Thread in linux
pthread对应的系统调用mmap2(NULL, 10489856, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0xb75cc000mprotect(0xb75cc000, 4096, PROT_NONE) = 0clone(child_stack=0xb7fcc4b4, flags=CLONE_VM|CL