macOS: Memory leak in Cocoa_PumpEventsUntilDate

[pminev]

While checking some apps for leak, I've detected one is happening in our demo with SDL. The same behavior was observed when I ran asyncio-load-bitmaps example with the following command:

leaks --atExit -- ./build/examples/asyncio-load-bitmaps

Show leaks log

Process: asyncio-load-bitmaps [28526] Path: /Users/USER/*/asyncio-load-bitmaps Load Address: 0x102a74000 Identifier: asyncio-load-bitmaps Version: 0 Code Type: ARM64 Platform: macOS Parent Process: leaks [28525]

Date/Time: 2024-12-11 12:45:38.799 +0200
Launch Time: 2024-12-11 12:45:36.267 +0200
OS Version: macOS 15.1.1 (24B91)
Report Version: 7
Analysis Tool: /usr/bin/leaks

Physical footprint: 32.7M
Physical footprint (peak): 728.2M
Idle exit: untracked

leaks Report Version: 4.0, multi-line stacks
Process 28526: 73034 nodes malloced for 10294 KB
Process 28526: 1 leak for 32 total leaked bytes.

STACK OF 1 INSTANCE OF 'ROOT LEAK: ':
45 dyld 0x19f140274 start + 2840
44 asyncio-load-bitmaps 0x102a77d80 main + 48 SDL_main_impl.h:149
43 libSDL3.0.dylib 0x102f16190 SDL_RunApp + 60 SDL_dynapi_procs.h:804
42 libSDL3.0.dylib 0x102f2bbfc SDL_RunApp_DEFAULT + 64 SDL_dynapi_procs.h:804
41 libSDL3.0.dylib 0x102f7a538 SDL_RunApp_REAL + 88 SDL_runapp.c:40
40 asyncio-load-bitmaps 0x102a778e8 SDL_main + 64 SDL_main_impl.h:59
39 libSDL3.0.dylib 0x102f0e2d4 SDL_EnterAppMainCallbacks + 76 SDL_dynapi_procs.h:207
38 libSDL3.0.dylib 0x103176bf4 SDL_EnterAppMainCallbacks_REAL + 196 SDL_sysmain_callbacks.c:48
37 libSDL3.0.dylib 0x102f7a250 SDL_IterateMainCallbacks + 40 SDL_main_callbacks.c:125
36 libSDL3.0.dylib 0x102f34ef8 SDL_PumpEvents_REAL + 20 SDL_events.c:1413
35 libSDL3.0.dylib 0x102f34f60 SDL_PumpEventsInternal + 96 SDL_events.c:1369
34 libSDL3.0.dylib 0x103125880 Cocoa_PumpEvents + 80 SDL_cocoaevents.m:630
33 libSDL3.0.dylib 0x10312558c Cocoa_PumpEventsUntilDate + 272 SDL_cocoaevents.m:592
32 com.apple.AppKit 0x1a3a13e0c -[NSApplication(NSEventRouting) _nextEventMatchingEventMask:untilDate:inMode:dequeue:] + 688
31 com.apple.AppKit 0x1a30d3a08 _DPSNextEvent + 660
30 com.apple.HIToolbox 0x1aaa1deb8 _BlockUntilNextEventMatchingListInModeWithFilter + 76
29 com.apple.HIToolbox 0x1aaa1dbb4 ReceiveNextEventCommon + 220
28 com.apple.HIToolbox 0x1aaa17f64 RunCurrentEventLoopInMode + 292
27 com.apple.CoreFoundation 0x19f5a7bc4 CFRunLoopRunSpecific + 588
26 com.apple.CoreFoundation 0x19f5a89c0 __CFRunLoopRun + 1856
25 com.apple.CoreFoundation 0x19f5c2fd8 __CFRunLoopDoTimers + 356
24 com.apple.CoreFoundation 0x19f5c34c8 __CFRunLoopDoTimer + 1012
23 com.apple.CoreFoundation 0x19f5c3824 CFRUNLOOP_IS_CALLING_OUT_TO_A_TIMER_CALLBACK_FUNCTION + 32
22 com.apple.HIToolbox 0x1aaad27a8 CallMyActivateTSMDocument + 116
21 com.apple.HIToolbox 0x1aaab928c MyActivateTSMDocument + 2080
20 com.apple.HIToolbox 0x1aaabd574 utOpenActivateAllSelectedIMInDoc + 200
19 com.apple.CoreFoundation 0x19f56b004 CFArrayApplyFunction + 72
18 com.apple.HIToolbox 0x1aaabd6c4 utOpenActivateAllSelectedIMInDocIterator + 32
17 com.apple.HIToolbox 0x1aaabd8a0 utOpenActivateSelectedInputMethodInDoc + 256
16 com.apple.HIToolbox 0x1aaad5114 CreateInputMethodInstance + 364
15 com.apple.HIToolbox 0x1aaad5fb8 IMKInputSessionCreate + 268
14 com.apple.HIToolbox 0x1aaad6060 GetIMKClient(NSString*, bool, bool) + 120
13 com.apple.HIToolbox 0x1aab243cc -[IMKClient_Modern initWithBundleIdentifier:isIMKExtension:] + 136
12 libdispatch.dylib 0x19f311ea0 _dispatch_once_callout + 32
11 libdispatch.dylib 0x19f310658 _dispatch_client_callout + 20
10 com.apple.HIServices 0x1a5e8a5e4 _HIRLU_AddRunLoopModeForDeferredActions + 80
9 com.apple.HIServices 0x1a5e87ff8 +[HIRunLoopUtilities addRunLoopModesForDeferredActions:] + 132
8 com.apple.HIServices 0x1a5e88078 whileHoldingLockPerform(os_unfair_lock_s*, void () block_pointer) + 48
7 com.apple.HIServices 0x1a5e88124 __56+[HIRunLoopUtilities addRunLoopModesForDeferredActions:]_block_invoke + 92
6 com.apple.CoreFoundation 0x19f5b4930 -[__NSPlaceholderSet initWithSet:copyItems:] + 176
5 com.apple.CoreFoundation 0x19f5b4c2c -[NSSet initWithSet:copyItems:] + 568
4 com.apple.CoreFoundation 0x19f535f60 __NSSingleObjectSetI_new + 48
3 com.apple.CoreFoundation 0x19f530af8 __CFAllocateObject + 20
2 libobjc.A.dylib 0x19f0efa44 class_createInstance + 72
1 libsystem_malloc.dylib 0x19f2e7af8 _calloc + 88
0 libsystem_malloc.dylib 0x19f2fa9bc _malloc_zone_calloc_instrumented_or_legacy + 128

    1 (32 bytes) ROOT LEAK: <NSSet 0x133289860> [32]

I tried to wrap [Cocoa_PumpEventsUntilDate](https://github.com/libsdl-org/SDL/blob/7c5c88a3adb65f066a27b78714f1e4676107cd59/src/video/cocoa/SDL_cocoaevents.m#L577) in autoreleasepool but that didn't help. Since the leaked object was from [NSApp nextEventMatchingMask... function call I suppose it comes from apple libraries, but not completely sure.