1 //===---- ExecutionUtils.cpp - Utilities for executing functions in Orc ---===//
3 // The LLVM Compiler Infrastructure
5 // This file is distributed under the University of Illinois Open Source
6 // License. See LICENSE.TXT for details.
8 //===----------------------------------------------------------------------===//
10 #include "llvm/ExecutionEngine/Orc/ExecutionUtils.h"
12 #include "llvm/IR/Constants.h"
13 #include "llvm/IR/Function.h"
14 #include "llvm/IR/GlobalVariable.h"
15 #include "llvm/IR/Module.h"
20 CtorDtorIterator::CtorDtorIterator(const GlobalVariable *GV, bool End)
22 GV ? dyn_cast_or_null<ConstantArray>(GV->getInitializer()) : nullptr),
23 I((InitList && End) ? InitList->getNumOperands() : 0) {
26 bool CtorDtorIterator::operator==(const CtorDtorIterator &Other) const {
27 assert(InitList == Other.InitList && "Incomparable iterators.");
31 bool CtorDtorIterator::operator!=(const CtorDtorIterator &Other) const {
32 return !(*this == Other);
35 CtorDtorIterator& CtorDtorIterator::operator++() {
40 CtorDtorIterator CtorDtorIterator::operator++(int) {
41 CtorDtorIterator Temp = *this;
46 CtorDtorIterator::Element CtorDtorIterator::operator*() const {
47 ConstantStruct *CS = dyn_cast<ConstantStruct>(InitList->getOperand(I));
48 assert(CS && "Unrecognized type in llvm.global_ctors/llvm.global_dtors");
50 Constant *FuncC = CS->getOperand(1);
51 Function *Func = nullptr;
53 // Extract function pointer, pulling off any casts.
55 if (Function *F = dyn_cast_or_null<Function>(FuncC)) {
58 } else if (ConstantExpr *CE = dyn_cast_or_null<ConstantExpr>(FuncC)) {
60 FuncC = dyn_cast_or_null<ConstantExpr>(CE->getOperand(0));
64 // This isn't anything we recognize. Bail out with Func left set to null.
69 ConstantInt *Priority = dyn_cast<ConstantInt>(CS->getOperand(0));
70 Value *Data = CS->getOperand(2);
71 return Element(Priority->getZExtValue(), Func, Data);
74 iterator_range<CtorDtorIterator> getConstructors(const Module &M) {
75 const GlobalVariable *CtorsList = M.getNamedGlobal("llvm.global_ctors");
76 return make_range(CtorDtorIterator(CtorsList, false),
77 CtorDtorIterator(CtorsList, true));
80 iterator_range<CtorDtorIterator> getDestructors(const Module &M) {
81 const GlobalVariable *DtorsList = M.getNamedGlobal("llvm.global_dtors");
82 return make_range(CtorDtorIterator(DtorsList, false),
83 CtorDtorIterator(DtorsList, true));
86 void LocalCXXRuntimeOverrides::runDestructors() {
87 auto& CXXDestructorDataPairs = DSOHandleOverride;
88 for (auto &P : CXXDestructorDataPairs)
90 CXXDestructorDataPairs.clear();
93 int LocalCXXRuntimeOverrides::CXAAtExitOverride(DestructorPtr Destructor,
94 void *Arg, void *DSOHandle) {
95 auto& CXXDestructorDataPairs =
96 *reinterpret_cast<CXXDestructorDataPairList*>(DSOHandle);
97 CXXDestructorDataPairs.push_back(std::make_pair(Destructor, Arg));
101 } // End namespace orc.
102 } // End namespace llvm.