476ea45c68
It is possible to link libunwind and use the normal backtrace code, but it fails to symbolize stack traces. I investigated and could get the list of instruction pointers and symbol names, but I'm not sure how to use the dwarf info to map from instruction pointer to source location. In any case, fixing this is probably not a high priority. See https://github.com/rust-lang/rust/issues/131738
117 lines
3.6 KiB
Rust
117 lines
3.6 KiB
Rust
// Check that backtrace info is correctly generated for dynamic libraries and is usable by a
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// rust binary.
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// Part of porting some backtrace tests to rustc: <https://github.com/rust-lang/rust/issues/122899>.
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// Original test:
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// <https://github.com/rust-lang/backtrace-rs/tree/6fa4b85b9962c3e1be8c2e5cc605cd078134152b/crates/dylib-dep>
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// ignore-tidy-linelength
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//@ ignore-android FIXME #17520
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//@ ignore-fuchsia Backtraces not symbolized
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//@ ignore-musl musl doesn't support dynamic libraries (at least when the original test was written).
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//@ needs-unwind
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//@ compile-flags: -g -Copt-level=0 -Cstrip=none -Cforce-frame-pointers=yes
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//@ ignore-emscripten Requires custom symbolization code
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//@ aux-crate: dylib_dep_helper=dylib-dep-helper.rs
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//@ aux-crate: auxiliary=dylib-dep-helper-aux.rs
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//@ run-pass
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#![allow(improper_ctypes)]
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#![allow(improper_ctypes_definitions)]
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extern crate dylib_dep_helper;
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extern crate auxiliary;
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use std::backtrace::Backtrace;
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macro_rules! pos {
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() => {
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(file!(), line!())
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};
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}
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#[collapse_debuginfo(yes)]
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macro_rules! check {
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($($pos:expr),*) => ({
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verify(&[$($pos,)* pos!()]);
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})
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}
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fn verify(filelines: &[Pos]) {
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let trace = Backtrace::capture();
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eprintln!("-----------------------------------");
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eprintln!("looking for:");
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for (file, line) in filelines.iter().rev() {
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eprintln!("\t{file}:{line}");
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}
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eprintln!("found:\n{trace:#?}");
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let mut iter = filelines.iter().rev();
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// FIXME(jieyouxu): use proper `BacktraceFrame` accessors when it becomes available. Right now,
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// this depends on the debug format of `Backtrace` which is of course fragile.
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let backtrace = format!("{:#?}", trace);
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while let Some((file, line)) = iter.next() {
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// FIXME(jieyouxu): make this test use proper accessors on `BacktraceFrames` once it has
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// them.
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assert!(backtrace.contains(file), "expected backtrace to contain {}", file);
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assert!(backtrace.contains(&line.to_string()), "expected backtrace to contain {}", line);
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}
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}
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type Pos = (&'static str, u32);
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extern "C" {
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#[link_name = "foo"]
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fn foo(p: Pos, cb: fn(Pos, Pos));
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}
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fn main() {
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std::env::set_var("RUST_BACKTRACE", "1");
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unsafe {
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foo(pos!(), |a, b| {
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check!(a, b)
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})
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}
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outer(pos!());
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}
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#[inline(never)]
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fn outer(main_pos: Pos) {
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inner(main_pos, pos!());
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inner_inlined(main_pos, pos!());
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}
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#[inline(never)]
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fn inner(main_pos: Pos, outer_pos: Pos) {
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check!(main_pos, outer_pos);
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check!(main_pos, outer_pos);
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let inner_pos = pos!(); auxiliary::callback(|aux_pos| {
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check!(main_pos, outer_pos, inner_pos, aux_pos);
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});
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let inner_pos = pos!(); auxiliary::callback_inlined(|aux_pos| {
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check!(main_pos, outer_pos, inner_pos, aux_pos);
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});
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}
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#[inline(always)]
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fn inner_inlined(main_pos: Pos, outer_pos: Pos) {
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check!(main_pos, outer_pos);
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check!(main_pos, outer_pos);
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#[inline(always)]
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fn inner_further_inlined(main_pos: Pos, outer_pos: Pos, inner_pos: Pos) {
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check!(main_pos, outer_pos, inner_pos);
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}
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inner_further_inlined(main_pos, outer_pos, pos!());
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let inner_pos = pos!(); auxiliary::callback(|aux_pos| {
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check!(main_pos, outer_pos, inner_pos, aux_pos);
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});
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let inner_pos = pos!(); auxiliary::callback_inlined(|aux_pos| {
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check!(main_pos, outer_pos, inner_pos, aux_pos);
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});
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// this tests a distinction between two independent calls to the inlined function.
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// (un)fortunately, LLVM somehow merges two consecutive such calls into one node.
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inner_further_inlined(main_pos, outer_pos, pos!());
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}
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