【Mstar Andriod】【教你解析coredump】

【Mstar Andriod】【教你解析coredump】

1.      自己先在code里手动产生一个coredump,当音量调到51时，就会产生coredump

MSrv_SSSound.cpp

MAPI_U8 MSrv_SSSound::SetVolume(MAPI_U8 u8Vol)

{

   printf("----->>>>u8Vol3=%d\n",u8Vol);

    if(u8Vol == 51)

    {

       // U8* u8Pionter = NULL;

       printf("----->>>>Coredump jayden\n");

       // u8Pionter = 0;

        ASSERT(0);    //1106行

        

    }

}

2.      目前学习板子的coredump在var目录下面，

修改coredump在data目录下：

echo /data/%e.core.%p >/proc/sys/kernel/core_pattern

cat /proc/sys/kernel/core_pattern

3.      copy coredump.1075.gz到U盘里，并放入程录序编绎目：Y:\sourcecode\TVOS_L_928_3.0.5.a1\supernova\projects\symbols\applications\bin

解压：  gunzip./symbols/applications/bin/coredump.1075.gz

4. 进到projects的目录下执行

arm-none-linux-gnueabi-gdbsymbols/applications/bin/tvos

5.在gdb的debug環境下指向所模擬的路徑, 與所有so lib路徑

         set solib-absolute-prefixsymbols/

6.在gdb的debug环境

         (gdb)core symbols/applications/bin/coredump.1075

          bt         (back trace)

    => #0  0xb59ded5c in raise () from ./symbols/lib/libc.so.6

#1  0xb59e2838 inabort () from ./symbols/lib/libc.so.6

#2  0x00074238 inMSrv_SSSound::SetVolume (this=0xb5bb00fc <lock>, u8Vol=1 '\001',u8Vol@entry=51 '3')

    at./src/MSrv_SSSound.cpp:1106

#3  0x00074a9c inMSrv_SSSound::SetAudioVolume (this=<optimized out>,volSrcType=<optimized out>, u8Vol=<optimized out>)

    at./src/MSrv_SSSound.cpp:2559

#4  0x005581d4 inAudioManagerService::Client::setAudioVolume (this=0x12ad8a8, enSoundPath=0,volumn=51 '3')

    atAudioManagerService.cpp:280

#5  0x005729b8 inBnAudioManager:nTransact (this=0x12ad8a8, code=3, data=..., reply=0xbe8687c4,flags=16)

    atIAudioManager.cpp:1305

#6  0x000ceda8 inandroid::BBinder::transact (this=<optimized out>, code=3, data=...,reply=0xbe8687c4, flags=16)

    at../../../src/binder/Binder.cpp:108

#7  0x000c146c inandroid::IPCThreadState::executeCommand (this=this@entry=0x12a5df0,cmd=<optimized out>)

    at../../../src/binder/IPCThreadState.cpp:1084

#8  0x000c1b0c inandroid::IPCThreadState::getAndExecuteCommand (this=this@entry=0x12a5df0)

    at../../../src/binder/IPCThreadState.cpp:435

#9  0x000c1bd0 inandroid::IPCThreadState::joinThreadPool (this=0x12a5df0, isMain=<optimizedout>)

    at../../../src/binder/IPCThreadState.cpp:489

#10 0x00062884 in main (argc=1, argv=0xbe868ae4) atmain.cpp:1517

(gdb)

根据GDB分析出，/src/MSrv_SSSound.cpp:1106  MSrv_SSSound::SetAudioVolume里

也就是1106行的  ASSERT(0);    ，即断言！删掉即可！