george.karpenkov created this revision.
Herald added a reviewer: EricWF.
Herald added subscribers: szepet, xazax.hun, javed.absar.
Addresses https://bugs.llvm.org/show_bug.cgi?id=35075
https://reviews.llvm.org/D39518
Files:
lib/Analysis/BodyFarm.cpp
test/Analysis/call_once.cpp
Index: test/Analysis/call_once.cpp
===================================================================
--- test/Analysis/call_once.cpp
+++ test/Analysis/call_once.cpp
@@ -1,6 +1,10 @@
// RUN: %clang_analyze_cc1 -std=c++11 -fblocks
-analyzer-checker=core,debug.ExprInspection -verify %s
// RUN: %clang_analyze_cc1 -std=c++11 -fblocks
-analyzer-checker=core,debug.ExprInspection -DEMULATE_LIBSTDCPP -verify %s
+// We do not emulate libcxx03 implementation, but we should not crash either.
+// RUN: %clang_analyze_cc1 -std=c++11 -fblocks -analyzer-checker=core
-DEMULATE_LIBCXX03 %s
+// RUN: %clang_analyze_cc1 -std=c++11 -fblocks -analyzer-checker=core
-DEMULATE_LIBCXX03 -DEMULATE_LIBSTDCPP %s
+
void clang_analyzer_eval(bool);
// Faking std::std::call_once implementation.
@@ -16,8 +20,13 @@
} once_flag;
#endif
+#ifndef EMULATE_LIBCXX03
template <class Callable, class... Args>
void call_once(once_flag &o, Callable&& func, Args&&... args) {};
+#else
+template <class Callable, class... Args> // libcxx03 call_once
+void call_once(once_flag &o, Callable func, Args...) {};
+#endif
} // namespace std
Index: lib/Analysis/BodyFarm.cpp
===================================================================
--- lib/Analysis/BodyFarm.cpp
+++ lib/Analysis/BodyFarm.cpp
@@ -412,10 +412,15 @@
CallbackCall = create_call_once_lambda_call(C, M, Callback,
CallbackRecordDecl, CallArgs);
- } else {
+ } else if (Callback->getType()->isRValueReferenceType()
+ || Callback->getType()->isLValueReferenceType()) {
// Function pointer case.
CallbackCall = create_call_once_funcptr_call(C, M, Callback, CallArgs);
+ } else {
+ DEBUG(llvm::dbgs() << "Not a lambda expression, and not a function pointer"
+ << ", ignoring the std::call_once call.\n");
+ return nullptr;
}
DeclRefExpr *FlagDecl =
Index: test/Analysis/call_once.cpp
===================================================================
--- test/Analysis/call_once.cpp
+++ test/Analysis/call_once.cpp
@@ -1,6 +1,10 @@
// RUN: %clang_analyze_cc1 -std=c++11 -fblocks -analyzer-checker=core,debug.ExprInspection -verify %s
// RUN: %clang_analyze_cc1 -std=c++11 -fblocks -analyzer-checker=core,debug.ExprInspection -DEMULATE_LIBSTDCPP -verify %s
+// We do not emulate libcxx03 implementation, but we should not crash either.
+// RUN: %clang_analyze_cc1 -std=c++11 -fblocks -analyzer-checker=core -DEMULATE_LIBCXX03 %s
+// RUN: %clang_analyze_cc1 -std=c++11 -fblocks -analyzer-checker=core -DEMULATE_LIBCXX03 -DEMULATE_LIBSTDCPP %s
+
void clang_analyzer_eval(bool);
// Faking std::std::call_once implementation.
@@ -16,8 +20,13 @@
} once_flag;
#endif
+#ifndef EMULATE_LIBCXX03
template <class Callable, class... Args>
void call_once(once_flag &o, Callable&& func, Args&&... args) {};
+#else
+template <class Callable, class... Args> // libcxx03 call_once
+void call_once(once_flag &o, Callable func, Args...) {};
+#endif
} // namespace std
Index: lib/Analysis/BodyFarm.cpp
===================================================================
--- lib/Analysis/BodyFarm.cpp
+++ lib/Analysis/BodyFarm.cpp
@@ -412,10 +412,15 @@
CallbackCall = create_call_once_lambda_call(C, M, Callback,
CallbackRecordDecl, CallArgs);
- } else {
+ } else if (Callback->getType()->isRValueReferenceType()
+ || Callback->getType()->isLValueReferenceType()) {
// Function pointer case.
CallbackCall = create_call_once_funcptr_call(C, M, Callback, CallArgs);
+ } else {
+ DEBUG(llvm::dbgs() << "Not a lambda expression, and not a function pointer"
+ << ", ignoring the std::call_once call.\n");
+ return nullptr;
}
DeclRefExpr *FlagDecl =
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