[release/5.0] Browser support for Debugger::Break. (#45038)

* Implementing support to Debugger::Break.

* Fix fix backport

* Fix the line number of the break command

Co-authored-by: Thays <thaystg@gmail.com>

src/mono/mono/mini/mini-wasm-debugger.c

@@ -416,6 +416,7 @@ mono_wasm_debugger_init (void)
 	objrefs = g_hash_table_new_full (NULL, NULL, NULL, mono_debugger_free_objref);
 
 	mini_get_dbg_callbacks ()->handle_exception = handle_exception;
+	mini_get_dbg_callbacks ()->user_break = mono_wasm_user_break;
 }
 
 MONO_API void
@@ -626,6 +627,12 @@ mono_wasm_breakpoint_hit (void)
 	// mono_wasm_fire_bp ();
 }
 
+void
+mono_wasm_user_break (void)
+{
+	mono_wasm_fire_bp ();
+}
+
 EMSCRIPTEN_KEEPALIVE int
 mono_wasm_current_bp_id (void)
 {

src/mono/mono/mini/mini-wasm.h

@@ -111,5 +111,6 @@ void mono_wasm_set_timeout (int timeout, int id);
 
 void mono_wasm_single_step_hit (void);
 void mono_wasm_breakpoint_hit (void);
+void mono_wasm_user_break (void);
 
 #endif /* __MONO_MINI_WASM_H__ */  

src/mono/wasm/debugger/DebuggerTestSuite/Tests.cs

@@ -1984,10 +1984,27 @@ async Task LoadAssemblyDynamically(string asm_file, string pdb_file)
         }
 
         [Fact]
-        public async Task StepOverHiddenSequencePoint()
+        public async Task BreakOnDebuggerBreak()
         {
             var insp = new Inspector();
+            //Collect events
+            var scripts = SubscribeToScripts(insp);
 
+            await Ready();
+            await insp.Ready(async (cli, token) =>
+            {
+                ctx = new DebugTestContext(cli, insp, token, scripts);
+                await EvaluateAndCheck(
+                    "window.setTimeout(function() { invoke_static_method_async('[debugger-test] UserBreak:BreakOnDebuggerBreakCommand'); }, 1);",
+                    "dotnet://debugger-test.dll/debugger-test2.cs", 54, 4,
+                    "BreakOnDebuggerBreakCommand");
+            });
+        }
+
+        [Fact]
+        public async Task StepOverHiddenSequencePoint()
+        {
+            var insp = new Inspector();
             //Collect events
             var scripts = SubscribeToScripts(insp);
 

src/mono/wasm/debugger/tests/debugger-test/debugger-test2.cs

@@ -2,7 +2,7 @@
 // The .NET Foundation licenses this file to you under the MIT license.
 
 using System;
-
+using System.Diagnostics;
 public class Misc
 { //Only append content to this class as the test suite depends on line info
     public static int CreateObject(int foo, int bar)
@@ -49,3 +49,10 @@ public static void Types()
         var d = usMin + usMax;
     }
 }
+
+public class UserBreak {
+    public static void BreakOnDebuggerBreakCommand()
+    {
+        Debugger.Break();
+    }
+}