Shinichiro Hamaji | e799275 | 2015-06-29 18:38:35 +0900 | [diff] [blame] | 1 | // Copyright 2015 Google Inc. All rights reserved |
| 2 | // |
| 3 | // Licensed under the Apache License, Version 2.0 (the "License"); |
| 4 | // you may not use this file except in compliance with the License. |
| 5 | // You may obtain a copy of the License at |
| 6 | // |
| 7 | // http://www.apache.org/licenses/LICENSE-2.0 |
| 8 | // |
| 9 | // Unless required by applicable law or agreed to in writing, software |
| 10 | // distributed under the License is distributed on an "AS IS" BASIS, |
| 11 | // WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
| 12 | // See the License for the specific language governing permissions and |
| 13 | // limitations under the License. |
| 14 | |
| 15 | // +build ignore |
| 16 | |
Shinichiro Hamaji | d18c427 | 2016-02-09 17:35:28 +0900 | [diff] [blame] | 17 | //#define ENABLE_TID_CHECK |
| 18 | |
Shinichiro Hamaji | e799275 | 2015-06-29 18:38:35 +0900 | [diff] [blame] | 19 | #include "symtab.h" |
| 20 | |
Shinichiro Hamaji | d18c427 | 2016-02-09 17:35:28 +0900 | [diff] [blame] | 21 | #ifdef ENABLE_TID_CHECK |
| 22 | #include <pthread.h> |
| 23 | #endif |
Shinichiro Hamaji | e799275 | 2015-06-29 18:38:35 +0900 | [diff] [blame] | 24 | #include <string.h> |
| 25 | |
| 26 | #include <unordered_map> |
| 27 | |
| 28 | #include "log.h" |
| 29 | #include "strutil.h" |
Shinichiro Hamaji | c9b9e5e | 2016-02-18 18:18:54 +0900 | [diff] [blame] | 30 | #include "var.h" |
| 31 | |
| 32 | struct SymbolData { |
Sasha Smundak | ae1d58c | 2018-08-22 09:39:42 -0700 | [diff] [blame] | 33 | SymbolData() : gv(Var::Undefined()) {} |
Shinichiro Hamaji | c9b9e5e | 2016-02-18 18:18:54 +0900 | [diff] [blame] | 34 | |
| 35 | Var* gv; |
| 36 | }; |
Shinichiro Hamaji | e799275 | 2015-06-29 18:38:35 +0900 | [diff] [blame] | 37 | |
Shinichiro Hamaji | ba2ccdb | 2015-07-17 05:55:42 +0900 | [diff] [blame] | 38 | vector<string*>* g_symbols; |
Shinichiro Hamaji | c9b9e5e | 2016-02-18 18:18:54 +0900 | [diff] [blame] | 39 | static vector<SymbolData> g_symbol_data; |
Shinichiro Hamaji | e799275 | 2015-06-29 18:38:35 +0900 | [diff] [blame] | 40 | |
Sasha Smundak | 8174f9b | 2018-08-13 11:07:30 -0700 | [diff] [blame] | 41 | Symbol kEmptySym; |
| 42 | Symbol kShellSym; |
| 43 | Symbol kKatiReadonlySym; |
Shinichiro Hamaji | 94d6f2a | 2015-07-05 05:32:25 +0900 | [diff] [blame] | 44 | |
Dan Willemsen | 3ce083f | 2017-10-11 22:17:48 -0700 | [diff] [blame] | 45 | Symbol::Symbol(int v) : v_(v) {} |
Shinichiro Hamaji | e799275 | 2015-06-29 18:38:35 +0900 | [diff] [blame] | 46 | |
Dan Willemsen | ff90ea3 | 2017-11-21 13:22:26 -0800 | [diff] [blame] | 47 | Var* Symbol::PeekGlobalVar() const { |
| 48 | if (static_cast<size_t>(v_) >= g_symbol_data.size()) { |
Sasha Smundak | ae1d58c | 2018-08-22 09:39:42 -0700 | [diff] [blame] | 49 | return Var::Undefined(); |
Dan Willemsen | ff90ea3 | 2017-11-21 13:22:26 -0800 | [diff] [blame] | 50 | } |
| 51 | return g_symbol_data[v_].gv; |
| 52 | } |
| 53 | |
Shinichiro Hamaji | c9b9e5e | 2016-02-18 18:18:54 +0900 | [diff] [blame] | 54 | Var* Symbol::GetGlobalVar() const { |
| 55 | if (static_cast<size_t>(v_) >= g_symbol_data.size()) { |
| 56 | g_symbol_data.resize(v_ + 1); |
| 57 | } |
| 58 | Var* v = g_symbol_data[v_].gv; |
| 59 | if (v->Origin() == VarOrigin::ENVIRONMENT || |
| 60 | v->Origin() == VarOrigin::ENVIRONMENT_OVERRIDE) { |
| 61 | Vars::add_used_env_vars(*this); |
| 62 | } |
| 63 | return v; |
| 64 | } |
| 65 | |
Dan Willemsen | f87d49e | 2016-09-29 20:09:47 -0700 | [diff] [blame] | 66 | void Symbol::SetGlobalVar(Var* v, bool is_override, bool* readonly) const { |
Shinichiro Hamaji | c9b9e5e | 2016-02-18 18:18:54 +0900 | [diff] [blame] | 67 | if (static_cast<size_t>(v_) >= g_symbol_data.size()) { |
| 68 | g_symbol_data.resize(v_ + 1); |
| 69 | } |
| 70 | Var* orig = g_symbol_data[v_].gv; |
Dan Willemsen | f87d49e | 2016-09-29 20:09:47 -0700 | [diff] [blame] | 71 | if (orig->ReadOnly()) { |
| 72 | if (readonly != nullptr) |
| 73 | *readonly = true; |
| 74 | else |
| 75 | ERROR("*** cannot assign to readonly variable: %s", c_str()); |
| 76 | return; |
| 77 | } else if (readonly != nullptr) { |
| 78 | *readonly = false; |
| 79 | } |
Dan Willemsen | 3ce083f | 2017-10-11 22:17:48 -0700 | [diff] [blame] | 80 | if (!is_override && (orig->Origin() == VarOrigin::OVERRIDE || |
| 81 | orig->Origin() == VarOrigin::ENVIRONMENT_OVERRIDE)) { |
Shinichiro Hamaji | c9b9e5e | 2016-02-18 18:18:54 +0900 | [diff] [blame] | 82 | return; |
| 83 | } |
Po Hu | 6957e9a | 2016-06-24 20:05:43 +0800 | [diff] [blame] | 84 | if (orig->Origin() == VarOrigin::COMMAND_LINE && |
Dan Willemsen | 3ce083f | 2017-10-11 22:17:48 -0700 | [diff] [blame] | 85 | v->Origin() == VarOrigin::FILE) { |
Po Hu | 6957e9a | 2016-06-24 20:05:43 +0800 | [diff] [blame] | 86 | return; |
| 87 | } |
Shinichiro Hamaji | c9b9e5e | 2016-02-18 18:18:54 +0900 | [diff] [blame] | 88 | if (orig->Origin() == VarOrigin::AUTOMATIC) { |
| 89 | ERROR("overriding automatic variable is not implemented yet"); |
| 90 | } |
| 91 | if (orig->IsDefined()) |
| 92 | delete orig; |
| 93 | g_symbol_data[v_].gv = v; |
| 94 | } |
| 95 | |
| 96 | ScopedGlobalVar::ScopedGlobalVar(Symbol name, Var* var) |
| 97 | : name_(name), orig_(NULL) { |
| 98 | orig_ = name.GetGlobalVar(); |
| 99 | g_symbol_data[name_.val()].gv = var; |
| 100 | } |
| 101 | |
| 102 | ScopedGlobalVar::~ScopedGlobalVar() { |
| 103 | g_symbol_data[name_.val()].gv = orig_; |
| 104 | } |
| 105 | |
Shinichiro Hamaji | e799275 | 2015-06-29 18:38:35 +0900 | [diff] [blame] | 106 | class Symtab { |
| 107 | public: |
| 108 | Symtab() { |
Shinichiro Hamaji | d18c427 | 2016-02-09 17:35:28 +0900 | [diff] [blame] | 109 | #ifdef ENABLE_TID_CHECK |
| 110 | tid_ = pthread_self(); |
| 111 | #endif |
| 112 | |
Shinichiro Hamaji | e799275 | 2015-06-29 18:38:35 +0900 | [diff] [blame] | 113 | CHECK(g_symbols == NULL); |
| 114 | g_symbols = &symbols_; |
Shinichiro Hamaji | 82aeb27 | 2015-06-30 02:24:36 +0900 | [diff] [blame] | 115 | |
| 116 | Symbol s = InternImpl(""); |
Shinichiro Hamaji | e799275 | 2015-06-29 18:38:35 +0900 | [diff] [blame] | 117 | CHECK(s.v_ == 0); |
| 118 | CHECK(Intern("") == s); |
Shinichiro Hamaji | 82aeb27 | 2015-06-30 02:24:36 +0900 | [diff] [blame] | 119 | char b[2]; |
| 120 | b[1] = 0; |
| 121 | for (int i = 1; i < 256; i++) { |
| 122 | b[0] = i; |
| 123 | s = InternImpl(b); |
| 124 | CHECK(s.val() == i); |
| 125 | } |
Shinichiro Hamaji | 94d6f2a | 2015-07-05 05:32:25 +0900 | [diff] [blame] | 126 | |
Shinichiro Hamaji | 43defe0 | 2015-07-11 07:06:43 +0900 | [diff] [blame] | 127 | kEmptySym = Intern(""); |
Shinichiro Hamaji | 94d6f2a | 2015-07-05 05:32:25 +0900 | [diff] [blame] | 128 | kShellSym = Intern("SHELL"); |
Sasha Smundak | 8174f9b | 2018-08-13 11:07:30 -0700 | [diff] [blame] | 129 | kKatiReadonlySym = Intern(".KATI_READONLY"); |
Shinichiro Hamaji | e799275 | 2015-06-29 18:38:35 +0900 | [diff] [blame] | 130 | } |
| 131 | |
Shinichiro Hamaji | ba2ccdb | 2015-07-17 05:55:42 +0900 | [diff] [blame] | 132 | ~Symtab() { |
Shinichiro Hamaji | 9f127b2 | 2015-10-28 18:08:47 +0900 | [diff] [blame] | 133 | LOG_STAT("%zu symbols", symbols_.size()); |
Shinichiro Hamaji | ba2ccdb | 2015-07-17 05:55:42 +0900 | [diff] [blame] | 134 | for (string* s : symbols_) |
| 135 | delete s; |
| 136 | } |
| 137 | |
Shinichiro Hamaji | 82aeb27 | 2015-06-30 02:24:36 +0900 | [diff] [blame] | 138 | Symbol InternImpl(StringPiece s) { |
Shinichiro Hamaji | e799275 | 2015-06-29 18:38:35 +0900 | [diff] [blame] | 139 | auto found = symtab_.find(s); |
| 140 | if (found != symtab_.end()) { |
| 141 | return found->second; |
| 142 | } |
Shinichiro Hamaji | ba2ccdb | 2015-07-17 05:55:42 +0900 | [diff] [blame] | 143 | symbols_.push_back(new string(s.data(), s.size())); |
Shinichiro Hamaji | e799275 | 2015-06-29 18:38:35 +0900 | [diff] [blame] | 144 | Symbol sym = Symbol(symtab_.size()); |
Shinichiro Hamaji | ba2ccdb | 2015-07-17 05:55:42 +0900 | [diff] [blame] | 145 | bool ok = symtab_.emplace(*symbols_.back(), sym).second; |
Shinichiro Hamaji | e799275 | 2015-06-29 18:38:35 +0900 | [diff] [blame] | 146 | CHECK(ok); |
| 147 | return sym; |
| 148 | } |
| 149 | |
Shinichiro Hamaji | 82aeb27 | 2015-06-30 02:24:36 +0900 | [diff] [blame] | 150 | Symbol Intern(StringPiece s) { |
Shinichiro Hamaji | d18c427 | 2016-02-09 17:35:28 +0900 | [diff] [blame] | 151 | #ifdef ENABLE_TID_CHECK |
| 152 | if (tid_ != pthread_self()) |
| 153 | abort(); |
| 154 | #endif |
| 155 | |
Shinichiro Hamaji | 82aeb27 | 2015-06-30 02:24:36 +0900 | [diff] [blame] | 156 | if (s.size() <= 1) { |
| 157 | return Symbol(s.empty() ? 0 : (unsigned char)s[0]); |
| 158 | } |
| 159 | return InternImpl(s); |
| 160 | } |
| 161 | |
Shinichiro Hamaji | e799275 | 2015-06-29 18:38:35 +0900 | [diff] [blame] | 162 | private: |
| 163 | unordered_map<StringPiece, Symbol> symtab_; |
Shinichiro Hamaji | ba2ccdb | 2015-07-17 05:55:42 +0900 | [diff] [blame] | 164 | vector<string*> symbols_; |
Shinichiro Hamaji | d18c427 | 2016-02-09 17:35:28 +0900 | [diff] [blame] | 165 | #ifdef ENABLE_TID_CHECK |
| 166 | pthread_t tid_; |
| 167 | #endif |
Shinichiro Hamaji | e799275 | 2015-06-29 18:38:35 +0900 | [diff] [blame] | 168 | }; |
| 169 | |
| 170 | static Symtab* g_symtab; |
| 171 | |
| 172 | void InitSymtab() { |
| 173 | g_symtab = new Symtab; |
| 174 | } |
| 175 | |
| 176 | void QuitSymtab() { |
| 177 | delete g_symtab; |
| 178 | } |
| 179 | |
| 180 | Symbol Intern(StringPiece s) { |
| 181 | return g_symtab->Intern(s); |
| 182 | } |
| 183 | |
| 184 | string JoinSymbols(const vector<Symbol>& syms, const char* sep) { |
| 185 | vector<string> strs; |
| 186 | for (Symbol s : syms) { |
| 187 | strs.push_back(s.str()); |
| 188 | } |
| 189 | return JoinStrings(strs, sep); |
| 190 | } |