我有一个函数可以计算一个单词在文件中出现的次数。现在由于某种原因它得到堆栈粉碎检测到错误,我没有看到错误。
这是代码:
int contar_palabra(const char *nombre_file, const char *palabra){
/*variables locales*/
FILE *file;
char buffer[50];
int bytes_leidos, contador = 0, comparar, cerrar, i;
/*Abrimos el archivo para lectura*/
file = fopen(nombre_file, "r");
/*Verificamos que se haya abierto correctamente*/
if (file == NULL){
printf("No se pudo abrir el archivo \n");
perror(nombre_file);
exit(EXIT_FAILURE);
}
/*Procedemos a contar cuantas veces aparece una palabra*/
while (!feof(file)){
bytes_leidos = fscanf(file, "%s", buffer);
if (bytes_leidos > 0){
/*Hacemos la comparacion*/
comparar = strcmp(buffer, palabra);
if (comparar == 0)
contador++;
}
else if(errno == EOF)
printf("Error al leer alguna palabra de %s \n", nombre_file);
else if (bytes_leidos == EOF)
break;
}
cerrar = fclose(file);
if(cerrar == EOF){
printf("Error: no se pudo cerra el archivo.");
}
printf("antes de retornar contador \n");
return contador;
}
我使用 valgrind 试图识别错误,日志文件给了我这个:
==2252== Memcheck, a memory error detector
==2252== Copyright (C) 2002-2010, and GNU GPL'd, by Julian Seward et al.
==2252== Using Valgrind-3.6.1 and LibVEX; rerun with -h for copyright info
==2252== Command: ./pargrep viejo.txt
==2252== Parent PID: 1756
==2252==
==2252==
==2252== HEAP SUMMARY:
==2252== in use at exit: 55 bytes in 1 blocks
==2252== total heap usage: 7 allocs, 6 frees, 1,389 bytes allocated
==2252==
==2252== 55 bytes in 1 blocks are still reachable in loss record 1 of 1
==2252== at 0x4026864: malloc (vg_replace_malloc.c:236)
==2252== by 0x40B878B: __libc_message (libc_fatal.c:138)
==2252== by 0x413D09F: __fortify_fail (fortify_fail.c:32)
==2252== by 0x413D049: __stack_chk_fail (stack_chk_fail.c:29)
==2252== by 0x8049142: contar_palabra (in /home/alessandro/OS/Proyecto2/prueba1.0/pargrep)
==2252== by 0x80489D4: main (in /home/alessandro/OS/Proyecto2/prueba1.0/pargrep)
==2252==
==2252== LEAK SUMMARY:
==2252== definitely lost: 0 bytes in 0 blocks
==2252== indirectly lost: 0 bytes in 0 blocks
==2252== possibly lost: 0 bytes in 0 blocks
==2252== still reachable: 55 bytes in 1 blocks
==2252== suppressed: 0 bytes in 0 blocks
==2252==
==2252== For counts of detected and suppressed errors, rerun with: -v
==2252== ERROR SUMMARY: 0 errors from 0 contexts (suppressed: 15 from 8)
奇怪的是它在返回之前打印了一条消息。我真的没有看到错误,感谢帮助。提前致谢