JDK-6798785 : Crash in OopFlow::build_oop_map: incorrect comparison of 64bit pointers
- Type: Bug
- Component: hotspot
- Sub-Component: compiler
- Affected Version: 5.0u14,6u6,6u12,6-pool,7-pool
- Priority: P3
- Status: Closed
- Resolution: Fixed
- OS: linux_redhat_5.2,solaris,solaris_10
- CPU: x86,sparc
- Submitted: 2009-01-28
- Updated: 2016-07-21
- Resolved: 2011-03-07
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| Other | Other | JDK 6 | JDK 7 | Other |
|---|---|---|---|---|
| 5.0u18-rev,hs11.3Fixed | 5.0u19Fixed | 6u13-revFixed | 7Fixed  |
hs11.3Fixed |
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Description
When defining a Dict you specify the compare and hash functions and Dict provides a couple useful default. In particular for pointers it provides this:
// Slimey cheap key comparator.
int32 cmpkey(const void *key1, const void *key2) {
return (int32)((intptr_t)key1 - (intptr_t)key2);
}
Unforturnately in 64-bit mode this throws away the high 32 bits of the pointer.
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