JDK-6420685 : ResourceMark breaks growable array
- Type: Bug
- Component: hotspot
- Sub-Component: compiler
- Affected Version: 5.0u6
- Priority: P3
- Status: Resolved
- Resolution: Fixed
- OS: generic
- CPU: generic
- Submitted: 2006-05-02
- Updated: 2010-04-02
- Resolved: 2006-05-25
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| Other | Other | JDK 6 |
|---|---|---|
| 1.3.1_19Fixed | 1.4.2_13Fixed | 6 b85Fixed  |
Description
The ResourceMark shown here is new in 1.5.0_06. It is incorrect, in that calls to "get_ctrl" can call "_nodes.map" which is a growable array. If the array DOES grow here, the then new storage will be allocated inside the ResourceMark, and reclaimed on exit from get_late_ctrl, leaving the _nodes data structure dangling.
//------------------------------get_late_ctrl----------------------------------
// Compute latest legal control.
Node *PhaseIdealLoop::get_late_ctrl( Node *n, Node *early ) {
ResourceMark rm; // Temp allocation
assert(early != NULL, "early control should not be NULL");
Comments
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