Commit Graph

5 Commits

Author SHA1 Message Date
Omar Sandoval
b87070f98c libdrgn: fix vector_shrink_to_fit() with size 0
realloc(ptr, 0) is equivalent to free(ptr). It may return NULL, in which
case vector_do_shrink_to_fit() won't update the vector's data and
capacity. A subsequent append will then try to reuse the previous
allocation, causing a use-after-free. free() empty vectors explicitly
instead.

Fixes: 8d52536271 ("libdrgn: add common vector implementation")
Signed-off-by: Omar Sandoval <osandov@osandov.com>
2021-01-06 17:47:39 -08:00
Omar Sandoval
8b264f8823 Update copyright headers to Facebook and add missing headers
drgn was originally my side project, but for awhile now it's also been
my work project. Update the copyright headers to reflect this, and add a
copyright header to various files that were missing it.
2020-05-15 15:13:02 -07:00
Omar Sandoval
0cb77b303c libdrgn: work around Clang __muloti4 again
See 2dd14ad522 ("libdrgn: work around "undefined reference to
'__muloti4'" when using Clang").
2019-07-29 17:03:45 -07:00
Omar Sandoval
3e95e88028 libdrgn: vector: protect against overflow when doubling capacity
It seems extremely unlikely that we'd actually overflow before we run
out of memory, but let's just be safe.
2019-07-19 09:27:20 -07:00
Omar Sandoval
8d52536271 libdrgn: add common vector implementation
drgn has enough open-coded dynamic arrays at this point to warrant a
common implementation. Add one inspired by hash_table.h. The API is
pretty minimal. I'll add more to it as the need arises.
2019-07-15 12:27:15 -07:00