586 	uint32_t stackshotbuf_size = 0;  in kern_stack_snapshot_internal()  local
738 	stackshotbuf_size = stackshot_estimate =  in kern_stack_snapshot_internal()
743 	    flags, stackshotbuf_size, pid, since_timestamp);  in kern_stack_snapshot_internal()
746 	for (; stackshotbuf_size <= max_tracebuf_size; stackshotbuf_size <<= 1) {  in kern_stack_snapshot_internal()
747 		if (kmem_alloc(kernel_map, (vm_offset_t *)&stackshotbuf, stackshotbuf_size,  in kern_stack_snapshot_internal()
757 		kcdata_p = kcdata_memory_alloc_init((mach_vm_address_t)stackshotbuf, hdr_tag, stackshotbuf_size,  in kern_stack_snapshot_internal()
786 		kdp_snapshot_preflight(pid, stackshotbuf, stackshotbuf_size, flags, kcdata_p, since_timestamp,  in kern_stack_snapshot_internal()
809 			kmem_free(kernel_map, (vm_offset_t)stackshotbuf, stackshotbuf_size);  in kern_stack_snapshot_internal()
816 				    time_end - time_start, stackshot_estimate, stackshotbuf_size);  in kern_stack_snapshot_internal()
830 		assert(bytes_traced <= stackshotbuf_size);  in kern_stack_snapshot_internal()
846 		size_to_free = stackshotbuf_size - (int) VM_MAP_ROUND_PAGE(bytes_traced, PAGE_MASK);  in kern_stack_snapshot_internal()
851 			buf_to_free = (void *)((uint64_t)stackshotbuf + stackshotbuf_size - size_to_free);  in kern_stack_snapshot_internal()
855 		stackshotbuf_size = 0;  in kern_stack_snapshot_internal()
859 	if (stackshotbuf_size > max_tracebuf_size) {  in kern_stack_snapshot_internal()
866 		    error, tot_interrupts_off_abs, stackshotbuf_size, bytes_traced);  in kern_stack_snapshot_internal()
875 		kmem_free(kernel_map, (vm_offset_t)stackshotbuf, stackshotbuf_size);  in kern_stack_snapshot_internal()