ya0guang opened a new issue #8534:
URL: https://github.com/apache/tvm/issues/8534
As some people and I mentioned in #6816, the currently TVM cannot support
`wasm32` target well using Rust APIs. It can run into this error: `wasm trap:
indirect call type mismatch`.
This error originates in the incorrect extern function definition in
`rust/tvm-sys/src/lib.rs`:
```rs
pub type BackendPackedCFunc = extern "C" fn(
args: *const TVMValue,
type_codes: *const c_int,
num_args: c_int,
out_ret_value: *mut TVMValue,
out_ret_tcode: *mut u32,
) -> c_int;
```
However, the correct definition in C is from
`include/tvm/runtime/c_backend_api.h`:
```c
/*!
* \brief Signature for backend functions exported as DLL.
*
* \param args The arguments
* \param type_codes The type codes of the arguments
* \param num_args Number of arguments.
* \param out_ret_value The output value of the the return value.
* \param out_ret_tcode The output type code of the return value.
* \param resource_handle Pointer to associated resource.
*
* \return 0 if success, -1 if failure happens, set error via
TVMAPISetLastError.
*/
typedef int (*TVMBackendPackedCFunc)(TVMValue* args, int* type_codes, int
num_args,
TVMValue* out_ret_value, int*
out_ret_tcode,
void* resource_handle);
```
Here is an additional parameter, `void* resource_handle`. It seems people
forgot to update the Rust interface. My previous issue(#8439) is also related
to this error.
@mssun and @m4sterchain are also interested in this issue.
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