[PATCH] JIT/RTDyld memory managers should know section names

Kaylor, Andrew andrew.kaylor at intel.com
Tue Oct 1 16:24:29 PDT 2013

Hi Filip,

This looks good.  Can you document the new parameter in the comments, at least in RTDyldMemoryManager.h, and mention the fact that multiple sections may be allocated with the same name?  That will definitely happen with multiple module support.

Thanks for the patch!  I've already got a use in mind for it.


From: llvm-commits-bounces at cs.uiuc.edu [mailto:llvm-commits-bounces at cs.uiuc.edu] On Behalf Of Filip Pizlo
Sent: Tuesday, October 01, 2013 4:10 PM
To: llvm-commits at cs.uiuc.edu
Subject: [PATCH] JIT/RTDyld memory managers should know section names

This patch threads SectionName through the allocateCodeSection/allocateDataSection APIs, both in C++ and C land.  It's useful for the memory managers that are allocating a section to know what the name of the section is.  At a minimum, this is extremely useful for low-level debugging - it's customary for JITs to be able to tell you what memory they allocated, and as part of any such dump, they should be able to tell you some meta-data about what each allocation is for.  This allows clients that supply their own memory managers to do this.  Additionally, we also envision the SectionName being useful for passing meta-data from within LLVM to an LLVM client.

This changes both the C and C++ APIs, and all of the clients of those APIs within LLVM.  I'm assuming that it's safe to change the C++ API because that API is allowed to change.  I'm assuming that it's safe to change the C API because we haven't shipped the API in a release yet (LLVM 3.3 doesn't include the MCJIT memory management C API).

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