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
149
150
151
152
153
154
155
156
|
//===- IRObjectFile.cpp - IR object file implementation ---------*- C++ -*-===//
//
// 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
//
//===----------------------------------------------------------------------===//
//
// Part of the IRObjectFile class implementation.
//
//===----------------------------------------------------------------------===//
#include "llvm/Object/IRObjectFile.h"
#include "llvm/ADT/ArrayRef.h"
#include "llvm/ADT/PointerUnion.h"
#include "llvm/BinaryFormat/Magic.h"
#include "llvm/Bitcode/BitcodeReader.h"
#include "llvm/IR/Module.h"
#include "llvm/Object/ObjectFile.h"
using namespace llvm;
using namespace object;
namespace llvm {
class LLVMContext;
class raw_ostream;
} // namespace llvm
IRObjectFile::IRObjectFile(MemoryBufferRef Object,
std::vector<std::unique_ptr<Module>> Mods)
: SymbolicFile(Binary::ID_IR, Object), Mods(std::move(Mods)) {
for (auto &M : this->Mods)
SymTab.addModule(M.get());
}
IRObjectFile::~IRObjectFile() = default;
static ModuleSymbolTable::Symbol getSym(DataRefImpl &Symb) {
return *reinterpret_cast<ModuleSymbolTable::Symbol *>(Symb.p);
}
void IRObjectFile::moveSymbolNext(DataRefImpl &Symb) const {
Symb.p += sizeof(ModuleSymbolTable::Symbol);
}
Error IRObjectFile::printSymbolName(raw_ostream &OS, DataRefImpl Symb) const {
SymTab.printSymbolName(OS, getSym(Symb));
return Error::success();
}
Expected<uint32_t> IRObjectFile::getSymbolFlags(DataRefImpl Symb) const {
return SymTab.getSymbolFlags(getSym(Symb));
}
basic_symbol_iterator IRObjectFile::symbol_begin() const {
DataRefImpl Ret;
Ret.p = reinterpret_cast<uintptr_t>(SymTab.symbols().data());
return basic_symbol_iterator(BasicSymbolRef(Ret, this));
}
basic_symbol_iterator IRObjectFile::symbol_end() const {
DataRefImpl Ret;
Ret.p = reinterpret_cast<uintptr_t>(SymTab.symbols().data() +
SymTab.symbols().size());
return basic_symbol_iterator(BasicSymbolRef(Ret, this));
}
StringRef IRObjectFile::getTargetTriple() const {
// Each module must have the same target triple, so we arbitrarily access the
// first one.
return Mods[0]->getTargetTriple();
}
Expected<MemoryBufferRef>
IRObjectFile::findBitcodeInObject(const ObjectFile &Obj) {
for (const SectionRef &Sec : Obj.sections()) {
if (Sec.isBitcode()) {
Expected<StringRef> Contents = Sec.getContents();
if (!Contents)
return Contents.takeError();
if (Contents->size() <= 1)
return errorCodeToError(object_error::bitcode_section_not_found);
return MemoryBufferRef(*Contents, Obj.getFileName());
}
}
return errorCodeToError(object_error::bitcode_section_not_found);
}
Expected<MemoryBufferRef>
IRObjectFile::findBitcodeInMemBuffer(MemoryBufferRef Object) {
file_magic Type = identify_magic(Object.getBuffer());
switch (Type) {
case file_magic::bitcode:
return Object;
case file_magic::elf_relocatable:
case file_magic::macho_object:
case file_magic::wasm_object:
case file_magic::coff_object: {
Expected<std::unique_ptr<ObjectFile>> ObjFile =
ObjectFile::createObjectFile(Object, Type);
if (!ObjFile)
return ObjFile.takeError();
return findBitcodeInObject(*ObjFile->get());
}
default:
return errorCodeToError(object_error::invalid_file_type);
}
}
Expected<std::unique_ptr<IRObjectFile>>
IRObjectFile::create(MemoryBufferRef Object, LLVMContext &Context) {
Expected<MemoryBufferRef> BCOrErr = findBitcodeInMemBuffer(Object);
if (!BCOrErr)
return BCOrErr.takeError();
Expected<std::vector<BitcodeModule>> BMsOrErr =
getBitcodeModuleList(*BCOrErr);
if (!BMsOrErr)
return BMsOrErr.takeError();
std::vector<std::unique_ptr<Module>> Mods;
for (auto BM : *BMsOrErr) {
Expected<std::unique_ptr<Module>> MOrErr =
BM.getLazyModule(Context, /*ShouldLazyLoadMetadata*/ true,
/*IsImporting*/ false);
if (!MOrErr)
return MOrErr.takeError();
Mods.push_back(std::move(*MOrErr));
}
return std::unique_ptr<IRObjectFile>(
new IRObjectFile(*BCOrErr, std::move(Mods)));
}
Expected<IRSymtabFile> object::readIRSymtab(MemoryBufferRef MBRef) {
IRSymtabFile F;
Expected<MemoryBufferRef> BCOrErr =
IRObjectFile::findBitcodeInMemBuffer(MBRef);
if (!BCOrErr)
return BCOrErr.takeError();
Expected<BitcodeFileContents> BFCOrErr = getBitcodeFileContents(*BCOrErr);
if (!BFCOrErr)
return BFCOrErr.takeError();
Expected<irsymtab::FileContents> FCOrErr = irsymtab::readBitcode(*BFCOrErr);
if (!FCOrErr)
return FCOrErr.takeError();
F.Mods = std::move(BFCOrErr->Mods);
F.Symtab = std::move(FCOrErr->Symtab);
F.Strtab = std::move(FCOrErr->Strtab);
F.TheReader = std::move(FCOrErr->TheReader);
return std::move(F);
}
|
