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Reject bytecode manipulating with uninitialized values on stack

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NB this will break parcel-related tests in android-extensions compiler
plugin
This commit is contained in:
Dmitry Petrov
2017-10-02 16:41:26 +03:00
parent 3405ae30a1
commit 533c1d2541
1 changed files with 14 additions and 2 deletions
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compiler/backend/src/org/jetbrains/kotlin/codegen/coroutines/processUninitializedStores.kt
+14 -2
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@@ -16,6 +16,7 @@
package org.jetbrains.kotlin.codegen.coroutines
import org.jetbrains.kotlin.codegen.inline.insnText
import org.jetbrains.kotlin.codegen.optimization.common.*
import org.jetbrains.kotlin.codegen.optimization.fixStack.peek
import org.jetbrains.org.objectweb.asm.Opcodes
@@ -76,7 +77,7 @@ class UninitializedStoresProcessor(private val methodNode: MethodNode, private v
private val isInSpecialMethod = methodNode.name == "<init>" || methodNode.name == "<clinit>"
fun run() {
val interpreter = UninitializedNewValueMarkerInterpreter()
val interpreter = UninitializedNewValueMarkerInterpreter(methodNode.instructions)
val frames = CustomFramesMethodAnalyzer(
"fake", methodNode, interpreter,
@@ -190,7 +191,7 @@ class UninitializedStoresProcessor(private val methodNode: MethodNode, private v
private fun AbstractInsnNode.isConstructorCall() = this is MethodInsnNode && this.name == "<init>"
private class UninitializedNewValueMarkerInterpreter : OptimizationBasicInterpreter() {
private class UninitializedNewValueMarkerInterpreter(private val instructions: InsnList) : OptimizationBasicInterpreter() {
val uninitializedValuesToCopyUsages = hashMapOf<AbstractInsnNode, MutableSet<AbstractInsnNode>>()
override fun newOperation(insn: AbstractInsnNode): BasicValue? {
if (insn.opcode == Opcodes.NEW) {
@@ -202,6 +203,7 @@ class UninitializedStoresProcessor(private val methodNode: MethodNode, private v
override fun copyOperation(insn: AbstractInsnNode, value: BasicValue?): BasicValue? {
if (value is UninitializedNewValue) {
checkUninitializedObjectCopy(value.newInsn, insn)
uninitializedValuesToCopyUsages[value.newInsn]!!.add(insn)
return value
}
@@ -225,5 +227,15 @@ class UninitializedStoresProcessor(private val methodNode: MethodNode, private v
return super.merge(v, w)
}
private fun checkUninitializedObjectCopy(newInsn: TypeInsnNode, usageInsn: AbstractInsnNode) {
when (usageInsn.opcode) {
Opcodes.DUP, Opcodes.ASTORE, Opcodes.ALOAD -> {}
else -> error("Unexpected copy instruction for ${newInsn.debugText}: ${usageInsn.debugText}")
}
}
private val AbstractInsnNode.debugText
get() = "${instructions.indexOf(this)}: $insnText"
}
}