Thank you for your answer, this makes sense.
在 2019年7月9日星期二 UTC+8下午9:15:52，Than McIntosh写道：
>
> Hi,
>
> This is a good question, and I think it points out that the name of this
> command line flag ("-enable-gc") is not ideal. It should really be
> something more like "-enable-precise-stack-scan=<value>".
>
> The garbage collector used by gollvm is substantially the same as the one
> used by the main Go compiler. The main difference is that by default gollvm
> uses conservative stack scanning -- chunks of stack memory are scanned
> assuming that everything that might be a live heap pointer is indeed a live
> heap pointer. When you build with "-enable-gc=true" it turns on machinery
> in the compiler to enable precise stack scanning, meaning that the compiler
> emits stack maps and then the runtime uses those maps to look at only life
> heap pointers during scanning.
>
> There are some other small differences between Gollvm and GC garbage
> collection (notably the representation of the global roots list) but in
> general they are using pretty much the same collector.
>
> Thanks, Than
>
>
>
> On Tue, Jul 9, 2019 at 8:13 AM eric fang <[email protected]
> <javascript:>> wrote:
>
>> Hi Than, when I read the code, I found enable_gc_ is false by default,
>> the description of option "-enable-gc=<value>" is "Enable stack map
>> generation". I guess gollvm should have implemented garbage collection. My
>> question are:
>> 1, what kind of gc does gollvm currently implement, and what is the
>> difference between this gc and the one in main Go?
>>
>> 2, What effect does this option (-enable-gc) have on gollvm gc?
>>
>> Thanks!
>>
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