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
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
|
//===-- ModuleDebugInfoPrinter.cpp - Prints module debug info metadata ----===//
//
// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
// See https://llvm.org/LICENSE.txt for license information.
// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
//
//===----------------------------------------------------------------------===//
//
// 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/ModuleDebugInfoPrinter.h"
#include "llvm/ADT/Statistic.h"
#include "llvm/Analysis/Passes.h"
#include "llvm/IR/DebugInfo.h"
#include "llvm/IR/PassManager.h"
#include "llvm/InitializePasses.h"
#include "llvm/Pass.h"
#include "llvm/Support/ErrorHandling.h"
#include "llvm/Support/raw_ostream.h"
using namespace llvm;
namespace {
class ModuleDebugInfoLegacyPrinter : public ModulePass {
DebugInfoFinder Finder;
public:
static char ID; // Pass identification, replacement for typeid
ModuleDebugInfoLegacyPrinter() : ModulePass(ID) {
initializeModuleDebugInfoLegacyPrinterPass(
*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 ModuleDebugInfoLegacyPrinter::ID = 0;
INITIALIZE_PASS(ModuleDebugInfoLegacyPrinter, "module-debuginfo",
"Decodes module-level debug info", false, true)
ModulePass *llvm::createModuleDebugInfoPrinterPass() {
return new ModuleDebugInfoLegacyPrinter();
}
bool ModuleDebugInfoLegacyPrinter::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;
}
static void printModuleDebugInfo(raw_ostream &O, const Module *M,
const DebugInfoFinder &Finder) {
// 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: ";
auto Lang = dwarf::LanguageString(CU->getSourceLanguage());
if (!Lang.empty())
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 (auto GVU : Finder.global_variables()) {
const auto *GV = GVU->getVariable();
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 << " ";
auto Encoding = dwarf::AttributeEncodingString(BT->getEncoding());
if (!Encoding.empty())
O << Encoding;
else
O << "unknown-encoding(" << BT->getEncoding() << ')';
} else {
O << ' ';
auto Tag = dwarf::TagString(T->getTag());
if (!Tag.empty())
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';
}
}
void ModuleDebugInfoLegacyPrinter::print(raw_ostream &O,
const Module *M) const {
printModuleDebugInfo(O, M, Finder);
}
ModuleDebugInfoPrinterPass::ModuleDebugInfoPrinterPass(raw_ostream &OS)
: OS(OS) {}
PreservedAnalyses ModuleDebugInfoPrinterPass::run(Module &M,
ModuleAnalysisManager &AM) {
Finder.processModule(M);
printModuleDebugInfo(OS, &M, Finder);
return PreservedAnalyses::all();
}
|
