qemu-user-static for armhf: segfault in threaded code
Affects | Status | Importance | Assigned to | Milestone | |
---|---|---|---|---|---|
QEMU |
Fix Released
|
Undecided
|
Unassigned |
Bug Description
Currently running QEMU from git (fedf2de31023) and running the armhf version of qemu-user-static which I have renamed qemu-armhf-static to follow the naming convention used in Debian.
The host systems is a Debian testing x86_64-linux and I have an Debian testing armhf chroot which I invoke using schroot.
Majority of program in the armhf chroot run fine, but I'm getting qemu segfaults in multi-threaded programs.
As an example, I've grabbed the threads demo program here:
https:/
and changed NUMTHRDS from 4 to 10. I compile it as (same compile command on both x86_64 host and armhf guest):
gcc -Wall -lpthread dotprod_mutex.c -o dotprod_mutex
When compiled for x86_64 host it runs perfectly and even under Valgrind displays no errors whatsoever.
However, when I compile the program in my armhs chroot and run it it usually (but not always) segaults or hangs or crashes. Example output:
(armhf) $ ./dotprod_mutex
Thread 1 did 100000 to 200000: mysum=100000.000000 global sum=100000.000000
Thread 0 did 0 to 100000: mysum=100000.000000 global sum=200000.000000
TCG temporary leak before f6731ca0
qemu-
tcg_
(armhf) $ ./dotprod_mutex
qemu: uncaught target signal 11 (Segmentation fault) - core dumped
Segmentation fault
(armhf) $ ./dotprod_mutex
qemu-
tcg_
(armhf) $ ./dotprod_mutex
Thread 1 did 100000 to 200000: mysum=100000.000000 global sum=100000.000000
qemu: uncaught target signal 11 (Segmentation fault) - core dumped
Segmentation fault
Changed in qemu: | |
status: | New → Confirmed |
I can also comple a purely static version of the test program in the armhf chroot using:
gcc -Wall -static -pthread dotprod_mutex.c -o dotprod- mutex-static
and then run it simply using:
qemu-arm-static dotprod- mutex-static
which fails just like it does in the chroot.