On Tue, Jan 14, 2020 at 3:13 AM Brendan Higgins brendanhiggins@google.com wrote:
On Fri, Jan 10, 2020 at 5:43 AM Arnd Bergmann arnd@arndb.de wrote:
In combination with the structleak gcc plugin, kunit can lead to excessive stack usage when each assertion adds another structure to the stack from of the calling function:
base/test/property-entry-test.c:99:1: error: the frame size of 3032 bytes is larger than 2048 bytes [-Werror=frame-larger-than=]
As most assertions are binary, change those over to a direct function call that does not have this problem. This can probably be improved further, I just went for a straightforward conversion, but a function call with 12 fixed arguments plus varargs it not great either.
Yeah, I am not exactly excited by maintaining such a set of functions.
Ok.
I don't think anyone wants to go with the heap allocation route.
Along the lines of the union/single copy idea[1]. What if we just put a union of all the assertion types in the kunit struct? One is already allocated for every test case and we only need one assertion object for each test case at a time, so I imagine that sould work.
Ah right, that should work fine, and may also lead to better object code if the compiler can avoid repeated assignments of the same values, e.g. ".file = __FILE__".
Arnd