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Author Topic: [Q] how change apps priority as system ???  (Read 4567 times)

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Offline fbashishir

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[Q] how change apps priority as system ???
« on: August 03, 2014, 11:46:05 pm »
sometimes apps like jbktaskman exits while low ram, on accidently when i press menu button two times rapidly. How to change apps priority to system????

Offline Allstar12345

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Re: [Q] how change apps priority as system ???
« Reply #1 on: August 04, 2014, 12:02:44 am »
Only the developer can do that for a permanent change, even then it's not low RAM, it takes 30+ Open apps to even make the OS ponder whether to start closing stuff.

Why are you pressing the menu button twice though ?

Offline matthew

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Re: [Q] how change apps priority as system ???
« Reply #2 on: August 04, 2014, 12:15:34 am »
i am not 100% certain about this, but i am pretty sure there is a Central Repository entry to which you can add UIDs to protect from system-mandated app closure.
When i can get on the PC, i will try to find it. No promises, though - i might be mistaken on this one.
« Last Edit: August 04, 2014, 12:16:39 am by matthew »

Offline fbashishir

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Re: [Q] how change apps priority as system ???
« Reply #3 on: August 04, 2014, 01:29:57 am »
Why are you pressing the menu button twice though ?

thanks for fast reply. Double press sometimes occurs accidentally. So i mentioned.

Offline fbashishir

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Re: [Q] how change apps priority as system ???
« Reply #4 on: August 04, 2014, 01:33:25 am »
i am not 100% certain about this, but i am pretty sure there is a Central Repository entry to which you can add UIDs to protect from system-mandated app closure.
When i can get on the PC, i will try to find it. No promises, though - i might be mistaken on this one.

long ago, i read something like that, but i forgot. So seeking help about this.......

Offline huellif

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Re: [Q] how change apps priority as system ???
« Reply #5 on: August 08, 2014, 11:00:24 pm »
You can change the starting process priority setting via epocID, but if the app changes it while it's running this doesn't make sense. At least it's worth a try ;)
For you can change the max heap memory this way if an app shows you the memory full popup.

Are you using a CFW? And which phone and firmware are you using?
Most proper CFWs have optimized config files for the RAM and should fix this typical Symbian issues at least a bit.
« Last Edit: August 08, 2014, 11:02:16 pm by huellif »

Offline fbashishir

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Re: [Q] how change apps priority as system ???
« Reply #6 on: August 11, 2014, 01:14:25 am »
You can change the starting process priority setting via epocID

will u please make jbkTaskman system app for me.... It would be helpful....

Offline huellif

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Re: [Q] how change apps priority as system ???
« Reply #7 on: August 12, 2014, 10:17:26 pm »
System app has to get set by the app itself, it's not part of the E32ImageHeader :/
Sorry I thought you mean the priority itself, system app is a flag and not a priority.
« Last Edit: August 12, 2014, 10:18:27 pm by huellif »

Offline fbashishir

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Re: [Q] how change apps priority as system ???
« Reply #8 on: August 13, 2014, 02:47:04 am »
many apps like xplore has option to set as system app which prevents them to crash on low memory. Is there any way to make an app system app???

Offline huellif

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Re: [Q] how change apps priority as system ???
« Reply #9 on: August 17, 2014, 09:45:14 pm »
Apps have to do that by theirself, it's a simple euser.dll (user side kernel .dll) call, I don't know an API which can do that for other apps.

But you can try to disassable the app and inject the related call via shellcode hacking, but that's really not that easy.
Read here: http://www.mulliner.org/symbian/feed/CollinMulliner_Exploiting_Symbian_BlackHat_Japan_2008.pdf