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|
extern crate backtrace;
extern crate findshlibs;
extern crate rustc_test as test;
use std::env;
use std::ffi::OsStr;
use std::path::Path;
use std::process::Command;
use backtrace::Backtrace;
use findshlibs::{IterationControl, SharedLibrary, TargetSharedLibrary};
use test::{ShouldPanic, TestDesc, TestDescAndFn, TestFn, TestName};
#[inline(never)]
fn make_trace() -> Vec<String> {
fn foo() -> Backtrace {
bar()
}
#[inline(never)]
fn bar() -> Backtrace {
baz()
}
#[inline(always)]
fn baz() -> Backtrace {
Backtrace::new_unresolved()
}
let mut base_addr = None;
TargetSharedLibrary::each(|lib| {
base_addr = Some(lib.virtual_memory_bias().0 as isize);
IterationControl::Break
});
let addrfix = -base_addr.unwrap();
let trace = foo();
trace
.frames()
.iter()
.take(5)
.map(|x| format!("{:p}", (x.ip() as *const u8).wrapping_offset(addrfix)))
.collect()
}
fn run_cmd<P: AsRef<OsStr>>(exe: P, me: &Path, flags: Option<&str>, trace: &str) -> String {
let mut cmd = Command::new(exe);
cmd.env("LC_ALL", "C"); // GNU addr2line is localized, we aren't
cmd.env("RUST_BACKTRACE", "1"); // if a child crashes, we want to know why
if let Some(flags) = flags {
cmd.arg(flags);
}
cmd.arg("--exe").arg(me).arg(trace);
let output = cmd.output().unwrap();
assert!(output.status.success());
String::from_utf8(output.stdout).unwrap()
}
fn run_test(flags: Option<&str>) {
let me = env::current_exe().unwrap();
let mut exe = me.clone();
assert!(exe.pop());
if exe.file_name().unwrap().to_str().unwrap() == "deps" {
assert!(exe.pop());
}
exe.push("examples");
exe.push("addr2line");
assert!(exe.is_file());
let trace = make_trace();
// HACK: GNU addr2line has a bug where looking up multiple addresses can cause the second
// lookup to fail. Workaround by doing one address at a time.
for addr in &trace {
let theirs = run_cmd("addr2line", &me, flags, addr);
let ours = run_cmd(&exe, &me, flags, addr);
// HACK: GNU addr2line does not tidy up paths properly, causing double slashes to be printed.
// We consider our behavior to be correct, so we fix their output to match ours.
let theirs = theirs.replace("//", "/");
assert!(
theirs == ours,
"Output not equivalent:
$ addr2line {0} --exe {1} {2}
{4}
$ {3} {0} --exe {1} {2}
{5}
",
flags.unwrap_or(""),
me.display(),
trace.join(" "),
exe.display(),
theirs,
ours
);
}
}
static FLAGS: &'static str = "aipsf";
fn make_tests() -> Vec<TestDescAndFn> {
(0..(1 << FLAGS.len()))
.map(|bits| {
if bits == 0 {
None
} else {
let mut param = String::new();
param.push('-');
for (i, flag) in FLAGS.chars().enumerate() {
if (bits & (1 << i)) != 0 {
param.push(flag);
}
}
Some(param)
}
})
.map(|param| TestDescAndFn {
desc: TestDesc {
name: TestName::DynTestName(format!(
"addr2line {}",
param.as_ref().map_or("", String::as_str)
)),
ignore: false,
should_panic: ShouldPanic::No,
allow_fail: false,
},
testfn: TestFn::DynTestFn(Box::new(move || {
run_test(param.as_ref().map(String::as_str))
})),
})
.collect()
}
fn main() {
if !cfg!(target_os = "linux") {
return;
}
let args: Vec<_> = env::args().collect();
test::test_main(&args, make_tests());
}
|
