LCOV - code coverage report
Current view: top level - include/llvm/IR - DebugInfo.h (source / functions) Hit Total Coverage
Test: llvm-toolchain.info Lines: 2 2 100.0 %
Date: 2018-07-13 00:08:38 Functions: 1 1 100.0 %
Legend: Lines: hit not hit

          Line data    Source code
       1             : //===- DebugInfo.h - Debug Information Helpers ------------------*- C++ -*-===//
       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 file defines a bunch of datatypes that are useful for creating and
      11             : // walking debug info in LLVM IR form. They essentially provide wrappers around
      12             : // the information in the global variables that's needed when constructing the
      13             : // DWARF information.
      14             : //
      15             : //===----------------------------------------------------------------------===//
      16             : 
      17             : #ifndef LLVM_IR_DEBUGINFO_H
      18             : #define LLVM_IR_DEBUGINFO_H
      19             : 
      20             : #include "llvm/ADT/SmallPtrSet.h"
      21             : #include "llvm/ADT/SmallVector.h"
      22             : #include "llvm/ADT/iterator_range.h"
      23             : #include "llvm/IR/DebugInfoMetadata.h"
      24             : 
      25             : namespace llvm {
      26             : 
      27             : class DbgDeclareInst;
      28             : class DbgValueInst;
      29             : class Module;
      30             : 
      31             : /// Find subprogram that is enclosing this scope.
      32             : DISubprogram *getDISubprogram(const MDNode *Scope);
      33             : 
      34             : /// Strip debug info in the module if it exists.
      35             : ///
      36             : /// To do this, we remove all calls to the debugger intrinsics and any named
      37             : /// metadata for debugging. We also remove debug locations for instructions.
      38             : /// Return true if module is modified.
      39             : bool StripDebugInfo(Module &M);
      40             : bool stripDebugInfo(Function &F);
      41             : 
      42             : /// Downgrade the debug info in a module to contain only line table information.
      43             : ///
      44             : /// In order to convert debug info to what -gline-tables-only would have
      45             : /// created, this does the following:
      46             : ///   1) Delete all debug intrinsics.
      47             : ///   2) Delete all non-CU named metadata debug info nodes.
      48             : ///   3) Create new DebugLocs for each instruction.
      49             : ///   4) Create a new CU debug info, and similarly for every metadata node
      50             : ///      that's reachable from the CU debug info.
      51             : ///   All debug type metadata nodes are unreachable and garbage collected.
      52             : bool stripNonLineTableDebugInfo(Module &M);
      53             : 
      54             : /// Return Debug Info Metadata Version by checking module flags.
      55             : unsigned getDebugMetadataVersionFromModule(const Module &M);
      56             : 
      57             : /// Utility to find all debug info in a module.
      58             : ///
      59             : /// DebugInfoFinder tries to list all debug info MDNodes used in a module. To
      60             : /// list debug info MDNodes used by an instruction, DebugInfoFinder uses
      61             : /// processDeclare, processValue and processLocation to handle DbgDeclareInst,
      62             : /// DbgValueInst and DbgLoc attached to instructions. processModule will go
      63             : /// through all DICompileUnits in llvm.dbg.cu and list debug info MDNodes
      64             : /// used by the CUs.
      65         974 : class DebugInfoFinder {
      66             : public:
      67             :   /// Process entire module and collect debug info anchors.
      68             :   void processModule(const Module &M);
      69             :   /// Process a single instruction and collect debug info anchors.
      70             :   void processInstruction(const Module &M, const Instruction &I);
      71             : 
      72             :   /// Process DbgDeclareInst.
      73             :   void processDeclare(const Module &M, const DbgDeclareInst *DDI);
      74             :   /// Process DbgValueInst.
      75             :   void processValue(const Module &M, const DbgValueInst *DVI);
      76             :   /// Process debug info location.
      77             :   void processLocation(const Module &M, const DILocation *Loc);
      78             : 
      79             :   /// Clear all lists.
      80             :   void reset();
      81             : 
      82             : private:
      83             :   void InitializeTypeMap(const Module &M);
      84             : 
      85             :   void processCompileUnit(DICompileUnit *CU);
      86             :   void processScope(DIScope *Scope);
      87             :   void processSubprogram(DISubprogram *SP);
      88             :   void processType(DIType *DT);
      89             :   bool addCompileUnit(DICompileUnit *CU);
      90             :   bool addGlobalVariable(DIGlobalVariableExpression *DIG);
      91             :   bool addScope(DIScope *Scope);
      92             :   bool addSubprogram(DISubprogram *SP);
      93             :   bool addType(DIType *DT);
      94             : 
      95             : public:
      96             :   using compile_unit_iterator =
      97             :       SmallVectorImpl<DICompileUnit *>::const_iterator;
      98             :   using subprogram_iterator = SmallVectorImpl<DISubprogram *>::const_iterator;
      99             :   using global_variable_expression_iterator =
     100             :       SmallVectorImpl<DIGlobalVariableExpression *>::const_iterator;
     101             :   using type_iterator = SmallVectorImpl<DIType *>::const_iterator;
     102             :   using scope_iterator = SmallVectorImpl<DIScope *>::const_iterator;
     103             : 
     104             :   iterator_range<compile_unit_iterator> compile_units() const {
     105             :     return make_range(CUs.begin(), CUs.end());
     106             :   }
     107             : 
     108             :   iterator_range<subprogram_iterator> subprograms() const {
     109             :     return make_range(SPs.begin(), SPs.end());
     110             :   }
     111             : 
     112             :   iterator_range<global_variable_expression_iterator> global_variables() const {
     113             :     return make_range(GVs.begin(), GVs.end());
     114             :   }
     115             : 
     116             :   iterator_range<type_iterator> types() const {
     117             :     return make_range(TYs.begin(), TYs.end());
     118             :   }
     119             : 
     120             :   iterator_range<scope_iterator> scopes() const {
     121             :     return make_range(Scopes.begin(), Scopes.end());
     122             :   }
     123             : 
     124             :   unsigned compile_unit_count() const { return CUs.size(); }
     125             :   unsigned global_variable_count() const { return GVs.size(); }
     126           2 :   unsigned subprogram_count() const { return SPs.size(); }
     127             :   unsigned type_count() const { return TYs.size(); }
     128             :   unsigned scope_count() const { return Scopes.size(); }
     129             : 
     130             : private:
     131             :   SmallVector<DICompileUnit *, 8> CUs;
     132             :   SmallVector<DISubprogram *, 8> SPs;
     133             :   SmallVector<DIGlobalVariableExpression *, 8> GVs;
     134             :   SmallVector<DIType *, 8> TYs;
     135             :   SmallVector<DIScope *, 8> Scopes;
     136             :   SmallPtrSet<const MDNode *, 32> NodesSeen;
     137             : };
     138             : 
     139             : } // end namespace llvm
     140             : 
     141             : #endif // LLVM_IR_DEBUGINFO_H

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