1 files changed, 91 insertions, 0 deletions
diff --git a/contrib/llvm-project/lldb/source/Plugins/ScriptInterpreter/Lua/Lua.cpp b/contrib/llvm-project/lldb/source/Plugins/ScriptInterpreter/Lua/Lua.cpp
new file mode 100644
index 000000000000..acd6128d84c5
--- /dev/null
+++ b/contrib/llvm-project/lldb/source/Plugins/ScriptInterpreter/Lua/Lua.cpp
@@ -0,0 +1,91 @@
+//===-- Lua.cpp -----------------------------------------------------------===//
+//
+// 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 "Lua.h"
+#include "lldb/Host/FileSystem.h"
+#include "lldb/Utility/FileSpec.h"
+#include "llvm/Support/FormatVariadic.h"
+
+using namespace lldb_private;
+using namespace lldb;
+
+llvm::Error Lua::Run(llvm::StringRef buffer) {
+  int error =
+      luaL_loadbuffer(m_lua_state, buffer.data(), buffer.size(), "buffer") ||
+      lua_pcall(m_lua_state, 0, 0, 0);
+  if (!error)
+    return llvm::Error::success();
+
+  llvm::Error e = llvm::make_error<llvm::StringError>(
+      llvm::formatv("{0}\n", lua_tostring(m_lua_state, -1)),
+      llvm::inconvertibleErrorCode());
+  // Pop error message from the stack.
+  lua_pop(m_lua_state, 1);
+  return e;
+}
+
+llvm::Error Lua::LoadModule(llvm::StringRef filename) {
+  FileSpec file(filename);
+  if (!FileSystem::Instance().Exists(file)) {
+    return llvm::make_error<llvm::StringError>("invalid path",
+                                               llvm::inconvertibleErrorCode());
+  }
+
+  ConstString module_extension = file.GetFileNameExtension();
+  if (module_extension != ".lua") {
+    return llvm::make_error<llvm::StringError>("invalid extension",
+                                               llvm::inconvertibleErrorCode());
+  }
+
+  int error = luaL_loadfile(m_lua_state, filename.data()) ||
+              lua_pcall(m_lua_state, 0, 1, 0);
+  if (error) {
+    llvm::Error e = llvm::make_error<llvm::StringError>(
+        llvm::formatv("{0}\n", lua_tostring(m_lua_state, -1)),
+        llvm::inconvertibleErrorCode());
+    // Pop error message from the stack.
+    lua_pop(m_lua_state, 1);
+    return e;
+  }
+
+  ConstString module_name = file.GetFileNameStrippingExtension();
+  lua_setglobal(m_lua_state, module_name.GetCString());
+  return llvm::Error::success();
+}
+
+llvm::Error Lua::ChangeIO(FILE *out, FILE *err) {
+  assert(out != nullptr);
+  assert(err != nullptr);
+
+  lua_getglobal(m_lua_state, "io");
+
+  lua_getfield(m_lua_state, -1, "stdout");
+  if (luaL_Stream *s = static_cast<luaL_Stream *>(
+          luaL_testudata(m_lua_state, -1, LUA_FILEHANDLE))) {
+    s->f = out;
+    lua_pop(m_lua_state, 1);
+  } else {
+    lua_pop(m_lua_state, 2);
+    return llvm::make_error<llvm::StringError>("could not get stdout",
+                                               llvm::inconvertibleErrorCode());
+  }
+
+  lua_getfield(m_lua_state, -1, "stderr");
+  if (luaL_Stream *s = static_cast<luaL_Stream *>(
+          luaL_testudata(m_lua_state, -1, LUA_FILEHANDLE))) {
+    s->f = out;
+    lua_pop(m_lua_state, 1);
+  } else {
+    lua_pop(m_lua_state, 2);
+    return llvm::make_error<llvm::StringError>("could not get stderr",
+                                               llvm::inconvertibleErrorCode());
+  }
+
+  lua_pop(m_lua_state, 1);
+  return llvm::Error::success();
+}