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authorSeebs <seebs@seebs.net>2016-12-12 14:23:27 -0600
committerSeebs <seebs@seebs.net>2016-12-12 14:23:27 -0600
commitbd45c2d860de783433bedd3832c0c2c574591a3b (patch)
tree9f3ed55aaf3f34f3ef3a5ba75886ee796997a52a /test
parentfc66205e2603a7e715c921d66314457e286786e0 (diff)
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From: Rabin Vincent <rabinv@axis.com>
When tclsh forks it can create new threads in the child process, in a pthread_atfork() handler. Running this under pseudo results in a deadlock since the pseudo_lock() call in the new thread in the child process premanently believes that the mutex is already locked by another thread (which actually only existed in the parent process). The provided test cases reproduces this. Similar hangs can also been seen in other cases, such as when attempting to use vim's cscope support under pseudo. Fix it by reseting the mutex in a pthread_atfork() child function. Signed-off-by: Rabin Vincent <rabinv@axis.com> Signed-off-by: Seebs <seebs@seebs.net>
Diffstat (limited to 'test')
-rw-r--r--test/test-tclsh-fork.sh6
1 files changed, 6 insertions, 0 deletions
diff --git a/test/test-tclsh-fork.sh b/test/test-tclsh-fork.sh
new file mode 100644
index 0000000..e9dec66
--- /dev/null
+++ b/test/test-tclsh-fork.sh
@@ -0,0 +1,6 @@
+#!/bin/bash
+
+# Check that tclsh doesn't hang. Note that the timeout is not needed to
+# reproduce the hang in tclsh, it's only there to ensure that this test script
+# doesn't hang in case of a failing test.
+timeout 2s bash -c "echo 'open {|true} r+' | tclsh"