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Emap: Add emap_assert_not_mapped.

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The counterpart to emap_assert_mapped, it lets callers check that some edata is
not already in the emap.
This commit is contained in:
David Goldblatt 2020-09-28 15:52:36 -07:00 committed by David Goldblatt
parent 2a6ba121b5
commit 1ed7ec369f
2 changed files with 22 additions and 0 deletions
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9
include/jemalloc/internal/emap.h
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@ -127,6 +127,15 @@ emap_assert_mapped(tsdn_t *tsdn, emap_t *emap, edata_t *edata) {
} }
} }
/* Assert that the given edata isn't in the map. */
void emap_do_assert_not_mapped(tsdn_t *tsdn, emap_t *emap, edata_t *edata);
static inline void
emap_assert_not_mapped(tsdn_t *tsdn, emap_t *emap, edata_t *edata) {
if (config_debug) {
emap_do_assert_not_mapped(tsdn, emap, edata);
}
}
JEMALLOC_ALWAYS_INLINE edata_t * JEMALLOC_ALWAYS_INLINE edata_t *
emap_edata_lookup(tsdn_t *tsdn, emap_t *emap, const void *ptr) { emap_edata_lookup(tsdn_t *tsdn, emap_t *emap, const void *ptr) {
rtree_ctx_t rtree_ctx_fallback; rtree_ctx_t rtree_ctx_fallback;

13
src/emap.c
View File

@ -323,3 +323,16 @@ emap_do_assert_mapped(tsdn_t *tsdn, emap_t *emap, edata_t *edata) {
assert(rtree_read(tsdn, &emap->rtree, rtree_ctx, assert(rtree_read(tsdn, &emap->rtree, rtree_ctx,
(uintptr_t)edata_base_get(edata)).edata == edata); (uintptr_t)edata_base_get(edata)).edata == edata);
} }
void
emap_do_assert_not_mapped(tsdn_t *tsdn, emap_t *emap, edata_t *edata) {
emap_full_alloc_ctx_t context1 = {0};
emap_full_alloc_ctx_try_lookup(tsdn, emap, edata_base_get(edata),
&context1);
assert(context1.edata == NULL);
emap_full_alloc_ctx_t context2 = {0};
emap_full_alloc_ctx_try_lookup(tsdn, emap, edata_last_get(edata),
&context2);
assert(context2.edata == NULL);
}