Stream: git-wasmtime

Topic: wasmtime / Issue #2521 C-API: wasmtime_error_t type does ...

Wasmtime GitHub notifications bot (Dec 17 2020 at 19:31):

Dakror opened Issue #2521:

Using release v0.21.0 on x64 Linux, i can't use the error-related functionality since the wasmtime_error_t struct does not seem to be present in the C API.

Wasmtime GitHub notifications bot (Dec 17 2020 at 19:31):

Dakror labeled Issue #2521:

Using release v0.21.0 on x64 Linux, i can't use the error-related functionality since the wasmtime_error_t struct does not seem to be present in the C API.

Wasmtime GitHub notifications bot (Dec 17 2020 at 19:35):

bjorn3 commented on Issue #2521:

Are you using wasm.h instead of wasmtime.h? wasmtime_error_t is defined in wasmtime.h: https://github.com/bytecodealliance/wasmtime/blob/0b6b3d0b7a3740c96df382c746060b4eed8068fc/crates/c-api/include/wasmtime.h#L43

Wasmtime GitHub notifications bot (Dec 17 2020 at 19:39):

Dakror commented on Issue #2521:

No i am not. Exploring the Macro definition you can see its defined in terms of itself, which can't be right:

Wasmtime GitHub notifications bot (Dec 17 2020 at 19:40):

Dakror edited a comment on Issue #2521:

No i am not. Exploring the Macro definition you can see its defined in terms of itself without any contents, which can't be right:

Wasmtime GitHub notifications bot (Dec 17 2020 at 19:52):

bjorn3 commented on Issue #2521:

typedef struct wasmtime_error_t wasmtime_error_t means that the type wasmtime_error_t is defined as the partial type struct wasmtime_error_t. A partial type is a type whose actual content is not yet defined. This is often used as forward reference, but in this case it is used as opaque type to not give the C code direct access to it's contents.

Wasmtime GitHub notifications bot (Dec 17 2020 at 19:53):

bjorn3 edited a comment on Issue #2521:

typedef struct wasmtime_error_t wasmtime_error_t means that the type wasmtime_error_t is defined as the partial type struct wasmtime_error_t. A partial type is a type whose actual content is not yet defined. This is often used as forward reference, but in this case it is used as opaque type to not give the C code direct access to it's contents. Typedefing something to a struct with the same name is often used to avoid explicitly having to write out the struct prefix.

Wasmtime GitHub notifications bot (Dec 17 2020 at 19:54):

Dakror commented on Issue #2521:

I see, thanks for the explanation. But the issue still remains that the information for the type is missing at link time.

Wasmtime GitHub notifications bot (Dec 17 2020 at 19:57):

bjorn3 commented on Issue #2521:

Types don't exist at link time, only functions and global variables. What is the link error?

Wasmtime GitHub notifications bot (Dec 17 2020 at 20:02):

Dakror commented on Issue #2521:

I have seem to have misunderstood that part of the api and thought the wasmtime_error_message method was usable to just retrieve the last error during compilation which its not. I got things working now using the method properly. Thanks for your support

Wasmtime GitHub notifications bot (Dec 17 2020 at 20:02):

Dakror closed Issue #2521:

Using release v0.21.0 on x64 Linux, i can't use the error-related functionality since the wasmtime_error_t struct does not seem to be present in the C API.

Last updated: Oct 23 2024 at 20:03 UTC