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// RUN: %check_clang_tidy %s llvmlibc-callee-namespace %t
namespace __llvm_libc {
namespace nested {
void nested_func() {}
} // namespace nested
void libc_api_func() {}
struct libc_api_struct {
int operator()() const { return 0; }
};
} // namespace __llvm_libc
// Emulate a function from the public headers like string.h
void libc_api_func() {}
// Emulate a function specifically allowed by the exception list.
void malloc() {}
// Emulate a non-trivially named symbol.
struct global_struct {
int operator()() const { return 0; }
};
namespace __llvm_libc {
void Test() {
// Allow calls with the fully qualified name.
__llvm_libc::libc_api_func();
__llvm_libc::nested::nested_func();
void (*qualifiedPtr)(void) = __llvm_libc::libc_api_func;
qualifiedPtr();
// Should not trigger on compiler provided function calls.
(void)__builtin_abs(-1);
// Bare calls are allowed as long as they resolve to the correct namespace.
libc_api_func();
nested::nested_func();
void (*barePtr)(void) = __llvm_libc::libc_api_func;
barePtr();
// Allow calling entities defined in the namespace.
__llvm_libc::libc_api_struct{}();
// Disallow calling into global namespace for implemented entrypoints.
::libc_api_func();
// CHECK-MESSAGES: :[[@LINE-1]]:3: warning: 'libc_api_func' must resolve to a function declared within the '__llvm_libc' namespace
// CHECK-MESSAGES: :15:6: note: resolves to this declaration
// Disallow indirect references to functions in global namespace.
void (*badPtr)(void) = ::libc_api_func;
badPtr();
// CHECK-MESSAGES: :[[@LINE-2]]:26: warning: 'libc_api_func' must resolve to a function declared within the '__llvm_libc' namespace
// CHECK-MESSAGES: :15:6: note: resolves to this declaration
// Allow calling into global namespace for specific functions.
::malloc();
// Disallow calling on entities that are not in the namespace, but make sure
// no crashes happen.
global_struct{}();
// CHECK-MESSAGES: :[[@LINE-1]]:18: warning: 'operator()' must resolve to a function declared within the '__llvm_libc' namespace
// CHECK-MESSAGES: :22:7: note: resolves to this declaration
}
} // namespace __llvm_libc
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