Merge branch 'jk/tighten-alloc'

Update various codepaths to avoid manually-counted malloc().

* jk/tighten-alloc: (22 commits)
  ewah: convert to REALLOC_ARRAY, etc
  convert ewah/bitmap code to use xmalloc
  diff_populate_gitlink: use a strbuf
  transport_anonymize_url: use xstrfmt
  git-compat-util: drop mempcpy compat code
  sequencer: simplify memory allocation of get_message
  test-path-utils: fix normalize_path_copy output buffer size
  fetch-pack: simplify add_sought_entry
  fast-import: simplify allocation in start_packfile
  write_untracked_extension: use FLEX_ALLOC helper
  prepare_{git,shell}_cmd: use argv_array
  use st_add and st_mult for allocation size computation
  convert trivial cases to FLEX_ARRAY macros
  use xmallocz to avoid size arithmetic
  convert trivial cases to ALLOC_ARRAY
  convert manual allocations to argv_array
  argv-array: add detach function
  add helpers for allocating flex-array structs
  harden REALLOC_ARRAY and xcalloc against size_t overflow
  tree-diff: catch integer overflow in combine_diff_path allocation
  ...

1 files changed, 5 insertions, 8 deletions

diff --git a/remote.c b/remote.c
index f00168110..fc0269858 100644
--- a/remote.c
+++ b/remote.c
@@ -917,7 +917,7 @@ static struct ref *alloc_ref_with_prefix(const char *prefix, size_t prefixlen,
 		const char *name)
 {
 	size_t len = strlen(name);
-	struct ref *ref = xcalloc(1, sizeof(struct ref) + prefixlen + len + 1);
+	struct ref *ref = xcalloc(1, st_add4(sizeof(*ref), prefixlen, len, 1));
 	memcpy(ref->name, prefix, prefixlen);
 	memcpy(ref->name + prefixlen, name, len);
 	return ref;
@@ -934,9 +934,9 @@ struct ref *copy_ref(const struct ref *ref)
 	size_t len;
 	if (!ref)
 		return NULL;
-	len = strlen(ref->name);
-	cpy = xmalloc(sizeof(struct ref) + len + 1);
-	memcpy(cpy, ref, sizeof(struct ref) + len + 1);
+	len = st_add3(sizeof(struct ref), strlen(ref->name), 1);
+	cpy = xmalloc(len);
+	memcpy(cpy, ref, len);
 	cpy->next = NULL;
 	cpy->symref = xstrdup_or_null(ref->symref);
 	cpy->remote_status = xstrdup_or_null(ref->remote_status);
@@ -2122,16 +2122,13 @@ static int one_local_ref(const char *refname, const struct object_id *oid,
 {
 	struct ref ***local_tail = cb_data;
 	struct ref *ref;
-	int len;
 
 	/* we already know it starts with refs/ to get here */
 	if (check_refname_format(refname + 5, 0))
 		return 0;
 
-	len = strlen(refname) + 1;
-	ref = xcalloc(1, sizeof(*ref) + len);
+	ref = alloc_ref(refname);
 	oidcpy(&ref->new_oid, oid);
-	memcpy(ref->name, refname, len);
 	**local_tail = ref;
 	*local_tail = &ref->next;
 	return 0;