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bpo-45953: Statically initialize all the non-object PyInterpreterState fields we can. (gh-30589)

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https://bugs.python.org/issue45953
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Eric Snow 2022-01-13 17:17:28 -07:00 • committed by GitHub
parent 324908ba93
commit 322f962f3e
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5 changed files with 39 additions and 25 deletions
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24
Modules/gcmodule.c
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@ -139,24 +139,20 @@ get_gc_state(void)
void
_PyGC_InitState(GCState *gcstate)
{
gcstate->enabled = 1; /* automatic collection enabled? */
#define INIT_HEAD(GEN) \
do { \
GEN.head._gc_next = (uintptr_t)&GEN.head; \
GEN.head._gc_prev = (uintptr_t)&GEN.head; \
} while (0)
#define _GEN_HEAD(n) GEN_HEAD(gcstate, n)
struct gc_generation generations[NUM_GENERATIONS] = {
/* PyGC_Head, threshold, count */
{{(uintptr_t)_GEN_HEAD(0), (uintptr_t)_GEN_HEAD(0)}, 700, 0},
{{(uintptr_t)_GEN_HEAD(1), (uintptr_t)_GEN_HEAD(1)}, 10, 0},
{{(uintptr_t)_GEN_HEAD(2), (uintptr_t)_GEN_HEAD(2)}, 10, 0},
};
for (int i = 0; i < NUM_GENERATIONS; i++) {
gcstate->generations[i] = generations[i];
assert(gcstate->generations[i].count == 0);
INIT_HEAD(gcstate->generations[i]);
};
gcstate->generation0 = GEN_HEAD(gcstate, 0);
struct gc_generation permanent_generation = {
{(uintptr_t)&gcstate->permanent_generation.head,
(uintptr_t)&gcstate->permanent_generation.head}, 0, 0
};
gcstate->permanent_generation = permanent_generation;
INIT_HEAD(gcstate->permanent_generation);
#undef INIT_HEAD
}