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mirror of https://github.com/RPCS3/llvm.git synced 2024-12-14 15:39:06 +00:00
llvm/tools/llvm-db/Commands.cpp
Chris Lattner 252ad03d7d Change Path::getStatusInfo to return a boolean and error string on an error
instead of throwing an exception.  This reduces the amount of code that is
exposed to exceptions (e.g. FileUtilities), though it is clearly only one step
along the way.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@29395 91177308-0d34-0410-b5e6-96231b3b80d8
2006-07-28 22:03:44 +00:00

864 lines
30 KiB
C++

//===-- Commands.cpp - Implement various commands for the CLI -------------===//
//
// The LLVM Compiler Infrastructure
//
// This file was developed by the LLVM research group and is distributed under
// the University of Illinois Open Source License. See LICENSE.TXT for details.
//
//===----------------------------------------------------------------------===//
//
// This file implements many builtin user commands.
//
//===----------------------------------------------------------------------===//
#include "CLIDebugger.h"
#include "CLICommand.h"
#include "llvm/Debugger/ProgramInfo.h"
#include "llvm/Debugger/RuntimeInfo.h"
#include "llvm/Debugger/SourceLanguage.h"
#include "llvm/Debugger/SourceFile.h"
#include "llvm/Debugger/InferiorProcess.h"
#include "llvm/Support/FileUtilities.h"
#include "llvm/ADT/StringExtras.h"
#include <iostream>
using namespace llvm;
/// 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 &CLIDebugger::getCurrentLanguage() const {
// If the user explicitly switched languages with 'set language', use what
// they asked for.
if (CurrentLanguage) {
return *CurrentLanguage;
} else if (Dbg.isProgramRunning()) {
// Otherwise, if the program is running, infer the current language from it.
const GlobalVariable *FuncDesc =
getRuntimeInfo().getCurrentFrame().getFunctionDesc();
return getProgramInfo().getFunction(FuncDesc).getSourceFile().getLanguage();
} else {
// Otherwise, default to C like GDB apparently does.
return SourceLanguage::getCFamilyInstance();
}
}
/// startProgramRunning - If the program has been updated, reload it, then
/// start executing the program.
void CLIDebugger::startProgramRunning() {
eliminateRunInfo();
// If the program has been modified, reload it!
sys::Path Program(Dbg.getProgramPath());
sys::FileStatus Status;
std::string Err;
if (Program.getFileStatus(Status, &Err))
throw Err;
if (TheProgramInfo->getProgramTimeStamp() != Status.getTimestamp()) {
std::cout << "'" << Program << "' has changed; re-reading program.\n";
// Unload an existing program. This kills the program if necessary.
Dbg.unloadProgram();
delete TheProgramInfo;
TheProgramInfo = 0;
CurrentFile = 0;
Dbg.loadProgram(Program.toString());
TheProgramInfo = new ProgramInfo(Dbg.getProgram());
}
std::cout << "Starting program: " << Dbg.getProgramPath() << "\n";
Dbg.createProgram();
// There was no current frame.
LastCurrentFrame = 0;
}
/// 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 CLIDebugger::printSourceLine(unsigned LineNo) {
assert(CurrentFile && "There is no current source file to print!");
const char *LineStart, *LineEnd;
CurrentFile->getSourceLine(LineNo-1, LineStart, LineEnd);
if (LineStart == 0) return true;
std::cout << LineNo;
// If this is the line the program is currently stopped at, print a marker.
if (Dbg.isProgramRunning()) {
unsigned CurLineNo, CurColNo;
const SourceFileInfo *CurSFI;
getRuntimeInfo().getCurrentFrame().getSourceLocation(CurLineNo, CurColNo,
CurSFI);
if (CurLineNo == LineNo && CurrentFile == &CurSFI->getSourceText())
std::cout << " ->";
}
std::cout << "\t" << std::string(LineStart, LineEnd) << "\n";
return false;
}
/// printProgramLocation - Print a line of the place where the current stack
/// frame has stopped and the source line it is on.
///
void CLIDebugger::printProgramLocation(bool PrintLocation) {
assert(Dbg.isProgramLoaded() && Dbg.isProgramRunning() &&
"Error program is not loaded and running!");
// Figure out where the program stopped...
StackFrame &SF = getRuntimeInfo().getCurrentFrame();
unsigned LineNo, ColNo;
const SourceFileInfo *FileDesc;
SF.getSourceLocation(LineNo, ColNo, FileDesc);
// If requested, print out some program information about WHERE we are.
if (PrintLocation) {
// FIXME: print the current function arguments
if (const GlobalVariable *FuncDesc = SF.getFunctionDesc())
std::cout << getProgramInfo().getFunction(FuncDesc).getSymbolicName();
else
std::cout << "<unknown function>";
CurrentFile = &FileDesc->getSourceText();
std::cout << " at " << CurrentFile->getFilename() << ":" << LineNo;
if (ColNo) std::cout << ":" << ColNo;
std::cout << "\n";
}
if (printSourceLine(LineNo))
std::cout << "<could not load source file>\n";
else {
LineListedStart = LineNo-ListSize/2+1;
if ((int)LineListedStart < 1) LineListedStart = 1;
LineListedEnd = LineListedStart+1;
}
}
/// eliminateRunInfo - We are about to run the program. Forget any state
/// about how the program used to be stopped.
void CLIDebugger::eliminateRunInfo() {
delete TheRuntimeInfo;
TheRuntimeInfo = 0;
}
/// programStoppedSuccessfully - This method updates internal data
/// structures to reflect the fact that the program just executed a while,
/// and has successfully stopped.
void CLIDebugger::programStoppedSuccessfully() {
assert(TheRuntimeInfo==0 && "Someone forgot to release the old RuntimeInfo!");
TheRuntimeInfo = new RuntimeInfo(TheProgramInfo, Dbg.getRunningProcess());
// FIXME: if there are any breakpoints at the current location, print them as
// well.
// Since the program as successfully stopped, print its location.
void *CurrentFrame = getRuntimeInfo().getCurrentFrame().getFrameID();
printProgramLocation(CurrentFrame != LastCurrentFrame);
LastCurrentFrame = CurrentFrame;
}
/// getUnsignedIntegerOption - Get an unsigned integer number from the Val
/// string. Check to make sure that the string contains an unsigned integer
/// token, and if not, throw an exception. If isOnlyOption is set, also throw
/// an exception if there is extra junk at the end of the string.
static unsigned getUnsignedIntegerOption(const char *Msg, std::string &Val,
bool isOnlyOption = true) {
std::string Tok = getToken(Val);
if (Tok.empty() || (isOnlyOption && !getToken(Val).empty()))
throw std::string(Msg) + " expects an unsigned integer argument.";
char *EndPtr;
unsigned Result = strtoul(Tok.c_str(), &EndPtr, 0);
if (EndPtr != Tok.c_str()+Tok.size())
throw std::string(Msg) + " expects an unsigned integer argument.";
return Result;
}
/// getOptionalUnsignedIntegerOption - This method is just like
/// getUnsignedIntegerOption, but if the argument value is not specified, a
/// default is returned instead of causing an error.
static unsigned
getOptionalUnsignedIntegerOption(const char *Msg, unsigned Default,
std::string &Val, bool isOnlyOption = true) {
// Check to see if the value was specified...
std::string TokVal = getToken(Val);
if (TokVal.empty()) return Default;
// If it was specified, add it back to the value we are parsing...
Val = TokVal+Val;
// And parse normally.
return getUnsignedIntegerOption(Msg, Val, isOnlyOption);
}
/// 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 CLIDebugger::parseProgramOptions(std::string &Options) {
// FIXME: tokenizing by whitespace is clearly incorrect. Instead we should
// honor quotes and other things that a shell would. Also in the future we
// should support redirection of standard IO.
std::vector<std::string> Arguments;
for (std::string A = getToken(Options); !A.empty(); A = getToken(Options))
Arguments.push_back(A);
Dbg.setProgramArguments(Arguments.begin(), Arguments.end());
}
//===----------------------------------------------------------------------===//
// Program startup and shutdown options
//===----------------------------------------------------------------------===//
/// file command - If the user specifies an option, search the PATH for the
/// specified program/bytecode file and load it. If the user does not specify
/// an option, unload the current program.
void CLIDebugger::fileCommand(std::string &Options) {
std::string Prog = getToken(Options);
if (!getToken(Options).empty())
throw "file command takes at most one argument.";
// Check to make sure the user knows what they are doing
if (Dbg.isProgramRunning() &&
!askYesNo("A program is already loaded. Kill it?"))
return;
// Unload an existing program. This kills the program if necessary.
eliminateRunInfo();
delete TheProgramInfo;
TheProgramInfo = 0;
Dbg.unloadProgram();
CurrentFile = 0;
// If requested, start the new program.
if (Prog.empty()) {
std::cout << "Unloaded program.\n";
} else {
std::cout << "Loading program... " << std::flush;
Dbg.loadProgram(Prog);
assert(Dbg.isProgramLoaded() &&
"loadProgram succeeded, but not program loaded!");
TheProgramInfo = new ProgramInfo(Dbg.getProgram());
std::cout << "successfully loaded '" << Dbg.getProgramPath() << "'!\n";
}
}
void CLIDebugger::createCommand(std::string &Options) {
if (!getToken(Options).empty())
throw "create command does not take any arguments.";
if (!Dbg.isProgramLoaded()) throw "No program loaded.";
if (Dbg.isProgramRunning() &&
!askYesNo("The program is already running. Restart from the beginning?"))
return;
// Start the program running.
startProgramRunning();
// The program stopped!
programStoppedSuccessfully();
}
void CLIDebugger::killCommand(std::string &Options) {
if (!getToken(Options).empty())
throw "kill command does not take any arguments.";
if (!Dbg.isProgramRunning())
throw "No program is currently being run.";
if (askYesNo("Kill the program being debugged?"))
Dbg.killProgram();
eliminateRunInfo();
}
void CLIDebugger::quitCommand(std::string &Options) {
if (!getToken(Options).empty())
throw "quit command does not take any arguments.";
if (Dbg.isProgramRunning() &&
!askYesNo("The program is running. Exit anyway?"))
return;
// Throw exception to get out of the user-input loop.
throw 0;
}
//===----------------------------------------------------------------------===//
// Program execution commands
//===----------------------------------------------------------------------===//
void CLIDebugger::runCommand(std::string &Options) {
if (!Dbg.isProgramLoaded()) throw "No program loaded.";
if (Dbg.isProgramRunning() &&
!askYesNo("The program is already running. Restart from the beginning?"))
return;
// Parse all of the options to the run command, which specify program
// arguments to run with.
parseProgramOptions(Options);
eliminateRunInfo();
// Start the program running.
startProgramRunning();
// Start the program running...
Options = "";
contCommand(Options);
}
void CLIDebugger::contCommand(std::string &Options) {
if (!getToken(Options).empty()) throw "cont argument not supported yet.";
if (!Dbg.isProgramRunning()) throw "Program is not running.";
eliminateRunInfo();
Dbg.contProgram();
// The program stopped!
programStoppedSuccessfully();
}
void CLIDebugger::stepCommand(std::string &Options) {
if (!Dbg.isProgramRunning()) throw "Program is not running.";
// Figure out how many times to step.
unsigned Amount =
getOptionalUnsignedIntegerOption("'step' command", 1, Options);
eliminateRunInfo();
// Step the specified number of times.
for (; Amount; --Amount)
Dbg.stepProgram();
// The program stopped!
programStoppedSuccessfully();
}
void CLIDebugger::nextCommand(std::string &Options) {
if (!Dbg.isProgramRunning()) throw "Program is not running.";
unsigned Amount =
getOptionalUnsignedIntegerOption("'next' command", 1, Options);
eliminateRunInfo();
for (; Amount; --Amount)
Dbg.nextProgram();
// The program stopped!
programStoppedSuccessfully();
}
void CLIDebugger::finishCommand(std::string &Options) {
if (!getToken(Options).empty())
throw "finish command does not take any arguments.";
if (!Dbg.isProgramRunning()) throw "Program is not running.";
// Figure out where we are exactly. If the user requests that we return from
// a frame that is not the top frame, make sure we get it.
void *CurrentFrame = getRuntimeInfo().getCurrentFrame().getFrameID();
eliminateRunInfo();
Dbg.finishProgram(CurrentFrame);
// The program stopped!
programStoppedSuccessfully();
}
//===----------------------------------------------------------------------===//
// Stack frame commands
//===----------------------------------------------------------------------===//
void CLIDebugger::backtraceCommand(std::string &Options) {
// Accepts "full", n, -n
if (!getToken(Options).empty())
throw "FIXME: bt command argument not implemented yet!";
RuntimeInfo &RI = getRuntimeInfo();
ProgramInfo &PI = getProgramInfo();
try {
for (unsigned i = 0; ; ++i) {
StackFrame &SF = RI.getStackFrame(i);
std::cout << "#" << i;
if (i == RI.getCurrentFrameIdx())
std::cout << " ->";
std::cout << "\t" << SF.getFrameID() << " in ";
if (const GlobalVariable *G = SF.getFunctionDesc())
std::cout << PI.getFunction(G).getSymbolicName();
unsigned LineNo, ColNo;
const SourceFileInfo *SFI;
SF.getSourceLocation(LineNo, ColNo, SFI);
if (!SFI->getBaseName().empty()) {
std::cout << " at " << SFI->getBaseName();
if (LineNo) {
std::cout << ":" << LineNo;
if (ColNo)
std::cout << ":" << ColNo;
}
}
// FIXME: when we support shared libraries, we should print ' from foo.so'
// if the stack frame is from a different object than the current one.
std::cout << "\n";
}
} catch (...) {
// Stop automatically when we run off the bottom of the stack.
}
}
void CLIDebugger::upCommand(std::string &Options) {
unsigned Num =
getOptionalUnsignedIntegerOption("'up' command", 1, Options);
RuntimeInfo &RI = getRuntimeInfo();
unsigned CurFrame = RI.getCurrentFrameIdx();
// Check to see if we go can up the specified number of frames.
try {
RI.getStackFrame(CurFrame+Num);
} catch (...) {
if (Num == 1)
throw "Initial frame selected; you cannot go up.";
else
throw "Cannot go up " + utostr(Num) + " frames!";
}
RI.setCurrentFrameIdx(CurFrame+Num);
printProgramLocation();
}
void CLIDebugger::downCommand(std::string &Options) {
unsigned Num =
getOptionalUnsignedIntegerOption("'down' command", 1, Options);
RuntimeInfo &RI = getRuntimeInfo();
unsigned CurFrame = RI.getCurrentFrameIdx();
// Check to see if we can go up the specified number of frames.
if (CurFrame < Num)
if (Num == 1)
throw "Bottom (i.e., innermost) frame selected; you cannot go down.";
else
throw "Cannot go down " + utostr(Num) + " frames!";
RI.setCurrentFrameIdx(CurFrame-Num);
printProgramLocation();
}
void CLIDebugger::frameCommand(std::string &Options) {
RuntimeInfo &RI = getRuntimeInfo();
unsigned CurFrame = RI.getCurrentFrameIdx();
unsigned Num =
getOptionalUnsignedIntegerOption("'frame' command", CurFrame, Options);
// Check to see if we go to the specified frame.
RI.getStackFrame(Num);
RI.setCurrentFrameIdx(Num);
printProgramLocation();
}
//===----------------------------------------------------------------------===//
// Breakpoint related commands
//===----------------------------------------------------------------------===//
void CLIDebugger::breakCommand(std::string &Options) {
// Figure out where the user wants a breakpoint.
const SourceFile *File;
unsigned LineNo;
// Check to see if the user specified a line specifier.
std::string Option = getToken(Options); // strip whitespace
if (!Option.empty()) {
Options = Option + Options; // reconstruct string
// Parse the line specifier.
parseLineSpec(Options, File, LineNo);
} else {
// Build a line specifier for the current stack frame.
throw "FIXME: breaking at the current location is not implemented yet!";
}
if (!File) File = CurrentFile;
if (File == 0)
throw "Unknown file to place breakpoint!";
std::cerr << "Break: " << File->getFilename() << ":" << LineNo << "\n";
throw "breakpoints not implemented yet!";
}
//===----------------------------------------------------------------------===//
// Miscellaneous commands
//===----------------------------------------------------------------------===//
void CLIDebugger::infoCommand(std::string &Options) {
std::string What = getToken(Options);
if (What.empty() || !getToken(Options).empty()){
std::string infoStr("info");
helpCommand(infoStr);
return;
}
if (What == "frame") {
} else if (What == "functions") {
const std::map<const GlobalVariable*, SourceFunctionInfo*> &Functions
= getProgramInfo().getSourceFunctions();
std::cout << "All defined functions:\n";
// FIXME: GDB groups these by source file. We could do that I guess.
for (std::map<const GlobalVariable*, SourceFunctionInfo*>::const_iterator
I = Functions.begin(), E = Functions.end(); I != E; ++I) {
std::cout << I->second->getSymbolicName() << "\n";
}
} else if (What == "source") {
if (CurrentFile == 0)
throw "No current source file.";
// Get the SourceFile information for the current file.
const SourceFileInfo &SF =
getProgramInfo().getSourceFile(CurrentFile->getDescriptor());
std::cout << "Current source file is: " << SF.getBaseName() << "\n"
<< "Compilation directory is: " << SF.getDirectory() << "\n";
if (unsigned NL = CurrentFile->getNumLines())
std::cout << "Located in: " << CurrentFile->getFilename() << "\n"
<< "Contains " << NL << " lines\n";
else
std::cout << "Could not find source file.\n";
std::cout << "Source language is "
<< SF.getLanguage().getSourceLanguageName() << "\n";
} else if (What == "sources") {
const std::map<const GlobalVariable*, SourceFileInfo*> &SourceFiles =
getProgramInfo().getSourceFiles();
std::cout << "Source files for the program:\n";
for (std::map<const GlobalVariable*, SourceFileInfo*>::const_iterator I =
SourceFiles.begin(), E = SourceFiles.end(); I != E;) {
std::cout << I->second->getDirectory() << "/"
<< I->second->getBaseName();
++I;
if (I != E) std::cout << ", ";
}
std::cout << "\n";
} else if (What == "target") {
std::cout << Dbg.getRunningProcess().getStatus();
} else {
// See if this is something handled by the current language.
if (getCurrentLanguage().printInfo(What))
return;
throw "Unknown info command '" + What + "'. Try 'help info'.";
}
}
/// 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 CLIDebugger::parseLineSpec(std::string &LineSpec,
const SourceFile *&SourceFile,
unsigned &LineNo) {
SourceFile = 0;
LineNo = 0;
// First, check to see if we have a : separator.
std::string FirstPart = getToken(LineSpec, ":");
std::string SecondPart = getToken(LineSpec, ":");
if (!getToken(LineSpec).empty()) throw "Malformed line specification!";
// If there is no second part, we must have either "function", "number",
// "+offset", or "-offset".
if (SecondPart.empty()) {
if (FirstPart.empty()) throw "Malformed line specification!";
if (FirstPart[0] == '+') {
FirstPart.erase(FirstPart.begin(), FirstPart.begin()+1);
// For +n, return LineListedEnd+n
LineNo = LineListedEnd +
getUnsignedIntegerOption("Line specifier '+'", FirstPart);
} else if (FirstPart[0] == '-') {
FirstPart.erase(FirstPart.begin(), FirstPart.begin()+1);
// For -n, return LineListedEnd-n
LineNo = LineListedEnd -
getUnsignedIntegerOption("Line specifier '-'", FirstPart);
if ((int)LineNo < 1) LineNo = 1;
} else if (FirstPart[0] == '*') {
throw "Address expressions not supported as source locations!";
} else {
// Ok, check to see if this is just a line number.
std::string Saved = FirstPart;
try {
LineNo = getUnsignedIntegerOption("", Saved);
} catch (...) {
// Ok, it's not a valid line number. It must be a source-language
// entity name.
std::string Name = getToken(FirstPart);
if (!getToken(FirstPart).empty())
throw "Extra junk in line specifier after '" + Name + "'.";
SourceFunctionInfo *SFI =
getCurrentLanguage().lookupFunction(Name, getProgramInfo(),
TheRuntimeInfo);
if (SFI == 0)
throw "Unknown identifier '" + Name + "'.";
unsigned L, C;
SFI->getSourceLocation(L, C);
if (L == 0) throw "Could not locate '" + Name + "'!";
LineNo = L;
SourceFile = &SFI->getSourceFile().getSourceText();
return;
}
}
} else {
// Ok, this must be a filename qualified line number or function name.
// First, figure out the source filename.
std::string SourceFilename = getToken(FirstPart);
if (!getToken(FirstPart).empty())
throw "Invalid filename qualified source location!";
// Next, check to see if this is just a line number.
std::string Saved = SecondPart;
try {
LineNo = getUnsignedIntegerOption("", Saved);
} catch (...) {
// Ok, it's not a valid line number. It must be a function name.
throw "FIXME: Filename qualified function names are not support "
"as line specifiers yet!";
}
// Ok, we got the line number. Now check out the source file name to make
// sure it's all good. If it is, return it. If not, throw exception.
SourceFile =&getProgramInfo().getSourceFile(SourceFilename).getSourceText();
}
}
void CLIDebugger::listCommand(std::string &Options) {
if (!Dbg.isProgramLoaded())
throw "No program is loaded. Use the 'file' command.";
// Handle "list foo," correctly, by returning " " as the second token
Options += " ";
std::string FirstLineSpec = getToken(Options, ",");
std::string SecondLineSpec = getToken(Options, ",");
if (!getToken(Options, ",").empty())
throw "list command only expects two source location specifiers!";
// StartLine, EndLine - The starting and ending line numbers to print.
unsigned StartLine = 0, EndLine = 0;
if (SecondLineSpec.empty()) { // No second line specifier provided?
// Handle special forms like "", "+", "-", etc.
std::string TmpSpec = FirstLineSpec;
std::string Tok = getToken(TmpSpec);
if (getToken(TmpSpec).empty() && (Tok == "" || Tok == "+" || Tok == "-")) {
if (Tok == "+" || Tok == "") {
StartLine = LineListedEnd;
EndLine = StartLine + ListSize;
} else {
assert(Tok == "-");
StartLine = LineListedStart-ListSize;
EndLine = LineListedStart;
if ((int)StartLine <= 0) StartLine = 1;
}
} else {
// Must be a normal line specifier.
const SourceFile *File;
unsigned LineNo;
parseLineSpec(FirstLineSpec, File, LineNo);
// If the user only specified one file specifier, we should display
// ListSize lines centered at the specified line.
if (File != 0) CurrentFile = File;
StartLine = LineNo - (ListSize+1)/2;
if ((int)StartLine <= 0) StartLine = 1;
EndLine = StartLine + ListSize;
}
} else {
// Parse two line specifiers...
const SourceFile *StartFile, *EndFile;
unsigned StartLineNo, EndLineNo;
parseLineSpec(FirstLineSpec, StartFile, StartLineNo);
unsigned SavedLLE = LineListedEnd;
LineListedEnd = StartLineNo;
try {
parseLineSpec(SecondLineSpec, EndFile, EndLineNo);
} catch (...) {
LineListedEnd = SavedLLE;
throw;
}
// Inherit file specified by the first line spec if there was one.
if (EndFile == 0) EndFile = StartFile;
if (StartFile != EndFile)
throw "Start and end line specifiers are in different files!";
CurrentFile = StartFile;
StartLine = StartLineNo;
EndLine = EndLineNo+1;
}
assert((int)StartLine > 0 && (int)EndLine > 0 && StartLine <= EndLine &&
"Error reading line specifiers!");
// If there was no current file, and the user didn't specify one to list, we
// have an error.
if (CurrentFile == 0)
throw "There is no current file to list.";
// Remember for next time.
LineListedStart = StartLine;
LineListedEnd = StartLine;
for (unsigned LineNo = StartLine; LineNo != EndLine; ++LineNo) {
// Print the source line, unless it is invalid.
if (printSourceLine(LineNo))
break;
LineListedEnd = LineNo+1;
}
// If we didn't print any lines, find out why.
if (LineListedEnd == StartLine) {
// See if we can read line #0 from the file, if not, we couldn't load the
// file.
const char *LineStart, *LineEnd;
CurrentFile->getSourceLine(0, LineStart, LineEnd);
if (LineStart == 0)
throw "Could not load source file '" + CurrentFile->getFilename() + "'!";
else
std::cout << "<end of file>\n";
}
}
void CLIDebugger::setCommand(std::string &Options) {
std::string What = getToken(Options);
if (What.empty())
throw "set command expects at least two arguments.";
if (What == "args") {
parseProgramOptions(Options);
} else if (What == "language") {
std::string Lang = getToken(Options);
if (!getToken(Options).empty())
throw "set language expects one argument at most.";
if (Lang == "") {
std::cout << "The currently understood settings are:\n\n"
<< "local or auto Automatic setting based on source file\n"
<< "c Use the C language\n"
<< "c++ Use the C++ language\n"
<< "unknown Use when source language is not supported\n";
} else if (Lang == "local" || Lang == "auto") {
CurrentLanguage = 0;
} else if (Lang == "c") {
CurrentLanguage = &SourceLanguage::getCFamilyInstance();
} else if (Lang == "c++") {
CurrentLanguage = &SourceLanguage::getCPlusPlusInstance();
} else if (Lang == "unknown") {
CurrentLanguage = &SourceLanguage::getUnknownLanguageInstance();
} else {
throw "Unknown language '" + Lang + "'.";
}
} else if (What == "listsize") {
ListSize = getUnsignedIntegerOption("'set prompt' command", Options);
} else if (What == "prompt") {
// Include any trailing whitespace or other tokens, but not leading
// whitespace.
Prompt = getToken(Options); // Strip leading whitespace
Prompt += Options; // Keep trailing whitespace or other stuff
} else {
// FIXME: Try to parse this as a source-language program expression.
throw "Don't know how to set '" + What + "'!";
}
}
void CLIDebugger::showCommand(std::string &Options) {
std::string What = getToken(Options);
if (What.empty() || !getToken(Options).empty())
throw "show command expects one argument.";
if (What == "args") {
std::cout << "Argument list to give program when started is \"";
// FIXME: This doesn't print stuff correctly if the arguments have spaces in
// them, but currently the only way to get that is to use the --args command
// line argument. This should really handle escaping all hard characters as
// needed.
for (unsigned i = 0, e = Dbg.getNumProgramArguments(); i != e; ++i)
std::cout << (i ? " " : "") << Dbg.getProgramArgument(i);
std::cout << "\"\n";
} else if (What == "language") {
std::cout << "The current source language is '";
if (CurrentLanguage)
std::cout << CurrentLanguage->getSourceLanguageName();
else
std::cout << "auto; currently "
<< getCurrentLanguage().getSourceLanguageName();
std::cout << "'.\n";
} else if (What == "listsize") {
std::cout << "Number of source lines llvm-db will list by default is "
<< ListSize << ".\n";
} else if (What == "prompt") {
std::cout << "llvm-db's prompt is \"" << Prompt << "\".\n";
} else {
throw "Unknown show command '" + What + "'. Try 'help show'.";
}
}
void CLIDebugger::helpCommand(std::string &Options) {
// Print out all of the commands in the CommandTable
std::string Command = getToken(Options);
if (!getToken(Options).empty())
throw "help command takes at most one argument.";
// Getting detailed help on a particular command?
if (!Command.empty()) {
CLICommand *C = getCommand(Command);
std::cout << C->getShortHelp() << ".\n" << C->getLongHelp();
// If there are aliases for this option, print them out.
const std::vector<std::string> &Names = C->getOptionNames();
if (Names.size() > 1) {
std::cout << "The '" << Command << "' command is known as: '"
<< Names[0] << "'";
for (unsigned i = 1, e = Names.size(); i != e; ++i)
std::cout << ", '" << Names[i] << "'";
std::cout << "\n";
}
} else {
unsigned MaxSize = 0;
for (std::map<std::string, CLICommand*>::iterator I = CommandTable.begin(),
E = CommandTable.end(); I != E; ++I)
if (I->first.size() > MaxSize &&
I->first == I->second->getPrimaryOptionName())
MaxSize = I->first.size();
// Loop over all of the commands, printing the short help version
for (std::map<std::string, CLICommand*>::iterator I = CommandTable.begin(),
E = CommandTable.end(); I != E; ++I)
if (I->first == I->second->getPrimaryOptionName())
std::cout << I->first << std::string(MaxSize - I->first.size(), ' ')
<< " - " << I->second->getShortHelp() << "\n";
}
}