C++ dup_mmap函数代码示例

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本文整理汇总了C++中dup_mmap函数的典型用法代码示例。如果您正苦于以下问题：C++ dup_mmap函数的具体用法？C++ dup_mmap怎么用？C++ dup_mmap使用的例子？那么恭喜您, 这里精选的函数代码示例或许可以为您提供帮助。

在下文中一共展示了dup_mmap函数的8个代码示例，这些例子默认根据受欢迎程度排序。您可以为喜欢或者感觉有用的代码点赞，您的评价将有助于我们的系统推荐出更棒的C++代码示例。

示例1: allocate_mm

/*
 * Allocate a new mm structure and copy contents from the
 * mm structure of the passed in task structure.
 */
static struct mm_struct *dup_mm(struct task_struct *tsk)
{
	struct mm_struct *mm, *oldmm = current->mm;
	int err;

	mm = allocate_mm();
	if (!mm)
		goto fail_nomem;

	memcpy(mm, oldmm, sizeof(*mm));

	if (!mm_init(mm, tsk))
		goto fail_nomem;

	err = dup_mmap(mm, oldmm);
	if (err)
		goto free_pt;

	mm->hiwater_rss = get_mm_rss(mm);
	mm->hiwater_vm = mm->total_vm;

	if (mm->binfmt && !try_module_get(mm->binfmt->module))
		goto free_pt;

	return mm;

free_pt:
	/* don't put binfmt in mmput, we haven't got module yet */
	mm->binfmt = NULL;
	mmput(mm);

fail_nomem:
	return NULL;
}

开发者ID:19Dan01，项目名称:linux，代码行数:38，代码来源:fork.c

示例2: allocate_mm

struct mm_struct *dup_mm(struct task_struct *tsk)
{
	struct mm_struct *mm, *oldmm = current->mm;
	int err;

	if (!oldmm)
		return NULL;

	mm = allocate_mm();
	if (!mm)
		goto fail_nomem;

	memcpy(mm, oldmm, sizeof(*mm));
	mm_init_cpumask(mm);

	
	mm->token_priority = 0;
	mm->last_interval = 0;

#ifdef CONFIG_TRANSPARENT_HUGEPAGE
	mm->pmd_huge_pte = NULL;
#endif

	if (!mm_init(mm, tsk))
		goto fail_nomem;

	if (init_new_context(tsk, mm))
		goto fail_nocontext;

	dup_mm_exe_file(oldmm, mm);

	err = dup_mmap(mm, oldmm);
	if (err)
		goto free_pt;

	mm->hiwater_rss = get_mm_rss(mm);
	mm->hiwater_vm = mm->total_vm;

	if (mm->binfmt && !try_module_get(mm->binfmt->module))
		goto free_pt;

	return mm;

free_pt:
	
	mm->binfmt = NULL;
	mmput(mm);

fail_nomem:
	return NULL;

fail_nocontext:
	mm_free_pgd(mm);
	free_mm(mm);
	return NULL;
}

开发者ID:Yannicked，项目名称:htc-m7，代码行数:56，代码来源:fork.c

示例3: copy_mm

// copy_mm - process "proc" duplicate OR share process "current"'s mm according clone_flags
//         - if clone_flags & CLONE_VM, then "share" ; else "duplicate"
static int
copy_mm(uint32_t clone_flags, struct proc_struct *proc) {
    struct mm_struct *mm, *oldmm = current->mm;

    /* current is a kernel thread */
    if (oldmm == NULL) {
        return 0;
    }
    if (clone_flags & CLONE_VM) {
        mm = oldmm;
        goto good_mm;
    }

    int ret = -E_NO_MEM;
    if ((mm = mm_create()) == NULL) {
        goto bad_mm;
    }
    if (setup_pgdir(mm) != 0) {
        goto bad_pgdir_cleanup_mm;
    }

    lock_mm(oldmm);
    {
        ret = dup_mmap(mm, oldmm);
    }
    unlock_mm(oldmm);

    if (ret != 0) {
        goto bad_dup_cleanup_mmap;
    }

good_mm:
    if (mm != oldmm) {
        mm->brk_start = oldmm->brk_start;
        mm->brk = oldmm->brk;
        bool intr_flag;
        local_intr_save(intr_flag);
        {
            list_add(&(proc_mm_list), &(mm->proc_mm_link));
        }
        local_intr_restore(intr_flag);
    }
    mm_count_inc(mm);
    proc->mm = mm;
	set_pgdir (proc, mm->pgdir);
    return 0;
bad_dup_cleanup_mmap:
    exit_mmap(mm);
    put_pgdir(mm);
bad_pgdir_cleanup_mm:
    mm_destroy(mm);
bad_mm:
    return ret;
}

开发者ID:chyyuu，项目名称:ucore-arch-arm，代码行数:56，代码来源:proc.c

示例4: allocate_mm

/*
 * Allocate a new mm structure and copy contents from the
 * mm structure of the passed in task structure.
 */
static struct mm_struct *dup_mm(struct task_struct *tsk)
{
	struct mm_struct *mm, *oldmm = current->mm;
	int err;

	if (!oldmm)
		return NULL;

	mm = allocate_mm();
	if (!mm)
		goto fail_nomem;

	memcpy(mm, oldmm, sizeof(*mm));

	if (!mm_init(mm))
		goto fail_nomem;

	if (init_new_context(tsk, mm))
		goto fail_nocontext;

	err = dup_mmap(mm, oldmm);
	if (err)
		goto free_pt;

	mm->hiwater_rss = get_mm_rss(mm);
	mm->hiwater_vm = mm->total_vm;

	return mm;

free_pt:
	mmput(mm);

fail_nomem:
	return NULL;

fail_nocontext:
	/*
	 * If init_new_context() failed, we cannot use mmput() to free the mm
	 * because it calls destroy_context()
	 */
	mm_free_pgd(mm);
	free_mm(mm);
	return NULL;
}

开发者ID:FatSunHYS，项目名称:OSCourseDesign，代码行数:48，代码来源:fork.c

示例5: copy_mm

static int copy_mm(unsigned long clone_flags, struct task_struct * tsk)
{
	struct mm_struct * mm, *oldmm;
	int retval;

	tsk->min_flt = tsk->maj_flt = 0;
	tsk->nvcsw = tsk->nivcsw = 0;

	tsk->mm = NULL;
	tsk->active_mm = NULL;

	/*
	 * Are we cloning a kernel thread?
	 *
	 * We need to steal a active VM for that..
	 */
	oldmm = current->mm;
	if (!oldmm)
		return 0;

	if (clone_flags & CLONE_VM) {
		atomic_inc(&oldmm->mm_users);
		mm = oldmm;
		/*
		 * There are cases where the PTL is held to ensure no
		 * new threads start up in user mode using an mm, which
		 * allows optimizing out ipis; the tlb_gather_mmu code
		 * is an example.
		 */
		spin_unlock_wait(&oldmm->page_table_lock);
		goto good_mm;
	}

	retval = -ENOMEM;
	mm = allocate_mm();
	if (!mm)
		goto fail_nomem;

	/* Copy the current MM stuff.. */
	memcpy(mm, oldmm, sizeof(*mm));
	if (!mm_init(mm))
		goto fail_nomem;

	if (init_new_context(tsk,mm))
		goto fail_nocontext;

	retval = dup_mmap(mm, oldmm);
	if (retval)
		goto free_pt;

	mm->hiwater_rss = mm->rss;
	mm->hiwater_vm = mm->total_vm;

good_mm:
	tsk->mm = mm;
	tsk->active_mm = mm;
	return 0;

free_pt:
	mmput(mm);
fail_nomem:
	return retval;

fail_nocontext:
	/*
	 * If init_new_context() failed, we cannot use mmput() to free the mm
	 * because it calls destroy_context()
	 */
	mm_free_pgd(mm);
	free_mm(mm);
	return retval;
}

开发者ID:Antonio-Zhou，项目名称:Linux-2.6.11，代码行数:72，代码来源:fork.c

示例6: check_mm_swap


//.........这里部分代码省略.........
    assert(ret == 0);

    for (i = 0, addr1 = addr0; i < 4; i ++, addr1 += PGSIZE) {
        *(char *)addr1 = (char)0xFF;
    }

    exit_mmap(mm0);
    for (i = 0; i < PDX(KERNBASE); i ++) {
        assert(pgdir[i] == 0);
    }

    cprintf("check_mm_swap: step3, exit_mmap ok.\n");

    // step4: check dup_mmap

    for (i = 0; i < max_swap_offset; i ++) {
        assert(mem_map[i] == SWAP_UNUSED);
    }

    ret = mm_map(mm0, addr0, PTSIZE, vm_flags, NULL);
    assert(ret != 0);

    addr1 = addr0;
    for (i = 0; i < 4; i ++, addr1 += PGSIZE) {
        *(char *)addr1 = (char)(i * i);
    }

    ret = 0;
    ret += swap_out_mm(mm0, 10);
    ret += swap_out_mm(mm0, 10);
    assert(ret == 4);

    for (; i < 8; i ++, addr1 += PGSIZE) {
        *(char *)addr1 = (char)(i * i);
    }

    // setup mm1

    mm1 = mm_create();
    assert(mm1 != NULL);

    page = alloc_page();
    assert(page != NULL);
    pgdir = page2kva(page);
    memcpy(pgdir, boot_pgdir, PGSIZE);
    pgdir[PDX(VPT)] = PADDR(pgdir) | PTE_P | PTE_W;
    mm1->pgdir = pgdir;

    ret = dup_mmap(mm1, mm0);
    assert(ret == 0);

    // switch to mm1

    check_mm_struct = mm1;
    lcr3(PADDR(mm1->pgdir));

    addr1 = addr0;
    for (i = 0; i < 8; i ++, addr1 += PGSIZE) {
        assert(*(char *)addr1 == (char)(i * i));
        *(char *)addr1 = (char)0x88;
    }

    // switch to mm0

    check_mm_struct = mm0;
    lcr3(PADDR(mm0->pgdir));

    addr1 = addr0;
    for (i = 0; i < 8; i ++, addr1 += PGSIZE) {
        assert(*(char *)addr1 == (char)(i * i));
    }

    // switch to boot_cr3

    check_mm_struct = NULL;
    lcr3(boot_cr3);

    // free memory

    exit_mmap(mm0);
    exit_mmap(mm1);

    free_page(kva2page(mm0->pgdir));
    mm_destroy(mm0);
    free_page(kva2page(mm1->pgdir));
    mm_destroy(mm1);

    cprintf("check_mm_swap: step4, dup_mmap ok.\n");

    refill_inactive_scan();
    page_launder();
    for (i = 0; i < max_swap_offset; i ++) {
        assert(mem_map[i] == SWAP_UNUSED);
    }

    assert(nr_free_pages_store == nr_free_pages());
    assert(slab_allocated_store == slab_allocated());

    cprintf("check_mm_swap() succeeded.\n");
}

开发者ID:jefjin，项目名称:ucore，代码行数:101，代码来源:swap.c

示例7: check_mm_shm_swap


//.........这里部分代码省略.........
    }
    for (i = 0; i < 4; i ++) {
        assert(*(char *)(addr1 + i * PGSIZE) == (char)(- i * i));
    }

    // check swap

    ret = swap_out_mm(mm0, 8) + swap_out_mm(mm0, 8);
    assert(ret == 8 && nr_active_pages == 4 && nr_inactive_pages == 0);

    refill_inactive_scan();
    assert(nr_active_pages == 0 && nr_inactive_pages == 4);

    // write & read again

    memset((void *)addr0, 0x77, PGSIZE);
    for (i = 0; i < PGSIZE; i ++) {
        assert(*(char *)(addr1 + i) == (char)0x77);
    }

    // check unmap

    ret = mm_unmap(mm0, addr1, PGSIZE * 4);
    assert(ret == 0);

    addr0 += 4 * PGSIZE, addr1 += 4 * PGSIZE;
    *(char *)(addr0) = (char)(0xDC);
    assert(*(char *)(addr1) == (char)(0xDC));
    *(char *)(addr1 + PTSIZE) = (char)(0xDC);
    assert(*(char *)(addr0 + PTSIZE) == (char)(0xDC));

    cprintf("check_mm_shm_swap: step1, share memory ok.\n");

    // setup mm1

    mm1 = mm_create();
    assert(mm1 != NULL);


    page = alloc_page();
    assert(page != NULL);
    pgdir = page2kva(page);
    memcpy(pgdir, boot_pgdir, PGSIZE);
    pgdir[PDX(VPT)] = PADDR(pgdir) | PTE_P | PTE_W;
    mm1->pgdir = pgdir;


    ret = dup_mmap(mm1, mm0);
    assert(ret == 0 && shmem_ref(shmem) == 4);

    // switch to mm1

    check_mm_struct = mm1;
    lcr3(PADDR(mm1->pgdir));

    for (i = 0; i < 4; i ++) {
        *(char *)(addr0 + i * PGSIZE) = (char)(0x57 + i);
    }
    for (i = 0; i < 4; i ++) {
        assert(*(char *)(addr1 + i * PGSIZE) == (char)(0x57 + i));
    }

    check_mm_struct = mm0;
    lcr3(PADDR(mm0->pgdir));

    for (i = 0; i < 4; i ++) {
        assert(*(char *)(addr0 + i * PGSIZE) == (char)(0x57 + i));
        assert(*(char *)(addr1 + i * PGSIZE) == (char)(0x57 + i));
    }

    swap_out_mm(mm1, 4);
    exit_mmap(mm1);

    free_page(kva2page(mm1->pgdir));
    mm_destroy(mm1);

    assert(shmem_ref(shmem) == 2);

    cprintf("check_mm_shm_swap: step2, dup_mmap ok.\n");

    // free memory

    check_mm_struct = NULL;
    lcr3(boot_cr3);

    exit_mmap(mm0);
    free_page(kva2page(mm0->pgdir));
    mm_destroy(mm0);

    refill_inactive_scan();
    page_launder();
    for (i = 0; i < max_swap_offset; i ++) {
        assert(mem_map[i] == SWAP_UNUSED);
    }

    assert(nr_free_pages_store == nr_free_pages());
    assert(slab_allocated_store == slab_allocated());

    cprintf("check_mm_shm_swap() succeeded.\n");
}

开发者ID:jefjin，项目名称:ucore，代码行数:101，代码来源:swap.c

示例8: allocate_mm

/*
 * Allocate a new mm structure and copy contents from the
 * mm structure of the passed in task structure.
 */
struct mm_struct *dup_mm(struct task_struct *tsk)
{
	struct mm_struct *mm, *oldmm = current->mm;
	int err;

	if (!oldmm)
		return NULL;

	mm = allocate_mm();
	if (!mm)
		goto fail_nomem;

	memcpy(mm, oldmm, sizeof(*mm));
	mm_init_cpumask(mm);

	/* Initializing for Swap token stuff */
	mm->token_priority = 0;
	mm->last_interval = 0;

#ifdef CONFIG_TRANSPARENT_HUGEPAGE
	mm->pmd_huge_pte = NULL;
#endif
	uprobe_reset_state(mm);

	if (!mm_init(mm, tsk))
		goto fail_nomem;

	if (init_new_context(tsk, mm))
		goto fail_nocontext;

	dup_mm_exe_file(oldmm, mm);

	err = dup_mmap(mm, oldmm);
	if (err)
		goto free_pt;

#ifdef CONFIG_HOMECACHE
	{
		/* Reset vm_pid on all vmas.  In the new mm_struct, we
		 * want to switch anything that was associated with
		 * the parent to be associated with the child, and
		 * clear everything else.
		 */
		struct vm_area_struct *mpnt;
		down_write_nested(&mm->mmap_sem, SINGLE_DEPTH_NESTING);
		for (mpnt = mm->mmap; mpnt; mpnt = mpnt->vm_next) {
			if (mpnt->vm_pid == current->pid)
				mpnt->vm_pid = tsk->pid;
			else
				mpnt->vm_pid = 0;
		}
		up_write(&mm->mmap_sem);
	}
#endif

	mm->hiwater_rss = get_mm_rss(mm);
	mm->hiwater_vm = mm->total_vm;

	if (mm->binfmt && !try_module_get(mm->binfmt->module))
		goto free_pt;

	return mm;

free_pt:
	/* don't put binfmt in mmput, we haven't got module yet */
	mm->binfmt = NULL;
	mmput(mm);

fail_nomem:
	return NULL;

fail_nocontext:
	/*
	 * If init_new_context() failed, we cannot use mmput() to free the mm
	 * because it calls destroy_context()
	 */
	mm_free_pgd(mm);
	free_mm(mm);
	return NULL;
}

开发者ID:tcreech，项目名称:tilegx-linux-3.4.68-politestackrehome，代码行数:84，代码来源:fork.c

注：本文中的dup_mmap函数示例由纯净天空整理自Github/MSDocs等源码及文档管理平台，相关代码片段筛选自各路编程大神贡献的开源项目，源码版权归原作者所有，传播和使用请参考对应项目的License；未经允许，请勿转载。