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Allocate 32 bit memory on WIN64 using NtAllocateVirtualMemory.

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This commit is contained in:
Mike Pall 2010-01-17 20:20:43 +01:00
parent 62fafb5a72
commit 49e3bdf080
1 changed files with 48 additions and 7 deletions
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55
src/lj_alloc.c
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@ -74,18 +74,54 @@
#ifdef LUA_USE_WIN
#if LJ_64
#error "missing support for WIN64 to allocate in lower 2G"
#endif
#define WIN32_LEAN_AND_MEAN
#include <windows.h>
#if LJ_64
/* Undocumented, but hey, that's what we all love so much about Windows. */
typedef long (*PNTAVM)(HANDLE handle, void **addr, ULONG zbits,
size_t *size, ULONG alloctype, ULONG prot);
static PNTAVM ntavm;
/* Number of top bits of the lower 32 bits of an address that must be zero.
** Apparently 0 gives us full 64 bit addresses and 1 gives us the lower 2GB.
*/
#define NTAVM_ZEROBITS 1
static void INIT_MMAP(void)
{
ntavm = (PNTAVM)GetProcAddress(GetModuleHandle("ntdll.dll"),
"NtAllocateVirtualMemory");
}
/* Win64 32 bit MMAP via NtAllocateVirtualMemory. */
static LJ_AINLINE void *CALL_MMAP(size_t size)
{
void *ptr = NULL;
long st = ntavm(INVALID_HANDLE_VALUE, &ptr, NTAVM_ZEROBITS, &size,
MEM_RESERVE|MEM_COMMIT, PAGE_READWRITE);
return st == 0 ? ptr : MFAIL;
}
/* For direct MMAP, use MEM_TOP_DOWN to minimize interference */
static LJ_AINLINE void *DIRECT_MMAP(size_t size)
{
void *ptr = NULL;
long st = ntavm(INVALID_HANDLE_VALUE, &ptr, NTAVM_ZEROBITS, &size,
MEM_RESERVE|MEM_COMMIT|MEM_TOP_DOWN, PAGE_READWRITE);
return st == 0 ? ptr : MFAIL;
}
#else
#define INIT_MMAP() ((void)0)
/* Win32 MMAP via VirtualAlloc */
static LJ_AINLINE void *CALL_MMAP(size_t size)
{
void *ptr = VirtualAlloc(0, size, MEM_RESERVE|MEM_COMMIT, PAGE_READWRITE);
return (ptr != 0)? ptr: MFAIL;
return ptr ? ptr : MFAIL;
}
/* For direct MMAP, use MEM_TOP_DOWN to minimize interference */
@ -93,9 +129,11 @@ static LJ_AINLINE void *DIRECT_MMAP(size_t size)
{
void *ptr = VirtualAlloc(0, size, MEM_RESERVE|MEM_COMMIT|MEM_TOP_DOWN,
PAGE_READWRITE);
return (ptr != 0)? ptr: MFAIL;
return ptr ? ptr : MFAIL;
}
#endif
/* This function supports releasing coalesed segments */
static LJ_AINLINE int CALL_MUNMAP(void *ptr, size_t size)
{
@ -130,6 +168,7 @@ static LJ_AINLINE int CALL_MUNMAP(void *ptr, size_t size)
#define MMAP_FLAGS (MAP_PRIVATE|MAP_ANONYMOUS)
#endif
#define INIT_MMAP() ((void)0)
#define CALL_MMAP(s) mmap(0, (s), MMAP_PROT, MMAP_FLAGS, -1, 0)
#define DIRECT_MMAP(s) CALL_MMAP(s)
#define CALL_MUNMAP(a, s) munmap((a), (s))
@ -989,7 +1028,9 @@ static void *tmalloc_small(mstate m, size_t nb)
void *lj_alloc_create(void)
{
size_t tsize = DEFAULT_GRANULARITY;
char *tbase = (char *)(CALL_MMAP(tsize));
char *tbase;
INIT_MMAP();
tbase = (char *)(CALL_MMAP(tsize));
if (tbase != CMFAIL) {
size_t msize = pad_request(sizeof(struct malloc_state));
mchunkptr mn;