Flipper: Question: Crash on start

[Aleksandr93]

I done all steps from documentation setup. But I get crash when I start application. (Android)

app module

 debugImplementation 'com.facebook.flipper:flipper:0.23.0'
 debugImplementation 'com.facebook.soloader:soloader:0.5.1'
 releaseImplementation 'com.facebook.flipper:flipper-noop:0.23.0'

Application onCreate

    SoLoader.init(this, false)
    if (BuildConfig.DEBUG && FlipperUtils.shouldEnableFlipper(this)) {
      val client = AndroidFlipperClient.getInstance(this)
      client.addPlugin(InspectorFlipperPlugin(this, DescriptorMapping.withDefaults()))
      client.start()
    }

I get this crash

Fatal signal 31 (SIGSYS), code 1 (SYS_SECCOMP) in tid 5400 (FlipperConnecti), pid 5345 (n.yoga.go.debug)
Cannot figure out the cause

What could be the problem?

UPDATE: This problem only on emulator. On physical device work.

[passy]

You're likely using an x86_64 emulator and something is making an illegal syscall. You can read more about this here: https://android-developers.googleblog.com/2017/07/seccomp-filter-in-android-o.html

Without some more information from the stacktrace it's not possible to tell where this is coming from, however.

[jbarr21]

i'm also running into this, the information provided by the Flipper Crash reporter is below. I get this when running the flipper sample app using ./gradlew :sample:installDebug as of d81a0379 on an x86-64 Pixel XL API 26 emulator. Please let me know if I can provide any more information that would help diagnose this issue

    Time    Tag Message
    23:04:06.580    libc    Fatal signal 31 (SIGSYS), code 1 in tid 9070 (FlipperConnecti)
    23:04:06.625    DEBUG   pid: 9046, tid: 9070, name: FlipperConnecti  >>> com.facebook.flipper.sample <<<

    23:04:06.625    DEBUG       rax 00000000000000e8  rbx 000074ac46197000  rcx ffffffffffffffff  rdx 0000000000000020

    23:04:06.625    DEBUG       r8  000000000000000b  r9  010074ac2df82db0  r10 00000000ffffffff  r11 0000000000000206

    23:04:06.625    DEBUG       r12 000074ac2df83cfc  r13 000074ac2e7e3c39  r14 0000000000000004  r15 000074ac477900f0

    23:04:06.625    DEBUG       rip 000074ac46abb6f8  rbp 000074ac2df82db0  rsp 000074ac2df82d88  eflags 0000000000000206

    23:04:06.627    DEBUG       #01 pc 0000000000039596  /data/app/com.facebook.flipper.sample-ntlBSzzfOAZ_z_J2MjjT9g==/lib/x86_64/libevent_extra.so

    23:04:06.627    DEBUG       #02 pc 00000000000399d4  /data/app/com.facebook.flipper.sample-ntlBSzzfOAZ_z_J2MjjT9g==/lib/x86_64/libevent_extra.so

    23:04:06.627    DEBUG       #03 pc 000000000002380d  /data/app/com.facebook.flipper.sample-ntlBSzzfOAZ_z_J2MjjT9g==/lib/x86_64/libevent_extra.so (event_base_loop+717)

    23:04:06.627    DEBUG       #04 pc 000000000056a3e5  /data/app/com.facebook.flipper.sample-ntlBSzzfOAZ_z_J2MjjT9g==/lib/x86_64/libflipper.so (_ZN5folly9EventBase8loopBodyEib+2405)

    23:04:06.627    DEBUG       #05 pc 0000000000569a6a  /data/app/com.facebook.flipper.sample-ntlBSzzfOAZ_z_J2MjjT9g==/lib/x86_64/libflipper.so (_ZN5folly9EventBase4loopEv+26)

    23:04:06.628    DEBUG       #06 pc 000000000056d810  /data/app/com.facebook.flipper.sample-ntlBSzzfOAZ_z_J2MjjT9g==/lib/x86_64/libflipper.so (_ZN5folly9EventBase11loopForeverEv+112)

    23:04:06.628    DEBUG       #07 pc 00000000003495f2  /data/app/com.facebook.flipper.sample-ntlBSzzfOAZ_z_J2MjjT9g==/lib/x86_64/libflipper.so

    23:04:06.628    DEBUG       #08 pc 000000000034a7f6  /data/app/com.facebook.flipper.sample-ntlBSzzfOAZ_z_J2MjjT9g==/lib/x86_64/libflipper.so

    23:04:06.628    DEBUG       #09 pc 000000000034a880  /data/app/com.facebook.flipper.sample-ntlBSzzfOAZ_z_J2MjjT9g==/lib/x86_64/libflipper.so

    23:04:06.628    DEBUG       #10 pc 000000000034a66a  /data/app/com.facebook.flipper.sample-ntlBSzzfOAZ_z_J2MjjT9g==/lib/x86_64/libflipper.so

    23:04:06.628    DEBUG       #11 pc 000000000034a61c  /data/app/com.facebook.flipper.sample-ntlBSzzfOAZ_z_J2MjjT9g==/lib/x86_64/libflipper.so

    23:04:06.628    DEBUG       #12 pc 000000000001efad  /data/app/com.facebook.flipper.sample-ntlBSzzfOAZ_z_J2MjjT9g==/oat/x86_64/base.odex (offset 0x14000)

    23:04:06.628    DEBUG       #13 pc 0000000000000003  <unknown>

    23:07:08.299    DEBUG   *** *** *** *** *** *** *** *** *** *** *** *** *** *** *** ***

    23:07:08.299    DEBUG   Build fingerprint: 'Android/sdk_gphone_x86_64/generic_x86_64:8.0.0/OSR1.180418.019/5598391:userdebug/dev-keys'

    23:07:08.299    DEBUG   Revision: '0'

    23:07:08.299    DEBUG   ABI: 'x86_64'

    23:07:08.299    DEBUG   signal 31 (SIGSYS), code 1 (SYS_SECCOMP), fault addr --------

    23:07:08.299    DEBUG   Cause: seccomp prevented call to disallowed x86_64 system call 0

    23:07:08.299    DEBUG       rsi 000074ac46042a80  rdi 0000000000000021

    23:07:08.300    DEBUG       cs  0000000000000033  ss  000000000000002b

    23:07:08.301    DEBUG   
backtrace:

    23:07:08.301    DEBUG       #00 pc 00000000000276f8  /system/lib64/libc.so (syscall+24)

    23:09:02.009    DeviceStateChecker  DeviceStateChecker cancelled

[passy]

I can reproduce that, too. It seems to be coming from libevent which is one patch version behind the one AOSP includes. We'll look into updating it.

[Mahmoood]

This issue reproduced on x86-64 emulators.
Worked on x86 emulators without any issue.

[gpeal]

@passy Any update here? We can't adopt this at my company because it won't run on any x86_64 emulators which is what we all use.

[passy]

@gpeal I haven't been able to try this myself, but could you check if manually disabling SECCOMB (adb shell setenforce 0 && adb stop && adb start) would help in this case?

[gpeal]

@passy adb start/stop aren't commands. I ran the first one and re-ran kill-server and start-server and it still crashes.

[passy]

I'll check this today but sadly we don't have a workaround this at the moment because one of our dependencies isn't compatible with newer versions of the NDK which fix this incompatibility.

[gpeal]

@passy it appears is 0.23.6 was never published