"Virtual timer expired" on ARM with -prof_pcs

Created by: toshipiazza

Split from issue #2905 (closed). When running a sufficiently large client under any app, I occasionally see "Virtual timer expired" messages and the app subsequently quits.

(xenial)piazzt@localhost:~/install/drcli/drtaint-master$ ~/SD/Build/dynamorio-master/exports/bin32/drrun -debug -prof_pcs -c /home/piazzt/install/drcli/drtaint-master/libdrtaint.so -- ls
<Starting application /bin/ls (8329)>
<Initial options = -no_dynamic_options -prof_pcs -client_lib '/home/piazzt/install/drcli/drtaint-master/libdrtaint.so;0;' -code_api -stack_size 56K -signal_stack_size 32K -max_elide_jmp 0 -max_elide_call 0 -early_inject -emulate_brk -no_inline_ignored_syscalls -native_exec_default_list '' -no_native_exec_managed_code -no_indcall2direct >
<(1+x) Handling our fault in a TRY at 0x711d2b58>
<log dir=/home/piazzt/SD/Build/dynamorio-master/exports/bin32/../logs/ls.8329.00000000>
Virtual timer expired

Also sometimes I see:

(xenial)piazzt@localhost:~/install/drcli/drtaint-master$ ~/SD/Build/dynamorio-master/exports/bin32/drrun -debug -prof_pcs -c /home/piazzt/install/drcli/drtaint-master/libdrtaint.so -- ls
<Starting application /bin/ls (8335)>
<Initial options = -no_dynamic_options -prof_pcs -client_lib '/home/piazzt/install/drcli/drtaint-master/libdrtaint.so;0;' -code_api -stack_size 56K -signal_stack_size 32K -max_elide_jmp 0 -max_elide_call 0 -early_inject -emulate_brk -no_inline_ignored_syscalls -native_exec_default_list '' -no_native_exec_managed_code -no_indcall2direct >
<(1+x) Handling our fault in a TRY at 0x711d2b58>
<log dir=/home/piazzt/SD/Build/dynamorio-master/exports/bin32/../logs/ls.8335.00000000>
<Paste into GDB to debug DynamoRIO clients:
set confirm off
add-symbol-file '/home/piazzt/install/drcli/drtaint-master/libdrtaint.so' 0xb141ba10
add-symbol-file '/home/piazzt/SD/Build/dynamorio-master/exports/lib32/debug/libdynamorio.so' 0x71023970
add-symbol-file '/home/piazzt/SD/Build/dynamorio-master/exports/ext/lib32/debug/libdrutil.so' 0xb1405de8
add-symbol-file '/home/piazzt/SD/Build/dynamorio-master/exports/ext/lib32/debug/libdrmgr.so' 0xb13ee708
add-symbol-file '/home/piazzt/install/exports32/drmf/lib32/debug/libumbra.so' 0x78001658
add-symbol-file '/lib/arm-linux-gnueabihf/libc.so.6' 0xb12f8f80
add-symbol-file '/lib/ld-linux-armhf.so.3' 0xb12b9840
add-symbol-file '/home/piazzt/install/exports32/drmf/lib32/debug/libdrsyscall.so' 0x7700311c
add-symbol-file '/home/piazzt/SD/Build/dynamorio-master/exports/ext/lib32/debug/libdrreg.so' 0xb13d5d4c
add-symbol-file '/usr/lib/arm-linux-gnueabihf/libstdc++.so.6' 0xb11d4278
add-symbol-file '/lib/arm-linux-gnueabihf/libm.so.6' 0xb10f0c58
add-symbol-file '/lib/arm-linux-gnueabihf/libgcc_s.so.1' 0xb10cc1b8
>
Virtual timer expired