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: func2{{.*}} [artificial]
7 // CHECK-NEXT: main{{.*}}
8}
9
10void __attribute__((noinline)) func2() {
11 sink(); /* tail */
12}
13
14void __attribute__((noinline)) func1() { sink(); /* tail */ }
15
16int __attribute__((disable_tail_calls)) main(int argc, char **) {
17 // The sequences `main -> f{1,2} -> sink` are both plausible. Test that
18 // return-pc call site info allows lldb to pick the correct sequence.
19 func2();
20 if (argc == 100)
21 func1();
22 return 0;
23}
24

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