1 // Copyright 2006-2008 the V8 project authors. All rights reserved. 2 // Use of this source code is governed by a BSD-style license that can be 3 // found in the LICENSE file. 4 5 #ifndef V8_FLAGS_H_ 6 #define V8_FLAGS_H_ 7 8 #include "src/globals.h" 9 10 namespace v8 { 11 namespace internal { 12 13 // Declare all of our flags. 14 #define FLAG_MODE_DECLARE 15 #include "src/flag-definitions.h" // NOLINT 16 17 // The global list of all flags. 18 class FlagList { 19 public: 20 // The list of all flags with a value different from the default 21 // and their values. The format of the list is like the format of the 22 // argv array passed to the main function, e.g. 23 // ("--prof", "--log-file", "v8.prof", "--nolazy"). 24 // 25 // The caller is responsible for disposing the list, as well 26 // as every element of it. 27 static List<const char*>* argv(); 28 29 // Set the flag values by parsing the command line. If remove_flags is 30 // set, the flags and associated values are removed from (argc, 31 // argv). Returns 0 if no error occurred. Otherwise, returns the argv 32 // index > 0 for the argument where an error occurred. In that case, 33 // (argc, argv) will remain unchanged independent of the remove_flags 34 // value, and no assumptions about flag settings should be made. 35 // 36 // The following syntax for flags is accepted (both '-' and '--' are ok): 37 // 38 // --flag (bool flags only) 39 // --noflag (bool flags only) 40 // --flag=value (non-bool flags only, no spaces around '=') 41 // --flag value (non-bool flags only) 42 // -- (equivalent to --js_arguments, captures all remaining args) 43 static int SetFlagsFromCommandLine(int* argc, 44 char** argv, 45 bool remove_flags); 46 47 // Set the flag values by parsing the string str. Splits string into argc 48 // substrings argv[], each of which consisting of non-white-space chars, 49 // and then calls SetFlagsFromCommandLine() and returns its result. 50 static int SetFlagsFromString(const char* str, int len); 51 52 // Reset all flags to their default value. 53 static void ResetAllFlags(); 54 55 // Print help to stdout with flags, types, and default values. 56 static void PrintHelp(); 57 58 // Set flags as consequence of being implied by another flag. 59 static void EnforceFlagImplications(); 60 61 // Hash of flags (to quickly determine mismatching flag expectations). 62 // This hash is calculated during V8::Initialize and cached. 63 static uint32_t Hash(); 64 }; 65 66 } // namespace internal 67 } // namespace v8 68 69 #endif // V8_FLAGS_H_ 70
