Hello All, I am trying to create my own library of threads. I got stuck with segmentation fault.. I need your help wuth this.. here is a code snippet... < file mthread.c > #include "mythread.h" #include <malloc.h> #include <stdio.h> #define FIBER_STACK 2048 mythread_t T1; int mythread_create(mythread_t *new_thread_ID, mythread_attr_t *attr, void * (*start_func)(void *), void *arg) { // Get the current execution context mythread_t t2 ; t2 = (mythread_t)new_thread_ID; getcontext(&t2->context); // Modify the context to a new stack t2->context.uc_stack.ss_sp = malloc( SIGSTKSZ ); t2->context.uc_stack.ss_size = 2048 ; t2->context.uc_stack.ss_flags = 0; if ( t2->context.uc_stack.ss_sp == 0 ) { perror( "malloc: Could not allocate stack" ); return 0; } // Create the new context printf( "\n Creating child fiber" ); fflush(stdout); makecontext(&t2->context,(void (*)())start_func,0); } void * display() { printf ("\n Hello \n"); fflush(stdout); } int main() { mythread_t t1; mythread_create(&t1,NULL,display,NULL); printf("\n thread creates \n"); fflush(stdout); return 0; } <End of code > The problem i get is a segmentation fault because of the highlighted lines ( in red). Code gets compiled and linked successfully. On execution , i get the desired o/p but at the end it does give a segmentation fault. Please comment.
