wasmtime / issue #7401 There is a bug in "invoke_func" fu... · git-wasmtime

Stream: git-wasmtime

Topic: wasmtime / issue #7401 There is a bug in "invoke_func" fu...

Wasmtime GitHub notifications bot (Oct 30 2023 at 02:51):

liutao-liu added the bug label to Issue #7401.

Wasmtime GitHub notifications bot (Oct 30 2023 at 02:51):

liutao-liu opened issue #7401:

### Test Case
Na

Steps to Reproduce

When I input "target/debug/wasmtime run my.wasm --invoke my_func_name 1.1" in the command line, i got an error "invalid digit found in string".

Expected Results

The entered parameter "1.1" can be parsed successfully.

Actual Results

Got an error："invalid digit found in string"。

Versions and Environment

Wasmtime version or commit: wasmtime-cli 13.0.0

Operating system: Ubuntu 20.04

Architecture: Na

Extra Info

【Root Cause】
https://github.com/bytecodealliance/wasmtime/blob/519808fc5c2565f11f9b6a7f5fe3d2385f9f95e8/src/commands/run.rs#L507

The function invoke_func attempted to cast a floating-point string to F32/F64,which is actually a u32/u64 type.

【Solution】
I think this conversion should be written like this：
 let val: f32 = val.parse()?;
 let ptr = &val as *const f32 as *const u32;
 let val = unsafe { *ptr };

~~~

Wasmtime GitHub notifications bot (Oct 30 2023 at 07:22):

bjorn3 commented on issue #7401:

You can use .to_bits() on f32 to avoid unsafe code.

Wasmtime GitHub notifications bot (Oct 30 2023 at 13:22):

liutao-liu edited issue #7401:

### Test Case
Na

Steps to Reproduce

When I input "target/debug/wasmtime run my.wasm --invoke my_func_name 1.1" in the command line, i got an error "invalid digit found in string".

Expected Results

The entered parameter "1.1" can be parsed successfully.

Actual Results

Got an error："invalid digit found in string"。

Versions and Environment

Wasmtime version or commit: wasmtime-cli 13.0.0

Operating system: Ubuntu 20.04

Architecture: Na

Extra Info

【Root Cause】
https://github.com/bytecodealliance/wasmtime/blob/519808fc5c2565f11f9b6a7f5fe3d2385f9f95e8/src/commands/run.rs#L507

The function invoke_func attempted to cast a floating-point string to F32/F64,which is actually a u32/u64 type.

【Solution】
I think this conversion should be written like this：
let val: f32 = val.parse()?;
let val = val.to_bits();

~~~

Wasmtime GitHub notifications bot (Oct 30 2023 at 13:23):

liutao-liu commented on issue #7401:

You can use .to_bits() on f32 to avoid unsafe code.

You're right, I've revised it as you suggested.

Wasmtime GitHub notifications bot (Oct 30 2023 at 13:42):

alexcrichton commented on issue #7401:

Can you share the WebAssembly module that is being run? If the argument is of type i32 in wasm then it doesn't accept a floating point number as an argument (e.g. it won't call to_bits()).

Wasmtime GitHub notifications bot (Oct 31 2023 at 07:01):

liutao-liu commented on issue #7401:

Can you share the WebAssembly module that is being run? If the argument is of type i32 in wasm then it doesn't accept a floating point number as an argument (e.g. it won't call to_bits()).

(module (type $f_t (func (param f32) (result f32))) (func $f_f (type $f_t) (param $a f32) (result f32) local.get $a) (export "ret_f32" (func $f_f)))

Wasmtime GitHub notifications bot (Oct 31 2023 at 15:21):

alexcrichton commented on issue #7401:

Can you paste the full wasm module? Or upload it? The input you have provided does not have a function export called my_func_name which you're trying to invoke from the command line

Wasmtime GitHub notifications bot (Nov 01 2023 at 01:12):

liutao-liu edited a comment on issue #7401:

Can you share the WebAssembly module that is being run? If the argument is of type i32 in wasm then it doesn't accept a floating point number as an argument (e.g. it won't call to_bits()).

(module (type $f_t (func (param f32) (result f32))) (func $f_f (type $f_t) (param $a f32) (result f32) local.get $a) (export "my_func_name" (func $f_f)))

Wasmtime GitHub notifications bot (Nov 01 2023 at 01:17):

liutao-liu commented on issue #7401:

Can you paste the full wasm module? Or upload it? The input you have provided does not have a function export called my_func_name which you're trying to invoke from the command line

(module (type $f_t (func (param f32) (result f32))) (func $f_f (type $f_t) (param $a f32) (result f32) local.get $a) (export "my_func_name" (func $f_f)))

Wasmtime GitHub notifications bot (Nov 01 2023 at 01:58):

liutao-liu edited a comment on issue #7401:

Can you paste the full wasm module? Or upload it? The input you have provided does not have a function export called my_func_name which you're trying to invoke from the command line

(module (type $f_t (func (param f32) (result f32))) (func $f_f (type $f_t) (param $a f32) (result f32) local.get $a) (export "my_func_name" (func $f_f)))

target/debug/wasmtime run my.wasm --invoke my_func_name 1.1

Wasmtime GitHub notifications bot (Nov 01 2023 at 02:00):

liutao-liu edited a comment on issue #7401:

Can you paste the full wasm module? Or upload it? The input you have provided does not have a function export called my_func_name which you're trying to invoke from the command line
wat:
(module (type $f_t (func (param f32) (result f32))) (func $f_f (type $f_t) (param $a f32) (result f32) local.get $a) (export "my_func_name" (func $f_f)))

invoke command:
target/debug/wasmtime run my.wasm --invoke my_func_name 1.1

Wasmtime GitHub notifications bot (Nov 01 2023 at 02:00):

liutao-liu edited a comment on issue #7401:

Can you paste the full wasm module? Or upload it? The input you have provided does not have a function export called my_func_name which you're trying to invoke from the command line

wat:
(module (type $f_t (func (param f32) (result f32))) (func $f_f (type $f_t) (param $a f32) (result f32) local.get $a) (export "my_func_name" (func $f_f)))

invoke command:
target/debug/wasmtime run my.wasm --invoke my_func_name 1.1

Wasmtime GitHub notifications bot (Nov 01 2023 at 02:01):

liutao-liu edited a comment on issue #7401:

Can you paste the full wasm module? Or upload it? The input you have provided does not have a function export called my_func_name which you're trying to invoke from the command line

my.wat:
(module (type $f_t (func (param f32) (result f32))) (func $f_f (type $f_t) (param $a f32) (result f32) local.get $a) (export "my_func_name" (func $f_f)))

invoke command:
target/debug/wasmtime run my.wat --invoke my_func_name 1.1

Wasmtime GitHub notifications bot (Nov 01 2023 at 02:05):

liutao-liu edited a comment on issue #7401:

Can you paste the full wasm module? Or upload it? The input you have provided does not have a function export called my_func_name which you're trying to invoke from the command line

my.wat:
(module
  (type $f_t (func (param f32) (result f32)))
  (func $f_f (type $f_t) (param $a f32) (result f32)
      local.get $a)
(export "my_func_name" (func $f_f)))
invoke command:
target/debug/wasmtime run my.wat --invoke my_func_name 1.1

Wasmtime GitHub notifications bot (Nov 01 2023 at 15:05):

alexcrichton commented on issue #7401:

Thanks for the clarification, this should be fixed in https://github.com/bytecodealliance/wasmtime/pull/7440

Wasmtime GitHub notifications bot (Nov 01 2023 at 17:32):

pchickey closed issue #7401:

### Test Case
Na

Steps to Reproduce

When I input "target/debug/wasmtime run my.wasm --invoke my_func_name 1.1" in the command line, i got an error "invalid digit found in string".

Expected Results

The entered parameter "1.1" can be parsed successfully.

Actual Results

Got an error："invalid digit found in string"。

Versions and Environment

Wasmtime version or commit: wasmtime-cli 13.0.0

Operating system: Ubuntu 20.04

Architecture: Na

Extra Info

【Root Cause】
https://github.com/bytecodealliance/wasmtime/blob/519808fc5c2565f11f9b6a7f5fe3d2385f9f95e8/src/commands/run.rs#L507

The function invoke_func attempted to cast a floating-point string to F32/F64,which is actually a u32/u64 type.

【Solution】
I think this conversion should be written like this：
let val: f32 = val.parse()?;
let val = val.to_bits();

~~~

Last updated: Dec 23 2024 at 12:05 UTC