LLVM  10.0.0svn
DWARFDebugPubTable.cpp
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1 //===- DWARFDebugPubTable.cpp ---------------------------------------------===//
2 //
3 // Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
4 // See https://llvm.org/LICENSE.txt for license information.
5 // SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
6 //
7 //===----------------------------------------------------------------------===//
8 
11 #include "llvm/ADT/StringRef.h"
14 #include "llvm/Support/Format.h"
16 #include <cstdint>
17 
18 using namespace llvm;
19 using namespace dwarf;
20 
22  const DWARFSection &Sec,
23  bool LittleEndian, bool GnuStyle)
24  : GnuStyle(GnuStyle) {
25  DWARFDataExtractor PubNames(Obj, Sec, LittleEndian, 0);
26  uint32_t Offset = 0;
27  while (PubNames.isValidOffset(Offset)) {
28  Sets.push_back({});
29  Set &SetData = Sets.back();
30 
31  SetData.Length = PubNames.getU32(&Offset);
32  SetData.Version = PubNames.getU16(&Offset);
33  SetData.Offset = PubNames.getRelocatedValue(4, &Offset);
34  SetData.Size = PubNames.getU32(&Offset);
35 
36  while (Offset < Sec.Data.size()) {
37  uint32_t DieRef = PubNames.getU32(&Offset);
38  if (DieRef == 0)
39  break;
40  uint8_t IndexEntryValue = GnuStyle ? PubNames.getU8(&Offset) : 0;
41  StringRef Name = PubNames.getCStrRef(&Offset);
42  SetData.Entries.push_back(
43  {DieRef, PubIndexEntryDescriptor(IndexEntryValue), Name});
44  }
45  }
46 }
47 
49  for (const Set &S : Sets) {
50  OS << "length = " << format("0x%08x", S.Length);
51  OS << " version = " << format("0x%04x", S.Version);
52  OS << " unit_offset = " << format("0x%08x", S.Offset);
53  OS << " unit_size = " << format("0x%08x", S.Size) << '\n';
54  OS << (GnuStyle ? "Offset Linkage Kind Name\n"
55  : "Offset Name\n");
56 
57  for (const Entry &E : S.Entries) {
58  OS << format("0x%8.8x ", E.SecOffset);
59  if (GnuStyle) {
60  StringRef EntryLinkage =
63  OS << format("%-8s", EntryLinkage.data()) << ' '
64  << format("%-8s", EntryKind.data()) << ' ';
65  }
66  OS << '\"' << E.Name << "\"\n";
67  }
68  }
69 }
This class represents lattice values for constants.
Definition: AllocatorList.h:23
amdgpu Simplify well known AMD library false FunctionCallee Value const Twine & Name
format_object< Ts... > format(const char *Fmt, const Ts &... Vals)
These are helper functions used to produce formatted output.
Definition: Format.h:123
uint16_t getU16(uint32_t *offset_ptr) const
Extract a uint16_t value from *offset_ptr.
void dump(raw_ostream &OS) const
uint32_t getU32(uint32_t *offset_ptr) const
Extract a uint32_t value from *offset_ptr.
Each table consists of sets of variable length entries.
DWARFDebugPubTable(const DWARFObject &Obj, const DWARFSection &Sec, bool LittleEndian, bool GnuStyle)
Describes an entry of the various gnu_pub* debug sections.
Definition: Dwarf.h:562
LLVM_NODISCARD size_t size() const
size - Get the string size.
Definition: StringRef.h:130
StringRef GDBIndexEntryKindString(GDBIndexEntryKind Kind)
Definition: Dwarf.cpp:545
uint32_t Size
The size in bytes of the contents of the .debug_info section generated to represent that compilation ...
static GCRegistry::Add< CoreCLRGC > E("coreclr", "CoreCLR-compatible GC")
uint8_t getU8(uint32_t *offset_ptr) const
Extract a uint8_t value from *offset_ptr.
uint32_t Length
The total length of the entries for that set, not including the length field itself.
StringRef GDBIndexEntryLinkageString(GDBIndexEntryLinkage Linkage)
Definition: Dwarf.cpp:568
GDBIndexEntryLinkage Linkage
Definition: Dwarf.h:564
uint64_t getRelocatedValue(uint32_t Size, uint32_t *Off, uint64_t *SectionIndex=nullptr) const
Extracts a value and applies a relocation to the result if one exists for the given offset...
A DataExtractor (typically for an in-memory copy of an object-file section) plus a relocation map for...
uint32_t Offset
The offset from the beginning of the .debug_info section of the compilation unit header referenced by...
uint32_t SecOffset
Section offset from the beginning of the compilation unit.
This file contains constants used for implementing Dwarf debug support.
dwarf::PubIndexEntryDescriptor Descriptor
An entry of the various gnu_pub* debug sections.
bool isValidOffset(uint32_t offset) const
Test the validity of offset.
LLVM_NODISCARD const char * data() const
data - Get a pointer to the start of the string (which may not be null terminated).
Definition: StringRef.h:122
uint16_t Version
This number is specific to the name lookup table and is independent of the DWARF version number...
StringRef getCStrRef(uint32_t *OffsetPtr) const
Extract a C string from *OffsetPtr.
This class implements an extremely fast bulk output stream that can only output to a stream...
Definition: raw_ostream.h:45
StringRef - Represent a constant reference to a string, i.e.
Definition: StringRef.h:48
StringRef Name
The name of the object as given by the DW_AT_name attribute of the referenced DIE.