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Reference Guide
TClingCallFunc.cxx
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1 // root/core/meta
2 // vim: sw=3
3 // Author: Paul Russo 30/07/2012
4 // Author: Vassil Vassilev 9/02/2013
5 
6 /*************************************************************************
7  * Copyright (C) 1995-2013, Rene Brun and Fons Rademakers. *
8  * All rights reserved. *
9  * *
10  * For the licensing terms see $ROOTSYS/LICENSE. *
11  * For the list of contributors see $ROOTSYS/README/CREDITS. *
12  *************************************************************************/
13 
14 /** \class TClingCallFunc
15 Emulation of the CINT CallFunc class.
16 
17 The CINT C++ interpreter provides an interface for calling
18 functions through the generated wrappers in dictionaries with
19 the CallFunc class. This class provides the same functionality,
20 using an interface as close as possible to CallFunc but the
21 function metadata and calling service comes from the Cling
22 C++ interpreter and the Clang C++ compiler, not CINT.
23 */
24 
25 #include "TClingCallFunc.h"
26 
27 #include "TClingClassInfo.h"
28 #include "TClingMethodInfo.h"
29 #include "TInterpreterValue.h"
30 #include "TClingUtils.h"
31 
32 #include "TError.h"
33 #include "TCling.h"
34 
35 #include "cling/Interpreter/CompilationOptions.h"
36 #include "cling/Interpreter/Interpreter.h"
37 #include "cling/Interpreter/LookupHelper.h"
38 #include "cling/Interpreter/Transaction.h"
39 #include "cling/Interpreter/Value.h"
40 #include "cling/Utils/AST.h"
41 
42 #include "clang/AST/ASTContext.h"
43 #include "clang/AST/Decl.h"
44 #include "clang/AST/DeclCXX.h"
45 #include "clang/AST/GlobalDecl.h"
46 #include "clang/AST/PrettyPrinter.h"
47 #include "clang/AST/RecordLayout.h"
48 #include "clang/AST/Type.h"
49 #include "clang/Frontend/CompilerInstance.h"
50 #include "clang/Lex/Preprocessor.h"
51 #include "clang/Sema/Sema.h"
52 #include "clang/Sema/Lookup.h"
53 
54 #include "llvm/ADT/APInt.h"
55 #include "llvm/ExecutionEngine/ExecutionEngine.h"
56 #include "llvm/ExecutionEngine/GenericValue.h"
57 #include "llvm/Support/Casting.h"
58 #include "llvm/Support/raw_ostream.h"
59 #include "llvm/IR/LLVMContext.h"
60 #include "llvm/IR/DerivedTypes.h"
61 #include "llvm/IR/Function.h"
62 #include "llvm/IR/GlobalValue.h"
63 #include "llvm/IR/Module.h"
64 #include "llvm/IR/Type.h"
65 
66 #include "clang/Sema/SemaInternal.h"
67 
68 #include <map>
69 #include <string>
70 #include <sstream>
71 
72 using namespace ROOT;
73 using namespace llvm;
74 using namespace clang;
75 using namespace std;
76 
77 static unsigned long long gWrapperSerial = 0LL;
78 static const string kIndentString(" ");
79 
80 static map<const Decl *, void *> gWrapperStore;
81 static map<const Decl *, void *> gCtorWrapperStore;
82 static map<const Decl *, void *> gDtorWrapperStore;
83 
84 static
85 inline
86 void
87 indent(ostringstream &buf, int indent_level)
88 {
89  for (int i = 0; i < indent_level; ++i) {
90  buf << kIndentString;
91  }
92 }
93 
94 static
95 void
96 EvaluateExpr(cling::Interpreter &interp, const Expr *E, cling::Value &V)
97 {
98  // Evaluate an Expr* and return its cling::Value
99  ASTContext &C = interp.getCI()->getASTContext();
100  clang::Expr::EvalResult evalRes;
101  if (E->EvaluateAsInt(evalRes, C, /*AllowSideEffects*/Expr::SE_NoSideEffects)) {
102  APSInt res = evalRes.Val.getInt();
103  // IntTy or maybe better E->getType()?
104  V = cling::Value(C.IntTy, interp);
105  // We must use the correct signedness otherwise the zero extension
106  // fails if the actual type is strictly less than long long.
107  if (res.isSigned())
108  V.getLL() = res.getSExtValue();
109  else
110  V.getULL() = res.getZExtValue();
111  return;
112  }
113  // TODO: Build a wrapper around the expression to avoid decompilation and
114  // compilation and other string operations.
115  PrintingPolicy Policy(C.getPrintingPolicy());
116  Policy.SuppressTagKeyword = true;
117  Policy.SuppressUnwrittenScope = false;
118  Policy.SuppressInitializers = false;
119  Policy.AnonymousTagLocations = false;
120  string buf;
121  raw_string_ostream out(buf);
122  E->printPretty(out, /*Helper=*/0, Policy, /*Indentation=*/0);
123  out << ';'; // no value printing
124  out.flush();
125  // Evaluate() will set V to invalid if evaluation fails.
126  interp.evaluate(buf, V);
127 }
128 
129 namespace {
130  template <typename returnType>
131  returnType sv_to(const cling::Value &val)
132  {
133  QualType QT = val.getType().getCanonicalType();
134  if (const BuiltinType *BT =
135  dyn_cast<BuiltinType>(&*QT)) {
136  //
137  // WARNING!!!
138  //
139  // This switch is organized in order-of-declaration
140  // so that the produced assembly code is optimal.
141  // Do not reorder!
142  //
143  switch (BT->getKind()) {
144  case BuiltinType::Void:
145  // CINT used to expect a result of 0.
146  return (returnType) 0;
147  break;
148  //
149  // Unsigned Types
150  //
151  case BuiltinType::Bool:
152  case BuiltinType::Char_U: // char on targets where it is unsigned
153  case BuiltinType::UChar:
154  return (returnType) val.getULL();
155  break;
156 
157  case BuiltinType::WChar_U:
158  // wchar_t on targets where it is unsigned
159  // The standard doesn't allow to specify signednedd of wchar_t
160  // thus this maps simply to wchar_t.
161  return (returnType)(wchar_t) val.getULL();
162  break;
163 
164  case BuiltinType::Char16:
165  case BuiltinType::Char32:
166  case BuiltinType::UShort:
167  case BuiltinType::UInt:
168  case BuiltinType::ULong:
169  case BuiltinType::ULongLong:
170  return (returnType) val.getULL();
171  break;
172 
173  case BuiltinType::UInt128:
174  // __uint128_t
175  break;
176 
177  //
178  // Signed Types
179  //
180  case BuiltinType::Char_S: // char on targets where it is signed
181  case BuiltinType::SChar:
182  return (returnType) val.getLL();
183  break;
184 
185  case BuiltinType::WChar_S:
186  // wchar_t on targets where it is signed
187  // The standard doesn't allow to specify signednedd of wchar_t
188  // thus this maps simply to wchar_t.
189  return (returnType)(wchar_t) val.getLL();
190  break;
191 
192  case BuiltinType::Short:
193  case BuiltinType::Int:
194  case BuiltinType::Long:
195  case BuiltinType::LongLong:
196  return (returnType) val.getLL();
197  break;
198 
199  case BuiltinType::Int128:
200  break;
201 
202  case BuiltinType::Half:
203  // half in OpenCL, __fp16 in ARM NEON
204  break;
205 
206  case BuiltinType::Float:
207  return (returnType) val.getFloat();
208  break;
209  case BuiltinType::Double:
210  return (returnType) val.getDouble();
211  break;
212  case BuiltinType::LongDouble:
213  return (returnType) val.getLongDouble();
214  break;
215 
216  case BuiltinType::NullPtr:
217  return (returnType) 0;
218  break;
219 
220  default:
221  break;
222  }
223  }
224  if (QT->isPointerType() || QT->isArrayType() || QT->isRecordType() ||
225  QT->isReferenceType()) {
226  return (returnType)(long) val.getPtr();
227  }
228  if (const EnumType *ET = dyn_cast<EnumType>(&*QT)) {
229  if (ET->getDecl()->getIntegerType()->hasSignedIntegerRepresentation())
230  return (returnType) val.getLL();
231  else
232  return (returnType) val.getULL();
233  }
234  if (QT->isMemberPointerType()) {
235  const MemberPointerType *MPT = QT->getAs<MemberPointerType>();
236  if (MPT->isMemberDataPointer()) {
237  return (returnType)(ptrdiff_t)val.getPtr();
238  }
239  return (returnType)(long) val.getPtr();
240  }
241  ::Error("TClingCallFunc::sv_to", "Invalid Type!");
242  QT->dump();
243  return 0;
244  }
245 
246  static
247  long long sv_to_long_long(const cling::Value &val)
248  {
249  return sv_to<long long>(val);
250  }
251  static
252  unsigned long long sv_to_ulong_long(const cling::Value &val)
253  {
254  return sv_to<unsigned long long>(val);
255  }
256 
257 } // unnamed namespace.
258 
259 size_t TClingCallFunc::CalculateMinRequiredArguments()
260 {
261  // This function is non-const to use caching overload of GetDecl()!
262  return GetDecl()->getMinRequiredArguments();
263 }
264 
265 void *TClingCallFunc::compile_wrapper(const string &wrapper_name, const string &wrapper,
266  bool withAccessControl/*=true*/)
267 {
268  return fInterp->compileFunction(wrapper_name, wrapper, false /*ifUnique*/,
269  withAccessControl);
270 }
271 
272 void TClingCallFunc::collect_type_info(QualType &QT, ostringstream &typedefbuf, std::ostringstream &callbuf,
273  string &type_name, EReferenceType &refType, bool &isPointer, int indent_level,
274  bool forArgument)
275 {
276  //
277  // Collect information about type type of a function parameter
278  // needed for building the wrapper function.
279  //
280  const FunctionDecl *FD = GetDecl();
281  PrintingPolicy Policy(FD->getASTContext().getPrintingPolicy());
282  refType = kNotReference;
283  if (QT->isRecordType() && forArgument) {
284  ROOT::TMetaUtils::GetNormalizedName(type_name, QT, *fInterp, fNormCtxt);
285  return;
286  }
287  if (QT->isFunctionPointerType()) {
288  string fp_typedef_name;
289  {
290  ostringstream nm;
291  nm << "FP" << gWrapperSerial++;
292  type_name = nm.str();
293  raw_string_ostream OS(fp_typedef_name);
294  QT.print(OS, Policy, type_name);
295  OS.flush();
296  }
297  for (int i = 0; i < indent_level; ++i) {
298  typedefbuf << kIndentString;
299  }
300  typedefbuf << "typedef " << fp_typedef_name << ";\n";
301  return;
302  } else if (QT->isMemberPointerType()) {
303  string mp_typedef_name;
304  {
305  ostringstream nm;
306  nm << "MP" << gWrapperSerial++;
307  type_name = nm.str();
308  raw_string_ostream OS(mp_typedef_name);
309  QT.print(OS, Policy, type_name);
310  OS.flush();
311  }
312  for (int i = 0; i < indent_level; ++i) {
313  typedefbuf << kIndentString;
314  }
315  typedefbuf << "typedef " << mp_typedef_name << ";\n";
316  return;
317  } else if (QT->isPointerType()) {
318  isPointer = true;
319  QT = cast<clang::PointerType>(QT)->getPointeeType();
320  } else if (QT->isReferenceType()) {
321  if (QT->isRValueReferenceType()) refType = kRValueReference;
322  else refType = kLValueReference;
323  QT = cast<ReferenceType>(QT)->getPointeeType();
324  }
325  // Fall through for the array type to deal with reference/pointer ro array type.
326  if (QT->isArrayType()) {
327  string ar_typedef_name;
328  {
329  ostringstream ar;
330  ar << "AR" << gWrapperSerial++;
331  type_name = ar.str();
332  raw_string_ostream OS(ar_typedef_name);
333  QT.print(OS, Policy, type_name);
334  OS.flush();
335  }
336  for (int i = 0; i < indent_level; ++i) {
337  typedefbuf << kIndentString;
338  }
339  typedefbuf << "typedef " << ar_typedef_name << ";\n";
340  return;
341  }
342  ROOT::TMetaUtils::GetNormalizedName(type_name, QT, *fInterp, fNormCtxt);
343 }
344 
345 void TClingCallFunc::make_narg_ctor(const unsigned N, ostringstream &typedefbuf,
346  ostringstream &callbuf, const string &class_name,
347  int indent_level)
348 {
349  // Make a code string that follows this pattern:
350  //
351  // new ClassName(args...)
352  //
353  const FunctionDecl *FD = GetDecl();
354 
355  callbuf << "new " << class_name << "(";
356  for (unsigned i = 0U; i < N; ++i) {
357  const ParmVarDecl *PVD = FD->getParamDecl(i);
358  QualType Ty = PVD->getType();
359  QualType QT = Ty.getCanonicalType();
360  string type_name;
361  EReferenceType refType = kNotReference;
362  bool isPointer = false;
363  collect_type_info(QT, typedefbuf, callbuf, type_name,
364  refType, isPointer, indent_level, true);
365  if (i) {
366  callbuf << ',';
367  if (i % 2) {
368  callbuf << ' ';
369  } else {
370  callbuf << "\n";
371  for (int j = 0; j <= indent_level; ++j) {
372  callbuf << kIndentString;
373  }
374  }
375  }
376  if (refType != kNotReference) {
377  callbuf << "(" << type_name.c_str() <<
378  (refType == kLValueReference ? "&" : "&&") << ")*(" << type_name.c_str() << "*)args["
379  << i << "]";
380  } else if (isPointer) {
381  callbuf << "*(" << type_name.c_str() << "**)args["
382  << i << "]";
383  } else {
384  callbuf << "*(" << type_name.c_str() << "*)args[" << i << "]";
385  }
386  }
387  callbuf << ")";
388 }
389 
390 void TClingCallFunc::make_narg_call(const std::string &return_type, const unsigned N, ostringstream &typedefbuf,
391  ostringstream &callbuf, const string &class_name, int indent_level)
392 {
393  //
394  // Make a code string that follows this pattern:
395  //
396  // ((<class>*)obj)-><method>(*(<arg-i-type>*)args[i], ...)
397  //
398  const FunctionDecl *FD = GetDecl();
399 
400  // Sometimes it's necessary that we cast the function we want to call first
401  // to its explicit function type before calling it. This is supposed to prevent
402  // that we accidentially ending up in a function that is not the one we're
403  // supposed to call here (e.g. because the C++ function lookup decides to take
404  // another function that better fits).
405  // This method has some problems, e.g. when we call a function with default
406  // arguments and we don't provide all arguments, we would fail with this pattern.
407  // Same applies with member methods which seem to cause parse failures even when
408  // we supply the object parameter.
409  // Therefore we only use it in cases where we know it works and set this variable
410  // to true when we do.
411  bool ShouldCastFunction = !isa<CXXMethodDecl>(FD) && N == FD->getNumParams();
412  if (ShouldCastFunction) {
413  callbuf << "(";
414  callbuf << "(";
415  callbuf << return_type << " (&)";
416  {
417  callbuf << "(";
418  for (unsigned i = 0U; i < N; ++i) {
419  if (i) {
420  callbuf << ',';
421  if (i % 2) {
422  callbuf << ' ';
423  } else {
424  callbuf << "\n";
425  for (int j = 0; j <= indent_level; ++j) {
426  callbuf << kIndentString;
427  }
428  }
429  }
430  const ParmVarDecl *PVD = FD->getParamDecl(i);
431  QualType Ty = PVD->getType();
432  QualType QT = Ty.getCanonicalType();
433  std::string arg_type;
434  ROOT::TMetaUtils::GetNormalizedName(arg_type, QT, *fInterp, fNormCtxt);
435  callbuf << arg_type;
436  }
437  if (FD->isVariadic())
438  callbuf << ", ...";
439  callbuf << ")";
440  }
441 
442  callbuf << ")";
443  }
444 
445  if (const CXXMethodDecl *MD = dyn_cast<CXXMethodDecl>(FD)) {
446  // This is a class, struct, or union member.
447  if (MD->isConst())
448  callbuf << "((const " << class_name << "*)obj)->";
449  else
450  callbuf << "((" << class_name << "*)obj)->";
451  } else if (const NamedDecl *ND =
452  dyn_cast<NamedDecl>(GetDeclContext())) {
453  // This is a namespace member.
454  (void) ND;
455  callbuf << class_name << "::";
456  }
457  // callbuf << fMethod->Name() << "(";
458  {
459  std::string name;
460  {
461  llvm::raw_string_ostream stream(name);
462  FD->getNameForDiagnostic(stream, FD->getASTContext().getPrintingPolicy(), /*Qualified=*/false);
463  }
464  callbuf << name;
465  }
466  if (ShouldCastFunction) callbuf << ")";
467 
468  callbuf << "(";
469  for (unsigned i = 0U; i < N; ++i) {
470  const ParmVarDecl *PVD = FD->getParamDecl(i);
471  QualType Ty = PVD->getType();
472  QualType QT = Ty.getCanonicalType();
473  string type_name;
474  EReferenceType refType = kNotReference;
475  bool isPointer = false;
476  collect_type_info(QT, typedefbuf, callbuf, type_name, refType, isPointer, indent_level, true);
477 
478  if (i) {
479  callbuf << ',';
480  if (i % 2) {
481  callbuf << ' ';
482  } else {
483  callbuf << "\n";
484  for (int j = 0; j <= indent_level; ++j) {
485  callbuf << kIndentString;
486  }
487  }
488  }
489 
490  if (refType != kNotReference) {
491  callbuf << "(" << type_name.c_str() <<
492  (refType == kLValueReference ? "&" : "&&") << ")*(" << type_name.c_str() << "*)args["
493  << i << "]";
494  } else if (isPointer) {
495  callbuf << "*(" << type_name.c_str() << "**)args["
496  << i << "]";
497  } else {
498  // pointer falls back to non-pointer case; the argument preserves
499  // the "pointerness" (i.e. doesn't reference the value).
500  callbuf << "*(" << type_name.c_str() << "*)args[" << i << "]";
501  }
502  }
503  callbuf << ")";
504 }
505 
506 void TClingCallFunc::make_narg_ctor_with_return(const unsigned N, const string &class_name,
507  ostringstream &buf, int indent_level)
508 {
509  // Make a code string that follows this pattern:
510  //
511  // if (ret) {
512  // (*(ClassName**)ret) = new ClassName(args...);
513  // }
514  // else {
515  // new ClassName(args...);
516  // }
517  //
518  for (int i = 0; i < indent_level; ++i) {
519  buf << kIndentString;
520  }
521  buf << "if (ret) {\n";
522  ++indent_level;
523  {
524  ostringstream typedefbuf;
525  ostringstream callbuf;
526  //
527  // Write the return value assignment part.
528  //
529  for (int i = 0; i < indent_level; ++i) {
530  callbuf << kIndentString;
531  }
532  callbuf << "(*(" << class_name << "**)ret) = ";
533  //
534  // Write the actual new expression.
535  //
536  make_narg_ctor(N, typedefbuf, callbuf, class_name, indent_level);
537  //
538  // End the new expression statement.
539  //
540  callbuf << ";\n";
541  for (int i = 0; i < indent_level; ++i) {
542  callbuf << kIndentString;
543  }
544  callbuf << "return;\n";
545  //
546  // Output the whole new expression and return statement.
547  //
548  buf << typedefbuf.str() << callbuf.str();
549  }
550  --indent_level;
551  for (int i = 0; i < indent_level; ++i) {
552  buf << kIndentString;
553  }
554  buf << "}\n";
555  for (int i = 0; i < indent_level; ++i) {
556  buf << kIndentString;
557  }
558  buf << "else {\n";
559  ++indent_level;
560  {
561  ostringstream typedefbuf;
562  ostringstream callbuf;
563  for (int i = 0; i < indent_level; ++i) {
564  callbuf << kIndentString;
565  }
566  make_narg_ctor(N, typedefbuf, callbuf, class_name, indent_level);
567  callbuf << ";\n";
568  for (int i = 0; i < indent_level; ++i) {
569  callbuf << kIndentString;
570  }
571  callbuf << "return;\n";
572  buf << typedefbuf.str() << callbuf.str();
573  }
574  --indent_level;
575  for (int i = 0; i < indent_level; ++i) {
576  buf << kIndentString;
577  }
578  buf << "}\n";
579 }
580 
581 ///////////////////////////////////////////////////////////////////////////////
582 // Returns the DeclContext corresponding to fMethod's Decl.
583 // \Note that this might be a FunctionDecl or a UsingShadowDecl; we use the
584 // DeclContext of the UsingShadowDecl e.g. for constructing a derived class
585 // object, even if invoking a function made available by a using declaration
586 // of a constructor of a base class (ROOT-11010).
587 
588 const clang::DeclContext *TClingCallFunc::GetDeclContext() const {
589  return fMethod->GetDecl()->getDeclContext();
590 }
591 
592 int TClingCallFunc::get_wrapper_code(std::string &wrapper_name, std::string &wrapper)
593 {
594  const FunctionDecl *FD = GetDecl();
595  assert(FD && "generate_wrapper called without a function decl!");
596  ASTContext &Context = FD->getASTContext();
597  PrintingPolicy Policy(Context.getPrintingPolicy());
598  //
599  // Get the class or namespace name.
600  //
601  string class_name;
602  const clang::DeclContext *DC = GetDeclContext();
603  if (const TypeDecl *TD = dyn_cast<TypeDecl>(DC)) {
604  // This is a class, struct, or union member.
605  QualType QT(TD->getTypeForDecl(), 0);
606  ROOT::TMetaUtils::GetNormalizedName(class_name, QT, *fInterp, fNormCtxt);
607  } else if (const NamedDecl *ND = dyn_cast<NamedDecl>(DC)) {
608  // This is a namespace member.
609  raw_string_ostream stream(class_name);
610  ND->getNameForDiagnostic(stream, Policy, /*Qualified=*/true);
611  stream.flush();
612  }
613  //
614  // Check to make sure that we can
615  // instantiate and codegen this function.
616  //
617  bool needInstantiation = false;
618  const FunctionDecl *Definition = 0;
619  if (!FD->isDefined(Definition)) {
620  FunctionDecl::TemplatedKind TK = FD->getTemplatedKind();
621  switch (TK) {
622  case FunctionDecl::TK_NonTemplate: {
623  // Ordinary function, not a template specialization.
624  // Note: This might be ok, the body might be defined
625  // in a library, and all we have seen is the
626  // header file.
627  //::Error("TClingCallFunc::make_wrapper",
628  // "Cannot make wrapper for a function which is "
629  // "declared but not defined!");
630  // return 0;
631  } break;
632  case FunctionDecl::TK_FunctionTemplate: {
633  // This decl is actually a function template,
634  // not a function at all.
635  ::Error("TClingCallFunc::make_wrapper", "Cannot make wrapper for a function template!");
636  return 0;
637  } break;
638  case FunctionDecl::TK_MemberSpecialization: {
639  // This function is the result of instantiating an ordinary
640  // member function of a class template, or of instantiating
641  // an ordinary member function of a class member of a class
642  // template, or of specializing a member function template
643  // of a class template, or of specializing a member function
644  // template of a class member of a class template.
645  if (!FD->isTemplateInstantiation()) {
646  // We are either TSK_Undeclared or
647  // TSK_ExplicitSpecialization.
648  // Note: This might be ok, the body might be defined
649  // in a library, and all we have seen is the
650  // header file.
651  //::Error("TClingCallFunc::make_wrapper",
652  // "Cannot make wrapper for a function template "
653  // "explicit specialization which is declared "
654  // "but not defined!");
655  // return 0;
656  break;
657  }
658  const FunctionDecl *Pattern = FD->getTemplateInstantiationPattern();
659  if (!Pattern) {
660  ::Error("TClingCallFunc::make_wrapper", "Cannot make wrapper for a member function "
661  "instantiation with no pattern!");
662  return 0;
663  }
664  FunctionDecl::TemplatedKind PTK = Pattern->getTemplatedKind();
665  TemplateSpecializationKind PTSK = Pattern->getTemplateSpecializationKind();
666  if (
667  // The pattern is an ordinary member function.
668  (PTK == FunctionDecl::TK_NonTemplate) ||
669  // The pattern is an explicit specialization, and
670  // so is not a template.
671  ((PTK != FunctionDecl::TK_FunctionTemplate) &&
672  ((PTSK == TSK_Undeclared) || (PTSK == TSK_ExplicitSpecialization)))) {
673  // Note: This might be ok, the body might be defined
674  // in a library, and all we have seen is the
675  // header file.
676  break;
677  } else if (!Pattern->hasBody()) {
678  ::Error("TClingCallFunc::make_wrapper", "Cannot make wrapper for a member function "
679  "instantiation with no body!");
680  return 0;
681  }
682  if (FD->isImplicitlyInstantiable()) {
683  needInstantiation = true;
684  }
685  } break;
686  case FunctionDecl::TK_FunctionTemplateSpecialization: {
687  // This function is the result of instantiating a function
688  // template or possibly an explicit specialization of a
689  // function template. Could be a namespace scope function or a
690  // member function.
691  if (!FD->isTemplateInstantiation()) {
692  // We are either TSK_Undeclared or
693  // TSK_ExplicitSpecialization.
694  // Note: This might be ok, the body might be defined
695  // in a library, and all we have seen is the
696  // header file.
697  //::Error("TClingCallFunc::make_wrapper",
698  // "Cannot make wrapper for a function template "
699  // "explicit specialization which is declared "
700  // "but not defined!");
701  // return 0;
702  break;
703  }
704  const FunctionDecl *Pattern = FD->getTemplateInstantiationPattern();
705  if (!Pattern) {
706  ::Error("TClingCallFunc::make_wrapper", "Cannot make wrapper for a function template"
707  "instantiation with no pattern!");
708  return 0;
709  }
710  FunctionDecl::TemplatedKind PTK = Pattern->getTemplatedKind();
711  TemplateSpecializationKind PTSK = Pattern->getTemplateSpecializationKind();
712  if (
713  // The pattern is an ordinary member function.
714  (PTK == FunctionDecl::TK_NonTemplate) ||
715  // The pattern is an explicit specialization, and
716  // so is not a template.
717  ((PTK != FunctionDecl::TK_FunctionTemplate) &&
718  ((PTSK == TSK_Undeclared) || (PTSK == TSK_ExplicitSpecialization)))) {
719  // Note: This might be ok, the body might be defined
720  // in a library, and all we have seen is the
721  // header file.
722  break;
723  }
724  if (!Pattern->hasBody()) {
725  ::Error("TClingCallFunc::make_wrapper", "Cannot make wrapper for a function template"
726  "instantiation with no body!");
727  return 0;
728  }
729  if (FD->isImplicitlyInstantiable()) {
730  needInstantiation = true;
731  }
732  } break;
733  case FunctionDecl::TK_DependentFunctionTemplateSpecialization: {
734  // This function is the result of instantiating or
735  // specializing a member function of a class template,
736  // or a member function of a class member of a class template,
737  // or a member function template of a class template, or a
738  // member function template of a class member of a class
739  // template where at least some part of the function is
740  // dependent on a template argument.
741  if (!FD->isTemplateInstantiation()) {
742  // We are either TSK_Undeclared or
743  // TSK_ExplicitSpecialization.
744  // Note: This might be ok, the body might be defined
745  // in a library, and all we have seen is the
746  // header file.
747  //::Error("TClingCallFunc::make_wrapper",
748  // "Cannot make wrapper for a dependent function "
749  // "template explicit specialization which is declared "
750  // "but not defined!");
751  // return 0;
752  break;
753  }
754  const FunctionDecl *Pattern = FD->getTemplateInstantiationPattern();
755  if (!Pattern) {
756  ::Error("TClingCallFunc::make_wrapper", "Cannot make wrapper for a dependent function template"
757  "instantiation with no pattern!");
758  return 0;
759  }
760  FunctionDecl::TemplatedKind PTK = Pattern->getTemplatedKind();
761  TemplateSpecializationKind PTSK = Pattern->getTemplateSpecializationKind();
762  if (
763  // The pattern is an ordinary member function.
764  (PTK == FunctionDecl::TK_NonTemplate) ||
765  // The pattern is an explicit specialization, and
766  // so is not a template.
767  ((PTK != FunctionDecl::TK_FunctionTemplate) &&
768  ((PTSK == TSK_Undeclared) || (PTSK == TSK_ExplicitSpecialization)))) {
769  // Note: This might be ok, the body might be defined
770  // in a library, and all we have seen is the
771  // header file.
772  break;
773  }
774  if (!Pattern->hasBody()) {
775  ::Error("TClingCallFunc::make_wrapper", "Cannot make wrapper for a dependent function template"
776  "instantiation with no body!");
777  return 0;
778  }
779  if (FD->isImplicitlyInstantiable()) {
780  needInstantiation = true;
781  }
782  } break;
783  default: {
784  // Will only happen if clang implementation changes.
785  // Protect ourselves in case that happens.
786  ::Error("TClingCallFunc::make_wrapper", "Unhandled template kind!");
787  return 0;
788  } break;
789  }
790  // We do not set needInstantiation to true in these cases:
791  //
792  // isInvalidDecl()
793  // TSK_Undeclared
794  // TSK_ExplicitInstantiationDefinition
795  // TSK_ExplicitSpecialization && !getClassScopeSpecializationPattern()
796  // TSK_ExplicitInstantiationDeclaration &&
797  // getTemplateInstantiationPattern() &&
798  // PatternDecl->hasBody() &&
799  // !PatternDecl->isInlined()
800  //
801  // Set it true in these cases:
802  //
803  // TSK_ImplicitInstantiation
804  // TSK_ExplicitInstantiationDeclaration && (!getPatternDecl() ||
805  // !PatternDecl->hasBody() || PatternDecl->isInlined())
806  //
807  }
808  if (needInstantiation) {
809  clang::FunctionDecl *FDmod = const_cast<clang::FunctionDecl *>(FD);
810  clang::Sema &S = fInterp->getSema();
811  // Could trigger deserialization of decls.
812  cling::Interpreter::PushTransactionRAII RAII(fInterp);
813  S.InstantiateFunctionDefinition(SourceLocation(), FDmod,
814  /*Recursive=*/true,
815  /*DefinitionRequired=*/true);
816  if (!FD->isDefined(Definition)) {
817  ::Error("TClingCallFunc::make_wrapper", "Failed to force template instantiation!");
818  return 0;
819  }
820  }
821  if (Definition) {
822  FunctionDecl::TemplatedKind TK = Definition->getTemplatedKind();
823  switch (TK) {
824  case FunctionDecl::TK_NonTemplate: {
825  // Ordinary function, not a template specialization.
826  if (Definition->isDeleted()) {
827  ::Error("TClingCallFunc::make_wrapper", "Cannot make wrapper for a deleted function!");
828  return 0;
829  } else if (Definition->isLateTemplateParsed()) {
830  ::Error("TClingCallFunc::make_wrapper", "Cannot make wrapper for a late template parsed "
831  "function!");
832  return 0;
833  }
834  // else if (Definition->isDefaulted()) {
835  // // Might not have a body, but we can still use it.
836  //}
837  // else {
838  // // Has a body.
839  //}
840  } break;
841  case FunctionDecl::TK_FunctionTemplate: {
842  // This decl is actually a function template,
843  // not a function at all.
844  ::Error("TClingCallFunc::make_wrapper", "Cannot make wrapper for a function template!");
845  return 0;
846  } break;
847  case FunctionDecl::TK_MemberSpecialization: {
848  // This function is the result of instantiating an ordinary
849  // member function of a class template or of a member class
850  // of a class template.
851  if (Definition->isDeleted()) {
852  ::Error("TClingCallFunc::make_wrapper", "Cannot make wrapper for a deleted member function "
853  "of a specialization!");
854  return 0;
855  } else if (Definition->isLateTemplateParsed()) {
856  ::Error("TClingCallFunc::make_wrapper", "Cannot make wrapper for a late template parsed "
857  "member function of a specialization!");
858  return 0;
859  }
860  // else if (Definition->isDefaulted()) {
861  // // Might not have a body, but we can still use it.
862  //}
863  // else {
864  // // Has a body.
865  //}
866  } break;
867  case FunctionDecl::TK_FunctionTemplateSpecialization: {
868  // This function is the result of instantiating a function
869  // template or possibly an explicit specialization of a
870  // function template. Could be a namespace scope function or a
871  // member function.
872  if (Definition->isDeleted()) {
873  ::Error("TClingCallFunc::make_wrapper", "Cannot make wrapper for a deleted function "
874  "template specialization!");
875  return 0;
876  } else if (Definition->isLateTemplateParsed()) {
877  ::Error("TClingCallFunc::make_wrapper", "Cannot make wrapper for a late template parsed "
878  "function template specialization!");
879  return 0;
880  }
881  // else if (Definition->isDefaulted()) {
882  // // Might not have a body, but we can still use it.
883  //}
884  // else {
885  // // Has a body.
886  //}
887  } break;
888  case FunctionDecl::TK_DependentFunctionTemplateSpecialization: {
889  // This function is the result of instantiating or
890  // specializing a member function of a class template,
891  // or a member function of a class member of a class template,
892  // or a member function template of a class template, or a
893  // member function template of a class member of a class
894  // template where at least some part of the function is
895  // dependent on a template argument.
896  if (Definition->isDeleted()) {
897  ::Error("TClingCallFunc::make_wrapper", "Cannot make wrapper for a deleted dependent function "
898  "template specialization!");
899  return 0;
900  } else if (Definition->isLateTemplateParsed()) {
901  ::Error("TClingCallFunc::make_wrapper", "Cannot make wrapper for a late template parsed "
902  "dependent function template specialization!");
903  return 0;
904  }
905  // else if (Definition->isDefaulted()) {
906  // // Might not have a body, but we can still use it.
907  //}
908  // else {
909  // // Has a body.
910  //}
911  } break;
912  default: {
913  // Will only happen if clang implementation changes.
914  // Protect ourselves in case that happens.
915  ::Error("TClingCallFunc::make_wrapper", "Unhandled template kind!");
916  return 0;
917  } break;
918  }
919  }
920  unsigned min_args = GetMinRequiredArguments();
921  unsigned num_params = FD->getNumParams();
922  //
923  // Make the wrapper name.
924  //
925  {
926  ostringstream buf;
927  buf << "__cf";
928  // const NamedDecl* ND = dyn_cast<NamedDecl>(FD);
929  // string mn;
930  // fInterp->maybeMangleDeclName(ND, mn);
931  // buf << '_' << mn;
932  buf << '_' << gWrapperSerial++;
933  wrapper_name = buf.str();
934  }
935  //
936  // Write the wrapper code.
937  // FIXME: this should be synthesized into the AST!
938  //
939  int indent_level = 0;
940  ostringstream buf;
941  buf << "#pragma clang diagnostic push\n"
942  "#pragma clang diagnostic ignored \"-Wformat-security\"\n"
943  "__attribute__((used)) "
944  "extern \"C\" void ";
945  buf << wrapper_name;
946  buf << "(void* obj, int nargs, void** args, void* ret)\n"
947  "{\n";
948  ++indent_level;
949  if (min_args == num_params) {
950  // No parameters with defaults.
951  make_narg_call_with_return(num_params, class_name, buf, indent_level);
952  } else {
953  // We need one function call clause compiled for every
954  // possible number of arguments per call.
955  for (unsigned N = min_args; N <= num_params; ++N) {
956  for (int i = 0; i < indent_level; ++i) {
957  buf << kIndentString;
958  }
959  buf << "if (nargs == " << N << ") {\n";
960  ++indent_level;
961  make_narg_call_with_return(N, class_name, buf, indent_level);
962  --indent_level;
963  for (int i = 0; i < indent_level; ++i) {
964  buf << kIndentString;
965  }
966  buf << "}\n";
967  }
968  }
969  --indent_level;
970  buf << "}\n"
971  "#pragma clang diagnostic pop";
972  wrapper = buf.str();
973  return 1;
974 }
975 
976 void TClingCallFunc::make_narg_call_with_return(const unsigned N, const string &class_name,
977  ostringstream &buf, int indent_level)
978 {
979  // Make a code string that follows this pattern:
980  //
981  // if (ret) {
982  // new (ret) (return_type) ((class_name*)obj)->func(args...);
983  // }
984  // else {
985  // ((class_name*)obj)->func(args...);
986  // }
987  //
988  const FunctionDecl *FD = GetDecl();
989  if (const CXXConstructorDecl *CD = dyn_cast<CXXConstructorDecl>(FD)) {
990  if (N <= 1 && llvm::isa<UsingShadowDecl>(GetFunctionOrShadowDecl())) {
991  auto SpecMemKind = fInterp->getSema().getSpecialMember(CD);
992  if ((N == 0 && SpecMemKind == clang::Sema::CXXDefaultConstructor) ||
993  (N == 1 &&
994  (SpecMemKind == clang::Sema::CXXCopyConstructor || SpecMemKind == clang::Sema::CXXMoveConstructor))) {
995  // Using declarations cannot inject special members; do not call them
996  // as such. This might happen by using `Base(Base&, int = 12)`, which
997  // is fine to be called as `Derived d(someBase, 42)` but not as
998  // copy constructor of `Derived`.
999  return;
1000  }
1001  }
1002  make_narg_ctor_with_return(N, class_name, buf, indent_level);
1003  return;
1004  }
1005  QualType QT = FD->getReturnType().getCanonicalType();
1006  if (QT->isVoidType()) {
1007  ostringstream typedefbuf;
1008  ostringstream callbuf;
1009  for (int i = 0; i < indent_level; ++i) {
1010  callbuf << kIndentString;
1011  }
1012  make_narg_call("void", N, typedefbuf, callbuf, class_name, indent_level);
1013  callbuf << ";\n";
1014  for (int i = 0; i < indent_level; ++i) {
1015  callbuf << kIndentString;
1016  }
1017  callbuf << "return;\n";
1018  buf << typedefbuf.str() << callbuf.str();
1019  } else {
1020  for (int i = 0; i < indent_level; ++i) {
1021  buf << kIndentString;
1022  }
1023 
1024  string type_name;
1025  EReferenceType refType = kNotReference;
1026  bool isPointer = false;
1027 
1028  buf << "if (ret) {\n";
1029  ++indent_level;
1030  {
1031  ostringstream typedefbuf;
1032  ostringstream callbuf;
1033  //
1034  // Write the placement part of the placement new.
1035  //
1036  for (int i = 0; i < indent_level; ++i) {
1037  callbuf << kIndentString;
1038  }
1039  callbuf << "new (ret) ";
1040  collect_type_info(QT, typedefbuf, callbuf, type_name,
1041  refType, isPointer, indent_level, false);
1042  //
1043  // Write the type part of the placement new.
1044  //
1045  callbuf << "(" << type_name.c_str();
1046  if (refType != kNotReference) {
1047  callbuf << "*) (&";
1048  type_name += "&";
1049  } else if (isPointer) {
1050  callbuf << "*) (";
1051  type_name += "*";
1052  } else {
1053  callbuf << ") (";
1054  }
1055  //
1056  // Write the actual function call.
1057  //
1058  make_narg_call(type_name, N, typedefbuf, callbuf, class_name, indent_level);
1059  //
1060  // End the placement new.
1061  //
1062  callbuf << ");\n";
1063  for (int i = 0; i < indent_level; ++i) {
1064  callbuf << kIndentString;
1065  }
1066  callbuf << "return;\n";
1067  //
1068  // Output the whole placement new expression and return statement.
1069  //
1070  buf << typedefbuf.str() << callbuf.str();
1071  }
1072  --indent_level;
1073  for (int i = 0; i < indent_level; ++i) {
1074  buf << kIndentString;
1075  }
1076  buf << "}\n";
1077  for (int i = 0; i < indent_level; ++i) {
1078  buf << kIndentString;
1079  }
1080  buf << "else {\n";
1081  ++indent_level;
1082  {
1083  ostringstream typedefbuf;
1084  ostringstream callbuf;
1085  for (int i = 0; i < indent_level; ++i) {
1086  callbuf << kIndentString;
1087  }
1088  make_narg_call(type_name, N, typedefbuf, callbuf, class_name, indent_level);
1089  callbuf << ";\n";
1090  for (int i = 0; i < indent_level; ++i) {
1091  callbuf << kIndentString;
1092  }
1093  callbuf << "return;\n";
1094  buf << typedefbuf.str() << callbuf.str();
1095  }
1096  --indent_level;
1097  for (int i = 0; i < indent_level; ++i) {
1098  buf << kIndentString;
1099  }
1100  buf << "}\n";
1101  }
1102 }
1103 
1104 tcling_callfunc_Wrapper_t TClingCallFunc::make_wrapper()
1105 {
1106  R__LOCKGUARD_CLING(gInterpreterMutex);
1107 
1108  const Decl *D = GetFunctionOrShadowDecl();
1109  string wrapper_name;
1110  string wrapper;
1111 
1112  if (get_wrapper_code(wrapper_name, wrapper) == 0) return 0;
1113 
1114  //fprintf(stderr, "%s\n", wrapper.c_str());
1115  //
1116  // Compile the wrapper code.
1117  //
1118  void *F = compile_wrapper(wrapper_name, wrapper);
1119  if (F) {
1120  gWrapperStore.insert(make_pair(D, F));
1121  } else {
1122  ::Error("TClingCallFunc::make_wrapper",
1123  "Failed to compile\n ==== SOURCE BEGIN ====\n%s\n ==== SOURCE END ====",
1124  wrapper.c_str());
1125  }
1126  return (tcling_callfunc_Wrapper_t)F;
1127 }
1128 
1129 tcling_callfunc_ctor_Wrapper_t TClingCallFunc::make_ctor_wrapper(const TClingClassInfo *info,
1130  ROOT::TMetaUtils::EIOCtorCategory kind, const std::string &type_name)
1131 {
1132  // Make a code string that follows this pattern:
1133  //
1134  // void
1135  // unique_wrapper_ddd(void** ret, void* arena, unsigned long nary)
1136  // {
1137  // if (!arena) {
1138  // if (!nary) {
1139  // *ret = new ClassName;
1140  // }
1141  // else {
1142  // *ret = new ClassName[nary];
1143  // }
1144  // }
1145  // else {
1146  // if (!nary) {
1147  // *ret = new (arena) ClassName;
1148  // }
1149  // else {
1150  // *ret = new (arena) ClassName[nary];
1151  // }
1152  // }
1153  // }
1154  //
1155  // When I/O constructor used:
1156  //
1157  // void
1158  // unique_wrapper_ddd(void** ret, void* arena, unsigned long nary)
1159  // {
1160  // if (!arena) {
1161  // if (!nary) {
1162  // *ret = new ClassName((TRootIOCtor*)nullptr);
1163  // }
1164  // else {
1165  // char *buf = malloc(nary * sizeof(ClassName));
1166  // for (int k=0;k<nary;++k)
1167  // new (buf + k * sizeof(ClassName)) ClassName((TRootIOCtor*)nullptr);
1168  // *ret = buf;
1169  // }
1170  // }
1171  // else {
1172  // if (!nary) {
1173  // *ret = new (arena) ClassName((TRootIOCtor*)nullptr);
1174  // }
1175  // else {
1176  // for (int k=0;k<nary;++k)
1177  // new ((char *) arena + k * sizeof(ClassName)) ClassName((TRootIOCtor*)nullptr);
1178  // *ret = arena;
1179  // }
1180  // }
1181  // }
1182  //
1183  //
1184  // Note:
1185  //
1186  // If the class is of POD type, the form:
1187  //
1188  // new ClassName;
1189  //
1190  // does not initialize the object at all, and the form:
1191  //
1192  // new ClassName();
1193  //
1194  // default-initializes the object.
1195  //
1196  // We are using the form without parentheses because that is what
1197  // CINT did.
1198  //
1199  //--
1200  ASTContext &Context = info->GetDecl()->getASTContext();
1201  PrintingPolicy Policy(Context.getPrintingPolicy());
1202  Policy.SuppressTagKeyword = true;
1203  Policy.SuppressUnwrittenScope = true;
1204  //
1205  // Get the class or namespace name.
1206  //
1207  string class_name;
1208  if (const TypeDecl *TD = dyn_cast<TypeDecl>(info->GetDecl())) {
1209  // This is a class, struct, or union member.
1210  QualType QT(TD->getTypeForDecl(), 0);
1211  ROOT::TMetaUtils::GetNormalizedName(class_name, QT, *fInterp, fNormCtxt);
1212  } else if (const NamedDecl *ND = dyn_cast<NamedDecl>(info->GetDecl())) {
1213  // This is a namespace member.
1214  raw_string_ostream stream(class_name);
1215  ND->getNameForDiagnostic(stream, Policy, /*Qualified=*/true);
1216  stream.flush();
1217  }
1218 
1219 
1220  //
1221  // Make the wrapper name.
1222  //
1223  string wrapper_name;
1224  {
1225  ostringstream buf;
1226  buf << "__ctor";
1227  //const NamedDecl* ND = dyn_cast<NamedDecl>(FD);
1228  //string mn;
1229  //fInterp->maybeMangleDeclName(ND, mn);
1230  //buf << '_dtor_' << mn;
1231  buf << '_' << gWrapperSerial++;
1232  wrapper_name = buf.str();
1233  }
1234 
1235  string constr_arg;
1236  if (kind == ROOT::TMetaUtils::EIOCtorCategory::kIOPtrType)
1237  constr_arg = string("((") + type_name + "*)nullptr)";
1238  else if (kind == ROOT::TMetaUtils::EIOCtorCategory::kIORefType)
1239  constr_arg = string("(*((") + type_name + "*)arena))";
1240 
1241  //
1242  // Write the wrapper code.
1243  //
1244  int indent_level = 0;
1245  ostringstream buf;
1246  buf << "__attribute__((used)) ";
1247  buf << "extern \"C\" void ";
1248  buf << wrapper_name;
1249  buf << "(void** ret, void* arena, unsigned long nary)\n";
1250  buf << "{\n";
1251 
1252  // if (!arena) {
1253  // if (!nary) {
1254  // *ret = new ClassName;
1255  // }
1256  // else {
1257  // *ret = new ClassName[nary];
1258  // }
1259  // }
1260  indent(buf, ++indent_level);
1261  buf << "if (!arena) {\n";
1262  indent(buf, ++indent_level);
1263  buf << "if (!nary) {\n";
1264  indent(buf, ++indent_level);
1265  buf << "*ret = new " << class_name << constr_arg << ";\n";
1266  indent(buf, --indent_level);
1267  buf << "}\n";
1268  indent(buf, indent_level);
1269  buf << "else {\n";
1270  indent(buf, ++indent_level);
1271  if (constr_arg.empty()) {
1272  buf << "*ret = new " << class_name << "[nary];\n";
1273  } else {
1274  buf << "char *buf = (char *) malloc(nary * sizeof(" << class_name << "));\n";
1275  indent(buf, indent_level);
1276  buf << "for (int k=0;k<nary;++k)\n";
1277  indent(buf, ++indent_level);
1278  buf << "new (buf + k * sizeof(" << class_name << ")) " << class_name << constr_arg << ";\n";
1279  indent(buf, --indent_level);
1280  buf << "*ret = buf;\n";
1281  }
1282  indent(buf, --indent_level);
1283  buf << "}\n";
1284  indent(buf, --indent_level);
1285  buf << "}\n";
1286  // else {
1287  // if (!nary) {
1288  // *ret = new (arena) ClassName;
1289  // }
1290  // else {
1291  // *ret = new (arena) ClassName[nary];
1292  // }
1293  // }
1294  indent(buf, indent_level);
1295  buf << "else {\n";
1296  indent(buf, ++indent_level);
1297  buf << "if (!nary) {\n";
1298  indent(buf, ++indent_level);
1299  buf << "*ret = new (arena) " << class_name << constr_arg << ";\n";
1300  indent(buf, --indent_level);
1301  buf << "}\n";
1302  indent(buf, indent_level);
1303  buf << "else {\n";
1304  indent(buf, ++indent_level);
1305  if (constr_arg.empty()) {
1306  buf << "*ret = new (arena) " << class_name << "[nary];\n";
1307  } else {
1308  buf << "for (int k=0;k<nary;++k)\n";
1309  indent(buf, ++indent_level);
1310  buf << "new ((char *) arena + k * sizeof(" << class_name << ")) " << class_name << constr_arg << ";\n";
1311  indent(buf, --indent_level);
1312  buf << "*ret = arena;\n";
1313  }
1314  indent(buf, --indent_level);
1315  buf << "}\n";
1316  indent(buf, --indent_level);
1317  buf << "}\n";
1318  // End wrapper.
1319  --indent_level;
1320  buf << "}\n";
1321  // Done.
1322  string wrapper(buf.str());
1323  //fprintf(stderr, "%s\n", wrapper.c_str());
1324  //
1325  // Compile the wrapper code.
1326  //
1327  void *F = compile_wrapper(wrapper_name, wrapper,
1328  /*withAccessControl=*/false);
1329  if (F) {
1330  gCtorWrapperStore.insert(make_pair(info->GetDecl(), F));
1331  } else {
1332  ::Error("TClingCallFunc::make_ctor_wrapper",
1333  "Failed to compile\n ==== SOURCE BEGIN ====\n%s\n ==== SOURCE END ====",
1334  wrapper.c_str());
1335  }
1336  return (tcling_callfunc_ctor_Wrapper_t)F;
1337 }
1338 
1339 tcling_callfunc_dtor_Wrapper_t
1340 TClingCallFunc::make_dtor_wrapper(const TClingClassInfo *info)
1341 {
1342  // Make a code string that follows this pattern:
1343  //
1344  // void
1345  // unique_wrapper_ddd(void* obj, unsigned long nary, int withFree)
1346  // {
1347  // if (withFree) {
1348  // if (!nary) {
1349  // delete (ClassName*) obj;
1350  // }
1351  // else {
1352  // delete[] (ClassName*) obj;
1353  // }
1354  // }
1355  // else {
1356  // typedef ClassName DtorName;
1357  // if (!nary) {
1358  // ((ClassName*)obj)->~DtorName();
1359  // }
1360  // else {
1361  // for (unsigned long i = nary - 1; i > -1; --i) {
1362  // (((ClassName*)obj)+i)->~DtorName();
1363  // }
1364  // }
1365  // }
1366  // }
1367  //
1368  //--
1369  ASTContext &Context = info->GetDecl()->getASTContext();
1370  PrintingPolicy Policy(Context.getPrintingPolicy());
1371  Policy.SuppressTagKeyword = true;
1372  Policy.SuppressUnwrittenScope = true;
1373  //
1374  // Get the class or namespace name.
1375  //
1376  string class_name;
1377  if (const TypeDecl *TD = dyn_cast<TypeDecl>(info->GetDecl())) {
1378  // This is a class, struct, or union member.
1379  QualType QT(TD->getTypeForDecl(), 0);
1380  ROOT::TMetaUtils::GetNormalizedName(class_name, QT, *fInterp, fNormCtxt);
1381  } else if (const NamedDecl *ND = dyn_cast<NamedDecl>(info->GetDecl())) {
1382  // This is a namespace member.
1383  raw_string_ostream stream(class_name);
1384  ND->getNameForDiagnostic(stream, Policy, /*Qualified=*/true);
1385  stream.flush();
1386  }
1387  //
1388  // Make the wrapper name.
1389  //
1390  string wrapper_name;
1391  {
1392  ostringstream buf;
1393  buf << "__dtor";
1394  //const NamedDecl* ND = dyn_cast<NamedDecl>(FD);
1395  //string mn;
1396  //fInterp->maybeMangleDeclName(ND, mn);
1397  //buf << '_dtor_' << mn;
1398  buf << '_' << gWrapperSerial++;
1399  wrapper_name = buf.str();
1400  }
1401  //
1402  // Write the wrapper code.
1403  //
1404  int indent_level = 0;
1405  ostringstream buf;
1406  buf << "__attribute__((used)) ";
1407  buf << "extern \"C\" void ";
1408  buf << wrapper_name;
1409  buf << "(void* obj, unsigned long nary, int withFree)\n";
1410  buf << "{\n";
1411  // if (withFree) {
1412  // if (!nary) {
1413  // delete (ClassName*) obj;
1414  // }
1415  // else {
1416  // delete[] (ClassName*) obj;
1417  // }
1418  // }
1419  ++indent_level;
1420  indent(buf, indent_level);
1421  buf << "if (withFree) {\n";
1422  ++indent_level;
1423  indent(buf, indent_level);
1424  buf << "if (!nary) {\n";
1425  ++indent_level;
1426  indent(buf, indent_level);
1427  buf << "delete (" << class_name << "*) obj;\n";
1428  --indent_level;
1429  indent(buf, indent_level);
1430  buf << "}\n";
1431  indent(buf, indent_level);
1432  buf << "else {\n";
1433  ++indent_level;
1434  indent(buf, indent_level);
1435  buf << "delete[] (" << class_name << "*) obj;\n";
1436  --indent_level;
1437  indent(buf, indent_level);
1438  buf << "}\n";
1439  --indent_level;
1440  indent(buf, indent_level);
1441  buf << "}\n";
1442  // else {
1443  // typedef ClassName Nm;
1444  // if (!nary) {
1445  // ((Nm*)obj)->~Nm();
1446  // }
1447  // else {
1448  // for (unsigned long i = nary - 1; i > -1; --i) {
1449  // (((Nm*)obj)+i)->~Nm();
1450  // }
1451  // }
1452  // }
1453  indent(buf, indent_level);
1454  buf << "else {\n";
1455  ++indent_level;
1456  indent(buf, indent_level);
1457  buf << "typedef " << class_name << " Nm;\n";
1458  buf << "if (!nary) {\n";
1459  ++indent_level;
1460  indent(buf, indent_level);
1461  buf << "((Nm*)obj)->~Nm();\n";
1462  --indent_level;
1463  indent(buf, indent_level);
1464  buf << "}\n";
1465  indent(buf, indent_level);
1466  buf << "else {\n";
1467  ++indent_level;
1468  indent(buf, indent_level);
1469  buf << "do {\n";
1470  ++indent_level;
1471  indent(buf, indent_level);
1472  buf << "(((Nm*)obj)+(--nary))->~Nm();\n";
1473  --indent_level;
1474  indent(buf, indent_level);
1475  buf << "} while (nary);\n";
1476  --indent_level;
1477  indent(buf, indent_level);
1478  buf << "}\n";
1479  --indent_level;
1480  indent(buf, indent_level);
1481  buf << "}\n";
1482  // End wrapper.
1483  --indent_level;
1484  buf << "}\n";
1485  // Done.
1486  string wrapper(buf.str());
1487  //fprintf(stderr, "%s\n", wrapper.c_str());
1488  //
1489  // Compile the wrapper code.
1490  //
1491  void *F = compile_wrapper(wrapper_name, wrapper,
1492  /*withAccessControl=*/false);
1493  if (F) {
1494  gDtorWrapperStore.insert(make_pair(info->GetDecl(), F));
1495  } else {
1496  ::Error("TClingCallFunc::make_dtor_wrapper",
1497  "Failed to compile\n ==== SOURCE BEGIN ====\n%s\n ==== SOURCE END ====",
1498  wrapper.c_str());
1499  }
1500 
1501  return (tcling_callfunc_dtor_Wrapper_t)F;
1502 }
1503 
1504 class ValHolder {
1505 public:
1506  union {
1507  long double ldbl;
1508  double dbl;
1509  float flt;
1510  //__uint128_t ui128;
1511  //__int128_t i128;
1512  unsigned long long ull;
1513  long long ll;
1514  unsigned long ul;
1515  long l;
1516  unsigned int ui;
1517  int i;
1518  unsigned short us;
1519  short s;
1520  //char32_t c32;
1521  //char16_t c16;
1522  //unsigned wchar_t uwc; - non-standard
1523  wchar_t wc;
1524  unsigned char uc;
1525  signed char sc;
1526  char c;
1527  bool b;
1528  void *vp;
1529  } u;
1530 };
1531 
1532 void TClingCallFunc::exec(void *address, void *ret)
1533 {
1534  SmallVector<ValHolder, 8> vh_ary;
1535  SmallVector<void *, 8> vp_ary;
1536 
1537  unsigned num_args = fArgVals.size();
1538  {
1539  R__LOCKGUARD_CLING(gInterpreterMutex);
1540 
1541  const FunctionDecl *FD = GetDecl();
1542 
1543  //
1544  // Convert the arguments from cling::Value to their
1545  // actual type and store them in a holder for passing to the
1546  // wrapper function by pointer to value.
1547  //
1548  unsigned num_params = FD->getNumParams();
1549 
1550  if (num_args < GetMinRequiredArguments()) {
1551  ::Error("TClingCallFunc::exec",
1552  "Not enough arguments provided for %s (%d instead of the minimum %d)",
1553  fMethod->Name(),
1554  num_args, (int)GetMinRequiredArguments());
1555  return;
1556  }
1557  if (address == 0 && dyn_cast<CXXMethodDecl>(FD)
1558  && !(dyn_cast<CXXMethodDecl>(FD))->isStatic()
1559  && !dyn_cast<CXXConstructorDecl>(FD)) {
1560  ::Error("TClingCallFunc::exec",
1561  "The method %s is called without an object.",
1562  fMethod->Name());
1563  return;
1564  }
1565  vh_ary.reserve(num_args);
1566  vp_ary.reserve(num_args);
1567  for (unsigned i = 0U; i < num_args; ++i) {
1568  QualType Ty;
1569  if (i < num_params) {
1570  const ParmVarDecl *PVD = FD->getParamDecl(i);
1571  Ty = PVD->getType();
1572  } else {
1573  Ty = fArgVals[i].getType();
1574  }
1575  QualType QT = Ty.getCanonicalType();
1576  if (const BuiltinType *BT =
1577  dyn_cast<BuiltinType>(&*QT)) {
1578  //
1579  // WARNING!!!
1580  //
1581  // This switch is organized in order-of-declaration
1582  // so that the produced assembly code is optimal.
1583  // Do not reorder!
1584  //
1585  switch (BT->getKind()) {
1586  //
1587  // Builtin Types
1588  //
1589  case BuiltinType::Void: {
1590  // void
1591  ::Error("TClingCallFunc::exec(void*)",
1592  "Invalid type 'Void'!");
1593  return;
1594  }
1595  break;
1596  //
1597  // Unsigned Types
1598  //
1599  case BuiltinType::Bool: {
1600  // bool
1601  ValHolder vh;
1602  vh.u.b = (bool) sv_to_ulong_long(fArgVals[i]);
1603  vh_ary.push_back(vh);
1604  vp_ary.push_back(&vh_ary.back());
1605  }
1606  break;
1607  case BuiltinType::Char_U: {
1608  // char on targets where it is unsigned
1609  ValHolder vh;
1610  vh.u.c = (char) sv_to_ulong_long(fArgVals[i]);
1611  vh_ary.push_back(vh);
1612  vp_ary.push_back(&vh_ary.back());
1613  }
1614  break;
1615  case BuiltinType::UChar: {
1616  // unsigned char
1617  ValHolder vh;
1618  vh.u.uc = (unsigned char) sv_to_ulong_long(fArgVals[i]);
1619  vh_ary.push_back(vh);
1620  vp_ary.push_back(&vh_ary.back());
1621  }
1622  break;
1623  case BuiltinType::WChar_U: {
1624  // wchar_t on targets where it is unsigned.
1625  // The standard doesn't allow to specify signednedd of wchar_t
1626  // thus this maps simply to wchar_t.
1627  ValHolder vh;
1628  vh.u.wc = (wchar_t) sv_to_ulong_long(fArgVals[i]);
1629  vh_ary.push_back(vh);
1630  vp_ary.push_back(&vh_ary.back());
1631  }
1632  break;
1633  case BuiltinType::Char16: {
1634  // char16_t
1635  //ValHolder vh;
1636  //vh.u.c16 = (char16_t) sv_to_ulong_long(fArgVals[i]);
1637  //vh_ary.push_back(vh);
1638  //vp_ary.push_back(&vh_ary.back());
1639  }
1640  break;
1641  case BuiltinType::Char32: {
1642  // char32_t
1643  //ValHolder vh;
1644  //vh.u.c32 = (char32_t) sv_to_ulong_long(fArgVals[i]);
1645  //vh_ary.push_back(vh);
1646  //vp_ary.push_back(&vh_ary.back());
1647  }
1648  break;
1649  case BuiltinType::UShort: {
1650  // unsigned short
1651  ValHolder vh;
1652  vh.u.us = (unsigned short) sv_to_ulong_long(fArgVals[i]);
1653  vh_ary.push_back(vh);
1654  vp_ary.push_back(&vh_ary.back());
1655  }
1656  break;
1657  case BuiltinType::UInt: {
1658  // unsigned int
1659  ValHolder vh;
1660  vh.u.ui = (unsigned int) sv_to_ulong_long(fArgVals[i]);
1661  vh_ary.push_back(vh);
1662  vp_ary.push_back(&vh_ary.back());
1663  }
1664  break;
1665  case BuiltinType::ULong: {
1666  // unsigned long
1667  ValHolder vh;
1668  vh.u.ul = (unsigned long) sv_to_ulong_long(fArgVals[i]);
1669  vh_ary.push_back(vh);
1670  vp_ary.push_back(&vh_ary.back());
1671  }
1672  break;
1673  case BuiltinType::ULongLong: {
1674  // unsigned long long
1675  ValHolder vh;
1676  vh.u.ull = (unsigned long long) sv_to_ulong_long(fArgVals[i]);
1677  vh_ary.push_back(vh);
1678  vp_ary.push_back(&vh_ary.back());
1679  }
1680  break;
1681  case BuiltinType::UInt128: {
1682  // __uint128_t
1683  }
1684  break;
1685  //
1686  // Signed Types
1687  //
1688  //
1689  // Signed Types
1690  //
1691  case BuiltinType::Char_S: {
1692  // char on targets where it is signed
1693  ValHolder vh;
1694  vh.u.c = (char) sv_to_long_long(fArgVals[i]);
1695  vh_ary.push_back(vh);
1696  vp_ary.push_back(&vh_ary.back());
1697  }
1698  break;
1699  case BuiltinType::SChar: {
1700  // signed char
1701  ValHolder vh;
1702  vh.u.sc = (signed char) sv_to_long_long(fArgVals[i]);
1703  vh_ary.push_back(vh);
1704  vp_ary.push_back(&vh_ary.back());
1705  }
1706  break;
1707  case BuiltinType::WChar_S: {
1708  // wchar_t on targets where it is signed.
1709  // The standard doesn't allow to specify signednedd of wchar_t
1710  // thus this maps simply to wchar_t.
1711  ValHolder vh;
1712  vh.u.wc = (wchar_t) sv_to_long_long(fArgVals[i]);
1713  vh_ary.push_back(vh);
1714  vp_ary.push_back(&vh_ary.back());
1715  }
1716  break;
1717  case BuiltinType::Short: {
1718  // short
1719  ValHolder vh;
1720  vh.u.s = (short) sv_to_long_long(fArgVals[i]);
1721  vh_ary.push_back(vh);
1722  vp_ary.push_back(&vh_ary.back());
1723  }
1724  break;
1725  case BuiltinType::Int: {
1726  // int
1727  ValHolder vh;
1728  vh.u.i = (int) sv_to_long_long(fArgVals[i]);
1729  vh_ary.push_back(vh);
1730  vp_ary.push_back(&vh_ary.back());
1731  }
1732  break;
1733  case BuiltinType::Long: {
1734  // long
1735  ValHolder vh;
1736  vh.u.l = (long) sv_to_long_long(fArgVals[i]);
1737  vh_ary.push_back(vh);
1738  vp_ary.push_back(&vh_ary.back());
1739  }
1740  break;
1741  case BuiltinType::LongLong: {
1742  // long long
1743  ValHolder vh;
1744  vh.u.ll = (long long) sv_to_long_long(fArgVals[i]);
1745  vh_ary.push_back(vh);
1746  vp_ary.push_back(&vh_ary.back());
1747  }
1748  break;
1749  case BuiltinType::Int128: {
1750  // __int128_t
1751  ::Error("TClingCallFunc::exec(void*)",
1752  "Invalid type 'Int128'!");
1753  return;
1754  }
1755  break;
1756  case BuiltinType::Half: {
1757  // half in OpenCL, __fp16 in ARM NEON
1758  ::Error("TClingCallFunc::exec(void*)",
1759  "Invalid type 'Half'!");
1760  return;
1761  }
1762  break;
1763  case BuiltinType::Float: {
1764  // float
1765  ValHolder vh;
1766  vh.u.flt = sv_to<float>(fArgVals[i]);
1767  vh_ary.push_back(vh);
1768  vp_ary.push_back(&vh_ary.back());
1769  }
1770  break;
1771  case BuiltinType::Double: {
1772  // double
1773  ValHolder vh;
1774  vh.u.dbl = sv_to<double>(fArgVals[i]);
1775  vh_ary.push_back(vh);
1776  vp_ary.push_back(&vh_ary.back());
1777  }
1778  break;
1779  case BuiltinType::LongDouble: {
1780  // long double
1781  ValHolder vh;
1782  vh.u.ldbl = sv_to<long double>(fArgVals[i]);
1783  vh_ary.push_back(vh);
1784  vp_ary.push_back(&vh_ary.back());
1785  }
1786  break;
1787  //
1788  // Language-Specific Types
1789  //
1790  case BuiltinType::NullPtr: {
1791  // C++11 nullptr
1792  ValHolder vh;
1793  vh.u.vp = fArgVals[i].getPtr();
1794  vh_ary.push_back(vh);
1795  vp_ary.push_back(&vh_ary.back());
1796  }
1797  break;
1798  default: {
1799  // There should be no others. This is here in case
1800  // this changes in the future.
1801  ::Error("TClingCallFunc::exec(void*)",
1802  "Unhandled builtin type!");
1803  QT->dump();
1804  return;
1805  }
1806  break;
1807  }
1808  } else if (QT->isReferenceType()) {
1809  // the argument is already a pointer value (point to the same thing
1810  // as the reference.
1811  vp_ary.push_back((void *) sv_to_ulong_long(fArgVals[i]));
1812  } else if (QT->isPointerType() || QT->isArrayType()) {
1813  ValHolder vh;
1814  vh.u.vp = (void *) sv_to_ulong_long(fArgVals[i]);
1815  vh_ary.push_back(vh);
1816  vp_ary.push_back(&vh_ary.back());
1817  } else if (QT->isRecordType()) {
1818  // the argument is already a pointer value (pointing to object passed
1819  // by value).
1820  vp_ary.push_back((void *) sv_to_ulong_long(fArgVals[i]));
1821  } else if (const EnumType *ET =
1822  dyn_cast<EnumType>(&*QT)) {
1823  // Note: We may need to worry about the underlying type
1824  // of the enum here.
1825  (void) ET;
1826  ValHolder vh;
1827  vh.u.i = (int) sv_to_long_long(fArgVals[i]);
1828  vh_ary.push_back(vh);
1829  vp_ary.push_back(&vh_ary.back());
1830  } else if (QT->isMemberPointerType()) {
1831  ValHolder vh;
1832  vh.u.vp = (void *) sv_to_ulong_long(fArgVals[i]);
1833  vh_ary.push_back(vh);
1834  vp_ary.push_back(&vh_ary.back());
1835  } else {
1836  ::Error("TClingCallFunc::exec(void*)",
1837  "Invalid type (unrecognized)!");
1838  QT->dump();
1839  return;
1840  }
1841  }
1842  } // End of scope holding the lock
1843  (*fWrapper)(address, (int)num_args, (void **)vp_ary.data(), ret);
1844 }
1845 
1846 template <typename T>
1847 void TClingCallFunc::execWithLL(void *address, cling::Value *val)
1848 {
1849  T ret; // leave uninit for valgrind's sake!
1850  exec(address, &ret);
1851  val->getLL() = ret;
1852 }
1853 
1854 template <typename T>
1855 void TClingCallFunc::execWithULL(void *address, cling::Value *val)
1856 {
1857  T ret; // leave uninit for valgrind's sake!
1858  exec(address, &ret);
1859  val->getULL() = ret;
1860 }
1861 
1862 // Handle integral types.
1863 template <class T>
1864 TClingCallFunc::ExecWithRetFunc_t TClingCallFunc::InitRetAndExecIntegral(QualType QT, cling::Value &ret)
1865 {
1866  ret = cling::Value::Create<T>(QT.getAsOpaquePtr(), *fInterp);
1867  static_assert(std::is_integral<T>::value, "Must be called with integral T");
1868  if (std::is_signed<T>::value)
1869  return [this](void* address, cling::Value& ret) { execWithLL<T>(address, &ret); };
1870  else
1871  return [this](void* address, cling::Value& ret) { execWithULL<T>(address, &ret); };
1872 }
1873 
1874 // Handle builtin types.
1875 TClingCallFunc::ExecWithRetFunc_t
1876 TClingCallFunc::InitRetAndExecBuiltin(QualType QT, const clang::BuiltinType *BT, cling::Value &ret) {
1877  switch (BT->getKind()) {
1878  case BuiltinType::Void: {
1879  ret = cling::Value::Create<void>(QT.getAsOpaquePtr(), *fInterp);
1880  return [this](void* address, cling::Value& ret) { exec(address, 0); };
1881  break;
1882  }
1883 
1884  //
1885  // Unsigned Types
1886  //
1887  case BuiltinType::Bool:
1888  return InitRetAndExecIntegral<bool>(QT, ret);
1889  break;
1890  case BuiltinType::Char_U: // char on targets where it is unsigned
1891  case BuiltinType::UChar:
1892  return InitRetAndExecIntegral<char>(QT, ret);
1893  break;
1894  case BuiltinType::WChar_U:
1895  return InitRetAndExecIntegral<wchar_t>(QT, ret);
1896  break;
1897  case BuiltinType::Char16:
1898  ::Error("TClingCallFunc::InitRetAndExecBuiltin",
1899  "Invalid type 'char16_t'!");
1900  return {};
1901  break;
1902  case BuiltinType::Char32:
1903  ::Error("TClingCallFunc::InitRetAndExecBuiltin",
1904  "Invalid type 'char32_t'!");
1905  return {};
1906  break;
1907  case BuiltinType::UShort:
1908  return InitRetAndExecIntegral<unsigned short>(QT, ret);
1909  break;
1910  case BuiltinType::UInt:
1911  return InitRetAndExecIntegral<unsigned int>(QT, ret);
1912  break;
1913  case BuiltinType::ULong:
1914  return InitRetAndExecIntegral<unsigned long>(QT, ret);
1915  break;
1916  case BuiltinType::ULongLong:
1917  return InitRetAndExecIntegral<unsigned long long>(QT, ret);
1918  break;
1919  case BuiltinType::UInt128: {
1920  ::Error("TClingCallFunc::InitRetAndExecBuiltin",
1921  "Invalid type '__uint128_t'!");
1922  return {};
1923  }
1924  break;
1925 
1926  //
1927  // Signed Types
1928  //
1929  case BuiltinType::Char_S: // char on targets where it is signed
1930  case BuiltinType::SChar:
1931  return InitRetAndExecIntegral<signed char>(QT, ret);
1932  break;
1933  case BuiltinType::WChar_S:
1934  // wchar_t on targets where it is signed.
1935  // The standard doesn't allow to specify signednedd of wchar_t
1936  // thus this maps simply to wchar_t.
1937  return InitRetAndExecIntegral<wchar_t>(QT, ret);
1938  break;
1939  case BuiltinType::Short:
1940  return InitRetAndExecIntegral<short>(QT, ret);
1941  break;
1942  case BuiltinType::Int:
1943  return InitRetAndExecIntegral<int>(QT, ret);
1944  break;
1945  case BuiltinType::Long:
1946  return InitRetAndExecIntegral<long>(QT, ret);
1947  break;
1948  case BuiltinType::LongLong:
1949  return InitRetAndExecIntegral<long long>(QT, ret);
1950  break;
1951  case BuiltinType::Int128:
1952  ::Error("TClingCallFunc::InitRetAndExecBuiltin",
1953  "Invalid type '__int128_t'!");
1954  return {};
1955  break;
1956  case BuiltinType::Half:
1957  // half in OpenCL, __fp16 in ARM NEON
1958  ::Error("TClingCallFunc::InitRetAndExecBuiltin",
1959  "Invalid type 'Half'!");
1960  return {};
1961  break;
1962  case BuiltinType::Float: {
1963  ret = cling::Value::Create<float>(QT.getAsOpaquePtr(), *fInterp);
1964  return [this](void* address, cling::Value& ret) { exec(address, &ret.getFloat()); };
1965  break;
1966  }
1967  case BuiltinType::Double: {
1968  ret = cling::Value::Create<double>(QT.getAsOpaquePtr(), *fInterp);
1969  return [this](void* address, cling::Value& ret) { exec(address, &ret.getDouble()); };
1970  break;
1971  }
1972  case BuiltinType::LongDouble: {
1973  ret = cling::Value::Create<long double>(QT.getAsOpaquePtr(), *fInterp);
1974  return [this](void* address, cling::Value& ret) { exec(address, &ret.getLongDouble()); };
1975  break;
1976  }
1977  //
1978  // Language-Specific Types
1979  //
1980  case BuiltinType::NullPtr:
1981  // C++11 nullptr
1982  ::Error("TClingCallFunc::InitRetAndExecBuiltin",
1983  "Invalid type 'nullptr'!");
1984  return {};
1985  break;
1986  default:
1987  break;
1988  }
1989  return {};
1990 }
1991 
1992 
1993 TClingCallFunc::ExecWithRetFunc_t
1994 TClingCallFunc::InitRetAndExecNoCtor(clang::QualType QT, cling::Value &ret) {
1995  if (QT->isReferenceType()) {
1996  ret = cling::Value(QT, *fInterp);
1997  return [this](void* address, cling::Value& ret) { exec(address, &ret.getPtr()); };
1998  } else if (QT->isMemberPointerType()) {
1999  const MemberPointerType *MPT = QT->getAs<MemberPointerType>();
2000  if (MPT->isMemberDataPointer()) {
2001  // A member data pointer is a actually a struct with one
2002  // member of ptrdiff_t, the offset from the base of the object
2003  // storage to the storage for the designated data member.
2004  // But that's not relevant: we use it as a non-builtin, allocated
2005  // type.
2006  ret = cling::Value(QT, *fInterp);
2007  return [this](void* address, cling::Value& ret) { exec(address, ret.getPtr()); };
2008  }
2009  // We are a function member pointer.
2010  ret = cling::Value(QT, *fInterp);
2011  return [this](void* address, cling::Value& ret) { exec(address, &ret.getPtr()); };
2012  } else if (QT->isPointerType() || QT->isArrayType()) {
2013  // Note: ArrayType is an illegal function return value type.
2014  ret = cling::Value::Create<void*>(QT.getAsOpaquePtr(), *fInterp);
2015  return [this](void* address, cling::Value& ret) { exec(address, &ret.getPtr()); };
2016  } else if (QT->isRecordType()) {
2017  ret = cling::Value(QT, *fInterp);
2018  return [this](void* address, cling::Value& ret) { exec(address, ret.getPtr()); };
2019  } else if (const EnumType *ET = dyn_cast<EnumType>(&*QT)) {
2020  // Note: We may need to worry about the underlying type
2021  // of the enum here.
2022  (void) ET;
2023  ret = cling::Value(QT, *fInterp);
2024  return [this](void* address, cling::Value& ret) { execWithLL<int>(address, &ret); };
2025  } else if (const BuiltinType *BT = dyn_cast<BuiltinType>(&*QT)) {
2026  return InitRetAndExecBuiltin(QT, BT, ret);
2027  }
2028  ::Error("TClingCallFunc::exec_with_valref_return",
2029  "Unrecognized return type!");
2030  QT->dump();
2031  return {};
2032 }
2033 
2034 TClingCallFunc::ExecWithRetFunc_t
2035 TClingCallFunc::InitRetAndExec(const clang::FunctionDecl *FD, cling::Value &ret) {
2036  if (llvm::isa<CXXConstructorDecl>(FD)) {
2037  ASTContext &Context = FD->getASTContext();
2038  const TypeDecl *TD = dyn_cast<TypeDecl>(GetDeclContext());
2039  QualType ClassTy(TD->getTypeForDecl(), 0);
2040  QualType QT = Context.getLValueReferenceType(ClassTy);
2041  ret = cling::Value(QT, *fInterp);
2042  // Store the new()'ed address in getPtr()
2043  return [this](void* address, cling::Value& ret) { exec(address, &ret.getPtr()); };
2044  } else {
2045  QualType QT = FD->getReturnType().getCanonicalType();
2046  return InitRetAndExecNoCtor(QT, ret);
2047  }
2048 }
2049 
2050 void TClingCallFunc::exec_with_valref_return(void *address, cling::Value *ret)
2051 {
2052  if (!ret) {
2053  exec(address, 0);
2054  return;
2055  }
2056  std::function<void(void*, cling::Value&)> execFunc;
2057 
2058  /* Release lock during user function execution*/
2059  {
2060  R__LOCKGUARD_CLING(gInterpreterMutex);
2061  execFunc = InitRetAndExec(GetDecl(), *ret);
2062  }
2063 
2064  if (execFunc)
2065  execFunc(address, *ret);
2066  return;
2067 }
2068 
2069 void TClingCallFunc::EvaluateArgList(const string &ArgList)
2070 {
2071  R__LOCKGUARD_CLING(gInterpreterMutex);
2072 
2073  SmallVector<Expr *, 4> exprs;
2074  fInterp->getLookupHelper().findArgList(ArgList, exprs,
2075  gDebug > 5 ? cling::LookupHelper::WithDiagnostics
2076  : cling::LookupHelper::NoDiagnostics);
2077  for (SmallVectorImpl<Expr *>::const_iterator I = exprs.begin(),
2078  E = exprs.end(); I != E; ++I) {
2079  cling::Value val;
2080  EvaluateExpr(*fInterp, *I, val);
2081  if (!val.isValid()) {
2082  // Bad expression, all done.
2083  ::Error("TClingCallFunc::EvaluateArgList",
2084  "Bad expression in parameter %d of '%s'!",
2085  (int)(I - exprs.begin()),
2086  ArgList.c_str());
2087  return;
2088  }
2089  fArgVals.push_back(val);
2090  }
2091 }
2092 
2093 void TClingCallFunc::Exec(void *address, TInterpreterValue *interpVal/*=0*/)
2094 {
2095  IFacePtr();
2096  if (!fWrapper) {
2097  ::Error("TClingCallFunc::Exec(address, interpVal)",
2098  "Called with no wrapper, not implemented!");
2099  return;
2100  }
2101  if (!interpVal) {
2102  exec(address, 0);
2103  return;
2104  }
2105  cling::Value *val = reinterpret_cast<cling::Value *>(interpVal->GetValAddr());
2106  exec_with_valref_return(address, val);
2107 }
2108 
2109 template <typename T>
2110 T TClingCallFunc::ExecT(void *address)
2111 {
2112  IFacePtr();
2113  if (!fWrapper) {
2114  ::Error("TClingCallFunc::ExecT",
2115  "Called with no wrapper, not implemented!");
2116  return 0;
2117  }
2118  cling::Value ret;
2119  exec_with_valref_return(address, &ret);
2120  if (!ret.isValid()) {
2121  // Sometimes we are called on a function returning void!
2122  return 0;
2123  }
2124 
2125  if (fReturnIsRecordType)
2126  ((TCling *)gCling)->RegisterTemporary(ret);
2127  return sv_to<T>(ret);
2128 }
2129 
2130 Long_t TClingCallFunc::ExecInt(void *address)
2131 {
2132  return ExecT<long>(address);
2133 }
2134 
2135 long long TClingCallFunc::ExecInt64(void *address)
2136 {
2137  return ExecT<long long>(address);
2138 }
2139 
2140 double TClingCallFunc::ExecDouble(void *address)
2141 {
2142  return ExecT<double>(address);
2143 }
2144 
2145 void TClingCallFunc::ExecWithArgsAndReturn(void *address, const void *args[] /*= 0*/,
2146  int nargs /*= 0*/, void *ret/*= 0*/)
2147 {
2148  IFacePtr();
2149  if (!fWrapper) {
2150  ::Error("TClingCallFunc::ExecWithArgsAndReturn(address, args, ret)",
2151  "Called with no wrapper, not implemented!");
2152  return;
2153  }
2154  (*fWrapper)(address, nargs, const_cast<void **>(args), ret);
2155 }
2156 
2157 void TClingCallFunc::ExecWithReturn(void *address, void *ret/*= 0*/)
2158 {
2159  IFacePtr();
2160  if (!fWrapper) {
2161  ::Error("TClingCallFunc::ExecWithReturn(address, ret)",
2162  "Called with no wrapper, not implemented!");
2163  return;
2164  }
2165  exec(address, ret);
2166 }
2167 
2168 void *TClingCallFunc::ExecDefaultConstructor(const TClingClassInfo *info,
2169  ROOT::TMetaUtils::EIOCtorCategory kind,
2170  const std::string &type_name,
2171  void *address /*=0*/, unsigned long nary /*= 0UL*/)
2172 {
2173  if (!info->IsValid()) {
2174  ::Error("TClingCallFunc::ExecDefaultConstructor", "Invalid class info!");
2175  return nullptr;
2176  }
2177  tcling_callfunc_ctor_Wrapper_t wrapper = nullptr;
2178  {
2179  R__LOCKGUARD_CLING(gInterpreterMutex);
2180  auto D = info->GetDecl();
2181  //if (!info->HasDefaultConstructor()) {
2182  // // FIXME: We might have a ROOT ioctor, we might
2183  // // have to check for that here.
2184  // ::Error("TClingCallFunc::ExecDefaultConstructor",
2185  // "Class has no default constructor: %s",
2186  // info->Name());
2187  // return 0;
2188  //}
2189  auto I = gCtorWrapperStore.find(D);
2190  if (I != gCtorWrapperStore.end()) {
2191  wrapper = (tcling_callfunc_ctor_Wrapper_t) I->second;
2192  } else {
2193  wrapper = make_ctor_wrapper(info, kind, type_name);
2194  }
2195  }
2196  if (!wrapper) {
2197  ::Error("TClingCallFunc::ExecDefaultConstructor",
2198  "Called with no wrapper, not implemented!");
2199  return nullptr;
2200  }
2201  void *obj = 0;
2202  (*wrapper)(&obj, address, nary);
2203  return obj;
2204 }
2205 
2206 void TClingCallFunc::ExecDestructor(const TClingClassInfo *info, void *address /*=0*/,
2207  unsigned long nary /*= 0UL*/, bool withFree /*= true*/)
2208 {
2209  if (!info->IsValid()) {
2210  ::Error("TClingCallFunc::ExecDestructor", "Invalid class info!");
2211  return;
2212  }
2213 
2214  tcling_callfunc_dtor_Wrapper_t wrapper = 0;
2215  {
2216  R__LOCKGUARD_CLING(gInterpreterMutex);
2217  const Decl *D = info->GetDecl();
2218  map<const Decl *, void *>::iterator I = gDtorWrapperStore.find(D);
2219  if (I != gDtorWrapperStore.end()) {
2220  wrapper = (tcling_callfunc_dtor_Wrapper_t) I->second;
2221  } else {
2222  wrapper = make_dtor_wrapper(info);
2223  }
2224  }
2225  if (!wrapper) {
2226  ::Error("TClingCallFunc::ExecDestructor",
2227  "Called with no wrapper, not implemented!");
2228  return;
2229  }
2230  (*wrapper)(address, nary, withFree);
2231 }
2232 
2233 TClingMethodInfo *
2234 TClingCallFunc::FactoryMethod() const
2235 {
2236  return new TClingMethodInfo(*fMethod);
2237 }
2238 
2239 void TClingCallFunc::Init()
2240 {
2241  fMethod.reset();
2242  fWrapper = 0;
2243  fDecl = nullptr;
2244  fMinRequiredArguments = -1;
2245  ResetArg();
2246 }
2247 
2248 void TClingCallFunc::Init(const TClingMethodInfo &minfo)
2249 {
2250  Init();
2251  fMethod = std::unique_ptr<TClingMethodInfo>(new TClingMethodInfo(minfo));
2252 }
2253 
2254 void TClingCallFunc::Init(std::unique_ptr<TClingMethodInfo> minfo)
2255 {
2256  Init();
2257  fMethod = std::move(minfo);
2258 }
2259 
2260 void *TClingCallFunc::InterfaceMethod()
2261 {
2262  if (!IsValid()) {
2263  return 0;
2264  }
2265  if (!fWrapper) {
2266  const Decl *decl = GetFunctionOrShadowDecl();
2267 
2268  R__LOCKGUARD_CLING(gInterpreterMutex);
2269  map<const Decl *, void *>::iterator I = gWrapperStore.find(decl);
2270  if (I != gWrapperStore.end()) {
2271  fWrapper = (tcling_callfunc_Wrapper_t) I->second;
2272  } else {
2273  fWrapper = make_wrapper();
2274  }
2275  }
2276  return (void *)fWrapper;
2277 }
2278 
2279 bool TClingCallFunc::IsValid() const
2280 {
2281  if (!fMethod) {
2282  return false;
2283  }
2284  return fMethod->IsValid();
2285 }
2286 
2287 TInterpreter::CallFuncIFacePtr_t TClingCallFunc::IFacePtr()
2288 {
2289  if (!IsValid()) {
2290  ::Error("TClingCallFunc::IFacePtr(kind)",
2291  "Attempt to get interface while invalid.");
2292  return TInterpreter::CallFuncIFacePtr_t();
2293  }
2294  if (!fWrapper) {
2295  const Decl *decl = GetFunctionOrShadowDecl();
2296 
2297  R__LOCKGUARD_CLING(gInterpreterMutex);
2298  map<const Decl *, void *>::iterator I = gWrapperStore.find(decl);
2299  if (I != gWrapperStore.end()) {
2300  fWrapper = (tcling_callfunc_Wrapper_t) I->second;
2301  } else {
2302  fWrapper = make_wrapper();
2303  }
2304 
2305  fReturnIsRecordType = GetDecl()->getReturnType().getCanonicalType()->isRecordType();
2306  }
2307  return TInterpreter::CallFuncIFacePtr_t(fWrapper);
2308 }
2309 
2310 
2311 void TClingCallFunc::ResetArg()
2312 {
2313  fArgVals.clear();
2314 }
2315 
2316 void TClingCallFunc::SetArg(unsigned long param)
2317 {
2318  const ASTContext &C = fInterp->getCI()->getASTContext();
2319  fArgVals.push_back(cling::Value(C.UnsignedLongTy, *fInterp));
2320  fArgVals.back().getLL() = param;
2321 }
2322 
2323 void TClingCallFunc::SetArg(long param)
2324 {
2325  const ASTContext &C = fInterp->getCI()->getASTContext();
2326  fArgVals.push_back(cling::Value(C.LongTy, *fInterp));
2327  fArgVals.back().getLL() = param;
2328 }
2329 
2330 void TClingCallFunc::SetArg(float param)
2331 {
2332  const ASTContext &C = fInterp->getCI()->getASTContext();
2333  fArgVals.push_back(cling::Value(C.FloatTy, *fInterp));
2334  fArgVals.back().getFloat() = param;
2335 }
2336 
2337 void TClingCallFunc::SetArg(double param)
2338 {
2339  const ASTContext &C = fInterp->getCI()->getASTContext();
2340  fArgVals.push_back(cling::Value(C.DoubleTy, *fInterp));
2341  fArgVals.back().getDouble() = param;
2342 }
2343 
2344 void TClingCallFunc::SetArg(long long param)
2345 {
2346  const ASTContext &C = fInterp->getCI()->getASTContext();
2347  fArgVals.push_back(cling::Value(C.LongLongTy, *fInterp));
2348  fArgVals.back().getLL() = param;
2349 }
2350 
2351 void TClingCallFunc::SetArg(unsigned long long param)
2352 {
2353  const ASTContext &C = fInterp->getCI()->getASTContext();
2354  fArgVals.push_back(cling::Value(C.UnsignedLongLongTy, *fInterp));
2355  fArgVals.back().getULL() = param;
2356 }
2357 
2358 void TClingCallFunc::SetArgArray(long *paramArr, int nparam)
2359 {
2360  ResetArg();
2361  for (int i = 0; i < nparam; ++i) {
2362  SetArg(paramArr[i]);
2363  }
2364 }
2365 
2366 void TClingCallFunc::SetArgs(const char *params)
2367 {
2368  ResetArg();
2369  EvaluateArgList(params);
2370 }
2371 
2372 void TClingCallFunc::SetFunc(const TClingClassInfo *info, const char *method, const char *arglist,
2373  long *poffset)
2374 {
2375  SetFunc(info, method, arglist, false, poffset);
2376 }
2377 
2378 void TClingCallFunc::SetFunc(const TClingClassInfo *info, const char *method, const char *arglist,
2379  bool objectIsConst, long *poffset)
2380 {
2381  Init(std::unique_ptr<TClingMethodInfo>(new TClingMethodInfo(fInterp)));
2382  if (poffset) {
2383  *poffset = 0L;
2384  }
2385  ResetArg();
2386  if (!info->IsValid()) {
2387  ::Error("TClingCallFunc::SetFunc", "Class info is invalid!");
2388  return;
2389  }
2390  if (!strcmp(arglist, ")")) {
2391  // CINT accepted a single right paren as meaning no arguments.
2392  arglist = "";
2393  }
2394  *fMethod = info->GetMethodWithArgs(method, arglist, objectIsConst, poffset);
2395  if (!fMethod->IsValid()) {
2396  //::Error("TClingCallFunc::SetFunc", "Could not find method %s(%s)", method,
2397  // arglist);
2398  return;
2399  }
2400  // FIXME: The arglist was already parsed by the lookup, we should
2401  // enhance the lookup to return the resulting expression
2402  // list so we do not need to parse it again here.
2403  EvaluateArgList(arglist);
2404 }
2405 
2406 void TClingCallFunc::SetFunc(const TClingMethodInfo *info)
2407 {
2408  Init(std::unique_ptr<TClingMethodInfo>(new TClingMethodInfo(*info)));
2409  ResetArg();
2410  if (!fMethod->IsValid()) {
2411  return;
2412  }
2413 }
2414 
2415 void TClingCallFunc::SetFuncProto(const TClingClassInfo *info, const char *method,
2416  const char *proto, long *poffset,
2417  EFunctionMatchMode mode/*=kConversionMatch*/)
2418 {
2419  SetFuncProto(info, method, proto, false, poffset, mode);
2420 }
2421 
2422 void TClingCallFunc::SetFuncProto(const TClingClassInfo *info, const char *method,
2423  const char *proto, bool objectIsConst, long *poffset,
2424  EFunctionMatchMode mode/*=kConversionMatch*/)
2425 {
2426  Init(std::unique_ptr<TClingMethodInfo>(new TClingMethodInfo(fInterp)));
2427  if (poffset) {
2428  *poffset = 0L;
2429  }
2430  ResetArg();
2431  if (!info->IsValid()) {
2432  ::Error("TClingCallFunc::SetFuncProto", "Class info is invalid!");
2433  return;
2434  }
2435  *fMethod = info->GetMethod(method, proto, objectIsConst, poffset, mode);
2436  if (!fMethod->IsValid()) {
2437  //::Error("TClingCallFunc::SetFuncProto", "Could not find method %s(%s)",
2438  // method, proto);
2439  return;
2440  }
2441 }
2442 
2443 void TClingCallFunc::SetFuncProto(const TClingClassInfo *info, const char *method,
2444  const llvm::SmallVectorImpl<clang::QualType> &proto, long *poffset,
2445  EFunctionMatchMode mode/*=kConversionMatch*/)
2446 {
2447  SetFuncProto(info, method, proto, false, poffset, mode);
2448 }
2449 
2450 void TClingCallFunc::SetFuncProto(const TClingClassInfo *info, const char *method,
2451  const llvm::SmallVectorImpl<clang::QualType> &proto,
2452  bool objectIsConst, long *poffset,
2453  EFunctionMatchMode mode/*=kConversionMatch*/)
2454 {
2455  Init(std::unique_ptr<TClingMethodInfo>(new TClingMethodInfo(fInterp)));
2456  if (poffset) {
2457  *poffset = 0L;
2458  }
2459  ResetArg();
2460  if (!info->IsValid()) {
2461  ::Error("TClingCallFunc::SetFuncProto", "Class info is invalid!");
2462  return;
2463  }
2464  *fMethod = info->GetMethod(method, proto, objectIsConst, poffset, mode);
2465  if (!fMethod->IsValid()) {
2466  //::Error("TClingCallFunc::SetFuncProto", "Could not find method %s(%s)",
2467  // method, proto);
2468  return;
2469  }
2470 }
2471 
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This class defines an interface to the cling C++ interpreter.
Definition: TCling.h:102
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Definition: TInterpreter.h:51
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Return the type name normalized for ROOT, keeping only the ROOT opaque typedef (Double32_t,...
Definition: TClingUtils.cxx:4037
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Definition: TClingClassInfo.cxx:498
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static map< const Decl *, void * > gCtorWrapperStore
Definition: TClingCallFunc.cxx:81
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Definition: TClingCallFunc.cxx:2234
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Emulation of the CINT MethodInfo class.
Definition: TClingMethodInfo.h:124
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Definition: TClingCallFunc.h:83
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Definition: TSQLStructure.cxx:73
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Definition: RtypesCore.h:54
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Emulation of the CINT ClassInfo class.
Definition: TClingClassInfo.h:59
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Definition: TClingClassInfo.cxx:291
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Definition: TClingCallFunc.cxx:2157
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Definition: TClingCallFunc.cxx:2260
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Definition: TClingCallFunc.cxx:2093
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Definition: TClingCallFunc.cxx:2110
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Definition: TClingCallFunc.cxx:345
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virtual bool IsValid() const
Definition: TClingDeclInfo.h:41
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Definition: TClingUtils.h:359
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Definition: TClingCallFunc.cxx:96
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Definition: TSQLStructure.cxx:77
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Definition: TClingCallFunc.cxx:2239
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Definition: civetweb.c:16604
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Definition: Pattern.h:8
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Definition: TClingCallFunc.cxx:2358
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Definition: TSQLStructure.cxx:80
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virtual const void * GetValAddr() const =0
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Definition: Converters.cxx:862
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Definition: BaseSelectionRule.h:29
gCling
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Definition: TInterpreter.h:561
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Definition: TClassEdit.cxx:154
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Definition: TGX11.cxx:110
ROOT::TMetaUtils::EIOCtorCategory::kIOPtrType
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double T(double x)
Definition: ChebyshevPol.h:34
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Definition: TClingCallFunc.cxx:588
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Definition: TClingCallFunc.cxx:2035
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Definition: TClingCallFunc.cxx:1532
I
#define I(x, y, z)
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Definition: TClingCallFunc.cxx:2145
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Definition: TClingCallFunc.cxx:80
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virtual const clang::Decl * GetDecl() const
Definition: TClingDeclInfo.h:37
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Definition: TGeant4SystemOfUnits.h:105
TClingCallFunc::collect_type_info
void collect_type_info(clang::QualType &QT, std::ostringstream &typedefbuf, std::ostringstream &callbuf, std::string &type_name, EReferenceType &refType, bool &isPointer, int indent_level, bool forArgument)
Definition: TClingCallFunc.cxx:272
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Definition: TClingCallFunc.cxx:2135
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Definition: TClingCallFunc.cxx:2130
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tbb::task_arena is an alias of tbb::interface7::task_arena, which doesn't allow to forward declare tb...
Definition: EExecutionPolicy.hxx:4
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constexpr Double_t E()
Base of natural log:
Definition: TMath.h:96
int
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Definition: TClingCallFunc.cxx:2287
Error
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Use this function in case an error occurred.
Definition: TError.cxx:187
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TClingCallFunc::ResetArg
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Definition: TClingCallFunc.cxx:2311