Thank your Derek, that's really helpful.
On Tuesday, November 12, 2019 at 10:52:58 PM UTC+8, Derek Parker wrote:
>
> If you look at the output of your first command you see the result
> `(**runtime.g)(<addr>)`, however you're trying to cast to
> `(runtime.g*)(<addr>)`. The correct syntax you're looking for is
> ` *(*runtime.g)(<addr>)`. Hope that helps!
>
> On Monday, November 11, 2019 at 11:29:42 PM UTC-8, Xiangdong JI wrote:
>>
>> Hi Derek,
>>
>> Say I have the pointer value of a specific G struct, how to convert it to
>> 'struct g' (or any other form) in delve so that I can check
>> the details of its fields?
>>
>> For example (simply utilized runtime.m0.curg to get a pointer value here)
>>
>> (dlv) p &runtime.m0.curg
>> (**runtime.g)(0x56a140)
>>
>> Just tried a few commands to convert the value back to 'struct g' or a
>> pointer to 'struct g'
>>
>> (dlv) p (runtime.g*)(0x56b140)
>> Command failed: 1:12: expected operand, found ')'
>> (dlv) p ('runtime.g'*)(0x56b140)
>> Command failed: 1:2: illegal rune literal
>> (dlv) p ("runtime.g"*)(0x56b140)
>> Command failed: 1:14: expected operand, found ')'
>> (dlv) p ("runtime".g*)(0x56b140)
>> Command failed: 1:14: expected operand, found ')'
>>
>> Thanks.
>>
>> On Tuesday, November 12, 2019 at 2:28:12 AM UTC+8, Derek Parker wrote:
>>>
>>> Can you reply with a gist showing the exact Delve commands you are
>>> attempting to use and what errors are being returned?
>>>
>>> There is some more information on the expression parser here
>>> <https://github.com/go-delve/delve/blob/master/Documentation/cli/expr.md>.
>>> You can also open an issue on the Delve Github repo and we can help you out
>>> over there as well.
>>>
>>> On Sunday, November 10, 2019 at 11:58:24 PM UTC-8, Xiangdong JI wrote:
>>>>
>>>> Given a valid goroutine structure's pointer, say retrieving from the
>>>> register 'g', how can I convert it to 'struct g' in delve or gdb?
>>>>
>>>> gdb usually reports "A syntax error in expression ...", and delve
>>>> issues various "Command failed" message (failed to figure the proper way
>>>> of
>>>> converting a literal, I guess).
>>>>
>>>> Thanks.
>>>>
>>>
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