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Runtime crash with Hot Reload in libmono-component-debugger.so #105774

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jeromelaban opened this issue Jul 18, 2024 · 3 comments · Fixed by #105781
Closed

Runtime crash with Hot Reload in libmono-component-debugger.so #105774

jeromelaban opened this issue Jul 18, 2024 · 3 comments · Fixed by #105781
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@grendello @thaystg
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area-Debugger-mono in-pr There is an active PR which will close this issue when it is merged
Milestone
9.0.0

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@jeromelaban
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jeromelaban commented Jul 18, 2024 •
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Android framework version

net8.0-android, net9.0-android

Affected platform version

net 8.0.303, net9.0 p6

Description

Modifying a class in a very specific way will crash the app, with traces like this:

tablet_m-dpi_10_1in_-_api_34_1	Error	22416	DEBUG	backtrace:
#00 pc 0000000000029468  /data/app/~~YxzEw8uRs6euAg36gYGjcA==/com.companyname.mauiapp2-D7Yx-o9RLqpNV8ZSuFDlBA==/lib/x86_64/libmono-component-debugger.so (BuildId: 06dc7ca04b7e0642407ee3ce3a695a334ee43e6a)
dotnet/android#1 pc 0000000000028f45  /data/app/~~YxzEw8uRs6euAg36gYGjcA==/com.companyname.mauiapp2-D7Yx-o9RLqpNV8ZSuFDlBA==/lib/x86_64/libmono-component-debugger.so (BuildId: 06dc7ca04b7e0642407ee3ce3a695a334ee43e6a)
dotnet/android#2 pc 000000000003137c  /data/app/~~YxzEw8uRs6euAg36gYGjcA==/com.companyname.mauiapp2-D7Yx-o9RLqpNV8ZSuFDlBA==/lib/x86_64/libmono-component-debugger.so (BuildId: 06dc7ca04b7e0642407ee3ce3a695a334ee43e6a)
dotnet/android#3 pc 000000000001b772  /data/app/~~YxzEw8uRs6euAg36gYGjcA==/com.companyname.mauiapp2-D7Yx-o9RLqpNV8ZSuFDlBA==/lib/x86_64/libmono-component-debugger.so (BuildId: 06dc7ca04b7e0642407ee3ce3a695a334ee43e6a)
dotnet/android#4 pc 0000000000022c3f  /data/app/~~YxzEw8uRs6euAg36gYGjcA==/com.companyname.mauiapp2-D7Yx-o9RLqpNV8ZSuFDlBA==/lib/x86_64/libmono-component-debugger.so (BuildId: 06dc7ca04b7e0642407ee3ce3a695a334ee43e6a)
dotnet/android#5 pc 00000000000254ce  /data/app/~~YxzEw8uRs6euAg36gYGjcA==/com.companyname.mauiapp2-D7Yx-o9RLqpNV8ZSuFDlBA==/lib/x86_64/libmono-component-debugger.so (BuildId: 06dc7ca04b7e0642407ee3ce3a695a334ee43e6a)
dotnet/android#6 pc 00000000002c0bab  /data/app/~~YxzEw8uRs6euAg36gYGjcA==/com.companyname.mauiapp2-D7Yx-o9RLqpNV8ZSuFDlBA==/lib/x86_64/libmonosgen-2.0.so (BuildId: 529a184b6995fdc8e342e42c6d58e3b8ba06442f)
dotnet/android#7 pc 00000000000cd06a  /apex/com.android.runtime/lib64/bionic/libc.so (__pthread_start(void*)+58) (BuildId: fa337969c798946280caa45e2d71a2e7)
dotnet/android#8 pc 0000000000062d88  /apex/com.android.runtime/lib64/bionic/libc.so (__start_thread+56) (BuildId: fa337969c798946280caa45e2d71a2e7)

(Stack with net9 pre 6)

Steps to Reproduce

  1. Open this repro in VS 2022: 9120-MauiApp2.zip

  2. Open HRFAILURE.cs

  3. Build and debug the app with the #if true

  4. Once the app is started, change the #if to false

  5. Press the apply code changes button

Did you find any workaround?

Reducing the number of SuppressMessage kind of helps, but it feels like a memory corruption of some kind.

Relevant log output

No response
@jeromelaban jeromelaban mentioned this issue Jul 18, 2024
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@grendello
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@jeromelaban it's most likely an issue in MonoVM, not .NET For Android. However, would you mind recording a logcat just to be sure? Please follow these steps from VS Developer Prompt:

> adb logcat -G 65M
> adb shell setprop debug.mono.log default,assembly,mono_log_level=debug,mono_log_mask=all
> adb logcat -c
rem Deploy, start and crash the app then wait 10 seconds and:
> adb logcat -d > logcat.txt

And attach the resulting file, thanks!

@jeromelaban
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jeromelaban commented Jul 19, 2024 •
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@grendello Indeed, it's likely a fix to be made in dotnet/runtime, but as it reproduces on android/ios, I took a chance :)

Here's the logcat: 9120-logcat.zip

Likely relevant details 

07-19 08:35:13.229 30742 30784 I Mono    : >>> EnC delta for base=/data/data/com.companyname.mauiapp2/files/.__override__/MauiApp2.dll (generation 1) applied
--------- beginning of crash
07-19 08:35:13.261 30742 30784 F libc    : Fatal signal 11 (SIGSEGV), code 1 (SEGV_MAPERR), fault addr 0x8 in tid 30784 (Debugger agent), pid 30742 (nyname.mauiapp2)
07-19 08:35:13.317 30888 30888 I crash_dump64: obtaining output fd from tombstoned, type: kDebuggerdTombstoneProto
07-19 08:35:13.324   209   209 I tombstoned: received crash request for pid 30784
07-19 08:35:13.332 30888 30888 I crash_dump64: performing dump of process 30742 (target tid = 30784)
07-19 08:35:14.447     0     0 I logd    : logdr: UID=10195 GID=10195 PID=30888 n tail=500 logMask=8 pid=30742 start=0ns deadline=0ns
07-19 08:35:14.449     0     0 I logd    : logdr: UID=10195 GID=10195 PID=30888 n tail=500 logMask=1 pid=30742 start=0ns deadline=0ns
07-19 08:35:14.466 30888 30888 F DEBUG   : *** *** *** *** *** *** *** *** *** *** *** *** *** *** *** ***
07-19 08:35:14.466 30888 30888 F DEBUG   : Build fingerprint: 'google/sdk_gphone64_x86_64/emu64xa:14/UE1A.230829.036.A2/11596452:userdebug/dev-keys'
07-19 08:35:14.466 30888 30888 F DEBUG   : Revision: '0'
07-19 08:35:14.467 30888 30888 F DEBUG   : ABI: 'x86_64'
07-19 08:35:14.467 30888 30888 F DEBUG   : Timestamp: 2024-07-19 08:35:13.339976000-0400
07-19 08:35:14.467 30888 30888 F DEBUG   : Process uptime: 30s
07-19 08:35:14.467 30888 30888 F DEBUG   : Cmdline: com.companyname.mauiapp2
07-19 08:35:14.467 30888 30888 F DEBUG   : pid: 30742, tid: 30784, name: Debugger agent  >>> com.companyname.mauiapp2 <<<
07-19 08:35:14.471 30888 30888 F DEBUG   : uid: 10195
07-19 08:35:14.472 30888 30888 F DEBUG   : signal 11 (SIGSEGV), code 1 (SEGV_MAPERR), fault addr 0x0000000000000008
07-19 08:35:14.474 30888 30888 F DEBUG   : Cause: null pointer dereference
07-19 08:35:14.475 30888 30888 F DEBUG   :     rax 0000000000000000  rbx 00007aed02e6b4f0  rcx 0000000000000000  rdx 00007aeac25fb700
07-19 08:35:14.476 30888 30888 F DEBUG   :     r8  0000000000000000  r9  0000000000000000  r10 0000000000000000  r11 0000000000000000
07-19 08:35:14.479 30888 30888 F DEBUG   :     r12 00007aecb3bb5c60  r13 00007aecb3bb58a0  r14 0000000000000001  r15 00007aecd2e76900
07-19 08:35:14.482 30888 30888 F DEBUG   :     rdi 0000000000000000  rsi 00007aeb72e62e40
07-19 08:35:14.483 30888 30888 F DEBUG   :     rbp 00007aec63390130  rsp 00007aeac25fb700  rip 00007aeacba76468
07-19 08:35:14.487 30888 30888 F DEBUG   : 9 total frames
07-19 08:35:14.490 30888 30888 F DEBUG   : backtrace:
07-19 08:35:14.493 30888 30888 F DEBUG   :       #00 pc 0000000000029468  /data/app/~~JNsXHdWKSeB6StQzZkOeaQ==/com.companyname.mauiapp2-z26_qod_Lmz0MNbeSJnWVw==/lib/x86_64/libmono-component-debugger.so (BuildId: 06dc7ca04b7e0642407ee3ce3a695a334ee43e6a)
07-19 08:35:14.494 30888 30888 F DEBUG   :       dotnet/android#1 pc 0000000000028f45  /data/app/~~JNsXHdWKSeB6StQzZkOeaQ==/com.companyname.mauiapp2-z26_qod_Lmz0MNbeSJnWVw==/lib/x86_64/libmono-component-debugger.so (BuildId: 06dc7ca04b7e0642407ee3ce3a695a334ee43e6a)
07-19 08:35:14.494 30888 30888 F DEBUG   :       dotnet/android#2 pc 000000000003137c  /data/app/~~JNsXHdWKSeB6StQzZkOeaQ==/com.companyname.mauiapp2-z26_qod_Lmz0MNbeSJnWVw==/lib/x86_64/libmono-component-debugger.so (BuildId: 06dc7ca04b7e0642407ee3ce3a695a334ee43e6a)
07-19 08:35:14.494 30888 30888 F DEBUG   :       dotnet/android#3 pc 000000000001b772  /data/app/~~JNsXHdWKSeB6StQzZkOeaQ==/com.companyname.mauiapp2-z26_qod_Lmz0MNbeSJnWVw==/lib/x86_64/libmono-component-debugger.so (BuildId: 06dc7ca04b7e0642407ee3ce3a695a334ee43e6a)
07-19 08:35:14.494 30888 30888 F DEBUG   :       dotnet/android#4 pc 0000000000022c3f  /data/app/~~JNsXHdWKSeB6StQzZkOeaQ==/com.companyname.mauiapp2-z26_qod_Lmz0MNbeSJnWVw==/lib/x86_64/libmono-component-debugger.so (BuildId: 06dc7ca04b7e0642407ee3ce3a695a334ee43e6a)
07-19 08:35:14.494 30888 30888 F DEBUG   :       dotnet/android#5 pc 00000000000254ce  /data/app/~~JNsXHdWKSeB6StQzZkOeaQ==/com.companyname.mauiapp2-z26_qod_Lmz0MNbeSJnWVw==/lib/x86_64/libmono-component-debugger.so (BuildId: 06dc7ca04b7e0642407ee3ce3a695a334ee43e6a)
07-19 08:35:14.494 30888 30888 F DEBUG   :       dotnet/android#6 pc 00000000002c0bab  /data/app/~~JNsXHdWKSeB6StQzZkOeaQ==/com.companyname.mauiapp2-z26_qod_Lmz0MNbeSJnWVw==/lib/x86_64/libmonosgen-2.0.so (BuildId: 529a184b6995fdc8e342e42c6d58e3b8ba06442f)
07-19 08:35:14.495 30888 30888 F DEBUG   :       dotnet/android#7 pc 00000000000cd06a  /apex/com.android.runtime/lib64/bionic/libc.so (__pthread_start(void*)+58) (BuildId: fa337969c798946280caa45e2d71a2e7)
07-19 08:35:14.496 30888 30888 F DEBUG   :       dotnet/android#8 pc 0000000000062d88  /apex/com.android.runtime/lib64/bionic/libc.so (__start_thread+56) (BuildId: fa337969c798946280caa45e2d71a2e7)

@jonathanpeppers jonathanpeppers transferred this issue from dotnet/android Jul 31, 2024
@dotnet-issue-labeler dotnet-issue-labeler bot added the needs-area-label An area label is needed to ensure this gets routed to the appropriate area owners label Jul 31, 2024
@dotnet-policy-service dotnet-policy-service bot added the untriaged New issue has not been triaged by the area owner label Jul 31, 2024
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Tagging subscribers to this area: @thaystg
See info in area-owners.md if you want to be subscribed.

@thaystg thaystg added this to the 9.0.0 milestone Jul 31, 2024
@thaystg thaystg self-assigned this Jul 31, 2024
@dotnet-policy-service dotnet-policy-service bot removed the untriaged New issue has not been triaged by the area owner label Jul 31, 2024
@thaystg thaystg removed the needs-area-label An area label is needed to ensure this gets routed to the appropriate area owners label Jul 31, 2024
@thaystg thaystg mentioned this issue Jul 31, 2024
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[mono][debugger] Fixing AV on accessing source_file_list that is NULL thaystg/runtime
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@grendello @jonathanpeppers @thaystg @jeromelaban