1115639 - [FFOS7715 v2.1] fail to debug gecko code via ./run-gdb.sh without attach any pid

Status: RESOLVED DUPLICATE of bug 1078383

(Firefox OS Graveyard :: General, defect)

Comment 1

[ben.song]

While debug some gecko code via gdb without attach any pid and continue, the phone would not restart, but happens some problem like this:

Program received signal SIGSEGV, Segmentation fault.
0x0000af4e in ReserveFileDescriptors (aReservedFds=...) at ../../../gecko/b2g/app/B2GLoader.cpp:239
239	../../../gecko/b2g/app/B2GLoader.cpp: No such file or directory.

Comment 2

[shawn ku [:sku]]

Hi Ben:
 Please repo sync all the source, re-build the code, and flash.

gdb server got some issue, and get fixed last week. (both m-c and 2.1)

Let me know if you still have issue on this.

Thanks!!
Shawn

Comment 3

[shawn ku [:sku]]

folder: prebuilts/misc

commit 96fbd91680ad26d55aacdcf343371263089bb2df
Author: Cervantes Yu <[e-mail]>
Date:   Fri Oct 24 09:39:07 2014 +0800

    Bug 1078383: Update gdbserver to v7.7. r=mwu
    
    This gdbserver binary is built using:
    
    1. Download gdb 7.7 source from GNU web site and extract to $GDB_SOURCE (such as /opt/build/gdb/gdb-7.7/)
    2. Under $B2G_REPO (B2G repo dir, such as ~/git/flame-kk/B2G/),
     2.1 source setup.sh
     2.2 cd $GDB_SOURCE/gdb/gdbserver
     2.3 CFLAGS="--sysroot=$B2G_REPO/prebuilts/ndk/8/platforms/android-14/arch-arm" ./configure --host=arm-linux-androideabi
     2.4 make
     2.5 arm-linux-androideabi-strip ./gdbserver

Comment 4

[ben.song]

(In reply to shawn ku [:sku] from comment #2)
> Hi Ben:
>  Please repo sync all the source, re-build the code, and flash.
> 
> gdb server got some issue, and get fixed last week. (both m-c and 2.1)
> 
> Let me know if you still have issue on this.
> 
> Thanks!!
> Shawn

Dear Shawn,

I have tried to start run-gdb.sh without attach pid after repo sync and build, flash. But it still couldn't debug normal which restart and stay at the breakpoint.

Thanks.

Comment 5

[Vance Chen [:vchen][skype:vance.lucida][[e-mail]]]

Hi Cervantes, do you have any idea about why partner still cannot use gdb attach?

Thanks

Comment 6

[Cervantes Yu [:cyu] [:cervantes]]

Please check gdbserver version. You should use gdbserver 7.7 like:

$ adb shell gdbserver --version
GNU gdbserver (GDB) 7.7.1
Copyright (C) 2014 Free Software Foundation, Inc.
gdbserver is free software, covered by the GNU General Public License.
This gdbserver was configured as "arm-linux-androideabi"

If it's still 7.6 then you need to check your prebuilts/misc/. You may push gdbserver manually to /system/bin/.

Comment 7

[ben.song]

(In reply to Cervantes Yu from comment #6)
> Please check gdbserver version. You should use gdbserver 7.7 like:
> 
> $ adb shell gdbserver --version
> GNU gdbserver (GDB) 7.7.1
> Copyright (C) 2014 Free Software Foundation, Inc.
> gdbserver is free software, covered by the GNU General Public License.
> This gdbserver was configured as "arm-linux-androideabi"
> 
> If it's still 7.6 then you need to check your prebuilts/misc/. You may push
> gdbserver manually to /system/bin/.

Dear Cervantes,

While we do update gdbserver to 7.7, it would bring some problem like this:

SPREADTRUM\ben.song@bensongubtpc:/opt/build/gdb/gdb-7.7/gdb/gdbserver$ CFLAGS="/home/likewise-open/SPREADTRUM/ben.song/code/7715_2.1.2_ea/B2G/prebuilts/ndk/8/platforms/android-14/arch-arm" ./configure --host=arm-linux-androideabi
configure: WARNING: If you wanted to set the --build type, don't use --host.
    If a cross compiler is detected then cross compile mode will be used.
checking whether to enable maintainer-specific portions of Makefiles... no
checking for arm-linux-androideabi-gcc... arm-linux-androideabi-gcc
checking for C compiler default output file name... 
configure: error: in `/opt/build/gdb/gdb-7.7/gdb/gdbserver':
configure: error: C compiler cannot create executables
See `config.log' for more details.

Do you know how can we fix it ? Thanks.

Comment 8

[Cervantes Yu [:cyu] [:cervantes]]

(In reply to ben.song from comment #7)
> Dear Cervantes,
> 
> While we do update gdbserver to 7.7, it would bring some problem like this:
> 
> SPREADTRUM\ben.song@bensongubtpc:/opt/build/gdb/gdb-7.7/gdb/gdbserver$
> CFLAGS="/home/likewise-open/SPREADTRUM/ben.song/code/7715_2.1.2_ea/B2G/
> prebuilts/ndk/8/platforms/android-14/arch-arm" ./configure
> --host=arm-linux-androideabi
> configure: WARNING: If you wanted to set the --build type, don't use --host.
>     If a cross compiler is detected then cross compile mode will be used.
> checking whether to enable maintainer-specific portions of Makefiles... no
> checking for arm-linux-androideabi-gcc... arm-linux-androideabi-gcc
> checking for C compiler default output file name... 
> configure: error: in `/opt/build/gdb/gdb-7.7/gdb/gdbserver':
> configure: error: C compiler cannot create executables
> See `config.log' for more details.
> 
> Do you know how can we fix it ? Thanks.

You didn't specify the CFLAGS argument correctly. Note the --sysroot= in it.

Why would you like to build gdbserver from scratch? gdbserver 7.7 is in built binary form under prebuilts/misc/android-arm.

Comment 9

[ben.song]

(In reply to Cervantes Yu from comment #8)
> (In reply to ben.song from comment #7)
> > Dear Cervantes,
> > 
> > While we do update gdbserver to 7.7, it would bring some problem like this:
> > 
> > SPREADTRUM\ben.song@bensongubtpc:/opt/build/gdb/gdb-7.7/gdb/gdbserver$
> > CFLAGS="/home/likewise-open/SPREADTRUM/ben.song/code/7715_2.1.2_ea/B2G/
> > prebuilts/ndk/8/platforms/android-14/arch-arm" ./configure
> > --host=arm-linux-androideabi
> > configure: WARNING: If you wanted to set the --build type, don't use --host.
> >     If a cross compiler is detected then cross compile mode will be used.
> > checking whether to enable maintainer-specific portions of Makefiles... no
> > checking for arm-linux-androideabi-gcc... arm-linux-androideabi-gcc
> > checking for C compiler default output file name... 
> > configure: error: in `/opt/build/gdb/gdb-7.7/gdb/gdbserver':
> > configure: error: C compiler cannot create executables
> > See `config.log' for more details.
> > 
> > Do you know how can we fix it ? Thanks.
> 
> You didn't specify the CFLAGS argument correctly. Note the --sysroot= in it.
> 
> Why would you like to build gdbserver from scratch? gdbserver 7.7 is in
> built binary form under prebuilts/misc/android-arm.

Dear Cervantes,
Base on your help I have passed 1 to 2.4, but in 2.5 a problem happens like this:arm-linux-androideabi-strip:./gdbserver: File format not recognized. Do I need modify the CC value ?

Thanks.

Comment 10

[Cervantes Yu [:cyu] [:cervantes]]

(In reply to ben.song from comment #9)
> Dear Cervantes,
> Base on your help I have passed 1 to 2.4, but in 2.5 a problem happens like
> this:arm-linux-androideabi-strip:./gdbserver: File format not recognized. Do
> I need modify the CC value ?
> 
> Thanks.

You don't need to. The steps in the commit comment is all I have to do to produce the binary. I am not sure what problem you encountered, but it works on my side. If you only need to have gdb working, why not use the prebuilt binary?

Comment 11

[Vance Chen [:vchen][skype:vance.lucida][[e-mail]]]

Hi Song Ben, as Cervantes mentioned, you really don't need to build your own gdb server, it is placed in the prebuilts/misc/android-arm in the AOSP source tree. I am sure you have that available in SPRD...Could you try it first to see if there is still any problem? that will save you sometime I believe

Comment 12

[ben.song]

(In reply to Vance Chen [:vchen][[e-mail]] from comment #11)
> Hi Song Ben, as Cervantes mentioned, you really don't need to build your own
> gdb server, it is placed in the prebuilts/misc/android-arm in the AOSP
> source tree. I am sure you have that available in SPRD...Could you try it
> first to see if there is still any problem? that will save you sometime I
> believe

Dear Vance, Cervantes,

OK, I would update my code and push into phone, then try it.

Thanks a lot.

Comment 13

[ben.song]

(In reply to Vance Chen [:vchen][[e-mail]] from comment #11)
> Hi Song Ben, as Cervantes mentioned, you really don't need to build your own
> gdb server, it is placed in the prebuilts/misc/android-arm in the AOSP
> source tree. I am sure you have that available in SPRD...Could you try it
> first to see if there is still any problem? that will save you sometime I
> believe

Dear Vance,

Does gdbserver updated by build and flash ? I try the newest version of sprd, but the version still is 7.6.

Thanks.

Comment 14

[Vance Chen [:vchen][skype:vance.lucida][[e-mail]]]

Hi Cervantes -

Could you help to attach the gdb server ver 7.7 on Bugzilla?

Thanks

Vance

Comment 15

[Cervantes Yu [:cyu] [:cervantes]]

Did you update your repo manifest?

Please note that $B2G_REPO/prebuilts/misc is now using https://github.com/mozilla-b2g/platform_prebuilts_misc that we forked from AOSP.

You should be able to sync it from here.

Comment 17

[ben.song]

(In reply to Cervantes Yu from comment #16)
> 
> *** This bug has been marked as a duplicate of bug 1078383 ***

Dear Cervantes,

I have downloaded a new B2G code, and run gitk under /B2G/prebuilts/misc/android-arm/gdbserver, but without this submit you said.

Thanks.

Comment 18

[Cervantes Yu [:cyu] [:cervantes]]

Is your $B2G_REPO/.repo/manifests/base-kk.xml updated?
It should contain the following:
<project name="platform_prebuilts_misc" path="prebuilts/misc" remote="b2g" revision="b2g-4.4.2_r1"/>

Please make sure your repo config for your device use this project as in base-kk.xml.