1 //===------ SelfExecutorProcessControl.cpp -- EPC for in-process JITs -----===//
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 #include "llvm/ExecutionEngine/Orc/SelfExecutorProcessControl.h"
10
11 #include "llvm/ExecutionEngine/Orc/Core.h"
12 #include "llvm/ExecutionEngine/Orc/TargetProcess/DefaultHostBootstrapValues.h"
13 #include "llvm/ExecutionEngine/Orc/TargetProcess/TargetExecutionUtils.h"
14 #include "llvm/Support/DynamicLibrary.h"
15 #include "llvm/Support/Process.h"
16 #include "llvm/TargetParser/Host.h"
17
18 #define DEBUG_TYPE "orc"
19
20 namespace llvm::orc {
21
SelfExecutorProcessControl(std::shared_ptr<SymbolStringPool> SSP,std::unique_ptr<TaskDispatcher> D,Triple TargetTriple,unsigned PageSize,std::unique_ptr<jitlink::JITLinkMemoryManager> MemMgr)22 SelfExecutorProcessControl::SelfExecutorProcessControl(
23 std::shared_ptr<SymbolStringPool> SSP, std::unique_ptr<TaskDispatcher> D,
24 Triple TargetTriple, unsigned PageSize,
25 std::unique_ptr<jitlink::JITLinkMemoryManager> MemMgr)
26 : ExecutorProcessControl(std::move(SSP), std::move(D)),
27 IPMA(TargetTriple.isArch64Bit()) {
28
29 OwnedMemMgr = std::move(MemMgr);
30 if (!OwnedMemMgr)
31 OwnedMemMgr = std::make_unique<jitlink::InProcessMemoryManager>(
32 sys::Process::getPageSizeEstimate());
33
34 this->TargetTriple = std::move(TargetTriple);
35 this->PageSize = PageSize;
36 this->MemMgr = OwnedMemMgr.get();
37 this->MemAccess = &IPMA;
38 this->DylibMgr = this;
39 this->JDI = {ExecutorAddr::fromPtr(jitDispatchViaWrapperFunctionManager),
40 ExecutorAddr::fromPtr(this)};
41
42 if (this->TargetTriple.isOSBinFormatMachO())
43 GlobalManglingPrefix = '_';
44
45 addDefaultBootstrapValuesForHostProcess(BootstrapMap, BootstrapSymbols);
46
47 #ifdef __APPLE__
48 // FIXME: Don't add an UnwindInfoManager by default -- it's redundant when
49 // the ORC runtime is loaded. We'll need a way to document this and
50 // allow clients to choose.
51 if (UnwindInfoManager::TryEnable())
52 UnwindInfoManager::addBootstrapSymbols(this->BootstrapSymbols);
53 #endif // __APPLE__
54 }
55
56 Expected<std::unique_ptr<SelfExecutorProcessControl>>
Create(std::shared_ptr<SymbolStringPool> SSP,std::unique_ptr<TaskDispatcher> D,std::unique_ptr<jitlink::JITLinkMemoryManager> MemMgr)57 SelfExecutorProcessControl::Create(
58 std::shared_ptr<SymbolStringPool> SSP, std::unique_ptr<TaskDispatcher> D,
59 std::unique_ptr<jitlink::JITLinkMemoryManager> MemMgr) {
60
61 if (!SSP)
62 SSP = std::make_shared<SymbolStringPool>();
63
64 if (!D)
65 D = std::make_unique<InPlaceTaskDispatcher>();
66
67 auto PageSize = sys::Process::getPageSize();
68 if (!PageSize)
69 return PageSize.takeError();
70
71 Triple TT(sys::getProcessTriple());
72
73 return std::make_unique<SelfExecutorProcessControl>(
74 std::move(SSP), std::move(D), std::move(TT), *PageSize,
75 std::move(MemMgr));
76 }
77
78 Expected<tpctypes::DylibHandle>
loadDylib(const char * DylibPath)79 SelfExecutorProcessControl::loadDylib(const char *DylibPath) {
80 std::string ErrMsg;
81 auto Dylib = sys::DynamicLibrary::getPermanentLibrary(DylibPath, &ErrMsg);
82 if (!Dylib.isValid())
83 return make_error<StringError>(std::move(ErrMsg), inconvertibleErrorCode());
84 return ExecutorAddr::fromPtr(Dylib.getOSSpecificHandle());
85 }
86
lookupSymbolsAsync(ArrayRef<LookupRequest> Request,DylibManager::SymbolLookupCompleteFn Complete)87 void SelfExecutorProcessControl::lookupSymbolsAsync(
88 ArrayRef<LookupRequest> Request,
89 DylibManager::SymbolLookupCompleteFn Complete) {
90 std::vector<tpctypes::LookupResult> R;
91
92 for (auto &Elem : Request) {
93 sys::DynamicLibrary Dylib(Elem.Handle.toPtr<void *>());
94 R.push_back(std::vector<ExecutorSymbolDef>());
95 for (auto &KV : Elem.Symbols) {
96 auto &Sym = KV.first;
97 std::string Tmp((*Sym).data() + !!GlobalManglingPrefix,
98 (*Sym).size() - !!GlobalManglingPrefix);
99 void *Addr = Dylib.getAddressOfSymbol(Tmp.c_str());
100 if (!Addr && KV.second == SymbolLookupFlags::RequiredSymbol) {
101 // FIXME: Collect all failing symbols before erroring out.
102 SymbolNameVector MissingSymbols;
103 MissingSymbols.push_back(Sym);
104 return Complete(
105 make_error<SymbolsNotFound>(SSP, std::move(MissingSymbols)));
106 }
107 // FIXME: determine accurate JITSymbolFlags.
108 R.back().push_back(
109 {ExecutorAddr::fromPtr(Addr), JITSymbolFlags::Exported});
110 }
111 }
112
113 Complete(std::move(R));
114 }
115
116 Expected<int32_t>
runAsMain(ExecutorAddr MainFnAddr,ArrayRef<std::string> Args)117 SelfExecutorProcessControl::runAsMain(ExecutorAddr MainFnAddr,
118 ArrayRef<std::string> Args) {
119 using MainTy = int (*)(int, char *[]);
120 return orc::runAsMain(MainFnAddr.toPtr<MainTy>(), Args);
121 }
122
123 Expected<int32_t>
runAsVoidFunction(ExecutorAddr VoidFnAddr)124 SelfExecutorProcessControl::runAsVoidFunction(ExecutorAddr VoidFnAddr) {
125 using VoidTy = int (*)();
126 return orc::runAsVoidFunction(VoidFnAddr.toPtr<VoidTy>());
127 }
128
129 Expected<int32_t>
runAsIntFunction(ExecutorAddr IntFnAddr,int Arg)130 SelfExecutorProcessControl::runAsIntFunction(ExecutorAddr IntFnAddr, int Arg) {
131 using IntTy = int (*)(int);
132 return orc::runAsIntFunction(IntFnAddr.toPtr<IntTy>(), Arg);
133 }
134
callWrapperAsync(ExecutorAddr WrapperFnAddr,IncomingWFRHandler SendResult,ArrayRef<char> ArgBuffer)135 void SelfExecutorProcessControl::callWrapperAsync(ExecutorAddr WrapperFnAddr,
136 IncomingWFRHandler SendResult,
137 ArrayRef<char> ArgBuffer) {
138 using WrapperFnTy =
139 shared::CWrapperFunctionResult (*)(const char *Data, size_t Size);
140 auto *WrapperFn = WrapperFnAddr.toPtr<WrapperFnTy>();
141 SendResult(WrapperFn(ArgBuffer.data(), ArgBuffer.size()));
142 }
143
disconnect()144 Error SelfExecutorProcessControl::disconnect() {
145 D->shutdown();
146 return Error::success();
147 }
148
149 shared::CWrapperFunctionResult
jitDispatchViaWrapperFunctionManager(void * Ctx,const void * FnTag,const char * Data,size_t Size)150 SelfExecutorProcessControl::jitDispatchViaWrapperFunctionManager(
151 void *Ctx, const void *FnTag, const char *Data, size_t Size) {
152
153 LLVM_DEBUG({
154 dbgs() << "jit-dispatch call with tag " << FnTag << " and " << Size
155 << " byte payload.\n";
156 });
157
158 std::promise<shared::WrapperFunctionResult> ResultP;
159 auto ResultF = ResultP.get_future();
160 static_cast<SelfExecutorProcessControl *>(Ctx)
161 ->getExecutionSession()
162 .runJITDispatchHandler(
163 [ResultP = std::move(ResultP)](
164 shared::WrapperFunctionResult Result) mutable {
165 ResultP.set_value(std::move(Result));
166 },
167 ExecutorAddr::fromPtr(FnTag), {Data, Size});
168
169 return ResultF.get().release();
170 }
171
172 } // namespace llvm::orc
173