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/ADT/Statistic.h" 20 #include "llvm/IR/DebugInfo.h" 21 #include "llvm/IR/Function.h" 22 #include "llvm/Pass.h" 23 #include "llvm/Support/ErrorHandling.h" 24 #include "llvm/Support/raw_ostream.h" 25 using namespace llvm; 26 27 namespace { 28 class ModuleDebugInfoPrinter : public ModulePass { 29 DebugInfoFinder Finder; 30 public: 31 static char ID; // Pass identification, replacement for typeid 32 ModuleDebugInfoPrinter() : ModulePass(ID) { 33 initializeModuleDebugInfoPrinterPass(*PassRegistry::getPassRegistry()); 34 } 35 36 bool runOnModule(Module &M) override; 37 38 void getAnalysisUsage(AnalysisUsage &AU) const override { 39 AU.setPreservesAll(); 40 } 41 void print(raw_ostream &O, const Module *M) const override; 42 }; 43 } 44 45 char ModuleDebugInfoPrinter::ID = 0; 46 INITIALIZE_PASS(ModuleDebugInfoPrinter, "module-debuginfo", 47 "Decodes module-level debug info", false, true) 48 49 ModulePass *llvm::createModuleDebugInfoPrinterPass() { 50 return new ModuleDebugInfoPrinter(); 51 } 52 53 bool ModuleDebugInfoPrinter::runOnModule(Module &M) { 54 Finder.processModule(M); 55 return false; 56 } 57 58 void ModuleDebugInfoPrinter::print(raw_ostream &O, const Module *M) const { 59 for (DICompileUnit CU : Finder.compile_units()) { 60 O << "Compile Unit: "; 61 CU.print(O); 62 O << '\n'; 63 } 64 65 for (DISubprogram S : Finder.subprograms()) { 66 O << "Subprogram: "; 67 S.print(O); 68 O << '\n'; 69 } 70 71 for (DIGlobalVariable GV : Finder.global_variables()) { 72 O << "GlobalVariable: "; 73 GV.print(O); 74 O << '\n'; 75 } 76 77 for (DIType T : Finder.types()) { 78 O << "Type: "; 79 T.print(O); 80 O << '\n'; 81 } 82 } 83
