Adding upstream version 16.2.upstream/16.2

Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>

1 files changed, 29 insertions, 0 deletions

diff --git a/src/test/regress/sql/infinite_recurse.sql b/src/test/regress/sql/infinite_recurse.sql
new file mode 100644
index 0000000..151dba4
--- /dev/null
+++ b/src/test/regress/sql/infinite_recurse.sql
@@ -0,0 +1,29 @@
+-- Check that stack depth detection mechanism works and
+-- max_stack_depth is not set too high.
+
+create function infinite_recurse() returns int as
+'select infinite_recurse()' language sql;
+
+-- Unfortunately, up till mid 2020 the Linux kernel had a bug in PPC64
+-- signal handling that would cause this test to crash if it happened
+-- to receive an sinval catchup interrupt while the stack is deep:
+-- https://bugzilla.kernel.org/show_bug.cgi?id=205183
+-- It is likely to be many years before that bug disappears from all
+-- production kernels, so disable this test on such platforms.
+-- (We still create the function, so as not to have a cross-platform
+-- difference in the end state of the regression database.)
+
+SELECT version() ~ 'powerpc64[^,]*-linux-gnu'
+       AS skip_test \gset
+\if :skip_test
+\quit
+\endif
+
+-- The full error report is not very stable, so we show only SQLSTATE
+-- and primary error message.
+
+\set VERBOSITY sqlstate
+
+select infinite_recurse();
+
+\echo :LAST_ERROR_MESSAGE