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use super::*;
impl MinidumpWriter {
/// Writes the [`MDStreamType::ThreadNamesStream`] which is an array of
/// [`miniduimp_common::format::MINIDUMP_THREAD`]
pub(crate) fn write_thread_names(
&mut self,
buffer: &mut DumpBuf,
dumper: &TaskDumper,
) -> Result<MDRawDirectory, WriterError> {
let threads = self.threads(dumper);
let list_header = MemoryWriter::<u32>::alloc_with_val(buffer, threads.len() as u32)?;
let mut dirent = MDRawDirectory {
stream_type: MDStreamType::ThreadNamesStream as u32,
location: list_header.location(),
};
let mut names = MemoryArrayWriter::<MDRawThreadName>::alloc_array(buffer, threads.len())?;
dirent.location.data_size += names.location().data_size;
for (i, tid) in threads.enumerate() {
// It's unfortunate if we can't grab a thread name, but it's also
// not a critical failure
let name_loc = match Self::write_thread_name(buffer, dumper, tid) {
Ok(loc) => loc,
Err(err) => {
log::warn!("failed to write thread name for thread {tid}: {err}");
write_string_to_location(buffer, "")?
}
};
let thread = MDRawThreadName {
thread_id: tid,
thread_name_rva: name_loc.rva.into(),
};
names.set_value_at(buffer, thread, i)?;
}
Ok(dirent)
}
/// Attempts to retrieve and write the threadname, returning the threa names
/// location if successful
fn write_thread_name(
buffer: &mut Buffer,
dumper: &TaskDumper,
tid: u32,
) -> Result<MDLocationDescriptor, WriterError> {
// As noted in usr/include/mach/thread_info.h, the THREAD_EXTENDED_INFO
// return is exactly the same as proc_pidinfo(..., proc_threadinfo)
impl mach::ThreadInfo for libc::proc_threadinfo {
const FLAVOR: u32 = 5; // THREAD_EXTENDED_INFO
}
let thread_info: libc::proc_threadinfo = dumper.thread_info(tid)?;
let name = std::str::from_utf8(
// SAFETY: This is an initialized block of static size
unsafe {
std::slice::from_raw_parts(
thread_info.pth_name.as_ptr().cast(),
thread_info.pth_name.len(),
)
},
)
.unwrap_or_default();
// Ignore the null terminator
let tname = match name.find('\0') {
Some(i) => &name[..i],
None => name,
};
Ok(write_string_to_location(buffer, tname)?)
}
}