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|
use crate::format;
use crate::{log, os, trace::StateTracker};
use crate::{log::UInt, GlobalDelayedState};
use cuda_types::cuda::*;
use std::borrow::Cow;
use std::hash::Hash;
use std::{
collections::{hash_map, HashMap},
ffi::c_void,
mem,
os::raw::{c_int, c_uint, c_ulong, c_ushort},
ptr, slice,
};
pub(crate) struct DarkApiState {
// Key is Box<CUuuid, because thunk reporting unknown export table needs a
// stablememory location for the guid
overrides: HashMap<Box<CUuuidWrapper>, Vec<*const c_void>>,
original: OriginalExports,
}
#[derive(Eq, PartialEq)]
pub(crate) struct CUuuidWrapper(pub CUuuid);
impl Hash for CUuuidWrapper {
fn hash<H: std::hash::Hasher>(&self, state: &mut H) {
self.0.bytes.hash(state);
}
}
#[allow(improper_ctypes_definitions)]
pub(crate) struct OriginalExports {
original_get_module_from_cubin: Option<
unsafe extern "system" fn(
result: *mut CUmodule,
fatbinc_wrapper: *const FatbincWrapper,
) -> CUresult,
>,
original_get_module_from_cubin_ext1: Option<
unsafe extern "system" fn(
result: *mut CUmodule,
fatbinc_wrapper: *const FatbincWrapper,
ptr1: *mut c_void,
ptr2: *mut c_void,
_unknown: usize,
) -> CUresult,
>,
original_get_module_from_cubin_ext2: Option<
unsafe extern "system" fn(
fatbinc_wrapper: *const FatbinHeader,
result: *mut CUmodule,
ptr1: *mut c_void,
ptr2: *mut c_void,
_unknown: usize,
) -> CUresult,
>,
}
impl DarkApiState {
pub(crate) fn new() -> Self {
let original = OriginalExports {
original_get_module_from_cubin: None,
original_get_module_from_cubin_ext1: None,
original_get_module_from_cubin_ext2: None,
};
DarkApiState {
overrides: HashMap::new(),
original,
}
}
}
pub(crate) fn override_export_table(
pp_export_table: *mut *const c_void,
p_export_table_id: *const CUuuid,
state: &mut crate::trace::StateTracker,
) {
let state = &mut state.dark_api;
let export_table_mut = unsafe { &mut *pp_export_table };
let export_id = Box::new(CUuuidWrapper(unsafe { *p_export_table_id }));
*export_table_mut = match state.overrides.entry(export_id) {
hash_map::Entry::Occupied(entry) => entry.get().as_ptr() as *const _,
hash_map::Entry::Vacant(entry) => {
let guid_ptr = unsafe {
mem::transmute::<*const CUuuidWrapper, *const CUuuid>(&**entry.key() as *const _)
};
entry
.insert(unsafe {
create_new_override(*pp_export_table as *const _, guid_ptr, &mut state.original)
})
.as_ptr() as *const _
}
};
}
unsafe fn create_new_override(
export_table: *const *const c_void,
export_id: *const CUuuid,
state: &mut OriginalExports,
) -> Vec<*const c_void> {
let mut byte_length: usize = *(export_table as *const usize);
// Some export tables don't start with a byte count, but directly with a
// pointer, and are instead terminated by 0 or MAX
let export_functions_start_idx;
let mut override_table = Vec::new();
if byte_length > 0x10000 {
export_functions_start_idx = 0;
let mut i = 0;
loop {
let current_fn = export_table.add(i);
let current_fn_numeric = *current_fn as usize;
if current_fn_numeric == 0usize || current_fn_numeric == usize::MAX {
byte_length = (i + 1) * mem::size_of::<usize>();
break;
}
i += 1;
}
} else {
override_table.push(byte_length as *const _);
export_functions_start_idx = 1;
}
for i in export_functions_start_idx..(byte_length / mem::size_of::<usize>()) {
let current_fn = export_table.add(i);
override_table.push(get_export_override_fn(state, *current_fn, export_id, i));
}
override_table
}
unsafe extern "system" fn report_unknown_export_table_call(
export_table: *const CUuuid,
idx: usize,
) {
if let Ok(mut global_state) = crate::GLOBAL_STATE.lock() {
let mut logger = global_state
.log_factory
.get_logger_dark_api(*export_table, idx, None);
logger.log(log::LogEntry::UnknownExportTableFn)
}
}
const CUDART_INTERFACE_GUID: CUuuid = CUuuid {
bytes: [
0x6b, 0xd5, 0xfb, 0x6c, 0x5b, 0xf4, 0xe7, 0x4a, 0x89, 0x87, 0xd9, 0x39, 0x12, 0xfd, 0x9d,
0xf9,
],
};
const TOOLS_RUNTIME_CALLBACK_HOOKS_GUID: CUuuid = CUuuid {
bytes: [
0xa0, 0x94, 0x79, 0x8c, 0x2e, 0x74, 0x2e, 0x74, 0x93, 0xf2, 0x08, 0x00, 0x20, 0x0c, 0x0a,
0x66,
],
};
const CONTEXT_LOCAL_STORAGE_INTERFACE_V0301_GUID: CUuuid = CUuuid {
bytes: [
0xc6, 0x93, 0x33, 0x6e, 0x11, 0x21, 0xdf, 0x11, 0xa8, 0xc3, 0x68, 0xf3, 0x55, 0xd8, 0x95,
0x93,
],
};
const CTX_CREATE_BYPASS_GUID: CUuuid = CUuuid {
bytes: [
0x0C, 0xA5, 0x0B, 0x8C, 0x10, 0x04, 0x92, 0x9A, 0x89, 0xA7, 0xD0, 0xDF, 0x10, 0xE7, 0x72,
0x86,
],
};
const HEAP_ACCESS_GUID: CUuuid = CUuuid {
bytes: [
0x19, 0x5B, 0xCB, 0xF4, 0xD6, 0x7D, 0x02, 0x4A, 0xAC, 0xC5, 0x1D, 0x29, 0xCE, 0xA6, 0x31,
0xAE,
],
};
const DEVICE_EXTENDED_RT_GUID: CUuuid = CUuuid {
bytes: [
0xB1u8, 0x05, 0x41, 0xE1, 0xF7, 0xC7, 0xC7, 0x4A, 0x9F, 0x64, 0xF2, 0x23, 0xBE, 0x99, 0xF1,
0xE2,
],
};
unsafe fn get_export_override_fn(
state: &mut OriginalExports,
original_fn: *const c_void,
guid: *const CUuuid,
idx: usize,
) -> *const c_void {
match (*guid, idx) {
(TOOLS_RUNTIME_CALLBACK_HOOKS_GUID, 2)
| (TOOLS_RUNTIME_CALLBACK_HOOKS_GUID, 6)
| (CUDART_INTERFACE_GUID, 2)
| (CUDART_INTERFACE_GUID, 7)
| (CONTEXT_LOCAL_STORAGE_INTERFACE_V0301_GUID, 0)
| (CONTEXT_LOCAL_STORAGE_INTERFACE_V0301_GUID, 1)
| (CONTEXT_LOCAL_STORAGE_INTERFACE_V0301_GUID, 2)
| (CTX_CREATE_BYPASS_GUID, 1)
| (HEAP_ACCESS_GUID, 1)
| (HEAP_ACCESS_GUID, 2)
| (DEVICE_EXTENDED_RT_GUID, 5)
| (DEVICE_EXTENDED_RT_GUID, 13) => original_fn,
(CUDART_INTERFACE_GUID, 1) => {
state.original_get_module_from_cubin = mem::transmute(original_fn);
get_module_from_cubin as *const _
}
(CUDART_INTERFACE_GUID, 6) => {
state.original_get_module_from_cubin_ext1 = mem::transmute(original_fn);
get_module_from_cubin_ext1 as *const _
}
(CUDART_INTERFACE_GUID, 8) => {
state.original_get_module_from_cubin_ext2 = mem::transmute(original_fn);
get_module_from_cubin_ext2 as *const _
}
_ => {
// terminator if it's an export table that is not size-prefixed
if original_fn == ptr::null() || (original_fn as usize) == usize::MAX {
ptr::null()
} else {
os::get_thunk(original_fn, report_unknown_export_table_call, guid, idx)
}
}
}
}
const FATBINC_MAGIC: c_uint = 0x466243B1;
const FATBINC_VERSION_V1: c_uint = 0x1;
const FATBINC_VERSION_V2: c_uint = 0x2;
#[repr(C)]
struct FatbincWrapper {
magic: c_uint,
version: c_uint,
data: *const FatbinHeader,
filename_or_fatbins: *const c_void,
}
const FATBIN_MAGIC: c_uint = 0xBA55ED50;
const FATBIN_VERSION: c_ushort = 0x01;
#[repr(C, align(8))]
struct FatbinHeader {
magic: c_uint,
version: c_ushort,
header_size: c_ushort,
files_size: c_ulong, // excluding frame header, size of all blocks framed by this frame
}
const FATBIN_FILE_HEADER_KIND_PTX: c_ushort = 0x01;
const FATBIN_FILE_HEADER_KIND_ELF: c_ushort = 0x02;
const FATBIN_FILE_HEADER_VERSION_CURRENT: c_ushort = 0x101;
// assembly file header is a bit different, but we don't care
#[repr(C)]
#[derive(Debug)]
struct FatbinFileHeader {
kind: c_ushort,
version: c_ushort,
header_size: c_uint,
padded_payload_size: c_uint,
unknown0: c_uint, // check if it's written into separately
payload_size: c_uint,
unknown1: c_uint,
unknown2: c_uint,
sm_version: c_uint,
bit_width: c_uint,
unknown3: c_uint,
unknown4: c_ulong,
unknown5: c_ulong,
uncompressed_payload: c_ulong,
}
unsafe fn record_submodules_from_wrapped_fatbin(
module: *mut CUmodule,
fatbinc_wrapper: *const FatbincWrapper,
fn_logger: &mut log::FunctionLogger,
delayed_state: &mut GlobalDelayedState,
original_fn: impl FnOnce(&OriginalExports) -> CUresult,
) -> CUresult {
let result = original_fn(&delayed_state.cuda_state.dark_api.original);
fn_logger.result = Some(result);
let magic = (*fatbinc_wrapper).magic;
if magic != FATBINC_MAGIC {
fn_logger.log(log::LogEntry::UnexpectedBinaryField {
field_name: "FATBINC_MAGIC",
expected: vec![UInt::U32(FATBINC_MAGIC)],
observed: UInt::U32(magic),
});
}
if (*fatbinc_wrapper).version != FATBINC_VERSION_V1
&& (*fatbinc_wrapper).version != FATBINC_VERSION_V2
{
fn_logger.log(log::LogEntry::UnexpectedBinaryField {
field_name: "FATBINC_VERSION",
expected: vec![UInt::U32(FATBINC_VERSION_V1), UInt::U32(FATBINC_VERSION_V2)],
observed: UInt::U32(magic),
});
}
let is_version_2 = (*fatbinc_wrapper).version == FATBINC_VERSION_V2;
record_submodules_from_fatbin(
*module,
(*fatbinc_wrapper).data,
if is_version_2 { Some(1) } else { None },
fn_logger,
&mut delayed_state.cuda_state,
);
if is_version_2 {
let mut current = (*fatbinc_wrapper).filename_or_fatbins as *const *const c_void;
while *current != ptr::null() {
record_submodules_from_fatbin(
*module,
*current as *const _,
Some(2),
fn_logger,
&mut delayed_state.cuda_state,
);
current = current.add(1);
}
}
result
}
unsafe fn record_submodules_from_fatbin(
module: CUmodule,
fatbin_header: *const FatbinHeader,
fatbin_version: Option<usize>,
logger: &mut log::FunctionLogger,
state: &mut StateTracker,
) {
let magic = (*fatbin_header).magic;
if magic != FATBIN_MAGIC {
logger.log(log::LogEntry::UnexpectedBinaryField {
field_name: "FATBIN_MAGIC",
expected: vec![UInt::U32(FATBIN_MAGIC)],
observed: UInt::U32(magic),
});
return;
}
let version = (*fatbin_header).version;
if version != FATBIN_VERSION {
logger.log(log::LogEntry::UnexpectedBinaryField {
field_name: "FATBIN_VERSION",
expected: vec![UInt::U16(FATBIN_VERSION)],
observed: UInt::U16(version),
});
return;
}
let file = (fatbin_header as *const u8).add((*fatbin_header).header_size as usize);
let end = file.add((*fatbin_header).files_size as usize);
record_submodules(
fatbin_version == Some(2),
module,
fatbin_version,
logger,
state,
file,
end,
);
}
#[allow(improper_ctypes_definitions)]
unsafe extern "system" fn get_module_from_cubin(
module: *mut CUmodule,
fatbinc_wrapper: *const FatbincWrapper,
) -> CUresult {
let arguments_writer = Box::new(move |writer: &mut dyn std::io::Write| {
writer.write_all(b"(")?;
writer.write_all(stringify!(module).as_bytes())?;
writer.write_all(b": ")?;
format::CudaDisplay::write(&module, "", 0, writer)?;
writer.write_all(b", ")?;
writer.write_all(stringify!(fatbinc_wrapper).as_bytes())?;
write!(writer, ": {:p})", fatbinc_wrapper)
});
let global_state = &mut *super::GLOBAL_STATE.lock().unwrap();
let mut fn_logger = global_state.log_factory.get_logger_dark_api(
CUDART_INTERFACE_GUID,
1,
Some(arguments_writer),
);
let global_state = &mut *super::GLOBAL_STATE.lock().unwrap();
let delayed_state = global_state.delayed_state.unwrap_mut();
record_submodules_from_wrapped_fatbin(
module,
fatbinc_wrapper,
&mut fn_logger,
delayed_state,
|original_exports| {
original_exports.original_get_module_from_cubin.unwrap()(module, fatbinc_wrapper)
},
)
}
#[allow(improper_ctypes_definitions)]
unsafe extern "system" fn get_module_from_cubin_ext1(
module: *mut CUmodule,
fatbinc_wrapper: *const FatbincWrapper,
ptr1: *mut c_void,
ptr2: *mut c_void,
_unknown: usize,
) -> CUresult {
let arguments_writer = Box::new(move |writer: &mut dyn std::io::Write| {
writer.write_all(b"(")?;
writer.write_all(stringify!(module).as_bytes())?;
writer.write_all(b": ")?;
format::CudaDisplay::write(&module, "", 0, writer)?;
writer.write_all(b", ")?;
writer.write_all(stringify!(fatbinc_wrapper).as_bytes())?;
write!(writer, ": {:p}, ", fatbinc_wrapper)?;
writer.write_all(stringify!(ptr1).as_bytes())?;
write!(writer, ": {:p}, ", ptr1)?;
writer.write_all(stringify!(ptr2).as_bytes())?;
write!(writer, ": {:p}, ", ptr2)?;
writer.write_all(stringify!(_unknown).as_bytes())?;
write!(writer, ": {})", _unknown)
});
let global_state = &mut *super::GLOBAL_STATE.lock().unwrap();
let mut fn_logger = global_state.log_factory.get_logger_dark_api(
CUDART_INTERFACE_GUID,
6,
Some(arguments_writer),
);
if ptr1 != ptr::null_mut() {
fn_logger.log(log::LogEntry::UnexpectedArgument {
arg_name: stringify!(ptr1),
expected: vec![UInt::USize(0)],
observed: UInt::USize(ptr1 as usize),
});
}
if ptr2 != ptr::null_mut() {
fn_logger.log(log::LogEntry::UnexpectedArgument {
arg_name: stringify!(ptr2),
expected: vec![UInt::USize(0)],
observed: UInt::USize(ptr2 as usize),
});
}
if _unknown != 0 {
fn_logger.log(log::LogEntry::UnexpectedArgument {
arg_name: stringify!(_unknown),
expected: vec![UInt::USize(0)],
observed: UInt::USize(_unknown),
});
}
let delayed_state = global_state.delayed_state.unwrap_mut();
record_submodules_from_wrapped_fatbin(
module,
fatbinc_wrapper,
&mut fn_logger,
delayed_state,
|original_exports| {
original_exports
.original_get_module_from_cubin_ext1
.unwrap()(module, fatbinc_wrapper, ptr1, ptr2, _unknown)
},
)
}
#[allow(improper_ctypes_definitions)]
unsafe extern "system" fn get_module_from_cubin_ext2(
fatbin_header: *const FatbinHeader,
module: *mut CUmodule,
ptr1: *mut c_void,
ptr2: *mut c_void,
_unknown: usize,
) -> CUresult {
let arguments_writer = Box::new(move |writer: &mut dyn std::io::Write| {
writer.write_all(b"(")?;
writer.write_all(stringify!(fatbin_header).as_bytes())?;
write!(writer, ": {:p}, ", fatbin_header)?;
writer.write_all(stringify!(module).as_bytes())?;
writer.write_all(b": ")?;
format::CudaDisplay::write(&module, "", 0, writer)?;
writer.write_all(b", ")?;
writer.write_all(stringify!(ptr1).as_bytes())?;
write!(writer, ": {:p}, ", ptr1)?;
writer.write_all(stringify!(ptr2).as_bytes())?;
write!(writer, ": {:p}, ", ptr2)?;
writer.write_all(stringify!(_unknown).as_bytes())?;
write!(writer, ": {})", _unknown)
});
let global_state = &mut *super::GLOBAL_STATE.lock().unwrap();
let mut fn_logger = global_state.log_factory.get_logger_dark_api(
CUDART_INTERFACE_GUID,
8,
Some(arguments_writer),
);
if ptr1 != ptr::null_mut() {
fn_logger.log(log::LogEntry::UnexpectedArgument {
arg_name: stringify!(ptr1),
expected: vec![UInt::USize(0)],
observed: UInt::USize(ptr1 as usize),
});
}
if ptr2 != ptr::null_mut() {
fn_logger.log(log::LogEntry::UnexpectedArgument {
arg_name: stringify!(ptr2),
expected: vec![UInt::USize(0)],
observed: UInt::USize(ptr2 as usize),
});
}
if _unknown != 0 {
fn_logger.log(log::LogEntry::UnexpectedArgument {
arg_name: stringify!(_unknown),
expected: vec![UInt::USize(0)],
observed: UInt::USize(_unknown),
});
}
let delayed_state = global_state.delayed_state.unwrap_mut();
let result = delayed_state
.cuda_state
.dark_api
.original
.original_get_module_from_cubin_ext2
.unwrap()(fatbin_header, module, ptr1, ptr2, _unknown);
fn_logger.result = Some(result);
if result.is_err() {
return result;
}
record_submodules_from_fatbin(
*module,
fatbin_header,
None,
&mut fn_logger,
&mut delayed_state.cuda_state,
);
result
}
unsafe fn record_submodules(
should_decompress_elf: bool,
module: CUmodule,
version: Option<usize>,
fn_logger: &mut log::FunctionLogger,
state: &mut StateTracker,
start: *const u8,
end: *const u8,
) {
let mut index = start;
while index < end {
let fatbin_file = index as *const FatbinFileHeader;
let fatbin_file_version = (*fatbin_file).version;
if fatbin_file_version != FATBIN_FILE_HEADER_VERSION_CURRENT {
fn_logger.log(log::LogEntry::UnexpectedBinaryField {
field_name: stringify!(fatbin_file_version),
expected: vec![UInt::U16(FATBIN_FILE_HEADER_VERSION_CURRENT)],
observed: UInt::U16(fatbin_file_version),
});
}
let fatbin_file_kind = (*fatbin_file).kind;
if fatbin_file_kind == FATBIN_FILE_HEADER_KIND_PTX {
let decompressed = decompress_kernel_module(fatbin_file);
match decompressed {
Some(mut decompressed) => {
decompressed.pop(); // remove trailing zero
state.record_new_submodule(module, version, &*decompressed, fn_logger, "ptx")
}
None => fn_logger.log(log::LogEntry::Lz4DecompressionFailure),
}
} else if fatbin_file_kind == FATBIN_FILE_HEADER_KIND_ELF {
let source_buffer = if should_decompress_elf {
let decompressed = decompress_kernel_module(fatbin_file);
match decompressed {
Some(decompressed) => Cow::Owned(decompressed),
None => {
fn_logger.log(log::LogEntry::Lz4DecompressionFailure);
continue;
}
}
} else {
Cow::Borrowed(slice::from_raw_parts(
(fatbin_file as *const u8).add((*fatbin_file).header_size as usize),
(*fatbin_file).padded_payload_size as usize,
))
};
state.record_new_submodule(module, version, &*source_buffer, fn_logger, "elf")
} else {
fn_logger.log(log::LogEntry::UnexpectedBinaryField {
field_name: stringify!(fatbin_file_kind),
expected: vec![
UInt::U16(FATBIN_FILE_HEADER_KIND_PTX),
UInt::U16(FATBIN_FILE_HEADER_KIND_ELF),
],
observed: UInt::U16(fatbin_file_kind),
});
}
index = index
.add((*fatbin_file).header_size as usize + (*fatbin_file).padded_payload_size as usize);
}
}
const MAX_MODULE_DECOMPRESSION_BOUND: usize = 64 * 1024 * 1024;
unsafe fn decompress_kernel_module(file: *const FatbinFileHeader) -> Option<Vec<u8>> {
let decompressed_size = usize::max(1024, (*file).uncompressed_payload as usize);
let mut decompressed_vec = vec![0u8; decompressed_size];
loop {
match lz4_sys::LZ4_decompress_safe(
(file as *const u8).add((*file).header_size as usize) as *const _,
decompressed_vec.as_mut_ptr() as *mut _,
(*file).payload_size as c_int,
decompressed_vec.len() as c_int,
) {
error if error < 0 => {
let new_size = decompressed_vec.len() * 2;
if new_size > MAX_MODULE_DECOMPRESSION_BOUND {
return None;
}
decompressed_vec.resize(decompressed_vec.len() * 2, 0);
}
real_decompressed_size => {
decompressed_vec.truncate(real_decompressed_size as usize);
return Some(decompressed_vec);
}
}
}
}
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