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#![allow(bad_style)]
use super::super::{backtrace::StackFrame, dbghelp, windows::*};
use super::{BytesOrWideString, ResolveWhat, SymbolName};
use core::char;
use core::ffi::c_void;
use core::marker;
use core::mem;
use core::slice;
pub struct Symbol<'a> {
name: *const [u8],
addr: *mut c_void,
line: Option<u32>,
filename: Option<*const [u16]>,
#[cfg(feature = "std")]
_filename_cache: Option<::std::ffi::OsString>,
#[cfg(not(feature = "std"))]
_filename_cache: (),
_marker: marker::PhantomData<&'a i32>,
}
impl Symbol<'_> {
pub fn name(&self) -> Option<SymbolName<'_>> {
Some(SymbolName::new(unsafe { &*self.name }))
}
pub fn addr(&self) -> Option<*mut c_void> {
Some(self.addr as *mut _)
}
pub fn filename_raw(&self) -> Option<BytesOrWideString<'_>> {
self.filename
.map(|slice| unsafe { BytesOrWideString::Wide(&*slice) })
}
pub fn colno(&self) -> Option<u32> {
None
}
pub fn lineno(&self) -> Option<u32> {
self.line
}
#[cfg(feature = "std")]
pub fn filename(&self) -> Option<&::std::path::Path> {
use std::path::Path;
self._filename_cache.as_ref().map(Path::new)
}
}
#[repr(C, align(8))]
struct Aligned8<T>(T);
pub unsafe fn resolve(what: ResolveWhat<'_>, cb: &mut dyn FnMut(&super::Symbol)) {
let dbghelp = match dbghelp::init() {
Ok(dbghelp) => dbghelp,
Err(()) => return,
};
match what {
ResolveWhat::Address(_) => resolve_without_inline(&dbghelp, what.address_or_ip(), cb),
ResolveWhat::Frame(frame) => match &frame.inner.stack_frame {
StackFrame::New(frame) => resolve_with_inline(&dbghelp, frame, cb),
StackFrame::Old(_) => resolve_without_inline(&dbghelp, frame.ip(), cb),
},
}
}
unsafe fn resolve_with_inline(
dbghelp: &dbghelp::Init,
frame: &STACKFRAME_EX,
cb: &mut dyn FnMut(&super::Symbol),
) {
do_resolve(
|info| {
dbghelp.SymFromInlineContextW()(
GetCurrentProcess(),
super::adjust_ip(frame.AddrPC.Offset as *mut _) as u64,
frame.InlineFrameContext,
&mut 0,
info,
)
},
|line| {
dbghelp.SymGetLineFromInlineContextW()(
GetCurrentProcess(),
super::adjust_ip(frame.AddrPC.Offset as *mut _) as u64,
frame.InlineFrameContext,
0,
&mut 0,
line,
)
},
cb,
)
}
unsafe fn resolve_without_inline(
dbghelp: &dbghelp::Init,
addr: *mut c_void,
cb: &mut dyn FnMut(&super::Symbol),
) {
do_resolve(
|info| dbghelp.SymFromAddrW()(GetCurrentProcess(), addr as DWORD64, &mut 0, info),
|line| dbghelp.SymGetLineFromAddrW64()(GetCurrentProcess(), addr as DWORD64, &mut 0, line),
cb,
)
}
unsafe fn do_resolve(
sym_from_addr: impl FnOnce(*mut SYMBOL_INFOW) -> BOOL,
get_line_from_addr: impl FnOnce(&mut IMAGEHLP_LINEW64) -> BOOL,
cb: &mut dyn FnMut(&super::Symbol),
) {
const SIZE: usize = 2 * MAX_SYM_NAME + mem::size_of::<SYMBOL_INFOW>();
let mut data = Aligned8([0u8; SIZE]);
let data = &mut data.0;
let info = &mut *(data.as_mut_ptr() as *mut SYMBOL_INFOW);
info.MaxNameLen = MAX_SYM_NAME as ULONG;
info.SizeOfStruct = 88;
if sym_from_addr(info) != TRUE {
return;
}
let name_len = ::core::cmp::min(info.NameLen as usize, info.MaxNameLen as usize - 1);
let name_ptr = info.Name.as_ptr() as *const u16;
let name = slice::from_raw_parts(name_ptr, name_len);
let mut name_len = 0;
let mut name_buffer = [0; 256];
{
let mut remaining = &mut name_buffer[..];
for c in char::decode_utf16(name.iter().cloned()) {
let c = c.unwrap_or(char::REPLACEMENT_CHARACTER);
let len = c.len_utf8();
if len < remaining.len() {
c.encode_utf8(remaining);
let tmp = remaining;
remaining = &mut tmp[len..];
name_len += len;
} else {
break;
}
}
}
let name = &name_buffer[..name_len] as *const [u8];
let mut line = mem::zeroed::<IMAGEHLP_LINEW64>();
line.SizeOfStruct = mem::size_of::<IMAGEHLP_LINEW64>() as DWORD;
let mut filename = None;
let mut lineno = None;
if get_line_from_addr(&mut line) == TRUE {
lineno = Some(line.LineNumber as u32);
let base = line.FileName;
let mut len = 0;
while *base.offset(len) != 0 {
len += 1;
}
let len = len as usize;
filename = Some(slice::from_raw_parts(base, len) as *const [u16]);
}
cb(&super::Symbol {
inner: Symbol {
name,
addr: info.Address as *mut _,
line: lineno,
filename,
_filename_cache: cache(filename),
_marker: marker::PhantomData,
},
})
}
#[cfg(feature = "std")]
unsafe fn cache(filename: Option<*const [u16]>) -> Option<::std::ffi::OsString> {
use std::os::windows::ffi::OsStringExt;
filename.map(|f| ::std::ffi::OsString::from_wide(&*f))
}
#[cfg(not(feature = "std"))]
unsafe fn cache(_filename: Option<*const [u16]>) {}