tools/llvm-db/llvm-db.cpp

   1 //===- llvm-db.cpp - LLVM Debugger ----------------------------------------===//
   2 //
   3 //                     The LLVM Compiler Infrastructure
   4 //
   5 // This file is distributed under the University of Illinois Open Source
   6 // License. See LICENSE.TXT for details.
   7 //
   8 //===----------------------------------------------------------------------===//
   9 //
  10 // This utility implements a simple text-mode front-end to the LLVM debugger
  11 // library.
  12 //
  13 //===----------------------------------------------------------------------===//
  14
  15 #include "CLIDebugger.h"
  16 #include "llvm/LLVMContext.h"
  17 #include "llvm/Support/CommandLine.h"
  18 #include "llvm/Support/ManagedStatic.h"
  19 #include "llvm/Support/PrettyStackTrace.h"
  20 #include "llvm/Support/raw_ostream.h"
  21 #include "llvm/System/Signals.h"
  22 using namespace llvm;
  23
  24 namespace {
  25   // Command line options for specifying the program to debug and options to use
  26   cl::opt<std::string>
  27   InputFile(cl::desc("<program>"), cl::Positional, cl::init(""));
  28
  29   cl::list<std::string>
  30   InputArgs("args", cl::Positional, cl::desc("<program and arguments>"),
  31             cl::ZeroOrMore);
  32
  33   // Command line options to control various directory related stuff
  34   cl::list<std::string>
  35   SourceDirectories("directory", cl::value_desc("directory"),
  36                     cl::desc("Add directory to the search for source files"));
  37   cl::alias SDA("d", cl::desc("Alias for --directory"),
  38                 cl::aliasopt(SourceDirectories));
  39
  40   cl::opt<std::string>
  41   WorkingDirectory("cd", cl::desc("Use directory as current working directory"),
  42                    cl::value_desc("directory"));
  43
  44   // Command line options specific to the llvm-db debugger driver
  45   cl::opt<bool> Quiet("quiet", cl::desc("Do not print introductory messages"));
  46   cl::alias QA1("silent", cl::desc("Alias for -quiet"), cl::aliasopt(Quiet));
  47   cl::alias QA2("q", cl::desc("Alias for -quiet"), cl::aliasopt(Quiet));
  48 }
  49
  50 //===----------------------------------------------------------------------===//
  51 // main Driver function
  52 //
  53 int main(int argc, char **argv, char * const *envp) {
  54   // Print a stack trace if we signal out.
  55   sys::PrintStackTraceOnErrorSignal();
  56   PrettyStackTraceProgram X(argc, argv);
  57
  58   LLVMContext &Context = getGlobalContext();
  59   llvm_shutdown_obj Y;  // Call llvm_shutdown() on exit.
  60   outs() << "NOTE: llvm-db is known useless right now.\n";
  61   try {
  62     cl::ParseCommandLineOptions(argc, argv,
  63                                 "llvm source-level debugger\n");
  64
  65     if (!Quiet)
  66       outs() << "llvm-db: The LLVM source-level debugger\n";
  67
  68     // Merge Inputfile and InputArgs into the InputArgs list...
  69     if (!InputFile.empty() && InputArgs.empty())
  70       InputArgs.push_back(InputFile);
  71
  72     // Create the CLI debugger...
  73     CLIDebugger D(Context);
  74
  75     // Initialize the debugger with the command line options we read...
  76     Debugger &Dbg = D.getDebugger();
  77
  78     // Initialize the debugger environment.
  79     Dbg.initializeEnvironment(envp);
  80     Dbg.setWorkingDirectory(WorkingDirectory);
  81     for (unsigned i = 0, e = SourceDirectories.size(); i != e; ++i)
  82       D.addSourceDirectory(SourceDirectories[i]);
  83
  84     if (!InputArgs.empty()) {
  85       try {
  86         D.fileCommand(InputArgs[0]);
  87       } catch (const std::string &Error) {
  88         outs() << "Error: " << Error << "\n";
  89       }
  90
  91       Dbg.setProgramArguments(InputArgs.begin()+1, InputArgs.end());
  92     }
  93
  94     // Now that we have initialized the debugger, run it.
  95     return D.run();
  96   } catch (const std::string& msg) {
  97     errs() << argv[0] << ": " << msg << "\n";
  98   } catch (...) {
  99     errs() << argv[0] << ": Unexpected unknown exception occurred.\n";
 100   }
 101   return 1;
 102 }