Main HEAP and Thread HEAP

#include <stdio.h> #include <pthread.h> #include <stdlib.h> #include <unistd.h> #include <sys/types.h> //this Function pronounced, return value is void Pointer // use of one arguments is void pointer arg // void pointer means freedom return value. void* threadFunc(void *arg); int main(int argc, char*argv[]) { // thread  pthread_t t1; void *s; int ret; char *addr; // GET process ID printf("W3lcome to per thread arena example : %d\n",getpid() ); printf("Before malloc in main thread\n"); getchar(); // malloc 1000 byte addr = (char*)malloc(1000); printf("After malloc and before free in main thread\n"); getchar(); // free memory free(addr); // create freelist related in main printf("After free in main thread\n"); getchar(); // return value => pthread_create  // second arguments NULL means use of basic characteristic related thread. // third arguments -> threadFunc is use of Function by Thread  ret = pthread_create(&t1, NULL, threadFunc, NULL); // Let's Create threadFunc in related Thread. // IF return of ret is Zero -> this thread create succuess  // But, instead of Zero this thread cause by Error. if(ret) { printf("Thread Create Error Sorry!\n"); return -1; } // pthread_join means wait for Terminated about another thread.  ret = pthread_join(t1, &s); if(ret) { printf("Thread join Error\n"); return -1; } return 0; } void * threadFunc(void *arg) { // before, just malloc in main. // but now, malloc in Thread. printf("Before Malloc in thread\n"); getchar(); char *addr = (char*)malloc(1000); printf("After malloc and before free in Thread 1 \n"); getchar(); free(addr); // create freelist related in Thread 1 printf("After free in Thread 1 \n"); getchar(); }

오늘 알게 된 것 : pthread를 컴파일 할 때는 (32비트 기준)

gcc -o 바이너리 ./바이너리.c -m32 -lpthread