6614052: jhat fails to read heap dump > 2GB.
Summary: Modified the jhat code to use long for unsigned int. This is a forward port of changes from Kevin Walls.
Reviewed-by: jjh
cfeea66a3fa8ca3686a7cfa2d0ce8ab0169f168d jdk7-b24
cbc8ad9dd0e085a607427ea35411990982f19a36 jdk7-b25
9410f77cc30c604d1caf7c9fe3a57fa19e1acbe8 jdk7-b26
11b4dc9f2be3523ef989a0db8459eb56b3045c3a jdk7-b27
56652b46f328937f6b9b5130f1e4cd80f48868ef jdk7-b28
31e08f70e88d77c2053f91c21b49a04296bdc59a jdk7-b29
2dab2f712e1832c92acfa63ec0337048b9422c20 jdk7-b30
3300a35a0bd56d695b92fe0b34f03ebbfc939064 jdk7-b31
64da805be725721bf2004e7409a0d7a16fc8ddbc jdk7-b32