On Saturday, 24 June 2017 at 18:05:55 UTC, ketmar wrote:
Petar Kirov [ZombineDev] wrote:
***
But in any case, the null-terminated string was just an
example application.
I'm interested in a fast way to determine the "storage class"
of the memory
a slice or a pointer point to. I'm expecting some magic along
the lines of
checking the range of addresses that the rodata section
resides in memory.
Similar to how some allocators or the GC know if they own a
range of memory.
Any ideas on that?
***
the only query you can do is GC query (see `core.memory.CG`
namespace, `addrOf()` API, for example). it will tell you if
something was allocated with D GC or not.
yet it is not guaranteed to be fast (althru it is usually "fast
enough").
I'm not interested in asking the GC specifically,
but I have looked at its implementation and I know
that it keeps such information around:
https://github.com/dlang/druntime/blob/v2.074.1/src/gc/impl/conservative/gc.d#L843
i think this is all what you can get without resorting to ugly
platform-specific hacks (that will inevitably break ;-).
Oh, I should have mentioned that I don't expect anything but ugly
platform-specific hacks possibly involving the object file format
;)
Just enough of them to claim that the solution is somewhat
cross-platform :D
