Crashs of Precompiled FfiTrampoline on iOS

[latteinlove]

I used ffi to call the C method and it crashed. The crash information is as follows:

EXC_BAD_ACCESS KERN_INVALID_ADDRESS 0x0000000000000000

Crashed: io.flutter.1.ui
0  algo                           0x10139d9c4 fill_result + 188
1  App                            0x10a0cf7b0 Precompiled____FfiTrampoline_26367 + 752
2  App                            0x10a0cf758 Precompiled____FfiTrampoline_26367 + 664
3  App                            0x10a0cc298 Precompiled_SleepActivityAlgoApi_getActivityData_26348 + 700
4  App                            0x10a0ca6c4 Precompiled_ActivityDataMerge_getActivityAlgorithmData_26338 + 92
5  App                            0x10a0d14fc Precompiled_ActivityDataMerge_processBluetoothDataItem__async_op_26386 + 2572
6  App                            0x109b3e188 Precompiled_____rootRunUnary_4048458_7575 + 112
7  App                            0x109b3e4bc Precompiled_____rootRunUnary_4048458__rootRunUnary_4048458_7576 + 580
8  App                            0x109e961a0 Precompiled__CustomZone_4048458_runUnary_20615 + 204
9  App                            0x109960100 Precompiled__FutureListener_4048458_handleValue_664 + 208
10 App                            0x10a1053d8 Precompiled__Future_4048458__propagateToListeners_4048458_handleValueCallback_26813 + 84
11 App                            0x10995e718 Precompiled__Future_4048458__propagateToListeners_4048458_639 + 1148
12 App                            0x10995f5f4 Precompiled__Future_4048458__completeWithValue_4048458_653 + 124
13 App                            0x109e91e98 Precompiled__AsyncAwaitCompleter_4048458_complete_20526 + 424
14 App                            0x10994526c Precompiled_____completeOnAsyncReturn_4048458_311 + 56
15 App                            0x10a0c8504 Precompiled_QueryAdapter_query__async_op_26318 + 600
16 App                            0x109b3e188 Precompiled_____rootRunUnary_4048458_7575 + 112
17 App                            0x109b3e4bc Precompiled_____rootRunUnary_4048458__rootRunUnary_4048458_7576 + 580
18 App                            0x109e961a0 Precompiled__CustomZone_4048458_runUnary_20615 + 204
19 App                            0x109960100 Precompiled__FutureListener_4048458_handleValue_664 + 208
20 App                            0x10a1053d8 Precompiled__Future_4048458__propagateToListeners_4048458_handleValueCallback_26813 + 84
21 App                            0x10995e718 Precompiled__Future_4048458__propagateToListeners_4048458_639 + 1148
22 App                            0x10995f5f4 Precompiled__Future_4048458__completeWithValue_4048458_653 + 124
23 App                            0x109e91e98 Precompiled__AsyncAwaitCompleter_4048458_complete_20526 + 424
24 App                            0x10994526c Precompiled_____completeOnAsyncReturn_4048458_311 + 56
25 App                            0x10a0f1ef0 Precompiled__SqfliteDatabaseBase_Object_SqfliteDatabaseMixin_1865204050_txnSynchronized__async_op_26631 + 1148
26 App                            0x109b3e188 Precompiled_____rootRunUnary_4048458_7575 + 112
27 App                            0x109b3e4bc Precompiled_____rootRunUnary_4048458__rootRunUnary_4048458_7576 + 580
28 App                            0x109e961a0 Precompiled__CustomZone_4048458_runUnary_20615 + 204
29 App                            0x109960100 Precompiled__FutureListener_4048458_handleValue_664 + 208
30 App                            0x10a1053d8 Precompiled__Future_4048458__propagateToListeners_4048458_handleValueCallback_26813 + 84
31 App                            0x10995e718 Precompiled__Future_4048458__propagateToListeners_4048458_639 + 1148
32 App                            0x10995f5f4 Precompiled__Future_4048458__completeWithValue_4048458_653 + 124
33 App                            0x109e91e98 Precompiled__AsyncAwaitCompleter_4048458_complete_20526 + 424
34 App                            0x10994526c Precompiled_____completeOnAsyncReturn_4048458_311 + 56
35 App                            0x10a095738 Precompiled_BasicLock_synchronized__async_op_25907 + 1380
36 App                            0x109b3e188 Precompiled_____rootRunUnary_4048458_7575 + 112
37 App                            0x109b3e4bc Precompiled_____rootRunUnary_4048458__rootRunUnary_4048458_7576 + 580
38 App                            0x109e961a0 Precompiled__CustomZone_4048458_runUnary_20615 + 204
39 App                            0x109960100 Precompiled__FutureListener_4048458_handleValue_664 + 208
40 App                            0x10a1053d8 Precompiled__Future_4048458__propagateToListeners_4048458_handleValueCallback_26813 + 84
41 App                            0x10995e718 Precompiled__Future_4048458__propagateToListeners_4048458_639 + 1148
42 App                            0x10995f5f4 Precompiled__Future_4048458__completeWithValue_4048458_653 + 124
43 App                            0x109e91e98 Precompiled__AsyncAwaitCompleter_4048458_complete_20526 + 424
44 App                            0x10994526c Precompiled_____completeOnAsyncReturn_4048458_311 + 56
45 App                            0x10a0eb1b0 Precompiled__SqfliteDatabaseBase_Object_SqfliteDatabaseMixin_1865204050_txnRawQuery__anonymous_closure___async_op_26583 + 512
46 App                            0x109b3e188 Precompiled_____rootRunUnary_4048458_7575 + 112
47 App                            0x109b3e4bc Precompiled_____rootRunUnary_4048458__rootRunUnary_4048458_7576 + 580
48 App                            0x109e961a0 Precompiled__CustomZone_4048458_runUnary_20615 + 204
49 App                            0x109960100 Precompiled__FutureListener_4048458_handleValue_664 + 208
50 App                            0x10a1053d8 Precompiled__Future_4048458__propagateToListeners_4048458_handleValueCallback_26813 + 84
51 App                            0x10995e718 Precompiled__Future_4048458__propagateToListeners_4048458_639 + 1148
52 App                            0x10995f5f4 Precompiled__Future_4048458__completeWithValue_4048458_653 + 124
53 App                            0x109e91e98 Precompiled__AsyncAwaitCompleter_4048458_complete_20526 + 424
54 App                            0x10994526c Precompiled_____completeOnAsyncReturn_4048458_311 + 56
55 App                            0x10a0f2108 Precompiled____wrapDatabaseException__async_op_26632 + 388
56 App                            0x109b3e188 Precompiled_____rootRunUnary_4048458_7575 + 112
57 App                            0x109b3e4bc Precompiled_____rootRunUnary_4048458__rootRunUnary_4048458_7576 + 580
58 App                            0x109e961a0 Precompiled__CustomZone_4048458_runUnary_20615 + 204
59 App                            0x109960100 Precompiled__FutureListener_4048458_handleValue_664 + 208
60 App                            0x10a1053d8 Precompiled__Future_4048458__propagateToListeners_4048458_handleValueCallback_26813 + 84
61 App                            0x10995e718 Precompiled__Future_4048458__propagateToListeners_4048458_639 + 1148
62 App                            0x10995f5f4 Precompiled__Future_4048458__completeWithValue_4048458_653 + 124
63 App                            0x109e91e98 Precompiled__AsyncAwaitCompleter_4048458_complete_20526 + 424
64 App                            0x10994526c Precompiled_____completeOnAsyncReturn_4048458_311 + 56
65 App                            0x10a10357c Precompiled_MethodChannel__invokeMethod_967480135__async_op_26792 + 640
66 App                            0x109b3e188 Precompiled_____rootRunUnary_4048458_7575 + 112
67 App                            0x109b3e4bc Precompiled_____rootRunUnary_4048458__rootRunUnary_4048458_7576 + 580
68 App                            0x109e961a0 Precompiled__CustomZone_4048458_runUnary_20615 + 204
69 App                            0x109960100 Precompiled__FutureListener_4048458_handleValue_664 + 208
70 App                            0x10a1053d8 Precompiled__Future_4048458__propagateToListeners_4048458_handleValueCallback_26813 + 84
71 App                            0x10995e718 Precompiled__Future_4048458__propagateToListeners_4048458_639 + 1148
72 App                            0x10995f5f4 Precompiled__Future_4048458__completeWithValue_4048458_653 + 124
73 App                            0x10a1058cc Precompiled__Future_4048458__asyncCompleteWithValue_4048458__anonymous_closure__26815 + 76
74 App                            0x109b3d804 Precompiled_____rootRun_4048458_7564 + 216
75 App                            0x109b3da84 Precompiled_____rootRun_4048458__rootRun_4048458_7565 + 512
76 App                            0x109e93c6c Precompiled__CustomZone_4048458_run_20567 + 192
77 App                            0x109e965e4 Precompiled__CustomZone_4048458_runGuarded_20623 + 52
78 App                            0x10a059574 Precompiled__CustomZone_4048458_bindCallbackGuarded__anonymous_closure__25345 + 76
79 App                            0x109b3df88 Precompiled_____microtaskLoop_4048458_7572 + 120
80 App                            0x109b3f1f8 Precompiled_____startMicrotaskLoop_4048458_7587 + 40
81 App                            0x109b3f2f8 Precompiled_____startMicrotaskLoop_4048458__startMicrotaskLoop_4048458_7588 + 92
82 App                            0x10993123c Precompiled_Stub_InvokeDartCode + 268
83 Flutter                        0x10197818c (缺少)
84 Flutter                        0x101a57848 (缺少)
85 Flutter                        0x1017e2ca4 (缺少)
86 Flutter                        0x101511dd0 (缺少)
87 Flutter                        0x101513880 (缺少)
88 CoreFoundation                 0x194f6c134 __CFRUNLOOP_IS_CALLING_OUT_TO_A_TIMER_CALLBACK_FUNCTION__ + 28
89 CoreFoundation                 0x194f6be50 __CFRunLoopDoTimer + 880
90 CoreFoundation                 0x194f6b52c __CFRunLoopDoTimers + 276
91 CoreFoundation                 0x194f6653c __CFRunLoopRun + 1640
92 CoreFoundation                 0x194f65ba8 CFRunLoopRunSpecific + 424
93 Flutter                        0x10151375c (缺少)
94 Flutter                        0x101513128 (缺少)
95 libsystem_pthread.dylib        0x194d03d98 _pthread_start + 156
96 libsystem_pthread.dylib        0x194d0774c thread_start + 8

The getActivityData method is called as follows:

static StepSleepModel getActivityData({int stepInterval = StepInfoModel.DEFAULT_STEP_INTERVAL}) {
    Logcat.debug('$tag getActivityData() )');

    processDataAlg(...);

    final stageStepLength = (1440 / stepInterval).round();

    final sleepInfoPointer = allocate<SleepInfoStruct>();
    final stepInfoPointer = allocate<StepInfoStruct>();
    final stageStepListPointer = allocate<StageStepStruct>(count: stageStepLength);
    final activeListPointer = allocate<ActiveItemStruct>(count: 100);
    final fullActiveListPointer = allocate<ActiveItemStruct>(count: 100);
    final mainStageSleepPointer = allocate<StageSleepStruct>(count: 100);
    final allStageSleepPointer = allocate<StageSleepStruct>(count: 100);
    final lengthResultP = getActivityDataAlg(
      ...,
      stageStepLength,
      stepInfoPointer,
      stageStepListPointer,
      activeListPointer,
      fullActiveListPointer,
      sleepInfoPointer,
      mainStageSleepPointer,
      allStageSleepPointer,
    );
    if (lengthResultP == nullptr) {
      ///free pointer
      free(sleepInfoPointer);
      free(stepInfoPointer);
      free(stageStepListPointer);
      free(activeListPointer);
      free(fullActiveListPointer);
      free(mainStageSleepPointer);
      free(allStageSleepPointer);
      return null;
    }
 ...
}

The getActivityDataAlg method is called as follows:

final getActivityDataAlg = dylib
    .lookup<NativeFunction<get_activity_data_func>>('dataProcess_getData')
    .asFunction<GetActivityData>();

[dcharkes]

@latteinlove could you please provide a minimal reproduction?

What is the signature of get_activity_data_func and GetActivityData?