src/libstd/sys/windows/printing/msvc.rs

   1 // Copyright 2014 The Rust Project Developers. See the COPYRIGHT
   2 // file at the top-level directory of this distribution and at
   3 // http://rust-lang.org/COPYRIGHT.
   4 //
   5 // Licensed under the Apache License, Version 2.0 <LICENSE-APACHE or
   6 // http://www.apache.org/licenses/LICENSE-2.0> or the MIT license
   7 // <LICENSE-MIT or http://opensource.org/licenses/MIT>, at your
   8 // option. This file may not be copied, modified, or distributed
   9 // except according to those terms.
  10
  11 #![allow(deprecated)]
  12
  13 use dynamic_lib::DynamicLibrary;
  14 use ffi::CStr;
  15 use io::prelude::*;
  16 use io;
  17 use libc::{c_ulong, c_int, c_char, c_void};
  18 use mem;
  19 use super::{SymFromAddrFn, SymGetLineFromAddr64Fn};
  20 use sys::c;
  21 use sys_common::backtrace::{output, output_fileline};
  22
  23 pub fn print(w: &mut Write, i: isize, addr: u64, dbghelp: &DynamicLibrary,
  24              process: c::HANDLE) -> io::Result<()> {
  25     let SymFromAddr = sym!(dbghelp, "SymFromAddr", SymFromAddrFn);
  26     let SymGetLineFromAddr64 = sym!(dbghelp, "SymGetLineFromAddr64", SymGetLineFromAddr64Fn);
  27
  28     let mut info: c::SYMBOL_INFO = unsafe { mem::zeroed() };
  29     info.MaxNameLen = c::MAX_SYM_NAME as c_ulong;
  30     // the struct size in C.  the value is different to
  31     // `size_of::<SYMBOL_INFO>() - MAX_SYM_NAME + 1` (== 81)
  32     // due to struct alignment.
  33     info.SizeOfStruct = 88;
  34
  35     let mut displacement = 0u64;
  36     let ret = SymFromAddr(process, addr, &mut displacement, &mut info);
  37
  38     let name = if ret == c::TRUE {
  39         let ptr = info.Name.as_ptr() as *const c_char;
  40         Some(unsafe { CStr::from_ptr(ptr).to_bytes() })
  41     } else {
  42         None
  43     };
  44
  45     try!(output(w, i, addr as usize as *mut c_void, name));
  46
  47     // Now find out the filename and line number
  48     let mut line: c::IMAGEHLP_LINE64 = unsafe { mem::zeroed() };
  49     line.SizeOfStruct = ::mem::size_of::<c::IMAGEHLP_LINE64>() as u32;
  50
  51     let mut displacement = 0u32;
  52     let ret = SymGetLineFromAddr64(process, addr, &mut displacement, &mut line);
  53     if ret == c::TRUE {
  54         output_fileline(w,
  55                         unsafe { CStr::from_ptr(line.Filename).to_bytes() },
  56                         line.LineNumber as c_int,
  57                         false)
  58     } else {
  59         Ok(())
  60     }
  61 }