diff options
Diffstat (limited to 'fs/proc/task_mmu.c')
| -rw-r--r-- | fs/proc/task_mmu.c | 235 |
1 files changed, 235 insertions, 0 deletions
diff --git a/fs/proc/task_mmu.c b/fs/proc/task_mmu.c new file mode 100644 index 000000000000..28b4a0253a92 --- /dev/null +++ b/fs/proc/task_mmu.c @@ -0,0 +1,235 @@ +#include <linux/mm.h> +#include <linux/hugetlb.h> +#include <linux/mount.h> +#include <linux/seq_file.h> +#include <asm/elf.h> +#include <asm/uaccess.h> +#include "internal.h" + +char *task_mem(struct mm_struct *mm, char *buffer) +{ + unsigned long data, text, lib; + + data = mm->total_vm - mm->shared_vm - mm->stack_vm; + text = (PAGE_ALIGN(mm->end_code) - (mm->start_code & PAGE_MASK)) >> 10; + lib = (mm->exec_vm << (PAGE_SHIFT-10)) - text; + buffer += sprintf(buffer, + "VmSize:\t%8lu kB\n" + "VmLck:\t%8lu kB\n" + "VmRSS:\t%8lu kB\n" + "VmData:\t%8lu kB\n" + "VmStk:\t%8lu kB\n" + "VmExe:\t%8lu kB\n" + "VmLib:\t%8lu kB\n" + "VmPTE:\t%8lu kB\n", + (mm->total_vm - mm->reserved_vm) << (PAGE_SHIFT-10), + mm->locked_vm << (PAGE_SHIFT-10), + get_mm_counter(mm, rss) << (PAGE_SHIFT-10), + data << (PAGE_SHIFT-10), + mm->stack_vm << (PAGE_SHIFT-10), text, lib, + (PTRS_PER_PTE*sizeof(pte_t)*mm->nr_ptes) >> 10); + return buffer; +} + +unsigned long task_vsize(struct mm_struct *mm) +{ + return PAGE_SIZE * mm->total_vm; +} + +int task_statm(struct mm_struct *mm, int *shared, int *text, + int *data, int *resident) +{ + int rss = get_mm_counter(mm, rss); + + *shared = rss - get_mm_counter(mm, anon_rss); + *text = (PAGE_ALIGN(mm->end_code) - (mm->start_code & PAGE_MASK)) + >> PAGE_SHIFT; + *data = mm->total_vm - mm->shared_vm; + *resident = rss; + return mm->total_vm; +} + +int proc_exe_link(struct inode *inode, struct dentry **dentry, struct vfsmount **mnt) +{ + struct vm_area_struct * vma; + int result = -ENOENT; + struct task_struct *task = proc_task(inode); + struct mm_struct * mm = get_task_mm(task); + + if (!mm) + goto out; + down_read(&mm->mmap_sem); + + vma = mm->mmap; + while (vma) { + if ((vma->vm_flags & VM_EXECUTABLE) && vma->vm_file) + break; + vma = vma->vm_next; + } + + if (vma) { + *mnt = mntget(vma->vm_file->f_vfsmnt); + *dentry = dget(vma->vm_file->f_dentry); + result = 0; + } + + up_read(&mm->mmap_sem); + mmput(mm); +out: + return result; +} + +static void pad_len_spaces(struct seq_file *m, int len) +{ + len = 25 + sizeof(void*) * 6 - len; + if (len < 1) + len = 1; + seq_printf(m, "%*c", len, ' '); +} + +static int show_map(struct seq_file *m, void *v) +{ + struct task_struct *task = m->private; + struct vm_area_struct *map = v; + struct mm_struct *mm = map->vm_mm; + struct file *file = map->vm_file; + int flags = map->vm_flags; + unsigned long ino = 0; + dev_t dev = 0; + int len; + + if (file) { + struct inode *inode = map->vm_file->f_dentry->d_inode; + dev = inode->i_sb->s_dev; + ino = inode->i_ino; + } + + seq_printf(m, "%08lx-%08lx %c%c%c%c %08lx %02x:%02x %lu %n", + map->vm_start, + map->vm_end, + flags & VM_READ ? 'r' : '-', + flags & VM_WRITE ? 'w' : '-', + flags & VM_EXEC ? 'x' : '-', + flags & VM_MAYSHARE ? 's' : 'p', + map->vm_pgoff << PAGE_SHIFT, + MAJOR(dev), MINOR(dev), ino, &len); + + /* + * Print the dentry name for named mappings, and a + * special [heap] marker for the heap: + */ + if (map->vm_file) { + pad_len_spaces(m, len); + seq_path(m, file->f_vfsmnt, file->f_dentry, ""); + } else { + if (mm) { + if (map->vm_start <= mm->start_brk && + map->vm_end >= mm->brk) { + pad_len_spaces(m, len); + seq_puts(m, "[heap]"); + } else { + if (map->vm_start <= mm->start_stack && + map->vm_end >= mm->start_stack) { + + pad_len_spaces(m, len); + seq_puts(m, "[stack]"); + } + } + } else { + pad_len_spaces(m, len); + seq_puts(m, "[vdso]"); + } + } + seq_putc(m, '\n'); + if (m->count < m->size) /* map is copied successfully */ + m->version = (map != get_gate_vma(task))? map->vm_start: 0; + return 0; +} + +static void *m_start(struct seq_file *m, loff_t *pos) +{ + struct task_struct *task = m->private; + unsigned long last_addr = m->version; + struct mm_struct *mm; + struct vm_area_struct *map, *tail_map; + loff_t l = *pos; + + /* + * We remember last_addr rather than next_addr to hit with + * mmap_cache most of the time. We have zero last_addr at + * the begining and also after lseek. We will have -1 last_addr + * after the end of the maps. + */ + + if (last_addr == -1UL) + return NULL; + + mm = get_task_mm(task); + if (!mm) + return NULL; + + tail_map = get_gate_vma(task); + down_read(&mm->mmap_sem); + + /* Start with last addr hint */ + if (last_addr && (map = find_vma(mm, last_addr))) { + map = map->vm_next; + goto out; + } + + /* + * Check the map index is within the range and do + * sequential scan until m_index. + */ + map = NULL; + if ((unsigned long)l < mm->map_count) { + map = mm->mmap; + while (l-- && map) + map = map->vm_next; + goto out; + } + + if (l != mm->map_count) + tail_map = NULL; /* After gate map */ + +out: + if (map) + return map; + + /* End of maps has reached */ + m->version = (tail_map != NULL)? 0: -1UL; + up_read(&mm->mmap_sem); + mmput(mm); + return tail_map; +} + +static void m_stop(struct seq_file *m, void *v) +{ + struct task_struct *task = m->private; + struct vm_area_struct *map = v; + if (map && map != get_gate_vma(task)) { + struct mm_struct *mm = map->vm_mm; + up_read(&mm->mmap_sem); + mmput(mm); + } +} + +static void *m_next(struct seq_file *m, void *v, loff_t *pos) +{ + struct task_struct *task = m->private; + struct vm_area_struct *map = v; + struct vm_area_struct *tail_map = get_gate_vma(task); + + (*pos)++; + if (map && (map != tail_map) && map->vm_next) + return map->vm_next; + m_stop(m, v); + return (map != tail_map)? tail_map: NULL; +} + +struct seq_operations proc_pid_maps_op = { + .start = m_start, + .next = m_next, + .stop = m_stop, + .show = show_map +}; |