1volatile int x;
2
3void __attribute__((noinline)) sink() {
4 x++; //% self.filecheck("bt", "main.cpp", "-implicit-check-not=artificial")
5 // CHECK: frame #0: 0x{{[0-9a-f]+}} a.out`sink() at main.cpp:[[@LINE-1]]:4
6 // CHECK-NEXT: func3{{.*}} [artificial]
7 // CHECK-NEXT: func1{{.*}} [artificial]
8 // CHECK-NEXT: main{{.*}}
9}
10
11void __attribute__((noinline)) func3() { sink(); /* tail */ }
12
13void __attribute__((noinline)) func2() { sink(); /* tail */ }
14
15void __attribute__((noinline)) func1() { func3(); /* tail */ }
16
17int __attribute__((disable_tail_calls)) main(int argc, char **) {
18 // The sequences `main -> func1 -> f{2,3} -> sink` are both plausible. Test
19 // that lldb picks the latter sequence.
20 func1();
21 return 0;
22}
23

source code of lldb/test/API/functionalities/tail_call_frames/disambiguate_tail_call_seq/main.cpp