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--- ElectricFence-2.2.2/page.c.jj 1999-04-11 17:45:26.000000000 -0400
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+++ ElectricFence-2.2.2/page.c 2004-10-16 12:30:10.000000000 -0400
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@@ -160,8 +160,9 @@ Page_DenyAccess(void * address, size_t s
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void
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Page_Delete(void * address, size_t size)
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{
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- if ( munmap((caddr_t)address, size) < 0 )
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- Page_DenyAccess(address, size);
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+ Page_DenyAccess(address, size);
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+ /* Tell the kernel we will never need it again. */
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+ madvise(address, size, MADV_DONTNEED);
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}
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#if defined(_SC_PAGESIZE)
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--- ElectricFence-2.2.2/efence.c.jj 1999-04-12 21:00:49.000000000 -0400
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+++ ElectricFence-2.2.2/efence.c 2004-10-16 13:11:30.000000000 -0400
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@@ -626,10 +626,7 @@ memalign(size_t alignment, size_t userSi
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address += internalSize - bytesPerPage;
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/* Set up the "dead" page. */
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- if ( EF_PROTECT_FREE )
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- Page_Delete(address, bytesPerPage);
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- else
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- Page_DenyAccess(address, bytesPerPage);
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+ Page_Delete(address, bytesPerPage);
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/* Figure out what address to give the user. */
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address -= userSize;
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@@ -643,11 +640,8 @@ memalign(size_t alignment, size_t userSi
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address = (char *)fullSlot->internalAddress;
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/* Set up the "dead" page. */
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- if ( EF_PROTECT_FREE )
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- Page_Delete(address, bytesPerPage);
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- else
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- Page_DenyAccess(address, bytesPerPage);
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-
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+ Page_Delete(address, bytesPerPage);
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+
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address += bytesPerPage;
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/* Set up the "live" page. */
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@@ -777,10 +771,7 @@ free(void * address)
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* in the hope that the swap space attached to those pages will be
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* released as well.
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*/
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- if ( EF_PROTECT_FREE )
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- Page_Delete(slot->internalAddress, slot->internalSize);
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- else
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- Page_DenyAccess(slot->internalAddress, slot->internalSize);
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+ Page_Delete(slot->internalAddress, slot->internalSize);
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previousSlot = slotForInternalAddressPreviousTo(slot->internalAddress);
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nextSlot = slotForInternalAddress(
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