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//===-- ScriptInterpreter.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 "lldb/Interpreter/ScriptInterpreter.h"
#include "lldb/Core/Debugger.h"
#include "lldb/Host/ConnectionFileDescriptor.h"
#include "lldb/Host/Pipe.h"
#include "lldb/Host/PseudoTerminal.h"
#include "lldb/Interpreter/CommandReturnObject.h"
#include "lldb/Utility/Status.h"
#include "lldb/Utility/Stream.h"
#include "lldb/Utility/StringList.h"
#if defined(_WIN32)
#include "lldb/Host/windows/ConnectionGenericFileWindows.h"
#endif
#include <memory>
#include <stdio.h>
#include <stdlib.h>
#include <string>
using namespace lldb;
using namespace lldb_private;
ScriptInterpreter::ScriptInterpreter(Debugger &debugger,
lldb::ScriptLanguage script_lang)
: m_debugger(debugger), m_script_lang(script_lang) {}
ScriptInterpreter::~ScriptInterpreter() {}
void ScriptInterpreter::CollectDataForBreakpointCommandCallback(
std::vector<BreakpointOptions *> &bp_options_vec,
CommandReturnObject &result) {
result.SetStatus(eReturnStatusFailed);
result.AppendError(
"This script interpreter does not support breakpoint callbacks.");
}
void ScriptInterpreter::CollectDataForWatchpointCommandCallback(
WatchpointOptions *bp_options, CommandReturnObject &result) {
result.SetStatus(eReturnStatusFailed);
result.AppendError(
"This script interpreter does not support watchpoint callbacks.");
}
bool ScriptInterpreter::LoadScriptingModule(
const char *filename, bool init_session, lldb_private::Status &error,
StructuredData::ObjectSP *module_sp) {
error.SetErrorString(
"This script interpreter does not support importing modules.");
return false;
}
std::string ScriptInterpreter::LanguageToString(lldb::ScriptLanguage language) {
switch (language) {
case eScriptLanguageNone:
return "None";
case eScriptLanguagePython:
return "Python";
case eScriptLanguageLua:
return "Lua";
case eScriptLanguageUnknown:
return "Unknown";
}
llvm_unreachable("Unhandled ScriptInterpreter!");
}
lldb::ScriptLanguage
ScriptInterpreter::StringToLanguage(const llvm::StringRef &language) {
if (language.equals_lower(LanguageToString(eScriptLanguageNone)))
return eScriptLanguageNone;
if (language.equals_lower(LanguageToString(eScriptLanguagePython)))
return eScriptLanguagePython;
if (language.equals_lower(LanguageToString(eScriptLanguageLua)))
return eScriptLanguageLua;
return eScriptLanguageUnknown;
}
Status ScriptInterpreter::SetBreakpointCommandCallback(
std::vector<BreakpointOptions *> &bp_options_vec,
const char *callback_text) {
Status return_error;
for (BreakpointOptions *bp_options : bp_options_vec) {
return_error = SetBreakpointCommandCallback(bp_options, callback_text);
if (return_error.Success())
break;
}
return return_error;
}
Status ScriptInterpreter::SetBreakpointCommandCallbackFunction(
std::vector<BreakpointOptions *> &bp_options_vec, const char *function_name,
StructuredData::ObjectSP extra_args_sp) {
Status error;
for (BreakpointOptions *bp_options : bp_options_vec) {
error = SetBreakpointCommandCallbackFunction(bp_options, function_name,
extra_args_sp);
if (!error.Success())
return error;
}
return error;
}
std::unique_ptr<ScriptInterpreterLocker>
ScriptInterpreter::AcquireInterpreterLock() {
return std::make_unique<ScriptInterpreterLocker>();
}
static void ReadThreadBytesReceived(void *baton, const void *src,
size_t src_len) {
if (src && src_len) {
Stream *strm = (Stream *)baton;
strm->Write(src, src_len);
strm->Flush();
}
}
llvm::Expected<std::unique_ptr<ScriptInterpreterIORedirect>>
ScriptInterpreterIORedirect::Create(bool enable_io, Debugger &debugger,
CommandReturnObject *result) {
if (enable_io)
return std::unique_ptr<ScriptInterpreterIORedirect>(
new ScriptInterpreterIORedirect(debugger, result));
auto nullin = FileSystem::Instance().Open(FileSpec(FileSystem::DEV_NULL),
File::eOpenOptionRead);
if (!nullin)
return nullin.takeError();
auto nullout = FileSystem::Instance().Open(FileSpec(FileSystem::DEV_NULL),
File::eOpenOptionWrite);
if (!nullout)
return nullin.takeError();
return std::unique_ptr<ScriptInterpreterIORedirect>(
new ScriptInterpreterIORedirect(std::move(*nullin), std::move(*nullout)));
}
ScriptInterpreterIORedirect::ScriptInterpreterIORedirect(
std::unique_ptr<File> input, std::unique_ptr<File> output)
: m_input_file_sp(std::move(input)),
m_output_file_sp(std::make_shared<StreamFile>(std::move(output))),
m_error_file_sp(m_output_file_sp),
m_communication("lldb.ScriptInterpreterIORedirect.comm"),
m_disconnect(false) {}
ScriptInterpreterIORedirect::ScriptInterpreterIORedirect(
Debugger &debugger, CommandReturnObject *result)
: m_communication("lldb.ScriptInterpreterIORedirect.comm"),
m_disconnect(false) {
if (result) {
m_input_file_sp = debugger.GetInputFileSP();
Pipe pipe;
Status pipe_result = pipe.CreateNew(false);
#if defined(_WIN32)
lldb::file_t read_file = pipe.GetReadNativeHandle();
pipe.ReleaseReadFileDescriptor();
std::unique_ptr<ConnectionGenericFile> conn_up =
std::make_unique<ConnectionGenericFile>(read_file, true);
#else
std::unique_ptr<ConnectionFileDescriptor> conn_up =
std::make_unique<ConnectionFileDescriptor>(
pipe.ReleaseReadFileDescriptor(), true);
#endif
if (conn_up->IsConnected()) {
m_communication.SetConnection(std::move(conn_up));
m_communication.SetReadThreadBytesReceivedCallback(
ReadThreadBytesReceived, &result->GetOutputStream());
m_communication.StartReadThread();
m_disconnect = true;
FILE *outfile_handle = fdopen(pipe.ReleaseWriteFileDescriptor(), "w");
m_output_file_sp = std::make_shared<StreamFile>(outfile_handle, true);
m_error_file_sp = m_output_file_sp;
if (outfile_handle)
::setbuf(outfile_handle, nullptr);
result->SetImmediateOutputFile(debugger.GetOutputStream().GetFileSP());
result->SetImmediateErrorFile(debugger.GetErrorStream().GetFileSP());
}
}
if (!m_input_file_sp || !m_output_file_sp || !m_error_file_sp)
debugger.AdoptTopIOHandlerFilesIfInvalid(m_input_file_sp, m_output_file_sp,
m_error_file_sp);
}
void ScriptInterpreterIORedirect::Flush() {
if (m_output_file_sp)
m_output_file_sp->Flush();
if (m_error_file_sp)
m_error_file_sp->Flush();
}
ScriptInterpreterIORedirect::~ScriptInterpreterIORedirect() {
if (!m_disconnect)
return;
assert(m_output_file_sp);
assert(m_error_file_sp);
assert(m_output_file_sp == m_error_file_sp);
// Close the write end of the pipe since we are done with our one line
// script. This should cause the read thread that output_comm is using to
// exit.
m_output_file_sp->GetFile().Close();
// The close above should cause this thread to exit when it gets to the end
// of file, so let it get all its data.
m_communication.JoinReadThread();
// Now we can close the read end of the pipe.
m_communication.Disconnect();
}
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