https://bugs.kde.org/show_bug.cgi?id=445504
Bug ID: 445504
Summary: Using C++ condition_variable results in bogus "mutex
is locked simultaneously by two threads" warning
Product: valgrind
Version: unspecified
Platform: Debian stable
OS: Linux
Status: REPORTED
Severity: normal
Priority: NOR
Component: drd
Assignee: [email protected]
Reporter: [email protected]
Target Milestone: ---
Created attachment 143555
--> https://bugs.kde.org/attachment.cgi?id=143555&action=edit
Testcase
$ g++ -pthread -Wall -o valgrind_test valgrind_test.cpp && valgrind --tool=drd
./valgrind_test
==867712== drd, a thread error detector
==867712== Copyright (C) 2006-2017, and GNU GPL'd, by Bart Van Assche.
==867712== Using Valgrind-3.16.1 and LibVEX; rerun with -h for copyright info
==867712== Command: ./valgrind_test
==867712==
Other thread: waiting for notify
==867712== The impossible happened: mutex is locked simultaneously by two
threads: mutex 0x1fff000080, recursion count 1, owner 2.
==867712== at 0x48428B4: pthread_mutex_lock (in
/usr/lib/x86_64-linux-gnu/valgrind/vgpreload_drd-amd64-linux.so)
==867712== by 0x10B917: __gthread_mutex_lock(pthread_mutex_t*) (in
/home/nikratio/consulting/valve/steamfs/valgrind_test)
==867712== by 0x10BB5F: std::mutex::lock() (in <redacted>/valgrind_test)
==867712== by 0x10C633: std::lock_guard<std::mutex>::lock_guard(std::mutex&)
(in <redacted>/valgrind_test)
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