How to find the crash point in mipsandroid platform/C/C++ program
How to find the crash point in mipsandroid platform:
ps - to list down all the processes
ps id : 568 for /system/bin/mediaserver.
It is best to put the following command while the application is executing/try to play streaming.
Issues I observed:
librtsp.so is not loaded without try streaming. rtsp.so is loaded at runtime, so it has to be
cat /proc/568/maps
00080000-00082000 rwxp 00000000 08:05 64767 /system/bin/mediaserver
00082000-000a0000 rwxp 00082000 00:00 0 [heap]
10000000-10100000 rw-p 10000000 00:00 0
2aaa8000-2aab0000 r--s 00000000 00:07 160 /system_properties (deleted)
2aab0000-2abae000 r--p 00000000 08:05 56876 /dev/binder
5060d000-50611000 rwxp 5060d000 00:00 0
50700000-50778000 rwxp 00000000 08:05 64939 /system/lib/librtsp.so
50800000-50880000 rwxp 00000000 08:05 64873 /system/lib/libhttp.so
69f00000-69f39000 rwxp 00000000 08:05 64875 /system/lib/libbinder.so
6d800000-6d80f000 rwxp 00000000 08:05 64892 /system/lib/libdrm1.so
6d80f000-6d810000 rwxp 6d80f000 00:00 0
76180000-762e6000 rwxp 00000000 08:05 64905 /system/lib/libopencore_common.so
78400000-7859b000 rwxp 00000000 08:05 64933 /system/lib/libopencore_player.so
78700000-78706000 rwxp 00000000 08:05 64919 /system/lib/libopencore_mp4localreg.so
I/DEBUG ( 484): *** *** *** *** *** *** *** *** *** *** *** *** *** *** *** ***
I/DEBUG ( 484): Build fingerprint: 'generic/generic/generic/:2.1-update1/ECLAIR/eng.root.20100819.121118:eng/test-keys'
I/DEBUG ( 484): pid: 568, tid: 842 >>> /system/bin/mediaserver <<<
I/DEBUG ( 484): signal 11 (SIGSEGV), fault addr 00000000
I/DEBUG ( 484): zr 00000000 at 00091d65 v0 00000000 v1 00000000
I/DEBUG ( 484): a0 00000000 a1 00091d65 a2 00000025 a3 00000000
I/DEBUG ( 484): t0 00000000 t1 00000000 t2 00000000 t3 00000000
I/DEBUG ( 484): t4 203e3e20 t5 00000001 t6 00000000 t7 79616c50
I/DEBUG ( 484): s0 785a1ab0 s1 7859a248 s2 7855f060 s3 00093f24
I/DEBUG ( 484): s4 00000000 s5 761b4e78 s6 762e5594 s7 762e5590
I/DEBUG ( 484): t8 00000008 t9 7ef0fca0 k0 00091d65 k1 00000000
I/DEBUG ( 484): gp 7ef6fd60 sp 2b0aecc8 s8 2b0aee28 ra 78552da4
I/DEBUG ( 484): hi 30bb3c31 lo 718c07e0 bva 00000000 epc 78552da8
I/DEBUG ( 484): #00 pc 78552da8 /system/lib/libopencore_player.so
I/DEBUG ( 484): #01 ra 78552da4 /system/lib/libopencore_player.so
I/DEBUG ( 484):
I/DEBUG ( 484): code around pc:
I/DEBUG ( 484): 78552d98 8f999dc8 0320f809 8e048788 8e24000c
I/DEBUG ( 484): 78552da8 8c8b0000 8d790024 0320f809 00000000
I/DEBUG ( 484): 78552db8 8fbc0010 144000fd ae620000 240d0008
I/DEBUG ( 484):
I/DEBUG ( 484): code around lr:
I/DEBUG ( 484): 78552d94 8fbc0010 8f999dc8 0320f809 8e048788
I/DEBUG ( 484): 78552da4 8e24000c 8c8b0000 8d790024 0320f809
I/DEBUG ( 484): 78552db4 00000000 8fbc0010 144000fd ae620000
I/DEBUG ( 484):
I/DEBUG ( 484): stack:
I/DEBUG ( 484): 2b0aec88 00000000
I/DEBUG ( 484): 2b0aec8c 00000000
I/DEBUG ( 484): 2b0aec90 00000000
I/DEBUG ( 484): 2b0aec94 00000000
I/DEBUG ( 484): 2b0aec98 00000000
I/DEBUG ( 484): 2b0aec9c 00000000
I/DEBUG ( 484): 2b0aeca0 2b0aec98
I/DEBUG ( 484): 2b0aeca4 00000001
I/DEBUG ( 484): 2b0aeca8 00000000
I/DEBUG ( 484): 2b0aecac 00095c14 [heap]
I/DEBUG ( 484): 2b0aecb0 00000025
I/DEBUG ( 484): 2b0aecb4 761b4e78 /system/lib/libopencore_common.so
I/DEBUG ( 484): 2b0aecb8 785a1ab0
I/DEBUG ( 484): 2b0aecbc 7859a248 /system/lib/libopencore_player.so
I/DEBUG ( 484): 2b0aecc0 7855f060 /system/lib/libopencore_player.so
I/DEBUG ( 484): 2b0aecc4 78552da4 /system/lib/libopencore_player.so
I/DEBUG ( 484): 2b0aecc8 0009ba70 [heap]
I/DEBUG ( 484): 2b0aeccc 00000000
I/DEBUG ( 484): 2b0aecd0 00000000
I/DEBUG ( 484): 2b0aecd4 00000001
I/DEBUG ( 484): 2b0aecd8 7859f4b0
I/DEBUG ( 484): 2b0aecdc 761b62d8 /system/lib/libopencore_common.so
I/DEBUG ( 484): 2b0aece0 785a1ab0
I/DEBUG ( 484): 2b0aece4 0009ba70 [heap]
I/DEBUG ( 484): 2b0aece8 00095bb8 [heap]
I/DEBUG ( 484): 2b0aecec 00095c14 [heap]
I/DEBUG ( 484): 2b0aecf0 00000000
I/DEBUG ( 484): 2b0aecf4 7853e094 /system/lib/libopencore_player.so
I/DEBUG ( 484): 2b0aecf8 00095c14 [heap]
I/DEBUG ( 484): 2b0aecfc 7853c9e8 /system/lib/libopencore_player.so
I/DEBUG ( 484): 2b0aed00 00093d90 [heap]
I/DEBUG ( 484): 2b0aed04 00000006
I/DEBUG ( 484): 2b0aed08 00093f24 [heap]
I/DEBUG ( 484): 2b0aed0c 00095c14 [heap]
I/DEBUG ( 484): 2b0aed10 7859f4b0
I/DEBUG ( 484): 2b0aed14 761b4e78 /system/lib/libopencore_common.so
I/DEBUG ( 484): 2b0aed18 00094038 [heap]
I/DEBUG ( 484): 2b0aed1c 00000006
I/DEBUG ( 484): 2b0aed20 00093d90 [heap]
I/DEBUG ( 484): 2b0aed24 785454e4 /system/lib/libopencore_player.so
I/DEBUG ( 484): 2b0aed28 00093d90 [heap]
I/DEBUG ( 484): 2b0aed2c 0009ba70 [heap]
I/DEBUG ( 484): 2b0aed30 7ef6fd60
I/DEBUG ( 484): 2b0aed34 00095c64 [heap]
I/DEBUG ( 484): 2b0aed38 00000000
I/DEBUG ( 484): 2b0aed3c 00095c68 [heap]
I/DEBUG ( 484): 2b0aed40 00095c14 [heap]
I/DEBUG ( 484): 2b0aed44 00000000
I/DEBUG ( 484): 2b0aed48 761b4e78 /system/lib/libopencore_common.so
I/DEBUG ( 484): 2b0aed4c 762e5594 /system/lib/libopencore_common.so
I/DEBUG ( 484): 2b0aed50 762e5590 /system/lib/libopencore_common.so
I/DEBUG ( 484): 2b0aed54 7ef52a7c /system/lib/libc.so
I/DEBUG ( 484): 2b0aed58 2b0aedd0
I/DEBUG ( 484): 2b0aed5c 00000000
I/DEBUG ( 484): 2b0aed60 00095bc4 [heap]
I/DEBUG ( 484): 2b0aed64 761a441c /system/lib/libopencore_common.so
I/DEBUG ( 484): 2b0aed68 7ef6fd60
I/DEBUG ( 484): 2b0aed6c 00000001
I/DEBUG ( 484): 2b0aed70 fffffffb
I/DEBUG ( 484): 2b0aed74 00000000
I/DEBUG ( 484): 2b0aed78 7859f4b0
I/DEBUG ( 484): 2b0aed7c 00000000
I/DEBUG ( 484): 2b0aed80 00000001
I/DEBUG ( 484): 2b0aed84 7ef52b4c /system/lib/libc.so
I/DEBUG ( 484): 2b0aed88 7ef6fd60
I/DEBUG ( 484): 2b0aed8c 2b0aed90
I/DEBUG ( 484): 2b0aed90 00000000
I/DEBUG ( 484): 2b0aed94 00000000
I/DEBUG ( 484): 2b0aed98 00000000
I/DEBUG ( 484): 2b0aed9c 00000000
I/DEBUG ( 484): 2b0aeda0 00000000
I/DEBUG ( 484): 2b0aeda4 00095bb8 [heap]
I/DEBUG ( 484): 2b0aeda8 00095c14 [heap]
I/DEBUG ( 484): 2b0aedac 00095c60 [heap]
I/DEBUG ( 484): 2b0aedb0 7ef6fd60
I/DEBUG ( 484): 2b0aedb4 7ef118ac /system/lib/libc.so
I/DEBUG ( 484): 2b0aedb8 00095c14 [heap]
I/DEBUG ( 484): 2b0aedbc 761b8e04 /system/lib/libopencore_common.so
I/DEBUG ( 484): 2b0aedc0 762eac70
I/DEBUG ( 484): 2b0aedc4 00095c14 [heap]
I/DEBUG ( 484): 2b0aedc8 7ef6fd60
I/DEBUG ( 484): 2b0aedcc 00093d94 [heap]
I/DEBUG ( 484): 2b0aedd0 00095c7c [heap]
I/DEBUG ( 484): 2b0aedd4 761b4f3c /system/lib/libopencore_common.so
I/DEBUG ( 484): 2b0aedd8 00093d94 [heap]
I/DEBUG ( 484): 2b0aeddc 00095c54 [heap]
I/DEBUG ( 484): 2b0aede0 00095c14 [heap]
I/DEBUG ( 484): 2b0aede4 761b7e9c /system/lib/libopencore_common.so
I/DEBUG ( 484): 2b0aede8 00093f98 [heap]
I/DEBUG ( 484): 2b0aedec 761a441c /system/lib/libopencore_common.so
I/DEBUG ( 484): 2b0aedf0 762eac70
W/ActivityManager( 661): Activity pause timeout for HistoryRecord{2e933808 com.player.mp/.MediaPlayer}
I/DEBUG ( 484): 2b0aedf4 761a4974 /system/lib/libopencore_common.so
I/DEBUG ( 484): 2b0aedf8 00094038 [heap]
I/DEBUG ( 484): 2b0aedfc 762e5494 /system/lib/libopencore_common.so
I/DEBUG ( 484): 2b0aee00 00093d94 [heap]
I/DEBUG ( 484): 2b0aee04 00095c7c [heap]
I/DEBUG ( 484): 2b0aee08 00095bb8 [heap]
I/DEBUG ( 484): 2b0aee0c 761b5104 /system/lib/libopencore_common.so
I/DEBUG ( 484): 2b0aee10 00095bb8 [heap]
I/DEBUG ( 484): 2b0aee14 00093d94 [heap]
I/DEBUG ( 484): 2b0aee18 7ef6fd60
I/DEBUG ( 484): 2b0aee1c 00000000
I/DEBUG ( 484): 2b0aee20 762eac70
I/DEBUG ( 484): 2b0aee24 00000000
I/DEBUG ( 484): 2b0aee28 00000000
I/DEBUG ( 484): 2b0aee2c 00000000
I/DEBUG ( 484): 2b0aee30 00000000
I/DEBUG ( 484): 2b0aee34 00093f80 [heap]
I/DEBUG ( 484): 2b0aee38 2b0aee2c
I/DEBUG ( 484): 2b0aee3c 00095c00 [heap]
I/DEBUG ( 484): 2b0aee40 00093f80 [heap]
Crash library address range:
78400000-7859b000 rwxp 00000000 08:05 64933 /system/lib/libopencore_player.so
PC :
-------
#00 pc 78552da8 /system/lib/libopencore_player.so
Diff/Lookup Address: (78552da8-78400000) = 0x152DA8
How to calculate lookup address:
Lookup Address = (Crash address - loadingAddress of a library)
Find crash point address Using addr2line along with Lookup address:
root@laptop:/opt/mips-4.3/bin# ./mips-linux-gnu-addr2line -e
/home/Streaming/mipsandroid/out/target/product/generic/symbols/system/lib/libopencore_player.so 0x152da8
/home/Streaming/mipsandroid/external/opencore/android/MediaControl.cpp:415
root@laptop:/opt/mips-4.3/bin#
The crash is at 415 th line in /home/Streaming/mipsandroid/external/opencore/android/MediaControl.cpp file.
Reason: Null pointer in mStack that is the reason for the crash.
The code is as below without NULL check
aResult = mStack->stackStop();
To resolve this issue, I added the below code:
if(!mStack)
{
return;
}
aResult = mStack->stackStop();
posted by Sundar at 6:20 AM
1 Comments:
how did you calculate Crash library address range? I am facing a similar issue.
Any pointer towards this would be helpful.
Thanks and regards,
Chaitral Purkar
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