Re: [Libunwind-devel] the behavior of unw_set_caching_policy

[Masatake YAMATO]

Thank you very much.

Masatake YAMATO

> On Wed, Dec 18, 2013 at 8:34 AM, Masatake YAMATO <address@hidden> wrote:
>> Thank you for replying.
>>
>> You wrote "if you're unwinding from the same IP address repeatedly."
>>
>> About strace my understanding is that invalidation is required when
>> the target process calls system call which modifies the address space
>> like mmap and execve because even IP address is the same IP can point
>> different library or executable. Is this correct?
> 
> That's right. You don't have to worry about data getting
> mapped/unmapped. But dynamically generated code or code that gets
> remapped at runtime needs cache invalidation.
> There is a man page for libunwind-dynamic, with an API to be used by
> JITs. But it was never tested on x86 to my knowledge.
> 
>  -Arun