LLVM: lib/ExecutionEngine/JITLink/PerGraphGOTAndPLTStubsBuilder.h Source File (original) (raw)
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13#ifndef LLVM_EXECUTIONENGINE_JITLINK_PERGRAPHGOTANDPLTSTUBSBUILDER_H
14#define LLVM_EXECUTIONENGINE_JITLINK_PERGRAPHGOTANDPLTSTUBSBUILDER_H
15
18
19#define DEBUG_TYPE "jitlink"
20
21namespace llvm {
22namespace jitlink {
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30
31template
33public:
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39 LLVM_DEBUG(dbgs() << "Running Per-Graph GOT and Stubs builder:\n");
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42
43 std::vector<Block *> Worklist(G.blocks().begin(), G.blocks().end());
44
45 for (auto *B : Worklist)
46 for (auto &E : B->edges()) {
47 if (impl().isGOTEdgeToFix(E)) {
49 dbgs() << " Fixing " << G.getEdgeKindName(E.getKind())
50 << " edge at " << B->getFixupAddress(E) << " ("
51 << B->getAddress() << " + "
52 << formatv("{0:x}", E.getOffset()) << ")\n";
53 });
55 } else if (impl().isExternalBranchEdge(E)) {
57 dbgs() << " Fixing " << G.getEdgeKindName(E.getKind())
58 << " edge at " << B->getFixupAddress(E) << " ("
59 << B->getAddress() << " + "
60 << formatv("{0:x}", E.getOffset()) << ")\n";
61 });
62 impl().fixPLTEdge(E, getPLTStub(E.getTarget()));
63 }
64 }
65
67 }
68
69protected:
71 assert(Target.hasName() && "GOT edge cannot point to anonymous target");
72
73 auto GOTEntryI = GOTEntries.find(Target.getName());
74
75
76 if (GOTEntryI == GOTEntries.end()) {
77 auto &GOTEntry = impl().createGOTEntry(Target);
80 << GOTEntry << "\n";
81 });
82 GOTEntryI =
83 GOTEntries.insert(std::make_pair(Target.getName(), &GOTEntry)).first;
84 }
85
86 assert(GOTEntryI != GOTEntries.end() && "Could not get GOT entry symbol");
88 { dbgs() << " Using GOT entry " << *GOTEntryI->second << "\n"; });
89 return *GOTEntryI->second;
90 }
91
94 "External branch edge can not point to an anonymous target");
96
97 if (StubI == PLTStubs.end()) {
98 auto &StubSymbol = impl().createPLTStub(Target);
101 << StubSymbol << "\n";
102 });
103 StubI =
104 PLTStubs.insert(std::make_pair(Target.getName(), &StubSymbol)).first;
105 }
106
107 assert(StubI != PLTStubs.end() && "Count not get stub symbol");
108 LLVM_DEBUG({ dbgs() << " Using PLT stub " << *StubI->second << "\n"; });
109 return *StubI->second;
110 }
111
113
114private:
115 BuilderImplT &impl() { return static_cast<BuilderImplT &>(*this); }
116
119};
120
121}
122}
123
124#undef DEBUG_TYPE
125
126#endif
assert(UImm &&(UImm !=~static_cast< T >(0)) &&"Invalid immediate!")
static GCRegistry::Add< CoreCLRGC > E("coreclr", "CoreCLR-compatible GC")
static GCRegistry::Add< OcamlGC > B("ocaml", "ocaml 3.10-compatible GC")
Lightweight error class with error context and mandatory checking.
static ErrorSuccess success()
Create a success value.
Target - Wrapper for Target specific information.
const char * getName() const
getName - Get the target name.
Symbol & getPLTStub(Symbol &Target)
Definition PerGraphGOTAndPLTStubsBuilder.h:92
Symbol & getGOTEntry(Symbol &Target)
Definition PerGraphGOTAndPLTStubsBuilder.h:70
Error run()
Definition PerGraphGOTAndPLTStubsBuilder.h:38
PerGraphGOTAndPLTStubsBuilder(LinkGraph &G)
Definition PerGraphGOTAndPLTStubsBuilder.h:34
static Error asPass(LinkGraph &G)
Definition PerGraphGOTAndPLTStubsBuilder.h:36
LinkGraph & G
Definition PerGraphGOTAndPLTStubsBuilder.h:112
This is an optimization pass for GlobalISel generic memory operations.
auto formatv(bool Validate, const char *Fmt, Ts &&...Vals)
LLVM_ABI raw_ostream & dbgs()
dbgs() - This returns a reference to a raw_ostream for debugging messages.