[tbb-bugs] #30239 [Applications/Tor Browser]: TBA: Gracefully handle auto-restart after crash

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#30239: TBA: Gracefully handle auto-restart after crash
------------------------------------------+------------------------
     Reporter:  sysrqb                    |      Owner:  tbb-team
         Type:  defect                    |     Status:  new
     Priority:  Medium                    |  Milestone:
    Component:  Applications/Tor Browser  |    Version:
     Severity:  Normal                    |   Keywords:  tbb-mobile
Actual Points:                            |  Parent ID:
       Points:                            |   Reviewer:
      Sponsor:                            |
------------------------------------------+------------------------
 Sometimes Android kills background/idle applications (arbitrarily) as a
 way of freeing memory needed by active/foreground apps or need by other
 system services. In some cases, the app is automatically restarted after
 some time period. Tor Browser on Android does not handle this well. When
 the app is opened, after it is "restarted", the user is shown a blank,
 purple screen. This leads me to think it is loading the TorBootstrap
 fragment, but it doesn't render (?).

 {{{
 13:59:19.189  3366  8097 I WindowManager: WIN DEATH: Window{bfd4312 u0
 org.torproject.torbrowser_alpha/org.mozilla.gecko.BrowserApp}
 13:59:19.223  3366  3380 I ActivityManager: Process
 org.torproject.torbrowser_alpha (pid 18467) has died: prcp FGS
 13:59:19.223  3366  3380 W ActivityManager: Scheduling restart of crashed
 service
 org.torproject.torbrowser_alpha/org.mozilla.gecko.media.MediaControlService
 in 23746ms
 13:59:19.223  3366  3380 W ActivityManager: Scheduling restart of crashed
 service
 org.torproject.torbrowser_alpha/org.torproject.android.service.TorService
 in 23746ms
 13:59:43.190  3366  3383 I ActivityManager: Start proc
 32619:org.torproject.torbrowser_alpha/u0a163 for service
 org.torproject.torbrowser_alpha/org.torproject.android.service.TorService

 15:46:44.817  3366  5721 I ActivityManager: START u0
 {act=android.intent.action.MAIN cat=[android.intent.category.LAUNCHER]
 flg=0x10200000 cmp=org.torproject.torbrowser_alpha/.App
 bnds=[237,1607][448,1807] (has extras)} from uid 10031
 15:46:44.966  3366  5711 I ActivityManager: START u0
 {act=android.intent.action.MAIN cat=[android.intent.category.LAUNCHER]
 flg=0x200000
 cmp=org.torproject.torbrowser_alpha/org.mozilla.gecko.BrowserApp
 bnds=[237,1607][448,1807] (has extras)} from uid 10163

 15:46:45.058 32619 32641 D GeckoSharedPrefs: Current version = 2, prefs
 version = 2
 }}}

 I can reproduce this by inducing a crash while the app is in the
 background (open torbrowser, then switch to another app, and then induce
 the crash, then reopen the torbrowser).

 {{{
 $ adb shell am crash org.torproject.torbrowser_alpha
 }}}

--
Ticket URL: <https://trac.torproject.org/projects/tor/ticket/30239>
Tor Bug Tracker & Wiki <https://trac.torproject.org/>
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