A fix for this bug has been merged here: https://git.qemu.org/?p=qemu.git;a=commitdiff;h=28876bf27d2792e6b16cf It has been released with QEMU v4.2. Can this bug ticket now be closed?
-- You received this bug notification because you are a member of qemu- devel-ml, which is subscribed to QEMU. https://bugs.launchpad.net/bugs/1836558 Title: Qemu-ppc Memory leak creating threads Status in QEMU: Confirmed Bug description: When creating c++ threads (with c++ std::thread), the resulting binary has memory leaks when running with qemu-ppc. Eg the following c++ program, when compiled with gcc, consumes more and more memory while running at qemu-ppc. (does not have memory leaks when compiling for Intel, when running same binary on real powerpc CPU hardware also no memory leaks). (Note I used function getCurrentRSS to show available memory, see https://stackoverflow.com/questions/669438/how-to-get-memory-usage-at- runtime-using-c; calls commented out here) Compiler: powerpc-linux-gnu-g++ (Debian 8.3.0-2) 8.3.0 (but same problem with older g++ compilers even 4.9) Os: Debian 10.0 ( Buster) (but same problem seen on Debian 9/stetch) qemu: qemu-ppc version 3.1.50 --- #include <iostream> #include <thread> #include <chrono> using namespace std::chrono_literals; // Create/run and join a 100 threads. void Fun100() { // auto b4 = getCurrentRSS(); // std::cout << getCurrentRSS() << std::endl; for(int n = 0; n < 100; n++) { std::thread t([] { std::this_thread::sleep_for( 10ms ); }); // std::cout << n << ' ' << getCurrentRSS() << std::endl; t.join(); } std::this_thread::sleep_for( 500ms ); // to give OS some time to wipe memory... // auto after = getCurrentRSS(); std::cout << b4 << ' ' << after << std::endl; } int main(int, char **) { Fun100(); Fun100(); // memory used keeps increasing } To manage notifications about this bug go to: https://bugs.launchpad.net/qemu/+bug/1836558/+subscriptions
