Before setting a value for $a:
SV = NULL(0x0) at 0x8ecfa60
  REFCNT = 1
  FLAGS = ()

After setting a value for $a:
SV = PV(0x8ebe0c0) at 0x8ecfa60
  REFCNT = 1
  FLAGS = (POK,pPOK)
  PV = 0x8ed8618 "Test"\0
  CUR = 4
  LEN = 8

And $c is:
SV = PV(0x8ebe0d0) at 0x8edf228
  REFCNT = 1
  FLAGS = (POK,pPOK)
  PV = 0x8ed4b88 "Clobbered"\0
  CUR = 9
  LEN = 12

Globref *a is:
SV = PVGV(0x8ef2840) at 0x8ecfa50
  REFCNT = 10
  FLAGS = (MULTI)
  NAME = "a"
  NAMELEN = 1
  GvSTASH = 0x8ec0048	"main"
  GP = 0x8ed8c28
    SV = 0x8ecfa60
    REFCNT = 1
    IO = 0x0
    FORM = 0x0  
    AV = 0x0
    HV = 0x0
    CV = 0x0
    CVGEN = 0x0
    LINE = 8
    FILE = "./test.pl"
    FLAGS = 0x2
    EGV = 0x8ecfa50	"a"

After saving references \%tmp is:
SV = IV(0x8ec0e14) at 0x8ec0e18
  REFCNT = 1
  FLAGS = (TEMP,ROK)
  RV = 0x8f01bf8
  SV = PVHV(0x8ec5454) at 0x8f01bf8
    REFCNT = 2
    FLAGS = (PADMY,SHAREKEYS)
    ARRAY = 0x8ecf330  (0:6, 1:2)
    hash quality = 125.0%
    KEYS = 2
    FILL = 2
    MAX = 7
    RITER = -1
    EITER = 0x0
    Elt "a" HASH = 0xca2e9442
    SV = IV(0x8ec0e24) at 0x8ec0e28
      REFCNT = 1
      FLAGS = (ROK)
      RV = 0x8ecfa60
      SV = PV(0x8ebe0c0) at 0x8ecfa60
        REFCNT = 2
        FLAGS = (POK,pPOK)
        PV = 0x8ed8618 "Test"\0
        CUR = 4
        LEN = 8
    Elt "b" HASH = 0xdb819b
    SV = IV(0x8ec0e44) at 0x8ec0e48
      REFCNT = 1
      FLAGS = (ROK)
      RV = 0x8ecfa90
      SV = PV(0x8ebe0c8) at 0x8ecfa90
        REFCNT = 2
        FLAGS = (POK,pPOK)
        PV = 0x8ee98b8 "Unused"\0
        CUR = 6
        LEN = 8

After aliasing $a to $c, $a is:
SV = PV(0x8ebe0d0) at 0x8edf228
  REFCNT = 2
  FLAGS = (POK,pPOK)
  PV = 0x8ed4b88 "Clobbered"\0
  CUR = 9
  LEN = 12

After aliasing $a to $c, *a is:
SV = PVGV(0x8ef2840) at 0x8ecfa50
  REFCNT = 10
  FLAGS = (MULTI)
  NAME = "a"
  NAMELEN = 1
  GvSTASH = 0x8ec0048	"main"
  GP = 0x8ed8c28
    SV = 0x8edf228
    REFCNT = 1
    IO = 0x0
    FORM = 0x0  
    AV = 0x0
    HV = 0x0
    CV = 0x0
    CVGEN = 0x0
    LINE = 8
    FILE = "./test.pl"
    FLAGS = 0x2
    EGV = 0x8ecfa50	"a"

After restoring *a, *a is:
SV = PVGV(0x8ef2840) at 0x8ecfa50
  REFCNT = 10
  FLAGS = (MULTI)
  NAME = "a"
  NAMELEN = 1
  GvSTASH = 0x8ec0048	"main"
  GP = 0x8ed8c28
    SV = 0x8ecfa60
    REFCNT = 1
    IO = 0x0
    FORM = 0x0  
    AV = 0x0
    HV = 0x0
    CV = 0x0
    CVGEN = 0x0
    LINE = 8
    FILE = "./test.pl"
    FLAGS = 0x2
    EGV = 0x8ecfa50	"a"

Finally, $a is:
SV = PV(0x8ebe0c0) at 0x8ecfa60
  REFCNT = 1
  FLAGS = (POK,pPOK)
  PV = 0x8ed8618 "Test"\0
  CUR = 4
  LEN = 8