C++ new到底new什么

9: int *obj = new int(6);
00F714CE push 4 //压栈
00F714D0 call operator new (0F711EAh) //调用new函数返回分配的地址addr --- 0F711EAh是指令 jmp operator new 的地址
00F714D5 add esp,4 //恢复栈
00F714D8 mov dword ptr [ebp-0F8h],eax //把返回的地址addr赋给起始地址为ebp-0F8h的内存空间
00F714DE cmp dword ptr [ebp-0F8h],0 //判断分配是否成功
00F714E5 je main+51h (0F71501h)  //如果不成功跳往0x0F71501h   
00F714E7 mov eax,dword ptr [ebp-0F8h] //起始地址为ebp-0F8h 的内存空间（addr）赋值给eax
00F714ED mov dword ptr [eax],6 //把以起始地址为eax的内存空间(addr)置成6
00F714F3 mov ecx,dword ptr [ebp-0F8h] //起始地址为ebp-0F8h 的内存空间（addr）赋值给ecx
00F714F9 mov dword ptr [ebp-100h],ecx //ecx的值（addr）赋给起始地址为ebp-100h的内存空间
00F714FF jmp main+5Bh (0F7150Bh) //无条件跳转到0x0F7150B
00F71501 mov dword ptr [ebp-100h],0 //起始地址为ebp-100h的内存空间置为0---分配失败的情况
00F7150B mov edx,dword ptr [ebp-100h] //起始地址为ebp-100h的内存空间（addr）赋值给edx
00F71511 mov dword ptr [obj],edx  //把edx的内容（addr）赋值给obj为起始地址的内存空间a
10: delete obj;
00F71514 mov eax,dword ptr [obj]  //把obj为起始地址的内存空间送往eax
00F71517 mov dword ptr [ebp-0ECh],eax //eax送往以ebp-0ECh为起始地址的内存空间
00F7151D mov ecx,dword ptr [ebp-0ECh]  //以ebp-0ECh为起始地址的内存空间送往ecx
00F71523 push ecx //ecx压栈
00F71524 call operator delete (0F710A0h)
00F71529 add esp,4  
11:int *obj2 = new int(7);
与分配obj相同