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// Copyright 2014 The Rust Project Developers. See the COPYRIGHT
// file at the top-level directory of this distribution and at
// http://rust-lang.org/COPYRIGHT.
//
// Licensed under the Apache License, Version 2.0 <LICENSE-APACHE or
// http://www.apache.org/licenses/LICENSE-2.0> or the MIT license
// <LICENSE-MIT or http://opensource.org/licenses/MIT>, at your
// option. This file may not be copied, modified, or distributed
// except according to those terms.
// ignore-android FIXME #17520
// ignore-emscripten spawning processes is not supported
// ignore-openbsd no support for libbacktrace without filename
// compile-flags:-g
use std::env;
use std::process::{Command, Stdio};
use std::str;
#[inline(never)]
fn foo() {
let _v = vec![1, 2, 3];
if env::var_os("IS_TEST").is_some() {
panic!()
}
}
#[inline(never)]
fn double() {
struct Double;
impl Drop for Double {
fn drop(&mut self) { panic!("twice") }
}
let _d = Double;
panic!("once");
}
fn template(me: &str) -> Command {
let mut m = Command::new(me);
m.env("IS_TEST", "1")
.stdout(Stdio::piped())
.stderr(Stdio::piped());
return m;
}
fn expected(fn_name: &str) -> String {
format!(" - backtrace::{}", fn_name)
}
fn runtest(me: &str) {
// Make sure that the stack trace is printed
let p = template(me).arg("fail").env("RUST_BACKTRACE", "1").spawn().unwrap();
let out = p.wait_with_output().unwrap();
assert!(!out.status.success());
let s = str::from_utf8(&out.stderr).unwrap();
assert!(s.contains("stack backtrace") && s.contains(&expected("foo")),
"bad output: {}", s);
// Make sure the stack trace is *not* printed
// (Remove RUST_BACKTRACE from our own environment, in case developer
// is running `make check` with it on.)
let p = template(me).arg("fail").env_remove("RUST_BACKTRACE").spawn().unwrap();
let out = p.wait_with_output().unwrap();
assert!(!out.status.success());
let s = str::from_utf8(&out.stderr).unwrap();
assert!(!s.contains("stack backtrace") && !s.contains(&expected("foo")),
"bad output2: {}", s);
// Make sure the stack trace is *not* printed
// (RUST_BACKTRACE=0 acts as if it were unset from our own environment,
// in case developer is running `make check` with it set.)
let p = template(me).arg("fail").env("RUST_BACKTRACE","0").spawn().unwrap();
let out = p.wait_with_output().unwrap();
assert!(!out.status.success());
let s = str::from_utf8(&out.stderr).unwrap();
assert!(!s.contains("stack backtrace") && !s.contains(" - foo"),
"bad output3: {}", s);
// Make sure a stack trace is printed
let p = template(me).arg("double-fail").spawn().unwrap();
let out = p.wait_with_output().unwrap();
assert!(!out.status.success());
let s = str::from_utf8(&out.stderr).unwrap();
// loosened the following from double::h to double:: due to
// spurious failures on mac, 32bit, optimized
assert!(s.contains("stack backtrace") && s.contains(&expected("double")),
"bad output3: {}", s);
// Make sure a stack trace isn't printed too many times
let p = template(me).arg("double-fail")
.env("RUST_BACKTRACE", "1").spawn().unwrap();
let out = p.wait_with_output().unwrap();
assert!(!out.status.success());
let s = str::from_utf8(&out.stderr).unwrap();
let mut i = 0;
for _ in 0..2 {
i += s[i + 10..].find("stack backtrace").unwrap() + 10;
}
assert!(s[i + 10..].find("stack backtrace").is_none(),
"bad output4: {}", s);
}
fn main() {
if cfg!(windows) && cfg!(target_env = "gnu") {
return
}
let args: Vec<String> = env::args().collect();
if args.len() >= 2 && args[1] == "fail" {
foo();
} else if args.len() >= 2 && args[1] == "double-fail" {
double();
} else {
runtest(&args[0]);
}
}
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