/**
* Compares the instrumentation level interval against the runtime value.
*
* <p>If the runtime value is fitting the level interval there will be 0 on stack upon return from
* this method. Otherwise there will be -1.
*
* @param clsName The probe class name
* @param level The probe instrumentation level
* @return itself
*/
public Assembler compareLevel(String clsName, Level level) {
Interval itv = level.getValue();
if (itv.getA() <= 0) {
if (itv.getB() != Integer.MAX_VALUE) {
ldc(itv.getB());
getStatic(clsName, "$btrace$$level", Type.INT_TYPE.getDescriptor());
sub(Type.INT_TYPE);
}
} else if (itv.getA() < itv.getB()) {
if (itv.getB() == Integer.MAX_VALUE) {
getStatic(clsName, "$btrace$$level", Type.INT_TYPE.getDescriptor());
ldc(itv.getA());
sub(Type.INT_TYPE);
} else {
Label l1 = new Label();
Label l2 = new Label();
ldc(itv.getA());
jump(Opcodes.IF_ICMPLT, l1);
getStatic(clsName, "$btrace$$level", Type.INT_TYPE.getDescriptor());
ldc(itv.getB());
jump(Opcodes.IF_ICMPGT, l1);
ldc(0);
jump(Opcodes.GOTO, l2);
label(l1);
ldc(-1);
label(l2);
}
}
return this;
}
public Assembler addLevelCheck(String clsName, Interval itv, Label jmp) {
getStatic(clsName, "$btrace$$level", Type.INT_TYPE.getDescriptor());
if (itv.getA() <= 0) {
if (itv.getB() != Integer.MAX_VALUE) {
ldc(itv.getB());
jump(Opcodes.IF_ICMPGT, jmp);
}
} else if (itv.getA() < itv.getB()) {
if (itv.getB() == Integer.MAX_VALUE) {
ldc(itv.getA());
jump(Opcodes.IF_ICMPLT, jmp);
} else {
ldc(itv.getA());
jump(Opcodes.IF_ICMPLT, jmp);
getStatic(clsName, "$btrace$$level", Type.INT_TYPE.getDescriptor());
ldc(itv.getB());
jump(Opcodes.IF_ICMPGT, jmp);
}
}
return this;
}