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/*
* Copyright (C) 2011-2020 Apple Inc. All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
*
* THIS SOFTWARE IS PROVIDED BY APPLE INC. ``AS IS'' AND ANY
* EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
* PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL APPLE INC. OR
* CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
* EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
* PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
* PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY
* OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*/
#pragma once
#include "JSCConfig.h"
#include "JSExportMacros.h"
#include <stdint.h>
#include <stdio.h>
#include <wtf/ForbidHeapAllocation.h>
#include <wtf/Noncopyable.h>
#include <wtf/PrintStream.h>
#include <wtf/StdLibExtras.h>
namespace WTF {
class StringBuilder;
}
using WTF::StringBuilder;
namespace JSC {
class Options {
public:
enum class DumpLevel : uint8_t {
None = 0,
Overridden,
All,
Verbose
};
enum class Availability : uint8_t {
Normal = 0,
Restricted,
Configurable
};
#define DECLARE_OPTION_ID(type_, name_, defaultValue_, availability_, description_) \
name_##ID,
enum ID : uint16_t {
FOR_EACH_JSC_OPTION(DECLARE_OPTION_ID)
};
#undef DECLARE_OPTION_ID
enum class Type : uint8_t {
Bool,
Unsigned,
Double,
Int32,
Size,
OptionRange,
OptionString,
GCLogLevel,
};
class AllowUnfinalizedAccessScope {
WTF_MAKE_NONCOPYABLE(AllowUnfinalizedAccessScope);
WTF_FORBID_HEAP_ALLOCATION;
public:
#if ASSERT_ENABLED
AllowUnfinalizedAccessScope()
{
if (!g_jscConfig.options.isFinalized) {
m_savedAllowUnfinalizedUse = g_jscConfig.options.allowUnfinalizedAccess;
g_jscConfig.options.allowUnfinalizedAccess = true;
}
}
~AllowUnfinalizedAccessScope()
{
if (!g_jscConfig.options.isFinalized)
g_jscConfig.options.allowUnfinalizedAccess = m_savedAllowUnfinalizedUse;
}
private:
bool m_savedAllowUnfinalizedUse;
#else
ALWAYS_INLINE AllowUnfinalizedAccessScope() = default;
ALWAYS_INLINE ~AllowUnfinalizedAccessScope() { }
#endif
};
JS_EXPORT_PRIVATE static void initialize();
static void finalize();
// Parses a string of options where each option is of the format "--<optionName>=<value>"
// and are separated by a space. The leading "--" is optional and will be ignored.
JS_EXPORT_PRIVATE static bool setOptions(const char* optionsList);
// Parses a single command line option in the format "<optionName>=<value>"
// (no spaces allowed) and set the specified option if appropriate.
JS_EXPORT_PRIVATE static bool setOption(const char* arg);
JS_EXPORT_PRIVATE static void dumpAllOptions(FILE*, DumpLevel, const char* title = nullptr);
JS_EXPORT_PRIVATE static void dumpAllOptionsInALine(StringBuilder&);
JS_EXPORT_PRIVATE static void ensureOptionsAreCoherent();
static void recomputeDependentOptions();
#define DECLARE_OPTION_ACCESSORS(type_, name_, defaultValue_, availability_, description_) \
private: \
ALWAYS_INLINE static OptionsStorage::type_& name_##Default() { return g_jscConfig.options.name_##Default; } \
public: \
ALWAYS_INLINE static OptionsStorage::type_& name_() \
{ \
ASSERT(g_jscConfig.options.allowUnfinalizedAccess || g_jscConfig.options.isFinalized); \
return g_jscConfig.options.name_; \
}
FOR_EACH_JSC_OPTION(DECLARE_OPTION_ACCESSORS)
#undef DECLARE_OPTION_ACCESSORS
static bool isAvailable(ID, Availability);
private:
struct ConstMetaData {
const char* name;
const char* description;
Type type;
Availability availability;
uint16_t offsetOfOption;
uint16_t offsetOfOptionDefault;
};
Options();
enum DumpDefaultsOption {
DontDumpDefaults,
DumpDefaults
};
static void dumpOptionsIfNeeded();
static void dumpAllOptions(StringBuilder&, DumpLevel, const char* title,
const char* separator, const char* optionHeader, const char* optionFooter, DumpDefaultsOption);
static void dumpOption(StringBuilder&, DumpLevel, ID,
const char* optionHeader, const char* optionFooter, DumpDefaultsOption);
static bool setOptionWithoutAlias(const char* arg);
static bool setAliasedOption(const char* arg);
static bool overrideAliasedOptionWithHeuristic(const char* name);
inline static void* addressOfOption(Options::ID);
inline static void* addressOfOptionDefault(Options::ID);
static const ConstMetaData s_constMetaData[NumberOfOptions];
friend struct OptionReader;
};
} // namespace JSC
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