forked from OSchip/llvm-project
450 lines
14 KiB
C++
450 lines
14 KiB
C++
//===-- MIUtilStreamStdin.cpp -----------------------------------*- C++ -*-===//
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//
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// The LLVM Compiler Infrastructure
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//
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// This file is distributed under the University of Illinois Open Source
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// License. See LICENSE.TXT for details.
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//
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//===----------------------------------------------------------------------===//
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//++
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// File: MIUtilStreamStdin.cpp
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//
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// Overview: CMICmnStreamStdin implementation.
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//
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// Environment: Compilers: Visual C++ 12.
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// gcc (Ubuntu/Linaro 4.8.1-10ubuntu9) 4.8.1
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// Libraries: See MIReadmetxt.
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//
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// Copyright: None.
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//--
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// In-house headers:
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#include "MICmnStreamStdin.h"
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#include "MICmnStreamStdout.h"
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#include "MICmnResources.h"
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#include "MICmnLog.h"
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#include "MICmnThreadMgrStd.h"
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#include "MIUtilSingletonHelper.h"
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#include "MIDriver.h"
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#if defined(_MSC_VER)
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#include "MIUtilSystemWindows.h"
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#include "MICmnStreamStdinWindows.h"
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#else
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#include "MICmnStreamStdinLinux.h"
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#endif // defined( _MSC_VER )
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//++ ------------------------------------------------------------------------------------
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// Details: CMICmnStreamStdin constructor.
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// Type: Method.
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// Args: None.
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// Return: None.
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// Throws: None.
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//--
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CMICmnStreamStdin::CMICmnStreamStdin(void)
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: m_constStrThisThreadname("MI stdin thread")
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, m_pVisitor(nullptr)
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, m_strPromptCurrent("(gdb)")
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, m_bKeyCtrlCHit(false)
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, m_bShowPrompt(false)
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, m_bRedrawPrompt(true)
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, m_pStdinReadHandler(nullptr)
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{
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}
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//++ ------------------------------------------------------------------------------------
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// Details: CMICmnStreamStdin destructor.
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// Type: Overridable.
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// Args: None.
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// Return: None.
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// Throws: None.
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//--
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CMICmnStreamStdin::~CMICmnStreamStdin(void)
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{
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Shutdown();
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}
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//++ ------------------------------------------------------------------------------------
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// Details: Initialize resources for *this Stdin stream.
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// Type: Method.
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// Args: None.
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// Return: MIstatus::success - Functional succeeded.
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// MIstatus::failure - Functional failed.
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// Throws: None.
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//--
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bool
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CMICmnStreamStdin::Initialize(void)
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{
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m_clientUsageRefCnt++;
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if (m_bInitialized)
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return MIstatus::success;
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bool bOk = MIstatus::success;
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CMIUtilString errMsg;
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// Note initialisation order is important here as some resources depend on previous
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MI::ModuleInit<CMICmnLog>(IDS_MI_INIT_ERR_LOG, bOk, errMsg);
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MI::ModuleInit<CMICmnResources>(IDS_MI_INIT_ERR_RESOURCES, bOk, errMsg);
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MI::ModuleInit<CMICmnThreadMgrStd>(IDS_MI_INIT_ERR_THREADMGR, bOk, errMsg);
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#ifdef _MSC_VER
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MI::ModuleInit<CMICmnStreamStdinWindows>(IDS_MI_INIT_ERR_OS_STDIN_HANDLER, bOk, errMsg);
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bOk = bOk && SetOSStdinHandler(CMICmnStreamStdinWindows::Instance());
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#else
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MI::ModuleInit<CMICmnStreamStdinLinux>(IDS_MI_INIT_ERR_OS_STDIN_HANDLER, bOk, errMsg);
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bOk = bOk && SetOSStdinHandler(CMICmnStreamStdinLinux::Instance());
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#endif // ( _MSC_VER )
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// The OS specific stdin stream handler must be set before *this class initialises
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if (bOk && m_pStdinReadHandler == nullptr)
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{
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CMIUtilString strInitError(CMIUtilString::Format(MIRSRC(IDS_MI_INIT_ERR_STREAMSTDIN_OSHANDLER), errMsg.c_str()));
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SetErrorDescription(strInitError);
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return MIstatus::failure;
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}
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// Other resources required
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if (bOk)
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{
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m_bKeyCtrlCHit = false; // Reset
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}
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m_bInitialized = bOk;
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if (!bOk)
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{
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CMIUtilString strInitError(CMIUtilString::Format(MIRSRC(IDS_MI_INIT_ERR_STREAMSTDIN), errMsg.c_str()));
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SetErrorDescription(strInitError);
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return MIstatus::failure;
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}
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return MIstatus::success;
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}
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//++ ------------------------------------------------------------------------------------
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// Details: Release resources for *this Stdin stream.
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// Type: Method.
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// Args: None.
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// Return: MIstatus::success - Functional succeeded.
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// MIstatus::failure - Functional failed.
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// Throws: None.
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//--
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bool
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CMICmnStreamStdin::Shutdown(void)
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{
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if (--m_clientUsageRefCnt > 0)
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return MIstatus::success;
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if (!m_bInitialized)
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return MIstatus::success;
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m_bInitialized = false;
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ClrErrorDescription();
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bool bOk = MIstatus::success;
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CMIUtilString errMsg;
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m_pVisitor = nullptr;
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m_bKeyCtrlCHit = false;
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// Note shutdown order is important here
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#ifndef _MSC_VER
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MI::ModuleShutdown<CMICmnStreamStdinLinux>(IDS_MI_SHTDWN_ERR_OS_STDIN_HANDLER, bOk, errMsg);
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#else
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MI::ModuleShutdown<CMICmnStreamStdinWindows>(IDS_MI_SHTDWN_ERR_OS_STDIN_HANDLER, bOk, errMsg);
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#endif // ( _MSC_VER )
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MI::ModuleShutdown<CMICmnThreadMgrStd>(IDS_MI_SHTDWN_ERR_THREADMGR, bOk, errMsg);
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MI::ModuleShutdown<CMICmnResources>(IDE_MI_SHTDWN_ERR_RESOURCES, bOk, errMsg);
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MI::ModuleShutdown<CMICmnLog>(IDS_MI_SHTDWN_ERR_LOG, bOk, errMsg);
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if (!bOk)
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{
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SetErrorDescriptionn(MIRSRC(IDE_MI_SHTDWN_ERR_STREAMSTDIN), errMsg.c_str());
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}
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return MIstatus::success;
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}
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//++ ------------------------------------------------------------------------------------
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// Details: Validate and set the text that forms the prompt on the command line.
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// Type: Method.
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// Args: vNewPrompt - (R) Text description.
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// Return: MIstatus::success - Functional succeeded.
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// MIstatus::failure - Functional failed.
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// Throws: None.
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//--
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bool
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CMICmnStreamStdin::SetPrompt(const CMIUtilString &vNewPrompt)
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{
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if (vNewPrompt.empty())
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{
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const CMIUtilString msg(CMIUtilString::Format(MIRSRC(IDS_STDIN_ERR_INVALID_PROMPT), vNewPrompt.c_str()));
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CMICmnStreamStdout::Instance().Write(msg);
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return MIstatus::failure;
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}
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m_strPromptCurrent = vNewPrompt;
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return MIstatus::success;
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}
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//++ ------------------------------------------------------------------------------------
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// Details: Retrieve the command line prompt text currently being used.
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// Type: Method.
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// Args: None.
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// Return: const CMIUtilString & - Functional failed.
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// Throws: None.
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//--
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const CMIUtilString &
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CMICmnStreamStdin::GetPrompt(void) const
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{
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return m_strPromptCurrent;
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}
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//++ ------------------------------------------------------------------------------------
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// Details: Wait on input from stream Stdin. On each line of input received it is
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// validated and providing there are no errors on the stream or the input
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// buffer is not exceeded the data is passed to the visitor.
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// Type: Method.
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// Args: vrVisitor - (W) A client deriver callback.
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// Return: MIstatus::success - Functional succeeded.
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// MIstatus::failure - Functional failed.
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// Throws: None.
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//--
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bool
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CMICmnStreamStdin::SetVisitor(IStreamStdin &vrVisitor)
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{
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m_pVisitor = &vrVisitor;
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return MIstatus::success;
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}
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//++ ------------------------------------------------------------------------------------
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// Details: Set whether to display optional command line prompt. The prompt is output to
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// stdout. Disable it when this may interfere with the client reading stdout as
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// input and it tries to interpret the prompt text to.
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// Type: Method.
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// Args: vbYes - (R) True = Yes prompt is shown/output to the user (stdout), false = no prompt.
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// Return: MIstatus::success - Functional succeeded.
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// MIstatus::failure - Functional failed.
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// Throws: None.
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//--
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void
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CMICmnStreamStdin::SetEnablePrompt(const bool vbYes)
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{
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m_bShowPrompt = vbYes;
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}
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//++ ------------------------------------------------------------------------------------
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// Details: Get whether to display optional command line prompt. The prompt is output to
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// stdout. Disable it when this may interfere with the client reading stdout as
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// input and it tries to interpret the prompt text to.
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// Type: Method.
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// Args: None.
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// Return: bool - True = Yes prompt is shown/output to the user (stdout), false = no prompt.
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// Throws: None.
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//--
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bool
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CMICmnStreamStdin::GetEnablePrompt(void) const
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{
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return m_bShowPrompt;
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}
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//++ ------------------------------------------------------------------------------------
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// Details: Determine if stdin has any characters present in its buffer.
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// Type: Method.
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// Args: vwbAvail - (W) True = There is chars available, false = nothing there.
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// Return: MIstatus::success - Functional succeeded.
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// MIstatus::failure - Functional failed.
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// Throws: None.
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//--
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bool
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CMICmnStreamStdin::InputAvailable(bool &vwbAvail)
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{
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return m_pStdinReadHandler->InputAvailable(vwbAvail);
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}
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//++ ------------------------------------------------------------------------------------
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// Details: The monitoring on new line data calls back to the visitor object registered
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// with *this stdin monitoring. The monitoring to stops when the visitor returns
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// true for bYesExit flag. Errors output to log file.
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// This function runs in the thread "MI stdin monitor".
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// Type: Method.
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// vrwbYesAlive - (W) False = yes exit stdin monitoring, true = continue monitor.
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// Return: MIstatus::success - Functional succeeded.
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// MIstatus::failure - Functional failed.
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// Throws: None.
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//--
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bool
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CMICmnStreamStdin::MonitorStdin(bool &vrwbYesAlive)
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{
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if (m_bShowPrompt)
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{
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CMICmnStreamStdout &rStdoutMan = CMICmnStreamStdout::Instance();
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rStdoutMan.WriteMIResponse(m_strPromptCurrent.c_str());
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m_bRedrawPrompt = false;
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}
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// CODETAG_DEBUG_SESSION_RUNNING_PROG_RECEIVED_SIGINT_PAUSE_PROGRAM
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if (m_bKeyCtrlCHit)
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{
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CMIDriver &rMIDriver = CMIDriver::Instance();
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rMIDriver.SetExitApplicationFlag(false);
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if (rMIDriver.GetExitApplicationFlag())
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{
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vrwbYesAlive = false;
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return MIstatus::success;
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}
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// Reset - the MI Driver received SIGINT during a running debug programm session
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m_bKeyCtrlCHit = false;
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}
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#if MICONFIG_POLL_FOR_STD_IN
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bool bAvail = true;
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// Check if there is stdin available
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if (InputAvailable(bAvail))
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{
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// Early exit when there is no input
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if (!bAvail)
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return MIstatus::success;
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}
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else
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{
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vrwbYesAlive = false;
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CMIDriver::Instance().SetExitApplicationFlag(true);
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return MIstatus::failure;
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}
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#endif // MICONFIG_POLL_FOR_STD_IN
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// Read a line from std input
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CMIUtilString stdinErrMsg;
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const MIchar *pText = ReadLine(stdinErrMsg);
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// Did something go wrong
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const bool bHaveError(!stdinErrMsg.empty());
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if ((pText == nullptr) || bHaveError)
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{
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if (bHaveError)
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{
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CMICmnStreamStdout::Instance().Write(stdinErrMsg);
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}
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return MIstatus::failure;
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}
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// We have text so send it off to the visitor
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bool bOk = MIstatus::success;
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if (m_pVisitor != nullptr)
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{
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bool bYesExit = false;
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bOk = m_pVisitor->ReadLine(CMIUtilString(pText), bYesExit);
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m_bRedrawPrompt = true;
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vrwbYesAlive = !bYesExit;
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}
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return bOk;
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}
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//++ ------------------------------------------------------------------------------------
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// Details: Wait on new line of data from stdin stream (completed by '\n' or '\r').
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// Type: Method.
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// Args: vwErrMsg - (W) Empty string ok or error description.
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// Return: MIchar * - text buffer pointer or NULL on failure.
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// Throws: None.
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//--
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const MIchar *
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CMICmnStreamStdin::ReadLine(CMIUtilString &vwErrMsg)
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{
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return m_pStdinReadHandler->ReadLine(vwErrMsg);
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}
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//++ ------------------------------------------------------------------------------------
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// Details: Inform *this stream that the user hit Control-C key to exit.
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// The function is normally called by the SIGINT signal in sigint_handler() to
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// simulate kill app from the client.
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// This function is called by a Kernel thread.
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// Type: Method.
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// Args: None.
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// Return: None.
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// Throws: None.
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//--
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void
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CMICmnStreamStdin::SetCtrlCHit(void)
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{
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CMIUtilThreadLock lock(m_mutex);
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m_bKeyCtrlCHit = true;
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}
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//++ ------------------------------------------------------------------------------------
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// Details: The main worker method for this thread.
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// Type: Overridden.
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// Args: vrbIsAlive - (W) True = *this thread is working, false = thread has exited.
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// Return: MIstatus::success - Functional succeeded.
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// MIstatus::failure - Functional failed.
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// Throws: None.
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//--
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bool
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CMICmnStreamStdin::ThreadRun(bool &vrbIsAlive)
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{
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return MonitorStdin(vrbIsAlive);
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}
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//++ ------------------------------------------------------------------------------------
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// Details: Let this thread clean up after itself.
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// Type: Overridden.
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// Args: None.
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// Return: MIstatus::success - Functional succeeded.
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// MIstatus::failure - Functional failed.
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// Throws: None.
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//--
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bool
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CMICmnStreamStdin::ThreadFinish(void)
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{
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// Do nothing - override to implement
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return MIstatus::success;
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}
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//++ ------------------------------------------------------------------------------------
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// Details: Retrieve *this thread object's name.
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// Type: Overridden.
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// Args: None.
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// Return: CMIUtilString & - Text.
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// Throws: None.
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//--
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const CMIUtilString &
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CMICmnStreamStdin::ThreadGetName(void) const
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{
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return m_constStrThisThreadname;
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}
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//++ ------------------------------------------------------------------------------------
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// Details: Mandatory set the OS specific stream stdin handler. *this class utilises the
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// handler to read data from the stdin stream and put into a queue for the
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// driver to read when able.
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// Type: Method.
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// Args: None.
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// Return: MIstatus::success - Functional succeeded.
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// MIstatus::failure - Functional failed.
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// Throws: None.
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//--
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bool
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CMICmnStreamStdin::SetOSStdinHandler(IOSStdinHandler &vrHandler)
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{
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m_pStdinReadHandler = &vrHandler;
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return MIstatus::success;
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}
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//++ ------------------------------------------------------------------------------------
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// Details: Do some actions before exiting.
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// Type: Method.
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// Args: None.
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// Return: None.
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// Throws: None.
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//--
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void
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CMICmnStreamStdin::OnExitHandler(void)
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{
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m_pStdinReadHandler->InterruptReadLine();
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}
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