ModuleDebugInfoPrinter.cpp revision 081c34b725980f995be9080eaec24cd3dfaaf065 
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"
26using namespace llvm;
27
28namespace {
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
46char ModuleDebugInfoPrinter::ID = 0;
47INITIALIZE_PASS(ModuleDebugInfoPrinter, "module-debuginfo",
48                "Decodes module-level debug info", false, true)
49
50ModulePass *llvm::createModuleDebugInfoPrinterPass() {
51  return new ModuleDebugInfoPrinter();
52}
53
54bool ModuleDebugInfoPrinter::runOnModule(Module &M) {
55  Finder.processModule(M);
56  return false;
57}
58
59void 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}
88