Re: Popping from operand stack

Running the command iload_1 will put on the stack that integer, iload_2 wil=
l do the same for the other integer. However where you choose to save them =
affects massively what you do next! You might want to explain where you wan=
t to store them and how.=0A=0AWriting out the code yourself in java as it w=
ould look like after you have changed it and then looking at the byte code =
will likely give you the answer you need in terms of what the byte codes ar=
e to execute your intended storage plan. Amaziningly with BCEL you could ev=
en back engineer the creation of that bytecode from BCEL.=0A=0ACan't be mor=
e specific about the approach without some details and I think once you try=
 creating the java code and looking at the bytecode you will likely work ou=
t what it is you need to do. Once you have that then its simply a question =
of how to do that in BCEL!=0A=0APaul=0A=0A=0A----- Original Message ----=0A=
From: Pranav Kuber <[email protected]>=0ATo: [email protected]=
rg=0ASent: Monday, 17 November, 2008 23:21:55=0ASubject: Popping from opera=
nd stack=0A=0AHi,=0A=0AI'm new to using BCEL and have a query.=0A=0AI'm try=
ing to instrument all IF instructions. So I just need to find out a=0Away w=
here I could access the operand stack constants (iload_1 and iload_2).=0A=
=0AFor example, -=0Aif I have some code in this format=0A=0Aif(a!=3Db)=0A  =
  do Something...=0Aelse=0A   do something...=0A=0AThe corresponding byteco=
de generated would be -=0A=0A   0:   iload_1=0A   1:   iload_2=0A   2:   if=
_icmpeq       16=0A   5:   getstatic       #2; //Field=0Ajava/lang/System.o=
ut:Ljava/io/PrintStream;=0A   8:   ldc     #3; //String TRUE=0A............=
 as so on.=0A=0AI need to pop iload_1 and iload_2 from the stack and store =
them somewhere.=0A=0AIs there any way I could do that?=0A=0AThanks for the =
help.=0A=0ARegards,=0APranav=0A=0A=0A=0A