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base repository: postgresql-cfbot/postgresql
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base: cf/5995~1
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head repository: postgresql-cfbot/postgresql
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compare: cf/5995
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  • 2 commits
  • 2 files changed
  • 2 contributors

Commits on Aug 31, 2025

  1. Fix EXEC_BACKEND segfault on NamedLWLockTrancheRequestArray access 

    Unlike fork(), EXEC_BACKEND did not pass NamedLWLockTrancheRequestArray
down to backends. This caused crashes if backends accessed the array,
such as in GetNamedLWLockTranche.

This patch fixes the issue by adding a num_lwlocks field to the shared
memory NamedLWLockTrancheArray, with the postmaster copying the value
from NamedLWLockTrancheRequestArray. GetNamedLWLockTranche now looks up
the LWLock from NamedLWLockTrancheArray instead.

NamedLWLockTrancheArray already points to shared memory and is passed
down to backends in launch_backend.c. NamedLWLockTrancheRequests still
acts as the counter for both arrays and is already handled in
EXEC_BACKEND, so no further changes are needed there.

This issue was discovered during testing of nearby code. No reports have
been seen in the field, so backpatching is not required.
    Ubuntu authored and Commitfest Bot committed Aug 31, 2025
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  2. [CF 5995] GetNamedLWLockTranche crashes on Windows in normal backend 

    This branch was automatically generated by a robot using patches from an
email thread registered at:

https://commitfest.postgresql.org/patch/5995

The branch will be overwritten each time a new patch version is posted to
the thread, and also periodically to check for bitrot caused by changes
on the master branch.

Patch(es): https://www.postgresql.org/message-id/CAA5RZ0tUApqNpYbRq9dtWZZyWd8FhJxxjOLbU8yso=opJMuHtQ@mail.gmail.com
Author(s): Sami Imseih
    Commitfest Bot committed Aug 31, 2025
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    5f23105 View commit details
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