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// Copyright 2014 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.
use ffi::CStr;
use io::prelude::*;
use io;
use libc::{c_ulong, c_int, c_char, c_void};
use mem;
use sys::c;
use sys::dynamic_lib::DynamicLibrary;
use sys_common::backtrace::{output, output_fileline};
type SymFromAddrFn =
unsafe extern "system" fn(c::HANDLE, u64, *mut u64,
*mut c::SYMBOL_INFO) -> c::BOOL;
type SymGetLineFromAddr64Fn =
unsafe extern "system" fn(c::HANDLE, u64, *mut u32,
*mut c::IMAGEHLP_LINE64) -> c::BOOL;
pub fn print(w: &mut Write,
i: isize,
addr: u64,
process: c::HANDLE,
dbghelp: &DynamicLibrary)
-> io::Result<()> {
unsafe {
let SymFromAddr = sym!(dbghelp, "SymFromAddr", SymFromAddrFn);
let SymGetLineFromAddr64 = sym!(dbghelp,
"SymGetLineFromAddr64",
SymGetLineFromAddr64Fn);
let mut info: c::SYMBOL_INFO = mem::zeroed();
info.MaxNameLen = c::MAX_SYM_NAME as c_ulong;
// the struct size in C. the value is different to
// `size_of::<SYMBOL_INFO>() - MAX_SYM_NAME + 1` (== 81)
// due to struct alignment.
info.SizeOfStruct = 88;
let mut displacement = 0u64;
let ret = SymFromAddr(process, addr, &mut displacement, &mut info);
let name = if ret == c::TRUE {
let ptr = info.Name.as_ptr() as *const c_char;
Some(CStr::from_ptr(ptr).to_bytes())
} else {
None
};
try!(output(w, i, addr as usize as *mut c_void, name));
// Now find out the filename and line number
let mut line: c::IMAGEHLP_LINE64 = mem::zeroed();
line.SizeOfStruct = ::mem::size_of::<c::IMAGEHLP_LINE64>() as u32;
let mut displacement = 0u32;
let ret = SymGetLineFromAddr64(process, addr, &mut displacement, &mut line);
if ret == c::TRUE {
output_fileline(w,
CStr::from_ptr(line.Filename).to_bytes(),
line.LineNumber as c_int,
false)
} else {
Ok(())
}
}
}
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