Stephen Hines | 4b32ffd | 2010-11-05 18:47:11 -0700 | [diff] [blame] | 1 | /* |
| 2 | * Copyright 2010, The Android Open Source Project |
| 3 | * |
| 4 | * Licensed under the Apache License, Version 2.0 (the "License"); |
| 5 | * you may not use this file except in compliance with the License. |
| 6 | * You may obtain a copy of the License at |
| 7 | * |
| 8 | * http://www.apache.org/licenses/LICENSE-2.0 |
| 9 | * |
| 10 | * Unless required by applicable law or agreed to in writing, software |
| 11 | * distributed under the License is distributed on an "AS IS" BASIS, |
| 12 | * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
| 13 | * See the License for the specific language governing permissions and |
| 14 | * limitations under the License. |
| 15 | */ |
| 16 | |
| 17 | #include "slang_rs_object_ref_count.h" |
| 18 | |
Stephen Hines | e639eb5 | 2010-11-08 19:27:20 -0800 | [diff] [blame] | 19 | #include <list> |
| 20 | |
Stephen Hines | 4b32ffd | 2010-11-05 18:47:11 -0700 | [diff] [blame] | 21 | #include "clang/AST/DeclGroup.h" |
| 22 | #include "clang/AST/Expr.h" |
| 23 | #include "clang/AST/OperationKinds.h" |
| 24 | #include "clang/AST/Stmt.h" |
| 25 | #include "clang/AST/StmtVisitor.h" |
| 26 | |
| 27 | #include "slang_rs.h" |
| 28 | #include "slang_rs_export_type.h" |
| 29 | |
Stephen Hines | e639eb5 | 2010-11-08 19:27:20 -0800 | [diff] [blame] | 30 | namespace slang { |
Stephen Hines | 4b32ffd | 2010-11-05 18:47:11 -0700 | [diff] [blame] | 31 | |
Stephen Hines | 1bdd497 | 2010-11-08 17:35:08 -0800 | [diff] [blame] | 32 | clang::FunctionDecl *RSObjectRefCount::Scope:: |
| 33 | RSSetObjectFD[RSExportPrimitiveType::LastRSObjectType - |
| 34 | RSExportPrimitiveType::FirstRSObjectType + 1]; |
| 35 | clang::FunctionDecl *RSObjectRefCount::Scope:: |
| 36 | RSClearObjectFD[RSExportPrimitiveType::LastRSObjectType - |
| 37 | RSExportPrimitiveType::FirstRSObjectType + 1]; |
| 38 | |
| 39 | void RSObjectRefCount::Scope::GetRSRefCountingFunctions( |
| 40 | clang::ASTContext &C) { |
| 41 | for (unsigned i = 0; |
| 42 | i < (sizeof(RSClearObjectFD) / sizeof(clang::FunctionDecl*)); |
| 43 | i++) { |
| 44 | RSSetObjectFD[i] = NULL; |
| 45 | RSClearObjectFD[i] = NULL; |
| 46 | } |
| 47 | |
| 48 | clang::TranslationUnitDecl *TUDecl = C.getTranslationUnitDecl(); |
| 49 | |
| 50 | for (clang::DeclContext::decl_iterator I = TUDecl->decls_begin(), |
| 51 | E = TUDecl->decls_end(); I != E; I++) { |
| 52 | if ((I->getKind() >= clang::Decl::firstFunction) && |
| 53 | (I->getKind() <= clang::Decl::lastFunction)) { |
| 54 | clang::FunctionDecl *FD = static_cast<clang::FunctionDecl*>(*I); |
| 55 | |
| 56 | // points to RSSetObjectFD or RSClearObjectFD |
| 57 | clang::FunctionDecl **RSObjectFD; |
| 58 | |
| 59 | if (FD->getName() == "rsSetObject") { |
| 60 | assert((FD->getNumParams() == 2) && |
| 61 | "Invalid rsSetObject function prototype (# params)"); |
| 62 | RSObjectFD = RSSetObjectFD; |
| 63 | } else if (FD->getName() == "rsClearObject") { |
| 64 | assert((FD->getNumParams() == 1) && |
| 65 | "Invalid rsClearObject function prototype (# params)"); |
| 66 | RSObjectFD = RSClearObjectFD; |
Stephen Hines | e639eb5 | 2010-11-08 19:27:20 -0800 | [diff] [blame] | 67 | } else { |
Stephen Hines | 1bdd497 | 2010-11-08 17:35:08 -0800 | [diff] [blame] | 68 | continue; |
| 69 | } |
| 70 | |
| 71 | const clang::ParmVarDecl *PVD = FD->getParamDecl(0); |
| 72 | clang::QualType PVT = PVD->getOriginalType(); |
| 73 | // The first parameter must be a pointer like rs_allocation* |
| 74 | assert(PVT->isPointerType() && |
| 75 | "Invalid rs{Set,Clear}Object function prototype (pointer param)"); |
| 76 | |
| 77 | // The rs object type passed to the FD |
| 78 | clang::QualType RST = PVT->getPointeeType(); |
| 79 | RSExportPrimitiveType::DataType DT = |
| 80 | RSExportPrimitiveType::GetRSSpecificType(RST.getTypePtr()); |
| 81 | assert(RSExportPrimitiveType::IsRSObjectType(DT) |
| 82 | && "must be RS object type"); |
| 83 | |
| 84 | RSObjectFD[(DT - RSExportPrimitiveType::FirstRSObjectType)] = FD; |
| 85 | } |
| 86 | } |
| 87 | } |
| 88 | |
Stephen Hines | 4464d82 | 2010-11-11 16:45:08 -0800 | [diff] [blame] | 89 | namespace { |
| 90 | |
| 91 | static void AppendToCompoundStatement(clang::ASTContext& C, |
| 92 | clang::CompoundStmt *CS, |
Stephen Hines | d5f9d6c | 2010-12-15 16:11:29 -0800 | [diff] [blame] | 93 | std::list<clang::Stmt*> &StmtList, |
Stephen Hines | 4464d82 | 2010-11-11 16:45:08 -0800 | [diff] [blame] | 94 | bool InsertAtEndOfBlock) { |
Stephen Hines | 1bdd497 | 2010-11-08 17:35:08 -0800 | [diff] [blame] | 95 | // Destructor code will be inserted before any return statement. |
| 96 | // Any subsequent statements in the compound statement are then placed |
| 97 | // after our new code. |
Stephen Hines | e639eb5 | 2010-11-08 19:27:20 -0800 | [diff] [blame] | 98 | // TODO(srhines): This should also handle the case of goto/break/continue. |
Stephen Hines | 4464d82 | 2010-11-11 16:45:08 -0800 | [diff] [blame] | 99 | |
| 100 | clang::CompoundStmt::body_iterator bI = CS->body_begin(); |
Stephen Hines | 1bdd497 | 2010-11-08 17:35:08 -0800 | [diff] [blame] | 101 | |
| 102 | unsigned OldStmtCount = 0; |
Stephen Hines | 03981a3 | 2010-12-14 19:45:49 -0800 | [diff] [blame] | 103 | for (bI = CS->body_begin(); bI != CS->body_end(); bI++) { |
Stephen Hines | 1bdd497 | 2010-11-08 17:35:08 -0800 | [diff] [blame] | 104 | OldStmtCount++; |
| 105 | } |
| 106 | |
Stephen Hines | d5f9d6c | 2010-12-15 16:11:29 -0800 | [diff] [blame] | 107 | unsigned NewStmtCount = StmtList.size(); |
Stephen Hines | 1bdd497 | 2010-11-08 17:35:08 -0800 | [diff] [blame] | 108 | |
Stephen Hines | d5f9d6c | 2010-12-15 16:11:29 -0800 | [diff] [blame] | 109 | clang::Stmt **UpdatedStmtList; |
| 110 | UpdatedStmtList = new clang::Stmt*[OldStmtCount+NewStmtCount]; |
Stephen Hines | 1bdd497 | 2010-11-08 17:35:08 -0800 | [diff] [blame] | 111 | |
| 112 | unsigned UpdatedStmtCount = 0; |
Stephen Hines | 4464d82 | 2010-11-11 16:45:08 -0800 | [diff] [blame] | 113 | bool FoundReturn = false; |
Stephen Hines | 03981a3 | 2010-12-14 19:45:49 -0800 | [diff] [blame] | 114 | for (bI = CS->body_begin(); bI != CS->body_end(); bI++) { |
Stephen Hines | 1bdd497 | 2010-11-08 17:35:08 -0800 | [diff] [blame] | 115 | if ((*bI)->getStmtClass() == clang::Stmt::ReturnStmtClass) { |
Stephen Hines | 4464d82 | 2010-11-11 16:45:08 -0800 | [diff] [blame] | 116 | FoundReturn = true; |
Stephen Hines | 1bdd497 | 2010-11-08 17:35:08 -0800 | [diff] [blame] | 117 | break; |
| 118 | } |
Stephen Hines | d5f9d6c | 2010-12-15 16:11:29 -0800 | [diff] [blame] | 119 | UpdatedStmtList[UpdatedStmtCount++] = *bI; |
Stephen Hines | 1bdd497 | 2010-11-08 17:35:08 -0800 | [diff] [blame] | 120 | } |
| 121 | |
Stephen Hines | 4464d82 | 2010-11-11 16:45:08 -0800 | [diff] [blame] | 122 | // Always insert before a return that we found, or if we are told |
| 123 | // to insert at the end of the block |
| 124 | if (FoundReturn || InsertAtEndOfBlock) { |
Stephen Hines | 03981a3 | 2010-12-14 19:45:49 -0800 | [diff] [blame] | 125 | std::list<clang::Stmt*>::const_iterator I = StmtList.begin(); |
| 126 | for (std::list<clang::Stmt*>::const_iterator I = StmtList.begin(); |
| 127 | I != StmtList.end(); |
Stephen Hines | 4464d82 | 2010-11-11 16:45:08 -0800 | [diff] [blame] | 128 | I++) { |
Stephen Hines | d5f9d6c | 2010-12-15 16:11:29 -0800 | [diff] [blame] | 129 | UpdatedStmtList[UpdatedStmtCount++] = *I; |
Stephen Hines | 4464d82 | 2010-11-11 16:45:08 -0800 | [diff] [blame] | 130 | } |
Stephen Hines | 1bdd497 | 2010-11-08 17:35:08 -0800 | [diff] [blame] | 131 | } |
| 132 | |
| 133 | // Pick up anything left over after a return statement |
Stephen Hines | 03981a3 | 2010-12-14 19:45:49 -0800 | [diff] [blame] | 134 | for ( ; bI != CS->body_end(); bI++) { |
Stephen Hines | d5f9d6c | 2010-12-15 16:11:29 -0800 | [diff] [blame] | 135 | UpdatedStmtList[UpdatedStmtCount++] = *bI; |
Stephen Hines | 1bdd497 | 2010-11-08 17:35:08 -0800 | [diff] [blame] | 136 | } |
| 137 | |
Stephen Hines | d5f9d6c | 2010-12-15 16:11:29 -0800 | [diff] [blame] | 138 | CS->setStmts(C, UpdatedStmtList, UpdatedStmtCount); |
Stephen Hines | 1bdd497 | 2010-11-08 17:35:08 -0800 | [diff] [blame] | 139 | |
Stephen Hines | d5f9d6c | 2010-12-15 16:11:29 -0800 | [diff] [blame] | 140 | delete [] UpdatedStmtList; |
Stephen Hines | 1bdd497 | 2010-11-08 17:35:08 -0800 | [diff] [blame] | 141 | |
| 142 | return; |
| 143 | } |
| 144 | |
Stephen Hines | d5f9d6c | 2010-12-15 16:11:29 -0800 | [diff] [blame] | 145 | // This class visits a compound statement and inserts the StmtList containing |
Stephen Hines | 4464d82 | 2010-11-11 16:45:08 -0800 | [diff] [blame] | 146 | // destructors in proper locations. This includes inserting them before any |
| 147 | // return statement in any sub-block, at the end of the logical enclosing |
| 148 | // scope (compound statement), and/or before any break/continue statement that |
| 149 | // would resume outside the declared scope. We will not handle the case for |
| 150 | // goto statements that leave a local scope. |
| 151 | // TODO(srhines): Make this work properly for break/continue. |
| 152 | class DestructorVisitor : public clang::StmtVisitor<DestructorVisitor> { |
| 153 | private: |
| 154 | clang::ASTContext &mC; |
Stephen Hines | d5f9d6c | 2010-12-15 16:11:29 -0800 | [diff] [blame] | 155 | std::list<clang::Stmt*> &mStmtList; |
Stephen Hines | 4464d82 | 2010-11-11 16:45:08 -0800 | [diff] [blame] | 156 | bool mTopLevel; |
| 157 | public: |
Stephen Hines | d5f9d6c | 2010-12-15 16:11:29 -0800 | [diff] [blame] | 158 | DestructorVisitor(clang::ASTContext &C, std::list<clang::Stmt*> &StmtList); |
Stephen Hines | 4464d82 | 2010-11-11 16:45:08 -0800 | [diff] [blame] | 159 | void VisitStmt(clang::Stmt *S); |
| 160 | void VisitCompoundStmt(clang::CompoundStmt *CS); |
| 161 | }; |
| 162 | |
| 163 | DestructorVisitor::DestructorVisitor(clang::ASTContext &C, |
Stephen Hines | d5f9d6c | 2010-12-15 16:11:29 -0800 | [diff] [blame] | 164 | std::list<clang::Stmt*> &StmtList) |
Stephen Hines | 4464d82 | 2010-11-11 16:45:08 -0800 | [diff] [blame] | 165 | : mC(C), |
Stephen Hines | d5f9d6c | 2010-12-15 16:11:29 -0800 | [diff] [blame] | 166 | mStmtList(StmtList), |
Stephen Hines | 4464d82 | 2010-11-11 16:45:08 -0800 | [diff] [blame] | 167 | mTopLevel(true) { |
| 168 | return; |
| 169 | } |
| 170 | |
| 171 | void DestructorVisitor::VisitCompoundStmt(clang::CompoundStmt *CS) { |
| 172 | if (!CS->body_empty()) { |
Stephen Hines | d5f9d6c | 2010-12-15 16:11:29 -0800 | [diff] [blame] | 173 | AppendToCompoundStatement(mC, CS, mStmtList, mTopLevel); |
Stephen Hines | 4464d82 | 2010-11-11 16:45:08 -0800 | [diff] [blame] | 174 | mTopLevel = false; |
| 175 | VisitStmt(CS); |
| 176 | } |
| 177 | return; |
| 178 | } |
| 179 | |
| 180 | void DestructorVisitor::VisitStmt(clang::Stmt *S) { |
| 181 | for (clang::Stmt::child_iterator I = S->child_begin(), E = S->child_end(); |
| 182 | I != E; |
| 183 | I++) { |
| 184 | if (clang::Stmt *Child = *I) { |
| 185 | Visit(Child); |
| 186 | } |
| 187 | } |
| 188 | return; |
| 189 | } |
| 190 | |
Stephen Hines | 03981a3 | 2010-12-14 19:45:49 -0800 | [diff] [blame] | 191 | static int ArrayDim(clang::VarDecl *VD) { |
| 192 | const clang::Type *T = RSExportType::GetTypeOfDecl(VD); |
| 193 | |
| 194 | if (!T || !T->isArrayType()) { |
| 195 | return 0; |
| 196 | } |
| 197 | |
| 198 | const clang::ConstantArrayType *CAT = |
| 199 | static_cast<const clang::ConstantArrayType *>(T); |
Stephen Hines | 9d2c0fa | 2011-01-05 14:55:18 -0800 | [diff] [blame^] | 200 | return static_cast<int>(CAT->getSize().getSExtValue()); |
Stephen Hines | 03981a3 | 2010-12-14 19:45:49 -0800 | [diff] [blame] | 201 | } |
| 202 | |
| 203 | static clang::Stmt *ClearArrayRSObject(clang::VarDecl *VD, |
| 204 | const clang::Type *T, |
| 205 | clang::FunctionDecl *ClearObjectFD) { |
| 206 | clang::ASTContext &C = VD->getASTContext(); |
| 207 | clang::SourceRange Range = VD->getQualifierRange(); |
| 208 | clang::SourceLocation Loc = Range.getEnd(); |
| 209 | |
| 210 | clang::Stmt *StmtArray[2] = {NULL}; |
| 211 | int StmtCtr = 0; |
| 212 | |
| 213 | int NumArrayElements = ArrayDim(VD); |
| 214 | if (NumArrayElements <= 0) { |
| 215 | return NULL; |
| 216 | } |
| 217 | |
| 218 | // Example destructor loop for "rs_font fontArr[10];" |
| 219 | // |
| 220 | // (CompoundStmt |
| 221 | // (DeclStmt "int rsIntIter") |
| 222 | // (ForStmt |
| 223 | // (BinaryOperator 'int' '=' |
| 224 | // (DeclRefExpr 'int' Var='rsIntIter') |
| 225 | // (IntegerLiteral 'int' 0)) |
| 226 | // (BinaryOperator 'int' '<' |
| 227 | // (DeclRefExpr 'int' Var='rsIntIter') |
| 228 | // (IntegerLiteral 'int' 10) |
| 229 | // NULL << CondVar >> |
| 230 | // (UnaryOperator 'int' postfix '++' |
| 231 | // (DeclRefExpr 'int' Var='rsIntIter')) |
| 232 | // (CallExpr 'void' |
| 233 | // (ImplicitCastExpr 'void (*)(rs_font *)' <FunctionToPointerDecay> |
| 234 | // (DeclRefExpr 'void (rs_font *)' FunctionDecl='rsClearObject')) |
| 235 | // (UnaryOperator 'rs_font *' prefix '&' |
| 236 | // (ArraySubscriptExpr 'rs_font':'rs_font' |
| 237 | // (ImplicitCastExpr 'rs_font *' <ArrayToPointerDecay> |
| 238 | // (DeclRefExpr 'rs_font [10]' Var='fontArr')) |
| 239 | // (DeclRefExpr 'int' Var='rsIntIter'))))))) |
| 240 | |
| 241 | // Create helper variable for iterating through elements |
| 242 | clang::IdentifierInfo& II = C.Idents.get("rsIntIter"); |
| 243 | clang::VarDecl *IIVD = |
| 244 | clang::VarDecl::Create(C, |
| 245 | VD->getDeclContext(), |
| 246 | Loc, |
| 247 | &II, |
| 248 | C.IntTy, |
| 249 | C.getTrivialTypeSourceInfo(C.IntTy), |
| 250 | clang::SC_None, |
| 251 | clang::SC_None); |
| 252 | clang::Decl *IID = (clang::Decl *)IIVD; |
| 253 | |
| 254 | clang::DeclGroupRef DGR = clang::DeclGroupRef::Create(C, &IID, 1); |
| 255 | StmtArray[StmtCtr++] = new(C) clang::DeclStmt(DGR, Loc, Loc); |
| 256 | |
| 257 | // Form the actual destructor loop |
| 258 | // for (Init; Cond; Inc) |
| 259 | // RSClearObjectCall; |
| 260 | |
| 261 | // Init -> "rsIntIter = 0" |
| 262 | clang::DeclRefExpr *RefrsIntIter = |
| 263 | clang::DeclRefExpr::Create(C, |
| 264 | NULL, |
| 265 | Range, |
| 266 | IIVD, |
| 267 | Loc, |
| 268 | C.IntTy); |
| 269 | |
| 270 | clang::Expr *Int0 = clang::IntegerLiteral::Create(C, |
| 271 | llvm::APInt(C.getTypeSize(C.IntTy), 0), C.IntTy, Loc); |
| 272 | |
| 273 | clang::BinaryOperator *Init = |
| 274 | new(C) clang::BinaryOperator(RefrsIntIter, |
| 275 | Int0, |
| 276 | clang::BO_Assign, |
| 277 | C.IntTy, |
| 278 | Loc); |
| 279 | |
| 280 | // Cond -> "rsIntIter < NumArrayElements" |
| 281 | clang::Expr *NumArrayElementsExpr = clang::IntegerLiteral::Create(C, |
| 282 | llvm::APInt(C.getTypeSize(C.IntTy), NumArrayElements), C.IntTy, Loc); |
| 283 | |
| 284 | clang::BinaryOperator *Cond = |
| 285 | new(C) clang::BinaryOperator(RefrsIntIter, |
| 286 | NumArrayElementsExpr, |
| 287 | clang::BO_LT, |
| 288 | C.IntTy, |
| 289 | Loc); |
| 290 | |
| 291 | // Inc -> "rsIntIter++" |
| 292 | clang::UnaryOperator *Inc = |
| 293 | new(C) clang::UnaryOperator(RefrsIntIter, |
| 294 | clang::UO_PostInc, |
| 295 | C.IntTy, |
| 296 | Loc); |
| 297 | |
| 298 | // Body -> "rsClearObject(&VD[rsIntIter]);" |
| 299 | // Destructor loop operates on individual array elements |
| 300 | clang::QualType ClearObjectFDType = ClearObjectFD->getType(); |
| 301 | clang::QualType ClearObjectFDArgType = |
| 302 | ClearObjectFD->getParamDecl(0)->getOriginalType(); |
| 303 | |
| 304 | const clang::Type *VT = RSExportType::GetTypeOfDecl(VD); |
| 305 | clang::DeclRefExpr *RefRSVar = |
| 306 | clang::DeclRefExpr::Create(C, |
| 307 | NULL, |
| 308 | Range, |
| 309 | VD, |
| 310 | Loc, |
| 311 | VT->getCanonicalTypeInternal()); |
| 312 | |
| 313 | clang::Expr *RefRSVarPtr = |
| 314 | clang::ImplicitCastExpr::Create(C, |
| 315 | C.getPointerType(T->getCanonicalTypeInternal()), |
| 316 | clang::CK_ArrayToPointerDecay, |
| 317 | RefRSVar, |
| 318 | NULL, |
| 319 | clang::VK_RValue); |
| 320 | |
| 321 | clang::Expr *RefRSVarPtrSubscript = |
| 322 | new(C) clang::ArraySubscriptExpr(RefRSVarPtr, |
| 323 | RefrsIntIter, |
| 324 | T->getCanonicalTypeInternal(), |
| 325 | VD->getLocation()); |
| 326 | |
| 327 | clang::Expr *AddrRefRSVarPtrSubscript = |
| 328 | new(C) clang::UnaryOperator(RefRSVarPtrSubscript, |
| 329 | clang::UO_AddrOf, |
| 330 | ClearObjectFDArgType, |
| 331 | VD->getLocation()); |
| 332 | |
| 333 | clang::Expr *RefRSClearObjectFD = |
| 334 | clang::DeclRefExpr::Create(C, |
| 335 | NULL, |
| 336 | Range, |
| 337 | ClearObjectFD, |
| 338 | Loc, |
| 339 | ClearObjectFDType); |
| 340 | |
| 341 | clang::Expr *RSClearObjectFP = |
| 342 | clang::ImplicitCastExpr::Create(C, |
| 343 | C.getPointerType(ClearObjectFDType), |
| 344 | clang::CK_FunctionToPointerDecay, |
| 345 | RefRSClearObjectFD, |
| 346 | NULL, |
| 347 | clang::VK_RValue); |
| 348 | |
| 349 | clang::CallExpr *RSClearObjectCall = |
| 350 | new(C) clang::CallExpr(C, |
| 351 | RSClearObjectFP, |
| 352 | &AddrRefRSVarPtrSubscript, |
| 353 | 1, |
| 354 | ClearObjectFD->getCallResultType(), |
| 355 | Loc); |
| 356 | |
| 357 | clang::ForStmt *DestructorLoop = |
| 358 | new(C) clang::ForStmt(C, |
| 359 | Init, |
| 360 | Cond, |
| 361 | NULL, // no condVar |
| 362 | Inc, |
| 363 | RSClearObjectCall, |
| 364 | Loc, |
| 365 | Loc, |
| 366 | Loc); |
| 367 | |
| 368 | StmtArray[StmtCtr++] = DestructorLoop; |
| 369 | assert(StmtCtr == 2); |
| 370 | |
| 371 | clang::CompoundStmt *CS = |
| 372 | new(C) clang::CompoundStmt(C, StmtArray, StmtCtr, Loc, Loc); |
| 373 | |
| 374 | return CS; |
| 375 | } |
| 376 | |
Stephen Hines | 4464d82 | 2010-11-11 16:45:08 -0800 | [diff] [blame] | 377 | } // namespace |
| 378 | |
Stephen Hines | 1bdd497 | 2010-11-08 17:35:08 -0800 | [diff] [blame] | 379 | void RSObjectRefCount::Scope::InsertLocalVarDestructors() { |
Stephen Hines | d5f9d6c | 2010-12-15 16:11:29 -0800 | [diff] [blame] | 380 | std::list<clang::Stmt*> RSClearObjectCalls; |
Stephen Hines | 1bdd497 | 2010-11-08 17:35:08 -0800 | [diff] [blame] | 381 | for (std::list<clang::VarDecl*>::const_iterator I = mRSO.begin(), |
| 382 | E = mRSO.end(); |
| 383 | I != E; |
| 384 | I++) { |
Stephen Hines | d5f9d6c | 2010-12-15 16:11:29 -0800 | [diff] [blame] | 385 | clang::Stmt *E = ClearRSObject(*I); |
Stephen Hines | 1bdd497 | 2010-11-08 17:35:08 -0800 | [diff] [blame] | 386 | if (E) { |
| 387 | RSClearObjectCalls.push_back(E); |
| 388 | } |
| 389 | } |
| 390 | if (RSClearObjectCalls.size() > 0) { |
Stephen Hines | 4464d82 | 2010-11-11 16:45:08 -0800 | [diff] [blame] | 391 | DestructorVisitor DV((*mRSO.begin())->getASTContext(), RSClearObjectCalls); |
| 392 | DV.Visit(mCS); |
Stephen Hines | 1bdd497 | 2010-11-08 17:35:08 -0800 | [diff] [blame] | 393 | } |
| 394 | return; |
| 395 | } |
| 396 | |
Stephen Hines | d5f9d6c | 2010-12-15 16:11:29 -0800 | [diff] [blame] | 397 | clang::Stmt *RSObjectRefCount::Scope::ClearRSObject(clang::VarDecl *VD) { |
Stephen Hines | 03981a3 | 2010-12-14 19:45:49 -0800 | [diff] [blame] | 398 | bool IsArrayType = false; |
Stephen Hines | 1bdd497 | 2010-11-08 17:35:08 -0800 | [diff] [blame] | 399 | clang::ASTContext &C = VD->getASTContext(); |
| 400 | clang::SourceLocation Loc = VD->getLocation(); |
| 401 | const clang::Type *T = RSExportType::GetTypeOfDecl(VD); |
Stephen Hines | 03981a3 | 2010-12-14 19:45:49 -0800 | [diff] [blame] | 402 | |
| 403 | // Loop through array types to get to base type |
| 404 | while (T && T->isArrayType()) { |
| 405 | T = T->getArrayElementTypeNoTypeQual(); |
| 406 | IsArrayType = true; |
| 407 | } |
| 408 | |
Stephen Hines | 1bdd497 | 2010-11-08 17:35:08 -0800 | [diff] [blame] | 409 | RSExportPrimitiveType::DataType DT = |
| 410 | RSExportPrimitiveType::GetRSSpecificType(T); |
| 411 | |
| 412 | assert((RSExportPrimitiveType::IsRSObjectType(DT)) && |
| 413 | "Should be RS object"); |
| 414 | |
| 415 | // Find the rsClearObject() for VD of RS object type DT |
| 416 | clang::FunctionDecl *ClearObjectFD = |
| 417 | RSClearObjectFD[(DT - RSExportPrimitiveType::FirstRSObjectType)]; |
| 418 | assert((ClearObjectFD != NULL) && |
| 419 | "rsClearObject doesn't cover all RS object types"); |
| 420 | |
Stephen Hines | 03981a3 | 2010-12-14 19:45:49 -0800 | [diff] [blame] | 421 | if (IsArrayType) { |
| 422 | return ClearArrayRSObject(VD, T, ClearObjectFD); |
| 423 | } |
| 424 | |
Stephen Hines | 1bdd497 | 2010-11-08 17:35:08 -0800 | [diff] [blame] | 425 | clang::QualType ClearObjectFDType = ClearObjectFD->getType(); |
| 426 | clang::QualType ClearObjectFDArgType = |
| 427 | ClearObjectFD->getParamDecl(0)->getOriginalType(); |
| 428 | |
Stephen Hines | 03981a3 | 2010-12-14 19:45:49 -0800 | [diff] [blame] | 429 | // Example destructor for "rs_font localFont;" |
| 430 | // |
Stephen Hines | 1bdd497 | 2010-11-08 17:35:08 -0800 | [diff] [blame] | 431 | // (CallExpr 'void' |
| 432 | // (ImplicitCastExpr 'void (*)(rs_font *)' <FunctionToPointerDecay> |
| 433 | // (DeclRefExpr 'void (rs_font *)' FunctionDecl='rsClearObject')) |
| 434 | // (UnaryOperator 'rs_font *' prefix '&' |
Stephen Hines | 03981a3 | 2010-12-14 19:45:49 -0800 | [diff] [blame] | 435 | // (DeclRefExpr 'rs_font':'rs_font' Var='localFont'))) |
Stephen Hines | 1bdd497 | 2010-11-08 17:35:08 -0800 | [diff] [blame] | 436 | |
| 437 | // Reference expr to target RS object variable |
| 438 | clang::DeclRefExpr *RefRSVar = |
| 439 | clang::DeclRefExpr::Create(C, |
| 440 | NULL, |
| 441 | VD->getQualifierRange(), |
| 442 | VD, |
| 443 | Loc, |
Stephen Hines | 03981a3 | 2010-12-14 19:45:49 -0800 | [diff] [blame] | 444 | T->getCanonicalTypeInternal()); |
Stephen Hines | 1bdd497 | 2010-11-08 17:35:08 -0800 | [diff] [blame] | 445 | |
| 446 | // Get address of RSObject in VD |
| 447 | clang::Expr *AddrRefRSVar = |
Stephen Hines | e639eb5 | 2010-11-08 19:27:20 -0800 | [diff] [blame] | 448 | new(C) clang::UnaryOperator(RefRSVar, |
| 449 | clang::UO_AddrOf, |
| 450 | ClearObjectFDArgType, |
| 451 | Loc); |
Stephen Hines | 1bdd497 | 2010-11-08 17:35:08 -0800 | [diff] [blame] | 452 | |
| 453 | clang::Expr *RefRSClearObjectFD = |
| 454 | clang::DeclRefExpr::Create(C, |
| 455 | NULL, |
| 456 | ClearObjectFD->getQualifierRange(), |
| 457 | ClearObjectFD, |
| 458 | ClearObjectFD->getLocation(), |
Stephen Hines | 03981a3 | 2010-12-14 19:45:49 -0800 | [diff] [blame] | 459 | ClearObjectFDType); |
Stephen Hines | 1bdd497 | 2010-11-08 17:35:08 -0800 | [diff] [blame] | 460 | |
| 461 | clang::Expr *RSClearObjectFP = |
| 462 | clang::ImplicitCastExpr::Create(C, |
| 463 | C.getPointerType(ClearObjectFDType), |
| 464 | clang::CK_FunctionToPointerDecay, |
| 465 | RefRSClearObjectFD, |
| 466 | NULL, |
| 467 | clang::VK_RValue); |
| 468 | |
| 469 | clang::CallExpr *RSClearObjectCall = |
Stephen Hines | e639eb5 | 2010-11-08 19:27:20 -0800 | [diff] [blame] | 470 | new(C) clang::CallExpr(C, |
| 471 | RSClearObjectFP, |
| 472 | &AddrRefRSVar, |
| 473 | 1, |
| 474 | ClearObjectFD->getCallResultType(), |
| 475 | clang::SourceLocation()); |
Stephen Hines | 1bdd497 | 2010-11-08 17:35:08 -0800 | [diff] [blame] | 476 | |
| 477 | return RSClearObjectCall; |
| 478 | } |
| 479 | |
Stephen Hines | 4b32ffd | 2010-11-05 18:47:11 -0700 | [diff] [blame] | 480 | bool RSObjectRefCount::InitializeRSObject(clang::VarDecl *VD) { |
Stephen Hines | 2d09504 | 2010-11-12 18:13:56 -0800 | [diff] [blame] | 481 | bool IsArrayType = false; |
Stephen Hines | 4b32ffd | 2010-11-05 18:47:11 -0700 | [diff] [blame] | 482 | const clang::Type *T = RSExportType::GetTypeOfDecl(VD); |
Stephen Hines | 2d09504 | 2010-11-12 18:13:56 -0800 | [diff] [blame] | 483 | |
| 484 | // Loop through array types to get to base type |
| 485 | while (T && T->isArrayType()) { |
| 486 | T = T->getArrayElementTypeNoTypeQual(); |
| 487 | IsArrayType = true; |
| 488 | } |
| 489 | |
Stephen Hines | 4b32ffd | 2010-11-05 18:47:11 -0700 | [diff] [blame] | 490 | RSExportPrimitiveType::DataType DT = |
| 491 | RSExportPrimitiveType::GetRSSpecificType(T); |
| 492 | |
Stephen Hines | 2d09504 | 2010-11-12 18:13:56 -0800 | [diff] [blame] | 493 | if (DT == RSExportPrimitiveType::DataTypeUnknown) { |
Stephen Hines | 4b32ffd | 2010-11-05 18:47:11 -0700 | [diff] [blame] | 494 | return false; |
Stephen Hines | 2d09504 | 2010-11-12 18:13:56 -0800 | [diff] [blame] | 495 | } |
Stephen Hines | 4b32ffd | 2010-11-05 18:47:11 -0700 | [diff] [blame] | 496 | |
| 497 | if (VD->hasInit()) { |
Stephen Hines | e639eb5 | 2010-11-08 19:27:20 -0800 | [diff] [blame] | 498 | // TODO(srhines): Update the reference count of RS object in initializer. |
Stephen Hines | 4b32ffd | 2010-11-05 18:47:11 -0700 | [diff] [blame] | 499 | // This can potentially be done as part of the assignment pass. |
| 500 | } else { |
| 501 | clang::Expr *ZeroInitializer = |
| 502 | CreateZeroInitializerForRSSpecificType(DT, |
| 503 | VD->getASTContext(), |
| 504 | VD->getLocation()); |
| 505 | |
| 506 | if (ZeroInitializer) { |
| 507 | ZeroInitializer->setType(T->getCanonicalTypeInternal()); |
| 508 | VD->setInit(ZeroInitializer); |
| 509 | } |
| 510 | } |
| 511 | |
Stephen Hines | 03981a3 | 2010-12-14 19:45:49 -0800 | [diff] [blame] | 512 | return RSExportPrimitiveType::IsRSObjectType(DT); |
Stephen Hines | 4b32ffd | 2010-11-05 18:47:11 -0700 | [diff] [blame] | 513 | } |
| 514 | |
| 515 | clang::Expr *RSObjectRefCount::CreateZeroInitializerForRSSpecificType( |
| 516 | RSExportPrimitiveType::DataType DT, |
| 517 | clang::ASTContext &C, |
| 518 | const clang::SourceLocation &Loc) { |
| 519 | clang::Expr *Res = NULL; |
| 520 | switch (DT) { |
| 521 | case RSExportPrimitiveType::DataTypeRSElement: |
| 522 | case RSExportPrimitiveType::DataTypeRSType: |
| 523 | case RSExportPrimitiveType::DataTypeRSAllocation: |
| 524 | case RSExportPrimitiveType::DataTypeRSSampler: |
| 525 | case RSExportPrimitiveType::DataTypeRSScript: |
| 526 | case RSExportPrimitiveType::DataTypeRSMesh: |
| 527 | case RSExportPrimitiveType::DataTypeRSProgramFragment: |
| 528 | case RSExportPrimitiveType::DataTypeRSProgramVertex: |
| 529 | case RSExportPrimitiveType::DataTypeRSProgramRaster: |
| 530 | case RSExportPrimitiveType::DataTypeRSProgramStore: |
| 531 | case RSExportPrimitiveType::DataTypeRSFont: { |
| 532 | // (ImplicitCastExpr 'nullptr_t' |
| 533 | // (IntegerLiteral 0))) |
| 534 | llvm::APInt Zero(C.getTypeSize(C.IntTy), 0); |
| 535 | clang::Expr *Int0 = clang::IntegerLiteral::Create(C, Zero, C.IntTy, Loc); |
| 536 | clang::Expr *CastToNull = |
| 537 | clang::ImplicitCastExpr::Create(C, |
| 538 | C.NullPtrTy, |
| 539 | clang::CK_IntegralToPointer, |
| 540 | Int0, |
| 541 | NULL, |
| 542 | clang::VK_RValue); |
| 543 | |
Stephen Hines | e639eb5 | 2010-11-08 19:27:20 -0800 | [diff] [blame] | 544 | Res = new(C) clang::InitListExpr(C, Loc, &CastToNull, 1, Loc); |
Stephen Hines | 4b32ffd | 2010-11-05 18:47:11 -0700 | [diff] [blame] | 545 | break; |
| 546 | } |
| 547 | case RSExportPrimitiveType::DataTypeRSMatrix2x2: |
| 548 | case RSExportPrimitiveType::DataTypeRSMatrix3x3: |
| 549 | case RSExportPrimitiveType::DataTypeRSMatrix4x4: { |
| 550 | // RS matrix is not completely an RS object. They hold data by themselves. |
| 551 | // (InitListExpr rs_matrix2x2 |
| 552 | // (InitListExpr float[4] |
| 553 | // (FloatingLiteral 0) |
| 554 | // (FloatingLiteral 0) |
| 555 | // (FloatingLiteral 0) |
| 556 | // (FloatingLiteral 0))) |
| 557 | clang::QualType FloatTy = C.FloatTy; |
| 558 | // Constructor sets value to 0.0f by default |
| 559 | llvm::APFloat Val(C.getFloatTypeSemantics(FloatTy)); |
| 560 | clang::FloatingLiteral *Float0Val = |
| 561 | clang::FloatingLiteral::Create(C, |
| 562 | Val, |
| 563 | /* isExact = */true, |
| 564 | FloatTy, |
| 565 | Loc); |
| 566 | |
| 567 | unsigned N = 0; |
| 568 | if (DT == RSExportPrimitiveType::DataTypeRSMatrix2x2) |
| 569 | N = 2; |
| 570 | else if (DT == RSExportPrimitiveType::DataTypeRSMatrix3x3) |
| 571 | N = 3; |
| 572 | else if (DT == RSExportPrimitiveType::DataTypeRSMatrix4x4) |
| 573 | N = 4; |
| 574 | |
| 575 | // Directly allocate 16 elements instead of dynamically allocate N*N |
| 576 | clang::Expr *InitVals[16]; |
| 577 | for (unsigned i = 0; i < sizeof(InitVals) / sizeof(InitVals[0]); i++) |
| 578 | InitVals[i] = Float0Val; |
| 579 | clang::Expr *InitExpr = |
Stephen Hines | e639eb5 | 2010-11-08 19:27:20 -0800 | [diff] [blame] | 580 | new(C) clang::InitListExpr(C, Loc, InitVals, N * N, Loc); |
Stephen Hines | 4b32ffd | 2010-11-05 18:47:11 -0700 | [diff] [blame] | 581 | InitExpr->setType(C.getConstantArrayType(FloatTy, |
| 582 | llvm::APInt(32, 4), |
| 583 | clang::ArrayType::Normal, |
| 584 | /* EltTypeQuals = */0)); |
| 585 | |
Stephen Hines | e639eb5 | 2010-11-08 19:27:20 -0800 | [diff] [blame] | 586 | Res = new(C) clang::InitListExpr(C, Loc, &InitExpr, 1, Loc); |
Stephen Hines | 4b32ffd | 2010-11-05 18:47:11 -0700 | [diff] [blame] | 587 | break; |
| 588 | } |
| 589 | case RSExportPrimitiveType::DataTypeUnknown: |
| 590 | case RSExportPrimitiveType::DataTypeFloat16: |
| 591 | case RSExportPrimitiveType::DataTypeFloat32: |
| 592 | case RSExportPrimitiveType::DataTypeFloat64: |
| 593 | case RSExportPrimitiveType::DataTypeSigned8: |
| 594 | case RSExportPrimitiveType::DataTypeSigned16: |
| 595 | case RSExportPrimitiveType::DataTypeSigned32: |
| 596 | case RSExportPrimitiveType::DataTypeSigned64: |
| 597 | case RSExportPrimitiveType::DataTypeUnsigned8: |
| 598 | case RSExportPrimitiveType::DataTypeUnsigned16: |
| 599 | case RSExportPrimitiveType::DataTypeUnsigned32: |
| 600 | case RSExportPrimitiveType::DataTypeUnsigned64: |
| 601 | case RSExportPrimitiveType::DataTypeBoolean: |
| 602 | case RSExportPrimitiveType::DataTypeUnsigned565: |
| 603 | case RSExportPrimitiveType::DataTypeUnsigned5551: |
| 604 | case RSExportPrimitiveType::DataTypeUnsigned4444: |
| 605 | case RSExportPrimitiveType::DataTypeMax: { |
| 606 | assert(false && "Not RS object type!"); |
| 607 | } |
| 608 | // No default case will enable compiler detecting the missing cases |
| 609 | } |
| 610 | |
| 611 | return Res; |
| 612 | } |
| 613 | |
| 614 | void RSObjectRefCount::VisitDeclStmt(clang::DeclStmt *DS) { |
| 615 | for (clang::DeclStmt::decl_iterator I = DS->decl_begin(), E = DS->decl_end(); |
| 616 | I != E; |
| 617 | I++) { |
| 618 | clang::Decl *D = *I; |
| 619 | if (D->getKind() == clang::Decl::Var) { |
| 620 | clang::VarDecl *VD = static_cast<clang::VarDecl*>(D); |
| 621 | if (InitializeRSObject(VD)) |
| 622 | getCurrentScope()->addRSObject(VD); |
| 623 | } |
| 624 | } |
| 625 | return; |
| 626 | } |
| 627 | |
| 628 | void RSObjectRefCount::VisitCompoundStmt(clang::CompoundStmt *CS) { |
| 629 | if (!CS->body_empty()) { |
| 630 | // Push a new scope |
| 631 | Scope *S = new Scope(CS); |
| 632 | mScopeStack.push(S); |
| 633 | |
| 634 | VisitStmt(CS); |
| 635 | |
| 636 | // Destroy the scope |
Stephen Hines | e639eb5 | 2010-11-08 19:27:20 -0800 | [diff] [blame] | 637 | // TODO(srhines): Update reference count of the RS object refenced by |
| 638 | // getCurrentScope(). |
Stephen Hines | 4b32ffd | 2010-11-05 18:47:11 -0700 | [diff] [blame] | 639 | assert((getCurrentScope() == S) && "Corrupted scope stack!"); |
Stephen Hines | 1bdd497 | 2010-11-08 17:35:08 -0800 | [diff] [blame] | 640 | S->InsertLocalVarDestructors(); |
Stephen Hines | 4b32ffd | 2010-11-05 18:47:11 -0700 | [diff] [blame] | 641 | mScopeStack.pop(); |
| 642 | delete S; |
| 643 | } |
| 644 | return; |
| 645 | } |
| 646 | |
| 647 | void RSObjectRefCount::VisitBinAssign(clang::BinaryOperator *AS) { |
Stephen Hines | e639eb5 | 2010-11-08 19:27:20 -0800 | [diff] [blame] | 648 | // TODO(srhines): Update reference count |
Stephen Hines | 4b32ffd | 2010-11-05 18:47:11 -0700 | [diff] [blame] | 649 | return; |
| 650 | } |
| 651 | |
| 652 | void RSObjectRefCount::VisitStmt(clang::Stmt *S) { |
| 653 | for (clang::Stmt::child_iterator I = S->child_begin(), E = S->child_end(); |
| 654 | I != E; |
| 655 | I++) { |
| 656 | if (clang::Stmt *Child = *I) { |
| 657 | Visit(Child); |
| 658 | } |
| 659 | } |
| 660 | return; |
| 661 | } |
| 662 | |
Stephen Hines | e639eb5 | 2010-11-08 19:27:20 -0800 | [diff] [blame] | 663 | } // namespace slang |