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package scala.tools.nsc
package backend.jvm
package opt
import org.junit.Assert._
import org.junit.Test
import org.junit.runner.RunWith
import org.junit.runners.JUnit4
import scala.collection.JavaConverters._
import scala.tools.asm.tree.ClassNode
import scala.tools.nsc.backend.jvm.BTypes.{InlineInfo, MethodInlineInfo}
import scala.tools.testing.BytecodeTesting
@RunWith(classOf[JUnit4])
class ScalaInlineInfoTest extends BytecodeTesting {
override def compilerArgs = "-opt:l:none"
import compiler._
def inlineInfo(c: ClassNode): InlineInfo = c.attrs.asScala.collect({ case a: InlineInfoAttribute => a.inlineInfo }).head
def mapDiff[A, B](a: Map[A, B], b: Map[A, B]) = {
val r = new StringBuilder
for ((a, av) <- a) {
if (!b.contains(a)) r.append(s"missing in b: $a\n")
else if (av != b(a)) r.append(s"different for $a: $av != ${b(a)}\n")
}
for (b <- b.keys.toList diff a.keys.toList) {
r.append(s"missing in a: $b\n")
}
r.toString
}
def assertSameMethods(c: ClassNode, nameAndSigs: Set[String]): Unit = {
val r = new StringBuilder
val inClass = c.methods.iterator.asScala.map(m => m.name + m.desc).toSet
for (m <- inClass.diff(nameAndSigs)) r.append(s"method in classfile found, but no inline info: $m")
for (m <- nameAndSigs.diff(inClass)) r.append(s"inline info found, but no method in classfile: $m")
assert(r.isEmpty, r.toString)
}
@Test
def traitMembersInlineInfo(): Unit = {
val code =
"""trait T {
| def f1 = 1 // concrete method
| private def f2 = 1 // default method only (not in subclass)
| def f3 = {
| def nest = 0 // nested method (does not end up in the interface)
| nest
| }
|
| @inline
| def f4 = super.toString // super accessor
|
| object O // module accessor (method is generated)
| final def f5 = {
| object L { val x = 0 } // nested module (just flattened out)
| L.x
| }
|
| @noinline
| def f6: Int // abstract method
|
| // fields
|
| val x1 = 0
| var y2 = 0
| var x3: Int
| lazy val x4 = 0
|
| final val x5 = 0
|}
|class C extends T {
| def f6 = 0
| var x3 = 0
|}
""".stripMargin
val cs @ List(c, t, tl, to) = compileClasses(code)
val infoT = inlineInfo(t)
val expectT = InlineInfo (
false, // final class
None, // not a sam
Map(
("O()LT$O$;", MethodInlineInfo(false,false,false)),
("T$$super$toString()Ljava/lang/String;", MethodInlineInfo(true ,false,false)),
("T$_setter_$x1_$eq(I)V", MethodInlineInfo(false,false,false)),
("f1()I", MethodInlineInfo(false,false,false)),
("f1$(LT;)I", MethodInlineInfo(true ,false,false)),
("f2()I", MethodInlineInfo(true ,false,false)), // no static impl method for private method f2
("f3()I", MethodInlineInfo(false,false,false)),
("f3$(LT;)I", MethodInlineInfo(true ,false,false)),
("f4()Ljava/lang/String;", MethodInlineInfo(false,true, false)),
("f4$(LT;)Ljava/lang/String;", MethodInlineInfo(true ,true, false)),
("f5()I", MethodInlineInfo(true ,false,false)),
("f5$(LT;)I", MethodInlineInfo(true ,false,false)),
("f6()I", MethodInlineInfo(false,false,true )), // no static impl method for abstract method f6
("x1()I", MethodInlineInfo(false,false,false)),
("y2()I", MethodInlineInfo(false,false,false)),
("y2_$eq(I)V", MethodInlineInfo(false,false,false)),
("x3()I", MethodInlineInfo(false,false,false)),
("x3_$eq(I)V", MethodInlineInfo(false,false,false)),
("x4()I", MethodInlineInfo(false,false,false)),
("x4$(LT;)I", MethodInlineInfo(true ,false,false)),
("x5()I", MethodInlineInfo(true, false,false)),
("x5$(LT;)I", MethodInlineInfo(true ,false,false)),
("L$1(Lscala/runtime/LazyRef;)LT$L$2$;", MethodInlineInfo(true, false,false)),
("nest$1()I", MethodInlineInfo(true, false,false)),
("$init$(LT;)V", MethodInlineInfo(true,false,false)),
("L$lzycompute$1(Lscala/runtime/LazyRef;)LT$L$2$;", MethodInlineInfo(true,false,false))
),
None // warning
)
assert(infoT == expectT, mapDiff(expectT.methodInfos, infoT.methodInfos) + infoT)
assertSameMethods(t, expectT.methodInfos.keySet)
val infoC = inlineInfo(c)
val expectC = InlineInfo(false, None, Map(
"O()LT$O$;" -> MethodInlineInfo(true ,false,false),
"f1()I" -> MethodInlineInfo(false,false,false),
"f3()I" -> MethodInlineInfo(false,false,false),
"f4()Ljava/lang/String;" -> MethodInlineInfo(false,true,false),
"f5()I" -> MethodInlineInfo(true,false,false),
"f6()I" -> MethodInlineInfo(false,false,false),
"x1()I" -> MethodInlineInfo(false,false,false),
"T$_setter_$x1_$eq(I)V" -> MethodInlineInfo(false,false,false),
"y2()I" -> MethodInlineInfo(false,false,false),
"y2_$eq(I)V" -> MethodInlineInfo(false,false,false),
"x3()I" -> MethodInlineInfo(false,false,false),
"x3_$eq(I)V" -> MethodInlineInfo(false,false,false),
"x4$lzycompute()I" -> MethodInlineInfo(true ,false,false),
"x4()I" -> MethodInlineInfo(false,false,false),
"T$$super$toString()Ljava/lang/String;" -> MethodInlineInfo(true ,false,false),
"<init>()V" -> MethodInlineInfo(false,false,false),
"O$lzycompute$1()V" -> MethodInlineInfo(true,false,false)
),
None)
assert(infoC == expectC, mapDiff(expectC.methodInfos, infoC.methodInfos) + infoC)
assertSameMethods(c, expectC.methodInfos.keySet)
}
@Test
def inlineInfoSam(): Unit = {
val code =
"""trait C { // expected to be seen as sam: g(I)I
| def f = 0
| def g(x: Int): Int
| val foo = "hi"
|}
|abstract class D {
| val biz: Int
|}
|trait T { // expected to be seen as sam: h(Ljava/lang/String;)I
| def h(a: String): Int
|}
|trait E extends T { // expected to be seen as sam: h(Ljava/lang/String;)I
| def hihi(x: Int) = x
|}
|class F extends T {
| def h(a: String) = 0
|}
|trait U {
| def conc() = 10
| def nullary: Int
|}
""".stripMargin
val cs = compileClasses(code)
val sams = cs.map(c => (c.name, inlineInfo(c).sam))
assertEquals(sams,
List(
("C",Some("g(I)I")),
("D",None),
("E",Some("h(Ljava/lang/String;)I")),
("F",None),
("T",Some("h(Ljava/lang/String;)I")),
("U",None)))
}
@Test
def lzyComputeInlineInfo(): Unit = {
val code = "class C { object O }"
val List(c, om) = compileClasses(code)
val infoC = inlineInfo(c)
val expected = Map(
"<init>()V" -> MethodInlineInfo(false,false,false),
"O$lzycompute$1()V" -> MethodInlineInfo(true,false,false),
"O()LC$O$;" -> MethodInlineInfo(true,false,false))
assert(infoC.methodInfos == expected, mapDiff(infoC.methodInfos, expected))
assertSameMethods(c, expected.keySet)
}
}
|
