GCC address sanitizer - supported architecture

[Kewen.Lin]

Hi Qingnan,

on 2020/12/24 上午11:23, Qingnan Duan via Gcc-help wrote:
> Hi everyone,
> I was looking at this page Instrumentation Options (Using the GNU Compiler Collection (GCC))<https://gcc.gnu.org/onlinedocs/gcc/Instrumentation-Options.html> and it says "-fsanitize=address" is only supported on AArch64. However, I was able to compile my code on x86-64 CPU with -fsanitize=address flag.
> 

I think the part "Note that the only target this option is currently supported on is AArch64. "
is specific for option “-fsanitize=hwaddress” not for option "-fsanitize=address".

Only aarch64 port re-defines TARGET_MEMTAG_CAN_TAG_ADDRESSES which is used for -fsanitize=hwaddress,
that matches the wordings.

By the way, I also felt a bit confused without digging, not sure whether it's confusing from
native speaker's perspective.  If yes, maybe it's worth to revise it somehow.  :)

> Is the document out-of-date? Or, does it mean the result of ASan is not guaranteed on any platform other than AArch64?
> Thanks in advance for your help!
> 
> Best regards,
> Qingnan Duan
> 

BR,
Kewen