Have the string lists contain the size inside them.
The way this is done is by allocating one pointer than the user needs:
/* just pseudo code of the idea, no error checking */
if (!list) {
list = malloc(sizeof(*list) * 3);
list[0] = (char *)1;
list[1] = strdup(users_string);
list[2] = NULL;
return &list[1];
}
list--;
size = *(unsigned long *)list;
tmp = realloc(list, sizeof(*list) * (size + 3));
list = tmp;
list[0] = (char *)(size + 1);
list++;
list[size++] = strdup(users_string);
list[size] = NULL;
return list;
Implementing this has fixed a few bugs and memory leaks.
Steven Rostedt (VMware) (2):
libtracefs: Move tracefs_list_free() to tracefs-utils.c
libtracefs: Restructure how string lists work
include/tracefs-local.h | 1 +
include/tracefs.h | 4 +-
src/tracefs-events.c | 61 ++++++++++--------------------
src/tracefs-instance.c | 9 +----
src/tracefs-kprobes.c | 17 ++-------
src/tracefs-tools.c | 6 +--
src/tracefs-utils.c | 83 +++++++++++++++++++++++++++++++++++++++++
7 files changed, 112 insertions(+), 69 deletions(-)
--
2.30.2
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