chore: replace link() with getModule()

fix stack overflow bug in State.deinit
allow for code in another thread to signal shutdown to gdbstub

build.zig

@@ -1,54 +1,44 @@
 const std = @import("std");
+const CompileStep = std.Build.CompileStep;
 
 fn path(comptime suffix: []const u8) []const u8 {
     if (suffix[0] == '/') @compileError("expected a relative path");
     return comptime (std.fs.path.dirname(@src().file) orelse ".") ++ std.fs.path.sep_str ++ suffix;
 }
 
-const pkgs = struct {
-    const Pkg = std.build.Pkg;
-
-    pub const gdbstub: Pkg = .{
-        .name = "gdbstub",
-        .source = .{ .path = path("src/lib.zig") },
-        .dependencies = &[_]Pkg{network},
-    };
-
+pub fn getModule(b: *std.Build) *std.build.Module {
     // https://github.com/MasterQ32/zig-network
-    pub const network: Pkg = .{
-        .name = "network",
-        .source = .{ .path = path("lib/zig-network/network.zig") },
-    };
-};
+    const network = b.createModule(.{ .source_file = .{ .path = path("lib/zig-network/network.zig") } });
 
-pub fn link(exe: *std.build.LibExeObjStep) void {
-    exe.addPackage(pkgs.gdbstub);
+    return b.createModule(.{
+        .source_file = .{ .path = path("src/lib.zig") },
+        .dependencies = &.{.{ .name = "network", .module = network }},
+    });
 }
 
-pub fn build(b: *std.build.Builder) void {
+pub fn build(b: *std.Build) void {
     const target = b.standardTargetOptions(.{});
-    _ = target;
-    const mode = b.standardReleaseOptions();
+    // const optimize = b.standardOptimizeOption(.{});
 
-    // -- library --
-    const lib = b.addStaticLibrary("gdbstub", "src/lib.zig");
-    lib.addPackage(pkgs.network);
+    // -- Library --
 
-    lib.setBuildMode(mode);
-    lib.install();
+    const lib_test = b.addTest(.{
+        .root_source_file = .{ .path = "src/lib.zig" },
+        .target = target,
+    });
 
-    const lib_tests = b.addTest("src/lib.zig");
-    lib_tests.setBuildMode(mode);
+    const test_step = b.step("test", "Run Library Tests");
+    test_step.dependOn(&lib_test.step);
 
-    const test_step = b.step("lib-test", "Run Library Tests");
-    test_step.dependOn(&lib_tests.step);
+    // -- Executable --
 
-    // // -- Executable --
-    // const exe = b.addExecutable("gdbserver", "src/main.zig");
+    // const exe = b.addExecutable(.{
+    //     .name = "gdbserver",
+    //     .root_source_file = .{ .path = "src/main.zig" },
+    //     .target = target,
+    //     .optimize = optimize,
+    // });
     // link(exe);
-
-    // exe.setTarget(target);
-    // exe.setBuildMode(mode);
     // exe.install();
 
     // const run_cmd = exe.run();

src/Server.zig

@@ -4,6 +4,7 @@ const Packet = @import("Packet.zig");
 
 const Socket = network.Socket;
 const Allocator = std.mem.Allocator;
+const Atomic = std.atomic.Atomic;
 const Emulator = @import("lib.zig").Emulator;
 
 const Self = @This();
@@ -94,16 +95,21 @@ const Action = union(enum) {
     nack,
 };
 
-pub fn run(self: *Self, allocator: Allocator) !void {
+pub fn run(self: *Self, allocator: Allocator, quit: *Atomic(bool)) !void {
     var buf: [Packet.max_len]u8 = undefined;
 
     while (true) {
         const len = try self.client.receive(&buf);
         if (len == 0) break;
 
+        if (quit.load(.Monotonic)) break;
         const action = try self.parse(allocator, buf[0..len]);
         try self.send(allocator, action);
     }
+
+    // Just in case its the gdbstub that exited first,
+    // attempt to signal to the GUI that it should also exit
+    quit.store(true, .Monotonic);
 }
 
 fn parse(self: *Self, allocator: Allocator, input: []const u8) !Action {

src/State.zig

@@ -25,7 +25,7 @@ const SwBkpt = struct {
     }
 
     pub fn deinit(self: *@This()) void {
-        self.deinit();
+        self.list.deinit();
         self.* = undefined;
     }
 
@@ -47,7 +47,7 @@ const SwBkpt = struct {
     }
 
     pub fn remove(self: *@This(), addr: u32) void {
-        for (self.list.items) |bkpt, i| {
+        for (self.list.items, 0..) |bkpt, i| {
             if (bkpt.addr == addr) {
                 _ = self.list.orderedRemove(i);
                 log.debug("Removed Breakpoint at 0x{X:0>8}", .{addr});
@@ -73,7 +73,7 @@ const HwBkpt = struct {
     }
 
     pub fn add(self: *@This(), addr: u32, kind: u32) !void {
-        for (self.list) |*bkpt_opt| {
+        for (&self.list) |*bkpt_opt| {
             if (bkpt_opt.*) |bkpt| {
                 if (bkpt.addr == addr) return; // idempotent
             } else {
@@ -88,7 +88,7 @@ const HwBkpt = struct {
     }
 
     pub fn remove(self: *@This(), addr: u32) void {
-        for (self.list) |*bkpt_opt| {
+        for (&self.list) |*bkpt_opt| {
             const bkpt = bkpt_opt.* orelse continue;
 
             if (bkpt.addr == addr) {