Add ability to save and restore JSC options.
https://bugs.webkit.org/show_bug.cgi?id=148125
Reviewed by Saam Barati.
- API/tests/ExecutionTimeLimitTest.cpp:
(testExecutionTimeLimit):
- Employ the new options getter/setter to run watchdog tests for each of the
execution engine tiers.
- Also altered the test scripts to be in a function instead of global code.
This is one of 2 changes needed to give them an opportunity to be FTL compiled.
The other is to add support for compiling CheckWatchdogTimer in the FTL (which
will be addressed in a separate patch).
(CommandLine::parseArguments):
(JSC::parse):
- Add the ability to clear a string option with a nullptr value.
This is needed to restore a default string option value which may be null.
(JSC::OptionRange::init):
- Add the ability to clear a range option with a null value.
This is needed to restore a default range option value which may be null.
(JSC::Options::initialize):
(JSC::Options::dumpOptionsIfNeeded):
- Factor code to dump options out to dumpOptionsIfNeeded() since we will need
that logic elsewhere.
(JSC::Options::setOptions):
- Parse an options string and set each of the specified options.
(JSC::Options::dumpAllOptions):
(JSC::Options::dumpAllOptionsInALine):
(JSC::Options::dumpOption):
(JSC::Option::dump):
- Refactored so that the underlying dumper dumps to a StringBuilder instead of
stderr. This lets us reuse this code to serialize all the options into a
single string for dumpAllOptionsInALine().
(JSC::OptionRange::rangeString):
