2 // ignore-android FIXME #17520
3 // ignore-cloudabi spawning processes is not supported
4 // ignore-emscripten spawning processes is not supported
5 // ignore-openbsd no support for libbacktrace without filename
6 // ignore-sgx no processes
7 // ignore-msvc see #62897 and `backtrace-debuginfo.rs` test
11 use std::process::{Command, Stdio};
16 let _v = vec![1, 2, 3];
17 if env::var_os("IS_TEST").is_some() {
26 impl Drop for Double {
27 fn drop(&mut self) { panic!("twice") }
35 fn template(me: &str) -> Command {
36 let mut m = Command::new(me);
38 .stdout(Stdio::piped())
39 .stderr(Stdio::piped());
43 fn expected(fn_name: &str) -> String {
44 format!(" backtrace::{}", fn_name)
47 fn contains_verbose_expected(s: &str, fn_name: &str) -> bool {
48 // HACK(eddyb) work around the fact that verbosely demangled stack traces
49 // (from `RUST_BACKTRACE=full`, or, as is the case here, panic-in-panic)
50 // may contain symbols with hashes in them, i.e. `backtrace[...]::`.
51 let prefix = " backtrace";
52 let suffix = &format!("::{}", fn_name);
53 s.match_indices(prefix).any(|(i, _)| {
55 .trim_start_matches('[')
56 .trim_start_matches(char::is_alphanumeric)
57 .trim_start_matches(']')
62 fn runtest(me: &str) {
63 // Make sure that the stack trace is printed
64 let p = template(me).arg("fail").env("RUST_BACKTRACE", "1").spawn().unwrap();
65 let out = p.wait_with_output().unwrap();
66 assert!(!out.status.success());
67 let s = str::from_utf8(&out.stderr).unwrap();
68 assert!(s.contains("stack backtrace") && s.contains(&expected("foo")),
70 assert!(s.contains(" 0:"), "the frame number should start at 0");
72 // Make sure the stack trace is *not* printed
73 // (Remove RUST_BACKTRACE from our own environment, in case developer
74 // is running `make check` with it on.)
75 let p = template(me).arg("fail").env_remove("RUST_BACKTRACE").spawn().unwrap();
76 let out = p.wait_with_output().unwrap();
77 assert!(!out.status.success());
78 let s = str::from_utf8(&out.stderr).unwrap();
79 assert!(!s.contains("stack backtrace") && !s.contains(&expected("foo")),
80 "bad output2: {}", s);
82 // Make sure the stack trace is *not* printed
83 // (RUST_BACKTRACE=0 acts as if it were unset from our own environment,
84 // in case developer is running `make check` with it set.)
85 let p = template(me).arg("fail").env("RUST_BACKTRACE","0").spawn().unwrap();
86 let out = p.wait_with_output().unwrap();
87 assert!(!out.status.success());
88 let s = str::from_utf8(&out.stderr).unwrap();
89 assert!(!s.contains("stack backtrace") && !s.contains(" - foo"),
90 "bad output3: {}", s);
92 // Make sure a stack trace is printed
93 let p = template(me).arg("double-fail").spawn().unwrap();
94 let out = p.wait_with_output().unwrap();
95 assert!(!out.status.success());
96 let s = str::from_utf8(&out.stderr).unwrap();
97 // loosened the following from double::h to double:: due to
98 // spurious failures on mac, 32bit, optimized
99 assert!(s.contains("stack backtrace") && contains_verbose_expected(s, "double"),
100 "bad output3: {}", s);
102 // Make sure a stack trace isn't printed too many times
103 let p = template(me).arg("double-fail")
104 .env("RUST_BACKTRACE", "1").spawn().unwrap();
105 let out = p.wait_with_output().unwrap();
106 assert!(!out.status.success());
107 let s = str::from_utf8(&out.stderr).unwrap();
110 i += s[i + 10..].find("stack backtrace").unwrap() + 10;
112 assert!(s[i + 10..].find("stack backtrace").is_none(),
113 "bad output4: {}", s);
117 let args: Vec<String> = env::args().collect();
118 if args.len() >= 2 && args[1] == "fail" {
120 } else if args.len() >= 2 && args[1] == "double-fail" {