src/llvm/tools/opt/BreakpointPrinter.cpp

   1 //===- BreakpointPrinter.cpp - Breakpoint location printer ----------------===//
   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 /// \file
  11 /// \brief Breakpoint location printer.
  12 ///
  13 //===----------------------------------------------------------------------===//
  14 #include "BreakpointPrinter.h"
  15 #include "llvm/ADT/StringSet.h"
  16 #include "llvm/IR/DebugInfo.h"
  17 #include "llvm/IR/Module.h"
  18 #include "llvm/Pass.h"
  19 #include "llvm/Support/raw_ostream.h"
  20
  21 using namespace llvm;
  22
  23 namespace {
  24
  25 struct BreakpointPrinter : public ModulePass {
  26   raw_ostream &Out;
  27   static char ID;
  28   DITypeIdentifierMap TypeIdentifierMap;
  29
  30   BreakpointPrinter(raw_ostream &out) : ModulePass(ID), Out(out) {}
  31
  32   void getContextName(DIDescriptor Context, std::string &N) {
  33     if (Context.isNameSpace()) {
  34       DINameSpace NS(Context);
  35       if (!NS.getName().empty()) {
  36         getContextName(NS.getContext(), N);
  37         N = N + NS.getName().str() + "::";
  38       }
  39     } else if (Context.isType()) {
  40       DIType TY(Context);
  41       if (!TY.getName().empty()) {
  42         getContextName(TY.getContext().resolve(TypeIdentifierMap), N);
  43         N = N + TY.getName().str() + "::";
  44       }
  45     }
  46   }
  47
  48   bool runOnModule(Module &M) override {
  49     TypeIdentifierMap.clear();
  50     NamedMDNode *CU_Nodes = M.getNamedMetadata("llvm.dbg.cu");
  51     if (CU_Nodes)
  52       TypeIdentifierMap = generateDITypeIdentifierMap(CU_Nodes);
  53
  54     StringSet<> Processed;
  55     if (NamedMDNode *NMD = M.getNamedMetadata("llvm.dbg.sp"))
  56       for (unsigned i = 0, e = NMD->getNumOperands(); i != e; ++i) {
  57         std::string Name;
  58         DISubprogram SP(NMD->getOperand(i));
  59         assert((!SP || SP.isSubprogram()) &&
  60                "A MDNode in llvm.dbg.sp should be null or a DISubprogram.");
  61         if (!SP)
  62           continue;
  63         getContextName(SP.getContext().resolve(TypeIdentifierMap), Name);
  64         Name = Name + SP.getDisplayName().str();
  65         if (!Name.empty() && Processed.insert(Name).second) {
  66           Out << Name << "\n";
  67         }
  68       }
  69     return false;
  70   }
  71
  72   void getAnalysisUsage(AnalysisUsage &AU) const override {
  73     AU.setPreservesAll();
  74   }
  75 };
  76
  77 char BreakpointPrinter::ID = 0;
  78 }
  79
  80 ModulePass *llvm::createBreakpointPrinter(raw_ostream &out) {
  81   return new BreakpointPrinter(out);
  82 }