44 lines
2.0 KiB
Zig
44 lines
2.0 KiB
Zig
//! crash-test — a test fixture, not a driver: claims the device it is assigned,
|
|
//! hellos the device manager, announces itself, then faults on purpose. The
|
|
//! driver-restart scenario drives the manager's whole restart machinery with
|
|
//! it: fault → exit reason → backoff → respawn → the **same claim succeeding
|
|
//! again** (claim release on death, M17.1, through the manager's path) → the
|
|
//! crash-loop cap. Spawned bare (the initial-ramdisk sweep starts every bundled
|
|
//! binary), it exits silently so it cannot derange other tests.
|
|
|
|
const std = @import("std");
|
|
const ipc = @import("ipc");
|
|
const process = @import("process");
|
|
const time = @import("time");
|
|
const device = @import("driver");
|
|
const logging = @import("logging");
|
|
const device_manager_protocol = @import("device-manager-protocol");
|
|
|
|
pub fn main(init: process.Init) void {
|
|
const argument = init.arguments.get(1) orelse return; // bare: stay silent
|
|
const assigned = std.fmt.parseInt(u64, argument, 10) catch return;
|
|
|
|
// The respawn only reaches this line because the kernel released the
|
|
// previous instance's claim at death. A failed claim exits cleanly — the
|
|
// manager reads "meant to stop" and the scenario fails loudly by silence.
|
|
if (!device.claim(assigned)) {
|
|
_ = logging.write("crash-test: claim failed\n");
|
|
return;
|
|
}
|
|
|
|
var manager: ?ipc.Handle = null;
|
|
var tries: u32 = 0;
|
|
while (manager == null and tries < 100) : (tries += 1) {
|
|
manager = ipc.lookup(.device_manager);
|
|
if (manager == null) time.sleepMillis(20);
|
|
}
|
|
const h = manager orelse return;
|
|
const hello = device_manager_protocol.Hello{ .role = @intFromEnum(device_manager_protocol.Role.device), .device_id = assigned };
|
|
var reply: [device_manager_protocol.message_maximum]u8 = undefined;
|
|
_ = ipc.call(h, std.mem.asBytes(&hello), &reply) catch return;
|
|
|
|
_ = logging.write("crash-test: faulting now\n");
|
|
const poison: *volatile u32 = @ptrFromInt(0xdead0000);
|
|
poison.* = 1; // the restart machinery's fuel: a real segmentation fault
|
|
}
|