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