lunaix-os/scripts/gdb/lunadbg/region_dump.py

   1 import gdb
   2 from .utils import pid_argument
   3
   4 class MemoryRegionDump(gdb.Command):
   5     """Dump virtual memory regions associated with a process"""
   6     def __init__(self) -> None:
   7         super().__init__("vmrs", gdb.COMMAND_USER)
   8
   9     def invoke(self, argument: str, from_tty: bool) -> None:
  10         argument = pid_argument(argument)
  11
  12         pid = gdb.parse_and_eval(f"{argument}->pid")
  13
  14         argument = f"&{argument}->mm.regions"
  15         val = gdb.parse_and_eval(argument)
  16         head = val
  17
  18         region_t = gdb.lookup_type("struct mm_region").pointer()
  19
  20         print("VMRS (pid: %d)"%(pid))
  21
  22         i = 0
  23         while(val["next"] != head):
  24             region = val["next"].cast(region_t)
  25             print(f"VMR #{i}:")
  26             print( "  0x%x...0x%x [0x%x]"%(
  27                 region['start'], region['end'],
  28                 region['end'] - region['start']))
  29
  30             attr = region["attr"]
  31             attr_str = []
  32             if (attr & (1 << 2)):
  33                 attr_str.append("R")
  34             if (attr & (1 << 3)):
  35                 attr_str.append("W")
  36             if (attr & (1 << 4)):
  37                 attr_str.append("X")
  38             print( "  attr: 0x%x (%s)"%(attr, "".join(attr_str)))
  39
  40             file = region["mfile"]
  41             if file == 0:
  42                 print( "  anonymous region")
  43             else:
  44                 print( "  file mapped:")
  45                 print( "     dnode: %s @0x%x"%(file["dnode"]["name"]["value"].string(), file))
  46                 print( "     frange: 0x%x+0x%x"%(region["foff"], region["flen"]))
  47
  48             val = val["next"]
  49             i+=1