Re: How to find field is transient using ASM

Dilanka Muthukumarana <[email protected]> Tue, 18 Dec 2018 14:49:42 +0530
Newsgroups gmane.comp.java.objectweb.asm
Message-ID <CANLbWWvXuTvPPRuPOGwi6Umu9QqqKgJWSnd3goXOxJcN9KvGMw@mail.gmail.com>
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Hi Eunsu/Keith

It works for me. Thanks for your help. much appreciated.

Regards,
Dilanka

On Tue, Dec 18, 2018 at 1:49 PM Eunsu Kim <[email protected]> wrote:

> You can check this.
>  (access & ACC_TRANSIENT) !=3D 0
>
>
> On 18 Dec 2018, at 5:10 PM, Dilanka Muthukumarana <[email protected]>
> wrote:
>
> Hi Keith,
>
> Thank you for the quick response. but if the field is private transient,
> access value coming as 130, but Opcodes.ACC_TRANSIENT value is 128.
>
> Seems if there is slight difference with the combinations of modifiers
> such as public transient / private transient.
>
> any idea about this?
>
> <image.png>
> =C3=97
>
>
> Regards,
> Dilanka
>
> On Tue, Dec 18, 2018 at 1:24 PM Keith Chapman <[email protected]>
> wrote:
>
>> Hi Dilanka,
>>
>> You can check the access field of the object and check if the bit for
>> TRANSIENT is set. You can look at [1] as a reference, they do it in there
>> using a Class Visitor,
>>
>> Regards,
>> Keith.
>>
>> http://keith-chapman.com
>>
>> [1]
>> https://github.com/consulo/objectweb-asm/blob/master/asm-commons/src/mai=
n/java/org/objectweb/asm/commons/SerialVersionUIDAdder.java
>>
>>
>> On Mon, Dec 17, 2018 at 10:55 PM Dilanka Muthukumarana <
>> [email protected]> wrote:
>>
>>>
>>> I am using asm library to find scan jars and find any class is
>>> serializable or not. But when scanning via ClassVisitor, I couldn't fig=
ure
>>> out that how I can ignore transient field which not intends to serializ=
e.
>>>
>>> Could you please give me a suggestion? Much appreciated your effort.
>>>
>>> On Tue, Dec 18, 2018 at 12:10 PM Dilanka Muthukumarana <
>>> [email protected]> wrote:
>>>
>>>>
>>>> Hi All,
>>>>
>>>> Anyone knows how could I find if the field is transient or not using
>>>> asm library.
>>>>
>>>>
>>>>
>>>> ~~~~~~~~
>>>> Regards,
>>>> Dilanka Muthukumarana
>>>>
>>>>
>>>>
>>>
>>>
>>> --
>>>
>>> ~~~~~~~~
>>> Regards,
>>> Dilanka Muthukumarana
>>>
>>>
>>>
>>> --
>>> You receive this message as a subscriber of the [email protected] list.
>>> To unsubscribe: mailto:[email protected]
>>> For general help: mailto:[email protected]?subject=3Dhelp
>>> OW2 mailing lists service home page: http://www.ow2.org/wws
>>>
>>
>
> --
>
> ~~~~~~~~
> Regards,
> Dilanka Muthukumarana
>
>
> --
> You receive this message as a subscriber of the [email protected] mailing list.
> To unsubscribe: mailto:[email protected] <[email protected]>
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>
>

--=20

~~~~~~~~
Regards,
Dilanka Muthukumarana

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<div dir=3D"ltr">Hi Eunsu/Keith<div><br></div><div>It works for me. Thanks =
for your help. much appreciated.</div><div><br></div><div>Regards,</div><di=
v>Dilanka</div></div><br><div class=3D"gmail_quote"><div dir=3D"ltr">On Tue=
, Dec 18, 2018 at 1:49 PM Eunsu Kim &lt;<a href=3D"mailto:eunsu.bill23@gmai=
l.com">[email protected]</a>&gt; wrote:<br></div><blockquote class=3D"=
gmail_quote" style=3D"margin:0px 0px 0px 0.8ex;border-left:1px solid rgb(20=
4,204,204);padding-left:1ex"><div style=3D"overflow-wrap: break-word;">You =
can check this.<div>=C2=A0<span style=3D"font-family:&quot;Bitstream Vera S=
ans Mono&quot;;font-size:13.5pt;background-color:rgb(38,50,56);color:rgb(24=
7,140,108)">(access </span><span style=3D"font-family:&quot;Bitstream Vera =
Sans Mono&quot;;font-size:13.5pt;background-color:rgb(38,50,56);color:rgb(1=
37,221,255)">&amp; </span><span style=3D"font-family:&quot;Bitstream Vera S=
ans Mono&quot;;font-size:13.5pt;background-color:rgb(38,50,56);color:rgb(24=
7,140,108)">ACC_TRANSIENT) </span><span style=3D"font-family:&quot;Bitstrea=
m Vera Sans Mono&quot;;font-size:13.5pt;background-color:rgb(38,50,56);colo=
r:rgb(137,221,255)">!=3D </span><span style=3D"font-family:&quot;Bitstream =
Vera Sans Mono&quot;;font-size:13.5pt;background-color:rgb(38,50,56);color:=
rgb(247,140,108)">0</span></div><div><div><br></div><div><br><blockquote ty=
pe=3D"cite"><div>On 18 Dec 2018, at 5:10 PM, Dilanka Muthukumarana &lt;<a h=
ref=3D"mailto:[email protected]" target=3D"_blank">[email protected]</a=
>&gt; wrote:</div><br class=3D"gmail-m_-2390539846319731034Apple-interchang=
e-newline"><div><div dir=3D"ltr" style=3D"font-family:Helvetica;font-size:4=
8px;font-style:normal;font-variant-caps:normal;font-weight:normal;letter-sp=
acing:normal;text-align:start;text-indent:0px;text-transform:none;white-spa=
ce:normal;word-spacing:0px;text-decoration:none"><div dir=3D"ltr">Hi Keith,=
<div><br></div><div>Thank you for the quick response. but if the field is p=
rivate transient, access value coming as 130, but=C2=A0Opcodes.ACC_TRANSIEN=
T value is 128.</div><div><br></div><div>Seems if there is slight differenc=
e with the combinations of modifiers such as public transient / private tra=
nsient.</div><div><br></div><div>any idea about this?</div><div><br></div><=
div><div><span id=3D"gmail-m_-2390539846319731034cid:ii_jptgwy8v0">&lt;imag=
e.png&gt;</span><div id=3D"gmail-m_-2390539846319731034eFrame-d92b6e3393c53=
b743a92a504" class=3D"gmail-m_-2390539846319731034m-encrypt-frame" style=3D=
"display:block"><a class=3D"gmail-m_-2390539846319731034m-frame-close">=C3=
=97</a><button id=3D"gmail-m_-2390539846319731034editorBtn" class=3D"gmail-=
m_-2390539846319731034m-btn gmail-m_-2390539846319731034m-encrypt-button" t=
ype=3D"button"><i class=3D"gmail-m_-2390539846319731034m-icon gmail-m_-2390=
539846319731034m-icon-editor"></i></button></div><br></div></div><div><br><=
/div><div>Regards,</div><div>Dilanka=C2=A0</div></div></div><br style=3D"fo=
nt-family:Helvetica;font-size:48px;font-style:normal;font-variant-caps:norm=
al;font-weight:normal;letter-spacing:normal;text-align:start;text-indent:0p=
x;text-transform:none;white-space:normal;word-spacing:0px;text-decoration:n=
one"><div class=3D"gmail_quote" style=3D"font-family:Helvetica;font-size:48=
px;font-style:normal;font-variant-caps:normal;font-weight:normal;letter-spa=
cing:normal;text-align:start;text-indent:0px;text-transform:none;white-spac=
e:normal;word-spacing:0px;text-decoration:none"><div dir=3D"ltr">On Tue, De=
c 18, 2018 at 1:24 PM Keith Chapman &lt;<a href=3D"mailto:keithgchapman@gma=
il.com" target=3D"_blank">[email protected]</a>&gt; wrote:<br></div><=
blockquote class=3D"gmail_quote" style=3D"margin:0px 0px 0px 0.8ex;border-l=
eft:1px solid rgb(204,204,204);padding-left:1ex"><div dir=3D"ltr"><div dir=
=3D"ltr"><div dir=3D"ltr">Hi Dilanka,<div><br></div><div>You can check the =
access field of the object and check if the bit for TRANSIENT is set. You c=
an look at [1] as a reference, they do it in there using a Class Visitor,</=
div><div><br></div><div><div><div dir=3D"ltr" class=3D"gmail-m_-23905398463=
19731034gmail-m_3638424142984411971gmail_signature"><div dir=3D"ltr">Regard=
s,<div>Keith.</div><div><br></div><div><a href=3D"http://keith-chapman.com/=
" target=3D"_blank">http://keith-chapman.com</a><br></div><div><br></div><d=
iv>[1]=C2=A0<a href=3D"https://github.com/consulo/objectweb-asm/blob/master=
/asm-commons/src/main/java/org/objectweb/asm/commons/SerialVersionUIDAdder.=
java" target=3D"_blank">https://github.com/consulo/objectweb-asm/blob/maste=
r/asm-commons/src/main/java/org/objectweb/asm/commons/SerialVersionUIDAdder=
.java</a></div></div></div></div><br></div></div></div></div><br><div class=
=3D"gmail_quote"><div dir=3D"ltr">On Mon, Dec 17, 2018 at 10:55 PM Dilanka =
Muthukumarana &lt;<a href=3D"mailto:[email protected]" target=3D"_blank">=
[email protected]</a>&gt; wrote:<br></div><blockquote class=3D"gmail_quot=
e" style=3D"margin:0px 0px 0px 0.8ex;border-left:1px solid rgb(204,204,204)=
;padding-left:1ex"><div dir=3D"ltr"><br><div><div>I am using asm library to=
 find scan=C2=A0jars and find any class is serializable or not. But when sc=
anning via ClassVisitor, I couldn&#39;t figure out that how I can ignore tr=
ansient field which not intends to serialize.</div><div><br></div><div>Coul=
d you please give me a suggestion? Much appreciated your effort.</div></div=
></div><br><div class=3D"gmail_quote"><div dir=3D"ltr">On Tue, Dec 18, 2018=
 at 12:10 PM Dilanka Muthukumarana &lt;<a href=3D"mailto:[email protected]=
m" target=3D"_blank">[email protected]</a>&gt; wrote:<br></div><blockquot=
e class=3D"gmail_quote" style=3D"margin:0px 0px 0px 0.8ex;border-left:1px s=
olid rgb(204,204,204);padding-left:1ex"><div dir=3D"ltr"><br clear=3D"all">=
<div>Hi All,</div><div><br></div><div>Anyone knows how could I find if the =
field is transient or not using asm library.</div><div><br></div><div><br><=
/div><div dir=3D"ltr" class=3D"gmail-m_-2390539846319731034gmail-m_36384241=
42984411971gmail-m_3803305906339499819gmail-m_-1603449129760279831gmail_sig=
nature"><div dir=3D"ltr">=C2=A0=C2=A0<div>~~~~~~~~</div><div>Regards, =C2=
=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =
=C2=A0 =C2=A0 =C2=A0 =C2=A0<br>Dilanka Muthukumarana=C2=A0=C2=A0 =C2=A0=C2=
=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =
=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0=
 =C2=A0 =C2=A0 =C2=A0 =C2=A0<br><div>=C2=A0 =C2=A0 =C2=A0=C2=A0</div></div>=
</div></div></div></blockquote></div><br clear=3D"all"><div><br></div>--<sp=
an class=3D"gmail-m_-2390539846319731034Apple-converted-space">=C2=A0</span=
><br><div dir=3D"ltr" class=3D"gmail-m_-2390539846319731034gmail-m_36384241=
42984411971gmail-m_3803305906339499819gmail_signature"><div dir=3D"ltr">=C2=
=A0=C2=A0<div>~~~~~~~~</div><div>Regards, =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=
=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0<b=
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<br><div>=C2=A0 =C2=A0 =C2=A0=C2=A0</div></div></div></div><br>--<span clas=
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ormal;font-weight:normal;letter-spacing:normal;text-align:start;text-indent=
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n:none"><div dir=3D"ltr" class=3D"gmail-m_-2390539846319731034gmail_signatu=
re" style=3D"font-family:Helvetica;font-size:48px;font-style:normal;font-va=
riant-caps:normal;font-weight:normal;letter-spacing:normal;text-align:start=
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xt-decoration:none"><div dir=3D"ltr">=C2=A0=C2=A0<div>~~~~~~~~</div><div>Re=
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" class=3D"gmail_signature"><div dir=3D"ltr">=C2=A0=C2=A0<div>~~~~~~~~</div=
><div>Regards, =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=
=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0<br>Dilanka Muthukumarana=C2=
=A0=C2=A0 =C2=A0=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=
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