LLVM 19.0.0git
NativeEnumInjectedSources.cpp
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1//==- NativeEnumInjectedSources.cpp - Native Injected Source Enumerator --*-==//
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
17
18namespace llvm {
19namespace pdb {
20
21namespace {
22
23Expected<std::string> readStreamData(BinaryStream &Stream, uint64_t Limit) {
24 uint64_t Offset = 0, DataLength = std::min(Limit, Stream.getLength());
25 std::string Result;
26 Result.reserve(DataLength);
27 while (Offset < DataLength) {
28 ArrayRef<uint8_t> Data;
29 if (auto E = Stream.readLongestContiguousChunk(Offset, Data))
30 return std::move(E);
31 Data = Data.take_front(DataLength - Offset);
32 Offset += Data.size();
34 }
35 return Result;
36}
37
38class NativeInjectedSource final : public IPDBInjectedSource {
39 const SrcHeaderBlockEntry &Entry;
40 const PDBStringTable &Strings;
41 PDBFile &File;
42
43public:
44 NativeInjectedSource(const SrcHeaderBlockEntry &Entry,
45 PDBFile &File, const PDBStringTable &Strings)
46 : Entry(Entry), Strings(Strings), File(File) {}
47
48 uint32_t getCrc32() const override { return Entry.CRC; }
49 uint64_t getCodeByteSize() const override { return Entry.FileSize; }
50
51 std::string getFileName() const override {
52 StringRef Ret = cantFail(Strings.getStringForID(Entry.FileNI),
53 "InjectedSourceStream should have rejected this");
54 return std::string(Ret);
55 }
56
57 std::string getObjectFileName() const override {
58 StringRef Ret = cantFail(Strings.getStringForID(Entry.ObjNI),
59 "InjectedSourceStream should have rejected this");
60 return std::string(Ret);
61 }
62
63 std::string getVirtualFileName() const override {
64 StringRef Ret = cantFail(Strings.getStringForID(Entry.VFileNI),
65 "InjectedSourceStream should have rejected this");
66 return std::string(Ret);
67 }
68
69 uint32_t getCompression() const override { return Entry.Compression; }
70
71 std::string getCode() const override {
72 // Get name of stream storing the data.
73 StringRef VName =
74 cantFail(Strings.getStringForID(Entry.VFileNI),
75 "InjectedSourceStream should have rejected this");
76 std::string StreamName = ("/src/files/" + VName).str();
77
78 // Find stream with that name and read its data.
79 // FIXME: Consider validating (or even loading) all this in
80 // InjectedSourceStream so that no error can happen here.
81 auto ExpectedFileStream = File.safelyCreateNamedStream(StreamName);
82 if (!ExpectedFileStream) {
83 consumeError(ExpectedFileStream.takeError());
84 return "(failed to open data stream)";
85 }
86
87 auto Data = readStreamData(**ExpectedFileStream, Entry.FileSize);
88 if (!Data) {
89 consumeError(Data.takeError());
90 return "(failed to read data)";
91 }
92 return *Data;
93 }
94};
95
96} // namespace
97
99 PDBFile &File, const InjectedSourceStream &IJS,
100 const PDBStringTable &Strings)
101 : File(File), Stream(IJS), Strings(Strings), Cur(Stream.begin()) {}
102
104 return static_cast<uint32_t>(Stream.size());
105}
106
107std::unique_ptr<IPDBInjectedSource>
109 if (N >= getChildCount())
110 return nullptr;
111 return std::make_unique<NativeInjectedSource>(std::next(Stream.begin(), N)->second,
112 File, Strings);
113}
114
115std::unique_ptr<IPDBInjectedSource> NativeEnumInjectedSources::getNext() {
116 if (Cur == Stream.end())
117 return nullptr;
118 return std::make_unique<NativeInjectedSource>((Cur++)->second, File, Strings);
119}
120
121void NativeEnumInjectedSources::reset() { Cur = Stream.begin(); }
122
123}
124}
static GCRegistry::Add< CoreCLRGC > E("coreclr", "CoreCLR-compatible GC")
static Expected< StringRef > getFileName(const DebugStringTableSubsectionRef &Strings, const DebugChecksumsSubsectionRef &Checksums, uint32_t FileID)
This file contains some functions that are useful when dealing with strings.
std::unique_ptr< IPDBInjectedSource > getChildAtIndex(uint32_t Index) const override
NativeEnumInjectedSources(PDBFile &File, const InjectedSourceStream &IJS, const PDBStringTable &Strings)
std::unique_ptr< IPDBInjectedSource > getNext() override
StringRef toStringRef(const std::optional< DWARFFormValue > &V, StringRef Default={})
Take an optional DWARFFormValue and try to extract a string value from it.
This is an optimization pass for GlobalISel generic memory operations.
Definition: AddressRanges.h:18
void cantFail(Error Err, const char *Msg=nullptr)
Report a fatal error if Err is a failure value.
Definition: Error.h:749
void consumeError(Error Err)
Consume a Error without doing anything.
Definition: Error.h:1041
#define N