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//===- CLIDebugger.h - LLVM Command Line Interface Debugger -----*- C++ -*-===//
//
// The LLVM Compiler Infrastructure
//
// This file is distributed under the University of Illinois Open Source
// License. See LICENSE.TXT for details.
//
//===----------------------------------------------------------------------===//
//
// This file defines the CLIDebugger class, which implements a command line
// interface to the LLVM Debugger library.
//
//===----------------------------------------------------------------------===//
#ifndef CLIDEBUGGER_H
#define CLIDEBUGGER_H
#include "llvm/Debugger/Debugger.h"
#include <map>
namespace llvm {
class CLICommand;
class SourceFile;
struct SourceLanguage;
class ProgramInfo;
class RuntimeInfo;
class LLVMContext;
/// CLIDebugger - This class implements the command line interface for the
/// LLVM debugger.
class CLIDebugger {
LLVMContext& Context;
/// Dbg - The low-level LLVM debugger object that we use to do our dirty
/// work.
Debugger Dbg;
/// CommandTable - This table contains a mapping from command names to the
/// CLICommand object that implements the command.
std::map<std::string, CLICommand*> CommandTable;
//===------------------------------------------------------------------===//
// Data related to the program that is currently loaded. Note that the Dbg
// variable also captures some information about the loaded program. This
// pointer is non-null iff Dbg.isProgramLoaded() is true.
//
ProgramInfo *TheProgramInfo;
//===------------------------------------------------------------------===//
// Data related to the program that is currently executing, but has stopped.
// Note that the Dbg variable also captures some information about the
// loaded program. This pointer is non-null iff Dbg.isProgramRunning() is
// true.
//
RuntimeInfo *TheRuntimeInfo;
/// LastCurrentFrame - This variable holds the Frame ID of the top-level
/// stack frame from the last time that the program was executed. We keep
/// this because we only want to print the source location when the current
/// function changes.
void *LastCurrentFrame;
//===------------------------------------------------------------------===//
// Data directly exposed through the debugger prompt
//
std::string Prompt; // set prompt, show prompt
unsigned ListSize; // set listsize, show listsize
//===------------------------------------------------------------------===//
// Data to support user interaction
//
/// CurrentFile - The current source file we are inspecting, or null if
/// none.
const SourceFile *CurrentFile;
unsigned LineListedStart, LineListedEnd;
/// CurrentLanguage - This contains the source language in use, if one is
/// explicitly set by the user. If this is null (the default), the language
/// is automatically determined from the current stack frame.
///
const SourceLanguage *CurrentLanguage;
public:
CLIDebugger(LLVMContext& ctxt);
/// getDebugger - Return the current LLVM debugger implementation being
/// used.
Debugger &getDebugger() { return Dbg; }
/// run - Start the debugger, returning when the user exits the debugger.
/// This starts the main event loop of the CLI debugger.
///
int run();
/// addCommand - Add a command to the CommandTable, potentially displacing a
/// preexisting command.
void addCommand(const std::string &Option, CLICommand *Cmd);
/// addSourceDirectory - Add a directory to search when looking for the
/// source code of the program.
void addSourceDirectory(const std::string &Dir) {
// FIXME: implement
}
/// getCurrentLanguage - Return the current source language that the user is
/// playing around with. This is aquired from the current stack frame of a
/// running program if one exists, but this value can be explicitly set by
/// the user as well.
const SourceLanguage &getCurrentLanguage() const;
/// getProgramInfo - Return a reference to the ProgramInfo object for the
/// currently loaded program. If there is no program loaded, throw an
/// exception.
ProgramInfo &getProgramInfo() const {
if (TheProgramInfo == 0)
throw "No program is loaded.";
return *TheProgramInfo;
}
/// getRuntimeInfo - Return a reference to the current RuntimeInfo object.
/// If there is no program running, throw an exception.
RuntimeInfo &getRuntimeInfo() const {
if (TheRuntimeInfo == 0)
throw "No program is running.";
return *TheRuntimeInfo;
}
private: // Internal implementation methods
/// getCommand - This looks up the specified command using a fuzzy match.
/// If the string exactly matches a command or is an unambiguous prefix of a
/// command, it returns the command. Otherwise it throws an exception
/// indicating the possible ambiguous choices.
CLICommand *getCommand(const std::string &Command);
/// askYesNo - Ask the user a question, and demand a yes/no response. If
/// the user says yes, return true.
bool askYesNo(const std::string &Message) const;
/// printProgramLocation - Given a loaded and created child process that has
/// stopped, print its current source location.
void printProgramLocation(bool PrintLocation = true);
/// eliminateRunInfo - We are about to run the program. Forget any state
/// about how the program used to be stopped.
void eliminateRunInfo();
/// programStoppedSuccessfully - This method updates internal data
/// structures to reflect the fact that the program just executed a while,
/// and has successfully stopped.
void programStoppedSuccessfully();
public: /// Builtin debugger commands, invokable by the user
// Program startup and shutdown options
void fileCommand(std::string &Options); // file
void createCommand(std::string &Options); // create
void killCommand(std::string &Options); // kill
void quitCommand(std::string &Options); // quit
// Program execution commands
void runCommand(std::string &Options); // run|r
void contCommand(std::string &Options); // cont|c|fg
void stepCommand(std::string &Options); // step|s [count]
void nextCommand(std::string &Options); // next|n [count]
void finishCommand(std::string &Options); // finish
// Stack frame commands
void backtraceCommand(std::string &Options); // backtrace|bt [count]
void upCommand(std::string &Options); // up
void downCommand(std::string &Options); // down
void frameCommand(std::string &Options); // frame
// Breakpoint related commands
void breakCommand(std::string &Options); // break|b <id>
// Miscellaneous commands
void infoCommand(std::string &Options); // info
void listCommand(std::string &Options); // list
void setCommand(std::string &Options); // set
void showCommand(std::string &Options); // show
void helpCommand(std::string &Options); // help
private:
/// startProgramRunning - If the program has been updated, reload it, then
/// start executing the program.
void startProgramRunning();
/// printSourceLine - Print the specified line of the current source file.
/// If the specified line is invalid (the source file could not be loaded or
/// the line number is out of range), don't print anything, but return true.
bool printSourceLine(unsigned LineNo);
/// parseLineSpec - Parses a line specifier, for use by the 'list' command.
/// If SourceFile is returned as a void pointer, then it was not specified.
/// If the line specifier is invalid, an exception is thrown.
void parseLineSpec(std::string &LineSpec, const SourceFile *&SourceFile,
unsigned &LineNo);
/// parseProgramOptions - This method parses the Options string and loads it
/// as options to be passed to the program. This is used by the run command
/// and by 'set args'.
void parseProgramOptions(std::string &Options);
};
}
#endif
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