first-strace

execve("result/bin/sweep-ctl", ["result/bin/sweep-ctl", "/dev/ttyUSB0", "get", "sample_rate"], 0x7ffef6ff3368 /* 66 vars */) = 0
brk(NULL)                               = 0xbf6000
mmap(NULL, 8192, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7fbc77854000
access("/etc/ld-nix.so.preload", R_OK)  = -1 ENOENT (No such file or directory)
openat(AT_FDCWD, "/run/opengl-driver/lib/tls/haswell/x86_64/libsweep.so.1", O_RDONLY|O_CLOEXEC) = -1 ENOENT (No such file or directory)
stat("/run/opengl-driver/lib/tls/haswell/x86_64", 0x7ffd96e8d370) = -1 ENOENT (No such file or directory)
openat(AT_FDCWD, "/run/opengl-driver/lib/tls/haswell/libsweep.so.1", O_RDONLY|O_CLOEXEC) = -1 ENOENT (No such file or directory)
stat("/run/opengl-driver/lib/tls/haswell", 0x7ffd96e8d370) = -1 ENOENT (No such file or directory)
openat(AT_FDCWD, "/run/opengl-driver/lib/tls/x86_64/libsweep.so.1", O_RDONLY|O_CLOEXEC) = -1 ENOENT (No such file or directory)
stat("/run/opengl-driver/lib/tls/x86_64", 0x7ffd96e8d370) = -1 ENOENT (No such file or directory)
openat(AT_FDCWD, "/run/opengl-driver/lib/tls/libsweep.so.1", O_RDONLY|O_CLOEXEC) = -1 ENOENT (No such file or directory)
stat("/run/opengl-driver/lib/tls", 0x7ffd96e8d370) = -1 ENOENT (No such file or directory)
openat(AT_FDCWD, "/run/opengl-driver/lib/haswell/x86_64/libsweep.so.1", O_RDONLY|O_CLOEXEC) = -1 ENOENT (No such file or directory)
stat("/run/opengl-driver/lib/haswell/x86_64", 0x7ffd96e8d370) = -1 ENOENT (No such file or directory)
openat(AT_FDCWD, "/run/opengl-driver/lib/haswell/libsweep.so.1", O_RDONLY|O_CLOEXEC) = -1 ENOENT (No such file or directory)
stat("/run/opengl-driver/lib/haswell", 0x7ffd96e8d370) = -1 ENOENT (No such file or directory)
openat(AT_FDCWD, "/run/opengl-driver/lib/x86_64/libsweep.so.1", O_RDONLY|O_CLOEXEC) = -1 ENOENT (No such file or directory)
stat("/run/opengl-driver/lib/x86_64", 0x7ffd96e8d370) = -1 ENOENT (No such file or directory)
openat(AT_FDCWD, "/run/opengl-driver/lib/libsweep.so.1", O_RDONLY|O_CLOEXEC) = -1 ENOENT (No such file or directory)
stat("/run/opengl-driver/lib", {st_mode=S_IFDIR|0555, st_size=4096, ...}) = 0
openat(AT_FDCWD, "/run/opengl-driver-32/lib/tls/haswell/x86_64/libsweep.so.1", O_RDONLY|O_CLOEXEC) = -1 ENOENT (No such file or directory)
stat("/run/opengl-driver-32/lib/tls/haswell/x86_64", 0x7ffd96e8d370) = -1 ENOENT (No such file or directory)
openat(AT_FDCWD, "/run/opengl-driver-32/lib/tls/haswell/libsweep.so.1", O_RDONLY|O_CLOEXEC) = -1 ENOENT (No such file or directory)
stat("/run/opengl-driver-32/lib/tls/haswell", 0x7ffd96e8d370) = -1 ENOENT (No such file or directory)
openat(AT_FDCWD, "/run/opengl-driver-32/lib/tls/x86_64/libsweep.so.1", O_RDONLY|O_CLOEXEC) = -1 ENOENT (No such file or directory)
stat("/run/opengl-driver-32/lib/tls/x86_64", 0x7ffd96e8d370) = -1 ENOENT (No such file or directory)
openat(AT_FDCWD, "/run/opengl-driver-32/lib/tls/libsweep.so.1", O_RDONLY|O_CLOEXEC) = -1 ENOENT (No such file or directory)
stat("/run/opengl-driver-32/lib/tls", 0x7ffd96e8d370) = -1 ENOENT (No such file or directory)
openat(AT_FDCWD, "/run/opengl-driver-32/lib/haswell/x86_64/libsweep.so.1", O_RDONLY|O_CLOEXEC) = -1 ENOENT (No such file or directory)
stat("/run/opengl-driver-32/lib/haswell/x86_64", 0x7ffd96e8d370) = -1 ENOENT (No such file or directory)
openat(AT_FDCWD, "/run/opengl-driver-32/lib/haswell/libsweep.so.1", O_RDONLY|O_CLOEXEC) = -1 ENOENT (No such file or directory)
stat("/run/opengl-driver-32/lib/haswell", 0x7ffd96e8d370) = -1 ENOENT (No such file or directory)
openat(AT_FDCWD, "/run/opengl-driver-32/lib/x86_64/libsweep.so.1", O_RDONLY|O_CLOEXEC) = -1 ENOENT (No such file or directory)
stat("/run/opengl-driver-32/lib/x86_64", 0x7ffd96e8d370) = -1 ENOENT (No such file or directory)
openat(AT_FDCWD, "/run/opengl-driver-32/lib/libsweep.so.1", O_RDONLY|O_CLOEXEC) = -1 ENOENT (No such file or directory)
stat("/run/opengl-driver-32/lib", {st_mode=S_IFDIR|0555, st_size=4096, ...}) = 0
openat(AT_FDCWD, "/nix/store/fs107a1ii7qpg7rdswkic8f04alca1kl-libsweep/lib/tls/haswell/x86_64/libsweep.so.1", O_RDONLY|O_CLOEXEC) = -1 ENOENT (No such file or directory)
stat("/nix/store/fs107a1ii7qpg7rdswkic8f04alca1kl-libsweep/lib/tls/haswell/x86_64", 0x7ffd96e8d370) = -1 ENOENT (No such file or directory)
openat(AT_FDCWD, "/nix/store/fs107a1ii7qpg7rdswkic8f04alca1kl-libsweep/lib/tls/haswell/libsweep.so.1", O_RDONLY|O_CLOEXEC) = -1 ENOENT (No such file or directory)
stat("/nix/store/fs107a1ii7qpg7rdswkic8f04alca1kl-libsweep/lib/tls/haswell", 0x7ffd96e8d370) = -1 ENOENT (No such file or directory)
openat(AT_FDCWD, "/nix/store/fs107a1ii7qpg7rdswkic8f04alca1kl-libsweep/lib/tls/x86_64/libsweep.so.1", O_RDONLY|O_CLOEXEC) = -1 ENOENT (No such file or directory)
stat("/nix/store/fs107a1ii7qpg7rdswkic8f04alca1kl-libsweep/lib/tls/x86_64", 0x7ffd96e8d370) = -1 ENOENT (No such file or directory)
openat(AT_FDCWD, "/nix/store/fs107a1ii7qpg7rdswkic8f04alca1kl-libsweep/lib/tls/libsweep.so.1", O_RDONLY|O_CLOEXEC) = -1 ENOENT (No such file or directory)
stat("/nix/store/fs107a1ii7qpg7rdswkic8f04alca1kl-libsweep/lib/tls", 0x7ffd96e8d370) = -1 ENOENT (No such file or directory)
openat(AT_FDCWD, "/nix/store/fs107a1ii7qpg7rdswkic8f04alca1kl-libsweep/lib/haswell/x86_64/libsweep.so.1", O_RDONLY|O_CLOEXEC) = -1 ENOENT (No such file or directory)
stat("/nix/store/fs107a1ii7qpg7rdswkic8f04alca1kl-libsweep/lib/haswell/x86_64", 0x7ffd96e8d370) = -1 ENOENT (No such file or directory)
openat(AT_FDCWD, "/nix/store/fs107a1ii7qpg7rdswkic8f04alca1kl-libsweep/lib/haswell/libsweep.so.1", O_RDONLY|O_CLOEXEC) = -1 ENOENT (No such file or directory)
stat("/nix/store/fs107a1ii7qpg7rdswkic8f04alca1kl-libsweep/lib/haswell", 0x7ffd96e8d370) = -1 ENOENT (No such file or directory)
openat(AT_FDCWD, "/nix/store/fs107a1ii7qpg7rdswkic8f04alca1kl-libsweep/lib/x86_64/libsweep.so.1", O_RDONLY|O_CLOEXEC) = -1 ENOENT (No such file or directory)
stat("/nix/store/fs107a1ii7qpg7rdswkic8f04alca1kl-libsweep/lib/x86_64", 0x7ffd96e8d370) = -1 ENOENT (No such file or directory)
openat(AT_FDCWD, "/nix/store/fs107a1ii7qpg7rdswkic8f04alca1kl-libsweep/lib/libsweep.so.1", O_RDONLY|O_CLOEXEC) = 3
read(3, "\177ELF\2\1\1\0\0\0\0\0\0\0\0\0\3\0>\0\1\0\0\0\200$\0\0\0\0\0\0"..., 832) = 832
fstat(3, {st_mode=S_IFREG|0555, st_size=40264, ...}) = 0
mmap(NULL, 2125856, PROT_READ|PROT_EXEC, MAP_PRIVATE|MAP_DENYWRITE, 3, 0) = 0x7fbc7742a000
mprotect(0x7fbc77431000, 2093056, PROT_NONE) = 0
mmap(0x7fbc77630000, 8192, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_FIXED|MAP_DENYWRITE, 3, 0x6000) = 0x7fbc77630000
close(3)                                = 0
openat(AT_FDCWD, "/run/opengl-driver/lib/libpthread.so.0", O_RDONLY|O_CLOEXEC) = -1 ENOENT (No such file or directory)
openat(AT_FDCWD, "/run/opengl-driver-32/lib/libpthread.so.0", O_RDONLY|O_CLOEXEC) = -1 ENOENT (No such file or directory)
openat(AT_FDCWD, "/nix/store/fs107a1ii7qpg7rdswkic8f04alca1kl-libsweep/lib/libpthread.so.0", O_RDONLY|O_CLOEXEC) = -1 ENOENT (No such file or directory)
openat(AT_FDCWD, "/nix/store/2kcrj1ksd2a14bm5sky182fv2xwfhfap-glibc-2.26-131/lib/tls/haswell/x86_64/libpthread.so.0", O_RDONLY|O_CLOEXEC) = -1 ENOENT (No such file or directory)
stat("/nix/store/2kcrj1ksd2a14bm5sky182fv2xwfhfap-glibc-2.26-131/lib/tls/haswell/x86_64", 0x7ffd96e8d340) = -1 ENOENT (No such file or directory)
openat(AT_FDCWD, "/nix/store/2kcrj1ksd2a14bm5sky182fv2xwfhfap-glibc-2.26-131/lib/tls/haswell/libpthread.so.0", O_RDONLY|O_CLOEXEC) = -1 ENOENT (No such file or directory)
stat("/nix/store/2kcrj1ksd2a14bm5sky182fv2xwfhfap-glibc-2.26-131/lib/tls/haswell", 0x7ffd96e8d340) = -1 ENOENT (No such file or directory)
openat(AT_FDCWD, "/nix/store/2kcrj1ksd2a14bm5sky182fv2xwfhfap-glibc-2.26-131/lib/tls/x86_64/libpthread.so.0", O_RDONLY|O_CLOEXEC) = -1 ENOENT (No such file or directory)
stat("/nix/store/2kcrj1ksd2a14bm5sky182fv2xwfhfap-glibc-2.26-131/lib/tls/x86_64", 0x7ffd96e8d340) = -1 ENOENT (No such file or directory)
openat(AT_FDCWD, "/nix/store/2kcrj1ksd2a14bm5sky182fv2xwfhfap-glibc-2.26-131/lib/tls/libpthread.so.0", O_RDONLY|O_CLOEXEC) = -1 ENOENT (No such file or directory)
stat("/nix/store/2kcrj1ksd2a14bm5sky182fv2xwfhfap-glibc-2.26-131/lib/tls", 0x7ffd96e8d340) = -1 ENOENT (No such file or directory)
openat(AT_FDCWD, "/nix/store/2kcrj1ksd2a14bm5sky182fv2xwfhfap-glibc-2.26-131/lib/haswell/x86_64/libpthread.so.0", O_RDONLY|O_CLOEXEC) = -1 ENOENT (No such file or directory)
stat("/nix/store/2kcrj1ksd2a14bm5sky182fv2xwfhfap-glibc-2.26-131/lib/haswell/x86_64", 0x7ffd96e8d340) = -1 ENOENT (No such file or directory)
openat(AT_FDCWD, "/nix/store/2kcrj1ksd2a14bm5sky182fv2xwfhfap-glibc-2.26-131/lib/haswell/libpthread.so.0", O_RDONLY|O_CLOEXEC) = -1 ENOENT (No such file or directory)
stat("/nix/store/2kcrj1ksd2a14bm5sky182fv2xwfhfap-glibc-2.26-131/lib/haswell", 0x7ffd96e8d340) = -1 ENOENT (No such file or directory)
openat(AT_FDCWD, "/nix/store/2kcrj1ksd2a14bm5sky182fv2xwfhfap-glibc-2.26-131/lib/x86_64/libpthread.so.0", O_RDONLY|O_CLOEXEC) = -1 ENOENT (No such file or directory)
stat("/nix/store/2kcrj1ksd2a14bm5sky182fv2xwfhfap-glibc-2.26-131/lib/x86_64", 0x7ffd96e8d340) = -1 ENOENT (No such file or directory)
openat(AT_FDCWD, "/nix/store/2kcrj1ksd2a14bm5sky182fv2xwfhfap-glibc-2.26-131/lib/libpthread.so.0", O_RDONLY|O_CLOEXEC) = 3
read(3, "\177ELF\2\1\1\0\0\0\0\0\0\0\0\0\3\0>\0\1\0\0\0p_\0\0\0\0\0\0"..., 832) = 832
fstat(3, {st_mode=S_IFREG|0555, st_size=137184, ...}) = 0
mmap(NULL, 2216424, PROT_READ|PROT_EXEC, MAP_PRIVATE|MAP_DENYWRITE, 3, 0) = 0x7fbc7720c000
mprotect(0x7fbc77225000, 2093056, PROT_NONE) = 0
mmap(0x7fbc77424000, 8192, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_FIXED|MAP_DENYWRITE, 3, 0x18000) = 0x7fbc77424000
mmap(0x7fbc77426000, 12776, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_FIXED|MAP_ANONYMOUS, -1, 0) = 0x7fbc77426000
close(3)                                = 0
openat(AT_FDCWD, "/run/opengl-driver/lib/libstdc++.so.6", O_RDONLY|O_CLOEXEC) = -1 ENOENT (No such file or directory)
openat(AT_FDCWD, "/run/opengl-driver-32/lib/libstdc++.so.6", O_RDONLY|O_CLOEXEC) = -1 ENOENT (No such file or directory)
openat(AT_FDCWD, "/nix/store/fs107a1ii7qpg7rdswkic8f04alca1kl-libsweep/lib/libstdc++.so.6", O_RDONLY|O_CLOEXEC) = -1 ENOENT (No such file or directory)
openat(AT_FDCWD, "/nix/store/2kcrj1ksd2a14bm5sky182fv2xwfhfap-glibc-2.26-131/lib/libstdc++.so.6", O_RDONLY|O_CLOEXEC) = -1 ENOENT (No such file or directory)
openat(AT_FDCWD, "/nix/store/4zd34747fz0ggzzasy4icgn3lmy89pra-gcc-7.3.0-lib/lib/tls/haswell/x86_64/libstdc++.so.6", O_RDONLY|O_CLOEXEC) = -1 ENOENT (No such file or directory)
stat("/nix/store/4zd34747fz0ggzzasy4icgn3lmy89pra-gcc-7.3.0-lib/lib/tls/haswell/x86_64", 0x7ffd96e8d310) = -1 ENOENT (No such file or directory)
openat(AT_FDCWD, "/nix/store/4zd34747fz0ggzzasy4icgn3lmy89pra-gcc-7.3.0-lib/lib/tls/haswell/libstdc++.so.6", O_RDONLY|O_CLOEXEC) = -1 ENOENT (No such file or directory)
stat("/nix/store/4zd34747fz0ggzzasy4icgn3lmy89pra-gcc-7.3.0-lib/lib/tls/haswell", 0x7ffd96e8d310) = -1 ENOENT (No such file or directory)
openat(AT_FDCWD, "/nix/store/4zd34747fz0ggzzasy4icgn3lmy89pra-gcc-7.3.0-lib/lib/tls/x86_64/libstdc++.so.6", O_RDONLY|O_CLOEXEC) = -1 ENOENT (No such file or directory)
stat("/nix/store/4zd34747fz0ggzzasy4icgn3lmy89pra-gcc-7.3.0-lib/lib/tls/x86_64", 0x7ffd96e8d310) = -1 ENOENT (No such file or directory)
openat(AT_FDCWD, "/nix/store/4zd34747fz0ggzzasy4icgn3lmy89pra-gcc-7.3.0-lib/lib/tls/libstdc++.so.6", O_RDONLY|O_CLOEXEC) = -1 ENOENT (No such file or directory)
stat("/nix/store/4zd34747fz0ggzzasy4icgn3lmy89pra-gcc-7.3.0-lib/lib/tls", 0x7ffd96e8d310) = -1 ENOENT (No such file or directory)
openat(AT_FDCWD, "/nix/store/4zd34747fz0ggzzasy4icgn3lmy89pra-gcc-7.3.0-lib/lib/haswell/x86_64/libstdc++.so.6", O_RDONLY|O_CLOEXEC) = -1 ENOENT (No such file or directory)
stat("/nix/store/4zd34747fz0ggzzasy4icgn3lmy89pra-gcc-7.3.0-lib/lib/haswell/x86_64", 0x7ffd96e8d310) = -1 ENOENT (No such file or directory)
openat(AT_FDCWD, "/nix/store/4zd34747fz0ggzzasy4icgn3lmy89pra-gcc-7.3.0-lib/lib/haswell/libstdc++.so.6", O_RDONLY|O_CLOEXEC) = -1 ENOENT (No such file or directory)
stat("/nix/store/4zd34747fz0ggzzasy4icgn3lmy89pra-gcc-7.3.0-lib/lib/haswell", 0x7ffd96e8d310) = -1 ENOENT (No such file or directory)
openat(AT_FDCWD, "/nix/store/4zd34747fz0ggzzasy4icgn3lmy89pra-gcc-7.3.0-lib/lib/x86_64/libstdc++.so.6", O_RDONLY|O_CLOEXEC) = -1 ENOENT (No such file or directory)
stat("/nix/store/4zd34747fz0ggzzasy4icgn3lmy89pra-gcc-7.3.0-lib/lib/x86_64", 0x7ffd96e8d310) = -1 ENOENT (No such file or directory)
openat(AT_FDCWD, "/nix/store/4zd34747fz0ggzzasy4icgn3lmy89pra-gcc-7.3.0-lib/lib/libstdc++.so.6", O_RDONLY|O_CLOEXEC) = 3
read(3, "\177ELF\2\1\1\3\0\0\0\0\0\0\0\0\3\0>\0\1\0\0\0@\231\10\0\0\0\0\0"..., 832) = 832
fstat(3, {st_mode=S_IFREG|0555, st_size=1558864, ...}) = 0
mmap(NULL, 3667488, PROT_READ|PROT_EXEC, MAP_PRIVATE|MAP_DENYWRITE, 3, 0) = 0x7fbc76e8c000
mprotect(0x7fbc76ffc000, 2097152, PROT_NONE) = 0
mmap(0x7fbc771fc000, 53248, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_FIXED|MAP_DENYWRITE, 3, 0x170000) = 0x7fbc771fc000
mmap(0x7fbc77209000, 9760, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_FIXED|MAP_ANONYMOUS, -1, 0) = 0x7fbc77209000
close(3)                                = 0
openat(AT_FDCWD, "/run/opengl-driver/lib/libm.so.6", O_RDONLY|O_CLOEXEC) = -1 ENOENT (No such file or directory)
openat(AT_FDCWD, "/run/opengl-driver-32/lib/libm.so.6", O_RDONLY|O_CLOEXEC) = -1 ENOENT (No such file or directory)
openat(AT_FDCWD, "/nix/store/fs107a1ii7qpg7rdswkic8f04alca1kl-libsweep/lib/libm.so.6", O_RDONLY|O_CLOEXEC) = -1 ENOENT (No such file or directory)
openat(AT_FDCWD, "/nix/store/2kcrj1ksd2a14bm5sky182fv2xwfhfap-glibc-2.26-131/lib/libm.so.6", O_RDONLY|O_CLOEXEC) = 3
read(3, "\177ELF\2\1\1\3\0\0\0\0\0\0\0\0\3\0>\0\1\0\0\0\300w\0\0\0\0\0\0"..., 832) = 832
fstat(3, {st_mode=S_IFREG|0555, st_size=1440248, ...}) = 0
mmap(NULL, 3453480, PROT_READ|PROT_EXEC, MAP_PRIVATE|MAP_DENYWRITE, 3, 0) = 0x7fbc76b40000
mprotect(0x7fbc76c8b000, 2093056, PROT_NONE) = 0
mmap(0x7fbc76e8a000, 8192, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_FIXED|MAP_DENYWRITE, 3, 0x14a000) = 0x7fbc76e8a000
close(3)                                = 0
openat(AT_FDCWD, "/run/opengl-driver/lib/libgcc_s.so.1", O_RDONLY|O_CLOEXEC) = -1 ENOENT (No such file or directory)
openat(AT_FDCWD, "/run/opengl-driver-32/lib/libgcc_s.so.1", O_RDONLY|O_CLOEXEC) = -1 ENOENT (No such file or directory)
openat(AT_FDCWD, "/nix/store/fs107a1ii7qpg7rdswkic8f04alca1kl-libsweep/lib/libgcc_s.so.1", O_RDONLY|O_CLOEXEC) = -1 ENOENT (No such file or directory)
openat(AT_FDCWD, "/nix/store/2kcrj1ksd2a14bm5sky182fv2xwfhfap-glibc-2.26-131/lib/libgcc_s.so.1", O_RDONLY|O_CLOEXEC) = 3
read(3, "\177ELF\2\1\1\0\0\0\0\0\0\0\0\0\3\0>\0\1\0\0\0\20+\0\0\0\0\0\0"..., 832) = 832
fstat(3, {st_mode=S_IFREG|0444, st_size=100608, ...}) = 0
mmap(NULL, 2185600, PROT_READ|PROT_EXEC, MAP_PRIVATE|MAP_DENYWRITE, 3, 0) = 0x7fbc7692a000
mprotect(0x7fbc76940000, 2093056, PROT_NONE) = 0
mmap(0x7fbc76b3f000, 4096, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_FIXED|MAP_DENYWRITE, 3, 0x15000) = 0x7fbc76b3f000
close(3)                                = 0
openat(AT_FDCWD, "/run/opengl-driver/lib/libc.so.6", O_RDONLY|O_CLOEXEC) = -1 ENOENT (No such file or directory)
openat(AT_FDCWD, "/run/opengl-driver-32/lib/libc.so.6", O_RDONLY|O_CLOEXEC) = -1 ENOENT (No such file or directory)
openat(AT_FDCWD, "/nix/store/fs107a1ii7qpg7rdswkic8f04alca1kl-libsweep/lib/libc.so.6", O_RDONLY|O_CLOEXEC) = -1 ENOENT (No such file or directory)
openat(AT_FDCWD, "/nix/store/2kcrj1ksd2a14bm5sky182fv2xwfhfap-glibc-2.26-131/lib/libc.so.6", O_RDONLY|O_CLOEXEC) = 3
read(3, "\177ELF\2\1\1\3\0\0\0\0\0\0\0\0\3\0>\0\1\0\0\0@\21\2\0\0\0\0\0"..., 832) = 832
fstat(3, {st_mode=S_IFREG|0555, st_size=1998936, ...}) = 0
mmap(NULL, 3873024, PROT_READ|PROT_EXEC, MAP_PRIVATE|MAP_DENYWRITE, 3, 0) = 0x7fbc76578000
mprotect(0x7fbc76721000, 2093056, PROT_NONE) = 0
mmap(0x7fbc76920000, 24576, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_FIXED|MAP_DENYWRITE, 3, 0x1a8000) = 0x7fbc76920000
mmap(0x7fbc76926000, 14592, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_FIXED|MAP_ANONYMOUS, -1, 0) = 0x7fbc76926000
close(3)                                = 0
mmap(NULL, 8192, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7fbc77852000
mmap(NULL, 12288, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7fbc7784f000
arch_prctl(ARCH_SET_FS, 0x7fbc7784f740) = 0
mprotect(0x7fbc76920000, 16384, PROT_READ) = 0
mprotect(0x7fbc76e8a000, 4096, PROT_READ) = 0
mprotect(0x7fbc771fc000, 49152, PROT_READ) = 0
mprotect(0x7fbc77424000, 4096, PROT_READ) = 0
mprotect(0x7fbc77630000, 4096, PROT_READ) = 0
mprotect(0x602000, 4096, PROT_READ)     = 0
mprotect(0x7fbc77856000, 4096, PROT_READ) = 0
set_tid_address(0x7fbc7784fa10)         = 3440
set_robust_list(0x7fbc7784fa20, 24)     = 0
rt_sigaction(SIGRTMIN, {sa_handler=0x7fbc772119f0, sa_mask=[], sa_flags=SA_RESTORER|SA_SIGINFO, sa_restorer=0x7fbc7721ddd0}, NULL, 8) = 0
rt_sigaction(SIGRT_1, {sa_handler=0x7fbc77211a80, sa_mask=[], sa_flags=SA_RESTORER|SA_RESTART|SA_SIGINFO, sa_restorer=0x7fbc7721ddd0}, NULL, 8) = 0
rt_sigprocmask(SIG_UNBLOCK, [RTMIN RT_1], NULL, 8) = 0
prlimit64(0, RLIMIT_STACK, NULL, {rlim_cur=8192*1024, rlim_max=RLIM64_INFINITY}) = 0
brk(NULL)                               = 0xbf6000
brk(0xc17000)                           = 0xc17000
openat(AT_FDCWD, "/dev/ttyUSB0", O_RDWR|O_NOCTTY|O_NONBLOCK) = 3
ioctl(3, TCGETS, {B115200 -opost -isig -icanon -echo ...}) = 0
ioctl(3, TCGETS, {B115200 -opost -isig -icanon -echo ...}) = 0
ioctl(3, TCFLSH, TCIFLUSH)              = 0
ioctl(3, SNDCTL_TMR_START or TCSETS, {B115200 -opost -isig -icanon -echo ...}) = 0
nanosleep({tv_sec=0, tv_nsec=2000000}, 0x7ffd96e8dbd0) = 0
write(3, "DX\n", 3)                     = 3
nanosleep({tv_sec=0, tv_nsec=35000000}, 0x7ffd96e8dc20) = 0
select(4, [3], NULL, NULL, NULL