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use ffi::CStr;
use io;
use libc::{c_ulong, c_int, c_char};
use mem;
use sys::c;
use sys::backtrace::BacktraceContext;
use sys_common::backtrace::Frame;
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 resolve_symname<F>(frame: Frame,
callback: F,
context: &BacktraceContext) -> io::Result<()>
where F: FnOnce(Option<&str>) -> io::Result<()>
{
let SymFromAddr = sym!(&context.dbghelp, "SymFromAddr", SymFromAddrFn)?;
unsafe {
let mut info: c::SYMBOL_INFO = mem::zeroed();
info.MaxNameLen = c::MAX_SYM_NAME as c_ulong;
info.SizeOfStruct = 88;
let mut displacement = 0u64;
let ret = SymFromAddr(context.handle,
frame.symbol_addr as u64,
&mut displacement,
&mut info);
let symname = if ret == c::TRUE {
let ptr = info.Name.as_ptr() as *const c_char;
CStr::from_ptr(ptr).to_str().ok()
} else {
None
};
callback(symname)
}
}
pub fn foreach_symbol_fileline<F>(frame: Frame,
mut f: F,
context: &BacktraceContext)
-> io::Result<bool>
where F: FnMut(&[u8], c_int) -> io::Result<()>
{
let SymGetLineFromAddr64 = sym!(&context.dbghelp,
"SymGetLineFromAddr64",
SymGetLineFromAddr64Fn)?;
unsafe {
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(context.handle,
frame.exact_position as u64,
&mut displacement,
&mut line);
if ret == c::TRUE {
let name = CStr::from_ptr(line.Filename).to_bytes();
f(name, line.LineNumber as c_int)?;
}
Ok(false)
}
}