slang_rs_context.cpp revision c808a99831115928b4648f4c8b86dc682594217a
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_context.h" 18 19#include <string> 20 21#include "clang/AST/ASTContext.h" 22#include "clang/AST/Decl.h" 23#include "clang/AST/DeclBase.h" 24#include "clang/AST/Type.h" 25 26#include "clang/Basic/Linkage.h" 27#include "clang/Basic/TargetInfo.h" 28 29#include "clang/Index/ASTLocation.h" 30 31#include "llvm/LLVMContext.h" 32 33#include "llvm/Target/TargetData.h" 34 35#include "slang.h" 36#include "slang_rs_export_func.h" 37#include "slang_rs_export_type.h" 38#include "slang_rs_export_var.h" 39#include "slang_rs_exportable.h" 40#include "slang_rs_pragma_handler.h" 41#include "slang_rs_reflection.h" 42 43namespace slang { 44 45RSContext::RSContext(clang::Preprocessor &PP, 46 clang::ASTContext &Ctx, 47 const clang::TargetInfo &Target) 48 : mPP(PP), 49 mCtx(Ctx), 50 mTarget(Target), 51 mTargetData(NULL), 52 mLLVMContext(llvm::getGlobalContext()), 53 mLicenseNote(NULL) { 54 // For #pragma rs export_type 55 PP.AddPragmaHandler( 56 "rs", RSPragmaHandler::CreatePragmaExportTypeHandler(this)); 57 58 // For #pragma rs java_package_name 59 PP.AddPragmaHandler( 60 "rs", RSPragmaHandler::CreatePragmaJavaPackageNameHandler(this)); 61 62 // For #pragma rs set_reflect_license 63 PP.AddPragmaHandler( 64 "rs", RSPragmaHandler::CreatePragmaReflectLicenseHandler(this)); 65 66 // Prepare target data 67 mTargetData = new llvm::TargetData(Target.getTargetDescription()); 68 69 return; 70} 71 72bool RSContext::processExportVar(const clang::VarDecl *VD) { 73 assert(!VD->getName().empty() && "Variable name should not be empty"); 74 75 // TODO(zonr): some check on variable 76 77 RSExportType *ET = RSExportType::CreateFromDecl(this, VD); 78 if (!ET) 79 return false; 80 81 RSExportVar *EV = new RSExportVar(this, VD, ET); 82 if (EV == NULL) 83 return false; 84 else 85 mExportVars.push_back(EV); 86 87 return true; 88} 89 90static bool isSpecialRSFunc(const llvm::StringRef& Name) { 91 static llvm::StringRef FuncInit("init"); 92 static llvm::StringRef FuncRoot("root"); 93 return Name.equals(FuncInit) || Name.equals(FuncRoot); 94} 95 96bool RSContext::processExportFunc(const clang::FunctionDecl *FD) { 97 assert(!FD->getName().empty() && "Function name should not be empty"); 98 99 if (!FD->isThisDeclarationADefinition()) { 100 return true; 101 } 102 103 if (FD->getStorageClass() != clang::SC_None) { 104 fprintf(stderr, "RSContext::processExportFunc : cannot export extern or " 105 "static function '%s'\n", FD->getName().str().c_str()); 106 return false; 107 } 108 109 // Do not reflect specialized RS functions like init/root. 110 if (isSpecialRSFunc(FD->getName())) { 111 return true; 112 } 113 114 RSExportFunc *EF = RSExportFunc::Create(this, FD); 115 if (EF == NULL) 116 return false; 117 else 118 mExportFuncs.push_back(EF); 119 120 return true; 121} 122 123 124bool RSContext::processExportType(const llvm::StringRef &Name) { 125 clang::TranslationUnitDecl *TUDecl = mCtx.getTranslationUnitDecl(); 126 127 assert(TUDecl != NULL && "Translation unit declaration (top-level " 128 "declaration) is null object"); 129 130 const clang::IdentifierInfo *II = mPP.getIdentifierInfo(Name); 131 if (II == NULL) 132 // TODO(zonr): alert identifier @Name mark as an exportable type cannot be 133 // found 134 return false; 135 136 clang::DeclContext::lookup_const_result R = TUDecl->lookup(II); 137 RSExportType *ET = NULL; 138 139 RSExportPointerType::IntegerType = mCtx.IntTy.getTypePtr(); 140 141 for (clang::DeclContext::lookup_const_iterator I = R.first, E = R.second; 142 I != E; 143 I++) { 144 clang::NamedDecl *const ND = *I; 145 const clang::Type *T = NULL; 146 147 switch (ND->getKind()) { 148 case clang::Decl::Typedef: { 149 T = static_cast<const clang::TypedefDecl*>( 150 ND)->getCanonicalDecl()->getUnderlyingType().getTypePtr(); 151 break; 152 } 153 case clang::Decl::Record: { 154 T = static_cast<const clang::RecordDecl*>(ND)->getTypeForDecl(); 155 break; 156 } 157 default: { 158 // unsupported, skip 159 break; 160 } 161 } 162 163 if (T != NULL) 164 ET = RSExportType::Create(this, T); 165 } 166 167 RSExportPointerType::IntegerType = NULL; 168 169 return (ET != NULL); 170} 171 172bool RSContext::processExport() { 173 // Export variable 174 clang::TranslationUnitDecl *TUDecl = mCtx.getTranslationUnitDecl(); 175 for (clang::DeclContext::decl_iterator DI = TUDecl->decls_begin(), 176 DE = TUDecl->decls_end(); 177 DI != TUDecl->decls_end(); 178 DI++) { 179 if (DI->getKind() == clang::Decl::Var) { 180 clang::VarDecl *VD = (clang::VarDecl*) (*DI); 181 if (VD->getLinkage() == clang::ExternalLinkage) { 182 if (!processExportVar(VD)) { 183 fprintf(stderr, "RSContext::processExport : failed to export var " 184 "'%s'\n", VD->getNameAsString().c_str()); 185 return false; 186 } 187 } 188 } else if (DI->getKind() == clang::Decl::Function) { 189 // Export functions 190 clang::FunctionDecl *FD = (clang::FunctionDecl*) (*DI); 191 if (FD->getLinkage() == clang::ExternalLinkage) { 192 if (!processExportFunc(FD)) { 193 fprintf(stderr, "RSContext::processExport : failed to export func " 194 "'%s'\n", FD->getNameAsString().c_str()); 195 return false; 196 } 197 } 198 } 199 } 200 201 // Finally, export type forcely set to be exported by user 202 for (NeedExportTypeSet::const_iterator EI = mNeedExportTypes.begin(), 203 EE = mNeedExportTypes.end(); 204 EI != EE; 205 EI++) { 206 if (!processExportType(EI->getKey())) { 207 fprintf(stderr, "RSContext::processExport : failed to export type " 208 "'%s'\n", EI->getKey().str().c_str()); 209 return false; 210 } 211 } 212 213 return true; 214} 215 216bool RSContext::insertExportType(const llvm::StringRef &TypeName, 217 RSExportType *ET) { 218 ExportTypeMap::value_type *NewItem = 219 ExportTypeMap::value_type::Create(TypeName.begin(), 220 TypeName.end(), 221 mExportTypes.getAllocator(), 222 ET); 223 224 if (mExportTypes.insert(NewItem)) { 225 return true; 226 } else { 227 free(NewItem); 228 return false; 229 } 230} 231 232bool RSContext::reflectToJava(const std::string &OutputPathBase, 233 const std::string &OutputPackageName, 234 const std::string &InputFileName, 235 const std::string &OutputBCFileName, 236 std::string *RealPackageName) { 237 if (RealPackageName != NULL) 238 RealPackageName->clear(); 239 240 const std::string &PackageName = 241 ((OutputPackageName.empty()) ? mReflectJavaPackageName : 242 OutputPackageName); 243 if (PackageName.empty()) { 244 std::cerr << "Error: Missing \"#pragma rs " 245 << "java_package_name(com.foo.bar)\" in " 246 << InputFileName << std::endl; 247 return false; 248 } 249 250 // Copy back the really applied package name 251 RealPackageName->assign(PackageName); 252 253 RSReflection *R = new RSReflection(this); 254 bool ret = R->reflect(OutputPathBase, PackageName, 255 InputFileName, OutputBCFileName); 256 if (!ret) 257 fprintf(stderr, "RSContext::reflectToJava : failed to do reflection " 258 "(%s)\n", R->getLastError()); 259 delete R; 260 return ret; 261} 262 263RSContext::~RSContext() { 264 delete mLicenseNote; 265 delete mTargetData; 266 for (ExportableList::iterator I = mExportables.begin(), 267 E = mExportables.end(); 268 I != E; 269 I++) { 270 if (!(*I)->isKeep()) 271 delete *I; 272 } 273} 274 275} // namespace slang 276