GDB ʹÓ×—Linux C±à³Ì
¼òÊö
Ò» ÁÐÎļþÇåµ¥
¶þ£ºÖ´ÐгÌÐò
Èý£ºÏÔʾÊý¾Ý
ËÄ£º¶Ïµã(breakpoint)
Î壮¶ÏµãµÄ¹ÜÀí
Áù£®±äÁ¿µÄ¼ì²éºÍ¸³Öµ
Æß. µ¥²½Ö´ÐÐ
°Ë£®º¯ÊýµÄµ÷ÓÃ
¾Å£®»úÆ÷ÓïÑÔ¹¤¾ß
Ê®£®ÐźÅ
GDBµÄʹÓ÷½·¨
¼òÊö
Ò» ÁÐÎļþÇåµ¥
* List
(gdb) list line1,line2
¶þ£ºÖ´ÐгÌÐò
ÒªÏëÔËÐÐ×¼±¸µ÷ÊԵijÌÐò£¬¿ÉʹÓÃrunÃüÁÔÚËüºóÃæ¿ÉÒÔ¸úËæ·¢¸ø¸Ã³ÌÐòµÄÈκβÎÊý£¬°üÀ¨±ê×¼ÊäÈëºÍ±ê×¼Êä³ö˵Ã÷·û(<ºÍ> )ºÍÍâ¿ÇͨÅä·û£¨*¡¢£¿¡¢[¡¢]£©ÔÚÄÚ¡£Èç¹ûÄãʹÓò»´ø²ÎÊýµÄrunÃüÁgdb¾ÍÔÙ´ÎʹÓÃÄã¸øÓèÇ°Ò»ÌõrunÃüÁîµÄ²ÎÊý£¬ÕâÊǺÜÓÐÓõġ£ÀûÓÃset args ÃüÁî¾Í¿ÉÒÔÐ޸ķ¢Ë͸ø³ÌÐòµÄ²ÎÊý£¬¶øʹÓÃshow args ÃüÁî¾Í¿ÉÒԲ鿴Æäȱʡ²ÎÊýµÄÁÐ±í¡£
£¨gdb£©set args –b –x
(gdb) show args
backtraceÃüÁîΪ¶ÑÕ»ÌṩÏòºó¸ú×Ù¹¦ÄÜ¡£
Backtrace ÃüÁî²úÉúÒ»ÕÅÁÐ±í£¬°üº¬×Å´Ó×î½üµÄ¹ý³Ì¿ªÊ¼µÄËùÒÔÓÐЧ¹ý³ÌºÍµ÷ÓÃÕâЩ¹ý³ÌµÄ²ÎÊý¡£
Èý£ºÏÔʾÊý¾Ý
* ÀûÓÃprint ÃüÁî¿ÉÒÔ¼ì²é¸÷¸ö±äÁ¿µÄÖµ¡£
(gdb) print p (pΪ±äÁ¿Ãû)
print ÊÇgdbµÄÒ»¸ö¹¦ÄܺÜÇ¿µÄÃüÁÀûÓÃËü¿ÉÒÔÏÔʾ±»µ÷ÊÔµÄÓïÑÔÖÐÈκÎÓÐЧµÄ±í´ïʽ¡£±í´ïʽ³ýÁË°üº¬Äã³ÌÐòÖеıäÁ¿Í⣬»¹¿ÉÒÔ°üº¬ÒÔÏÂÄÚÈÝ£º
1. ¶Ô³ÌÐòÖк¯ÊýµÄµ÷ÓÃ
(gdb) print find_entry(1,0)
2. Êý¾Ý½á¹¹ºÍÆäËû¸´ÔÓ¶ÔÏó
(gdb) print *table_start
$8={e=reference=’\000’,location=0x0,next=0x0}
3. ÖµµÄÀúÊ·³É·Ö
(gdb)print $1 ($1ΪÀúÊ·¼Ç¼±äÁ¿,ÔÚÒÔºó¿ÉÒÔÖ±½ÓÒýÓà $1 µÄÖµ)
4. ÈËΪÊý×é
ÈËΪÊý×éÌṩÁËÒ»ÖÖÈ¥ÏÔʾ´æ´¢Æ÷¿é£¨Êý×é½Ú»ò¶¯Ì¬·ÖÅäµÄ´æ´¢Çø£©ÄÚÈݵķ½·¨¡£ÔçÆڵĵ÷ÊÔ³ÌÐòûÓкܺõķ½·¨½«ÈÎÒâµÄÖ¸Õë»»³ÉÒ»¸öÊý×é¡£¾ÍÏñ¶Ô´ý²ÎÊýÒ»Ñù£¬ÈÃÎÒÃDz鿴ÄÚ´æÖÐÔÚ±äÁ¿hºóÃæµÄ10¸öÕûÊý£¬Ò»¸ö¶¯Ì¬Êý×éµÄÓï·¨ÈçÏÂËùʾ£º
b
Ïà¹ØÎĵµ£º
ÄÚ´æ·ÖÅ䷽ʽÓÐÈýÖÖ£º
£¨1£© ´Ó¾²Ì¬´æ´¢ÇøÓò·ÖÅä¡£ÄÚ´æÔÚ³ÌÐò±àÒëµÄʱºò¾ÍÒѾ·ÖÅäºÃ£¬Õâ¿éÄÚ´æÔÚ³ÌÐòµÄ
Õû¸öÔËÐÐÆڼ䶼´æÔÚ¡£ÀýÈçÈ«¾Ö±äÁ¿£¬static ±äÁ¿¡£
£¨2£© ÔÚÕ»ÉÏ´´½¨¡£ÔÚÖ´Ðк¯Êýʱ£¬º¯ÊýÄÚ¾Ö²¿±äÁ¿µÄ´æ´¢µ¥Ôª¶¼¿ÉÒÔÔÚÕ»ÉÏ´´½¨£¬º¯
ÊýÖ´ÐнáÊøʱÕâЩ´æ´¢µ¥Ôª×Ô¶¯±»ÊÍ·Å¡£Õ»ÄÚ´æ·ÖÅäÔËËãÄÚÖÃÓÚ´¦ÀíÆ÷µ ......
±àÕß°´:·Ç³£»ù±¾¹ØÓÚCÓïÑÔµÄÎÊÌâ,Ò»¸öÐÅÏ¢Àà(¼ÆËã»ú,×ÊѶ¹¤³Ì,µç×Ó¹¤³Ì, ͨÐÅ
¹¤³Ì)רҵµÄ±¾¿Æ±ÏÒµÉúÓ¦¸Ã´ïµ½µÄˮƽ¡£ÌâÄ¿²»ÄÑ,È«²¿¶¼ÄÜ¿ìËٵشðÍ꣬µ±È»Ò²ÐèÒª
Ò»¶¨µÄ֪ʶ´¢±¸¡£
¶ÔÓÚ´ó¶àÊýÈË£¬ÎÒÃÇÔ¤ÆÚÄã¿ÉÄÜ´ð´í 1) 4) 15)Ì⣬ËùÒÔ´ð´í3µÀÒÔÄڵģ¬ÎÒÃÇÈÏΪ
ÄãºÜ°ô
´ð´í5µÀÌâÒÔ ......
ÀýÒ»£º·¢ËÍSignaling Packet£º
Signaling CommandÊÇ2¸öBluetoothʵÌåÖ®¼äµÄL2CAP²ãÃüÁî´«Êä¡£ËùÒÔµÃSignaling CommandʹÓÃCID 0x0001.
¶à¸öCommand¿ÉÒÔÔÚÒ»¸öC-frame£¨control frame£©Öз¢ËÍ¡£
Èç¹ûÒªÖ±½Ó·¢ËÍSignaling Command.ÐèÒª½¨Á¢SOCK_RAWÀàÐ͵ÄL2CAPÁ¬½ÓSocket¡£ÕâÑù²ÅÓлú»á×Ô¼ºÌî³äCommand Code£¬Identi ......
¸Õ¿ªÊ¼½Ó´¥Linux,ÄÇô¶àµÄ°æ±¾,Õæ²»ÖªµÀ¸ÃÓÃʲôÑùµÄºÃ.¿´ÁËÍøÉϵÄÆÀÂÛ,¶¼ËµUbuntnºÃ.ÏÂÁËÒ»¸ö,ÔÚÐéÄâ»úÉÏ×°Á˼¸±é.·¢ÏÖµÚÒ»´Î°²×°µÄʱºòºÜ¿ì,ÒÔºó¾Í×Ü¿¨ÔÚAptÅäÖÃÄÇ,²»ÖªµÀÊÇΪʲô.
ºóÀ´,·¢ÏÖºìÆìLinux.µ«ÍøÉϵÄÆÀÂÛ¸÷Òì,²»¹ýÎÒ»¹ÊÇÑ¡ÔñÁ˺ìÆì.û±ðµÄÔÒò,¾ÍÒòΪËýÊÇÖйúµÄ.
¶ÔÓÚûÓÐÒ»µãLINUX¾ÑéµÄ³õѧÕß,±¾ÈËÈÏΪ»¹Ê ......
ÆäʵlinuxµÄºº»¯£¬ºÜ¼òµ¥
½øÈëÄãµÄxpϵͳÅÌ£¬È»ºó½øÈëwindows£¬½«ÄãµÄfontsÎļþ¼ÐÈ«²¿¸´ÖƵ½uÅÌÖУ¬½øÈëlinux£¬Ñ°ÕÒÄãµÄlinux×ÖÌåÔÚÄÇÀȻºó°ÑfontsµÄÄÚÈÝÈ«²¿¸´ÖƽøÈ¥
Èç¹û²»ÖªµÀlinuxµÄ×ÖÌåÔÚÄÄ£¿°´Èçϲ½Ö裺
½øÈëÖÕ¶Ë
ÊäÈë“locate £ª.ttf”£¨Èç¹ûlocate£¬²»ÄÜÓã¬ÊäÈë“updatedb”£¬»Ø³µ£¬µ ......