56 	/* The lock protects mode, size, area and t. */
62 	void			*area;  member
67 	/* Size of remote area (in long's). */
137 	struct kcov_remote_area *area;  in kcov_remote_area_get()  local
141 		area = list_entry(pos, struct kcov_remote_area, list);  in kcov_remote_area_get()
142 		if (area->size == size) {  in kcov_remote_area_get()
143 			list_del(&area->list);  in kcov_remote_area_get()
144 			return area;  in kcov_remote_area_get()
151 static void kcov_remote_area_put(struct kcov_remote_area *area,  in kcov_remote_area_put()  argument
154 	INIT_LIST_HEAD(&area->list);  in kcov_remote_area_put()
155 	area->size = size;  in kcov_remote_area_put()
156 	list_add(&area->list, &kcov_remote_areas);  in kcov_remote_area_put()
158 	 * KMSAN doesn't instrument this file, so it may not know area->list  in kcov_remote_area_put()
162 	kmsan_unpoison_memory(&area->list, sizeof(area->list));  in kcov_remote_area_put()
212 	unsigned long *area;  in __sanitizer_cov_trace_pc()  local
220 	area = t->kcov_area;  in __sanitizer_cov_trace_pc()
222 	pos = READ_ONCE(area[0]) + 1;  in __sanitizer_cov_trace_pc()
231 		WRITE_ONCE(area[0], pos);  in __sanitizer_cov_trace_pc()
233 		area[pos] = ip;  in __sanitizer_cov_trace_pc()
242 	u64 *area;  in write_comp_data()  local
255 	area = (u64 *)t->kcov_area;  in write_comp_data()
258 	count = READ_ONCE(area[0]);  in write_comp_data()
265 		WRITE_ONCE(area[0], count + 1);  in write_comp_data()
267 		area[start_index] = type;  in write_comp_data()
268 		area[start_index + 1] = arg1;  in write_comp_data()
269 		area[start_index + 2] = arg2;  in write_comp_data()
270 		area[start_index + 3] = ip;  in write_comp_data()
357 			unsigned int size, void *area, enum kcov_mode mode,  in kcov_start()  argument
360 	kcov_debug("t = %px, size = %u, area = %px\n", t, size, area);  in kcov_start()
364 	t->kcov_area = area;  in kcov_start()
439 		vfree(kcov->area);  in kcov_put()
497 	if (kcov->area == NULL || vma->vm_pgoff != 0 ||  in kcov_mmap()
505 		page = vmalloc_to_page(kcov->area + off);  in kcov_mmap()
554  * Fault in a lazily-faulted vmalloc area before it can be used by
561 	unsigned long *area = kcov->area;  in kcov_fault_in_area()  local
565 		READ_ONCE(area[offset]);  in kcov_fault_in_area()
603 		if (kcov->mode != KCOV_MODE_INIT || !kcov->area)  in kcov_ioctl_locked()
613 		kcov_start(t, kcov, kcov->size, kcov->area, kcov->mode,  in kcov_ioctl_locked()
631 		if (kcov->mode != KCOV_MODE_INIT || !kcov->area)  in kcov_ioctl_locked()
701 	void *area;  in kcov_ioctl()  local
716 		area = vmalloc_user(size * sizeof(unsigned long));  in kcov_ioctl()
717 		if (area == NULL)  in kcov_ioctl()
722 			vfree(area);  in kcov_ioctl()
725 		kcov->area = area;  in kcov_ioctl()
804  * provided handle, allocates an area for coverage collection, and saves the
805  * pointers to kcov and area into the current task_struct to allow coverage to
808  * collecting coverage and copies all collected coverage into the kcov area.
855 	void *area;  in kcov_remote_start()  local
906 		area = kcov_remote_area_get(size);  in kcov_remote_start()
909 		area = this_cpu_ptr(&kcov_percpu_data)->irq_area;  in kcov_remote_start()
914 	if (!area) {  in kcov_remote_start()
916 		area = vmalloc(size * sizeof(unsigned long));  in kcov_remote_start()
917 		if (!area) {  in kcov_remote_start()
925 	*(u64 *)area = 0;  in kcov_remote_start()
931 	kcov_start(t, kcov, size, area, mode, sequence);  in kcov_remote_start()
999 	void *area;  in kcov_remote_stop()  local
1030 	area = t->kcov_area;  in kcov_remote_stop()
1046 		kcov_move_area(kcov->mode, kcov->area, kcov->size, area);  in kcov_remote_stop()
1051 		kcov_remote_area_put(area, size);  in kcov_remote_stop()
1084 	 * We set kcov_mode to enable tracing, but don't setup the area,  in selftest()
1102 		void *area = vmalloc_node(CONFIG_KCOV_IRQ_AREA_SIZE *  in kcov_init()  local
1104 		if (!area)  in kcov_init()
1106 		per_cpu_ptr(&kcov_percpu_data, cpu)->irq_area = area;  in kcov_init()