add test for virtio_console

Makefile

@@ -301,6 +301,7 @@ expect-tests: all-debug build/libwabt.js
 
 devices-test: all-debug
 	./tests/devices/virtio_9p.js
+	./tests/devices/virtio-console.js
 
 rust-test: $(RUST_FILES)
 	env RUSTFLAGS="-D warnings" RUST_BACKTRACE=full RUST_TEST_THREADS=1 cargo test -- --nocapture

tests/devices/virtio_console.js

@@ -0,0 +1,79 @@
+#!/usr/bin/env node
+"use strict";
+
+process.on("unhandledRejection", exn => { throw exn; });
+
+const TEST_RELEASE_BUILD = +process.env.TEST_RELEASE_BUILD;
+const SHOW_LOGS = false;
+
+var V86 = require(`../../build/${TEST_RELEASE_BUILD ? "libv86" : "libv86-debug"}.js`).V86;
+const fs = require("fs");
+
+const emulator = new V86({
+    bios: { url: __dirname + "/../../bios/seabios.bin" },
+    vga_bios: { url: __dirname + "/../../bios/vgabios.bin" },
+    cdrom: { url: __dirname + "/../../images/linux4.iso" },
+    autostart: true,
+    memory_size: 512 * 1024 * 1024,
+    bzimage_initrd_from_filesystem: true,
+    cmdline: [
+        "console=ttyS0",
+        "rw apm=off vga=0x344 video=vesafb:ypan,vremap:8",
+        "root=host9p rootfstype=9p rootflags=trans=virtio,cache=loose mitigations=off",
+        "audit=0 init=/usr/bin/init-openrc net.ifnames=0 biosdevname=0",
+    ].join(" "),
+    filesystem: {
+        basefs: "images/fs.json",
+        baseurl: "images/arch-nongz/",
+    },
+    disable_jit: +process.env.DISABLE_JIT,
+    log_level: SHOW_LOGS ? 0x400000 : 0,
+    virtio_console: true,
+});
+
+let line = "";
+let sent_command = false;
+
+emulator.add_listener("serial0-output-byte", function(byte)
+{
+    var chr = String.fromCharCode(byte);
+
+    process.stdout.write(chr);
+
+    if(chr === "\n")
+    {
+        line = "";
+    }
+    else
+    {
+        line += chr;
+    }
+
+    // TODO: use better prompt detection once it's configured to not print colours
+    if(!sent_command && line.endsWith("# ") && line.includes("root@localhost"))
+    {
+        sent_command = true;
+        emulator.serial0_send("lspci -vv; /etc/openrc/init.d/udev start; echo ping > /dev/hvc0\n");
+    }
+
+    if(line.endsWith("pong"))
+    {
+        console.log("\nTest passed");
+        emulator.stop();
+    }
+});
+
+let got_output = false;
+
+emulator.add_listener("virtio-console0-output-bytes", function(bytes)
+{
+    if(!got_output)
+    {
+        got_output = true;
+        console.log("From virtio console:", String.fromCharCode.apply(String, bytes));
+        emulator.serial0_send("cat /dev/hvc0\n");
+        setTimeout(() => {
+            emulator.bus.send("virtio-console0-input-bytes", Uint8Array.from(Buffer.from("pong\n")));
+        }, 5000);
+    }
+});