Hi
I see that my program works fine in the debug mode, but not in the release mode. With GDB I was able to find the function that got error. The code looks like
std::vector<std::vector<inst_trace_t> *> threadblock_traces;
...
printf("hello %d\n",threadblock_traces.size());
trace_kernel.get_next_threadblock_traces(threadblock_traces);
At the printf(), I see the size is 4. So, the vector is not empty. According to GDB, the backtrace is
Program received signal SIGSEGV, Segmentation fault.
__memmove_avx_unaligned_erms () at ../sysdeps/x86_64/multiarch/memmove-vec-unaligned-erms.S:384
384 ../sysdeps/x86_64/multiarch/memmove-vec-unaligned-erms.S: No such file or directory.
(gdb) bt
#0 __memmove_avx_unaligned_erms ()
at ../sysdeps/x86_64/multiarch/memmove-vec-unaligned-erms.S:384
#1 0x0000555555569849 in std::__copy_move<false, true, std::random_access_iterator_tag>::__copy_m<std::vector<inst_trace_t, std::allocator<inst_trace_t> >*> (__result=<optimized out>,
__last=<optimized out>, __first=<optimized out>) at /usr/include/c++/9/bits/stl_algobase.h:465
#2 std::__copy_move_a<false, std::vector<inst_trace_t, std::allocator<inst_trace_t> >* const*, std::vector<inst_trace_t, std::allocator<inst_trace_t> >**> (__result=<optimized out>,
__last=<optimized out>, __first=<optimized out>) at /usr/include/c++/9/bits/stl_algobase.h:404
#3 std::__copy_move_a2<false, __gnu_cxx::__normal_iterator<std::vector<inst_trace_t, std::allocator<inst_trace_t> >* const*, std::vector<std::vector<inst_trace_t, std::allocator<inst_trace_t> >*, std::allocator<std::vector<inst_trace_t, std::allocator<inst_trace_t> >*> > >, std::vector<inst_trace_t, std::allocator<inst_trace_t> >**> (__result=<optimized out>, __last=..., __first=...)
at /usr/include/c++/9/bits/stl_algobase.h:440
#4 std::copy<__gnu_cxx::__normal_iterator<std::vector<inst_trace_t, std::allocator<inst_trace_t> >* const*, std::vector<std::vector<inst_trace_t, std::allocator<inst_trace_t> >*, std::allocator<std::vector<inst_trace_t, std::allocator<inst_trace_t> >*> > >, std::vector<inst_trace_t, std::allocator<inst_trace_t> >**> (__result=<optimized out>, __last=..., __first=...)
at /usr/include/c++/9/bits/stl_algobase.h:474
#5 std::__uninitialized_copy<true>::__uninit_copy<__gnu_cxx::__normal_iterator<std::vector<inst_trace_t, std::allocator<inst_trace_t> >* const*, std::vector<std::vector<inst_trace_t, std::allocator<inst_trace_t> >*, std::allocator<std::vector<inst_trace_t, std::allocator<inst_trace_t> >*> > >, std::vector<inst_trace_t, std::allocator<inst_trace_t> >**> (__result=<optimized out>, __last=...,
__first=...) at /usr/include/c++/9/bits/stl_uninitialized.h:101
#6 std::uninitialized_copy<__gnu_cxx::__normal_iterator<std::vector<inst_trace_t, std::allocator<inst_trace_t> >* const*, std::vector<std::vector<inst_trace_t, std::allocator<inst_trace_t> >*, std::allocator<std::vector<inst_trace_t, std::allocator<inst_trace_t> >*> > >, std::vector<inst_trace_t, std::allocator<inst_trace_t> >**> (__result=<optimized out>, __last=..., __first=...)
at /usr/include/c++/9/bits/stl_uninitialized.h:140
#7 std::__uninitialized_copy_a<__gnu_cxx::__normal_iterator<std::vector<inst_trace_t, std::allocator<inst_trace_t> >* const*, std::vector<std::vector<inst_trace_t, std::allocator<inst_trace_t> >*, std::allocator<std::vector<inst_trace_t, std::allocator<inst_trace_t> >*> > >, std::vector<inst_trace_t, std::allocator<inst_trace_t> >**, std::vector<inst_trace_t, std::allocator<inst_trace_t> >*>
(__result=<optimized out>, __last=..., __first=...)
at /usr/include/c++/9/bits/stl_uninitialized.h:307
#8 std::vector<std::vector<inst_trace_t, std::allocator<inst_trace_t> >*, std::allocator<std::vector<inst_trace_t, std::allocator<inst_trace_t> >*> >::vector (
__x=std::vector of length 4, capacity 4 = {...}, this=0x7fffffffc4f0)
--Type <RET> for more, q to quit, c to continue without paging--
at /usr/include/c++/9/bits/stl_vector.h:555
#9 trace_shader_core_ctx::init_traces (this=0x55555696ec30, start_warp=0, end_warp=4, kernel=...)
at trace_driven.cc:486
With readelf command, you can see the compile options for both debug and release modes:
RELEASE:
$ readelf -p .GCC.command.line gpu-simulator/bin/release/accel-sim.out
String dump of section '.GCC.command.line':
[ 0] -I ./build/release
[ 13] -I ./trace-driven
[ 25] -I ./trace-parser
[ 37] -I /home/mahmood/accel-sim-framework/gpu-simulator/gpgpu-sim/libcuda
[ 7d] -I /home/mahmood/accel-sim-framework/gpu-simulator/gpgpu-sim/src
[ bf] -I /usr/local/cuda-11.2/include
[ df] -imultiarch x86_64-linux-gnu
[ fc] -D_GNU_SOURCE
[ 10a] main.cc
[ 112] -mtune=generic
[ 121] -march=x86-64
[ 12f] -auxbase-strip ./build/release/main.o
[ 155] -g3
[ 159] -O3
[ 15d] -Wall
[ 163] -std=c++11
[ 16e] -fPIC
[ 174] -frecord-gcc-switches
[ 18a] -fasynchronous-unwind-tables
[ 1a7] -fstack-protector-strong
[ 1c0] -Wformat-security
[ 1d2] -fstack-clash-protection
[ 1eb] -fcf-protection
DEBUG:
$ readelf -p .GCC.command.line gpu-simulator/bin/debug/accel-sim.out
String dump of section '.GCC.command.line':
[ 0] -I ./build/debug
[ 11] -I ./trace-driven
[ 23] -I ./trace-parser
[ 35] -I /home/mahmood/accel-sim-framework/gpu-simulator/gpgpu-sim/libcuda
[ 7b] -I /home/mahmood/accel-sim-framework/gpu-simulator/gpgpu-sim/src
[ bd] -I /usr/local/cuda-11.2/include
[ dd] -imultiarch x86_64-linux-gnu
[ fa] -D_GNU_SOURCE
[ 108] main.cc
[ 110] -mtune=generic
[ 11f] -march=x86-64
[ 12d] -auxbase-strip ./build/debug/main.o
[ 151] -g3
[ 155] -O0
[ 159] -Wall
[ 15f] -std=c++11
[ 16a] -fPIC
[ 170] -frecord-gcc-switches
[ 186] -fasynchronous-unwind-tables
[ 1a3] -fstack-protector-strong
[ 1bc] -Wformat-security
[ 1ce] -fstack-clash-protection
[ 1e7] -fcf-protection
I would like to know if a similar problem has been reported before.
Any idea about that?
Regards,
Mahmood
