LLVM 19.0.0git
DebugStringTableSubsection.cpp
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1//===- DebugStringTableSubsection.cpp - CodeView String Table -------------===//
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
10#include "llvm/ADT/StringRef.h"
14#include "llvm/Support/Error.h"
15#include <algorithm>
16#include <cassert>
17#include <cstdint>
18
19using namespace llvm;
20using namespace llvm::codeview;
21
24
26 Stream = Contents;
27 return Error::success();
28}
29
31 return Reader.readStreamRef(Stream);
32}
33
36 BinaryStreamReader Reader(Stream);
37 Reader.setOffset(Offset);
38 StringRef Result;
39 if (auto EC = Reader.readCString(Result))
40 return std::move(EC);
41 return Result;
42}
43
46
48 auto P = StringToId.insert({S, StringSize});
49
50 // If a given string didn't exist in the string table, we want to increment
51 // the string table size and insert it into the reverse lookup.
52 if (P.second) {
53 IdToString.insert({P.first->getValue(), P.first->getKey()});
54 StringSize += S.size() + 1; // +1 for '\0'
55 }
56
57 return P.first->second;
58}
59
61 return StringSize;
62}
63
65 uint32_t Begin = Writer.getOffset();
66 uint32_t End = Begin + StringSize;
67
68 // Write a null string at the beginning.
69 if (auto EC = Writer.writeCString(StringRef()))
70 return EC;
71
72 for (auto &Pair : StringToId) {
73 StringRef S = Pair.getKey();
74 uint32_t Offset = Begin + Pair.getValue();
75 Writer.setOffset(Offset);
76 if (auto EC = Writer.writeCString(S))
77 return EC;
78 assert(Writer.getOffset() <= End);
79 }
80
81 Writer.setOffset(End);
82 assert((End - Begin) == StringSize);
83 return Error::success();
84}
85
86uint32_t DebugStringTableSubsection::size() const { return StringToId.size(); }
87
88std::vector<uint32_t> DebugStringTableSubsection::sortedIds() const {
89 std::vector<uint32_t> Result;
90 Result.reserve(IdToString.size());
91 for (const auto &Entry : IdToString)
92 Result.push_back(Entry.first);
93 llvm::sort(Result);
94 return Result;
95}
96
98 auto Iter = StringToId.find(S);
99 assert(Iter != StringToId.end());
100 return Iter->second;
101}
102
104 auto Iter = IdToString.find(Id);
105 assert(Iter != IdToString.end());
106 return Iter->second;
107}
bool End
Definition: ELF_riscv.cpp:480
#define P(N)
assert(ImpDefSCC.getReg()==AMDGPU::SCC &&ImpDefSCC.isDef())
Provides read only access to a subclass of BinaryStream.
Error readStreamRef(BinaryStreamRef &Ref)
Read the entire remainder of the underlying stream into Ref.
Error readCString(StringRef &Dest)
Read a null terminated string from Dest.
void setOffset(uint64_t Off)
BinaryStreamRef is to BinaryStream what ArrayRef is to an Array.
Provides write only access to a subclass of WritableBinaryStream.
Error writeCString(StringRef Str)
Write the string Str to the underlying stream followed by a null terminator.
void setOffset(uint64_t Off)
Lightweight error class with error context and mandatory checking.
Definition: Error.h:160
static ErrorSuccess success()
Create a success value.
Definition: Error.h:334
Tagged union holding either a T or a Error.
Definition: Error.h:474
unsigned size() const
Definition: StringMap.h:104
iterator end()
Definition: StringMap.h:221
iterator find(StringRef Key)
Definition: StringMap.h:234
bool insert(MapEntryTy *KeyValue)
insert - Insert the specified key/value pair into the map.
Definition: StringMap.h:307
StringRef - Represent a constant reference to a string, i.e.
Definition: StringRef.h:50
constexpr size_t size() const
size - Get the string size.
Definition: StringRef.h:137
Expected< StringRef > getString(uint32_t Offset) const
Error commit(BinaryStreamWriter &Writer) const override
This is an optimization pass for GlobalISel generic memory operations.
Definition: AddressRanges.h:18
@ Offset
Definition: DWP.cpp:456
void sort(IteratorTy Start, IteratorTy End)
Definition: STLExtras.h:1647