Crash on GraalVM at `1.9.0-RC` about kotlinx.coroutines

[sgammon]

@fzhinkin Yes, I have a reproducer. Here is one that works with a very simple native image build. It includes Coroutines 1.9.0-RC and Mosaic, where I have filed a related issue.

It seems like most of the stacktraces I can produce point to coroutines and/or atomicfu. I have much more detailed tracing in the following issues:

• Tracking issue (main, on our codebase): elide-develide#972
• Mosaic: JakeWharton/mosaic#386
• (Pending: GraalVM)

Reproducer:
coroutines-crash-reproducer-972.zip

I may need to file a bug with Micronaut as well if it relates to their code, but so far I don't see any hint that it does. I'm using the Micronaut project generator because it gets really close to our dependencies anyway (ours is a Micronaut/Picocli command line application).

There seem to be multiple exceptions or crashes, or maybe multiple bugs interplaying, so if I come up with other reproducers I will post them here and on the tracking ticket.

As far as I can tell, though, most hints points to either coroutines or atomicfu; specifically, the exception depicted surfaces if optimizations are in -O2. With -Ob, the exception goes away. So, maybe this is related to some optimization GraalVM is doing, but the class cast exception could still be valid, I don't know.

[fzhinkin]

@sgammon could you please provide an instruction on how to run a reproducer?

[fzhinkin]

@sgammon, thank you for sharing the reproducer!

I managed to reproduce the crash locally on macos-aarch64 with Graal EE 21, 22, and 23.
However, on Linux (both aarch64 and x86_64), the issue did not show up.

For me, the issue also gone after switching optimization level to -O1.

As a side note, commands to run the reproducer are (taken from the Graal's GH issue):

./gradlew nativeCompile
./build/native/nativeCompile/demo

[fzhinkin]

For the record, the stack trace I ended up with is:

Stacktrace for the failing thread 0x0000000126e05140 (A=AOT compiled, J=JIT compiled, D=deoptimized, i=inlined):
  A  SP 0x000000016b0525f0 IP 0x0000000105abe680 size=96    java.lang.Class.getTypeName(DynamicHub.java)
  A  SP 0x000000016b052650 IP 0x00000001051f4148 size=768   com.oracle.svm.core.snippets.ImplicitExceptions.throwNewClassCastExceptionWithArgs(ImplicitExceptions.java:311)
  A  SP 0x000000016b052950 IP 0x00000001064f4164 size=96    kotlin.coroutines.jvm.internal.BaseContinuationImpl.resumeWith(ContinuationImpl.kt:28)
  A  SP 0x000000016b0529b0 IP 0x00000001069aaaf4 size=96    kotlinx.coroutines.DispatchedTaskKt.resume(DispatchedTask.kt:229)
  i  SP 0x000000016b052a10 IP 0x00000001069a1480 size=80    kotlinx.coroutines.DispatchedTaskKt.dispatch(DispatchedTask.kt:162)
  A  SP 0x000000016b052a10 IP 0x00000001069a1480 size=80    kotlinx.coroutines.CancellableContinuationImpl.dispatchResume(CancellableContinuationImpl.kt:470)
  i  SP 0x000000016b052a60 IP 0x00000001069abee4 size=80    kotlinx.coroutines.CancellableContinuationImpl.resumeImpl$kotlinx_coroutines_core(CancellableContinuationImpl.kt:504)
  i  SP 0x000000016b052a60 IP 0x00000001069abee4 size=80    kotlinx.coroutines.CancellableContinuationImpl.resumeImpl$kotlinx_coroutines_core$default(CancellableContinuationImpl.kt:493)
  i  SP 0x000000016b052a60 IP 0x00000001069abee4 size=80    kotlinx.coroutines.CancellableContinuationImpl.resumeUndispatched(CancellableContinuationImpl.kt:596)
  A  SP 0x000000016b052a60 IP 0x00000001069abee4 size=80    kotlinx.coroutines.EventLoopImplBase$DelayedResumeTask.run(EventLoop.common.kt:497)
  A  SP 0x000000016b052ab0 IP 0x00000001069ae57c size=48    kotlinx.coroutines.EventLoopImplBase.processNextEvent(EventLoop.common.kt:263)
  A  SP 0x000000016b052ae0 IP 0x000000010699d8f0 size=80    kotlinx.coroutines.BlockingCoroutine.joinBlocking(Builders.kt:95)
  i  SP 0x000000016b052b30 IP 0x0000000105062528 size=112   kotlinx.coroutines.BuildersKt__BuildersKt.runBlocking(Builders.kt:69)
  i  SP 0x000000016b052b30 IP 0x0000000105062528 size=112   kotlinx.coroutines.BuildersKt.runBlocking(Unknown Source)
  i  SP 0x000000016b052b30 IP 0x0000000105062528 size=112   kotlinx.coroutines.BuildersKt__BuildersKt.runBlocking$default(Builders.kt:47)
  i  SP 0x000000016b052b30 IP 0x0000000105062528 size=112   kotlinx.coroutines.BuildersKt.runBlocking$default(Unknown Source)
  A  SP 0x000000016b052b30 IP 0x0000000105062528 size=112   com.jakewharton.mosaic.BlockingKt.runMosaicBlocking(blocking.kt:6)
  A  SP 0x000000016b052ba0 IP 0x0000000104f9f068 size=48    com.example.DemoCommand.run(DemoCommand.kt:24)
...

[fzhinkin]

I tried to debug the issue a bit more, and some outcomes so far:

• the crash from #4146 (comment) happens with coroutines 1.8.1 too;
• as I mentioned in #4146 (comment), the issue does not show up for binaries compiled with -O1, but the method where the crash happens compiles the same way with both -O1 and -O2.

[fzhinkin]

The crash is reproducible with Kotlin 1.9.24, Mosaic 0.12.0 and some older compose version: 972-w-1924.zip

[fzhinkin]

It is also reproducible with GraalEE 17. In all crash occurrences, it seems like we're hitting NPE:

(lldb) disassemble 
demo`CombinedContext_get_210292045824580ad9d3693d539e87b522b69d40:
   0x10191c210 <+0>:   sub    x8, sp, #0x40
    0x10191c214 <+4>:   ldr    x9, [x28, #0x8]
    0x10191c218 <+8>:   cmp    x8, x9
    0x10191c21c <+12>:  b.ls   0x10191c364               ; <+340>
    0x10191c220 <+16>:  stp    x29, x30, [sp, #-0x10]
    0x10191c224 <+20>:  sub    x29, sp, #0x10
    0x10191c228 <+24>:  mov    sp, x8
    0x10191c22c <+28>:  str    x1, [sp, #0x28]
    0x10191c230 <+32>:  cmp    x1, x27
    0x10191c234 <+36>:  b.eq   0x10191c2e8               ; <+216>
    0x10191c238 <+40>:  b      0x10191c2bc               ; <+172>
    0x10191c23c <+44>:  nop    
    0x10191c240 <+48>:  nop    
    0x10191c244 <+52>:  nop    
    0x10191c248 <+56>:  nop    
    0x10191c24c <+60>:  nop
    0x10191c250 <+64>:  str    x0, [sp, #0x20]
    0x10191c254 <+68>:  mov    w30, w30
    0x10191c258 <+72>:  add    x30, x27, x30, lsl #3
    0x10191c25c <+76>:  ldr    w2, [x30]
    0x10191c260 <+80>:  lsr    w2, w2, #5
    0x10191c264 <+84>:  mov    w2, w2
    0x10191c268 <+88>:  add    x2, x27, x2, lsl #3
->  0x10191c26c <+92>:  ldr    x2, [x2, #0xf0]
    0x10191c270 <+96>:  mov    x0, x30
    0x10191c274 <+100>: mov    x4, x1
    0x10191c278 <+104>: mov    x30, x2
    0x10191c27c <+108>: blr    x30
    0x10191c280 <+112>: nop    
    0x10191c284 <+116>: cmp    x0, x27
    0x10191c288 <+120>: b.ne   0x10191c2cc               ; <+188>
    0x10191c28c <+124>: ldr    x0, [sp, #0x20]
    0x10191c290 <+128>: ldr    w1, [x0, #0x4]
    0x10191c294 <+132>: mov    w30, w1
    0x10191c298 <+136>: add    x30, x27, x30, lsl #3
    0x10191c29c <+140>: cbz    w1, 0x10191c30c           ; <+252>
    0x10191c2a0 <+144>: ldr    w0, [x30]
    0x10191c2a4 <+148>: lsr    w0, w0, #5
    0x10191c2a8 <+152>: mov    w2, #0x965f
    0x10191c2ac <+156>: movk   w2, #0x18, lsl #16
    0x10191c2b0 <+160>: cmp    w0, w2
    0x10191c2b4 <+164>: b.ne   0x10191c30c               ; <+252>
    0x10191c2b8 <+168>: mov    x0, x30
    0x10191c2bc <+172>: ldr    x1, [sp, #0x28]
    0x10191c2c0 <+176>: ldr    w30, [x0, #0x8]
    0x10191c2c4 <+180>: cbnz   w30, 0x10191c250          ; <+64>
    0x10191c2c8 <+184>: b      0x10191c354               ; <+324>
    0x10191c2cc <+188>: ldp    x29, x30, [sp, #0x30]
    0x10191c2d0 <+192>: add    sp, sp, #0x40
    0x10191c2d4 <+196>: ldr    w8, [x28, #0x10]
    0x10191c2d8 <+200>: subs   w8, w8, #0x1
    0x10191c2dc <+204>: str    w8, [x28, #0x10]
    0x10191c2e0 <+208>: b.le   0x10191c368               ; <+344>
    0x10191c2e4 <+212>: ret    
    0x10191c2e8 <+216>: str    x0, [sp, #0x20]
    0x10191c2ec <+220>: mov    w2, #0x4f90
    0x10191c2f0 <+224>: movk   w2, #0x11, lsl #16
    0x10191c2f4 <+228>: add    x2, x27, x2, lsl #3
    0x10191c2f8 <+232>: mov    x0, x2
    0x10191c2fc <+236>: bl     0x101925da0               ; Intrinsics_throwParameterIsNullNPE_d91c2ab47c1f26bdc56e3112fa34c2d996ec1c47
    0x10191c300 <+240>: nop    
    0x10191c304 <+244>: ldr    x0, [sp, #0x20]
    0x10191c308 <+248>: b      0x10191c2bc               ; <+172>
    0x10191c30c <+252>: cbz    w1, 0x10191c35c           ; <+332>
    0x10191c310 <+256>: ldr    w0, [x30]
    0x10191c314 <+260>: lsr    w0, w0, #5
    0x10191c318 <+264>: mov    w0, w0
    0x10191c31c <+268>: add    x0, x27, x0, lsl #3
    0x10191c320 <+272>: ldr    x2, [x0, #0xf0]
    0x10191c324 <+276>: mov    x0, x30
    0x10191c328 <+280>: ldr    x1, [sp, #0x28]
    0x10191c32c <+284>: mov    x30, x2
    0x10191c330 <+288>: blr    x30
    0x10191c334 <+292>: nop    
    0x10191c338 <+296>: ldp    x29, x30, [sp, #0x30]
    0x10191c33c <+300>: add    sp, sp, #0x40
    0x10191c340 <+304>: ldr    w8, [x28, #0x10]
    0x10191c344 <+308>: subs   w8, w8, #0x1
    0x10191c348 <+312>: str    w8, [x28, #0x10]
    0x10191c34c <+316>: b.le   0x10191c368               ; <+344>
    0x10191c350 <+320>: ret    
    0x10191c354 <+324>: bl     0x1006ad180               ; ImplicitExceptions_throwNewNullPointerException_83e8a13d7d211b9efc4f752fd9d24059e9defb61
    0x10191c358 <+328>: nop    
    0x10191c35c <+332>: bl     0x1006ad180               ; ImplicitExceptions_throwNewNullPointerException_83e8a13d7d211b9efc4f752fd9d24059e9defb61
    0x10191c360 <+336>: nop    
    0x10191c364 <+340>: b      0x1005b3b70               ; StackOverflowCheckImpl_throwNewStackOverflowError_31341960d080a71e3dff8d322e20c16c7dc860eb
    0x10191c368 <+344>: b      0x1006c5780               ; aq_enterSlowPathSafepointCheckObject_4ef7cb08b9d10a255d4fb63cbcd79b0bd0e7a19c
    0x10191c36c <+348>: .long  0xcccccccc                ; unknown opcode


(lldb) register read    
    General Purpose Registers:
        x0 = 0x0000000282f315d8
        x1 = 0x00000002815b61e0
        x2 = 0x0000000280000000
        x3 = 0x00000000ffffffd9
        x4 = 0x0000000282f31610
        x5 = 0x0000000282f5e3e0
        x6 = 0x00000000005e6291
        x7 = 0x00000000a0000802
        x8 = 0x000000016fdfe620
        x9 = 0x000000016f60e000
       x10 = 0x0000000000000000
       x11 = 0x0000000282f5e3e8
       x12 = 0x0000000000000001
       x13 = 0x0000000000000000
       x14 = 0x0000000282f5e278
       x15 = 0x0000000280f31b10
       x16 = 0x0000000282f5e3d0
       x17 = 0x00000002814ac170
       x18 = 0x0000000000000000
       x19 = 0x00000000005e7ebb
       x20 = 0x0000000282f3f5d8
       x21 = 0x00000000005e7e46
       x22 = 0x0000000283000000
       x23 = 0x0000000282f3f248
       x24 = 0x0000000000000000
       x25 = 0x0000000000000000
       x26 = 0x0000000282f31270
       x27 = 0x0000000280000000
       x28 = 0x0000000156704b80
        fp = 0x000000016fdfe650
        lr = 0x0000000282f2f458
        sp = 0x000000016fdfe620
        pc = 0x000000010191c26c  demo`CombinedContext_get_210292045824580ad9d3693d539e87b522b69d40 + 92
      cpsr = 0x20001000

At the crash time, memory referred by x30 contains 0.