I can open my so file successfully by calling dlopen directly in my main function. But if I fork a child process, and call dlopen in child process, it failed!
I don't know why. Following is my code:
#include <stdio.h>
#include <errno.h>
#include <dlfcn.h>
void childFunc(void)
{
void *handle;
handle = dlopen("mytrd.so", RTLD_LAZY);
if( handle == NULL )
{
printf("errno[%d], errmsg[%s]\n", errno, dlerror());
return;
}
dlclose(handle);
}
void main(void)
{
int ret;
/* childFunc(); call directly, dlopen will success.*/
ret = fork();
if( ret == 0 )
{
childFunc(); /* dlopen will fail */
return;
}
else if( ret == -1 )
{
perror("fork");
retrun;
}
else
{
waitpid(ret);
}
}
Can anyone tell me why this happened? Is that a bug of Aix5.2 or there is anything wrong with my so file??The errmsg is "Bad address", the errno is 14.
problem solved!