[Bug 235211] dlopen/libthr appears broken
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Sat Jan 26 05:41:28 UTC 2019
https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=235211
Bug ID: 235211
Summary: dlopen/libthr appears broken
Product: Base System
Version: CURRENT
Hardware: Any
OS: Any
Status: New
Severity: Affects Only Me
Priority: ---
Component: threads
Assignee: threads at FreeBSD.org
Reporter: kevans at freebsd.org
First observed with Lua and cqueue and reproduced on both 12.0-RELEASE as well
as -CURRENT. It was reported that this is a regression from 11 -> 12.
Fairly minimal test case [1]; an application that dlopen() an .so linked
against libthr and invokes a function in that .so that creates a new thread.
The new thread appears to be created (see [2] for truss output) but there we
stall without ever entering thread_start in the new thread.
[1] https://github.com/RhodiumToad/dynthr-test
[2] https://people.freebsd.org/~kevans/dynthr-broken.txt
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