jerryscript-project/jerryscript

Why it runs failed to run a javascript code

RingsC opened this issue · 5 comments

RingsC commented

I use the following compiling command to build the static libs, and use these libs in my project.
cmake .. -DCMAKE_BUILD_TYPE=Release -DJERRY_CMDLINE=OFF -DBUILD_SHARED_LIBS=OFF -DJERRY_ERROR_MESSAGES=ON -DCMAKE_INSTALL_PREFIX=/path/to/install
When i use jerry_parse and jerry_run or jerry_eval to compile the following part of javascript. but it failed. Can you tell me what's wrong with my code, and run the example code that it works well. I just replace the script with my own code, and re-run the example , it does not work.

var VAL = 5; function isEven(num) { return num % 2 == 0;} return isEven(VAL);

`
const jerry_char_t script[] = "var VAL = 5; function isEven(num) { return num % 2 == 0;} return isEven(VAL);";

/* Setup Global scope code */
jerry_value_t ret_val = jerry_eval (script, sizeof (script) - 1, JERRY_PARSE_NO_OPTS);

print_value(ret_val);
/* Returned value must be freed */
jerry_value_free (ret_val);
`

and it saw the ret_val that it 's an object type. BTW: i copy that code into an online javascript engine, and tests that code, it works.

RingsC commented

I suspect jerry_init() is missing, see here:

https://github.com/jerryscript-project/jerryscript/blob/master/tests/unit-core/test-abort.c#L38

At first, i think that i do the intialization in main thread, and run the script in another thread that leads to this error. But, i am wrong. After i do initialzation jerry_init (JERRY_INIT_EMPTY); in same place (same thread), it still gets an exception report.

It can pass the jerry_parse, but falled at jerry_run, which gets an exception.

RingsC commented

And, i will build a debug version of jerryscript, which can step into the source code, to find out the reason.

zherczeg commented

Is there anything else which run? I think return cannot be used in global code, only in a function.

RingsC commented

Is there anything else which run? I think return cannot be used in global code, only in a function.

Yes, you're right, return can not be used in global code. It works without that return, and Thanks again for your help.