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Unit test for iterative goto embiggening and consequent payload re-alignment.

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This commit is contained in:
Izzat Bahadirov 2013-03-25 19:06:07 -04:00
parent dae24249f1
commit 3d721348c5
1 changed files with 31 additions and 0 deletions
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31
dexlib2/src/test/java/org/jf/dexlib2/writer/JumboStringConversionTest.java
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@ -384,4 +384,35 @@ public class JumboStringConversionTest {
Assert.assertEquals("goto/16 was not converted to goto/32 properly", instr.getOpcode(), Opcode.GOTO_32);
}
@Test
public void testGotoIterative() {
ArrayList<ImmutableInstruction> instructions = Lists.newArrayList();
instructions.add(new ImmutableInstruction10t(Opcode.GOTO, 126));
instructions.add(new ImmutableInstruction10t(Opcode.GOTO, 127));
instructions.add(new ImmutableInstruction21c(Opcode.CONST_STRING, 0, new ImmutableStringReference(mJumboStrings.get(0))));
for (int i=0;i<122;i++) {
instructions.add(new ImmutableInstruction10x(Opcode.NOP));
}
instructions.add(new ImmutableInstruction21c(Opcode.CONST_STRING, 0, new ImmutableStringReference(mJumboStrings.get(1))));
instructions.add(new ImmutableInstruction10x(Opcode.NOP));
// this misaligned array payload will cause nop insertion on the first pass and its removal on the second pass
instructions.add(new ImmutableInstruction10x(Opcode.NOP));
instructions.add(new ImmutableArrayPayload(4, null));
ImmutableMethodImplementation methodImplementation = new ImmutableMethodImplementation(1, instructions, null, null);
InstructionWriteUtil writeUtil = new InstructionWriteUtil(methodImplementation, mStringPool);
Instruction instr = writeUtil.getInstructions().iterator().next();
Assert.assertEquals("goto was not converted to goto/16 properly", instr.getOpcode(), Opcode.GOTO_16);
int codeOffset = 0;
for (Instruction instruction: writeUtil.getInstructions()) {
if (instruction instanceof ArrayPayload) {
Assert.assertEquals("packed switch payload was not aligned properly", codeOffset%2, 0);
}
codeOffset += instruction.getCodeUnits();
}
}
}