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/*
* Hard-coded IR for java.lang.Object.
*/
import scala.scalajs.ir
import ir._
import ir.Definitions._
import ir.Infos._
import ir.Trees._
import ir.Types._
import ir.Position.NoPosition
/** Hard-coded IR for java.lang.Object.
* We cannot so much as begin to fake a compilation of java.lang.Object,
* because Object is hijacked so much by scalac itself that it does not like
* at all to try to compile that class. So we have to bypass entirely the
* compiler to define java.lang.Object.
*/
object JavaLangObject {
/** Optimizer hints with `@inline`
* Unfortunately we do not have access to private details of
* [[OptimizerHints]], so we cannot do this cleanly. But it is fine
* somehow because we're part of the same project implementation.
*/
private def inlineOptimizerHints = new OptimizerHints(2)
val InfoAndTree = (Info, Definition)
private def Info = ClassInfo(
name = "java.lang.Object",
encodedName = "O",
ancestorCount = 0,
kind = ClassKind.Class,
superClass = "",
ancestors = List("O"),
methods = List(
MethodInfo("__init__"),
MethodInfo("init___"),
MethodInfo("hashCode__I",
calledMethods = Map(
"jl_System$" -> List("identityHashCode__O__I")
),
accessedModules = List("jl_System")
),
MethodInfo("equals__O__Z",
optimizerHints = inlineOptimizerHints
),
MethodInfo("clone__O",
calledMethods = Map(
"sjsr_package$" -> List("cloneObject__sjs_js_Object__sjs_js_Object"),
"jl_CloneNotSupportedException" -> List("init___")
),
instantiatedClasses = List("jl_CloneNotSupportedException"),
accessedModules = List("sjsr_package"),
accessedClassData = List("jl_Cloneable"),
optimizerHints = inlineOptimizerHints
),
MethodInfo("notify__V"),
MethodInfo("notifyAll__V"),
MethodInfo("toString__T",
calledMethods = Map(
"O" -> List("hashCode__I"),
"jl_Class" -> List("getName__T"),
"jl_Integer$" -> List("toHexString__I__T")
),
accessedModules = List("jl_Integer")
),
MethodInfo("finalize__V"),
MethodInfo("clone__",
calledMethods = Map(
"O" -> List("clone__O")
)
),
MethodInfo("notify__",
calledMethods = Map(
"O" -> List("notify__V")
)
),
MethodInfo("notifyAll__",
calledMethods = Map(
"O" -> List("notifyAll__V")
)
),
MethodInfo("finalize__",
calledMethods = Map(
"O" -> List("finalize__V")
)
)
)
)
private def Definition = {
implicit val DummyPos = NoPosition
// ClassType(Object) is normally invalid, but not in this class def
val ThisType = ClassType(ObjectClass)
val classDef = ClassDef(
Ident("O", Some("java.lang.Object")),
ClassKind.Class,
None,
Nil,
List(
/* def this() = () */
MethodDef(
Ident("init___", Some("<init>")),
Nil,
AnyType,
This()(ThisType))(None),
/* def hashCode(): Int = System.identityHashCode(this) */
MethodDef(
Ident("hashCode__I", Some("hashCode__I")),
Nil,
IntType,
{
Apply(
LoadModule(ClassType("jl_System$")),
Ident("identityHashCode__O__I", Some("identityHashCode")),
List(This()(ThisType)))(IntType)
})(None),
/* def equals(that: Object): Boolean = this eq that */
MethodDef(
Ident("equals__O__Z", Some("equals__O__Z")),
List(ParamDef(Ident("that", Some("that")), AnyType, mutable = false)),
BooleanType,
{
BinaryOp(BinaryOp.===,
This()(ThisType),
VarRef(Ident("that", Some("that")), mutable = false)(AnyType))
})(None),
/* protected def clone(): Object =
* if (this.isInstanceOf[Cloneable]) <clone>(this)
* else throw new CloneNotSupportedException()
*/
MethodDef(
Ident("clone__O", Some("clone__O")),
Nil,
AnyType,
{
If(IsInstanceOf(This()(ThisType), ClassType("jl_Cloneable")), {
Apply(LoadModule(ClassType("sjsr_package$")),
Ident("cloneObject__sjs_js_Object__sjs_js_Object", Some("cloneObject")),
List(This()(ThisType)))(AnyType)
}, {
Throw(New(ClassType("jl_CloneNotSupportedException"),
Ident("init___", Some("<init>")), Nil))
})(AnyType)
})(None),
/* def toString(): String =
* getClass().getName() + "@" + Integer.toHexString(hashCode())
*/
MethodDef(
Ident("toString__T", Some("toString__T")),
Nil,
ClassType(StringClass),
{
BinaryOp(BinaryOp.String_+, BinaryOp(BinaryOp.String_+,
Apply(
GetClass(This()(ThisType)),
Ident("getName__T"), Nil)(ClassType(StringClass)),
// +
StringLiteral("@")),
// +
Apply(
LoadModule(ClassType("jl_Integer$")),
Ident("toHexString__I__T"),
List(Apply(This()(ThisType), Ident("hashCode__I"), Nil)(IntType)))(
ClassType(StringClass)))
})(None),
/* Since wait() is not supported in any way, a correct implementation
* of notify() and notifyAll() is to do nothing.
*/
/* def notify(): Unit = () */
MethodDef(
Ident("notify__V", Some("notify__V")),
Nil,
NoType,
Skip())(None),
/* def notifyAll(): Unit = () */
MethodDef(
Ident("notifyAll__V", Some("notifyAll__V")),
Nil,
NoType,
Skip())(None),
/* def finalize(): Unit = () */
MethodDef(
Ident("finalize__V", Some("finalize__V")),
Nil,
NoType,
Skip())(None),
/* Reflective proxies
* Note that we do not need to proxy the following methods, since
* they are defined on Any in the Scala hierarchy and therefore a
* reflective call is never emitted:
* - equals
* - getClass
* - hashCode
* - toString
*/
MethodDef(Ident("clone__"), Nil, AnyType,
Apply(This()(ThisType), Ident("clone__O"), Nil)(AnyType))(None),
MethodDef(Ident("notify__"), Nil, AnyType, Block(
Apply(This()(ThisType), Ident("notify__V"), Nil)(NoType),
Undefined()))(None),
MethodDef(Ident("notifyAll__"), Nil, AnyType, Block(
Apply(This()(ThisType), Ident("notifyAll__V"), Nil)(NoType),
Undefined()))(None),
MethodDef(Ident("finalize__"), Nil, AnyType, Block(
Apply(This()(ThisType), Ident("finalize__V"), Nil)(NoType),
Undefined()))(None),
// Exports
/* JSExport for toString(). */
MethodDef(
StringLiteral("toString"),
Nil,
AnyType,
{
Apply(This()(ThisType),
Ident("toString__T", Some("toString__T")),
Nil)(ClassType(StringClass))
})(None)
))
Hashers.hashClassDef(classDef)
}
}
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