lib/Analysis/ModuleDebugInfoPrinter.cpp

   1 //===-- ModuleDebugInfoPrinter.cpp - Prints module debug info metadata ----===//
   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 pass decodes the debug info metadata in a module and prints in a
  11 // (sufficiently-prepared-) human-readable form.
  12 //
  13 // For example, run this pass from opt along with the -analyze option, and
  14 // it'll print to standard output.
  15 //
  16 //===----------------------------------------------------------------------===//
  17
  18 #include "llvm/Analysis/Passes.h"
  19 #include "llvm/Analysis/DebugInfo.h"
  20 #include "llvm/Assembly/Writer.h"
  21 #include "llvm/Pass.h"
  22 #include "llvm/Function.h"
  23 #include "llvm/Support/ErrorHandling.h"
  24 #include "llvm/Support/raw_ostream.h"
  25 #include "llvm/ADT/Statistic.h"
  26 using namespace llvm;
  27
  28 namespace {
  29   class ModuleDebugInfoPrinter : public ModulePass {
  30     DebugInfoFinder Finder;
  31   public:
  32     static char ID; // Pass identification, replacement for typeid
  33     ModuleDebugInfoPrinter() : ModulePass(ID) {
  34       initializeModuleDebugInfoPrinterPass(*PassRegistry::getPassRegistry());
  35     }
  36
  37     virtual bool runOnModule(Module &M);
  38
  39     virtual void getAnalysisUsage(AnalysisUsage &AU) const {
  40       AU.setPreservesAll();
  41     }
  42     virtual void print(raw_ostream &O, const Module *M) const;
  43   };
  44 }
  45
  46 char ModuleDebugInfoPrinter::ID = 0;
  47 INITIALIZE_PASS(ModuleDebugInfoPrinter, "module-debuginfo",
  48                 "Decodes module-level debug info", false, true)
  49
  50 ModulePass *llvm::createModuleDebugInfoPrinterPass() {
  51   return new ModuleDebugInfoPrinter();
  52 }
  53
  54 bool ModuleDebugInfoPrinter::runOnModule(Module &M) {
  55   Finder.processModule(M);
  56   return false;
  57 }
  58
  59 void ModuleDebugInfoPrinter::print(raw_ostream &O, const Module *M) const {
  60   for (DebugInfoFinder::iterator I = Finder.compile_unit_begin(),
  61        E = Finder.compile_unit_end(); I != E; ++I) {
  62     O << "Compile Unit: ";
  63     DICompileUnit(*I).print(O);
  64     O << '\n';
  65   }
  66
  67   for (DebugInfoFinder::iterator I = Finder.subprogram_begin(),
  68        E = Finder.subprogram_end(); I != E; ++I) {
  69     O << "Subprogram: ";
  70     DISubprogram(*I).print(O);
  71     O << '\n';
  72   }
  73
  74   for (DebugInfoFinder::iterator I = Finder.global_variable_begin(),
  75        E = Finder.global_variable_end(); I != E; ++I) {
  76     O << "GlobalVariable: ";
  77     DIGlobalVariable(*I).print(O);
  78     O << '\n';
  79   }
  80
  81   for (DebugInfoFinder::iterator I = Finder.type_begin(),
  82        E = Finder.type_end(); I != E; ++I) {
  83     O << "Type: ";
  84     DIType(*I).print(O);
  85     O << '\n';
  86   }
  87 }