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use crate::plugin::ffi::{BNWARPFunction, BNWARPTarget, BNWARPType};
use binaryninja::data_buffer::DataBuffer;
use binaryninjacore_sys::BNDataBuffer;
use std::ffi::c_char;
use std::mem::ManuallyDrop;
use std::sync::Arc;
use warp::chunk::ChunkKind;
use warp::{WarpFile, WarpFileHeader};
/// A [`WarpFile`] wrapper that uses reference counting to manage its chunks lifetime.
///
/// Used primarily when passing to the C FFI so that chunks do not need to have a complicated lifetime.
pub struct RcWarpFile {
pub header: WarpFileHeader,
pub chunks: Vec<Arc<warp::chunk::Chunk<'static>>>,
}
impl From<WarpFile<'static>> for RcWarpFile {
fn from(file: WarpFile<'static>) -> Self {
let chunks = file.chunks.into_iter().map(|c| Arc::new(c)).collect();
Self {
header: file.header,
chunks,
}
}
}
impl From<&RcWarpFile> for WarpFile<'static> {
fn from(rc_file: &RcWarpFile) -> Self {
let chunks = rc_file.chunks.iter().map(|c| (**c).clone()).collect();
Self {
header: rc_file.header.clone(),
chunks,
}
}
}
pub type BNWARPFile = RcWarpFile;
pub type BNWARPChunk = warp::chunk::Chunk<'static>;
// TODO: From bytes as well.
#[no_mangle]
pub unsafe extern "C" fn BNWARPNewFileFromPath(path: *mut c_char) -> *mut BNWARPFile {
let path_cstr = unsafe { std::ffi::CStr::from_ptr(path) };
let Ok(path) = path_cstr.to_str() else {
return std::ptr::null_mut();
};
let Ok(bytes) = std::fs::read(path) else {
return std::ptr::null_mut();
};
let Some(file) = WarpFile::from_owned_bytes(bytes) else {
return std::ptr::null_mut();
};
let rc_file = RcWarpFile::from(file);
Arc::into_raw(Arc::new(rc_file)) as *mut BNWARPFile
}
#[no_mangle]
pub unsafe extern "C" fn BNWARPFileGetChunks(
file: *mut BNWARPFile,
count: *mut usize,
) -> *mut *mut BNWARPChunk {
let arc_file = ManuallyDrop::new(Arc::from_raw(file));
*count = arc_file.chunks.len();
let boxed_chunks: Box<[_]> = arc_file
.chunks
.iter()
.map(|c| Arc::into_raw(c.clone()))
.collect();
Box::into_raw(boxed_chunks) as *mut *mut BNWARPChunk
}
#[no_mangle]
pub unsafe extern "C" fn BNWARPFileToDataBuffer(file: *mut BNWARPFile) -> *mut BNDataBuffer {
let arc_file = ManuallyDrop::new(Arc::from_raw(file));
let warp_file = WarpFile::from(arc_file.as_ref());
let buffer = DataBuffer::new(&warp_file.to_bytes());
buffer.into_raw()
}
#[no_mangle]
pub unsafe extern "C" fn BNWARPChunkGetTarget(chunk: *const BNWARPChunk) -> *mut BNWARPTarget {
let chunk = unsafe { &*chunk };
let chunk_target = chunk.header.target.clone();
Arc::into_raw(Arc::new(chunk_target)) as *mut BNWARPTarget
}
#[no_mangle]
pub unsafe extern "C" fn BNWARPChunkGetFunctions(
chunk: *const BNWARPChunk,
count: *mut usize,
) -> *mut *mut BNWARPFunction {
let chunk = unsafe { &*chunk };
match &chunk.kind {
ChunkKind::Signature(sc) => {
let boxed_funcs: Box<[_]> = sc
.functions()
.into_iter()
.map(|f| Arc::into_raw(Arc::new(f.clone())))
.collect();
*count = boxed_funcs.len();
Box::into_raw(boxed_funcs) as *mut *mut BNWARPFunction
}
ChunkKind::Type(_) => std::ptr::null_mut(),
}
}
#[no_mangle]
pub unsafe extern "C" fn BNWARPChunkGetTypes(
chunk: *const BNWARPChunk,
count: *mut usize,
) -> *mut *mut BNWARPType {
let chunk = unsafe { &*chunk };
match &chunk.kind {
ChunkKind::Signature(_) => std::ptr::null_mut(),
ChunkKind::Type(tc) => {
let boxed_types: Box<[_]> = tc
.types()
.into_iter()
.map(|t| Arc::into_raw(Arc::new(t.ty.clone())))
.collect();
*count = boxed_types.len();
Box::into_raw(boxed_types) as *mut *mut BNWARPType
}
}
}
#[no_mangle]
pub unsafe extern "C" fn BNWARPNewFileReference(file: *mut BNWARPFile) -> *mut BNWARPFile {
Arc::increment_strong_count(file);
file
}
#[no_mangle]
pub unsafe extern "C" fn BNWARPFreeFileReference(file: *mut BNWARPFile) {
if file.is_null() {
return;
}
Arc::decrement_strong_count(file);
}
#[no_mangle]
pub unsafe extern "C" fn BNWARPNewChunkReference(chunk: *mut BNWARPChunk) -> *mut BNWARPChunk {
Arc::increment_strong_count(chunk);
chunk
}
#[no_mangle]
pub unsafe extern "C" fn BNWARPFreeChunkReference(chunk: *mut BNWARPChunk) {
if chunk.is_null() {
return;
}
Arc::decrement_strong_count(chunk);
}
#[no_mangle]
pub unsafe extern "C" fn BNWARPFreeChunkList(chunks: *mut *mut BNWARPChunk, count: usize) {
let chunks_ptr = std::ptr::slice_from_raw_parts_mut(chunks, count);
let chunks = unsafe { Box::from_raw(chunks_ptr) };
for chunk in chunks {
// NOTE: The chunks themselves should also be arc.
BNWARPFreeChunkReference(chunk);
}
}
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