clang/test/SemaCXX/attr-section.cpp

   1 // RUN: %clang_cc1 -verify -fsyntax-only -triple x86_64-linux-gnu %s
   2
   3 int x __attribute__((section(
   4    42)));  // expected-error {{expected string literal as argument of 'section' attribute}}
   5
   6
   7 // PR6007
   8 void test() {
   9   __attribute__((section("NEAR,x"))) int n1; // expected-error {{'section' attribute only applies to functions, global variables, Objective-C methods, and Objective-C properties}}
  10   __attribute__((section("NEAR,x"))) static int n2; // ok.
  11 }
  12
  13 // pr9356
  14 void __attribute__((section("foo"))) test2(); // expected-note {{previous attribute is here}}
  15 void __attribute__((section("bar"))) test2() {} // expected-warning {{section does not match previous declaration}}
  16
  17 enum __attribute__((section("NEAR,x"))) e { one }; // expected-error {{'section' attribute only applies to}}
  18
  19 extern int a; // expected-note {{previous declaration is here}}
  20 int *b = &a;
  21 extern int a __attribute__((section("foo,zed"))); // expected-warning {{section attribute is specified on redeclared variable}}
  22
  23 // Not a warning.
  24 extern int c;
  25 int c __attribute__((section("foo,zed")));
  26
  27 // Also OK.
  28 struct r_debug {};
  29 extern struct r_debug _r_debug;
  30 struct r_debug _r_debug __attribute__((nocommon, section(".r_debug,bar")));
  31
  32 namespace override {
  33   struct A {
  34     __attribute__((section("foo"))) virtual void f(){};
  35   };
  36   struct B : A {
  37     void f() {} // ok
  38   };
  39   struct C : A {
  40     __attribute__((section("bar"))) void f(); // expected-note {{previous}}
  41   };
  42   __attribute__((section("baz"))) // expected-warning {{section does not match}}
  43   void C::f() {}
  44 }
  45
  46 // Check for section type conflicts between global variables and function templates
  47 template <typename> __attribute__((section("template_fn1"))) void template_fn1() {} // expected-note {{declared here}}
  48 const int const_global_var __attribute__((section("template_fn1"))) = 42;           // expected-error {{'const_global_var' causes a section type conflict with 'template_fn1'}}
  49 int mut_global_var __attribute__((section("template_fn2"))) = 42;                   // expected-note {{declared here}}
  50 template <typename> __attribute__((section("template_fn2"))) void template_fn2() {} // expected-error {{'template_fn2' causes a section type conflict with 'mut_global_var'}}
  51
  52 namespace mutable_member {
  53 struct t1 {
  54   mutable int i;
  55 };
  56 extern const t1 v1;
  57 __attribute__((section("mutable_member"))) const t1 v1{};
  58 extern int i;
  59 __attribute__((section("mutable_member"))) int i{};
  60 } // namespace mutable_member
  61
  62 namespace non_trivial_ctor {
  63 struct t1 {
  64   t1();
  65   constexpr t1(int) { }
  66 };
  67 extern const t1 v1;
  68 __attribute__((section("non_trivial_ctor"))) const t1 v1; // expected-note {{declared here}}
  69 extern const t1 v2;
  70 __attribute__((section("non_trivial_ctor"))) const t1 v2{3}; // expected-error {{'v2' causes a section type conflict with 'v1'}}
  71 } // namespace non_trivial_ctor