** Attachment added: "Statically compiled test program for mips" https://bugs.launchpad.net/qemu/+bug/1704638/+attachment/4915584/+files/testpthsigmask-mips
-- You received this bug notification because you are a member of qemu- devel-ml, which is subscribed to QEMU. https://bugs.launchpad.net/bugs/1704638 Title: weak symbol access makes qemu in user mode hang for mips, mips64 Status in QEMU: New Bug description: A program that is statically linked and invokes a weak pointer should crash (because the weak pointer evaluates to NULL). With qemu in user mode, for mips and mips64, it hangs. The process needs to be killed with "kill -9". How to reproduce for mips: - Compile the program: mips-linux-gnu-gcc-5 -O -Wall -static -o testpthsigmask-mips testpthsigmask.c -pthread - Set environment variables for running qemu-mips. - ~/inst-qemu/2.9.0/bin/qemu-mips testpthsigmask-mips How to reproduce for mips64: - Compile the program: mips64-linux-gnuabi64-gcc-5 -O -Wall -static -o testpthsigmask-mips64 testpthsigmask.c -lpthread - Set environment variables for running qemu-mips64. - ~/inst-qemu/2.9.0/bin/qemu-mips64 testpthsigmask-mips64 When I attach gdb to the process, I see that it is hanging inside 'gen_intermediate_code': $ gdb /home/bruno/inst-qemu/2.9.0/bin/qemu-mips 9726 ... Reading symbols from /home/bruno/inst-qemu/2.9.0/bin/qemu-mips...done. Attaching to program: /home/bruno/inst-qemu/2.9.0/bin/qemu-mips, process 9726 ... (gdb) info threads Id Target Id Frame * 1 Thread 0x7f1e7e535740 (LWP 9726) "qemu-mips" __lll_lock_wait () at ../sysdeps/unix/sysv/linux/x86_64/lowlevellock.S:135 2 Thread 0x7f1e7d0ad700 (LWP 9727) "qemu-mips" syscall () at ../sysdeps/unix/sysv/linux/x86_64/syscall.S:38 (gdb) where #0 __lll_lock_wait () at ../sysdeps/unix/sysv/linux/x86_64/lowlevellock.S:135 #1 0x00007f1e7d6f1dbd in __GI___pthread_mutex_lock (mutex=mutex@entry=0x55de1c7ff830 <tcg_ctx+272>) at ../nptl/pthread_mutex_lock.c:80 #2 0x000055de1c527199 in qemu_mutex_lock (mutex=mutex@entry=0x55de1c7ff830 <tcg_ctx+272>) at /media/develdata/devel/build/qemu-2.9.0/util/qemu-thread-posix.c:60 #3 0x000055de1c435083 in tb_lock () at /media/develdata/devel/build/qemu-2.9.0/translate-all.c:167 #4 cpu_restore_state (cpu=cpu@entry=0x55de1e915cb0, retaddr=retaddr@entry=94412445741769) at /media/develdata/devel/build/qemu-2.9.0/translate-all.c:350 #5 0x000055de1c4658d0 in handle_cpu_signal (old_set=0x7ffe5ffd8ea8, is_write=0, address=0, pc=94412445741767) at /media/develdata/devel/build/qemu-2.9.0/user-exec.c:124 #6 cpu_mips_signal_handler (host_signum=host_signum@entry=11, pinfo=pinfo@entry=0x7ffe5ffd8eb0, puc=puc@entry=0x7ffe5ffd8d80) at /media/develdata/devel/build/qemu-2.9.0/user-exec.c:229 #7 0x000055de1c4803be in host_signal_handler (host_signum=11, info=0x7ffe5ffd8eb0, puc=0x7ffe5ffd8d80) at /media/develdata/devel/build/qemu-2.9.0/linux-user/signal.c:646 #8 <signal handler called> #9 __bswap_32 (__bsx=<optimized out>) at /usr/include/x86_64-linux-gnu/bits/byteswap.h:47 #10 bswap32 (x=<optimized out>) at /media/develdata/devel/build/qemu-2.9.0/include/qemu/bswap.h:21 #11 ldl_be_p (ptr=<optimized out>) at /media/develdata/devel/build/qemu-2.9.0/include/qemu/bswap.h:434 #12 cpu_ldl_code (env=0x55de1e91df48, ptr=0) at /media/develdata/devel/build/qemu-2.9.0/include/exec/cpu_ldst_useronly_template.h:68 #13 gen_intermediate_code (env=env@entry=0x55de1e91df48, tb=tb@entry=0x7f1e7b288e58) at /media/develdata/devel/build/qemu-2.9.0/target/mips/translate.c:19962 #14 0x000055de1c4352e6 in tb_gen_code (cpu=cpu@entry=0x55de1e915cb0, pc=pc@entry=0, cs_base=cs_base@entry=0, flags=flags@entry=162, cflags=<optimized out>, cflags@entry=0) at /media/develdata/devel/build/qemu-2.9.0/translate-all.c:1295 #15 0x000055de1c436a7a in tb_find (tb_exit=0, last_tb=0x0, cpu=<optimized out>) at /media/develdata/devel/build/qemu-2.9.0/cpu-exec.c:365 #16 cpu_exec (cpu=<optimized out>) at /media/develdata/devel/build/qemu-2.9.0/cpu-exec.c:673 #17 0x000055de1c466278 in cpu_loop (env=0x55de1e91df48) at /media/develdata/devel/build/qemu-2.9.0/linux-user/main.c:2236 #18 0x000055de1c433103 in main (argc=<optimized out>, argv=0x7ffe5ffd9de8, envp=<optimized out>) at /media/develdata/devel/build/qemu-2.9.0/linux-user/main.c:4860 (gdb) thread 2 [Switching to thread 2 (Thread 0x7f1e7d0ad700 (LWP 9727))] #0 syscall () at ../sysdeps/unix/sysv/linux/x86_64/syscall.S:38 38 ../sysdeps/unix/sysv/linux/x86_64/syscall.S: Datei oder Verzeichnis nicht gefunden. (gdb) where #0 syscall () at ../sysdeps/unix/sysv/linux/x86_64/syscall.S:38 #1 0x000055de1c527605 in qemu_futex_wait (val=<optimized out>, f=<optimized out>) at /media/develdata/devel/build/qemu-2.9.0/include/qemu/futex.h:26 #2 qemu_event_wait (ev=ev@entry=0x55de1e82c124 <rcu_call_ready_event>) at /media/develdata/devel/build/qemu-2.9.0/util/qemu-thread-posix.c:399 #3 0x000055de1c52d41e in call_rcu_thread (opaque=<optimized out>) at /media/develdata/devel/build/qemu-2.9.0/util/rcu.c:249 #4 0x00007f1e7d6ef6ba in start_thread (arg=0x7f1e7d0ad700) at pthread_create.c:333 #5 0x00007f1e7d4253dd in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:109 To manage notifications about this bug go to: https://bugs.launchpad.net/qemu/+bug/1704638/+subscriptions
