Initial checkin of the LLVM Source-Level Debugger. This is incomplete, but
a good start. The status is documented in docs/SourceLevelDebugging.html
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@10687 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/tools/llvm-db/Commands.cpp b/tools/llvm-db/Commands.cpp
new file mode 100644
index 0000000..9d0bcba
--- /dev/null
+++ b/tools/llvm-db/Commands.cpp
@@ -0,0 +1,803 @@
+//===-- 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 "Support/FileUtilities.h"
+#include "Support/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!
+ std::string Program = Dbg.getProgramPath();
+ if (TheProgramInfo->getProgramTimeStamp() != getFileTimestamp(Program)) {
+ 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);
+ 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 << "\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);
+}
+
+
+//===----------------------------------------------------------------------===//
+// 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 << "success loading '" << 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 (!getToken(Options).empty()) throw "run arguments not supported yet.";
+ if (!Dbg.isProgramLoaded()) throw "No program loaded.";
+ if (Dbg.isProgramRunning() &&
+ !askYesNo("The program is already running. Restart from the beginning?"))
+ return;
+
+ 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) {
+ throw "breakpoints not implemented yet!";
+}
+
+//===----------------------------------------------------------------------===//
+// Miscellaneous commands
+//===----------------------------------------------------------------------===//
+
+void CLIDebugger::infoCommand(std::string &Options) {
+ std::string What = getToken(Options);
+
+ if (What.empty() || !getToken(Options).empty())
+ throw "info command expects exactly one argument.";
+
+ 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 == "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 == "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";
+ }
+}