nodejs WebAssembly native work is well，but webassemblyjs throw these error

[lljxx1]

{ instantiate: [Function: instantiate],
  compile: [Function: compile],
  validate: [Function: validate],
  instantiateFromSource: [Function: instantiateFromSource],
  Instance: [Function: Instance],
  Module: [Function: Module],
  Memory: [Function: Memory],
  Table: [Function: Table],
  RuntimeError: [Function: RuntimeError],
  LinkError: [Function: LinkError],
  CompileError: [Function: CompileError] }
(node:15096) UnhandledPromiseRejectionWarning: Unhandled promise rejection (reje
ction id: 2): Error: Validation errors:
Function does not have local 8 at func_17:8.
Function does not have local 12 at func_18:10.
Function does not have local 5 at func_19:11.
Function does not have local 3 at func_20:6.
Function does not have local 5 at func_21:7.
Function does not have local 7 at func_22:6.
Function does not have local 5 at func_23:5.
Function does not have local 6 at func_24:5.
Function does not have local 6 at func_24:0.
Function does not have local 6 at func_24:2.
Function does not have local 6 at func_24:2.
Function does not have local 10 at func_25:8.
Function does not have local 8 at func_26:8.
Function does not have local 7 at func_27:8.
Function does not have local 8 at func_28:8.
Function does not have local 9 at func_29:7.
Function does not have local 6 at func_30:4.
Function does not have local 5 at func_30:4.
Function does not have local 13 at func_32:2.
Function does not have local 10 at func_32:2.
Function does not have local 4 at func_32:4.
Function does not have local 8 at func_32:19.
Function does not have local 7 at func_33:6.
Function does not have local 7 at func_33:2.
Function does not have local 7 at func_33:5.
Function does not have local 2 at func_34:5.
Function does not have local 3 at func_34:5.
Function does not have local 2 at func_35:4.
Function does not have local 5 at func_38:2.
Function does not have local 5 at func_38:0.
Function does not have local 3 at func_38:3.
Function does not have local 4 at func_38:9.
Function does not have local 3 at func_40:7.
Function does not have local 5 at func_41:2.

[lljxx1]

i want test a wasm moudle and pass a i64 param to a function

[xtuc]

Could you please send me the Wasm module, if you can?

[...] pass a i64 param to a function

This is not possible yet, there's ongoing work to support that in JS. But you can pass two i32 instead.

[lljxx1]

http://votetracker.eosmedi.com/code.wast

this wasm module is a smart contract running on eos platform https://github.com/eosio/eos

my goal is execute this module in javascript，but the 'apply' function only accept the 3 i64 parameters ， but i found a article write by you，use bigint as i64 type， also i found this project ，i saw you used long.js， so i think maybe i can pass 3 'long' type values as the function input

[xtuc]

Thanks, I'll investigate that during the holidays.

The article I wrote is about the native support which is not yet deployed widely. I know that we have a hack to pass i64 as Long.js objects, i'll send an example here.

[xtuc]

With https://github.com/xtuc/webassemblyjs/pull/473 merged I'm down to two errors:

Validation errors:
Expected type i64 but got i32 at func_21:123.
Stack contains additional type i32 at func_35.

[lljxx1]

thanks a lot, merry christmas! I notice you will come to HanZhou for D2 in next month, maybe I will come too! welcome to china !

[xtuc]

Thanks, you too and see in at D2 :smiley:

[xtuc]

Now with #474 the module validates. I'm hitting an unimplemented operation now (i64.gt_u), would you mind contributing? I think it will trigger other unimplemented instructions.

For the i64 instructions case, we have Long.js that implements many operations already.

Also, to pass an i64 from JavaScript you can use:

const { readFileSync } = require("fs");
const WebAssemblyjs = require("./packages/webassemblyjs");
const Long = require("@xtuc/long").default;

const makeLogFn = msg => () => console.log(msg);

const _internalInstanceOptions = {
  checkForI64InSignature: false
};

const imports = {
  _internalInstanceOptions,

  env: {
    abort: makeLogFn("abort"),
    action_data_size: makeLogFn("action_data_size"),
    current_time: makeLogFn("current_time"),
    db_get_i64: makeLogFn("db_get_i64"),
    db_lowerbound_i64: makeLogFn("db_lowerbound_i64"),
    eosio_assert: makeLogFn("eosio_assert"),
    is_account: makeLogFn("is_account"),
    memcpy: makeLogFn("memcpy"),
    read_action_data: makeLogFn("read_action_data"),
    require_auth: makeLogFn("require_auth"),
    require_auth2: makeLogFn("require_auth2"),
    send_inline: makeLogFn("send_inline")
  }
};

const i64 = n => new Long.fromString(n);

WebAssemblyjs.instantiate(readFileSync("./code.wasm", null), imports)
  .then(i => {
    const { apply } = i.instance.exports;

    apply(i64("1"), i64("2"), i64("3"));
  })
  .catch(err => {
    throw err;
  });

[lljxx1]

wow, it's really helpful for me. this file is compiled by https://github.com/EOSIO/eosio.cdt

[lljxx1]

webassembly in blockchain project are very popular.

[lljxx1]

https://github.com/EOSIO/eos/blob/master/libraries/chain/webassembly/wavm.cpp

[lljxx1]

https://github.com/EOSIO/eosio.cdt/blob/10dc7187d754ce8348f6f57c21560067456a787c/external/wabt/src/wast-lexer.cc https://github.com/EOSIO/eos/blob/905e7c85714aee4286fa180ce946f15ceb4ce73c/libraries/wasm-jit/Source/Runtime/LLVMEmitIR.cpp https://github.com/search?p=1&q=org%3AEOSIO+gt_u&type=Code

these file maybe helpful

[lljxx1]

RETURN_OPCODE(Compare, I64GtU);

[xtuc]

I have an ongoing patch for the i64 operations https://github.com/xtuc/webassemblyjs/pull/475/files.

I encounter another error in the interpreter:

trace exec Instr(get_local)
trace exec Instr(extend_u/i32)
trace exec Instr(const)
trace exec Instr(shl)

Error: Internal failure: expected c1 value of type i64 on top of the stack, given type: i32

[lljxx1]

https://github.com/EOSIO/eosio.cdt/blob/10dc7187d754ce8348f6f57c21560067456a787c/external/wabt/src/interp.cc

[lljxx1]

https://github.com/WebAssembly/wabt/search?p=2&q=shl&unscoped_q=shl

[lljxx1]

thanks for your job！