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[lldb/Lua] Make lldb.debugger et al available to Lua

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The Python script interpreter makes the current debugger, target,
process, thread and frame available to interactive scripting sessions
through convenience variables. This patch does the same for Lua.

Differential revision: https://reviews.llvm.org/D71801
This commit is contained in:
Jonas Devlieghere
2020-01-09 08:15:01 -08:00
parent 93a1e9c90c
commit 45c971f7ee
10 changed files with 89 additions and 3 deletions
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35
lldb/source/Plugins/ScriptInterpreter/Lua/ScriptInterpreterLua.cpp
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@@ -27,7 +27,13 @@ public:
: IOHandlerEditline(debugger, IOHandler::Type::LuaInterpreter, "lua",
">>> ", "..> ", true, debugger.GetUseColor(), 0,
*this, nullptr),
m_script_interpreter(script_interpreter) {}
m_script_interpreter(script_interpreter) {
llvm::cantFail(m_script_interpreter.EnterSession(debugger.GetID()));
}
~IOHandlerLuaInterpreter() {
llvm::cantFail(m_script_interpreter.LeaveSession());
}
void IOHandlerInputComplete(IOHandler &io_handler,
std::string &data) override {
@@ -89,6 +95,33 @@ void ScriptInterpreterLua::Initialize() {
void ScriptInterpreterLua::Terminate() {}
llvm::Error ScriptInterpreterLua::EnterSession(user_id_t debugger_id) {
if (m_session_is_active)
return llvm::Error::success();
const char *fmt_str =
"lldb.debugger = lldb.SBDebugger.FindDebuggerWithID({0}); "
"lldb.target = lldb.debugger:GetSelectedTarget(); "
"lldb.process = lldb.target:GetProcess(); "
"lldb.thread = lldb.process:GetSelectedThread(); "
"lldb.frame = lldb.thread:GetSelectedFrame()";
return m_lua->Run(llvm::formatv(fmt_str, debugger_id).str());
}
llvm::Error ScriptInterpreterLua::LeaveSession() {
if (!m_session_is_active)
return llvm::Error::success();
m_session_is_active = false;
llvm::StringRef str = "lldb.debugger = nil; "
"lldb.target = nil; "
"lldb.process = nil; "
"lldb.thread = nil; "
"lldb.frame = nil";
return m_lua->Run(str);
}
lldb::ScriptInterpreterSP
ScriptInterpreterLua::CreateInstance(Debugger &debugger) {
return std::make_shared<ScriptInterpreterLua>(debugger);