tools/opt/BreakpointPrinter.cpp

   1 //===- BreakpointPrinter.cpp - Breakpoint location printer ----------------===//
   2 //
   3 // Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
   4 // See https://llvm.org/LICENSE.txt for license information.
   5 // SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
   6 //
   7 //===----------------------------------------------------------------------===//
   8 ///
   9 /// \file
  10 /// Breakpoint location printer.
  11 ///
  12 //===----------------------------------------------------------------------===//
  13 #include "BreakpointPrinter.h"
  14 #include "llvm/ADT/StringSet.h"
  15 #include "llvm/IR/DebugInfo.h"
  16 #include "llvm/IR/Module.h"
  17 #include "llvm/Pass.h"
  18 #include "llvm/Support/raw_ostream.h"
  19
  20 using namespace llvm;
  21
  22 namespace {
  23
  24 struct BreakpointPrinter : public ModulePass {
  25   raw_ostream &Out;
  26   static char ID;
  27
  28   BreakpointPrinter(raw_ostream &out) : ModulePass(ID), Out(out) {}
  29
  30   void getContextName(const DIScope *Context, std::string &N) {
  31     if (auto *NS = dyn_cast<DINamespace>(Context)) {
  32       if (!NS->getName().empty()) {
  33         getContextName(NS->getScope(), N);
  34         N = N + NS->getName().str() + "::";
  35       }
  36     } else if (auto *TY = dyn_cast<DIType>(Context)) {
  37       if (!TY->getName().empty()) {
  38         getContextName(TY->getScope(), N);
  39         N = N + TY->getName().str() + "::";
  40       }
  41     }
  42   }
  43
  44   bool runOnModule(Module &M) override {
  45     StringSet<> Processed;
  46     if (NamedMDNode *NMD = M.getNamedMetadata("llvm.dbg.sp"))
  47       for (unsigned i = 0, e = NMD->getNumOperands(); i != e; ++i) {
  48         std::string Name;
  49         auto *SP = cast_or_null<DISubprogram>(NMD->getOperand(i));
  50         if (!SP)
  51           continue;
  52         getContextName(SP->getScope(), Name);
  53         Name = Name + SP->getName().str();
  54         if (!Name.empty() && Processed.insert(Name).second) {
  55           Out << Name << "\n";
  56         }
  57       }
  58     return false;
  59   }
  60
  61   void getAnalysisUsage(AnalysisUsage &AU) const override {
  62     AU.setPreservesAll();
  63   }
  64 };
  65
  66 char BreakpointPrinter::ID = 0;
  67 }
  68
  69 ModulePass *llvm::createBreakpointPrinter(raw_ostream &out) {
  70   return new BreakpointPrinter(out);
  71 }