Bug 140143 – Source/WTF/wtf/OSAllocatorPosix.cpp fails to build on OS X Leopard due to madvise() extensions not being available

• Status: NEW
• Component: Web Template Framework

[Jeremy Huddleston Sequoia]

Compilation of webkit-gtk-2.4.7 fails on OS X Leopard:

:info:build Source/WTF/wtf/OSAllocatorPosix.cpp:54:35: error: use of undeclared identifier 'MADV_FREE_REUSABLE'
:info:build     while (madvise(result, bytes, MADV_FREE_REUSABLE) == -1 && errno == EAGAIN) { }
:info:build                                   ^
:info:build Source/WTF/wtf/OSAllocatorPosix.cpp:139:36: error: use of undeclared identifier 'MADV_FREE_REUSE'
:info:build     while (madvise(address, bytes, MADV_FREE_REUSE) == -1 && errno == EAGAIN) { }
:info:build                                    ^
:info:build Source/WTF/wtf/OSAllocatorPosix.cpp:156:36: error: use of undeclared identifier 'MADV_FREE_REUSABLE'
:info:build     while (madvise(address, bytes, MADV_FREE_REUSABLE) == -1 && errno == EAGAIN) { }
:info:build                                    ^
:info:build 3 errors generated.
:info:build GNUmakefile:52455: recipe for target 'Source/WTF/wtf/libWTF_la-OSAllocatorPosix.lo' failed
:info:build gmake: *** [Source/WTF/wtf/libWTF_la-OSAllocatorPosix.lo] Error 1

This happens because Leopard does not support:

#define MADV_ZERO_WIRED_PAGES   6       /* zero the wired pages that have not been unwired before the entry is deleted */
#define MADV_FREE_REUSABLE      7       /* pages can be reused (by anyone) */
#define MADV_FREE_REUSE         8       /* caller wants to reuse those pages */
#define MADV_CAN_REUSE          9

[Jeremy Huddleston Sequoia]

It looks like the code is guarded:

#elif HAVE(MADV_FREE_REUSE)
    while (madvise(address, bytes, MADV_FREE_REUSABLE) == -1 && errno == EAGAIN) { }

so the issue is that HAVE(MADV_FREE_REUSE) is not working right.

[Jeremy Huddleston Sequoia]

I'm testing a patch of Platform.h for Leopard now.

[Jeremy Huddleston Sequoia]

Created attachment 244284 [details]
Fix Platform.h for Leopard

[Jeremy Huddleston Sequoia]

Created attachment 244285 [details]
Fix malloc struct for Leopard

[Jeremy Huddleston Sequoia]

With these two patches, webkit-gtk builds correctly against the Leopard SDK.