slang.cpp revision be27482cdeaf08576bc39b72a15d35d13014a636
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.h" 18 19#include <stdlib.h> 20 21#include <string> 22#include <vector> 23 24#include "clang/AST/ASTConsumer.h" 25#include "clang/AST/ASTContext.h" 26 27#include "clang/Basic/DiagnosticIDs.h" 28#include "clang/Basic/FileManager.h" 29#include "clang/Basic/FileSystemOptions.h" 30#include "clang/Basic/LangOptions.h" 31#include "clang/Basic/SourceManager.h" 32#include "clang/Basic/TargetInfo.h" 33#include "clang/Basic/TargetOptions.h" 34 35#include "clang/Frontend/CodeGenOptions.h" 36#include "clang/Frontend/DiagnosticOptions.h" 37#include "clang/Frontend/DependencyOutputOptions.h" 38#include "clang/Frontend/FrontendDiagnostic.h" 39#include "clang/Frontend/TextDiagnosticPrinter.h" 40#include "clang/Frontend/Utils.h" 41 42#include "clang/Lex/Preprocessor.h" 43#include "clang/Lex/HeaderSearch.h" 44 45#include "clang/Parse/ParseAST.h" 46 47#include "llvm/ADT/IntrusiveRefCntPtr.h" 48 49#include "llvm/Bitcode/ReaderWriter.h" 50 51// More force linking 52#include "llvm/Linker.h" 53 54// Force linking all passes/vmcore stuffs to libslang.so 55#include "llvm/LinkAllPasses.h" 56#include "llvm/LinkAllVMCore.h" 57 58#include "llvm/Support/raw_ostream.h" 59#include "llvm/Support/MemoryBuffer.h" 60#include "llvm/Support/ErrorHandling.h" 61#include "llvm/Support/ManagedStatic.h" 62#include "llvm/Support/ToolOutputFile.h" 63#include "llvm/Support/Path.h" 64 65#include "llvm/Target/TargetSelect.h" 66 67#include "slang_assert.h" 68#include "slang_backend.h" 69#include "slang_utils.h" 70 71namespace { 72 73struct ForceSlangLinking { 74 ForceSlangLinking() { 75 // We must reference the functions in such a way that compilers will not 76 // delete it all as dead code, even with whole program optimization, 77 // yet is effectively a NO-OP. As the compiler isn't smart enough 78 // to know that getenv() never returns -1, this will do the job. 79 if (std::getenv("bar") != reinterpret_cast<char*>(-1)) 80 return; 81 82 // llvm-rs-link needs following functions existing in libslang. 83 llvm::ParseBitcodeFile(NULL, llvm::getGlobalContext(), NULL); 84 llvm::Linker::LinkModules(NULL, NULL, NULL); 85 86 // llvm-rs-cc need this. 87 new clang::TextDiagnosticPrinter(llvm::errs(), 88 clang::DiagnosticOptions()); 89 } 90} ForceSlangLinking; 91 92} // namespace 93 94namespace slang { 95 96#if defined(__arm__) 97# define DEFAULT_TARGET_TRIPLE_STRING "armv7-none-linux-gnueabi" 98#elif defined(__x86_64__) 99# define DEFAULT_TARGET_TRIPLE_STRING "x86_64-unknown-linux" 100#else 101// let's use x86 as default target 102# define DEFAULT_TARGET_TRIPLE_STRING "i686-unknown-linux" 103#endif 104 105bool Slang::GlobalInitialized = false; 106 107// Language option (define the language feature for compiler such as C99) 108clang::LangOptions Slang::LangOpts; 109 110// Code generation option for the compiler 111clang::CodeGenOptions Slang::CodeGenOpts; 112 113// The named of metadata node that pragma resides (should be synced with 114// bcc.cpp) 115const llvm::StringRef Slang::PragmaMetadataName = "#pragma"; 116 117static inline llvm::tool_output_file *OpenOutputFile(const char *OutputFile, 118 unsigned Flags, 119 std::string* Error, 120 clang::Diagnostic* Diag) { 121 slangAssert((OutputFile != NULL) && (Error != NULL) && (Diag != NULL) && 122 "Invalid parameter!"); 123 124 llvm::sys::Path OutputFilePath(OutputFile); 125 126 if (SlangUtils::CreateDirectoryWithParents(OutputFilePath.getDirname(), 127 Error)) { 128 llvm::tool_output_file *F = 129 new llvm::tool_output_file(OutputFile, *Error, Flags); 130 if (F != NULL) 131 return F; 132 } 133 134 // Report error here. 135 Diag->Report(clang::diag::err_fe_error_opening) << OutputFile << *Error; 136 137 return NULL; 138} 139 140void Slang::GlobalInitialization() { 141 if (!GlobalInitialized) { 142 // We only support x86, x64 and ARM target 143 144 // For ARM 145 LLVMInitializeARMTargetInfo(); 146 LLVMInitializeARMTarget(); 147 LLVMInitializeARMAsmPrinter(); 148 149 // For x86 and x64 150 LLVMInitializeX86TargetInfo(); 151 LLVMInitializeX86Target(); 152 LLVMInitializeX86AsmPrinter(); 153 154 // Please refer to include/clang/Basic/LangOptions.h to setup 155 // the options. 156 LangOpts.RTTI = 0; // Turn off the RTTI information support 157 LangOpts.NeXTRuntime = 0; // Turn off the NeXT runtime uses 158 LangOpts.C99 = 1; 159 160 CodeGenOpts.OptimizationLevel = 3; /* -O3 */ 161 162 GlobalInitialized = true; 163 } 164 165 return; 166} 167 168void Slang::LLVMErrorHandler(void *UserData, const std::string &Message) { 169 clang::Diagnostic* Diags = static_cast<clang::Diagnostic*>(UserData); 170 Diags->Report(clang::diag::err_fe_error_backend) << Message; 171 exit(1); 172} 173 174void Slang::createDiagnostic() { 175 mDiagClient = new DiagnosticBuffer(); 176 mDiagIDs = new clang::DiagnosticIDs(); 177 mDiagnostics = new clang::Diagnostic(mDiagIDs, mDiagClient, true); 178 initDiagnostic(); 179 return; 180} 181 182void Slang::createTarget(const std::string &Triple, const std::string &CPU, 183 const std::vector<std::string> &Features) { 184 if (!Triple.empty()) 185 mTargetOpts.Triple = Triple; 186 else 187 mTargetOpts.Triple = DEFAULT_TARGET_TRIPLE_STRING; 188 189 if (!CPU.empty()) 190 mTargetOpts.CPU = CPU; 191 192 if (!Features.empty()) 193 mTargetOpts.Features = Features; 194 195 mTarget.reset(clang::TargetInfo::CreateTargetInfo(*mDiagnostics, 196 mTargetOpts)); 197 198 return; 199} 200 201void Slang::createFileManager() { 202 mFileSysOpt.reset(new clang::FileSystemOptions()); 203 mFileMgr.reset(new clang::FileManager(*mFileSysOpt)); 204} 205 206void Slang::createSourceManager() { 207 mSourceMgr.reset(new clang::SourceManager(*mDiagnostics, *mFileMgr)); 208 return; 209} 210 211void Slang::createPreprocessor() { 212 // Default only search header file in current dir 213 clang::HeaderSearch *HS = new clang::HeaderSearch(*mFileMgr); 214 215 mPP.reset(new clang::Preprocessor(*mDiagnostics, 216 LangOpts, 217 *mTarget, 218 *mSourceMgr, 219 *HS, 220 NULL, 221 /* OwnsHeaderSearch = */true)); 222 // Initialize the preprocessor 223 mPragmas.clear(); 224 mPP->AddPragmaHandler(new PragmaRecorder(&mPragmas)); 225 226 std::vector<clang::DirectoryLookup> SearchList; 227 for (unsigned i = 0, e = mIncludePaths.size(); i != e; i++) { 228 if (const clang::DirectoryEntry *DE = 229 mFileMgr->getDirectory(mIncludePaths[i])) { 230 SearchList.push_back(clang::DirectoryLookup(DE, 231 clang::SrcMgr::C_System, 232 false, 233 false)); 234 } 235 } 236 237 HS->SetSearchPaths(SearchList, 1, false); 238 239 initPreprocessor(); 240 return; 241} 242 243void Slang::createASTContext() { 244 mASTContext.reset(new clang::ASTContext(LangOpts, 245 *mSourceMgr, 246 *mTarget, 247 mPP->getIdentifierTable(), 248 mPP->getSelectorTable(), 249 mPP->getBuiltinInfo(), 250 /* size_reserve = */0)); 251 initASTContext(); 252 return; 253} 254 255clang::ASTConsumer 256*Slang::createBackend(const clang::CodeGenOptions& CodeGenOpts, 257 llvm::raw_ostream *OS, 258 OutputType OT) { 259 return new Backend(mDiagnostics.getPtr(), 260 CodeGenOpts, 261 mTargetOpts, 262 &mPragmas, 263 OS, 264 OT); 265} 266 267Slang::Slang() : mInitialized(false), mDiagClient(NULL), mOT(OT_Default) { 268 GlobalInitialization(); 269 return; 270} 271 272void Slang::init(const std::string &Triple, const std::string &CPU, 273 const std::vector<std::string> &Features) { 274 if (mInitialized) 275 return; 276 277 createDiagnostic(); 278 llvm::install_fatal_error_handler(LLVMErrorHandler, mDiagnostics.getPtr()); 279 280 createTarget(Triple, CPU, Features); 281 createFileManager(); 282 createSourceManager(); 283 284 mInitialized = true; 285 286 return; 287} 288 289bool Slang::setInputSource(llvm::StringRef InputFile, 290 const char *Text, 291 size_t TextLength) { 292 mInputFileName = InputFile.str(); 293 294 // Reset the ID tables if we are reusing the SourceManager 295 mSourceMgr->clearIDTables(); 296 297 // Load the source 298 llvm::MemoryBuffer *SB = 299 llvm::MemoryBuffer::getMemBuffer(Text, Text + TextLength); 300 mSourceMgr->createMainFileIDForMemBuffer(SB); 301 302 if (mSourceMgr->getMainFileID().isInvalid()) { 303 mDiagnostics->Report(clang::diag::err_fe_error_reading) << InputFile; 304 return false; 305 } 306 return true; 307} 308 309bool Slang::setInputSource(llvm::StringRef InputFile) { 310 mInputFileName = InputFile.str(); 311 312 mSourceMgr->clearIDTables(); 313 314 const clang::FileEntry *File = mFileMgr->getFile(InputFile); 315 if (File) 316 mSourceMgr->createMainFileID(File); 317 318 if (mSourceMgr->getMainFileID().isInvalid()) { 319 mDiagnostics->Report(clang::diag::err_fe_error_reading) << InputFile; 320 return false; 321 } 322 323 return true; 324} 325 326bool Slang::setOutput(const char *OutputFile) { 327 llvm::sys::Path OutputFilePath(OutputFile); 328 std::string Error; 329 llvm::tool_output_file *OS = NULL; 330 331 switch (mOT) { 332 case OT_Dependency: 333 case OT_Assembly: 334 case OT_LLVMAssembly: { 335 OS = OpenOutputFile(OutputFile, 0, &Error, mDiagnostics.getPtr()); 336 break; 337 } 338 case OT_Nothing: { 339 break; 340 } 341 case OT_Object: 342 case OT_Bitcode: { 343 OS = OpenOutputFile(OutputFile, 344 llvm::raw_fd_ostream::F_Binary, 345 &Error, 346 mDiagnostics.getPtr()); 347 break; 348 } 349 default: { 350 llvm_unreachable("Unknown compiler output type"); 351 } 352 } 353 354 if (!Error.empty()) 355 return false; 356 357 mOS.reset(OS); 358 359 mOutputFileName = OutputFile; 360 361 return true; 362} 363 364bool Slang::setDepOutput(const char *OutputFile) { 365 llvm::sys::Path OutputFilePath(OutputFile); 366 std::string Error; 367 368 mDOS.reset(OpenOutputFile(OutputFile, 0, &Error, mDiagnostics.getPtr())); 369 if (!Error.empty() || (mDOS.get() == NULL)) 370 return false; 371 372 mDepOutputFileName = OutputFile; 373 374 return true; 375} 376 377int Slang::generateDepFile() { 378 if (mDiagnostics->hasErrorOccurred()) 379 return 1; 380 if (mDOS.get() == NULL) 381 return 1; 382 383 // Initialize options for generating dependency file 384 clang::DependencyOutputOptions DepOpts; 385 DepOpts.IncludeSystemHeaders = 1; 386 DepOpts.OutputFile = mDepOutputFileName; 387 DepOpts.Targets = mAdditionalDepTargets; 388 DepOpts.Targets.push_back(mDepTargetBCFileName); 389 for (std::vector<std::string>::const_iterator 390 I = mGeneratedFileNames.begin(), E = mGeneratedFileNames.end(); 391 I != E; 392 I++) { 393 DepOpts.Targets.push_back(*I); 394 } 395 mGeneratedFileNames.clear(); 396 397 // Per-compilation needed initialization 398 createPreprocessor(); 399 AttachDependencyFileGen(*mPP.get(), DepOpts); 400 401 // Inform the diagnostic client we are processing a source file 402 mDiagClient->BeginSourceFile(LangOpts, mPP.get()); 403 404 // Go through the source file (no operations necessary) 405 clang::Token Tok; 406 mPP->EnterMainSourceFile(); 407 do { 408 mPP->Lex(Tok); 409 } while (Tok.isNot(clang::tok::eof)); 410 411 mPP->EndSourceFile(); 412 413 // Declare success if no error 414 if (!mDiagnostics->hasErrorOccurred()) 415 mDOS->keep(); 416 417 // Clean up after compilation 418 mPP.reset(); 419 mDOS.reset(); 420 421 return mDiagnostics->hasErrorOccurred() ? 1 : 0; 422} 423 424int Slang::compile() { 425 if (mDiagnostics->hasErrorOccurred()) 426 return 1; 427 if (mOS.get() == NULL) 428 return 1; 429 430 // Here is per-compilation needed initialization 431 createPreprocessor(); 432 createASTContext(); 433 434 mBackend.reset(createBackend(CodeGenOpts, &mOS->os(), mOT)); 435 436 // Inform the diagnostic client we are processing a source file 437 mDiagClient->BeginSourceFile(LangOpts, mPP.get()); 438 439 // The core of the slang compiler 440 ParseAST(*mPP, mBackend.get(), *mASTContext); 441 442 // Inform the diagnostic client we are done with previous source file 443 mDiagClient->EndSourceFile(); 444 445 // Declare success if no error 446 if (!mDiagnostics->hasErrorOccurred()) 447 mOS->keep(); 448 449 // The compilation ended, clear 450 mBackend.reset(); 451 mASTContext.reset(); 452 mPP.reset(); 453 mOS.reset(); 454 455 return mDiagnostics->hasErrorOccurred() ? 1 : 0; 456} 457 458void Slang::reset() { 459 mDiagnostics->Reset(); 460 mDiagClient->reset(); 461 return; 462} 463 464Slang::~Slang() { 465 llvm::llvm_shutdown(); 466 return; 467} 468 469} // namespace slang 470