1 //===- coff_platform.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 //
9 // This file contains code required to load the rest of the COFF runtime.
10 //
11 //===----------------------------------------------------------------------===//
12
13 #define NOMINMAX
14 #include <windows.h>
15
16 #include "coff_platform.h"
17
18 #include "debug.h"
19 #include "error.h"
20 #include "wrapper_function_utils.h"
21
22 #include <array>
23 #include <list>
24 #include <map>
25 #include <mutex>
26 #include <sstream>
27 #include <string_view>
28 #include <vector>
29
30 #define DEBUG_TYPE "coff_platform"
31
32 using namespace __orc_rt;
33
34 namespace __orc_rt {
35
36 using COFFJITDylibDepInfo = std::vector<ExecutorAddr>;
37 using COFFJITDylibDepInfoMap =
38 std::unordered_map<ExecutorAddr, COFFJITDylibDepInfo>;
39
40 using SPSCOFFObjectSectionsMap =
41 SPSSequence<SPSTuple<SPSString, SPSExecutorAddrRange>>;
42
43 using SPSCOFFJITDylibDepInfo = SPSSequence<SPSExecutorAddr>;
44
45 using SPSCOFFJITDylibDepInfoMap =
46 SPSSequence<SPSTuple<SPSExecutorAddr, SPSCOFFJITDylibDepInfo>>;
47
48 } // namespace __orc_rt
49
50 ORC_RT_JIT_DISPATCH_TAG(__orc_rt_coff_symbol_lookup_tag)
51 ORC_RT_JIT_DISPATCH_TAG(__orc_rt_coff_push_initializers_tag)
52
53 namespace {
54 class COFFPlatformRuntimeState {
55 private:
56 // Ctor/dtor section.
57 // Manage lists of *tor functions sorted by the last character of subsection
58 // name.
59 struct XtorSection {
Register__anonfa8b6d800111::COFFPlatformRuntimeState::XtorSection60 void Register(char SubsectionChar, span<void (*)(void)> Xtors) {
61 Subsections[SubsectionChar - 'A'].push_back(Xtors);
62 SubsectionsNew[SubsectionChar - 'A'].push_back(Xtors);
63 }
64
RegisterNoRun__anonfa8b6d800111::COFFPlatformRuntimeState::XtorSection65 void RegisterNoRun(char SubsectionChar, span<void (*)(void)> Xtors) {
66 Subsections[SubsectionChar - 'A'].push_back(Xtors);
67 }
68
Reset__anonfa8b6d800111::COFFPlatformRuntimeState::XtorSection69 void Reset() { SubsectionsNew = Subsections; }
70
71 void RunAllNewAndFlush();
72
73 private:
74 std::array<std::vector<span<void (*)(void)>>, 26> Subsections;
75 std::array<std::vector<span<void (*)(void)>>, 26> SubsectionsNew;
76 };
77
78 struct JITDylibState {
79 std::string Name;
80 void *Header = nullptr;
81 size_t LinkedAgainstRefCount = 0;
82 size_t DlRefCount = 0;
83 std::vector<JITDylibState *> Deps;
84 std::vector<void (*)(void)> AtExits;
85 XtorSection CInitSection; // XIA~XIZ
86 XtorSection CXXInitSection; // XCA~XCZ
87 XtorSection CPreTermSection; // XPA~XPZ
88 XtorSection CTermSection; // XTA~XTZ
89
referenced__anonfa8b6d800111::COFFPlatformRuntimeState::JITDylibState90 bool referenced() const {
91 return LinkedAgainstRefCount != 0 || DlRefCount != 0;
92 }
93 };
94
95 public:
96 static void initialize();
97 static COFFPlatformRuntimeState &get();
isInitialized()98 static bool isInitialized() { return CPS; }
99 static void destroy();
100
101 COFFPlatformRuntimeState() = default;
102
103 // Delete copy and move constructors.
104 COFFPlatformRuntimeState(const COFFPlatformRuntimeState &) = delete;
105 COFFPlatformRuntimeState &
106 operator=(const COFFPlatformRuntimeState &) = delete;
107 COFFPlatformRuntimeState(COFFPlatformRuntimeState &&) = delete;
108 COFFPlatformRuntimeState &operator=(COFFPlatformRuntimeState &&) = delete;
109
110 const char *dlerror();
111 void *dlopen(std::string_view Name, int Mode);
112 int dlclose(void *Header);
113 void *dlsym(void *Header, std::string_view Symbol);
114
115 Error registerJITDylib(std::string Name, void *Header);
116 Error deregisterJITDylib(void *Header);
117
118 Error registerAtExit(ExecutorAddr HeaderAddr, void (*AtExit)(void));
119
120 Error registerObjectSections(
121 ExecutorAddr HeaderAddr,
122 std::vector<std::pair<std::string_view, ExecutorAddrRange>> Secs,
123 bool RunInitializers);
124 Error deregisterObjectSections(
125 ExecutorAddr HeaderAddr,
126 std::vector<std::pair<std::string_view, ExecutorAddrRange>> Secs);
127
128 void *findJITDylibBaseByPC(uint64_t PC);
129
130 private:
131 Error registerBlockRange(ExecutorAddr HeaderAddr, ExecutorAddrRange Range);
132 Error deregisterBlockRange(ExecutorAddr HeaderAddr, ExecutorAddrRange Range);
133
134 Error registerSEHFrames(ExecutorAddr HeaderAddr,
135 ExecutorAddrRange SEHFrameRange);
136 Error deregisterSEHFrames(ExecutorAddr HeaderAddr,
137 ExecutorAddrRange SEHFrameRange);
138
139 Expected<void *> dlopenImpl(std::string_view Path, int Mode);
140 Error dlopenFull(JITDylibState &JDS);
141 Error dlopenInitialize(JITDylibState &JDS, COFFJITDylibDepInfoMap &DepInfo);
142
143 Error dlcloseImpl(void *DSOHandle);
144 Error dlcloseDeinitialize(JITDylibState &JDS);
145
146 JITDylibState *getJITDylibStateByHeader(void *DSOHandle);
147 JITDylibState *getJITDylibStateByName(std::string_view Path);
148 Expected<ExecutorAddr> lookupSymbolInJITDylib(void *DSOHandle,
149 std::string_view Symbol);
150
151 static COFFPlatformRuntimeState *CPS;
152
153 std::recursive_mutex JDStatesMutex;
154 std::map<void *, JITDylibState> JDStates;
155 struct BlockRange {
156 void *Header;
157 size_t Size;
158 };
159 std::map<void *, BlockRange> BlockRanges;
160 std::unordered_map<std::string_view, void *> JDNameToHeader;
161 std::string DLFcnError;
162 };
163
164 } // namespace
165
166 COFFPlatformRuntimeState *COFFPlatformRuntimeState::CPS = nullptr;
167
168 COFFPlatformRuntimeState::JITDylibState *
getJITDylibStateByHeader(void * Header)169 COFFPlatformRuntimeState::getJITDylibStateByHeader(void *Header) {
170 auto I = JDStates.find(Header);
171 if (I == JDStates.end())
172 return nullptr;
173 return &I->second;
174 }
175
176 COFFPlatformRuntimeState::JITDylibState *
getJITDylibStateByName(std::string_view Name)177 COFFPlatformRuntimeState::getJITDylibStateByName(std::string_view Name) {
178 // FIXME: Avoid creating string copy here.
179 auto I = JDNameToHeader.find(std::string(Name.data(), Name.size()));
180 if (I == JDNameToHeader.end())
181 return nullptr;
182 void *H = I->second;
183 auto J = JDStates.find(H);
184 assert(J != JDStates.end() &&
185 "JITDylib has name map entry but no header map entry");
186 return &J->second;
187 }
188
registerJITDylib(std::string Name,void * Header)189 Error COFFPlatformRuntimeState::registerJITDylib(std::string Name,
190 void *Header) {
191 ORC_RT_DEBUG({
192 printdbg("Registering JITDylib %s: Header = %p\n", Name.c_str(), Header);
193 });
194 std::lock_guard<std::recursive_mutex> Lock(JDStatesMutex);
195 if (JDStates.count(Header)) {
196 std::ostringstream ErrStream;
197 ErrStream << "Duplicate JITDylib registration for header " << Header
198 << " (name = " << Name << ")";
199 return make_error<StringError>(ErrStream.str());
200 }
201 if (JDNameToHeader.count(Name)) {
202 std::ostringstream ErrStream;
203 ErrStream << "Duplicate JITDylib registration for header " << Header
204 << " (header = " << Header << ")";
205 return make_error<StringError>(ErrStream.str());
206 }
207
208 auto &JDS = JDStates[Header];
209 JDS.Name = std::move(Name);
210 JDS.Header = Header;
211 JDNameToHeader[JDS.Name] = Header;
212 return Error::success();
213 }
214
deregisterJITDylib(void * Header)215 Error COFFPlatformRuntimeState::deregisterJITDylib(void *Header) {
216 std::lock_guard<std::recursive_mutex> Lock(JDStatesMutex);
217 auto I = JDStates.find(Header);
218 if (I == JDStates.end()) {
219 std::ostringstream ErrStream;
220 ErrStream << "Attempted to deregister unrecognized header " << Header;
221 return make_error<StringError>(ErrStream.str());
222 }
223
224 // Remove std::string construction once we can use C++20.
225 auto J = JDNameToHeader.find(
226 std::string(I->second.Name.data(), I->second.Name.size()));
227 assert(J != JDNameToHeader.end() &&
228 "Missing JDNameToHeader entry for JITDylib");
229
230 ORC_RT_DEBUG({
231 printdbg("Deregistering JITDylib %s: Header = %p\n", I->second.Name.c_str(),
232 Header);
233 });
234
235 JDNameToHeader.erase(J);
236 JDStates.erase(I);
237 return Error::success();
238 }
239
RunAllNewAndFlush()240 void COFFPlatformRuntimeState::XtorSection::RunAllNewAndFlush() {
241 for (auto &Subsection : SubsectionsNew) {
242 for (auto &XtorGroup : Subsection)
243 for (auto &Xtor : XtorGroup)
244 if (Xtor)
245 Xtor();
246 Subsection.clear();
247 }
248 }
249
dlerror()250 const char *COFFPlatformRuntimeState::dlerror() { return DLFcnError.c_str(); }
251
dlopen(std::string_view Path,int Mode)252 void *COFFPlatformRuntimeState::dlopen(std::string_view Path, int Mode) {
253 ORC_RT_DEBUG({
254 std::string S(Path.data(), Path.size());
255 printdbg("COFFPlatform::dlopen(\"%s\")\n", S.c_str());
256 });
257 std::lock_guard<std::recursive_mutex> Lock(JDStatesMutex);
258 if (auto H = dlopenImpl(Path, Mode))
259 return *H;
260 else {
261 // FIXME: Make dlerror thread safe.
262 DLFcnError = toString(H.takeError());
263 return nullptr;
264 }
265 }
266
dlclose(void * DSOHandle)267 int COFFPlatformRuntimeState::dlclose(void *DSOHandle) {
268 ORC_RT_DEBUG({
269 auto *JDS = getJITDylibStateByHeader(DSOHandle);
270 std::string DylibName;
271 if (JDS) {
272 std::string S;
273 printdbg("COFFPlatform::dlclose(%p) (%s)\n", DSOHandle, S.c_str());
274 } else
275 printdbg("COFFPlatform::dlclose(%p) (%s)\n", DSOHandle, "invalid handle");
276 });
277 std::lock_guard<std::recursive_mutex> Lock(JDStatesMutex);
278 if (auto Err = dlcloseImpl(DSOHandle)) {
279 // FIXME: Make dlerror thread safe.
280 DLFcnError = toString(std::move(Err));
281 return -1;
282 }
283 return 0;
284 }
285
dlsym(void * Header,std::string_view Symbol)286 void *COFFPlatformRuntimeState::dlsym(void *Header, std::string_view Symbol) {
287 auto Addr = lookupSymbolInJITDylib(Header, Symbol);
288 if (!Addr) {
289 return 0;
290 }
291
292 return Addr->toPtr<void *>();
293 }
294
dlopenImpl(std::string_view Path,int Mode)295 Expected<void *> COFFPlatformRuntimeState::dlopenImpl(std::string_view Path,
296 int Mode) {
297 // Try to find JITDylib state by name.
298 auto *JDS = getJITDylibStateByName(Path);
299
300 if (!JDS)
301 return make_error<StringError>("No registered JTIDylib for path " +
302 std::string(Path.data(), Path.size()));
303
304 if (auto Err = dlopenFull(*JDS))
305 return std::move(Err);
306
307 // Bump the ref-count on this dylib.
308 ++JDS->DlRefCount;
309
310 // Return the header address.
311 return JDS->Header;
312 }
313
dlopenFull(JITDylibState & JDS)314 Error COFFPlatformRuntimeState::dlopenFull(JITDylibState &JDS) {
315 // Call back to the JIT to push the initializers.
316 Expected<COFFJITDylibDepInfoMap> DepInfoMap((COFFJITDylibDepInfoMap()));
317 if (auto Err = WrapperFunction<SPSExpected<SPSCOFFJITDylibDepInfoMap>(
318 SPSExecutorAddr)>::call(&__orc_rt_coff_push_initializers_tag,
319 DepInfoMap,
320 ExecutorAddr::fromPtr(JDS.Header)))
321 return Err;
322 if (!DepInfoMap)
323 return DepInfoMap.takeError();
324
325 if (auto Err = dlopenInitialize(JDS, *DepInfoMap))
326 return Err;
327
328 if (!DepInfoMap->empty()) {
329 ORC_RT_DEBUG({
330 printdbg("Unrecognized dep-info key headers in dlopen of %s\n",
331 JDS.Name.c_str());
332 });
333 std::ostringstream ErrStream;
334 ErrStream << "Encountered unrecognized dep-info key headers "
335 "while processing dlopen of "
336 << JDS.Name;
337 return make_error<StringError>(ErrStream.str());
338 }
339
340 return Error::success();
341 }
342
dlopenInitialize(JITDylibState & JDS,COFFJITDylibDepInfoMap & DepInfo)343 Error COFFPlatformRuntimeState::dlopenInitialize(
344 JITDylibState &JDS, COFFJITDylibDepInfoMap &DepInfo) {
345 ORC_RT_DEBUG({
346 printdbg("COFFPlatformRuntimeState::dlopenInitialize(\"%s\")\n",
347 JDS.Name.c_str());
348 });
349
350 // Skip visited dependency.
351 auto I = DepInfo.find(ExecutorAddr::fromPtr(JDS.Header));
352 if (I == DepInfo.end())
353 return Error::success();
354
355 auto DI = std::move(I->second);
356 DepInfo.erase(I);
357
358 // Run initializers of dependencies in proper order by depth-first traversal
359 // of dependency graph.
360 std::vector<JITDylibState *> OldDeps;
361 std::swap(JDS.Deps, OldDeps);
362 JDS.Deps.reserve(DI.size());
363 for (auto DepHeaderAddr : DI) {
364 auto *DepJDS = getJITDylibStateByHeader(DepHeaderAddr.toPtr<void *>());
365 if (!DepJDS) {
366 std::ostringstream ErrStream;
367 ErrStream << "Encountered unrecognized dep header "
368 << DepHeaderAddr.toPtr<void *>() << " while initializing "
369 << JDS.Name;
370 return make_error<StringError>(ErrStream.str());
371 }
372 ++DepJDS->LinkedAgainstRefCount;
373 if (auto Err = dlopenInitialize(*DepJDS, DepInfo))
374 return Err;
375 }
376
377 // Run static initializers.
378 JDS.CInitSection.RunAllNewAndFlush();
379 JDS.CXXInitSection.RunAllNewAndFlush();
380
381 // Decrement old deps.
382 for (auto *DepJDS : OldDeps) {
383 --DepJDS->LinkedAgainstRefCount;
384 if (!DepJDS->referenced())
385 if (auto Err = dlcloseDeinitialize(*DepJDS))
386 return Err;
387 }
388
389 return Error::success();
390 }
391
dlcloseImpl(void * DSOHandle)392 Error COFFPlatformRuntimeState::dlcloseImpl(void *DSOHandle) {
393 // Try to find JITDylib state by header.
394 auto *JDS = getJITDylibStateByHeader(DSOHandle);
395
396 if (!JDS) {
397 std::ostringstream ErrStream;
398 ErrStream << "No registered JITDylib for " << DSOHandle;
399 return make_error<StringError>(ErrStream.str());
400 }
401
402 // Bump the ref-count.
403 --JDS->DlRefCount;
404
405 if (!JDS->referenced())
406 return dlcloseDeinitialize(*JDS);
407
408 return Error::success();
409 }
410
dlcloseDeinitialize(JITDylibState & JDS)411 Error COFFPlatformRuntimeState::dlcloseDeinitialize(JITDylibState &JDS) {
412 ORC_RT_DEBUG({
413 printdbg("COFFPlatformRuntimeState::dlcloseDeinitialize(\"%s\")\n",
414 JDS.Name.c_str());
415 });
416
417 // Run atexits
418 for (auto AtExit : JDS.AtExits)
419 AtExit();
420 JDS.AtExits.clear();
421
422 // Run static terminators.
423 JDS.CPreTermSection.RunAllNewAndFlush();
424 JDS.CTermSection.RunAllNewAndFlush();
425
426 // Queue all xtors as new again.
427 JDS.CInitSection.Reset();
428 JDS.CXXInitSection.Reset();
429 JDS.CPreTermSection.Reset();
430 JDS.CTermSection.Reset();
431
432 // Deinitialize any dependencies.
433 for (auto *DepJDS : JDS.Deps) {
434 --DepJDS->LinkedAgainstRefCount;
435 if (!DepJDS->referenced())
436 if (auto Err = dlcloseDeinitialize(*DepJDS))
437 return Err;
438 }
439
440 return Error::success();
441 }
442
443 Expected<ExecutorAddr>
lookupSymbolInJITDylib(void * header,std::string_view Sym)444 COFFPlatformRuntimeState::lookupSymbolInJITDylib(void *header,
445 std::string_view Sym) {
446 Expected<ExecutorAddr> Result((ExecutorAddr()));
447 if (auto Err = WrapperFunction<SPSExpected<SPSExecutorAddr>(
448 SPSExecutorAddr, SPSString)>::call(&__orc_rt_coff_symbol_lookup_tag,
449 Result,
450 ExecutorAddr::fromPtr(header),
451 Sym))
452 return std::move(Err);
453 return Result;
454 }
455
registerObjectSections(ExecutorAddr HeaderAddr,std::vector<std::pair<std::string_view,ExecutorAddrRange>> Secs,bool RunInitializers)456 Error COFFPlatformRuntimeState::registerObjectSections(
457 ExecutorAddr HeaderAddr,
458 std::vector<std::pair<std::string_view, ExecutorAddrRange>> Secs,
459 bool RunInitializers) {
460 std::lock_guard<std::recursive_mutex> Lock(JDStatesMutex);
461 auto I = JDStates.find(HeaderAddr.toPtr<void *>());
462 if (I == JDStates.end()) {
463 std::ostringstream ErrStream;
464 ErrStream << "Unrecognized header " << HeaderAddr.getValue();
465 return make_error<StringError>(ErrStream.str());
466 }
467 auto &JDState = I->second;
468 for (auto &KV : Secs) {
469 if (auto Err = registerBlockRange(HeaderAddr, KV.second))
470 return Err;
471 if (KV.first.empty())
472 continue;
473 char LastChar = KV.first.data()[KV.first.size() - 1];
474 if (KV.first == ".pdata") {
475 if (auto Err = registerSEHFrames(HeaderAddr, KV.second))
476 return Err;
477 } else if (KV.first >= ".CRT$XIA" && KV.first <= ".CRT$XIZ") {
478 if (RunInitializers)
479 JDState.CInitSection.Register(LastChar,
480 KV.second.toSpan<void (*)(void)>());
481 else
482 JDState.CInitSection.RegisterNoRun(LastChar,
483 KV.second.toSpan<void (*)(void)>());
484 } else if (KV.first >= ".CRT$XCA" && KV.first <= ".CRT$XCZ") {
485 if (RunInitializers)
486 JDState.CXXInitSection.Register(LastChar,
487 KV.second.toSpan<void (*)(void)>());
488 else
489 JDState.CXXInitSection.RegisterNoRun(
490 LastChar, KV.second.toSpan<void (*)(void)>());
491 } else if (KV.first >= ".CRT$XPA" && KV.first <= ".CRT$XPZ")
492 JDState.CPreTermSection.Register(LastChar,
493 KV.second.toSpan<void (*)(void)>());
494 else if (KV.first >= ".CRT$XTA" && KV.first <= ".CRT$XTZ")
495 JDState.CTermSection.Register(LastChar,
496 KV.second.toSpan<void (*)(void)>());
497 }
498 return Error::success();
499 }
500
deregisterObjectSections(ExecutorAddr HeaderAddr,std::vector<std::pair<std::string_view,ExecutorAddrRange>> Secs)501 Error COFFPlatformRuntimeState::deregisterObjectSections(
502 ExecutorAddr HeaderAddr,
503 std::vector<std::pair<std::string_view, ExecutorAddrRange>> Secs) {
504 std::lock_guard<std::recursive_mutex> Lock(JDStatesMutex);
505 auto I = JDStates.find(HeaderAddr.toPtr<void *>());
506 if (I == JDStates.end()) {
507 std::ostringstream ErrStream;
508 ErrStream << "Attempted to deregister unrecognized header "
509 << HeaderAddr.getValue();
510 return make_error<StringError>(ErrStream.str());
511 }
512 for (auto &KV : Secs) {
513 if (auto Err = deregisterBlockRange(HeaderAddr, KV.second))
514 return Err;
515 if (KV.first == ".pdata")
516 if (auto Err = deregisterSEHFrames(HeaderAddr, KV.second))
517 return Err;
518 }
519 return Error::success();
520 }
521
registerSEHFrames(ExecutorAddr HeaderAddr,ExecutorAddrRange SEHFrameRange)522 Error COFFPlatformRuntimeState::registerSEHFrames(
523 ExecutorAddr HeaderAddr, ExecutorAddrRange SEHFrameRange) {
524 int N = (SEHFrameRange.End.getValue() - SEHFrameRange.Start.getValue()) /
525 sizeof(RUNTIME_FUNCTION);
526 auto Func = SEHFrameRange.Start.toPtr<PRUNTIME_FUNCTION>();
527 if (!RtlAddFunctionTable(Func, N,
528 static_cast<DWORD64>(HeaderAddr.getValue())))
529 return make_error<StringError>("Failed to register SEH frames");
530 return Error::success();
531 }
532
deregisterSEHFrames(ExecutorAddr HeaderAddr,ExecutorAddrRange SEHFrameRange)533 Error COFFPlatformRuntimeState::deregisterSEHFrames(
534 ExecutorAddr HeaderAddr, ExecutorAddrRange SEHFrameRange) {
535 if (!RtlDeleteFunctionTable(SEHFrameRange.Start.toPtr<PRUNTIME_FUNCTION>()))
536 return make_error<StringError>("Failed to deregister SEH frames");
537 return Error::success();
538 }
539
registerBlockRange(ExecutorAddr HeaderAddr,ExecutorAddrRange Range)540 Error COFFPlatformRuntimeState::registerBlockRange(ExecutorAddr HeaderAddr,
541 ExecutorAddrRange Range) {
542 assert(!BlockRanges.count(Range.Start.toPtr<void *>()) &&
543 "Block range address already registered");
544 BlockRange B = {HeaderAddr.toPtr<void *>(), Range.size()};
545 BlockRanges.emplace(Range.Start.toPtr<void *>(), B);
546 return Error::success();
547 }
548
deregisterBlockRange(ExecutorAddr HeaderAddr,ExecutorAddrRange Range)549 Error COFFPlatformRuntimeState::deregisterBlockRange(ExecutorAddr HeaderAddr,
550 ExecutorAddrRange Range) {
551 assert(BlockRanges.count(Range.Start.toPtr<void *>()) &&
552 "Block range address not registered");
553 BlockRanges.erase(Range.Start.toPtr<void *>());
554 return Error::success();
555 }
556
registerAtExit(ExecutorAddr HeaderAddr,void (* AtExit)(void))557 Error COFFPlatformRuntimeState::registerAtExit(ExecutorAddr HeaderAddr,
558 void (*AtExit)(void)) {
559 std::lock_guard<std::recursive_mutex> Lock(JDStatesMutex);
560 auto I = JDStates.find(HeaderAddr.toPtr<void *>());
561 if (I == JDStates.end()) {
562 std::ostringstream ErrStream;
563 ErrStream << "Unrecognized header " << HeaderAddr.getValue();
564 return make_error<StringError>(ErrStream.str());
565 }
566 I->second.AtExits.push_back(AtExit);
567 return Error::success();
568 }
569
initialize()570 void COFFPlatformRuntimeState::initialize() {
571 assert(!CPS && "COFFPlatformRuntimeState should be null");
572 CPS = new COFFPlatformRuntimeState();
573 }
574
get()575 COFFPlatformRuntimeState &COFFPlatformRuntimeState::get() {
576 assert(CPS && "COFFPlatformRuntimeState not initialized");
577 return *CPS;
578 }
579
destroy()580 void COFFPlatformRuntimeState::destroy() {
581 assert(CPS && "COFFPlatformRuntimeState not initialized");
582 delete CPS;
583 }
584
findJITDylibBaseByPC(uint64_t PC)585 void *COFFPlatformRuntimeState::findJITDylibBaseByPC(uint64_t PC) {
586 std::lock_guard<std::recursive_mutex> Lock(JDStatesMutex);
587 auto It = BlockRanges.upper_bound(reinterpret_cast<void *>(PC));
588 if (It == BlockRanges.begin())
589 return nullptr;
590 --It;
591 auto &Range = It->second;
592 if (PC >= reinterpret_cast<uint64_t>(It->first) + Range.Size)
593 return nullptr;
594 return Range.Header;
595 }
596
597 ORC_RT_INTERFACE orc_rt_CWrapperFunctionResult
__orc_rt_coff_platform_bootstrap(char * ArgData,size_t ArgSize)598 __orc_rt_coff_platform_bootstrap(char *ArgData, size_t ArgSize) {
599 COFFPlatformRuntimeState::initialize();
600 return WrapperFunctionResult().release();
601 }
602
603 ORC_RT_INTERFACE orc_rt_CWrapperFunctionResult
__orc_rt_coff_platform_shutdown(char * ArgData,size_t ArgSize)604 __orc_rt_coff_platform_shutdown(char *ArgData, size_t ArgSize) {
605 COFFPlatformRuntimeState::destroy();
606 return WrapperFunctionResult().release();
607 }
608
609 ORC_RT_INTERFACE orc_rt_CWrapperFunctionResult
__orc_rt_coff_register_jitdylib(char * ArgData,size_t ArgSize)610 __orc_rt_coff_register_jitdylib(char *ArgData, size_t ArgSize) {
611 return WrapperFunction<SPSError(SPSString, SPSExecutorAddr)>::handle(
612 ArgData, ArgSize,
613 [](std::string &Name, ExecutorAddr HeaderAddr) {
614 return COFFPlatformRuntimeState::get().registerJITDylib(
615 std::move(Name), HeaderAddr.toPtr<void *>());
616 })
617 .release();
618 }
619
620 ORC_RT_INTERFACE orc_rt_CWrapperFunctionResult
__orc_rt_coff_deregister_jitdylib(char * ArgData,size_t ArgSize)621 __orc_rt_coff_deregister_jitdylib(char *ArgData, size_t ArgSize) {
622 return WrapperFunction<SPSError(SPSExecutorAddr)>::handle(
623 ArgData, ArgSize,
624 [](ExecutorAddr HeaderAddr) {
625 return COFFPlatformRuntimeState::get().deregisterJITDylib(
626 HeaderAddr.toPtr<void *>());
627 })
628 .release();
629 }
630
631 ORC_RT_INTERFACE orc_rt_CWrapperFunctionResult
__orc_rt_coff_register_object_sections(char * ArgData,size_t ArgSize)632 __orc_rt_coff_register_object_sections(char *ArgData, size_t ArgSize) {
633 return WrapperFunction<SPSError(SPSExecutorAddr, SPSCOFFObjectSectionsMap,
634 bool)>::
635 handle(ArgData, ArgSize,
636 [](ExecutorAddr HeaderAddr,
637 std::vector<std::pair<std::string_view, ExecutorAddrRange>>
638 &Secs,
639 bool RunInitializers) {
640 return COFFPlatformRuntimeState::get().registerObjectSections(
641 HeaderAddr, std::move(Secs), RunInitializers);
642 })
643 .release();
644 }
645
646 ORC_RT_INTERFACE orc_rt_CWrapperFunctionResult
__orc_rt_coff_deregister_object_sections(char * ArgData,size_t ArgSize)647 __orc_rt_coff_deregister_object_sections(char *ArgData, size_t ArgSize) {
648 return WrapperFunction<SPSError(SPSExecutorAddr, SPSCOFFObjectSectionsMap)>::
649 handle(ArgData, ArgSize,
650 [](ExecutorAddr HeaderAddr,
651 std::vector<std::pair<std::string_view, ExecutorAddrRange>>
652 &Secs) {
653 return COFFPlatformRuntimeState::get().deregisterObjectSections(
654 HeaderAddr, std::move(Secs));
655 })
656 .release();
657 }
658 //------------------------------------------------------------------------------
659 // JIT'd dlfcn alternatives.
660 //------------------------------------------------------------------------------
661
__orc_rt_coff_jit_dlerror()662 const char *__orc_rt_coff_jit_dlerror() {
663 return COFFPlatformRuntimeState::get().dlerror();
664 }
665
__orc_rt_coff_jit_dlopen(const char * path,int mode)666 void *__orc_rt_coff_jit_dlopen(const char *path, int mode) {
667 return COFFPlatformRuntimeState::get().dlopen(path, mode);
668 }
669
__orc_rt_coff_jit_dlclose(void * header)670 int __orc_rt_coff_jit_dlclose(void *header) {
671 return COFFPlatformRuntimeState::get().dlclose(header);
672 }
673
__orc_rt_coff_jit_dlsym(void * header,const char * symbol)674 void *__orc_rt_coff_jit_dlsym(void *header, const char *symbol) {
675 return COFFPlatformRuntimeState::get().dlsym(header, symbol);
676 }
677
678 //------------------------------------------------------------------------------
679 // COFF SEH exception support
680 //------------------------------------------------------------------------------
681
682 struct ThrowInfo {
683 uint32_t attributes;
684 void *data;
685 };
686
__orc_rt_coff_cxx_throw_exception(void * pExceptionObject,ThrowInfo * pThrowInfo)687 ORC_RT_INTERFACE void __stdcall __orc_rt_coff_cxx_throw_exception(
688 void *pExceptionObject, ThrowInfo *pThrowInfo) {
689 #ifdef __clang__
690 #pragma clang diagnostic push
691 #pragma clang diagnostic ignored "-Wmultichar"
692 #endif
693 constexpr uint32_t EH_EXCEPTION_NUMBER = 'msc' | 0xE0000000;
694 #ifdef __clang__
695 #pragma clang diagnostic pop
696 #endif
697 constexpr uint32_t EH_MAGIC_NUMBER1 = 0x19930520;
698 auto BaseAddr = COFFPlatformRuntimeState::get().findJITDylibBaseByPC(
699 reinterpret_cast<uint64_t>(pThrowInfo));
700 if (!BaseAddr) {
701 // This is not from JIT'd region.
702 // FIXME: Use the default implementation like below when alias api is
703 // capable. _CxxThrowException(pExceptionObject, pThrowInfo);
704 fprintf(stderr, "Throwing exception from compiled callback into JIT'd "
705 "exception handler not supported yet.\n");
706 abort();
707 return;
708 }
709 const ULONG_PTR parameters[] = {
710 EH_MAGIC_NUMBER1,
711 reinterpret_cast<ULONG_PTR>(pExceptionObject),
712 reinterpret_cast<ULONG_PTR>(pThrowInfo),
713 reinterpret_cast<ULONG_PTR>(BaseAddr),
714 };
715 RaiseException(EH_EXCEPTION_NUMBER, EXCEPTION_NONCONTINUABLE,
716 _countof(parameters), parameters);
717 }
718
719 //------------------------------------------------------------------------------
720 // COFF atexits
721 //------------------------------------------------------------------------------
722
723 typedef int (*OnExitFunction)(void);
724 typedef void (*AtExitFunction)(void);
725
__orc_rt_coff_onexit(void * Header,OnExitFunction Func)726 ORC_RT_INTERFACE OnExitFunction __orc_rt_coff_onexit(void *Header,
727 OnExitFunction Func) {
728 if (auto Err = COFFPlatformRuntimeState::get().registerAtExit(
729 ExecutorAddr::fromPtr(Header), (void (*)(void))Func)) {
730 consumeError(std::move(Err));
731 return nullptr;
732 }
733 return Func;
734 }
735
__orc_rt_coff_atexit(void * Header,AtExitFunction Func)736 ORC_RT_INTERFACE int __orc_rt_coff_atexit(void *Header, AtExitFunction Func) {
737 if (auto Err = COFFPlatformRuntimeState::get().registerAtExit(
738 ExecutorAddr::fromPtr(Header), (void (*)(void))Func)) {
739 consumeError(std::move(Err));
740 return -1;
741 }
742 return 0;
743 }
744
745 //------------------------------------------------------------------------------
746 // COFF Run Program
747 //------------------------------------------------------------------------------
748
__orc_rt_coff_run_program(const char * JITDylibName,const char * EntrySymbolName,int argc,char * argv[])749 ORC_RT_INTERFACE int64_t __orc_rt_coff_run_program(const char *JITDylibName,
750 const char *EntrySymbolName,
751 int argc, char *argv[]) {
752 using MainTy = int (*)(int, char *[]);
753
754 void *H =
755 __orc_rt_coff_jit_dlopen(JITDylibName, __orc_rt::coff::ORC_RT_RTLD_LAZY);
756 if (!H) {
757 __orc_rt_log_error(__orc_rt_coff_jit_dlerror());
758 return -1;
759 }
760
761 auto *Main =
762 reinterpret_cast<MainTy>(__orc_rt_coff_jit_dlsym(H, EntrySymbolName));
763
764 if (!Main) {
765 __orc_rt_log_error(__orc_rt_coff_jit_dlerror());
766 return -1;
767 }
768
769 int Result = Main(argc, argv);
770
771 if (__orc_rt_coff_jit_dlclose(H) == -1)
772 __orc_rt_log_error(__orc_rt_coff_jit_dlerror());
773
774 return Result;
775 }
776