[Lldb-commits] [lldb] [lldb] Add lldb-mcp scaffolding (PR #155708)

[John Harrison via lldb-commits]

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@@ -0,0 +1,80 @@
+//===----------------------------------------------------------------------===//
+//
+// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
+// See https://llvm.org/LICENSE.txt for license information.
+// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
+//
+//===----------------------------------------------------------------------===//
+
+#include "lldb/Host/Config.h"
+#include "lldb/Host/File.h"
+#include "lldb/Host/MainLoop.h"
+#include "lldb/Host/MainLoopBase.h"
+#include "lldb/Protocol/MCP/Protocol.h"
+#include "lldb/Protocol/MCP/Server.h"
+#include "llvm/ADT/StringRef.h"
+#include "llvm/Support/InitLLVM.h"
+#include "llvm/Support/Signals.h"
+#include "llvm/Support/WithColor.h"
+
+using namespace lldb_protocol::mcp;
+
+using lldb_private::File;
+using lldb_private::MainLoop;
+using lldb_private::MainLoopBase;
+using lldb_private::NativeFile;
+
+static constexpr llvm::StringLiteral kName = "lldb-mcp";
+static constexpr llvm::StringLiteral kVersion = "0.1.0";
+
+int main(int argc, char *argv[]) {
+  llvm::InitLLVM IL(argc, argv, /*InstallPipeSignalExitHandler=*/false);
+#if !defined(__APPLE__)
+  llvm::setBugReportMsg("PLEASE submit a bug report to " LLDB_BUG_REPORT_URL
+                        " and include the crash backtrace.\n");
+#else
+  llvm::setBugReportMsg("PLEASE submit a bug report to " LLDB_BUG_REPORT_URL
+                        " and include the crash report from "
+                        "~/Library/Logs/DiagnosticReports/.\n");
+#endif
+
+#if defined(_WIN32)
+  // Windows opens stdout and stdin in text mode which converts \n to 13,10
+  // while the value is just 10 on Darwin/Linux. Setting the file mode to
+  // binary fixes this.
+  int result = _setmode(fileno(stdout), _O_BINARY);
+  assert(result);
+  result = _setmode(fileno(stdin), _O_BINARY);
+  UNUSED_IF_ASSERT_DISABLED(result);
+  assert(result);
+#endif
+
+  lldb::IOObjectSP input = std::make_shared<NativeFile>(
+      fileno(stdin), File::eOpenOptionReadOnly, NativeFile::Unowned);
+
+  lldb::IOObjectSP output = std::make_shared<NativeFile>(
+      fileno(stdout), File::eOpenOptionReadOnly, NativeFile::Unowned);
+
+  constexpr llvm::StringLiteral client_name = "stdio";
+  static MainLoop loop;
+
+  llvm::sys::SetInterruptFunction([]() {
+    loop.AddPendingCallback(
+        [](MainLoopBase &loop) { loop.RequestTermination(); });
+  });
+
+  auto transport_up = std::make_unique<lldb_protocol::mcp::MCPTransport>(
+      input, output, std::string(client_name),
+      [&](llvm::StringRef message) { llvm::errs() << message << '\n'; });
+
+  auto instance_up = std::make_unique<lldb_protocol::mcp::Server>(
+      std::string(kName), std::string(kVersion), std::move(transport_up), loop);
+
+  if (llvm::Error error = instance_up->Run()) {
+    llvm::logAllUnhandledErrors(std::move(error), llvm::WithColor::error(),
+                                "DAP session error: ");
----------------
ashgti wrote:

`s/DAP/MCP/`?

https://github.com/llvm/llvm-project/pull/155708