toolchain: add new debugging tool using magenta_debug

toolchain/mxdbg/client/main.c

@@ -0,0 +1,105 @@
+#include "context.h"
+#include "event.h"
+#include "repl.h"
+
+#include <fx/cmdline/cmd.h>
+#include <magenta/debug/packet.h>
+#include <signal.h>
+#include <stdio.h>
+#include <unistd.h>
+
+static struct debug_context ctx = {0};
+
+enum {
+	CMD_ROOT,
+
+	OPT_REMOTE,
+	OPT_REMOTE_ADDRESS,
+	OPT_REMOTE_PORT,
+};
+
+static void on_event(struct debug_context *ctx, struct packet *packet)
+{
+	event_handle(ctx, packet);
+}
+
+static int mxdbg(
+	const fx_command *self,
+	const fx_arglist *opt,
+	const fx_array *args)
+{
+	debug_context_init(&ctx);
+	ctx.ctx_on_event = on_event;
+
+	char *ep = NULL;
+
+	const char *ip_address = NULL;
+	const char *port_cstr = NULL;
+	fx_arglist_get_string(
+		opt,
+		OPT_REMOTE,
+		OPT_REMOTE_ADDRESS,
+		0,
+		&ip_address);
+	fx_arglist_get_string(opt, OPT_REMOTE, OPT_REMOTE_PORT, 0, &port_cstr);
+
+	int err = 0;
+	if (ip_address && port_cstr) {
+		long port = strtol(port_cstr, &ep, 10);
+		if (*ep) {
+			fprintf(stderr,
+			        "'%s' is not a valid port number.\n",
+			        port_cstr);
+			return -1;
+		}
+
+		printf("connecting to %s:%ld...\n", ip_address, port);
+		err = debug_context_connect_net(&ctx, ip_address, port);
+	} else {
+		printf("no target specified\n");
+		return 0;
+	}
+
+	if (err != 0) {
+		printf("connection failed\n");
+		return err;
+	}
+
+	debug_context_start_threads(&ctx);
+	err = repl(&ctx);
+
+	debug_context_cleanup(&ctx);
+
+	return err;
+}
+
+FX_COMMAND(CMD_ROOT, FX_COMMAND_INVALID_ID)
+{
+	FX_COMMAND_NAME("mxdbg");
+	FX_COMMAND_DESC("Magenta kernel debugger.");
+	FX_COMMAND_FLAGS(FX_COMMAND_SHOW_HELP_BY_DEFAULT);
+	FX_COMMAND_FUNCTION(mxdbg);
+
+	FX_COMMAND_OPTION(OPT_REMOTE)
+	{
+		FX_OPTION_LONG_NAME("remote");
+		FX_OPTION_SHORT_NAME('r');
+		FX_OPTION_DESC("The TCP/IP address and port to connect to.");
+		FX_OPTION_ARG(OPT_REMOTE_ADDRESS)
+		{
+			FX_ARG_NAME("ip-address");
+			FX_ARG_NR_VALUES(1);
+		}
+
+		FX_OPTION_ARG(OPT_REMOTE_PORT)
+		{
+			FX_ARG_NAME("port");
+			FX_ARG_NR_VALUES(1);
+		}
+	}
+}
+
+int main(int argc, const char **argv)
+{
+	return fx_command_dispatch(CMD_ROOT, argc, argv);
+}