1 /* 2 * Copyright (C) 2014 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 "compiler.h" 18 19 #include "base/logging.h" 20 #include "dex/quick/quick_compiler_factory.h" 21 #include "driver/compiler_driver.h" 22 #include "optimizing/optimizing_compiler.h" 23 #include "utils.h" 24 25 namespace art { 26 Create(CompilerDriver * driver,Compiler::Kind kind)27 Compiler* Compiler::Create(CompilerDriver* driver, Compiler::Kind kind) { 28 switch (kind) { 29 case kQuick: 30 return CreateQuickCompiler(driver); 31 32 case kOptimizing: 33 return CreateOptimizingCompiler(driver); 34 35 default: 36 LOG(FATAL) << "UNREACHABLE"; 37 UNREACHABLE(); 38 } 39 } 40 IsPathologicalCase(const DexFile::CodeItem & code_item,uint32_t method_idx,const DexFile & dex_file)41 bool Compiler::IsPathologicalCase(const DexFile::CodeItem& code_item, 42 uint32_t method_idx, 43 const DexFile& dex_file) { 44 /* 45 * Skip compilation for pathologically large methods - either by instruction count or num vregs. 46 * Dalvik uses 16-bit uints for instruction and register counts. We'll limit to a quarter 47 * of that, which also guarantees we cannot overflow our 16-bit internal Quick SSA name space. 48 */ 49 if (code_item.insns_size_in_code_units_ >= UINT16_MAX / 4) { 50 LOG(INFO) << "Method exceeds compiler instruction limit: " 51 << code_item.insns_size_in_code_units_ 52 << " in " << PrettyMethod(method_idx, dex_file); 53 return true; 54 } 55 if (code_item.registers_size_ >= UINT16_MAX / 4) { 56 LOG(INFO) << "Method exceeds compiler virtual register limit: " 57 << code_item.registers_size_ << " in " << PrettyMethod(method_idx, dex_file); 58 return true; 59 } 60 return false; 61 } 62 63 } // namespace art 64