ModuleDebugInfoPrinter.cpp revision 208954 
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
35    virtual bool runOnModule(Module &M);
36
37    virtual void getAnalysisUsage(AnalysisUsage &AU) const {
38      AU.setPreservesAll();
39    }
40    virtual void print(raw_ostream &O, const Module *M) const;
41  };
42}
43
44char ModuleDebugInfoPrinter::ID = 0;
45static RegisterPass<ModuleDebugInfoPrinter>
46X("module-debuginfo",
47  "Decodes module-level debug info", false, true);
48
49ModulePass *llvm::createModuleDebugInfoPrinterPass() {
50  return new ModuleDebugInfoPrinter();
51}
52
53bool ModuleDebugInfoPrinter::runOnModule(Module &M) {
54  Finder.processModule(M);
55  return false;
56}
57
58void ModuleDebugInfoPrinter::print(raw_ostream &O, const Module *M) const {
59  for (DebugInfoFinder::iterator I = Finder.compile_unit_begin(),
60       E = Finder.compile_unit_end(); I != E; ++I) {
61    O << "Compile Unit: ";
62    DICompileUnit(*I).print(O);
63    O << '\n';
64  }
65
66  for (DebugInfoFinder::iterator I = Finder.subprogram_begin(),
67       E = Finder.subprogram_end(); I != E; ++I) {
68    O << "Subprogram: ";
69    DISubprogram(*I).print(O);
70    O << '\n';
71  }
72
73  for (DebugInfoFinder::iterator I = Finder.global_variable_begin(),
74       E = Finder.global_variable_end(); I != E; ++I) {
75    O << "GlobalVariable: ";
76    DIGlobalVariable(*I).print(O);
77    O << '\n';
78  }
79
80  for (DebugInfoFinder::iterator I = Finder.type_begin(),
81       E = Finder.type_end(); I != E; ++I) {
82    O << "Type: ";
83    DIType(*I).print(O);
84    O << '\n';
85  }
86}
87