Exported Plugin occasionally crashes when switching sample maps

[Casey Kolb]

Hey guys,

Some of my test users are occasionally experiencing plugin crashes when switching between sample maps in the exported plugin. The crashed thread is always "Pool". I've uploaded the relevant parts of the crash report below. Has anyone run into this issue before?

Process:               Logic Pro X [5351]
Path:                  /Applications/Logic Pro X.app/Contents/MacOS/Logic Pro X
Identifier:            com.apple.logic10
Version:               10.4.6 (5088)
Build Info:            MALogic-5088000000000000~2
App Item ID:           634148309
App External ID:       831740754
Code Type:             X86-64 (Native)
Parent Process:        ??? [1]
Responsible:           Logic Pro X [5351]
User ID:               501

PlugIn Path:             /Library/Audio/Plug-Ins/Components/CUBE.component/Contents/MacOS/CUBE
PlugIn Identifier:       com.myCompany.product
PlugIn Version:          0.6.2 (0.6.2)

Date/Time:             2020-11-12 15:07:45.301 -0500
OS Version:            Mac OS X 10.14.6 (18G87)
Report Version:        12
Anonymous UUID:        B16D2CF5-9E88-2423-88D6-53A076A93C26


Time Awake Since Boot: 23000 seconds

System Integrity Protection: enabled

Crashed Thread:        39  Pool

Exception Type:        EXC_BAD_ACCESS (SIGSEGV)
Exception Codes:       EXC_I386_GPFLT
Exception Note:        EXC_CORPSE_NOTIFY

Termination Signal:    Segmentation fault: 11
Termination Reason:    Namespace SIGNAL, Code 0xb
Terminating Process:   exc handler [5351]

Application Specific Information:
MALondonIII | e84d8ecce95d250e32c0f73d4c79d2b685e8718a80997af9a2b0f6c679216e01 | 28ef55f40e5dbf5cba062f4ca06868a3dc8a114d | 2019-07-04_15:24:24

Thread 39 Crashed:: Pool
0   com.myCompany.product         	0x00000001387eda70 0x138666000 + 1604208
1   com.myCompany.product         	0x00000001392d9e99 0x138666000 + 13057689
2   com.myCompany.product         	0x00000001392da23b 0x138666000 + 13058619
3   com.myCompany.product         	0x00000001392da23b 0x138666000 + 13058619
4   com.myCompany.product         	0x00000001392da23b 0x138666000 + 13058619
5   com.myCompany.product         	0x00000001392da23b 0x138666000 + 13058619
6   com.myCompany.product         	0x00000001392da23b 0x138666000 + 13058619
7   com.myCompany.product         	0x00000001392da23b 0x138666000 + 13058619
8   com.myCompany.product         	0x00000001392da23b 0x138666000 + 13058619
9   com.myCompany.product         	0x00000001392da23b 0x138666000 + 13058619
10  com.myCompany.product         	0x00000001392da23b 0x138666000 + 13058619
11  com.myCompany.product         	0x00000001392da23b 0x138666000 + 13058619
12  com.myCompany.product         	0x000000013935b6a6 0x138666000 + 13588134
13  com.myCompany.product         	0x000000013935a8a5 0x138666000 + 13584549
14  com.myCompany.product         	0x000000013935abad 0x138666000 + 13585325
15  com.myCompany.product         	0x00000001391e0616 0x138666000 + 12035606
16  com.myCompany.product         	0x00000001391bd99a 0x138666000 + 11893146
17  libsystem_pthread.dylib       	0x00007fff790222eb _pthread_body + 126
18  libsystem_pthread.dylib       	0x00007fff79025249 _pthread_start + 66
19  libsystem_pthread.dylib       	0x00007fff7902140d thread_start + 13

[d.healey]

Are all users who experience the issue using Logic? With the AU version of your plugin? Does the crash happen when they switch sample maps during playback or when the transport is stopped??

[Casey Kolb]

@d-healey Good q's – I've experienced a similar crash in the standalone, although less frequently. The others have all been in Logic using AU. Let me check with my testers if they were switching during playback, but I doubt it as we're still in preset development phase.

[Casey Kolb]

So it has never happened during playback. The transport is always stopped.

[d.healey]

Need more info.

So far it's only happening in Logic (and occasional, possibly related crash is happening in Standalone).
Does it also happen with the VST version?
Does it happen in any other DAW?
Can it be recreated on demand or is it intermittent?
What method is being used to switch sample maps? Does it also change preset at the same time?

[Casey Kolb]

So far it's only happening in Logic (and occasional, possibly related crash is happening in Standalone).
Does it also happen with the VST version?
Does it happen in any other DAW?

I'm having trouble replicating the crashes in other DAWs. I've seen this error on some other forums be directly related to Logic:

MALondonIII | e84d8ecce95d250e32c0f73d4c79d2b685e8718a80997af9a2b0f6c679216e01 | 28ef55f40e5dbf5cba062f4ca06868a3dc8a114d | 2019-07-04_15:24:24

Can it be recreated on demand or is it intermittent?

It's intermittent.

What method is being used to switch sample maps? Does it also change preset at the same time?

Presets are not being changed during the crash. I'm just using this function to swap sample maps:

sampler.loadSampleMap(sampleMapId);

I do set the pitch tracking value before calling this (this is necessary in case the user has turned it off for the previous sound), but not sure if that would make a difference:

sampler.setAttribute(9, 1);

[d.healey]

I think more expertise is required @Christoph-Hart