Android startup fails loading libmain.so due to OpenSSL library failure

[mbrubeck]

Since the latest Rust upgrade, Servo crashes on startup on Android with the following error:

java.lang.RuntimeException: Unable to start activity ComponentInfo{com.example.native_activity/rust.glutin.MainActivity}: java.lang.IllegalArgumentException: Unable to load native library: /data/data/com.example.native_activity/lib/libmain.so

dlerror returns the following in a small test program:

Loading library: Cannot load library: link_image[1916]: 5532 could not load needed library 'libandroid.so' for 'libmain.so' (link_image[1916]: 5532 could not load needed library 'libandroid_runtime.so' for 'libandroid.so' (link_image[1916]: 5532 could not load needed library 'libssl.so' for 'libandroid_runtime.so' (link_image[1916]: 5532 could not load needed library 'libcrypto.so.1.0.0' for 'libssl.so' (load_library[1118]: Library 'libcrypto.so.1.0.0' not found))))

The dynamic libraries mentioned above are all found in /system/lib except for libmain.so which is part of Servo and libcrypto.so.1.0.0 which does not exist. (There is only /system/lib/libcrypto.so. I'm not sure what is trying to use the versioned filename or why.)

We should be linking libssl and libcrypto statically on Android (sfackler/rust-openssl#119). Maybe our statically-linked versions are now conflicting somehow with the system version linked by libandroid_runtime.so?

[glennw]

Is strace available on android? It might show if it's trying to open those system libs and rejecting them?

[mbrubeck]

mwu suggested on IRC that we shouldn't be linking to libandroid.so at all, since the symbols it exposes are unstable and only meant to be used through JNI interfaces. When I modified Servo's linker arguments to remove -landroid, dlopen("libmain.so") with a different error:

Loading library: Cannot load library: link_image[1916]: 16623 could not load needed library 'libcrypto.so.1.0.0' for 'libmain.so' (load_library[1118]: Library 'libcrypto.so.1.0.0' not found)

[mbrubeck]

There is a libcrypto.so.1.0.0 in the support/android/openssl-1.0.1k directory, but it's not included in the APK because it fails this test in apk-builder (the filename doesn't end in ".so").

[mbrubeck]

We're no longer linking the OpenSSL libs statically because we don't set the new OPENSSL_STATIC variable added in sfackler/rust-openssl@c4f8427.