| //===-- Debugger.cpp --------------------------------------------*- C++ -*-===// |
| // |
| // The LLVM Compiler Infrastructure |
| // |
| // This file is distributed under the University of Illinois Open Source |
| // License. See LICENSE.TXT for details. |
| // |
| //===----------------------------------------------------------------------===// |
| |
| #include "lldb/lldb-private.h" |
| #include "lldb/Core/ConnectionFileDescriptor.h" |
| #include "lldb/Core/Debugger.h" |
| #include "lldb/Core/InputReader.h" |
| #include "lldb/Core/State.h" |
| #include "lldb/Core/Timer.h" |
| |
| #include "lldb/Target/TargetList.h" |
| #include "lldb/Target/Process.h" |
| #include "lldb/Target/Thread.h" |
| |
| |
| using namespace lldb; |
| using namespace lldb_private; |
| |
| int Debugger::g_shared_debugger_refcount = 0; |
| bool Debugger::g_in_terminate = false; |
| |
| Debugger::DebuggerSP & |
| Debugger::GetDebuggerSP () |
| { |
| static DebuggerSP g_shared_debugger_sp; |
| return g_shared_debugger_sp; |
| } |
| |
| void |
| Debugger::Initialize () |
| { |
| g_shared_debugger_refcount++; |
| if (GetDebuggerSP().get() == NULL) |
| { |
| GetDebuggerSP().reset (new Debugger()); |
| lldb_private::Initialize(); |
| GetDebuggerSP()->GetCommandInterpreter().Initialize(); |
| } |
| } |
| |
| void |
| Debugger::Terminate () |
| { |
| g_shared_debugger_refcount--; |
| if (g_shared_debugger_refcount == 0) |
| { |
| // Because Terminate is called also in the destructor, we need to make sure |
| // that none of the calls to GetSharedInstance leads to a call to Initialize, |
| // thus bumping the refcount back to 1 & causing Debugger::~Debugger to try to |
| // re-terminate. So we use g_in_terminate to indicate this condition. |
| // When we can require at least Initialize to be called, we won't have to do |
| // this since then the GetSharedInstance won't have to auto-call Initialize... |
| |
| g_in_terminate = true; |
| int num_targets = GetDebuggerSP()->GetTargetList().GetNumTargets(); |
| for (int i = 0; i < num_targets; i++) |
| { |
| ProcessSP process_sp(GetDebuggerSP()->GetTargetList().GetTargetAtIndex (i)->GetProcessSP()); |
| if (process_sp) |
| process_sp->Destroy(); |
| } |
| GetDebuggerSP()->DisconnectInput(); |
| lldb_private::WillTerminate(); |
| GetDebuggerSP().reset(); |
| } |
| } |
| |
| Debugger & |
| Debugger::GetSharedInstance() |
| { |
| // Don't worry about thread race conditions with the code below as |
| // lldb_private::Initialize(); does this in a thread safe way. I just |
| // want to avoid having to lock and unlock a mutex in |
| // lldb_private::Initialize(); every time we want to access the |
| // Debugger shared instance. |
| |
| // FIXME: We intend to require clients to call Initialize by hand (since they |
| // will also have to call Terminate by hand.) But for now it is not clear where |
| // we can reliably call these in JH. So the present version initializes on first use |
| // here, and terminates in the destructor. |
| if (g_shared_debugger_refcount == 0 && !g_in_terminate) |
| Initialize(); |
| |
| assert(GetDebuggerSP().get()!= NULL); |
| return *(GetDebuggerSP().get()); |
| } |
| |
| Debugger::Debugger () : |
| m_input_comm("debugger.input"), |
| m_input_file (), |
| m_output_file (), |
| m_error_file (), |
| m_async_execution (true), |
| m_target_list (), |
| m_listener ("lldb.Debugger"), |
| m_source_manager (), |
| m_command_interpreter (eScriptLanguageDefault, false, &m_listener, m_source_manager), |
| m_input_readers (), |
| m_input_reader_data () |
| { |
| } |
| |
| Debugger::~Debugger () |
| { |
| // FIXME: |
| // Remove this once this version of lldb has made its way through a build. |
| Terminate(); |
| } |
| |
| |
| bool |
| Debugger::GetAsyncExecution () |
| { |
| return m_async_execution; |
| } |
| |
| void |
| Debugger::SetAsyncExecution (bool async_execution) |
| { |
| static bool value_has_been_set = false; |
| |
| if (!value_has_been_set) |
| { |
| value_has_been_set = true; |
| m_async_execution = async_execution; |
| m_command_interpreter.SetSynchronous (!async_execution); |
| } |
| } |
| |
| void |
| Debugger::DisconnectInput() |
| { |
| m_input_comm.Clear (); |
| } |
| |
| void |
| Debugger::SetInputFileHandle (FILE *fh, bool tranfer_ownership) |
| { |
| m_input_file.SetFileHandle (fh, tranfer_ownership); |
| if (m_input_file.GetFileHandle() == NULL) |
| m_input_file.SetFileHandle (stdin, false); |
| |
| // Disconnect from any old connection if we had one |
| m_input_comm.Disconnect (); |
| m_input_comm.SetConnection (new ConnectionFileDescriptor (::fileno (GetInputFileHandle()), true)); |
| m_input_comm.SetReadThreadBytesReceivedCallback (Debugger::DispatchInputCallback, this); |
| |
| Error error; |
| if (m_input_comm.StartReadThread (&error) == false) |
| { |
| FILE *err_fh = GetErrorFileHandle(); |
| if (err_fh) |
| { |
| ::fprintf (err_fh, "error: failed to main input read thread: %s", error.AsCString() ? error.AsCString() : "unkown error"); |
| exit(1); |
| } |
| } |
| |
| } |
| |
| FILE * |
| Debugger::GetInputFileHandle () |
| { |
| return m_input_file.GetFileHandle(); |
| } |
| |
| |
| void |
| Debugger::SetOutputFileHandle (FILE *fh, bool tranfer_ownership) |
| { |
| m_output_file.SetFileHandle (fh, tranfer_ownership); |
| if (m_output_file.GetFileHandle() == NULL) |
| m_output_file.SetFileHandle (stdin, false); |
| } |
| |
| FILE * |
| Debugger::GetOutputFileHandle () |
| { |
| return m_output_file.GetFileHandle(); |
| } |
| |
| void |
| Debugger::SetErrorFileHandle (FILE *fh, bool tranfer_ownership) |
| { |
| m_error_file.SetFileHandle (fh, tranfer_ownership); |
| if (m_error_file.GetFileHandle() == NULL) |
| m_error_file.SetFileHandle (stdin, false); |
| } |
| |
| |
| FILE * |
| Debugger::GetErrorFileHandle () |
| { |
| return m_error_file.GetFileHandle(); |
| } |
| |
| CommandInterpreter & |
| Debugger::GetCommandInterpreter () |
| { |
| return m_command_interpreter; |
| } |
| |
| Listener & |
| Debugger::GetListener () |
| { |
| return m_listener; |
| } |
| |
| |
| TargetSP |
| Debugger::GetCurrentTarget () |
| { |
| return m_target_list.GetCurrentTarget (); |
| } |
| |
| ExecutionContext |
| Debugger::GetCurrentExecutionContext () |
| { |
| ExecutionContext exe_ctx; |
| exe_ctx.Clear(); |
| |
| lldb::TargetSP target_sp = GetCurrentTarget(); |
| exe_ctx.target = target_sp.get(); |
| |
| if (target_sp) |
| { |
| exe_ctx.process = target_sp->GetProcessSP().get(); |
| if (exe_ctx.process && exe_ctx.process->IsRunning() == false) |
| { |
| exe_ctx.thread = exe_ctx.process->GetThreadList().GetCurrentThread().get(); |
| if (exe_ctx.thread == NULL) |
| exe_ctx.thread = exe_ctx.process->GetThreadList().GetThreadAtIndex(0).get(); |
| if (exe_ctx.thread) |
| { |
| exe_ctx.frame = exe_ctx.thread->GetCurrentFrame().get(); |
| if (exe_ctx.frame == NULL) |
| exe_ctx.frame = exe_ctx.thread->GetStackFrameAtIndex (0).get(); |
| } |
| } |
| } |
| return exe_ctx; |
| |
| } |
| |
| SourceManager & |
| Debugger::GetSourceManager () |
| { |
| return m_source_manager; |
| } |
| |
| |
| TargetList& |
| Debugger::GetTargetList () |
| { |
| return m_target_list; |
| } |
| |
| void |
| Debugger::DispatchInputCallback (void *baton, const void *bytes, size_t bytes_len) |
| { |
| ((Debugger *)baton)->DispatchInput ((char *)bytes, bytes_len); |
| } |
| |
| |
| void |
| Debugger::DispatchInput (const char *bytes, size_t bytes_len) |
| { |
| if (bytes == NULL || bytes_len == 0) |
| return; |
| |
| // TODO: implement the STDIO to the process as an input reader... |
| TargetSP target = GetCurrentTarget(); |
| if (target.get() != NULL) |
| { |
| ProcessSP process_sp = target->GetProcessSP(); |
| if (process_sp.get() != NULL |
| && StateIsRunningState (process_sp->GetState())) |
| { |
| Error error; |
| if (process_sp->PutSTDIN (bytes, bytes_len, error) == bytes_len) |
| return; |
| } |
| } |
| |
| WriteToDefaultReader (bytes, bytes_len); |
| } |
| |
| void |
| Debugger::WriteToDefaultReader (const char *bytes, size_t bytes_len) |
| { |
| if (bytes && bytes_len) |
| m_input_reader_data.append (bytes, bytes_len); |
| |
| if (m_input_reader_data.empty()) |
| return; |
| |
| while (!m_input_readers.empty() && !m_input_reader_data.empty()) |
| { |
| while (CheckIfTopInputReaderIsDone ()) |
| /* Do nothing. */; |
| |
| // Get the input reader from the top of the stack |
| InputReaderSP reader_sp(m_input_readers.top()); |
| |
| if (!reader_sp) |
| break; |
| |
| size_t bytes_handled = reader_sp->HandleRawBytes (m_input_reader_data.data(), |
| m_input_reader_data.size()); |
| if (bytes_handled) |
| { |
| m_input_reader_data.erase (0, bytes_handled); |
| } |
| else |
| { |
| // No bytes were handled, we might not have reached our |
| // granularity, just return and wait for more data |
| break; |
| } |
| } |
| |
| // Flush out any input readers that are donesvn |
| while (CheckIfTopInputReaderIsDone ()) |
| /* Do nothing. */; |
| |
| } |
| |
| void |
| Debugger::PushInputReader (const InputReaderSP& reader_sp) |
| { |
| if (!reader_sp) |
| return; |
| if (!m_input_readers.empty()) |
| { |
| // Deactivate the old top reader |
| InputReaderSP top_reader_sp (m_input_readers.top()); |
| if (top_reader_sp) |
| top_reader_sp->Notify (eInputReaderDeactivate); |
| } |
| m_input_readers.push (reader_sp); |
| reader_sp->Notify (eInputReaderActivate); |
| ActivateInputReader (reader_sp); |
| } |
| |
| bool |
| Debugger::PopInputReader (const lldb::InputReaderSP& pop_reader_sp) |
| { |
| bool result = false; |
| |
| // The reader on the stop of the stack is done, so let the next |
| // read on the stack referesh its prompt and if there is one... |
| if (!m_input_readers.empty()) |
| { |
| InputReaderSP reader_sp(m_input_readers.top()); |
| |
| if (!pop_reader_sp || pop_reader_sp.get() == reader_sp.get()) |
| { |
| m_input_readers.pop (); |
| reader_sp->Notify (eInputReaderDeactivate); |
| reader_sp->Notify (eInputReaderDone); |
| result = true; |
| |
| if (!m_input_readers.empty()) |
| { |
| reader_sp = m_input_readers.top(); |
| if (reader_sp) |
| { |
| ActivateInputReader (reader_sp); |
| reader_sp->Notify (eInputReaderReactivate); |
| } |
| } |
| } |
| } |
| return result; |
| } |
| |
| bool |
| Debugger::CheckIfTopInputReaderIsDone () |
| { |
| bool result = false; |
| if (!m_input_readers.empty()) |
| { |
| InputReaderSP reader_sp(m_input_readers.top()); |
| |
| if (reader_sp && reader_sp->IsDone()) |
| { |
| result = true; |
| PopInputReader (reader_sp); |
| } |
| } |
| return result; |
| } |
| |
| void |
| Debugger::ActivateInputReader (const InputReaderSP &reader_sp) |
| { |
| FILE *in_fh = GetInputFileHandle(); |
| |
| if (in_fh) |
| { |
| struct termios in_fh_termios; |
| int in_fd = fileno (in_fh); |
| if (::tcgetattr(in_fd, &in_fh_termios) == 0) |
| { |
| if (reader_sp->GetEcho()) |
| in_fh_termios.c_lflag |= ECHO; // Turn on echoing |
| else |
| in_fh_termios.c_lflag &= ~ECHO; // Turn off echoing |
| |
| switch (reader_sp->GetGranularity()) |
| { |
| case eInputReaderGranularityByte: |
| case eInputReaderGranularityWord: |
| in_fh_termios.c_lflag &= ~ICANON; // Get one char at a time |
| break; |
| |
| case eInputReaderGranularityLine: |
| case eInputReaderGranularityAll: |
| in_fh_termios.c_lflag |= ICANON; // Get lines at a time |
| break; |
| |
| default: |
| break; |
| } |
| ::tcsetattr (in_fd, TCSANOW, &in_fh_termios); |
| } |
| } |
| } |