LLVM 17.0.0git
EPCDynamicLibrarySearchGenerator.cpp
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1//===---------------- EPCDynamicLibrarySearchGenerator.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
10
11namespace llvm {
12namespace orc {
13
14Expected<std::unique_ptr<EPCDynamicLibrarySearchGenerator>>
16 const char *LibraryPath,
17 SymbolPredicate Allow) {
18 auto Handle = ES.getExecutorProcessControl().loadDylib(LibraryPath);
19 if (!Handle)
20 return Handle.takeError();
21
22 return std::make_unique<EPCDynamicLibrarySearchGenerator>(ES, *Handle,
23 std::move(Allow));
24}
25
28 JITDylibLookupFlags JDLookupFlags, const SymbolLookupSet &Symbols) {
29
30 if (Symbols.empty())
31 return Error::success();
32
33 SymbolLookupSet LookupSymbols;
34
35 for (auto &KV : Symbols) {
36 // Skip symbols that don't match the filter.
37 if (Allow && !Allow(KV.first))
38 continue;
39 LookupSymbols.add(KV.first, SymbolLookupFlags::WeaklyReferencedSymbol);
40 }
41
42 SymbolMap NewSymbols;
43
44 ExecutorProcessControl::LookupRequest Request(H, LookupSymbols);
45 auto Result = EPC.lookupSymbols(Request);
46 if (!Result)
47 return Result.takeError();
48
49 assert(Result->size() == 1 && "Results for more than one library returned");
50 assert(Result->front().size() == LookupSymbols.size() &&
51 "Result has incorrect number of elements");
52
53 auto ResultI = Result->front().begin();
54 for (auto &KV : LookupSymbols) {
55 if (*ResultI)
56 NewSymbols[KV.first] =
57 JITEvaluatedSymbol(ResultI->getValue(), JITSymbolFlags::Exported);
58 ++ResultI;
59 }
60
61 // If there were no resolved symbols bail out.
62 if (NewSymbols.empty())
63 return Error::success();
64
65 // Define resolved symbols.
66 return JD.define(absoluteSymbols(std::move(NewSymbols)));
67}
68
69} // end namespace orc
70} // end namespace llvm
assert(ImpDefSCC.getReg()==AMDGPU::SCC &&ImpDefSCC.isDef())
bool empty() const
Definition: DenseMap.h:98
Lightweight error class with error context and mandatory checking.
Definition: Error.h:156
static ErrorSuccess success()
Create a success value.
Definition: Error.h:330
Represents a symbol that has been evaluated to an address already.
Definition: JITSymbol.h:229
static Expected< std::unique_ptr< EPCDynamicLibrarySearchGenerator > > Load(ExecutionSession &ES, const char *LibraryPath, SymbolPredicate Allow=SymbolPredicate())
Permanently loads the library at the given path and, on success, returns a DynamicLibrarySearchGenera...
Error tryToGenerate(LookupState &LS, LookupKind K, JITDylib &JD, JITDylibLookupFlags JDLookupFlags, const SymbolLookupSet &Symbols) override
DefinitionGenerators should override this method to insert new definitions into the parent JITDylib.
An ExecutionSession represents a running JIT program.
Definition: Core.h:1373
ExecutorProcessControl & getExecutorProcessControl()
Get the ExecutorProcessControl object associated with this ExecutionSession.
Definition: Core.h:1416
virtual Expected< std::vector< tpctypes::LookupResult > > lookupSymbols(ArrayRef< LookupRequest > Request)=0
Search for symbols in the target process.
virtual Expected< tpctypes::DylibHandle > loadDylib(const char *DylibPath)=0
Load the dynamic library at the given path and return a handle to it.
Represents a JIT'd dynamic library.
Definition: Core.h:962
Error define(std::unique_ptr< MaterializationUnitType > &&MU, ResourceTrackerSP RT=nullptr)
Define all symbols provided by the materialization unit to be part of this JITDylib.
Definition: Core.h:1813
Wraps state for a lookup-in-progress.
Definition: Core.h:901
A set of symbols to look up, each associated with a SymbolLookupFlags value.
Definition: Core.h:180
UnderlyingVector::size_type size() const
Definition: Core.h:256
SymbolLookupSet & add(SymbolStringPtr Name, SymbolLookupFlags Flags=SymbolLookupFlags::RequiredSymbol)
Add an element to the set.
Definition: Core.h:241
std::unique_ptr< AbsoluteSymbolsMaterializationUnit > absoluteSymbols(SymbolMap Symbols)
Create an AbsoluteSymbolsMaterializationUnit with the given symbols.
Definition: Core.h:771
JITDylibLookupFlags
Lookup flags that apply to each dylib in the search order for a lookup.
Definition: Core.h:132
LookupKind
Describes the kind of lookup being performed.
Definition: Core.h:154
This is an optimization pass for GlobalISel generic memory operations.
Definition: AddressRanges.h:18
A pair of a dylib and a set of symbols to be looked up.