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TheRock/compiler/amd-llvm/clang/test/Analysis/clang-suppress/macros.cpp
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// RUN: %clang_analyze_cc1 -analyzer-checker=core,debug.ExprInspection -verify %s
void clang_analyzer_warnIfReached();
// Systematic tests for [[clang::suppress]] interaction with macros.
//
// The fullyContains() function compares source ranges using
// SourceManager::isBeforeInTranslationUnit, which handles macro
// expansion locations. These tests verify that suppression works
// correctly when bugs are reported inside macro expansions.
// Placeholder type for triggering instantiations.
struct Type{};
// ============================================================================
// Group A: Bug inside macro, suppression outside (using warnIfReached)
// ============================================================================
#define WARN clang_analyzer_warnIfReached()
void macro_in_suppressed_block() {
[[clang::suppress]] {
WARN; // no-warning
}
}
void macro_in_unsuppressed_block() {
WARN; // expected-warning{{REACHABLE}}
}
// ============================================================================
// Group B: Function-like macro with expression
// ============================================================================
#define DO_WARN() clang_analyzer_warnIfReached()
void funclike_macro_suppressed() {
[[clang::suppress]] {
DO_WARN(); // no-warning
}
}
void funclike_macro_unsuppressed() {
DO_WARN(); // expected-warning{{REACHABLE}}
}
// ============================================================================
// Group C: Nested macros
// ============================================================================
#define INNER_WARN() clang_analyzer_warnIfReached()
#define OUTER_WARN() INNER_WARN()
void nested_macro_suppressed() {
[[clang::suppress]] {
OUTER_WARN(); // no-warning
}
}
void nested_macro_unsuppressed() {
OUTER_WARN(); // expected-warning{{REACHABLE}}
}
// ============================================================================
// Group D: Macro defining entire function body
// ============================================================================
#define BUGGY_BODY { clang_analyzer_warnIfReached(); }
[[clang::suppress]] void func_with_macro_body()
BUGGY_BODY // no-warning
void func_with_macro_body_unsuppressed()
BUGGY_BODY // expected-warning{{REACHABLE}}
// ============================================================================
// Group E: Macro in suppressed class method
// ============================================================================
struct [[clang::suppress]] MacroInSuppressedClass {
void method() {
WARN; // no-warning
}
};
struct MacroInUnsuppressedClass {
void method() {
WARN; // expected-warning{{REACHABLE}}
}
};
void test_E() {
MacroInSuppressedClass().method();
MacroInUnsuppressedClass().method();
}
// ============================================================================
// Group F: Macro expanding to suppression attribute + code
// ============================================================================
#define SUPPRESS_AND_WARN [[clang::suppress]] clang_analyzer_warnIfReached()
void macro_suppression_wrapper() {
SUPPRESS_AND_WARN; // no-warning
}
// ============================================================================
// Group G: Macro in template context
// ============================================================================
template <typename T>
struct [[clang::suppress]] MacroInTemplate {
void method() {
WARN; // no-warning
}
};
template <typename T>
struct MacroInTemplate_NoAttr {
void method() {
WARN; // expected-warning{{REACHABLE}}
}
};
void test_G() {
MacroInTemplate<Type>().method();
MacroInTemplate_NoAttr<Type>().method();
}
// ============================================================================
// Group H: Null dereference through direct null, suppressed at statement level
// ============================================================================
int macro_deref_suppressed() {
int *p = 0;
[[clang::suppress]] return *p; // no-warning
}
int macro_deref_unsuppressed() {
int *p = 0;
return *p; // expected-warning{{Dereference of null pointer (loaded from variable 'p')}}
}
// ============================================================================
// Group I: Stringification and token pasting (shouldn't affect suppression)
// ============================================================================
#define STRINGIFY(x) #x
#define CONCAT(a, b) a##b
void stringify_suppressed() {
[[clang::suppress]] {
const char *s = STRINGIFY(hello);
(void)s;
int CONCAT(var, 1) = 0;
clang_analyzer_warnIfReached(); // no-warning
(void)var1;
}
}
void stringify_unsuppressed() {
const char *s = STRINGIFY(hello);
(void)s;
int CONCAT(var, 1) = 0;
clang_analyzer_warnIfReached(); // expected-warning{{REACHABLE}}
(void)var1;
}
// ============================================================================
// Group J: Multi-line macro with warnIfReached
// ============================================================================
#define MULTI_LINE_WARN \
do { \
clang_analyzer_warnIfReached(); \
} while (0)
void multiline_macro_suppressed() {
[[clang::suppress]] {
MULTI_LINE_WARN; // no-warning
}
}
void multiline_macro_unsuppressed() {
MULTI_LINE_WARN; // expected-warning{{REACHABLE}}
}