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unix/coverage: Add extra GC coverage test for ATB gap byte.

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The assertion that is added here (to gc.c) fails when running this new test
if ALLOC_TABLE_GAP_BYTE is set to 0.

Signed-off-by: Jeff Epler <jepler@gmail.com>
Signed-off-by: Damien George <damien@micropython.org>
This commit is contained in:
Jeff Epler
2021-09-15 10:54:48 -05:00
committed by Damien George
parent 9f434dd8de
commit d75ff42297
3 changed files with 42 additions and 0 deletions
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3
py/gc.c
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@@ -297,6 +297,9 @@ STATIC void gc_mark_subtree(size_t block)
n_blocks += 1;
} while (ATB_GET_KIND(area, block + n_blocks) == AT_TAIL);
// check that the consecutive blocks didn't overflow past the end of the area
assert(area->gc_pool_start + (block + n_blocks) * BYTES_PER_BLOCK <= area->gc_pool_end);
// check this block's children
void **ptrs = (void **)PTR_FROM_BLOCK(area, block);
for (size_t i = n_blocks * BYTES_PER_BLOCK / sizeof(void *); i > 0; i--, ptrs++) {