Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 1 | // Copyright 2006-2008 the V8 project authors. All rights reserved. |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 2 | // Use of this source code is governed by a BSD-style license that can be |
| 3 | // found in the LICENSE file. |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 4 | |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame] | 5 | #include "src/flags.h" |
| 6 | |
Emily Bernier | d0a1eb7 | 2015-03-24 16:35:39 -0400 | [diff] [blame] | 7 | #include <cctype> |
| 8 | #include <cstdlib> |
| 9 | #include <sstream> |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 10 | |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame] | 11 | #include "src/allocation.h" |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 12 | #include "src/assembler.h" |
Emily Bernier | d0a1eb7 | 2015-03-24 16:35:39 -0400 | [diff] [blame] | 13 | #include "src/base/functional.h" |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 14 | #include "src/base/platform/platform.h" |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame] | 15 | #include "src/list-inl.h" |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 16 | #include "src/ostreams.h" |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame] | 17 | #include "src/utils.h" |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 18 | |
| 19 | namespace v8 { |
| 20 | namespace internal { |
| 21 | |
| 22 | // Define all of our flags. |
| 23 | #define FLAG_MODE_DEFINE |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame] | 24 | #include "src/flag-definitions.h" // NOLINT(build/include) |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 25 | |
| 26 | // Define all of our flags default values. |
| 27 | #define FLAG_MODE_DEFINE_DEFAULTS |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame] | 28 | #include "src/flag-definitions.h" // NOLINT(build/include) |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 29 | |
| 30 | namespace { |
| 31 | |
| 32 | // This structure represents a single entry in the flag system, with a pointer |
| 33 | // to the actual flag, default value, comment, etc. This is designed to be POD |
| 34 | // initialized as to avoid requiring static constructors. |
| 35 | struct Flag { |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 36 | enum FlagType { TYPE_BOOL, TYPE_MAYBE_BOOL, TYPE_INT, TYPE_FLOAT, |
| 37 | TYPE_STRING, TYPE_ARGS }; |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 38 | |
| 39 | FlagType type_; // What type of flag, bool, int, or string. |
| 40 | const char* name_; // Name of the flag, ex "my_flag". |
| 41 | void* valptr_; // Pointer to the global flag variable. |
| 42 | const void* defptr_; // Pointer to the default value. |
| 43 | const char* cmt_; // A comment about the flags purpose. |
| 44 | bool owns_ptr_; // Does the flag own its string value? |
| 45 | |
| 46 | FlagType type() const { return type_; } |
| 47 | |
| 48 | const char* name() const { return name_; } |
| 49 | |
| 50 | const char* comment() const { return cmt_; } |
| 51 | |
| 52 | bool* bool_variable() const { |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 53 | DCHECK(type_ == TYPE_BOOL); |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 54 | return reinterpret_cast<bool*>(valptr_); |
| 55 | } |
| 56 | |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 57 | MaybeBoolFlag* maybe_bool_variable() const { |
| 58 | DCHECK(type_ == TYPE_MAYBE_BOOL); |
| 59 | return reinterpret_cast<MaybeBoolFlag*>(valptr_); |
| 60 | } |
| 61 | |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 62 | int* int_variable() const { |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 63 | DCHECK(type_ == TYPE_INT); |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 64 | return reinterpret_cast<int*>(valptr_); |
| 65 | } |
| 66 | |
| 67 | double* float_variable() const { |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 68 | DCHECK(type_ == TYPE_FLOAT); |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 69 | return reinterpret_cast<double*>(valptr_); |
| 70 | } |
| 71 | |
| 72 | const char* string_value() const { |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 73 | DCHECK(type_ == TYPE_STRING); |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 74 | return *reinterpret_cast<const char**>(valptr_); |
| 75 | } |
| 76 | |
| 77 | void set_string_value(const char* value, bool owns_ptr) { |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 78 | DCHECK(type_ == TYPE_STRING); |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 79 | const char** ptr = reinterpret_cast<const char**>(valptr_); |
| 80 | if (owns_ptr_ && *ptr != NULL) DeleteArray(*ptr); |
| 81 | *ptr = value; |
| 82 | owns_ptr_ = owns_ptr; |
| 83 | } |
| 84 | |
| 85 | JSArguments* args_variable() const { |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 86 | DCHECK(type_ == TYPE_ARGS); |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 87 | return reinterpret_cast<JSArguments*>(valptr_); |
| 88 | } |
| 89 | |
| 90 | bool bool_default() const { |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 91 | DCHECK(type_ == TYPE_BOOL); |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 92 | return *reinterpret_cast<const bool*>(defptr_); |
| 93 | } |
| 94 | |
| 95 | int int_default() const { |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 96 | DCHECK(type_ == TYPE_INT); |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 97 | return *reinterpret_cast<const int*>(defptr_); |
| 98 | } |
| 99 | |
| 100 | double float_default() const { |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 101 | DCHECK(type_ == TYPE_FLOAT); |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 102 | return *reinterpret_cast<const double*>(defptr_); |
| 103 | } |
| 104 | |
| 105 | const char* string_default() const { |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 106 | DCHECK(type_ == TYPE_STRING); |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 107 | return *reinterpret_cast<const char* const *>(defptr_); |
| 108 | } |
| 109 | |
| 110 | JSArguments args_default() const { |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 111 | DCHECK(type_ == TYPE_ARGS); |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 112 | return *reinterpret_cast<const JSArguments*>(defptr_); |
| 113 | } |
| 114 | |
| 115 | // Compare this flag's current value against the default. |
| 116 | bool IsDefault() const { |
| 117 | switch (type_) { |
| 118 | case TYPE_BOOL: |
| 119 | return *bool_variable() == bool_default(); |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 120 | case TYPE_MAYBE_BOOL: |
| 121 | return maybe_bool_variable()->has_value == false; |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 122 | case TYPE_INT: |
| 123 | return *int_variable() == int_default(); |
| 124 | case TYPE_FLOAT: |
| 125 | return *float_variable() == float_default(); |
| 126 | case TYPE_STRING: { |
| 127 | const char* str1 = string_value(); |
| 128 | const char* str2 = string_default(); |
| 129 | if (str2 == NULL) return str1 == NULL; |
| 130 | if (str1 == NULL) return str2 == NULL; |
| 131 | return strcmp(str1, str2) == 0; |
| 132 | } |
| 133 | case TYPE_ARGS: |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 134 | return args_variable()->argc == 0; |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 135 | } |
| 136 | UNREACHABLE(); |
| 137 | return true; |
| 138 | } |
| 139 | |
| 140 | // Set a flag back to it's default value. |
| 141 | void Reset() { |
| 142 | switch (type_) { |
| 143 | case TYPE_BOOL: |
| 144 | *bool_variable() = bool_default(); |
| 145 | break; |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 146 | case TYPE_MAYBE_BOOL: |
| 147 | *maybe_bool_variable() = MaybeBoolFlag::Create(false, false); |
| 148 | break; |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 149 | case TYPE_INT: |
| 150 | *int_variable() = int_default(); |
| 151 | break; |
| 152 | case TYPE_FLOAT: |
| 153 | *float_variable() = float_default(); |
| 154 | break; |
| 155 | case TYPE_STRING: |
| 156 | set_string_value(string_default(), false); |
| 157 | break; |
| 158 | case TYPE_ARGS: |
| 159 | *args_variable() = args_default(); |
| 160 | break; |
| 161 | } |
| 162 | } |
| 163 | }; |
| 164 | |
| 165 | Flag flags[] = { |
| 166 | #define FLAG_MODE_META |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame] | 167 | #include "src/flag-definitions.h" // NOLINT(build/include) |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 168 | }; |
| 169 | |
| 170 | const size_t num_flags = sizeof(flags) / sizeof(*flags); |
| 171 | |
| 172 | } // namespace |
| 173 | |
| 174 | |
| 175 | static const char* Type2String(Flag::FlagType type) { |
| 176 | switch (type) { |
| 177 | case Flag::TYPE_BOOL: return "bool"; |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 178 | case Flag::TYPE_MAYBE_BOOL: return "maybe_bool"; |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 179 | case Flag::TYPE_INT: return "int"; |
| 180 | case Flag::TYPE_FLOAT: return "float"; |
| 181 | case Flag::TYPE_STRING: return "string"; |
| 182 | case Flag::TYPE_ARGS: return "arguments"; |
| 183 | } |
| 184 | UNREACHABLE(); |
| 185 | return NULL; |
| 186 | } |
| 187 | |
| 188 | |
Emily Bernier | d0a1eb7 | 2015-03-24 16:35:39 -0400 | [diff] [blame] | 189 | std::ostream& operator<<(std::ostream& os, const Flag& flag) { // NOLINT |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 190 | switch (flag.type()) { |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 191 | case Flag::TYPE_BOOL: |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 192 | os << (*flag.bool_variable() ? "true" : "false"); |
| 193 | break; |
| 194 | case Flag::TYPE_MAYBE_BOOL: |
| 195 | os << (flag.maybe_bool_variable()->has_value |
| 196 | ? (flag.maybe_bool_variable()->value ? "true" : "false") |
| 197 | : "unset"); |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 198 | break; |
| 199 | case Flag::TYPE_INT: |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 200 | os << *flag.int_variable(); |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 201 | break; |
| 202 | case Flag::TYPE_FLOAT: |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 203 | os << *flag.float_variable(); |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 204 | break; |
| 205 | case Flag::TYPE_STRING: { |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 206 | const char* str = flag.string_value(); |
| 207 | os << (str ? str : "NULL"); |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 208 | break; |
| 209 | } |
| 210 | case Flag::TYPE_ARGS: { |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 211 | JSArguments args = *flag.args_variable(); |
| 212 | if (args.argc > 0) { |
| 213 | os << args[0]; |
| 214 | for (int i = 1; i < args.argc; i++) { |
| 215 | os << args[i]; |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 216 | } |
| 217 | } |
| 218 | break; |
| 219 | } |
| 220 | } |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 221 | return os; |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 222 | } |
| 223 | |
| 224 | |
| 225 | // static |
| 226 | List<const char*>* FlagList::argv() { |
| 227 | List<const char*>* args = new List<const char*>(8); |
| 228 | Flag* args_flag = NULL; |
| 229 | for (size_t i = 0; i < num_flags; ++i) { |
| 230 | Flag* f = &flags[i]; |
| 231 | if (!f->IsDefault()) { |
| 232 | if (f->type() == Flag::TYPE_ARGS) { |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 233 | DCHECK(args_flag == NULL); |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 234 | args_flag = f; // Must be last in arguments. |
| 235 | continue; |
| 236 | } |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 237 | { |
| 238 | bool disabled = f->type() == Flag::TYPE_BOOL && !*f->bool_variable(); |
Emily Bernier | d0a1eb7 | 2015-03-24 16:35:39 -0400 | [diff] [blame] | 239 | std::ostringstream os; |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 240 | os << (disabled ? "--no" : "--") << f->name(); |
Emily Bernier | d0a1eb7 | 2015-03-24 16:35:39 -0400 | [diff] [blame] | 241 | args->Add(StrDup(os.str().c_str())); |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 242 | } |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 243 | if (f->type() != Flag::TYPE_BOOL) { |
Emily Bernier | d0a1eb7 | 2015-03-24 16:35:39 -0400 | [diff] [blame] | 244 | std::ostringstream os; |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 245 | os << *f; |
Emily Bernier | d0a1eb7 | 2015-03-24 16:35:39 -0400 | [diff] [blame] | 246 | args->Add(StrDup(os.str().c_str())); |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 247 | } |
| 248 | } |
| 249 | } |
| 250 | if (args_flag != NULL) { |
Emily Bernier | d0a1eb7 | 2015-03-24 16:35:39 -0400 | [diff] [blame] | 251 | std::ostringstream os; |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 252 | os << "--" << args_flag->name(); |
Emily Bernier | d0a1eb7 | 2015-03-24 16:35:39 -0400 | [diff] [blame] | 253 | args->Add(StrDup(os.str().c_str())); |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 254 | JSArguments jsargs = *args_flag->args_variable(); |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 255 | for (int j = 0; j < jsargs.argc; j++) { |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 256 | args->Add(StrDup(jsargs[j])); |
| 257 | } |
| 258 | } |
| 259 | return args; |
| 260 | } |
| 261 | |
| 262 | |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 263 | inline char NormalizeChar(char ch) { |
| 264 | return ch == '_' ? '-' : ch; |
| 265 | } |
| 266 | |
| 267 | |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 268 | // Helper function to parse flags: Takes an argument arg and splits it into |
| 269 | // a flag name and flag value (or NULL if they are missing). is_bool is set |
| 270 | // if the arg started with "-no" or "--no". The buffer may be used to NUL- |
| 271 | // terminate the name, it must be large enough to hold any possible name. |
| 272 | static void SplitArgument(const char* arg, |
| 273 | char* buffer, |
| 274 | int buffer_size, |
| 275 | const char** name, |
| 276 | const char** value, |
| 277 | bool* is_bool) { |
| 278 | *name = NULL; |
| 279 | *value = NULL; |
| 280 | *is_bool = false; |
| 281 | |
Ben Murdoch | b0fe162 | 2011-05-05 13:52:32 +0100 | [diff] [blame] | 282 | if (arg != NULL && *arg == '-') { |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 283 | // find the begin of the flag name |
| 284 | arg++; // remove 1st '-' |
| 285 | if (*arg == '-') { |
| 286 | arg++; // remove 2nd '-' |
| 287 | if (arg[0] == '\0') { |
| 288 | const char* kJSArgumentsFlagName = "js_arguments"; |
| 289 | *name = kJSArgumentsFlagName; |
| 290 | return; |
| 291 | } |
| 292 | } |
| 293 | if (arg[0] == 'n' && arg[1] == 'o') { |
| 294 | arg += 2; // remove "no" |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 295 | if (NormalizeChar(arg[0]) == '-') arg++; // remove dash after "no". |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 296 | *is_bool = true; |
| 297 | } |
| 298 | *name = arg; |
| 299 | |
| 300 | // find the end of the flag name |
| 301 | while (*arg != '\0' && *arg != '=') |
| 302 | arg++; |
| 303 | |
| 304 | // get the value if any |
| 305 | if (*arg == '=') { |
| 306 | // make a copy so we can NUL-terminate flag name |
Steve Block | d0582a6 | 2009-12-15 09:54:21 +0000 | [diff] [blame] | 307 | size_t n = arg - *name; |
| 308 | CHECK(n < static_cast<size_t>(buffer_size)); // buffer is too small |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 309 | MemCopy(buffer, *name, n); |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 310 | buffer[n] = '\0'; |
| 311 | *name = buffer; |
| 312 | // get the value |
| 313 | *value = arg + 1; |
| 314 | } |
| 315 | } |
| 316 | } |
| 317 | |
| 318 | |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 319 | static bool EqualNames(const char* a, const char* b) { |
| 320 | for (int i = 0; NormalizeChar(a[i]) == NormalizeChar(b[i]); i++) { |
| 321 | if (a[i] == '\0') { |
| 322 | return true; |
| 323 | } |
| 324 | } |
| 325 | return false; |
| 326 | } |
| 327 | |
| 328 | |
| 329 | static Flag* FindFlag(const char* name) { |
| 330 | for (size_t i = 0; i < num_flags; ++i) { |
| 331 | if (EqualNames(name, flags[i].name())) |
| 332 | return &flags[i]; |
| 333 | } |
| 334 | return NULL; |
| 335 | } |
| 336 | |
| 337 | |
| 338 | // static |
| 339 | int FlagList::SetFlagsFromCommandLine(int* argc, |
| 340 | char** argv, |
| 341 | bool remove_flags) { |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 342 | int return_code = 0; |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 343 | // parse arguments |
| 344 | for (int i = 1; i < *argc;) { |
| 345 | int j = i; // j > 0 |
| 346 | const char* arg = argv[i++]; |
| 347 | |
| 348 | // split arg into flag components |
| 349 | char buffer[1*KB]; |
| 350 | const char* name; |
| 351 | const char* value; |
| 352 | bool is_bool; |
| 353 | SplitArgument(arg, buffer, sizeof buffer, &name, &value, &is_bool); |
| 354 | |
| 355 | if (name != NULL) { |
| 356 | // lookup the flag |
| 357 | Flag* flag = FindFlag(name); |
| 358 | if (flag == NULL) { |
| 359 | if (remove_flags) { |
| 360 | // We don't recognize this flag but since we're removing |
| 361 | // the flags we recognize we assume that the remaining flags |
| 362 | // will be processed somewhere else so this flag might make |
| 363 | // sense there. |
| 364 | continue; |
| 365 | } else { |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 366 | PrintF(stderr, "Error: unrecognized flag %s\n" |
| 367 | "Try --help for options\n", arg); |
| 368 | return_code = j; |
| 369 | break; |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 370 | } |
| 371 | } |
| 372 | |
| 373 | // if we still need a flag value, use the next argument if available |
| 374 | if (flag->type() != Flag::TYPE_BOOL && |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 375 | flag->type() != Flag::TYPE_MAYBE_BOOL && |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 376 | flag->type() != Flag::TYPE_ARGS && |
| 377 | value == NULL) { |
| 378 | if (i < *argc) { |
| 379 | value = argv[i++]; |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 380 | } |
| 381 | if (!value) { |
| 382 | PrintF(stderr, "Error: missing value for flag %s of type %s\n" |
| 383 | "Try --help for options\n", |
| 384 | arg, Type2String(flag->type())); |
| 385 | return_code = j; |
| 386 | break; |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 387 | } |
| 388 | } |
| 389 | |
| 390 | // set the flag |
| 391 | char* endp = const_cast<char*>(""); // *endp is only read |
| 392 | switch (flag->type()) { |
| 393 | case Flag::TYPE_BOOL: |
| 394 | *flag->bool_variable() = !is_bool; |
| 395 | break; |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 396 | case Flag::TYPE_MAYBE_BOOL: |
| 397 | *flag->maybe_bool_variable() = MaybeBoolFlag::Create(true, !is_bool); |
| 398 | break; |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 399 | case Flag::TYPE_INT: |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame] | 400 | *flag->int_variable() = static_cast<int>(strtol(value, &endp, 10)); |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 401 | break; |
| 402 | case Flag::TYPE_FLOAT: |
| 403 | *flag->float_variable() = strtod(value, &endp); |
| 404 | break; |
| 405 | case Flag::TYPE_STRING: |
| 406 | flag->set_string_value(value ? StrDup(value) : NULL, true); |
| 407 | break; |
| 408 | case Flag::TYPE_ARGS: { |
| 409 | int start_pos = (value == NULL) ? i : i - 1; |
| 410 | int js_argc = *argc - start_pos; |
| 411 | const char** js_argv = NewArray<const char*>(js_argc); |
| 412 | if (value != NULL) { |
| 413 | js_argv[0] = StrDup(value); |
| 414 | } |
| 415 | for (int k = i; k < *argc; k++) { |
| 416 | js_argv[k - start_pos] = StrDup(argv[k]); |
| 417 | } |
Ben Murdoch | 3ef787d | 2012-04-12 10:51:47 +0100 | [diff] [blame] | 418 | *flag->args_variable() = JSArguments::Create(js_argc, js_argv); |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 419 | i = *argc; // Consume all arguments |
| 420 | break; |
| 421 | } |
| 422 | } |
| 423 | |
| 424 | // handle errors |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 425 | bool is_bool_type = flag->type() == Flag::TYPE_BOOL || |
| 426 | flag->type() == Flag::TYPE_MAYBE_BOOL; |
| 427 | if ((is_bool_type && value != NULL) || (!is_bool_type && is_bool) || |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 428 | *endp != '\0') { |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 429 | PrintF(stderr, "Error: illegal value for flag %s of type %s\n" |
| 430 | "Try --help for options\n", |
| 431 | arg, Type2String(flag->type())); |
Ben Murdoch | 61f157c | 2016-09-16 13:49:30 +0100 | [diff] [blame] | 432 | if (is_bool_type) { |
| 433 | PrintF(stderr, |
| 434 | "To set or unset a boolean flag, use --flag or --no-flag.\n"); |
| 435 | } |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 436 | return_code = j; |
| 437 | break; |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 438 | } |
| 439 | |
| 440 | // remove the flag & value from the command |
| 441 | if (remove_flags) { |
| 442 | while (j < i) { |
| 443 | argv[j++] = NULL; |
| 444 | } |
| 445 | } |
| 446 | } |
| 447 | } |
| 448 | |
| 449 | // shrink the argument list |
| 450 | if (remove_flags) { |
| 451 | int j = 1; |
| 452 | for (int i = 1; i < *argc; i++) { |
| 453 | if (argv[i] != NULL) |
| 454 | argv[j++] = argv[i]; |
| 455 | } |
| 456 | *argc = j; |
| 457 | } |
| 458 | |
| 459 | if (FLAG_help) { |
| 460 | PrintHelp(); |
| 461 | exit(0); |
| 462 | } |
| 463 | // parsed all flags successfully |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 464 | return return_code; |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 465 | } |
| 466 | |
| 467 | |
| 468 | static char* SkipWhiteSpace(char* p) { |
| 469 | while (*p != '\0' && isspace(*p) != 0) p++; |
| 470 | return p; |
| 471 | } |
| 472 | |
| 473 | |
| 474 | static char* SkipBlackSpace(char* p) { |
| 475 | while (*p != '\0' && isspace(*p) == 0) p++; |
| 476 | return p; |
| 477 | } |
| 478 | |
| 479 | |
| 480 | // static |
| 481 | int FlagList::SetFlagsFromString(const char* str, int len) { |
| 482 | // make a 0-terminated copy of str |
Kristian Monsen | 25f6136 | 2010-05-21 11:50:48 +0100 | [diff] [blame] | 483 | ScopedVector<char> copy0(len + 1); |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 484 | MemCopy(copy0.start(), str, len); |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 485 | copy0[len] = '\0'; |
| 486 | |
| 487 | // strip leading white space |
Kristian Monsen | 25f6136 | 2010-05-21 11:50:48 +0100 | [diff] [blame] | 488 | char* copy = SkipWhiteSpace(copy0.start()); |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 489 | |
| 490 | // count the number of 'arguments' |
| 491 | int argc = 1; // be compatible with SetFlagsFromCommandLine() |
| 492 | for (char* p = copy; *p != '\0'; argc++) { |
| 493 | p = SkipBlackSpace(p); |
| 494 | p = SkipWhiteSpace(p); |
| 495 | } |
| 496 | |
| 497 | // allocate argument array |
Kristian Monsen | 25f6136 | 2010-05-21 11:50:48 +0100 | [diff] [blame] | 498 | ScopedVector<char*> argv(argc); |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 499 | |
| 500 | // split the flags string into arguments |
| 501 | argc = 1; // be compatible with SetFlagsFromCommandLine() |
| 502 | for (char* p = copy; *p != '\0'; argc++) { |
| 503 | argv[argc] = p; |
| 504 | p = SkipBlackSpace(p); |
| 505 | if (*p != '\0') *p++ = '\0'; // 0-terminate argument |
| 506 | p = SkipWhiteSpace(p); |
| 507 | } |
| 508 | |
| 509 | // set the flags |
Kristian Monsen | 25f6136 | 2010-05-21 11:50:48 +0100 | [diff] [blame] | 510 | int result = SetFlagsFromCommandLine(&argc, argv.start(), false); |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 511 | |
| 512 | return result; |
| 513 | } |
| 514 | |
| 515 | |
| 516 | // static |
| 517 | void FlagList::ResetAllFlags() { |
| 518 | for (size_t i = 0; i < num_flags; ++i) { |
| 519 | flags[i].Reset(); |
| 520 | } |
| 521 | } |
| 522 | |
| 523 | |
| 524 | // static |
| 525 | void FlagList::PrintHelp() { |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 526 | CpuFeatures::Probe(false); |
| 527 | CpuFeatures::PrintTarget(); |
| 528 | CpuFeatures::PrintFeatures(); |
| 529 | |
| 530 | OFStream os(stdout); |
| 531 | os << "Usage:\n" |
| 532 | << " shell [options] -e string\n" |
| 533 | << " execute string in V8\n" |
| 534 | << " shell [options] file1 file2 ... filek\n" |
| 535 | << " run JavaScript scripts in file1, file2, ..., filek\n" |
| 536 | << " shell [options]\n" |
| 537 | << " shell [options] --shell [file1 file2 ... filek]\n" |
| 538 | << " run an interactive JavaScript shell\n" |
| 539 | << " d8 [options] file1 file2 ... filek\n" |
| 540 | << " d8 [options]\n" |
| 541 | << " d8 [options] --shell [file1 file2 ... filek]\n" |
| 542 | << " run the new debugging shell\n\n" |
| 543 | << "Options:\n"; |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 544 | for (size_t i = 0; i < num_flags; ++i) { |
| 545 | Flag* f = &flags[i]; |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 546 | os << " --" << f->name() << " (" << f->comment() << ")\n" |
| 547 | << " type: " << Type2String(f->type()) << " default: " << *f |
| 548 | << "\n"; |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 549 | } |
| 550 | } |
| 551 | |
Ben Murdoch | c7cc028 | 2012-03-05 14:35:55 +0000 | [diff] [blame] | 552 | |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame] | 553 | static uint32_t flag_hash = 0; |
Ben Murdoch | 85b7179 | 2012-04-11 18:30:58 +0100 | [diff] [blame] | 554 | |
Emily Bernier | d0a1eb7 | 2015-03-24 16:35:39 -0400 | [diff] [blame] | 555 | |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame] | 556 | void ComputeFlagListHash() { |
Emily Bernier | d0a1eb7 | 2015-03-24 16:35:39 -0400 | [diff] [blame] | 557 | std::ostringstream modified_args_as_string; |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame] | 558 | #ifdef DEBUG |
| 559 | modified_args_as_string << "debug"; |
| 560 | #endif // DEBUG |
Emily Bernier | d0a1eb7 | 2015-03-24 16:35:39 -0400 | [diff] [blame] | 561 | for (size_t i = 0; i < num_flags; ++i) { |
| 562 | Flag* current = &flags[i]; |
| 563 | if (!current->IsDefault()) { |
| 564 | modified_args_as_string << i; |
| 565 | modified_args_as_string << *current; |
| 566 | } |
| 567 | } |
| 568 | std::string args(modified_args_as_string.str()); |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame] | 569 | flag_hash = static_cast<uint32_t>( |
Emily Bernier | d0a1eb7 | 2015-03-24 16:35:39 -0400 | [diff] [blame] | 570 | base::hash_range(args.c_str(), args.c_str() + args.length())); |
| 571 | } |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame] | 572 | |
| 573 | |
| 574 | // static |
| 575 | void FlagList::EnforceFlagImplications() { |
| 576 | #define FLAG_MODE_DEFINE_IMPLICATIONS |
| 577 | #include "src/flag-definitions.h" // NOLINT(build/include) |
| 578 | #undef FLAG_MODE_DEFINE_IMPLICATIONS |
| 579 | ComputeFlagListHash(); |
| 580 | } |
| 581 | |
| 582 | |
| 583 | uint32_t FlagList::Hash() { return flag_hash; } |
| 584 | } // namespace internal |
| 585 | } // namespace v8 |