;
+ void *tmp;
+
+ if (nr > cmds->alloc) {
+ /* Choose bigger one to alloc */
+ if (alloc_nr(cmds->alloc) < nr)
+ cmds->alloc = nr;
+ else
+ cmds->alloc = alloc_nr(cmds->alloc);
+ tmp = realloc(cmds->names, cmds->alloc * sizeof(*cmds->names));
+ if (!tmp)
+ return -1;
+ cmds->names = tmp;
+ }
for (i = 0; i < old->cnt; i++)
cmds->names[cmds->cnt++] = old->names[i];
zfree(&old->names);
old->cnt = 0;
+ return 0;
}
const char *help_unknown_cmd(const char *cmd)
@@ -52,8 +63,11 @@ const char *help_unknown_cmd(const char *cmd)
load_command_list("perf-", &main_cmds, &other_cmds);
- add_cmd_list(&main_cmds, &aliases);
- add_cmd_list(&main_cmds, &other_cmds);
+ if (add_cmd_list(&main_cmds, &aliases) < 0 ||
+ add_cmd_list(&main_cmds, &other_cmds) < 0) {
+ fprintf(stderr, "ERROR: Failed to allocate command list for unknown command.\n");
+ goto end;
+ }
qsort(main_cmds.names, main_cmds.cnt,
sizeof(main_cmds.names), cmdname_compare);
uniq(&main_cmds);
@@ -99,6 +113,6 @@ const char *help_unknown_cmd(const char *cmd)
for (i = 0; i < n; i++)
fprintf(stderr, "\t%s\n", main_cmds.names[i]->name);
}
-
+end:
exit(1);
}