mirror of
https://github.com/JakeHillion/drgn.git
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58 lines
1.6 KiB
Python
58 lines
1.6 KiB
Python
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#!/usr/bin/env drgn
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# Copyright (c) SUSE Linux.
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# SPDX-License-Identifier: LGPL-2.1-or-later
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"""Print memory map of a given task."""
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import os
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import sys
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from drgn.helpers.linux.device import MAJOR, MINOR
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from drgn.helpers.linux.fs import d_path
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from drgn.helpers.linux.pid import find_task
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if len(sys.argv) != 2:
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sys.exit("Usage: ./vmmap.py PID")
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pid = int(sys.argv[1])
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task = find_task(prog, int(pid))
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if not task:
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sys.exit(f"Cannot find task {pid}")
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try:
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vma = task.mm.mmap
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except AttributeError:
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sys.exit('maple tree VMA mmap is not supported yet (v6.1+)')
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FLAGS = ((0x1, "r"), (0x2, "w"), (0x4, "x"))
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PAGE_SHIFT = prog["PAGE_SHIFT"]
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print("Start End Flgs Offset Dev Inode File path")
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# Starting with 763ecb035029f500d7e6d ("mm: remove the vma linked list") (in v6.1),
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# the VMA mmap linked list is replaced with maple tree which is not supported right now:
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# https://github.com/osandov/drgn/issues/261
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while vma:
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flags = "".join([v if f & vma.vm_flags else "-" for f, v in FLAGS])
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flags += "s" if vma.vm_flags & 0x8 else "p"
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print(f"{vma.vm_start.value_():0x}-{vma.vm_end.value_():0x} {flags} ",
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end="")
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vmfile = vma.vm_file
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if vmfile:
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inode = vmfile.f_inode.i_ino.value_()
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dev = vmfile.f_inode.i_sb.s_dev
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major, minor = MAJOR(dev), MINOR(dev)
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path = os.fsdecode(d_path(vmfile.f_path))
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pgoff = (vma.vm_pgoff << PAGE_SHIFT).value_()
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else:
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inode = 0
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major, minor = 0, 0
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path = ""
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pgoff = 0
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print(f"{pgoff:08x} {major:02x}:{minor:02x} {inode:<16} {path}")
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vma = vma.vm_next
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