# backtrace-rs
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[Documentation](http://alexcrichton.com/backtrace-rs)
A library for acquiring backtraces at runtime for Rust. This library aims to
enhance the support given by the standard library at `std::rt` by providing a
more stable and programmatic interface.
## Install
```toml
[dependencies]
backtrace = "0.3"
```
```rust
extern crate backtrace;
```
Note that this crate requires `make`, `objcopy`, and `ar` to be present on Linux
systems.
## Usage
To simply capture a backtrace and defer dealing with it until a later time,
you can use the top-level `Backtrace` type.
```rust
extern crate backtrace;
use backtrace::Backtrace;
fn main() {
let bt = Backtrace::new();
// do_some_work();
println!("{:?}", bt);
}
```
If, however, you'd like more raw access to the actual tracing functionality, you
can use the `trace` and `resolve` functions directly.
```rust
extern crate backtrace;
fn main() {
backtrace::trace(|frame| {
let ip = frame.ip();
let symbol_address = frame.symbol_address();
// Resolve this instruction pointer to a symbol name
backtrace::resolve(ip, |symbol| {
if let Some(name) = symbol.name() {
// ...
}
if let Some(filename) = symbol.filename() {
// ...
}
});
true // keep going to the next frame
});
}
```
## Platform Support
This library currently supports OSX, Linux, and Windows. Support for other
platforms is always welcome!
# License
This project is licensed under either of
* Apache License, Version 2.0, ([LICENSE-APACHE](LICENSE-APACHE) or
http://www.apache.org/licenses/LICENSE-2.0)
* MIT license ([LICENSE-MIT](LICENSE-MIT) or
http://opensource.org/licenses/MIT)
at your option.
### Contribution
Unless you explicitly state otherwise, any contribution intentionally submitted
for inclusion in backtrace-rs by you, as defined in the Apache-2.0 license, shall be
dual licensed as above, without any additional terms or conditions.