[PATCH] Allow to use different prefixes for jemalloc-specific functions and libc functions

[Jason Evans]

On Mar 1, 2012, at 6:44 AM, Mike Hommey wrote:
> On Wed, Feb 29, 2012 at 04:15:37PM -0800, Jason Evans wrote:
>> On Feb 23, 2012, at 3:23 AM, Mike Hommey wrote:
>>> From: Mike Hommey <mh at glandium.org>
>>> 
>>> In some cases, it can be interesting to use different prefixes for
>>> the "standard" libc malloc functions and for jemalloc specific
>>> functions. One such case is to use the "__wrap_" prefix on libc
>>> malloc functions (for use with ld's --wrap option) and no prefix or
>>> "je_" for jemalloc functions.
>>> 
>>> In such cases, it can also me interesting not to exclude memalign
>>> and valloc, so this change also adds an option not to omit them when
>>> the prefix is set.
>> 
>> Do you have a practical use case that makes this a compelling feature?
>> I'm reluctant to hard-code the set of JEMALLOC_LIBC() functions to
>> make distinct from JEMALLOC_P() functions, because it may vary by
>> operating system.
> 
> The exact one that is in the patch message: on android, we use ld's
> --wrap option to wrap the "standard" libc functions. It is cumbersome
> to have to use --wrap for jemalloc-specific functions as well.
> Arguably, we could probably use symbol aliases when linking the library
> containing jemalloc.

I went a slightly different direction with this and added --with-mangling:

  http://www.canonware.com/cgi-bin/gitweb.cgi?p=jemalloc.git;a=commitdiff;h=0a5489e37da88a1a50fbf8552e0d3a7f8fd93ffc

Please let me know if this fails to meet your needs for some reason.

Thanks,
Jason