1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
|
//===---------- LazyReexports.cpp - Utilities for lazy reexports ----------===//
//
// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
// See https://llvm.org/LICENSE.txt for license information.
// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
//
//===----------------------------------------------------------------------===//
#include "llvm/ExecutionEngine/Orc/LazyReexports.h"
#include "llvm/ADT/Triple.h"
#include "llvm/ExecutionEngine/Orc/OrcABISupport.h"
#define DEBUG_TYPE "orc"
namespace llvm {
namespace orc {
LazyCallThroughManager::LazyCallThroughManager(
ExecutionSession &ES, JITTargetAddress ErrorHandlerAddr, TrampolinePool *TP)
: ES(ES), ErrorHandlerAddr(ErrorHandlerAddr), TP(TP) {}
Expected<JITTargetAddress> LazyCallThroughManager::getCallThroughTrampoline(
JITDylib &SourceJD, SymbolStringPtr SymbolName,
NotifyResolvedFunction NotifyResolved) {
assert(TP && "TrampolinePool not set");
std::lock_guard<std::mutex> Lock(LCTMMutex);
auto Trampoline = TP->getTrampoline();
if (!Trampoline)
return Trampoline.takeError();
Reexports[*Trampoline] = ReexportsEntry{&SourceJD, std::move(SymbolName)};
Notifiers[*Trampoline] = std::move(NotifyResolved);
return *Trampoline;
}
JITTargetAddress LazyCallThroughManager::reportCallThroughError(Error Err) {
ES.reportError(std::move(Err));
return ErrorHandlerAddr;
}
Expected<LazyCallThroughManager::ReexportsEntry>
LazyCallThroughManager::findReexport(JITTargetAddress TrampolineAddr) {
std::lock_guard<std::mutex> Lock(LCTMMutex);
auto I = Reexports.find(TrampolineAddr);
if (I == Reexports.end())
return createStringError(inconvertibleErrorCode(),
"Missing reexport for trampoline address %p",
TrampolineAddr);
return I->second;
}
Error LazyCallThroughManager::notifyResolved(JITTargetAddress TrampolineAddr,
JITTargetAddress ResolvedAddr) {
NotifyResolvedFunction NotifyResolved;
{
std::lock_guard<std::mutex> Lock(LCTMMutex);
auto I = Notifiers.find(TrampolineAddr);
if (I != Notifiers.end()) {
NotifyResolved = std::move(I->second);
Notifiers.erase(I);
}
}
return NotifyResolved ? NotifyResolved(ResolvedAddr) : Error::success();
}
void LazyCallThroughManager::resolveTrampolineLandingAddress(
JITTargetAddress TrampolineAddr,
NotifyLandingResolvedFunction NotifyLandingResolved) {
auto Entry = findReexport(TrampolineAddr);
if (!Entry)
return NotifyLandingResolved(reportCallThroughError(Entry.takeError()));
// Declaring SLS and the callback outside of the call to ES.lookup is a
// workaround to fix build failures on AIX and on z/OS platforms.
SymbolLookupSet SLS({Entry->SymbolName});
auto Callback = [this, TrampolineAddr, SymbolName = Entry->SymbolName,
NotifyLandingResolved = std::move(NotifyLandingResolved)](
Expected<SymbolMap> Result) mutable {
if (Result) {
assert(Result->size() == 1 && "Unexpected result size");
assert(Result->count(SymbolName) && "Unexpected result value");
JITTargetAddress LandingAddr = (*Result)[SymbolName].getAddress();
if (auto Err = notifyResolved(TrampolineAddr, LandingAddr))
NotifyLandingResolved(reportCallThroughError(std::move(Err)));
else
NotifyLandingResolved(LandingAddr);
} else {
NotifyLandingResolved(reportCallThroughError(Result.takeError()));
}
};
ES.lookup(LookupKind::Static,
makeJITDylibSearchOrder(Entry->SourceJD,
JITDylibLookupFlags::MatchAllSymbols),
std::move(SLS), SymbolState::Ready, std::move(Callback),
NoDependenciesToRegister);
}
Expected<std::unique_ptr<LazyCallThroughManager>>
createLocalLazyCallThroughManager(const Triple &T, ExecutionSession &ES,
JITTargetAddress ErrorHandlerAddr) {
switch (T.getArch()) {
default:
return make_error<StringError>(
std::string("No callback manager available for ") + T.str(),
inconvertibleErrorCode());
case Triple::aarch64:
case Triple::aarch64_32:
return LocalLazyCallThroughManager::Create<OrcAArch64>(ES,
ErrorHandlerAddr);
case Triple::x86:
return LocalLazyCallThroughManager::Create<OrcI386>(ES, ErrorHandlerAddr);
case Triple::mips:
return LocalLazyCallThroughManager::Create<OrcMips32Be>(ES,
ErrorHandlerAddr);
case Triple::mipsel:
return LocalLazyCallThroughManager::Create<OrcMips32Le>(ES,
ErrorHandlerAddr);
case Triple::mips64:
case Triple::mips64el:
return LocalLazyCallThroughManager::Create<OrcMips64>(ES, ErrorHandlerAddr);
case Triple::x86_64:
if (T.getOS() == Triple::OSType::Win32)
return LocalLazyCallThroughManager::Create<OrcX86_64_Win32>(
ES, ErrorHandlerAddr);
else
return LocalLazyCallThroughManager::Create<OrcX86_64_SysV>(
ES, ErrorHandlerAddr);
}
}
LazyReexportsMaterializationUnit::LazyReexportsMaterializationUnit(
LazyCallThroughManager &LCTManager, IndirectStubsManager &ISManager,
JITDylib &SourceJD, SymbolAliasMap CallableAliases, ImplSymbolMap *SrcJDLoc)
: MaterializationUnit(extractFlags(CallableAliases)),
LCTManager(LCTManager), ISManager(ISManager), SourceJD(SourceJD),
CallableAliases(std::move(CallableAliases)), AliaseeTable(SrcJDLoc) {}
StringRef LazyReexportsMaterializationUnit::getName() const {
return "<Lazy Reexports>";
}
void LazyReexportsMaterializationUnit::materialize(
std::unique_ptr<MaterializationResponsibility> R) {
auto RequestedSymbols = R->getRequestedSymbols();
SymbolAliasMap RequestedAliases;
for (auto &RequestedSymbol : RequestedSymbols) {
auto I = CallableAliases.find(RequestedSymbol);
assert(I != CallableAliases.end() && "Symbol not found in alias map?");
RequestedAliases[I->first] = std::move(I->second);
CallableAliases.erase(I);
}
if (!CallableAliases.empty())
if (auto Err = R->replace(lazyReexports(LCTManager, ISManager, SourceJD,
std::move(CallableAliases),
AliaseeTable))) {
R->getExecutionSession().reportError(std::move(Err));
R->failMaterialization();
return;
}
IndirectStubsManager::StubInitsMap StubInits;
for (auto &Alias : RequestedAliases) {
auto CallThroughTrampoline = LCTManager.getCallThroughTrampoline(
SourceJD, Alias.second.Aliasee,
[&ISManager = this->ISManager,
StubSym = Alias.first](JITTargetAddress ResolvedAddr) -> Error {
return ISManager.updatePointer(*StubSym, ResolvedAddr);
});
if (!CallThroughTrampoline) {
SourceJD.getExecutionSession().reportError(
CallThroughTrampoline.takeError());
R->failMaterialization();
return;
}
StubInits[*Alias.first] =
std::make_pair(*CallThroughTrampoline, Alias.second.AliasFlags);
}
if (AliaseeTable != nullptr && !RequestedAliases.empty())
AliaseeTable->trackImpls(RequestedAliases, &SourceJD);
if (auto Err = ISManager.createStubs(StubInits)) {
SourceJD.getExecutionSession().reportError(std::move(Err));
R->failMaterialization();
return;
}
SymbolMap Stubs;
for (auto &Alias : RequestedAliases)
Stubs[Alias.first] = ISManager.findStub(*Alias.first, false);
// No registered dependencies, so these calls cannot fail.
cantFail(R->notifyResolved(Stubs));
cantFail(R->notifyEmitted());
}
void LazyReexportsMaterializationUnit::discard(const JITDylib &JD,
const SymbolStringPtr &Name) {
assert(CallableAliases.count(Name) &&
"Symbol not covered by this MaterializationUnit");
CallableAliases.erase(Name);
}
MaterializationUnit::Interface
LazyReexportsMaterializationUnit::extractFlags(const SymbolAliasMap &Aliases) {
SymbolFlagsMap SymbolFlags;
for (auto &KV : Aliases) {
assert(KV.second.AliasFlags.isCallable() &&
"Lazy re-exports must be callable symbols");
SymbolFlags[KV.first] = KV.second.AliasFlags;
}
return MaterializationUnit::Interface(std::move(SymbolFlags), nullptr);
}
} // End namespace orc.
} // End namespace llvm.
|
