I am developing a Tensorflow-lite solution to be deployed on ARM-64 architecture. I cross compiled our C code using android ndk standalone toolchain. I included all the libraries which were required for compilation and successfully got a out.exe file and a out.so file on compilation. But on trying to run the .exe file on an android phone having arm64 architecture( using adb shell environment and pushed all the required libraries used during compilation and the out.so obtained ) it is giving null pointer dereference error. This is the error log obtained on cmd after executing the .exe file-
WARNING: linker: Warning: "/data/snd/NC2/libtensorflowlite_c.so" unused DT entry: DT_RPATH (type 0xf arg 0xf68) (ignoring)
WARNING: linker: Warning: "/data/snd/NC2/libpthread.so.0" has unsupported flags DT_FLAGS_1=0x29 (ignoring unsupported flags)
WARNING: linker: Warning: "/data/snd/NC2/libpthread.so.0" has unsupported flags DT_FLAGS_1=0x29 (ignoring unsupported flags)
WARNING: linker: Warning: "/data/snd/NC2/libpthread.so.0" has unsupported flags DT_FLAGS_1=0x29 (ignoring unsupported flags)
WARNING: linker: Warning: "/data/snd/NC2/libtensorflowlite_c.so" unused DT entry: DT_RPATH (type 0xf arg 0xf68) (ignoring)
WARNING: linker: Warning: "/data/snd/NC2/libpthread.so.0" has unsupported flags DT_FLAGS_1=0x29 (ignoring unsupported flags)
Segmentation fault (core dumped)
This is the log file obtained -
12-04 12:25:37.178 4209 4209 F DEBUG : signal 11 (SIGSEGV), code 1 (SEGV_MAPERR), fault addr 0x68
12-04 12:25:37.178 4209 4209 F DEBUG : Cause: null pointer dereference
12-04 12:25:37.178 4209 4209 F DEBUG : x0 0000000000000000 x1 000000775bd15ff8 x2 0000000000000000 x3 0000000000000001
12-04 12:25:37.178 4209 4209 F DEBUG : x4 0000008000000000 x5 0000000000000000 x6 0000000080000000 x7 00000000003880f3
12-04 12:25:37.178 4209 4209 F DEBUG : x8 000000000000000a x9 00000000000819f8 x10 000000775bd08000 x11 0000000000000020
12-04 12:25:37.178 4209 4209 F DEBUG : x12 0000000000000018 x13 0000000000000008 x14 000000775c9e1cc0 x15 0000000000000008
12-04 12:25:37.179 4209 4209 F DEBUG : x16 ffffffffffffffff x17 0000000000000030 x18 000000775cf20000 x19 000000775bd899f8
12-04 12:25:37.179 4209 4209 F DEBUG : x20 0000000000000018 x21 000000000000001c x22 0000001c00000402 x23 000000775dc89000
12-04 12:25:37.179 4209 4209 F DEBUG : x24 0000000000249430 x25 000000775bd15ff8 x26 000000775dc89000 x27 000000775be9f2b0
12-04 12:25:37.179 4209 4209 F DEBUG : x28 000000775be95000 x29 0000007fe049c150
12-04 12:25:37.179 4209 4209 F DEBUG : sp 0000007fe049c140 lr 000000775dbab6c0 pc 000000775bd89a00
12-04 12:25:37.193 4209 4209 F DEBUG :
12-04 12:25:37.193 4209 4209 F DEBUG : backtrace:
12-04 12:25:37.193 4209 4209 F DEBUG : NOTE: Function names and BuildId information is missing for some frames due
12-04 12:25:37.194 4209 4209 F DEBUG : NOTE: to unreadable libraries. For unwinds of apps, only shared libraries
12-04 12:25:37.194 4209 4209 F DEBUG : NOTE: found under the lib/ directory are readable.
12-04 12:25:37.194 4209 4209 F DEBUG : NOTE: On this device, run setenforce 0 to make the libraries readable.
12-04 12:25:37.194 4209 4209 F DEBUG : #00 pc 0000000000081a00 /data/snd/NC2/libc.so.6
12-04 12:25:37.194 4209 4209 F DEBUG : #01 pc 000000000003e6bc /apex/com.android.runtime/bin/linker64 (__dl__Z19call_ifunc_resolvery+16) (BuildId: 4a559408e8da42af235cf9e971c68c35)
The list of libraries that I included for cross compilation are - libtensorflowlite_c.so ,libpthread.so.0, ld-linux-aarch64.so.1, libc.so.6 libc++.so ,libdl.so.2, libm.so.6, librt.so.1,libstdc++.so.6, libgcc_s.so.1. (All these libraries have Linux as the OS and arm64 as the architecture to be deployed on).