#ifndef CommonSlowPaths_h
#define CommonSlowPaths_h
#include "CodeBlock.h"
#include "CodeSpecializationKind.h"
#include "ExceptionHelpers.h"
#include "JSStackInlines.h"
#include "StackAlignment.h"
#include "Symbol.h"
#include "VM.h"
#include <wtf/StdLibExtras.h>
namespace JSC {
namespace CommonSlowPaths {
struct ArityCheckData {
unsigned paddedStackSpace;
void* thunkToCall;
void* returnPC;
};
ALWAYS_INLINE int arityCheckFor(ExecState* exec, JSStack* stack, CodeSpecializationKind kind)
{
JSFunction* callee = jsCast<JSFunction*>(exec->callee());
ASSERT(!callee->isHostFunction());
CodeBlock* newCodeBlock = callee->jsExecutable()->codeBlockFor(kind);
int argumentCountIncludingThis = exec->argumentCountIncludingThis();
ASSERT(argumentCountIncludingThis < newCodeBlock->numParameters());
int missingArgumentCount = newCodeBlock->numParameters() - argumentCountIncludingThis;
int neededStackSpace = missingArgumentCount + 1; int paddedStackSpace = WTF::roundUpToMultipleOf(stackAlignmentRegisters(), neededStackSpace);
if (!stack->ensureCapacityFor(exec->registers() - paddedStackSpace))
return -1;
return paddedStackSpace / stackAlignmentRegisters();
}
inline bool opIn(ExecState* exec, JSValue propName, JSValue baseVal)
{
if (!baseVal.isObject()) {
exec->vm().throwException(exec, createInvalidInParameterError(exec, baseVal));
return false;
}
JSObject* baseObj = asObject(baseVal);
uint32_t i;
if (propName.getUInt32(i))
return baseObj->hasProperty(exec, i);
auto property = propName.toPropertyKey(exec);
if (exec->vm().exception())
return false;
return baseObj->hasProperty(exec, property);
}
inline void tryCachePutToScopeGlobal(
ExecState* exec, CodeBlock* codeBlock, Instruction* pc, JSObject* scope,
ResolveModeAndType modeAndType, PutPropertySlot& slot)
{
if (modeAndType.type() != GlobalProperty && modeAndType.type() != GlobalPropertyWithVarInjectionChecks)
return;
if (!slot.isCacheablePut()
|| slot.base() != scope
|| !scope->structure()->propertyAccessesAreCacheable())
return;
if (slot.type() == PutPropertySlot::NewProperty) {
return;
}
scope->structure()->didCachePropertyReplacement(exec->vm(), slot.cachedOffset());
ConcurrentJITLocker locker(codeBlock->m_lock);
pc[5].u.structure.set(exec->vm(), codeBlock->ownerExecutable(), scope->structure());
pc[6].u.operand = slot.cachedOffset();
}
}
class ExecState;
struct Instruction;
#if USE(JSVALUE64)
struct SlowPathReturnType {
void* a;
void* b;
};
inline SlowPathReturnType encodeResult(void* a, void* b)
{
SlowPathReturnType result;
result.a = a;
result.b = b;
return result;
}
inline void decodeResult(SlowPathReturnType result, void*& a, void*& b)
{
a = result.a;
b = result.b;
}
#else // USE(JSVALUE32_64)
typedef int64_t SlowPathReturnType;
typedef union {
struct {
void* a;
void* b;
} pair;
int64_t i;
} SlowPathReturnTypeEncoding;
inline SlowPathReturnType encodeResult(void* a, void* b)
{
SlowPathReturnTypeEncoding u;
u.pair.a = a;
u.pair.b = b;
return u.i;
}
inline void decodeResult(SlowPathReturnType result, void*& a, void*& b)
{
SlowPathReturnTypeEncoding u;
u.i = result;
a = u.pair.a;
b = u.pair.b;
}
#endif // USE(JSVALUE32_64)
#define SLOW_PATH
#define SLOW_PATH_DECL(name) \
extern "C" SlowPathReturnType SLOW_PATH name(ExecState* exec, Instruction* pc)
#define SLOW_PATH_HIDDEN_DECL(name) \
SLOW_PATH_DECL(name) WTF_INTERNAL
SLOW_PATH_HIDDEN_DECL(slow_path_call_arityCheck);
SLOW_PATH_HIDDEN_DECL(slow_path_construct_arityCheck);
SLOW_PATH_HIDDEN_DECL(slow_path_create_direct_arguments);
SLOW_PATH_HIDDEN_DECL(slow_path_create_scoped_arguments);
SLOW_PATH_HIDDEN_DECL(slow_path_create_out_of_band_arguments);
SLOW_PATH_HIDDEN_DECL(slow_path_create_this);
SLOW_PATH_HIDDEN_DECL(slow_path_enter);
SLOW_PATH_HIDDEN_DECL(slow_path_get_callee);
SLOW_PATH_HIDDEN_DECL(slow_path_to_this);
SLOW_PATH_HIDDEN_DECL(slow_path_throw_tdz_error);
SLOW_PATH_HIDDEN_DECL(slow_path_not);
SLOW_PATH_HIDDEN_DECL(slow_path_eq);
SLOW_PATH_HIDDEN_DECL(slow_path_neq);
SLOW_PATH_HIDDEN_DECL(slow_path_stricteq);
SLOW_PATH_HIDDEN_DECL(slow_path_nstricteq);
SLOW_PATH_HIDDEN_DECL(slow_path_less);
SLOW_PATH_HIDDEN_DECL(slow_path_lesseq);
SLOW_PATH_HIDDEN_DECL(slow_path_greater);
SLOW_PATH_HIDDEN_DECL(slow_path_greatereq);
SLOW_PATH_HIDDEN_DECL(slow_path_inc);
SLOW_PATH_HIDDEN_DECL(slow_path_dec);
SLOW_PATH_HIDDEN_DECL(slow_path_to_number);
SLOW_PATH_HIDDEN_DECL(slow_path_to_string);
SLOW_PATH_HIDDEN_DECL(slow_path_negate);
SLOW_PATH_HIDDEN_DECL(slow_path_add);
SLOW_PATH_HIDDEN_DECL(slow_path_mul);
SLOW_PATH_HIDDEN_DECL(slow_path_sub);
SLOW_PATH_HIDDEN_DECL(slow_path_div);
SLOW_PATH_HIDDEN_DECL(slow_path_mod);
SLOW_PATH_HIDDEN_DECL(slow_path_lshift);
SLOW_PATH_HIDDEN_DECL(slow_path_rshift);
SLOW_PATH_HIDDEN_DECL(slow_path_urshift);
SLOW_PATH_HIDDEN_DECL(slow_path_unsigned);
SLOW_PATH_HIDDEN_DECL(slow_path_bitand);
SLOW_PATH_HIDDEN_DECL(slow_path_bitor);
SLOW_PATH_HIDDEN_DECL(slow_path_bitxor);
SLOW_PATH_HIDDEN_DECL(slow_path_typeof);
SLOW_PATH_HIDDEN_DECL(slow_path_is_object);
SLOW_PATH_HIDDEN_DECL(slow_path_is_object_or_null);
SLOW_PATH_HIDDEN_DECL(slow_path_is_function);
SLOW_PATH_HIDDEN_DECL(slow_path_in);
SLOW_PATH_HIDDEN_DECL(slow_path_del_by_val);
SLOW_PATH_HIDDEN_DECL(slow_path_strcat);
SLOW_PATH_HIDDEN_DECL(slow_path_to_primitive);
SLOW_PATH_HIDDEN_DECL(slow_path_get_enumerable_length);
SLOW_PATH_HIDDEN_DECL(slow_path_has_generic_property);
SLOW_PATH_HIDDEN_DECL(slow_path_has_structure_property);
SLOW_PATH_HIDDEN_DECL(slow_path_has_indexed_property);
SLOW_PATH_HIDDEN_DECL(slow_path_get_direct_pname);
SLOW_PATH_HIDDEN_DECL(slow_path_get_property_enumerator);
SLOW_PATH_HIDDEN_DECL(slow_path_next_structure_enumerator_pname);
SLOW_PATH_HIDDEN_DECL(slow_path_next_generic_enumerator_pname);
SLOW_PATH_HIDDEN_DECL(slow_path_to_index_string);
SLOW_PATH_HIDDEN_DECL(slow_path_profile_type_clear_log);
}
#endif // CommonSlowPaths_h