2009-04-25 Jan Michael Alonzo <jmalonzo@webkit.org>

        Reviewed by Oliver Hunt.

        Gtk build fix - check if we have MADV_FREE before using it.

        * interpreter/RegisterFile.cpp:
        (JSC::RegisterFile::releaseExcessCapacity):
        * wtf/Platform.h:

git-svn-id: svn://svn.chromium.org/blink/trunk@42862 bbb929c8-8fbe-4397-9dbb-9b2b20218538

third_party/WebKit/JavaScriptCore/ChangeLog

+2009-04-25  Jan Michael Alonzo  <jmalonzo@webkit.org>
+
+        Reviewed by Oliver Hunt.
+
+        Gtk build fix - check if we have MADV_FREE before using it.
+
+        * interpreter/RegisterFile.cpp:
+        (JSC::RegisterFile::releaseExcessCapacity):
+        * wtf/Platform.h:
+
 2009-04-24  Kevin Ollivier  <kevino@theolliviers.com>
 
         wx build fix. Switching JSCore from a static lib to a dynamic lib

third_party/WebKit/JavaScriptCore/interpreter/RegisterFile.cpp

@@ -47,7 +47,7 @@ void RegisterFile::releaseExcessCapacity()
     m_maxUsed = m_start;
     void* memoryToRelease = reinterpret_cast<void*>(reinterpret_cast<uintptr_t>(reinterpret_cast<char*>(m_start) + commitSize * 2 - 1) & ~(commitSize - 1));
     ptrdiff_t size = reinterpret_cast<char*>(m_end) - reinterpret_cast<char*>(memoryToRelease);
-#if HAVE(MMAP) && !HAVE(VIRTUALALLOC)
+#if HAVE(MMAP) && HAVE(MADV_FREE) && !HAVE(VIRTUALALLOC)
     while (madvise(memoryToRelease, size, MADV_FREE) == -1 && errno == EAGAIN) { }
 #elif HAVE(VIRTUALALLOC)
     VirtualFree(memoryToRelease, size, MEM_DECOMMIT);

third_party/WebKit/JavaScriptCore/wtf/Platform.h

@@ -398,6 +398,10 @@
 
 #endif
 
+#if defined(MADV_FREE)
+#define HAVE_MADV_FREE 1
+#endif
+
 /* ENABLE macro defaults */
 
 /* fastMalloc match validation allows for runtime verification that