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The region allocator marks freed regions "Condemned" before actually freeing them. Condemned regions are associated with a transaction; before they can be reused / coalesced the transaction that condemned them must complete. The region allocator used "TisActiveTransaction(xid)" to determine whether a given transaction had completed. The problem is that Stasis now reuses transaction id's, and condemned regions were never reclaimed in practice. A transaction fingerprint is a unique identifier (currently transaction id, rec_lsn) that can be used to distinguish transactions that did not execute concurrently. I considered an alternative design based upon end-of-transaction actions. This would have worked as well, but would have been a more invasive change. |
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| .. | ||
| 2pc | ||
| cht | ||
| dfa | ||
| lladd-old | ||
| messages | ||
| monotree | ||
| pobj | ||
| stasis | ||
| .cvsignore | ||
| check_check.c | ||
| check_impl.h | ||
| check_includes.h | ||
| check_setup.h | ||
| CMakeLists.txt | ||
| Makefile.am | ||
| README.coredumps | ||
To obtain a coredump from a test that crashes, run this command: export CK_FORK=no This will prevent check from forking on each test, so that you can obtain a normal core dump.