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-rw-r--r--clang/lib/StaticAnalyzer/Checkers/RetainCountChecker.cpp8
1 files changed, 8 insertions, 0 deletions
diff --git a/clang/lib/StaticAnalyzer/Checkers/RetainCountChecker.cpp b/clang/lib/StaticAnalyzer/Checkers/RetainCountChecker.cpp
index 13a4f87bd9d..26026dd9a26 100644
--- a/clang/lib/StaticAnalyzer/Checkers/RetainCountChecker.cpp
+++ b/clang/lib/StaticAnalyzer/Checkers/RetainCountChecker.cpp
@@ -1126,6 +1126,14 @@ RetainSummaryManager::getFunctionSummary(const FunctionDecl *FD) {
// correctly.
ScratchArgs = AF.add(ScratchArgs, 12, StopTracking);
S = getPersistentSummary(RetEffect::MakeNoRet(), DoNothing, DoNothing);
+ } else if (FName == "VTCompressionSessionEncodeFrame") {
+ // The context argument passed to VTCompressionSessionEncodeFrame()
+ // is passed to the callback specified when creating the session
+ // (e.g. with VTCompressionSessionCreate()) which can release it.
+ // To account for this possibility, conservatively stop tracking
+ // the context.
+ ScratchArgs = AF.add(ScratchArgs, 5, StopTracking);
+ S = getPersistentSummary(RetEffect::MakeNoRet(), DoNothing, DoNothing);
} else if (FName == "dispatch_set_context" ||
FName == "xpc_connection_set_context") {
// <rdar://problem/11059275> - The analyzer currently doesn't have
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