add debugger placeholders

Author: krichprollsch

build.zig.zon

@@ -6,7 +6,7 @@
     .dependencies = .{
         .v8 = .{
             .url = "https://github.com/lightpanda-io/zig-v8-fork/archive/84cdca7cd9065f67c7933388f2091810fc485bc6.tar.gz",
-            .hash = "v8-0.0.0-xddH63bVAwBSEobaUok9J0er1FqsvEujCDDVy6I00",
+            .hash = "v8-0.0.0-xddH67vcAwCuN2gBsAO8TBzEw523KMroIKGrdZwc-Q-y",
         },
         //.v8 = .{ .path = "../zig-v8-fork" }
         .@"ada-singleheader" = .{

src/browser/js/Inspector.zig

@@ -28,7 +28,14 @@ pub fn init(allocator: Allocator, isolate: v8.Isolate, ctx: anytype) !Inspector
     // If necessary, turn a void context into something we can safely ptrCast
     const safe_context: *anyopaque = if (ContextT == void) @ptrCast(@constCast(&{})) else ctx;
 
-    const channel = v8.InspectorChannel.init(safe_context, InspectorContainer.onInspectorResponse, InspectorContainer.onInspectorEvent, isolate);
+    const channel = v8.InspectorChannel.init(
+        safe_context,
+        InspectorContainer.onInspectorResponse,
+        InspectorContainer.onInspectorEvent,
+        InspectorContainer.onRunMessageLoopOnPause,
+        InspectorContainer.onQuitMessageLoopOnPause,
+        isolate,
+    );
 
     const client = v8.InspectorClient.init();
 
@@ -109,6 +116,8 @@ pub fn getNodePtr(self: *const Inspector, allocator: Allocator, object_id: []con
 const NoopInspector = struct {
     pub fn onInspectorResponse(_: *anyopaque, _: u32, _: []const u8) void {}
     pub fn onInspectorEvent(_: *anyopaque, _: []const u8) void {}
+    pub fn onRunMessageLoopOnPause(_: *anyopaque, _: u32) void {}
+    pub fn onQuitMessageLoopOnPause(_: *anyopaque) void {}
 };
 
 pub fn getTaggedAnyOpaque(value: v8.Value) ?*js.TaggedAnyOpaque {

src/cdp/cdp.zig

@@ -632,6 +632,17 @@ pub fn BrowserContext(comptime CDP_T: type) type {
             };
         }
 
+        // debugger events
+        pub fn onRunMessageLoopOnPause(_: *anyopaque, _: u32) void {
+            // onRunMessageLoopOnPause is called when a breakpoint is hit.
+            // Until quit pause, we must continue to run a nested message loop
+            // to interact with the the debugger ony (ie. Chrome DevTools).
+        }
+
+        pub fn onQuitMessageLoopOnPause(_: *anyopaque) void {
+            // Quit breakpoint pause.
+        }
+
         // This is hacky x 2. First, we create the JSON payload by gluing our
         // session_id onto it. Second, we're much more client/websocket aware than
         // we should be.