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Commit16ee6ea

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Make src/test/recovery/t/017_shm.pl safe for concurrent execution.
Buildfarm members idiacanthus and komodoensis, which share a host, bothexecuted this test in the same second. That failed. Back-patch to 9.6,where the test first appeared.Discussion:https://postgr.es/m/20190404020543.GA1319573@rfd.leadboat.com
1 parent92c7602 commit16ee6ea

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‎src/test/recovery/t/017_shm.pl

Lines changed: 28 additions & 5 deletions
Original file line numberDiff line numberDiff line change
@@ -13,11 +13,6 @@
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my$tempdir = TestLib::tempdir;
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my$port;
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# When using Unix sockets, we can dictate the port number. In the absence of
17-
# collisions from other shmget() activity, gnat starts with key 0x7d001
18-
# (512001), and flea starts with key 0x7d002 (512002).
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$port = 512unless$PostgresNode::use_tcp;
20-
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# Log "ipcs" diffs on a best-effort basis, swallowing any error.
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my$ipcs_before ="$tempdir/ipcs_before";
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eval { run_log ['ipcs','-am' ],'>',$ipcs_before; };
@@ -28,6 +23,33 @@ sub log_ipcs
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return;
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}
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# With Unix sockets, choose a port number such that the port number's first
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# IpcMemoryKey candidate is available. If multiple copies of this test run
28+
# concurrently, they will pick different ports. In the absence of collisions
29+
# from other shmget() activity, gnat starts with key 0x7d001 (512001), and
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# flea starts with key 0x7d002 (512002). With TCP, the first get_new_node
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# picks a port number.
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my$port_holder;
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if (!$PostgresNode::use_tcp)
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{
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for ($port = 512;$port < 612; ++$port)
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{
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$port_holder = PostgresNode->get_new_node(
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"port${port}_holder",
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port=>$port,
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own_host=> 1);
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$port_holder->init;
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$port_holder->start;
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# Match the AddToDataDirLockFile() call in sysv_shmem.c. Assume all
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# systems not using sysv_shmem.c do use TCP.
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my$shmem_key_line_prefix =sprintf("%9lu", 1 +$port * 1000);
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last
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if slurp_file($port_holder->data_dir .'/postmaster.pid') =~
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/^$shmem_key_line_prefix/m;
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$port_holder->stop;
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}
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}
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# Node setup.
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subinit_start
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{
@@ -125,6 +147,7 @@ sub init_start
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$gnat->stop;
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$flea->stop;
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$port_holder->stopif$port_holder;
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log_ipcs();
129152

130153

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