This revision was automatically updated to reflect the committed changes. Closed by commit rC337212: [analyzer] Fix GCDAntipatternChecker to only fire when the semaphore is… (authored by george.karpenkov, committed by ). Herald added a subscriber: cfe-commits.
Repository: rC Clang https://reviews.llvm.org/D48911 Files: lib/StaticAnalyzer/Checkers/GCDAntipatternChecker.cpp test/Analysis/gcdantipatternchecker_test.m Index: test/Analysis/gcdantipatternchecker_test.m =================================================================== --- test/Analysis/gcdantipatternchecker_test.m +++ test/Analysis/gcdantipatternchecker_test.m @@ -333,3 +333,13 @@ }]; dispatch_semaphore_wait(sema1, 100); // expected-warning{{Waiting on a callback using a semaphore}} } + +void no_warn_on_nonzero_semaphore(MyInterface1 *M) { + dispatch_semaphore_t sema1 = dispatch_semaphore_create(1); + + [M acceptBlock:^{ + dispatch_semaphore_signal(sema1); + }]; + dispatch_semaphore_wait(sema1, 100); // no-warning +} + Index: lib/StaticAnalyzer/Checkers/GCDAntipatternChecker.cpp =================================================================== --- lib/StaticAnalyzer/Checkers/GCDAntipatternChecker.cpp +++ lib/StaticAnalyzer/Checkers/GCDAntipatternChecker.cpp @@ -93,7 +93,9 @@ static auto findGCDAntiPatternWithSemaphore() -> decltype(compoundStmt()) { const char *SemaphoreBinding = "semaphore_name"; - auto SemaphoreCreateM = callExpr(callsName("dispatch_semaphore_create")); + auto SemaphoreCreateM = callExpr(allOf( + callsName("dispatch_semaphore_create"), + hasArgument(0, ignoringParenCasts(integerLiteral(equals(0)))))); auto SemaphoreBindingM = anyOf( forEachDescendant(
Index: test/Analysis/gcdantipatternchecker_test.m =================================================================== --- test/Analysis/gcdantipatternchecker_test.m +++ test/Analysis/gcdantipatternchecker_test.m @@ -333,3 +333,13 @@ }]; dispatch_semaphore_wait(sema1, 100); // expected-warning{{Waiting on a callback using a semaphore}} } + +void no_warn_on_nonzero_semaphore(MyInterface1 *M) { + dispatch_semaphore_t sema1 = dispatch_semaphore_create(1); + + [M acceptBlock:^{ + dispatch_semaphore_signal(sema1); + }]; + dispatch_semaphore_wait(sema1, 100); // no-warning +} + Index: lib/StaticAnalyzer/Checkers/GCDAntipatternChecker.cpp =================================================================== --- lib/StaticAnalyzer/Checkers/GCDAntipatternChecker.cpp +++ lib/StaticAnalyzer/Checkers/GCDAntipatternChecker.cpp @@ -93,7 +93,9 @@ static auto findGCDAntiPatternWithSemaphore() -> decltype(compoundStmt()) { const char *SemaphoreBinding = "semaphore_name"; - auto SemaphoreCreateM = callExpr(callsName("dispatch_semaphore_create")); + auto SemaphoreCreateM = callExpr(allOf( + callsName("dispatch_semaphore_create"), + hasArgument(0, ignoringParenCasts(integerLiteral(equals(0)))))); auto SemaphoreBindingM = anyOf( forEachDescendant(
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