Android :: Way To Debug Kernel Code?
Sep 10, 2010
I've got some trouble with the media backend (mostly Stagefrightplayer) in Android, and I'd like to understand why it throws the errors it does. The errors are usually device spesific, so debugging on an emulator wouldn't be sufficient.
Example:
CODE:.................
Example 2:
CODE:.............................
I've also gotten the player to bork completely and spit out a traces.txt.
Is there a way to debug what's happening, just like I debug Java code?
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Apr 27, 2010
I am programming Android applications, and the best way here may or may not be the same as Java in general.I simply want to be able to set a debug flag that will only execute certain portions of code when it's set to true equiv to C++ setting a preprocessor #define DEBUG and using #ifdef DEBUG.Is there an accepted or best way to accomplish this in Java?
Right now I'm just going to set a variable in my Application object, but I don't imagine this is the best way.
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Jun 18, 2010
I created one android application it is using one native method. I created shared library using ndk tools.My jni function is having some problems i want to debug it. How to debug it in eclipse tool
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Nov 23, 2010
When I debug android app, if I work with Java, I can use Log.d("TAG", "xxxx", new Throwable()) to print backtrace of Java code. This is really handy for me to find bugs. But when I work with native library (e.g. libwebcore.so), there seems no way to print backtrace in runtime. The only way to debug native code is use gdbserver.
I have a question: Is there any way to print backtrace in C/C++?
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Jul 25, 2010
I have a activity B that is called by activity A, I want to debug the code in B. I have set the breakpoint, however the debug control never enters B.
CODE:................
When I debug in eclipse, although the class B is called from class A, the debbugger pointer never enters the new window, where I have placed a debug point in Class B. I am not able to take the pointer control to class B and stop at a specific point, which will help me verify certain variable values.
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Oct 12, 2009
I am running Eclipse on Win32 and my Android emulator on Linux.
Is there a way to use Win32 eclipse to debug code on the emulator that runs on Linux?
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Jul 21, 2010
I set a toggle breakpoint at line 36 of the main class, of APIDemos 8, the debug begins at the OnCreate but never processes another line in the class. Why is that?
Here's the code starting a line 36. Code...
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Jul 28, 2010
I want to access the build type [release/debug] in java code and xml file to enable or disable the particular feature at the run time.
Please let me know if we have any environment variable defined for it which can be accessed in java code and in xml file also.
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Nov 17, 2009
Can anyone please do share the android 1.6 (donut) kernel source code.
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Sep 12, 2010
I am writing an android game that involves some c++. I have a fairly repeatable crash that seems to be due to my c++ code
Looking at the page:
http://source.android.com/porting/debugging_native.html#Debug_Scenarios (right at the end)
it says to run the output through the "stack tool" - which I can find no trace of.. nor aproto.
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Jan 22, 2010
I have a brand new Nexus One. I'm trying to follow the directions for installing the USB driver. When I plug in the device, it doesn't start the New Hardware Wizard, as the documentation suggests. I can run hdwwiz.exe to launch it and manually install the driver, but when I do, Device Manager says: "This device cannot start. (Code 10)"
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Jul 2, 2009
I'm trying to debug my native JNI code located on a shared library. I have been trying to debug using gdb/gdbserver.
Here is how I go about, trying to debug:
How to debug JNI native code on the Android emulator I'm using gdb/gdbserver I do this at the emulator terminal gdbserver localhost:
CODE:..............
when I step on the Android Java code so the function Java_testJNI_printHello is called, I get this error on the server side gdb: Unable to get location for thread creation breakpoint: requested event is not supported
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Jul 9, 2010
Is there a good way (proper way, or effective way) to debug slow running code? I have a thread which runs multiple loops and then recurses and my code is running very slow. Is there a good way to debug different loops or sections of code to find out which is running slowest?
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May 13, 2009
Is there a way to debug Android source code with eclipse?
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Jul 28, 2009
I'd like to download the android kernel completely. Can I know from where I can get the site to install the android kernel and also the complete source code of the emulator. Also from where can I get the patches of the git?
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Jan 2, 2014
I have an xperia X8 with some naa kernel and xperiadroidx 6.1.The thing is that with this custom kernel and ROM when i put a SIM from another network carrier, the question asking for the SIM-unlock code input is not showing up. (this appeared before when phone was in stock state).Is it possible to do it without re-flashing to stock?
...or i have to put back the phone to stock? What is the easiest/safest/best way to do this? using the restore option in "PC companion" SE app? Is it only needed to put the stock kernel and ROM, or Do i also need to re-lock the bootloader?
I don't need the whole explanation, just a little guidance, just a few tips to know what to do, then i can google/search myself for the specifics on how to actually do it.
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Dec 14, 2009
Does anyone submit source code into Android code? Is there limitation to someone that sumbit? How to do this procedure? (I would like to submit device driver into Android kernel source code)
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Apr 15, 2012
i have: CMW recovery, Kernel source code on local computer, full repo cm source + toolchains.
How to add my device tree, kernel source code to CM source and compile CM7 ROm?
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Nov 18, 2010
Does anybody know if the new desktop kernel patch written by Mike Galbraith can be applied or modified to be used in the android kernel?
Tiny Linux Kernel Patch Delivers Huge Speed Boost - PCWorld Business Center
I haven't messed around with android kernels yet, but I have applied it to my current Ubuntu 10.10 system and you can see the difference. Its like night & day!
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Mar 3, 2010
I have vanilla linux kernel version 2.6.27. I want to apply android specific patches and convert it to android linux kernel 2.6.27. Where can a user find the patches to convert a normal vanilla kernel into android kernel?
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Jun 11, 2010
where I have got right now on my phone, which is:
1. I updated to stock 2.1 using the sprint update tool.
2. I followed the video tutorial to root the phone
3. then i used joey's page (http://www.joeyconway.com/sdx/custom/index.php) to install the his kernel (joeykrim-SDX-kernel v2.0.4 (includes root)).
I have done nothing else to the phone but this and removing a couple of bloatware apps (i checked the list of permitted deletions before i removed anything.) I have not installed a new recovery..at least i dont think that I did as part of one of the other operations I performed (as an aside, i am not really sure what the custom recovery is or what it is used for, so i didnt install it...i guess i need to read up more...)
So that is where I am..but i have a couple of questions.
1) i am now having issues with my wifi connection - the signal reception is very spotty in areas where i should have atleast 2 bars of reception, and the wifi often cuts out completely....Is there any know corellation between joey's kernel and this wifi issue? I have searched the forums and have found nothing that answers this.
2) Is there an easy way to get back to the stock kernel? I have read that i can get back to stock everything by using the sprint download center where I did my original 2.1 update. But is there a way to get back to just the stock kernel without wiping the phone?
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Jun 9, 2012
I have u8800 and 3.0.8 AOSP kernel. But not runnig cm9 with AOSP kernel. How to port aosp kernel to cm9 kernel.
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May 20, 2010
I currently have bekit 1ghz kernet installed, but I was interested in trying out some other kernels. Can I just install them via Rom Manager over the first kernel? Or is there some kind of uninstall process I should use first?
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Jul 13, 2009
I'm working for Freescale Semiconductor on the i.MX series linux BSP. Now we have android running well on i.MX515 platform, and hope to push android kernel repo into android.git.kernel.org. Then what's the process need us to follow? How reviews will be done? And what we should provide?
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Feb 19, 2009
I wanna to add some code in Camera Apps code , so that it will invoke my Application and do the thing as per my desier. Is it possible to change the Application code? If any one already tried this then plz let me know, how to proceed and build if i change some code. How to integrate my application with camera apps.
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Jan 27, 2010
I can build a daemon with my algorithm code and main function.I put all files in one folder under /development and make This executable file works successfully
Now I want to separate my algorithm code and main function code. I hope to build a binary library with my algorithm code and main function will link this binary library to use.
Where to put my algorithm code to create binary library and how to link this binary library in main function code?
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Jan 22, 2010
I am trying to integrate my code to the android Home Screen code. I want to launch my activity frm the HomeScreen by click of a button. I Did the code & then build it but when i click the button i m getting error as Application not installed on phone.
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Aug 11, 2010
What is the best way to debug ANR. ideally, it would be nice to know what call / thread / file and line number it is stalled at when the ANR occurs, but every time I look at /anr/traces.txt, I can't seem to find anything that points to something I can start tracking down.
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Nov 8, 2009
I have mostly been avoiding debugging when I can because of these two problems, so hopefully someone here has suggestions to avoid them:
1. It seems that I have to build the SDK (`make sdk`) and copy it off to a directory for Eclipse to use almost every time I want to debug. I haven't followed through the "sdk" directive, so I'm not clear on why this is necessary instead of just having Eclipse read from the source in my directory. Isn't there some way for it to do this? FYI: I have a (modified) full checkout of Donut, not just the SDK.
2. How can I debug without using Eclipse? I would really like to be able to use something like gdb/jdb.
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Aug 6, 2009
My app is crashing, How do I debug it? I'm using a HTC Magic and eclips. I looked in the documentation, but it doesn't say how to go about doing it.
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