1 | //===---- llvm-jitlink.h - Session and format-specific decls ----*- C++ -*-===// |
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 | // |
9 | // llvm-jitlink Session class and tool utilities. |
10 | // |
11 | //===----------------------------------------------------------------------===// |
12 | |
13 | #ifndef LLVM_TOOLS_LLVM_JITLINK_LLVM_JITLINK_H |
14 | #define LLVM_TOOLS_LLVM_JITLINK_LLVM_JITLINK_H |
15 | |
16 | #include "llvm/ADT/StringSet.h" |
17 | #include "llvm/ExecutionEngine/Orc/COFF.h" |
18 | #include "llvm/ExecutionEngine/Orc/Core.h" |
19 | #include "llvm/ExecutionEngine/Orc/ExecutorProcessControl.h" |
20 | #include "llvm/ExecutionEngine/Orc/LazyObjectLinkingLayer.h" |
21 | #include "llvm/ExecutionEngine/Orc/LazyReexports.h" |
22 | #include "llvm/ExecutionEngine/Orc/ObjectLinkingLayer.h" |
23 | #include "llvm/ExecutionEngine/Orc/RedirectionManager.h" |
24 | #include "llvm/ExecutionEngine/Orc/SimpleRemoteEPC.h" |
25 | #include "llvm/ExecutionEngine/RuntimeDyldChecker.h" |
26 | #include "llvm/Support/Error.h" |
27 | #include "llvm/Support/Regex.h" |
28 | #include "llvm/Support/raw_ostream.h" |
29 | #include "llvm/TargetParser/SubtargetFeature.h" |
30 | #include "llvm/TargetParser/Triple.h" |
31 | |
32 | namespace llvm { |
33 | |
34 | struct Session { |
35 | |
36 | struct LazyLinkingSupport { |
37 | LazyLinkingSupport( |
38 | std::unique_ptr<orc::RedirectableSymbolManager> RSMgr, |
39 | std::shared_ptr<orc::SimpleLazyReexportsSpeculator> Speculator, |
40 | std::unique_ptr<orc::LazyReexportsManager> LRMgr, |
41 | orc::ObjectLinkingLayer &ObjLinkingLayer) |
42 | : RSMgr(std::move(RSMgr)), Speculator(std::move(Speculator)), |
43 | LRMgr(std::move(LRMgr)), |
44 | LazyObjLinkingLayer(ObjLinkingLayer, *this->LRMgr) {} |
45 | |
46 | std::unique_ptr<orc::RedirectableSymbolManager> RSMgr; |
47 | std::shared_ptr<orc::SimpleLazyReexportsSpeculator> Speculator; |
48 | std::unique_ptr<orc::LazyReexportsManager> LRMgr; |
49 | orc::LazyObjectLinkingLayer LazyObjLinkingLayer; |
50 | }; |
51 | |
52 | orc::ExecutionSession ES; |
53 | orc::JITDylib *MainJD = nullptr; |
54 | orc::JITDylib *ProcessSymsJD = nullptr; |
55 | orc::JITDylib *PlatformJD = nullptr; |
56 | orc::ObjectLinkingLayer ObjLayer; |
57 | std::unique_ptr<LazyLinkingSupport> LazyLinking; |
58 | orc::JITDylibSearchOrder JDSearchOrder; |
59 | SubtargetFeatures Features; |
60 | std::vector<std::pair<std::string, orc::SymbolStringPtr>> LazyFnExecOrder; |
61 | |
62 | ~Session(); |
63 | |
64 | static Expected<std::unique_ptr<Session>> Create(Triple TT, |
65 | SubtargetFeatures Features); |
66 | void dumpSessionInfo(raw_ostream &OS); |
67 | void modifyPassConfig(jitlink::LinkGraph &G, |
68 | jitlink::PassConfiguration &PassConfig); |
69 | |
70 | /// For -check: wait for all files that are referenced (transitively) from |
71 | /// the entry point *file* to be linked. (ORC's usual dependence tracking is |
72 | /// to fine-grained here: a lookup of the main symbol will return as soon as |
73 | /// all reachable symbols have been linked, but testcases may want to |
74 | /// inspect side-effects in unreachable symbols).. |
75 | void waitForFilesLinkedFromEntryPointFile() { |
76 | std::unique_lock<std::mutex> Lock(M); |
77 | return ActiveLinksCV.wait(lock&: Lock, p: [this]() { return ActiveLinks == 0; }); |
78 | } |
79 | |
80 | using MemoryRegionInfo = RuntimeDyldChecker::MemoryRegionInfo; |
81 | |
82 | struct FileInfo { |
83 | StringMap<MemoryRegionInfo> SectionInfos; |
84 | StringMap<SmallVector<MemoryRegionInfo, 1>> StubInfos; |
85 | StringMap<MemoryRegionInfo> GOTEntryInfos; |
86 | |
87 | using Symbol = jitlink::Symbol; |
88 | using LinkGraph = jitlink::LinkGraph; |
89 | using GetSymbolTargetFunction = |
90 | unique_function<Expected<Symbol &>(LinkGraph &G, jitlink::Block &)>; |
91 | Error registerGOTEntry(LinkGraph &G, Symbol &Sym, |
92 | GetSymbolTargetFunction GetSymbolTarget); |
93 | Error registerStubEntry(LinkGraph &G, Symbol &Sym, |
94 | GetSymbolTargetFunction GetSymbolTarget); |
95 | Error registerMultiStubEntry(LinkGraph &G, Symbol &Sym, |
96 | GetSymbolTargetFunction GetSymbolTarget); |
97 | }; |
98 | |
99 | using DynLibJDMap = std::map<std::string, orc::JITDylib *, std::less<>>; |
100 | using SymbolInfoMap = DenseMap<orc::SymbolStringPtr, MemoryRegionInfo>; |
101 | using FileInfoMap = StringMap<FileInfo>; |
102 | |
103 | Expected<orc::JITDylib *> getOrLoadDynamicLibrary(StringRef LibPath); |
104 | Error loadAndLinkDynamicLibrary(orc::JITDylib &JD, StringRef LibPath); |
105 | |
106 | orc::ObjectLayer &getLinkLayer(bool Lazy) { |
107 | assert((!Lazy || LazyLinking) && |
108 | "Lazy linking requested but not available" ); |
109 | return Lazy ? static_cast<orc::ObjectLayer &>( |
110 | LazyLinking->LazyObjLinkingLayer) |
111 | : static_cast<orc::ObjectLayer &>(ObjLayer); |
112 | } |
113 | |
114 | Expected<FileInfo &> findFileInfo(StringRef FileName); |
115 | Expected<MemoryRegionInfo &> findSectionInfo(StringRef FileName, |
116 | StringRef SectionName); |
117 | Expected<MemoryRegionInfo &> findStubInfo(StringRef FileName, |
118 | StringRef TargetName, |
119 | StringRef KindNameFilter); |
120 | Expected<MemoryRegionInfo &> findGOTEntryInfo(StringRef FileName, |
121 | StringRef TargetName); |
122 | |
123 | bool isSymbolRegistered(const orc::SymbolStringPtr &Name); |
124 | Expected<MemoryRegionInfo &> findSymbolInfo(const orc::SymbolStringPtr &Name, |
125 | Twine ErrorMsgStem); |
126 | |
127 | DynLibJDMap DynLibJDs; |
128 | |
129 | std::mutex M; |
130 | std::condition_variable ActiveLinksCV; |
131 | size_t ActiveLinks = 0; |
132 | SymbolInfoMap SymbolInfos; |
133 | FileInfoMap FileInfos; |
134 | |
135 | StringSet<> HarnessFiles; |
136 | StringSet<> HarnessExternals; |
137 | StringSet<> HarnessDefinitions; |
138 | DenseMap<StringRef, StringRef> CanonicalWeakDefs; |
139 | |
140 | StringSet<> HiddenArchives; |
141 | |
142 | std::optional<Regex> ShowGraphsRegex; |
143 | |
144 | private: |
145 | Session(std::unique_ptr<orc::ExecutorProcessControl> EPC, Error &Err); |
146 | }; |
147 | |
148 | /// Record symbols, GOT entries, stubs, and sections for ELF file. |
149 | Error registerELFGraphInfo(Session &S, jitlink::LinkGraph &G); |
150 | |
151 | /// Record symbols, GOT entries, stubs, and sections for MachO file. |
152 | Error registerMachOGraphInfo(Session &S, jitlink::LinkGraph &G); |
153 | |
154 | /// Record symbols, GOT entries, stubs, and sections for COFF file. |
155 | Error registerCOFFGraphInfo(Session &S, jitlink::LinkGraph &G); |
156 | |
157 | /// Adds a statistics gathering plugin if any stats options are used. |
158 | void enableStatistics(Session &S, bool UsingOrcRuntime); |
159 | |
160 | } // end namespace llvm |
161 | |
162 | #endif // LLVM_TOOLS_LLVM_JITLINK_LLVM_JITLINK_H |
163 | |