Help with: Buffer_Not_Writeable_By_vImage

Dan Korneff

I have an exported AAX that is crashing randomly with Access Violation.
The crash report looks like:

	0x7fff68034f53 : - (libsystem_pthread.dylib @ 0x7fff68033000)
	0x7fff68034c98 : - (libsystem_pthread.dylib @ 0x7fff68033000)
	0x7fff6510b575 : - (libc++.1.dylib @ 0x7fff65103000)
	0x1318f3392 : - (My Awesome Plugin @ 0x130bdd000)
	0x1318f1486 : - (My Awesome Plugin @ 0x130bdd000)
	0x1318f134a : - (My Awesome Plugin @ 0x130bdd000)
	0x7fff2dea7884 : - (CoreFoundation @ 0x7fff2de23000)
	0x7fff2dea7823 : - (CoreFoundation @ 0x7fff2de23000)
	0x7fff2dea763d : - (CoreFoundation @ 0x7fff2de23000)
	0x7fff2dea6359 : - (CoreFoundation @ 0x7fff2de23000)
	0x7fff2dea5953 : - (CoreFoundation @ 0x7fff2de23000)
	0x7fff2cac0abd : - (HIToolbox @ 0x7fff2ca91000)
	0x7fff2cac07d5 : - (HIToolbox @ 0x7fff2ca91000)
	0x7fff2cac0579 : - (HIToolbox @ 0x7fff2ca91000)
	0x7fff2b106039 : - (AppKit @ 0x7fff2b0c5000)
	0x7fff2b104880 : - (AppKit @ 0x7fff2b0c5000)
	0x7fff2b0f658e : - (AppKit @ 0x7fff2b0c5000)
	0x109f51607 : - (DFW @ 0x109d13000)
	0x109d552da : - (DFW @ 0x109d13000)
	0x125108620 : - (ProTools_Indigo @ 0x11ff00000)
	0x12510f431 : - (ProTools_Indigo @ 0x11ff00000)
	0x108c0d9c8 : - (Pro Tools @ 0x108c08000)
	0x7fff67e30cc9 : - (libdyld.dylib @ 0x7fff67e16000)

When I profile the app, I see this error:

vImageDebug_CheckDestBuffer
_ERROR_Buffer_Write__Too_Small_For_Arguments_To_vImage__CheckBacktrace
_ERROR_Buffer_Not_Writeable_By_vImage__CheckBacktrace

Image related? Does this ring a bell for anyone?

Christoph Hart

@Dan-Korneff No, but you can compile the plugin now with debug symbols to get a better crash report:

HISE | Docs

(docs.hise.audio)

Dan Korneff

@Christoph-Hart amazing! How long has this been available??

Christoph Hart

@Dan-Korneff it‘s a recent addition (a few weeks back) so your entire life hasn‘t been a lie :)

Dan Korneff

@Christoph-Hart The debug worked great!
This is what the Crashed thread looks like:

Thread 0 Crashed:: Main Thread  Dispatch queue: com.apple.main-thread
0   com.apple.CoreText            	0x00007fff3a3c3807 ConvertToMorxAsync(__CTFont const*) + 209
1   com.apple.CoreText            	0x00007fff3a3cc28c TASCIIEncoder::Encode() + 44
2   com.apple.CoreText            	0x00007fff3a3cbcf7 TGlyphEncoder::EncodeChars(CFRange, TAttributes const&, TGlyphEncoder::Fallbacks) + 1023
3   com.apple.CoreText            	0x00007fff3a3cb3e1 TTypesetterAttrString::Initialize(__CFAttributedString const*) + 291
4   com.apple.CoreText            	0x00007fff3a3cb0fd TTypesetterAttrString::TTypesetterAttrString(__CFAttributedString const*, __CFDictionary const*) + 163
5   com.apple.CoreText            	0x00007fff3a3caf83 CTLineCreateWithAttributedString + 85
6   com.korneffaudio.myplug       	0x0000000132f3445b juce::OSXTypeface::getGlyphPositions(juce::String const&, juce::Array<int, juce::DummyCriticalSection, 0>&, juce::Array<float, juce::DummyCriticalSection, 0>&) + 251
7   com.korneffaudio.myplug       	0x0000000132f38d4f juce::Font::getGlyphPositions(juce::String const&, juce::Array<int, juce::DummyCriticalSection, 0>&, juce::Array<float, juce::DummyCriticalSection, 0>&) const + 63
8   com.korneffaudio.myplug       	0x0000000132c920d0 hise::MarkdownLayout::MarkdownLayout(juce::AttributedString const&, float, std::__1::function<float (juce::Font const&, juce::String const&)> const&, bool) + 816
9   com.korneffaudio.myplug       	0x0000000132c96962 hise::MarkdownParser::MarkdownTable::Row::updateHeight(float, float&, hise::MarkdownParser*) + 562
10  com.korneffaudio.myplug       	0x0000000132c94b6a hise::MarkdownParser::MarkdownTable::getHeightForWidth(float) + 298
11  com.korneffaudio.myplug       	0x0000000132ca9377 hise::MarkdownPreview::resized() + 535
12  com.korneffaudio.myplug       	0x0000000132fa8dd4 juce::Component::sendMovedResizedMessages(bool, bool) + 196
13  com.korneffaudio.myplug       	0x0000000132fa8dd4 juce::Component::sendMovedResizedMessages(bool, bool) + 196
14  com.korneffaudio.myplug       	0x00000001323ad652 hise::FloatingTile::resized() + 578
15  com.korneffaudio.myplug       	0x0000000132fa8dd4 juce::Component::sendMovedResizedMessages(bool, bool) + 196
16  com.korneffaudio.myplug       	0x00000001327bce48 hise::ScriptContentComponent::updateContent(hise::ScriptingApi::Content::ScriptComponent*) + 296
17  com.korneffaudio.myplug       	0x00000001327ba678 hise::ScriptContentComponent::setNewContent(hise::ScriptingApi::Content*) + 3080
18  com.korneffaudio.myplug       	0x00000001322d16cf hise::InterfaceContentPanel::connectToScript() + 2239
19  com.korneffaudio.myplug       	0x00000001322d07bb hise::FloatingTileContent* hise::FloatingTileContent::Factory::createFunc<hise::InterfaceContentPanel>(hise::FloatingTile*) + 251
20  com.korneffaudio.myplug       	0x00000001325a7017 hise::FrontendProcessorEditor::FrontendProcessorEditor(hise::FrontendProcessor*) + 2231
21  com.korneffaudio.myplug       	0x00000001325a3952 hise::FrontendProcessor::createEditor() + 34
22  com.korneffaudio.myplug       	0x0000000132228ad1 AAXClasses::JuceAAX_GUI::CreateViewContents() + 241
23  com.korneffaudio.myplug       	0x0000000132226dc0 AAX_CEffectGUI::Initialize(IACFUnknown*) + 108
24  com.avid.framework.AAXHost    	0x0000000127fe1f0c AAXH_VEffectGUI::Initialize(IACFUnknown*) + 2046
25  com.avid.framework.AAXHost    	0x0000000127f9fc6a AAXH_CEffectGUI::Initialize(IACFUnknown*) + 2410
26  com.avid.framework.AAXHost    	0x0000000127f2d713 AAXH_CPlugIn::CreateEffectGUI() + 2683
27  com.avid.framework.AAE        	0x0000000128bb3c66 CFicAAXWidget::SetPlugInViewContainer(SFicPlugInSpec*, IACFUnknown*) + 118
28  com.digidesign.framework.SMgr 	0x000000012a588256 SMgr_ViewContainer::SetViewContainer(void*) + 96
29  com.digidesign.framework.ProTools_Orange	0x0000000120503b18 TFXTDMEditView::AdjustViewForTarget() + 544
30  com.digidesign.framework.ProTools_Orange	0x0000000120503832 TFXTDMEditView::AdjustToNewTarget() + 22
31  com.digidesign.framework.ProTools_Orange	0x000000012052f946 TFXWindow::AdjustToNewTarget() + 6190
32  com.digidesign.framework.ProTools_Orange	0x00000001205394c5 TFXWindow::TargetHasChanged() + 4447
33  com.digidesign.framework.ProTools_Orange	0x000000012052c023 TFXWindow::SetTarget(Cmn_Handle2<TSoundTrack, Cmn_Handle_NoDelete<TCollabObject const> >, short, short, bool, bool) + 4391
34  com.digidesign.framework.ProTools_Orange	0x0000000120341279 TEffectWindowMgr::OpenWindow(Cmn_Handle2<TSoundTrack, Cmn_Handle_NoDelete<TCollabObject const> >, short, short, bool, bool, bool, VPoint, bool) + 1219
35  com.digidesign.framework.ProTools_Orange	0x000000011fc6241b TAEffectNameView::DoMouseCommand(VPoint&, TToolboxEvent*, _CPoint) + 8771
36  com.digidesign.framework.DFW  	0x000000010719f216 TView::HandleMouseDown(VPoint const&, TToolboxEvent*, _CPoint) + 998
37  com.digidesign.framework.DFW  	0x000000010719f010 TView::HandleMouseDown(VPoint const&, TToolboxEvent*, _CPoint) + 480
38  com.digidesign.framework.DFW  	0x000000010719f010 TView::HandleMouseDown(VPoint const&, TToolboxEvent*, _CPoint) + 480
39  com.digidesign.framework.DFW  	0x000000010719f010 TView::HandleMouseDown(VPoint const&, TToolboxEvent*, _CPoint) + 480
40  com.digidesign.framework.DFW  	0x000000010719f010 TView::HandleMouseDown(VPoint const&, TToolboxEvent*, _CPoint) + 480
41  com.digidesign.framework.ProTools_Orange	0x00000001202ec5d5 TEditTable::HandleMouseDown(VPoint const&, TToolboxEvent*, _CPoint) + 4291
42  com.digidesign.framework.DFW  	0x000000010719f010 TView::HandleMouseDown(VPoint const&, TToolboxEvent*, _CPoint) + 480
43  com.digidesign.framework.DFW  	0x000000010719f010 TView::HandleMouseDown(VPoint const&, TToolboxEvent*, _CPoint) + 480
44  com.digidesign.framework.ProTools_Orange	0x0000000123468b0e TEditTimelineView::HandleMouseDown(VPoint const&, TToolboxEvent*, _CPoint) + 3902
45  com.digidesign.framework.DFW  	0x000000010719f010 TView::HandleMouseDown(VPoint const&, TToolboxEvent*, _CPoint) + 480
46  com.digidesign.framework.DFW  	0x000000010719f010 TView::HandleMouseDown(VPoint const&, TToolboxEvent*, _CPoint) + 480
47  com.digidesign.framework.ProTools_Orange	0x0000000120309788 TEditWindow::HandleMouseDown(VPoint const&, TToolboxEvent*, _CPoint) + 160
48  com.digidesign.framework.DFW  	0x00000001071aad59 -[DFW_NSView mouseDown:] + 791
49  com.apple.AppKit              	0x00007fff35a25cd9 forwardMethod + 204
50  com.digidesign.framework.DFW  	0x00000001071a7295 -[DFW_NSTileView mouseDown:] + 41
51  com.apple.AppKit              	0x00007fff35a25cd9 forwardMethod + 204
52  com.apple.AppKit              	0x00007fff35a2c5f0 -[NSWindow(NSEventRouting) _handleMouseDownEvent:isDelayedEvent:] + 4914
53  com.apple.AppKit              	0x00007fff35996e21 -[NSWindow(NSEventRouting) _reallySendEvent:isDelayedEvent:] + 2612
54  com.apple.AppKit              	0x00007fff359961c9 -[NSWindow(NSEventRouting) sendEvent:] + 349
55  com.apple.AppKit              	0x00007fff35994554 -[NSApplication(NSEvent) sendEvent:] + 352
56  com.digidesign.framework.DFW  	0x00000001073be7ae -[DFW_NSApplication sendEvent:] + 2570
57  com.apple.AppKit              	0x00007fff357e15bf -[NSApplication run] + 707
58  com.digidesign.framework.DFW  	0x00000001073c1ba7 DFW_EventLoop::RunApplicationEventLoop() + 27
59  com.digidesign.framework.DFW  	0x00000001071c587a TApplication::Run() + 34
60  com.digidesign.framework.ProTools_Orange	0x0000000123419836 Launch_Pro_Tools(char*, bool) + 1613
61  com.digidesign.framework.ProTools_Orange	0x0000000123420651 LaunchProTools + 5688
62  com.avid.ProToolsDeveloper    	0x0000000106228738 main + 5544
63  libdyld.dylib                 	0x00007fff726fbcc9 start + 1

Something to do with my Markdown Panel?

Christoph Hart

@Dan-Korneff yes. Are you showing the panel on startup? You might want to try deferring that to show with a delay, it seems as the font rendering isn‘t ready yet (for whatever reason).

Dan Korneff

@Christoph-Hart it's not being displayed at startup, but the panel is being dynamically resized to fit the plugin dimensions.

EDIT: The Crash log above happened when I was dragging the plugin to a different insert.

Dan Korneff

@Christoph-Hart Here's the crash log that contains the random crashes I've been experiencing:

BUG IN CLIENT OF LIBPLATFORM: Unlock of an os_unfair_lock not owned by current thread

Crashed Thread:        0  Main Thread  Dispatch queue: com.apple.main-thread

Exception Type:        EXC_BAD_INSTRUCTION (SIGILL)
Exception Codes:       0x0000000000000001, 0x0000000000000000
Exception Note:        EXC_CORPSE_NOTIFY

Termination Signal:    Illegal instruction: 4
Termination Reason:    Namespace SIGNAL, Code 0x4
Terminating Process:   exc handler [1990]

Application Specific Information:
dyld: in dladdr()
BUG IN CLIENT OF LIBPLATFORM: Unlock of an os_unfair_lock not owned by current thread

Thread 0 Crashed:: Main Thread  Dispatch queue: com.apple.main-thread
0   libsystem_platform.dylib      	0x00007fff728fb655 _os_unfair_lock_unowned_abort + 23
1   libsystem_platform.dylib      	0x00007fff728f6aaf _os_unfair_lock_unlock_slow + 105
2   libsystem_pthread.dylib       	0x00007fff728fff53 _pthread_cond_check_init_slow + 206
3   libsystem_pthread.dylib       	0x00007fff728ffc98 pthread_cond_broadcast + 55
4   libc++.1.dylib                	0x00007fff6f9d6575 std::__1::condition_variable::notify_all() + 9
5   com.korneffaudio.myplug       	0x0000000141263052 juce::MessageManager::Lock::BlockingMessage::messageCallback() + 98
6   com.korneffaudio.myplug       	0x0000000141261146 juce::MessageQueue::deliverNextMessage() + 246
7   com.korneffaudio.myplug       	0x0000000141260ffe juce::MessageQueue::runLoopSourceCallback(void*) + 14
8   com.apple.CoreFoundation      	0x00007fff38592884 __CFRUNLOOP_IS_CALLING_OUT_TO_A_SOURCE0_PERFORM_FUNCTION__ + 17
9   com.apple.CoreFoundation      	0x00007fff38592823 __CFRunLoopDoSource0 + 103
10  com.apple.CoreFoundation      	0x00007fff3859263d __CFRunLoopDoSources0 + 209
11  com.apple.CoreFoundation      	0x00007fff38591359 __CFRunLoopRun + 937
12  com.apple.CoreFoundation      	0x00007fff38590953 CFRunLoopRunSpecific + 466
13  com.apple.HIToolbox           	0x00007fff371ababd RunCurrentEventLoopInMode + 292
14  com.apple.HIToolbox           	0x00007fff371ab7d5 ReceiveNextEventCommon + 584
15  com.apple.HIToolbox           	0x00007fff371ab579 _BlockUntilNextEventMatchingListInModeWithFilter + 64
16  com.apple.AppKit              	0x00007fff357f1039 _DPSNextEvent + 883
17  com.apple.AppKit              	0x00007fff357ef880 -[NSApplication(NSEvent) _nextEventMatchingEventMask:untilDate:inMode:dequeue:] + 1352
18  com.apple.AppKit              	0x00007fff357e158e -[NSApplication run] + 658
19  com.digidesign.framework.DFW  	0x0000000102b27ba7 DFW_EventLoop::RunApplicationEventLoop() + 27
20  com.digidesign.framework.DFW  	0x000000010292b87a TApplication::Run() + 34
21  com.digidesign.framework.ProTools_Orange	0x000000011e6b5836 Launch_Pro_Tools(char*, bool) + 1613
22  com.digidesign.framework.ProTools_Orange	0x000000011e6bc651 LaunchProTools + 5688
23  com.avid.ProToolsDeveloper    	0x0000000101997738 main + 5544
24  libdyld.dylib                 	0x00007fff726fbcc9 start + 1

Found this:
https://forum.juce.com/t/race-condition-i-e-crash-in-messagemanager-lock-with-fix/55870/4

And the fix:
https://github.com/juce-framework/JUCE/commit/33e81616ade84f40ccfec662c167b1b8dc772640

What do you suggest?

Dan Korneff

@Christoph-Hart should I try to cherry pick this JUCE commit? I'm not sure how different the message system is between 6 and 7....

Christoph Hart

@Dan-Korneff nice find! Yes, please try to cherry pick this, if it works, it would be awesome.

Dan Korneff

@Christoph-Hart I tried..

HISE\JUCE\modules\juce_events\messages\juce_MessageManager.cpp(295,22): error C2065: 'lock': undeclared identifier (compiling source file ..\..\JuceLibraryCode\include_juce_events.cpp) [Z:\Korneff Audio\Test Export\VST\Test Export\Binaries\Builds\VisualStudio2022\Test Export_SharedCode.vcxproj]

HISE\JUCE\modules\juce_events\messages\juce_MessageManager.cpp(300,1): error C4430: missing type specifier - int assumed. Note: C++ does not support default-int (compiling source file ..\..\JuceLibraryCode\include_juce_events.cpp) [Z:\Korneff Audio\Test Export\VST\Test Export\Binaries\Builds\VisualStudio2022\Test Export_SharedCode.vcxproj]

HISE\JUCE\modules\juce_events\messages\juce_MessageManager.cpp(300,26): error C2146: syntax error: missing ';' before identifier 'scope' (compiling source file ..\..\JuceLibraryCode\include_juce_events.cpp) [Z:\Korneff Audio\Test Export\VST\Test Export\Binaries\Builds\VisualStudio2022\Test Export_SharedCode.vcxproj]

HISE\JUCE\modules\juce_events\messages\juce_MessageManager.cpp(300,26): error C2065: 'scope': undeclared identifier (compiling source file ..\..\JuceLibraryCode\include_juce_events.cpp) [Z:\Korneff Audio\Test Export\VST\Test Export\Binaries\Builds\VisualStudio2022\Test Export_SharedCode.vcxproj]

HISE\JUCE\modules\juce_events\messages\juce_MessageManager.cpp(393,22): error C4430: missing type specifier - int assumed. Note: C++ does not support default-int (compiling source file ..\..\JuceLibraryCode\include_juce_events.cpp) [Z:\Korneff Audio\Test Export\VST\Test Export\Binaries\Builds\VisualStudio2022\Test Export_SharedCode.vcxproj]

HISE\JUCE\modules\juce_events\messages\juce_MessageManager.cpp(393,22): error C2146: syntax error: missing ';' before identifier 'scope' (compiling source file ..\..\JuceLibraryCode\include_juce_events.cpp) [Z:\Korneff Audio\Test Export\VST\Test Export\Binaries\Builds\VisualStudio2022\Test Export_SharedCode.vcxproj]

HISE\JUCE\modules\juce_events\messages\juce_MessageManager.cpp(393,22): error C2065: 'scope': undeclared identifier (compiling source file ..\..\JuceLibraryCode\include_juce_events.cpp) [Z:\Korneff Audio\Test Export\VST\Test Export\Binaries\Builds\VisualStudio2022\Test Export_SharedCode.vcxproj]

HISE\JUCE\modules\juce_events\messages\juce_MessageManager.cpp(409,22): error C4430: missing type specifier - int assumed. Note: C++ does not support default-int (compiling source file ..\..\JuceLibraryCode\i
nclude_juce_events.cpp) [Z:\Korneff Audio\Test Export\VST\Test Export\Binaries\Builds\VisualStudio2022\Test Export_SharedCode.vcxproj]

HISE\JUCE\modules\juce_events\messages\juce_MessageManager.cpp(409,22): error C2146: syntax error: missing ';' before identifier 'scope' (compiling source file ..\..\JuceLibraryCode\include_juce_events.cpp) [Z:\Korneff Audio\Test Export\VST\Test Export\Binaries\Builds\VisualStudio2022\Test Export_SharedCode.vcxproj]

HISE\JUCE\modules\juce_events\messages\juce_MessageManager.cpp(409,22): error C2065: 'scope': undeclared identifier (compiling source file ..\..\JuceLibraryCode\include_juce_events.cpp) [Z:\Korneff Audio\Test Export\VST\Test Export\Binaries\Builds\VisualStudio2022\Test Export_SharedCode.vcxproj]

Looks a bit more involved.

Christoph Hart

@Dan-Korneff alright, I‘ll take a look.

Dan Korneff

@Christoph-Hart greatly appreciated !

Christoph Hart

@Dan-Korneff OK, I've manually patched the files (and I needed to pull in another class from JUCE 7 to compile), however now I'm hitting a few weird assertions that I didn't before so I'm a bit uncomfortable pushing this "fix" - it might be possible that there are other changes to JUCE 7's message handling and this would be a Frankenstein thing.

Christoph Hart

@Christoph-Hart Following the JUCE discussion, this might be a "better" fix (in the sense that it's less intrusive than the JUCE 7 fix):

https://forum.juce.com/t/blockingmessage-accessing-messagemanager-lock-that-went-out-of-scope/51901

Dan Korneff

@Christoph-Hart I can give this a try:

        if (blockingMessage != nullptr)
         {
          {
         ScopedLock lock(blockingMessage->ownerCriticalSection);
             blockingMessage->owner.set(nullptr);
          }
             blockingMessage->releaseEvent.signal();
             blockingMessage = nullptr;
         }

Dan Korneff

@Christoph-Hart Do you have any plans to eventually bump to JUCE 7?

Dan Korneff

@Christoph-Hart Does this look right? It's throwing a bunch of errors.

void MessageManager::Lock::exit() const noexcept
{
    if (blockingMessage != nullptr)
    {
        {
            ScopedLock lock(blockingMessage->ownerCriticalSection);
            blockingMessage->owner.set(nullptr);
        }
        blockingMessage->releaseEvent.signal();
        blockingMessage = nullptr;
    }

    const ScopeGuard scope{ [&] { blockingMessage = nullptr; } };

    blockingMessage->stopWaiting();

    if (!blockingMessage->wasAcquired())
        return;

    if (auto* mm = MessageManager::instance)
    {
        jassert(mm->currentThreadHasLockedMessageManager());
        mm->threadWithLock = {};
    }
}

EDIT: operator error. This works:

void MessageManager::Lock::exit() const noexcept
{
    if (lockGained.compareAndSetBool (false, true))
    {
        auto* mm = MessageManager::instance;

        jassert (mm == nullptr || mm->currentThreadHasLockedMessageManager());
        lockGained.set (0);

        if (mm != nullptr)
            mm->threadWithLock = {};

        if (blockingMessage != nullptr)
        {
            {
                ScopedLock lock(blockingMessage->ownerCriticalSection);
                blockingMessage->owner.set(nullptr);
            }
            blockingMessage->releaseEvent.signal();
            blockingMessage = nullptr;
        }
    }
}

Testing now

Help with: Buffer_Not_Writeable_By_vImage

HISE | Docs

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