1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
|
//===-- ModuleDebugInfoPrinter.cpp - Prints module debug info metadata ----===//
//
// The LLVM Compiler Infrastructure
//
// This file is distributed under the University of Illinois Open Source
// License. See LICENSE.TXT for details.
//
//===----------------------------------------------------------------------===//
//
// This pass decodes the debug info metadata in a module and prints in a
// (sufficiently-prepared-) human-readable form.
//
// For example, run this pass from opt along with the -analyze option, and
// it'll print to standard output.
//
//===----------------------------------------------------------------------===//
#include "llvm/Analysis/Passes.h"
#include "llvm/ADT/Statistic.h"
#include "llvm/IR/DebugInfo.h"
#include "llvm/IR/Function.h"
#include "llvm/Pass.h"
#include "llvm/Support/ErrorHandling.h"
#include "llvm/Support/raw_ostream.h"
using namespace llvm;
namespace {
class ModuleDebugInfoPrinter : public ModulePass {
DebugInfoFinder Finder;
public:
static char ID; // Pass identification, replacement for typeid
ModuleDebugInfoPrinter() : ModulePass(ID) {
initializeModuleDebugInfoPrinterPass(*PassRegistry::getPassRegistry());
}
bool runOnModule(Module &M) override;
void getAnalysisUsage(AnalysisUsage &AU) const override {
AU.setPreservesAll();
}
void print(raw_ostream &O, const Module *M) const override;
};
}
char ModuleDebugInfoPrinter::ID = 0;
INITIALIZE_PASS(ModuleDebugInfoPrinter, "module-debuginfo",
"Decodes module-level debug info", false, true)
ModulePass *llvm::createModuleDebugInfoPrinterPass() {
return new ModuleDebugInfoPrinter();
}
bool ModuleDebugInfoPrinter::runOnModule(Module &M) {
Finder.processModule(M);
return false;
}
static void printFile(raw_ostream &O, StringRef Filename, StringRef Directory,
unsigned Line = 0) {
if (Filename.empty())
return;
O << " from ";
if (!Directory.empty())
O << Directory << "/";
O << Filename;
if (Line)
O << ":" << Line;
}
void ModuleDebugInfoPrinter::print(raw_ostream &O, const Module *M) const {
// Printing the nodes directly isn't particularly helpful (since they
// reference other nodes that won't be printed, particularly for the
// filenames), so just print a few useful things.
for (DICompileUnit *CU : Finder.compile_units()) {
O << "Compile unit: ";
if (const char *Lang = dwarf::LanguageString(CU->getSourceLanguage()))
O << Lang;
else
O << "unknown-language(" << CU->getSourceLanguage() << ")";
printFile(O, CU->getFilename(), CU->getDirectory());
O << '\n';
}
for (DISubprogram *S : Finder.subprograms()) {
O << "Subprogram: " << S->getName();
printFile(O, S->getFilename(), S->getDirectory(), S->getLine());
if (!S->getLinkageName().empty())
O << " ('" << S->getLinkageName() << "')";
O << '\n';
}
for (const DIGlobalVariable *GV : Finder.global_variables()) {
O << "Global variable: " << GV->getName();
printFile(O, GV->getFilename(), GV->getDirectory(), GV->getLine());
if (!GV->getLinkageName().empty())
O << " ('" << GV->getLinkageName() << "')";
O << '\n';
}
for (const DIType *T : Finder.types()) {
O << "Type:";
if (!T->getName().empty())
O << ' ' << T->getName();
printFile(O, T->getFilename(), T->getDirectory(), T->getLine());
if (auto *BT = dyn_cast<DIBasicType>(T)) {
O << " ";
if (const char *Encoding =
dwarf::AttributeEncodingString(BT->getEncoding()))
O << Encoding;
else
O << "unknown-encoding(" << BT->getEncoding() << ')';
} else {
O << ' ';
if (const char *Tag = dwarf::TagString(T->getTag()))
O << Tag;
else
O << "unknown-tag(" << T->getTag() << ")";
}
if (auto *CT = dyn_cast<DICompositeType>(T)) {
if (auto *S = CT->getRawIdentifier())
O << " (identifier: '" << S->getString() << "')";
}
O << '\n';
}
}
|
