Release item->value.
Initialize item->value->s dynamically and then release its resources.
Release some local variables.
Final goal of this patch is to reduce number of memory leaks.
Signed-off-by: Olga Telezhnaia <olyatelezhnaya@xxxxxxxxx>
---
ref-filter.c | 96 +++++++++++++++++++++++++++++-----------------------
1 file changed, 54 insertions(+), 42 deletions(-)
diff --git a/ref-filter.c b/ref-filter.c
index 70f1d13ab3beb..ca52ee4608c2a 100644
--- a/ref-filter.c
+++ b/ref-filter.c
@@ -875,7 +875,7 @@ static void grab_common_values(struct atom_value *val, int deref, struct expand_
if (deref)
name++;
if (!strcmp(name, "objecttype"))
- v->s = type_name(oi->type);
+ v->s = xstrdup(type_name(oi->type));
else if (!strcmp(name, "objectsize")) {
v->value = oi->size;
v->s = xstrfmt("%lu", oi->size);
@@ -899,9 +899,9 @@ static void grab_tag_values(struct atom_value *val, int deref, struct object *ob
if (deref)
name++;
if (!strcmp(name, "tag"))
- v->s = tag->tag;
+ v->s = xstrdup(tag->tag);
else if (!strcmp(name, "type") && tag->tagged)
- v->s = type_name(tag->tagged->type);
+ v->s = xstrdup(type_name(tag->tagged->type));
else if (!strcmp(name, "object") && tag->tagged)
v->s = xstrdup(oid_to_hex(&tag->tagged->oid));
}
@@ -1032,7 +1032,7 @@ static void grab_date(const char *buf, struct atom_value *v, const char *atomnam
v->value = timestamp;
return;
bad:
- v->s = "";
+ v->s = xstrdup("");
v->value = 0;
}
@@ -1227,7 +1227,7 @@ static void fill_missing_values(struct atom_value *val)
for (i = 0; i < used_atom_cnt; i++) {
struct atom_value *v = &val[i];
if (v->s == NULL)
- v->s = "";
+ v->s = xstrdup("");
}
}
@@ -1273,7 +1273,8 @@ static inline char *copy_advance(char *dst, const char *src)
static const char *lstrip_ref_components(const char *refname, int len)
{
long remaining = len;
- const char *start = refname;
+ const char *start = xstrdup(refname);
+ const char *to_free = start;
if (len < 0) {
int i;
@@ -1294,20 +1295,24 @@ static const char *lstrip_ref_components(const char *refname, int len)
while (remaining > 0) {
switch (*start++) {
case '\0':
- return "";
+ free((char *)to_free);
+ return xstrdup("");
case '/':
remaining--;
break;
}
}
+ start = xstrdup(start);
+ free((char *)to_free);
return start;
}
static const char *rstrip_ref_components(const char *refname, int len)
{
long remaining = len;
- char *start = xstrdup(refname);
+ const char *start = xstrdup(refname);
+ const char *to_free = start;
if (len < 0) {
int i;
@@ -1327,9 +1332,10 @@ static const char *rstrip_ref_components(const char *refname, int len)
while (remaining-- > 0) {
char *p = strrchr(start, '/');
- if (p == NULL)
- return "";
- else
+ if (p == NULL) {
+ free((char *)to_free);
+ return xstrdup("");
+ } else
p[0] = '\0';
}
return start;
@@ -1344,7 +1350,7 @@ static const char *show_ref(struct refname_atom *atom, const char *refname)
else if (atom->option == R_RSTRIP)
return rstrip_ref_components(refname, atom->rstrip);
else
- return refname;
+ return xstrdup(refname);
}
static void fill_remote_ref_details(struct used_atom *atom, const char *refname,
@@ -1358,7 +1364,7 @@ static void fill_remote_ref_details(struct used_atom *atom, const char *refname,
NULL, AHEAD_BEHIND_FULL) < 0) {
*s = xstrdup(msgs.gone);
} else if (!num_ours && !num_theirs)
- *s = "";
+ *s = xstrdup("");
else if (!num_ours)
*s = xstrfmt(msgs.behind, num_theirs);
else if (!num_theirs)
@@ -1373,36 +1379,31 @@ static void fill_remote_ref_details(struct used_atom *atom, const char *refname,
}
} else if (atom->u.remote_ref.option == RR_TRACKSHORT) {
if (stat_tracking_info(branch, &num_ours, &num_theirs,
- NULL, AHEAD_BEHIND_FULL) < 0)
+ NULL, AHEAD_BEHIND_FULL) < 0) {
+ *s = xstrdup("");
return;
-
+ }
if (!num_ours && !num_theirs)
- *s = "=";
+ *s = xstrdup("=");
else if (!num_ours)
- *s = "<";
+ *s = xstrdup("<");
else if (!num_theirs)
- *s = ">";
+ *s = xstrdup(">");
else
- *s = "<>";
+ *s = xstrdup("<>");
} else if (atom->u.remote_ref.option == RR_REMOTE_NAME) {
int explicit;
const char *remote = atom->u.remote_ref.push ?
pushremote_for_branch(branch, &explicit) :
remote_for_branch(branch, &explicit);
- if (explicit)
- *s = xstrdup(remote);
- else
- *s = "";
+ *s = xstrdup(explicit ? remote : "");
} else if (atom->u.remote_ref.option == RR_REMOTE_REF) {
int explicit;
const char *merge;
merge = remote_ref_for_branch(branch, atom->u.remote_ref.push,
&explicit);
- if (explicit)
- *s = xstrdup(merge);
- else
- *s = "";
+ *s = xstrdup(explicit ? merge : "");
} else
BUG("unhandled RR_* enum");
}
@@ -1451,7 +1452,7 @@ char *get_head_description(void)
static const char *get_symref(struct used_atom *atom, struct ref_array_item *ref)
{
if (!ref->symref)
- return "";
+ return xstrdup("");
else
return show_ref(&atom->u.refname, ref->symref);
}
@@ -1510,7 +1511,7 @@ static int populate_value(struct ref_array_item *ref, struct strbuf *err)
ref->symref = resolve_refdup(ref->refname, RESOLVE_REF_READING,
NULL, NULL);
if (!ref->symref)
- ref->symref = "";
+ ref->symref = xstrdup("");
}
/* Fill in specials first */
@@ -1536,20 +1537,23 @@ static int populate_value(struct ref_array_item *ref, struct strbuf *err)
refname = get_symref(atom, ref);
else if (starts_with(name, "upstream")) {
const char *branch_name;
- v->s = "";
/* only local branches may have an upstream */
if (!skip_prefix(ref->refname, "refs/heads/",
- &branch_name))
+ &branch_name)) {
+ v->s = xstrdup("");
continue;
+ }
branch = branch_get(branch_name);
refname = branch_get_upstream(branch, NULL);
if (refname)
fill_remote_ref_details(atom, refname, branch, &v->s);
+ else
+ v->s = xstrdup("");
continue;
} else if (atom->u.remote_ref.push) {
const char *branch_name;
- v->s = "";
+ v->s = xstrdup("");
if (!skip_prefix(ref->refname, "refs/heads/",
&branch_name))
continue;
@@ -1562,10 +1566,12 @@ static int populate_value(struct ref_array_item *ref, struct strbuf *err)
if (!refname)
continue;
}
+ /* We will definitely re-init v->s on the next line. */
+ free((char *)v->s);
fill_remote_ref_details(atom, refname, branch, &v->s);
continue;
} else if (starts_with(name, "color:")) {
- v->s = atom->u.color;
+ v->s = xstrdup(atom->u.color);
continue;
} else if (!strcmp(name, "flag")) {
char buf[256], *cp = buf;
@@ -1574,7 +1580,7 @@ static int populate_value(struct ref_array_item *ref, struct strbuf *err)
if (ref->flag & REF_ISPACKED)
cp = copy_advance(cp, ",packed");
if (cp == buf)
- v->s = "";
+ v->s = xstrdup("");
else {
*cp = '\0';
v->s = xstrdup(buf + 1);
@@ -1584,40 +1590,42 @@ static int populate_value(struct ref_array_item *ref, struct strbuf *err)
continue;
} else if (!strcmp(name, "HEAD")) {
if (atom->u.head && !strcmp(ref->refname, atom->u.head))
- v->s = "*";
+ v->s = xstrdup("*");
else
- v->s = " ";
+ v->s = xstrdup(" ");
continue;
} else if (starts_with(name, "align")) {
v->handler = align_atom_handler;
- v->s = "";
+ v->s = xstrdup("");
continue;
} else if (!strcmp(name, "end")) {
v->handler = end_atom_handler;
- v->s = "";
+ v->s = xstrdup("");
continue;
} else if (starts_with(name, "if")) {
const char *s;
- v->s = "";
if (skip_prefix(name, "if:", &s))
v->s = xstrdup(s);
+ else
+ v->s = xstrdup("");
v->handler = if_atom_handler;
continue;
} else if (!strcmp(name, "then")) {
v->handler = then_atom_handler;
- v->s = "";
+ v->s = xstrdup("");
continue;
} else if (!strcmp(name, "else")) {
v->handler = else_atom_handler;
- v->s = "";
+ v->s = xstrdup("");
continue;
} else
continue;
if (!deref)
- v->s = refname;
+ v->s = xstrdup(refname);
else
v->s = xstrfmt("%s^{}", refname);
+ free((char *)refname);
}
for (i = 0; i < used_atom_cnt; i++) {
@@ -1988,6 +1996,10 @@ static int ref_filter_handler(const char *refname, const struct object_id *oid,
static void free_array_item(struct ref_array_item *item)
{
free((char *)item->symref);
+ if (item->value) {
+ free((char *)item->value->s);
+ free(item->value);
+ }
free(item);
}
--
https://github.com/git/git/pull/538
