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fix: stub MLKit Clearcut at LogWriter level + synthesize missing class method (v4.15.3)
v4.15.2 only stubbed -[MLKITx_CCTClearcutLogger log:completion:]. Kima's
crash stack actually entered telemetry via
-[MLKITx_CCTLogWriter writeLog:pseudonymousID:logDirectory:clock:
logTransformers:completionQueue:completion:]
directly — bypassing the Logger entry point we'd stubbed. The crash then
propagates down to the missing
+[MLKITx_CCTClearcutFileUtility computeUrlForLogContextDir:context:bundleId:]
class method.
v4.15.3 adds two more defenses:
1. Stub -[MLKITx_CCTLogWriter writeLog:...] to a no-op that invokes
the completion handler (dispatching onto completionQueue if the
caller supplied one, to preserve semantics).
2. As a belt-and-braces fallback, if callers reach the FileUtility
anyway, install a class method on MLKITx_CCTClearcutFileUtility for
computeUrlForLogContextDir:context:bundleId: that returns the input
directory unchanged — satisfies the selector lookup so we don't
raise NSInvalidArgumentException even if the rest of the chain runs.
Each stub has its own installed-flag so partial success on the first
attempt still leaves the other stubs to retry on the second attempt
(+load vs mlkit_set_resource_dir).
Version 4.15.3.
Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>
author
virtualintern
co-author
Claude Opus 4.7 (1M context)
date
(Apr 22, 2026, 6:35 PM +0300)
commit
1ee9e5cf
1ee9e5cfd0d4875b75f91e03d9f29d4008b8cf38
parent
f2986055
f298605556291777afd9d5a5fb051e7d015178ca
+95
-12
+1
-1
posedetection/build.gradle.kts
+1
-1
posedetection/build.gradle.kts
···
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mavenPublishing {
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publishToMavenCentral(SonatypeHost.CENTRAL_PORTAL)
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-
coordinates("com.performancecoachlab.posedetection", "posedetection-compose", "4.15.2")
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+
coordinates("com.performancecoachlab.posedetection", "posedetection-compose", "4.15.3")
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pom {
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name.set("Pose Detection")
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-11
posedetection/src/nativeInterop/mlkitRedirect/MLKitResourceRedirect.m
+94
-11
posedetection/src/nativeInterop/mlkitRedirect/MLKitResourceRedirect.m
···
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static NSString *_mlkitResourceDir = nil;
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// Install the Clearcut-telemetry no-op swizzle. Safe to call multiple times —
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// once it actually lands the stub, a flag short-circuits future attempts.
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// Install MLKit telemetry stubs. Safe to call multiple times.
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// Runs at two points: during +load (MLKit classes may not be registered yet,
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// in which case we silently skip and retry), and from mlkit_set_resource_dir
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// (called by Kotlin after app init — all classes definitely loaded by then).
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// Each stub has its own "installed" flag so partial success on the first
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// attempt still leaves work for the second.
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static void _pd_mlkit_noop_log(id, SEL, id, id);
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static BOOL _pd_clearcut_stubbed = NO;
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static void _pd_mlkit_noop_writelog(id, SEL, id, id, id, id, id, id, id);
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static id _pd_mlkit_compute_url(Class, SEL, id, id, id);
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+
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static BOOL _pd_logger_stubbed = NO;
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static BOOL _pd_writer_stubbed = NO;
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static BOOL _pd_fileutil_stubbed = NO;
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+
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static void _pd_install_clearcut_stub(void) {
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if (_pd_clearcut_stubbed) return;
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Class clearcut = NSClassFromString(@"MLKITx_CCTClearcutLogger");
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if (!clearcut) return;
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Method logM = class_getInstanceMethod(clearcut,
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@selector(log:completion:));
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if (!logM) return;
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method_setImplementation(logM, (IMP)_pd_mlkit_noop_log);
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_pd_clearcut_stubbed = YES;
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// 1. -[MLKITx_CCTClearcutLogger log:completion:] (high-level entry)
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if (!_pd_logger_stubbed) {
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Class logger = NSClassFromString(@"MLKITx_CCTClearcutLogger");
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if (logger) {
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Method m = class_getInstanceMethod(logger,
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@selector(log:completion:));
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if (m) {
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method_setImplementation(m, (IMP)_pd_mlkit_noop_log);
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_pd_logger_stubbed = YES;
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}
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}
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}
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// 2. -[MLKITx_CCTLogWriter writeLog:pseudonymousID:logDirectory:clock:
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// logTransformers:completionQueue:completion:]
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// Some callers bypass the Logger and hit the LogWriter directly —
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// which is the path kima's crash stack showed.
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if (!_pd_writer_stubbed) {
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Class writer = NSClassFromString(@"MLKITx_CCTLogWriter");
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if (writer) {
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Method m = class_getInstanceMethod(writer,
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@selector(writeLog:pseudonymousID:logDirectory:clock:logTransformers:completionQueue:completion:));
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if (m) {
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method_setImplementation(m, (IMP)_pd_mlkit_noop_writelog);
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_pd_writer_stubbed = YES;
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}
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}
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}
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// 3. Fallback: if neither stub fires and something reaches
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// +[MLKITx_CCTClearcutFileUtility computeUrlForLogContextDir:context:
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// bundleId:], make that class method respond instead of throwing.
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if (!_pd_fileutil_stubbed) {
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Class fileutil = NSClassFromString(@"MLKITx_CCTClearcutFileUtility");
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if (fileutil) {
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SEL sel = @selector(computeUrlForLogContextDir:context:bundleId:);
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// Try to override the existing method impl if there IS one; if
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// not (this is what causes the original crash — the class method
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// table has lost the entry), add it via the metaclass.
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Method existing = class_getClassMethod(fileutil, sel);
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if (existing) {
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method_setImplementation(existing, (IMP)_pd_mlkit_compute_url);
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_pd_fileutil_stubbed = YES;
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} else {
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Class meta = object_getClass((id)fileutil);
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if (meta && class_addMethod(meta, sel,
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(IMP)_pd_mlkit_compute_url,
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"@@:@@@")) {
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_pd_fileutil_stubbed = YES;
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}
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}
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}
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}
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}
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__attribute__((visibility("default")))
···
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void (^block)(BOOL, NSError *) = completion;
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block(YES, nil);
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}
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}
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// No-op replacement for the 7-arg LogWriter writeLog. Some callers bypass
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// CCTClearcutLogger and call CCTLogWriter directly — stubbing only the
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// Logger isn't enough. This signature matches the actual method:
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// -[MLKITx_CCTLogWriter writeLog:pseudonymousID:logDirectory:clock:
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// logTransformers:completionQueue:completion:]
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static void _pd_mlkit_noop_writelog(id self, SEL _cmd,
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id log, id pid, id logDir, id clock,
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id transformers, id completionQueue,
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id completion) {
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if (completion) {
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void (^block)(BOOL, NSError *) = completion;
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if (completionQueue) {
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// Preserve semantics: callers typically want the completion
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// delivered on their queue. dispatch_async into it, else call
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// inline.
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dispatch_async((dispatch_queue_t)completionQueue, ^{
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block(YES, nil);
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});
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} else {
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block(YES, nil);
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}
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}
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}
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+
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// Fallback for the missing +[MLKITx_CCTClearcutFileUtility
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// computeUrlForLogContextDir:context:bundleId:] class method. Return the
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// logContextDir NSURL unchanged — good enough to satisfy any caller that
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// slips past our writeLog stub.
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static id _pd_mlkit_compute_url(Class self, SEL _cmd,
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id logContextDir, id context, id bundleId) {
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return logContextDir;
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}
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@interface NSBundle (PoseDetectionMLKitRedirect)