Files
rust/src/libstd/sys/unix/backtrace/printing/mod.rs
kennytm 7169fe57d6 Fallback to dladdr-based resolve_symbol if backtrace failed.
This programs compiled without -g on macOS still provide the resolve to
actual symbols, instead of `<unknown>` everywhere.
2017-09-02 03:24:17 +08:00

44 lines
1.3 KiB
Rust

// Copyright 2014-2017 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.
mod dladdr;
use sys::backtrace::BacktraceContext;
use sys_common::backtrace::Frame;
use io;
#[cfg(target_os = "emscripten")]
pub use self::dladdr::resolve_symname;
#[cfg(target_os = "emscripten")]
pub fn foreach_symbol_fileline<F>(_: Frame, _: F, _: &BacktraceContext) -> io::Result<bool>
where
F: FnMut(&[u8], ::libc::c_int) -> io::Result<()>
{
Ok(false)
}
#[cfg(not(target_os = "emscripten"))]
pub use sys_common::gnu::libbacktrace::foreach_symbol_fileline;
#[cfg(not(target_os = "emscripten"))]
pub fn resolve_symname<F>(frame: Frame, callback: F, bc: &BacktraceContext) -> io::Result<()>
where
F: FnOnce(Option<&str>) -> io::Result<()>
{
::sys_common::gnu::libbacktrace::resolve_symname(frame, |symname| {
if symname.is_some() {
callback(symname)
} else {
dladdr::resolve_symname(frame, callback, bc)
}
}, bc)
}