Function imalloc_body

deps/jemalloc/src/jemalloc.c:2027–2225

}

JEMALLOC_ALWAYS_INLINE int
imalloc_body(static_opts_t *sopts, dynamic_opts_t *dopts, tsd_t *tsd) {
	/* Where the actual allocated memory will live. */
	void *allocation = NULL;
	/* Filled in by compute_size_with_overflow below. */
	size_t size = 0;
	/*
	 * For unaligned allocations, we need only ind.  For aligned
	 * allocations, or in case of stats or profiling we need usize.
	 *
	 * These are actually dead stores, in that their values are reset before
	 * any branch on their value is taken.  Sometimes though, it's
	 * convenient to pass them as arguments before this point.  To avoid
	 * undefined behavior then, we initialize them with dummy stores.
	 */
	szind_t ind = 0;
	size_t usize = 0;

	/* Reentrancy is only checked on slow path. */
	int8_t reentrancy_level;

	/* Compute the amount of memory the user wants. */
	if (unlikely(compute_size_with_overflow(sopts->may_overflow, dopts,
	    &size))) {
		goto label_oom;
	}

	if (unlikely(dopts->alignment < sopts->min_alignment
	    || (dopts->alignment & (dopts->alignment - 1)) != 0)) {
		goto label_invalid_alignment;
	}

	/* This is the beginning of the "core" algorithm. */

	if (dopts->alignment == 0) {
		ind = sz_size2index(size);
		if (unlikely(ind >= SC_NSIZES)) {
			goto label_oom;
		}
		if (config_stats || (config_prof && opt_prof) || sopts->usize) {
			usize = sz_index2size(ind);
			dopts->usize = usize;
			assert(usize > 0 && usize
			    <= SC_LARGE_MAXCLASS);
		}
	} else {
		if (sopts->bump_empty_aligned_alloc) {
			if (unlikely(size == 0)) {
				size = 1;
			}
		}
		usize = sz_sa2u(size, dopts->alignment);
		dopts->usize = usize;
		if (unlikely(usize == 0
		    || usize > SC_LARGE_MAXCLASS)) {
			goto label_oom;
		}
	}