Method executeProcess

lab8/src/7/src/kernel/program.cpp:201–242

}

int ProgramManager::executeProcess(const char *filename, int priority)
{
    bool status = interruptManager.getInterruptStatus();
    interruptManager.disableInterrupt();

    // 在线程创建的基础上初步创建进程的PCB
    int pid = executeThread((ThreadFunction)load_process,
                            (void *)filename, filename, priority);
    if (pid == -1)
    {
        interruptManager.setInterruptStatus(status);
        return -1;
    }

    // 找到刚刚创建的PCB
    PCB *process = ListItem2PCB(allPrograms.back(), tagInAllList);

    // 创建进程的页目录表
    process->pageDirectoryAddress = createProcessPageDirectory();
    //printf("%x\n", process->pageDirectoryAddress);

    if (!process->pageDirectoryAddress)
    {
        process->status = ProgramStatus::DEAD;
        interruptManager.setInterruptStatus(status);
        return -1;
    }

    // 创建进程的虚拟地址池
    bool res = createUserVirtualPool(process);

    if (!res)
    {
        process->status = ProgramStatus::DEAD;
        interruptManager.setInterruptStatus(status);
        return -1;
    }

    interruptManager.setInterruptStatus(status);

    return pid;
}

int ProgramManager::createProcessPageDirectory()
{