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GNU µ÷ÊÔÆ÷¼ò½é
×÷Õß:David Seager
Linux µÄ´ó²¿·ÖÌØÉ«Ô´×ÔÓÚ shell µÄ GNU µ÷ÊÔÆ÷£¬Ò²³Æ×÷ gdb¡£gdb ¿ÉÒÔÈÃÄú²é¿´³ÌÐòµÄÄÚ²¿½á¹¹¡¢´òÓ¡±äÁ¿Öµ¡¢ÉèÖöϵ㣬ÒÔ¼°µ¥²½µ÷ÊÔÔ´´úÂë¡£ËüÊǹ¦Äܼ«ÆäÇ¿´óµÄ¹¤¾ß£¬ÊÊÓÃÓÚÐÞ¸´³ÌÐò´úÂëÖеÄÎÊÌâ¡£ÔÚ±¾ÎÄÖУ¬ÎÒ½«³¢ÊÔ˵Ã÷ gdb Óжà°ô£¬¶àʵÓá£
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gcc -g eg.c -o eg
ÔËÐÐ gdb
ÔÚ shell ÖУ¬¿ÉÒÔʹÓà gdb ÃüÁî²¢Ö¸¶¨³ÌÐòÃû×÷Ϊ²ÎÊýÀ´ÔËÐÐ gdb£¬ÀýÈç gdb eg£»»òÕßÔÚ gdb ÖУ¬¿ÉÒÔʹÓà file ÃüÁîÀ´×°ÈëÒªµ÷ÊԵijÌÐò£¬ÀýÈç file eg¡£ÕâÁ½ÖÖ·½Ê½¶¼¼ÙÉèÄúÊÇÔÚ°üº¬³ÌÐòµÄĿ¼ÖÐÖ´ÐÐÃüÁî¡£×°Èë³ÌÐòÖ®ºó£¬¿ÉÒÔÓà gdb ÃüÁî un À´Æô¶¯³ÌÐò¡£
µ÷ÊԻỰʾÀý
Èç¹ûÒ»ÇÐÕý³££¬³ÌÐò½«Ö´Ðе½½áÊø£¬´Ëʱ gdb ½«ÖØÐ»ñµÃ¿ØÖÆ¡£µ«Èç¹ûÓдíÎ󽫻áÔõôÑù£¿ÕâÖÖÇé¿öÏ£¬gdb »á»ñµÃ¿ØÖƲ¢ÖжϳÌÐò£¬´Ó¶ø¿ÉÒÔÈÃÄú¼ì²éËùÓÐÊÂÎïµÄ״̬£¬Èç¹ûÔËÆøºÃµÄ»°£¬¿ÉÒÔÕÒ³öÔ­Òò¡£ÎªÁËÒý·¢ÕâÖÖÇé¿ö£¬ÎÒÃǽ«Ê¹ÓÃÒ»¸öʾÀý³ÌÐò£º
´úÂëʾÀý eg1.c
#include
int wib(int no1, int no2)
{
int result, diff;
diff = no1 - no2;
result = no1 / diff;
return result;
}
int main(int argc, char *argv[])
{
int value, div, result, i, total;
value = 10;
div = 6;
total = 0;
for(i = 0; i < 10; i++)
{
result = wib(value, div);
total += result;
div++;
value--;
}
printf("%d wibed by %d equals %dn", value, div, total);
return 0;
}
Õâ¸ö³ÌÐò½«ÔËÐÐ 10 ´Î for Ñ­»·£¬Ê¹Óà wib() º¯Êý¼ÆËã³öÀÛ»ýÖµ£¬×îºó´òÓ¡³ö½á¹û¡£
ÔÚÄúϲ»¶µÄÎı¾±à¼­Æ÷ÖÐÊäÈëÕâ¸ö³ÌÐò£¨Òª±£³ÖÏàͬµÄÐоࣩ£¬±£´æÎª eg1.c£¬Ê¹Óà gcc -g eg1.c -o eg1 ½øÐбàÒ룬²¢Óà gdb eg1 Æô¶¯ gdb¡£Ê¹Óà un ÔËÐгÌÐò¿ÉÄÜ»á²úÉúÒÔÏÂÏûÏ¢£º
Program received signal SIGFPE, Arithmetic exception.
0x80483ea in wib (no1=8, no2=8) at eg1.c:7
7 result = no1 / diff;
(gdb)
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