On 2/12/21 11:07 PM, Laine Stump wrote:
142 more down, 3084 to go :-)
This goes through all the standard methods of eliminating VIR_FREE -
first converting as many pointers as possible to g_autofree, then
converting a few more *Free* functions (that were more questionable
than previous Frees) to use g_free, then some trivial refactoring. And
finally at the end a few stragglers that really do need the pointers
cleared were changed to g_clear_pointer(x, g_free).
A couple of issues:
1) There are two definitions of a macro called ESX_VI__TEMPLATE__FREE
that generate functions with names in the form of
"esxVI_.*_Free". These generated functions were doing
"VIR_FREE(*ptrptr)" at the end; because of the "*", the caller's
pointer would be cleared out (not just the local copy). There are
something over 400 calls to these functions, and all but 10 or so that
I audited will never reference the pointer after return from
esxVI_Blah_Free(). But there are several that do. Since I'm unfamiliar
with this code and don't want to risk breaking it, I opted to just use
g_clear_pointer(ptrptr, g_free), thus preserving current behavior
exactly.
2) There are still 7 instances of VIR_FREE in the esx directory. All 7
of them are in loops that are clearing out an array of names prior to
returning failure, and from a quick glance it looks like there are at
least a few places where it is important to clear the array entries. But rather than brute force convert to using g_clear_pointer in the loop, I figured someone may come up with an elegant translation to use GArray or GPtrArray instead, so I'm leaving them for now.
Laine Stump (9):
esx: use g_autofree for char* where it is trivially possible
esx: use g_autofree when made possible by reducing scope
esx: fix memory leak by switching to g_autofree
esx: switch VIR_FREE->g_free in esx*Free*()
esx: use g_steal_pointer+g_autofree on return value
esx: reorder code to avoid need to VIR_FREE mimeType
esx: switch VIR_FREE->g_free when the pointer will immediately go out
of scope
esx: eliminate unnecessary cleanup: labels and result variables
esx: replace some VIR_FREE with g_clear_pointer(x, g_free)
src/esx/esx_driver.c | 189 +++++++++-------------------
src/esx/esx_network_driver.c | 4 +-
src/esx/esx_storage_backend_iscsi.c | 16 +--
src/esx/esx_storage_backend_vmfs.c | 150 +++++++---------------
src/esx/esx_stream.c | 11 +-
src/esx/esx_util.c | 41 +++---
src/esx/esx_vi.c | 111 ++++++----------
src/esx/esx_vi_methods.c | 3 +-
src/esx/esx_vi_types.c | 18 +--
9 files changed, 179 insertions(+), 364 deletions(-)
Reviewed-by: Michal Privoznik <mprivozn@xxxxxxxxxx>
Michal
