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  • run example
    • Takes .wasm path and function name , list of parameters and length of expected return values
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import WasmEdge
import os

# WasmEdge/bindings/python/example.py
wasm_base_path = os.path.abspath(os.path.join(__file__, "../../.."))
fib_wasm = os.path.join(
    wasm_base_path, "tools/wasmedge/examples/fibonacci.wasm"
)
log = WasmEdge.Logging()
log.debug()
vm = WasmEdge.VM()
res, l = vm.run(fib_wasm, 'fib', [10], 1)
print(l)

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#include <wasmedge.h>
#include <stdio.h>

int main() {
    /* Create the configure context and add the WASI support. */
    /* This step is not necessary unless you need WASI support. */
    WasmEdge_ConfigureContext *ConfCxt = WasmEdge_ConfigureCreate();
    WasmEdge_ConfigureAddHostRegistration(ConfCxt, WasmEdge_HostRegistration_Wasi);
    /* The configure and store context to the VM creation can be NULL. */
    WasmEdge_VMContext *VMCxt = WasmEdge_VMCreate(ConfCxt, NULL);

    /* The parameters and returns arrays. */
    WasmEdge_Value Params[1] = { WasmEdge_ValueGenI32(5) };
    WasmEdge_Value Returns[1];
    /* Function name. */
    WasmEdge_String FuncName = WasmEdge_StringCreateByCString("fib");
    /* Run the WASM function from file. */
    WasmEdge_Result Res = WasmEdge_VMRunWasmFromFile(VMCxt, "fibonacci.wasm", FuncName, Params, 1, Returns, 1);
    /* 
    * Developers can run the WASM binary from buffer with the `WasmEdge_VMRunWasmFromBuffer()` API,
    * or from `WasmEdge_ASTModuleContext` object with the `WasmEdge_VMRunWasmFromASTModule()` API.
    */

    if (WasmEdge_ResultOK(Res)) {
        printf("Get the result: %d\n", WasmEdge_ValueGetI32(Returns[0]));
    } else {
        printf("Error message: %s\n", WasmEdge_ResultGetMessage(Res));
    }

    /* Resources deallocations. */
    WasmEdge_VMDelete(VMCxt);
    WasmEdge_ConfigureDelete(ConfCxt);
    WasmEdge_StringDelete(FuncName);
    return 0;
}

[2021-10-14 02:42:27.458] [debug]  Execution succeeded.
[2021-10-14 02:42:27.458] [debug] 
====================  Statistics  ====================
Total execution time: 53764 ns
Wasm instructions execution time: 53764 ns
Host functions execution time: 0 ns
Executed wasm instructions count: 1854
Gas costs: 1854
Instructions per second: 34484041
['89']