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Implemented verification for aget-wide

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git-svn-id: https://smali.googlecode.com/svn/trunk@588 55b6fa8a-2a1e-11de-a435-ffa8d773f76a
This commit is contained in:
JesusFreke@JesusFreke.com 2010-01-25 00:36:52 +00:00
parent b239745290
commit c308b24b62
1 changed files with 57 additions and 0 deletions
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57
dexlib/src/main/java/org/jf/dexlib/Code/Analysis/MethodAnalyzer.java
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@ -510,6 +510,8 @@ public class MethodAnalyzer {
return handle32BitPrimitiveAget(analyzedInstruction, RegisterType.Category.Char);
case AGET_SHORT:
return handle32BitPrimitiveAget(analyzedInstruction, RegisterType.Category.Short);
case AGET_WIDE:
return handleAgetWide(analyzedInstruction);
}
assert false;
@ -1412,6 +1414,61 @@ public class MethodAnalyzer {
return true;
}
private boolean handleAgetWide(AnalyzedInstruction analyzedInstruction) {
ThreeRegisterInstruction instruction = (ThreeRegisterInstruction)analyzedInstruction.instruction;
RegisterType indexRegisterType = analyzedInstruction.getPreInstructionRegisterType(instruction.getRegisterC());
assert indexRegisterType != null;
if (indexRegisterType.category == RegisterType.Category.Unknown) {
return false;
}
checkRegister(indexRegisterType, Primitive32BitCategories);
RegisterType arrayRegisterType = analyzedInstruction.getPreInstructionRegisterType(instruction.getRegisterB());
assert arrayRegisterType != null;
if (indexRegisterType.category == RegisterType.Category.Unknown) {
return false;
}
if (arrayRegisterType.category != RegisterType.Category.Null) {
if (arrayRegisterType.category != RegisterType.Category.Reference) {
throw new ValidationException(String.format("Cannot use aget-wide with non-array type %s",
arrayRegisterType.category.toString()));
}
assert arrayRegisterType.type != null;
if (arrayRegisterType.type.getClassType().charAt(0) != '[') {
throw new ValidationException(String.format("Cannot use aget-wide with non-array type %s",
arrayRegisterType.type.getClassType()));
}
assert arrayRegisterType.type instanceof ClassPath.ArrayClassDef;
ClassPath.ArrayClassDef arrayClassDef = (ClassPath.ArrayClassDef)arrayRegisterType.type;
if (arrayClassDef.getArrayDimensions() != 1) {
throw new ValidationException(String.format("Cannot use aget-wide with multi-dimensional array type %s",
arrayRegisterType.type.getClassType()));
}
char arrayBaseType = arrayClassDef.getBaseElementClass().getClassType().charAt(0);
if (arrayBaseType == 'J') {
setWideDestinationRegisterTypeAndPropagateChanges(analyzedInstruction,
RegisterType.getRegisterType(RegisterType.Category.LongLo, null));
} else if (arrayBaseType == 'D') {
setWideDestinationRegisterTypeAndPropagateChanges(analyzedInstruction,
RegisterType.getRegisterType(RegisterType.Category.DoubleLo, null));
} else {
throw new ValidationException(String.format("Cannot use aget-wide with array type %s. Incorrect " +
"array type for the instruction.", arrayRegisterType.type.getClassType()));
}
} else {
setWideDestinationRegisterTypeAndPropagateChanges(analyzedInstruction,
RegisterType.getRegisterType(RegisterType.Category.LongLo, null));
}
return true;
}
private static boolean checkArrayFieldAssignment(RegisterType.Category arrayFieldCategory,
RegisterType.Category instructionCategory) {
if (arrayFieldCategory == instructionCategory) {