vendor/backtrace-0.3.3/examples/raw.rs

   1 extern crate backtrace;
   2
   3 fn main() {
   4     foo();
   5 }
   6
   7 fn foo() { bar() }
   8 fn bar() { baz() }
   9 fn baz() { print() }
  10
  11 #[cfg(target_pointer_width = "32")] const HEX_WIDTH: usize = 10;
  12 #[cfg(target_pointer_width = "64")] const HEX_WIDTH: usize = 20;
  13
  14 fn print() {
  15     let mut cnt = 0;
  16     backtrace::trace(|frame| {
  17         let ip = frame.ip();
  18         print!("frame #{:<2} - {:#02$x}", cnt, ip as usize, HEX_WIDTH);
  19         cnt += 1;
  20
  21         let mut resolved = false;
  22         backtrace::resolve(frame.ip(), |symbol| {
  23             if !resolved {
  24                 resolved = true;
  25             } else {
  26                 print!("{}", vec![" "; 7 + 2 + 3 + HEX_WIDTH].join(""));
  27             }
  28
  29             if let Some(name) = symbol.name() {
  30                 print!(" - {}", name);
  31             } else {
  32                 print!(" - <unknown>");
  33             }
  34             if let Some(file) = symbol.filename() {
  35                 if let Some(l) = symbol.lineno() {
  36                     print!("\n{:13}{:4$}@ {}:{}", "", "", file.display(), l,
  37                            HEX_WIDTH);
  38                 }
  39             }
  40             println!("");
  41
  42         });
  43         if !resolved {
  44             println!(" - <no info>");
  45         }
  46         true // keep going
  47     });
  48 }