Stream: git-wasmtime

Topic: wasmtime / Issue #2196 Looking up an exported function by...

Wasmtime GitHub notifications bot (Sep 11 2020 at 17:50):

jovanivanovic opened Issue #2196:

Hello, I've been going through the C Hello World embed and I've seen that in order to get an exported function from wasm, you get it by an index:

wasm_extern_vec_t externs;
wasm_instance_exports(instance, &externs);
assert(externs.size == 1);
wasm_func_t *run = wasm_extern_as_func(externs.data[0]);

Is there a possibility that I can lookup the function using it's name, run for example?

Wasmtime GitHub notifications bot (Sep 11 2020 at 18:13):

alexcrichton commented on Issue #2196:

Currently this can't be directly done with one function, but you can match up the list returned by wasm_module_exports with the list returned by wasm_instance_exports to get the name of each item.

Wasmtime GitHub notifications bot (Sep 11 2020 at 18:17):

jovanivanovic commented on Issue #2196:

@alexcrichton Thanks for the answer. Would it be possible for you to write an example on the matter please?

Wasmtime GitHub notifications bot (Sep 16 2020 at 14:02):

jovanivanovic closed Issue #2196:

Hello, I've been going through the C Hello World embed and I've seen that in order to get an exported function from wasm, you get it by an index:

wasm_extern_vec_t externs;
wasm_instance_exports(instance, &externs);
assert(externs.size == 1);
wasm_func_t *run = wasm_extern_as_func(externs.data[0]);

Is there a possibility that I can lookup the function using it's name, run for example?

Last updated: Dec 06 2025 at 06:05 UTC