Function isfree

app/redis-6.2.6/deps/jemalloc/src/jemalloc.c:2230–2284

}

JEMALLOC_ALWAYS_INLINE void
isfree(tsd_t *tsd, void *ptr, size_t usize, tcache_t *tcache, bool slow_path) {
	if (!slow_path) {
		tsd_assert_fast(tsd);
	}
	check_entry_exit_locking(tsd_tsdn(tsd));
	if (tsd_reentrancy_level_get(tsd) != 0) {
		assert(slow_path);
	}

	assert(ptr != NULL);
	assert(malloc_initialized() || IS_INITIALIZER);

	alloc_ctx_t alloc_ctx, *ctx;
	if (!config_cache_oblivious && ((uintptr_t)ptr & PAGE_MASK) != 0) {
		/*
		 * When cache_oblivious is disabled and ptr is not page aligned,
		 * the allocation was not sampled -- usize can be used to
		 * determine szind directly.
		 */
		alloc_ctx.szind = sz_size2index(usize);
		alloc_ctx.slab = true;
		ctx = &alloc_ctx;
		if (config_debug) {
			alloc_ctx_t dbg_ctx;
			rtree_ctx_t *rtree_ctx = tsd_rtree_ctx(tsd);
			rtree_szind_slab_read(tsd_tsdn(tsd), &extents_rtree,
			    rtree_ctx, (uintptr_t)ptr, true, &dbg_ctx.szind,
			    &dbg_ctx.slab);
			assert(dbg_ctx.szind == alloc_ctx.szind);
			assert(dbg_ctx.slab == alloc_ctx.slab);
		}
	} else if (config_prof && opt_prof) {
		rtree_ctx_t *rtree_ctx = tsd_rtree_ctx(tsd);
		rtree_szind_slab_read(tsd_tsdn(tsd), &extents_rtree, rtree_ctx,
		    (uintptr_t)ptr, true, &alloc_ctx.szind, &alloc_ctx.slab);
		assert(alloc_ctx.szind == sz_size2index(usize));
		ctx = &alloc_ctx;
	} else {
		ctx = NULL;
	}

	if (config_prof && opt_prof) {
		prof_free(tsd, ptr, usize, ctx);
	}
	if (config_stats) {
		*tsd_thread_deallocatedp_get(tsd) += usize;
	}

	if (likely(!slow_path)) {
		isdalloct(tsd_tsdn(tsd), ptr, usize, tcache, ctx, false);
	} else {
		isdalloct(tsd_tsdn(tsd), ptr, usize, tcache, ctx, true);
	}
}

JEMALLOC_EXPORT JEMALLOC_ALLOCATOR JEMALLOC_RESTRICT_RETURN
void JEMALLOC_NOTHROW *