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-rw-r--r--erts/emulator/sys/common/erl_mmap.c68
-rw-r--r--erts/emulator/sys/common/erl_mmap.h2
-rw-r--r--erts/emulator/sys/common/erl_mseg.c4
3 files changed, 44 insertions, 30 deletions
diff --git a/erts/emulator/sys/common/erl_mmap.c b/erts/emulator/sys/common/erl_mmap.c
index 756d038da4..f5f40b35a8 100644
--- a/erts/emulator/sys/common/erl_mmap.c
+++ b/erts/emulator/sys/common/erl_mmap.c
@@ -294,10 +294,11 @@ typedef struct {
}ErtsFreeSegMap;
struct ErtsMemMapper_ {
- int (*reserve_physical)(char *, UWord);
+ int (*reserve_physical)(char *, UWord, int exec);
void (*unreserve_physical)(char *, UWord);
int supercarrier;
int no_os_mmap;
+ int executable; /* is client a native code allocator? */
/*
* Super unaligned area is located above super aligned
* area. That is, `sa.bot` is beginning of the super
@@ -1232,6 +1233,7 @@ Eterm build_free_seg_list(Process* p, ErtsFreeSegMap* map)
#if HAVE_MMAP
# define ERTS_MMAP_PROT (PROT_READ|PROT_WRITE)
+# define ERTS_MMAP_PROT_EXEC (PROT_READ|PROT_WRITE|PROT_EXEC)
# if defined(MAP_ANONYMOUS)
# define ERTS_MMAP_FLAGS (MAP_ANON|MAP_PRIVATE)
# define ERTS_MMAP_FD (-1)
@@ -1245,24 +1247,26 @@ Eterm build_free_seg_list(Process* p, ErtsFreeSegMap* map)
#endif
static ERTS_INLINE void *
-os_mmap(void *hint_ptr, UWord size, int try_superalign)
+os_mmap(void *hint_ptr, UWord size, int try_superalign, int executable)
{
#if HAVE_MMAP
+ const int prot = executable ? ERTS_MMAP_PROT_EXEC : ERTS_MMAP_PROT;
void *res;
#ifdef MAP_ALIGN
if (try_superalign)
- res = mmap((void *) ERTS_SUPERALIGNED_SIZE, size, ERTS_MMAP_PROT,
+ res = mmap((void *) ERTS_SUPERALIGNED_SIZE, size, prot,
ERTS_MMAP_FLAGS|MAP_ALIGN, ERTS_MMAP_FD, 0);
else
#endif
- res = mmap((void *) hint_ptr, size, ERTS_MMAP_PROT,
+ res = mmap((void *) hint_ptr, size, prot,
ERTS_MMAP_FLAGS, ERTS_MMAP_FD, 0);
if (res == MAP_FAILED)
return NULL;
return res;
#elif HAVE_VIRTUALALLOC
+ const DWORD prot = executable ? PAGE_EXECUTE_READWRITE : PAGE_READWRITE;
return (void *) VirtualAlloc(NULL, (SIZE_T) size,
- MEM_COMMIT|MEM_RESERVE, PAGE_READWRITE);
+ MEM_COMMIT|MEM_RESERVE, prot);
#else
# error "missing mmap() or similar"
#endif
@@ -1319,6 +1323,7 @@ os_mremap(void *ptr, UWord old_size, UWord new_size, int try_superalign)
#if HAVE_MMAP
#define ERTS_MMAP_RESERVE_PROT (ERTS_MMAP_PROT)
+#define ERTS_MMAP_RESERVE_PROT_EXEC (ERTS_MMAP_PROT_EXEC)
#define ERTS_MMAP_RESERVE_FLAGS (ERTS_MMAP_FLAGS|MAP_FIXED)
#define ERTS_MMAP_UNRESERVE_PROT (PROT_NONE)
#define ERTS_MMAP_UNRESERVE_FLAGS (ERTS_MMAP_FLAGS|MAP_NORESERVE|MAP_FIXED)
@@ -1326,9 +1331,10 @@ os_mremap(void *ptr, UWord old_size, UWord new_size, int try_superalign)
#define ERTS_MMAP_VIRTUAL_FLAGS (ERTS_MMAP_FLAGS|MAP_NORESERVE)
static int
-os_reserve_physical(char *ptr, UWord size)
+os_reserve_physical(char *ptr, UWord size, int exec)
{
- void *res = mmap((void *) ptr, (size_t) size, ERTS_MMAP_RESERVE_PROT,
+ const int prot = exec ? ERTS_MMAP_RESERVE_PROT_EXEC : ERTS_MMAP_RESERVE_PROT;
+ void *res = mmap((void *) ptr, (size_t) size, prot,
ERTS_MMAP_RESERVE_FLAGS, ERTS_MMAP_FD, 0);
if (res == (void *) MAP_FAILED)
return 0;
@@ -1361,7 +1367,7 @@ os_mmap_virtual(char *ptr, UWord size)
#endif /* ERTS_HAVE_OS_MMAP */
-static int reserve_noop(char *ptr, UWord size)
+static int reserve_noop(char *ptr, UWord size, int exec)
{
#ifdef ERTS_MMAP_DEBUG_FILL_AREAS
Uint32 *uip, *end = (Uint32 *) (ptr + size);
@@ -1404,7 +1410,7 @@ alloc_desc_insert_free_seg(ErtsMemMapper* mm,
#if ERTS_HAVE_OS_MMAP
if (!mm->no_os_mmap) {
- ptr = os_mmap(mm->desc.new_area_hint, ERTS_PAGEALIGNED_SIZE, 0);
+ ptr = os_mmap(mm->desc.new_area_hint, ERTS_PAGEALIGNED_SIZE, 0, 0);
if (ptr) {
mm->desc.new_area_hint = ptr+ERTS_PAGEALIGNED_SIZE;
ERTS_MMAP_SIZE_OS_INC(ERTS_PAGEALIGNED_SIZE);
@@ -1423,7 +1429,7 @@ alloc_desc_insert_free_seg(ErtsMemMapper* mm,
da_map = &mm->sua.map;
desc = lookup_free_seg(da_map, ERTS_PAGEALIGNED_SIZE);
if (desc) {
- if (mm->reserve_physical(desc->start, ERTS_PAGEALIGNED_SIZE))
+ if (mm->reserve_physical(desc->start, ERTS_PAGEALIGNED_SIZE, 0))
ERTS_MMAP_SIZE_SC_SUA_INC(ERTS_PAGEALIGNED_SIZE);
else
desc = NULL;
@@ -1433,7 +1439,7 @@ alloc_desc_insert_free_seg(ErtsMemMapper* mm,
da_map = &mm->sa.map;
desc = lookup_free_seg(da_map, ERTS_PAGEALIGNED_SIZE);
if (desc) {
- if (mm->reserve_physical(desc->start, ERTS_PAGEALIGNED_SIZE))
+ if (mm->reserve_physical(desc->start, ERTS_PAGEALIGNED_SIZE, 0))
ERTS_MMAP_SIZE_SC_SA_INC(ERTS_PAGEALIGNED_SIZE);
else
desc = NULL;
@@ -1494,7 +1500,7 @@ erts_mmap(ErtsMemMapper* mm, Uint32 flags, UWord *sizep)
if (desc) {
seg = desc->start;
end = seg+asize;
- if (!mm->reserve_physical(seg, asize))
+ if (!mm->reserve_physical(seg, asize, mm->executable))
goto supercarrier_reserve_failure;
if (desc->end == end) {
delete_free_seg(&mm->sua.map, desc);
@@ -1509,8 +1515,8 @@ erts_mmap(ErtsMemMapper* mm, Uint32 flags, UWord *sizep)
}
if (asize <= mm->sua.bot - mm->sa.top) {
- if (!mm->reserve_physical(mm->sua.bot - asize,
- asize))
+ if (!mm->reserve_physical(mm->sua.bot - asize, asize,
+ mm->executable))
goto supercarrier_reserve_failure;
mm->sua.bot -= asize;
seg = mm->sua.bot;
@@ -1526,7 +1532,8 @@ erts_mmap(ErtsMemMapper* mm, Uint32 flags, UWord *sizep)
char *start = seg = desc->start;
seg = (char *) ERTS_SUPERALIGNED_CEILING(seg);
end = seg+asize;
- if (!mm->reserve_physical(start, (UWord) (end - start)))
+ if (!mm->reserve_physical(start, (UWord) (end - start),
+ mm->executable))
goto supercarrier_reserve_failure;
ERTS_MMAP_SIZE_SC_SA_INC(asize);
if (desc->end == end) {
@@ -1558,7 +1565,8 @@ erts_mmap(ErtsMemMapper* mm, Uint32 flags, UWord *sizep)
if (asize + (seg - start) <= mm->sua.bot - start) {
end = seg + asize;
- if (!mm->reserve_physical(start, (UWord) (end - start)))
+ if (!mm->reserve_physical(start, (UWord) (end - start),
+ mm->executable))
goto supercarrier_reserve_failure;
mm->sa.top = end;
ERTS_MMAP_SIZE_SC_SA_INC(asize);
@@ -1580,7 +1588,8 @@ erts_mmap(ErtsMemMapper* mm, Uint32 flags, UWord *sizep)
seg = (char *) ERTS_SUPERALIGNED_CEILING(org_start);
end = seg + asize;
- if (!mm->reserve_physical(seg, (UWord) (org_end - seg)))
+ if (!mm->reserve_physical(seg, (UWord) (org_end - seg),
+ mm->executable))
goto supercarrier_reserve_failure;
ERTS_MMAP_SIZE_SC_SUA_INC(asize);
if (org_start != seg) {
@@ -1613,13 +1622,13 @@ erts_mmap(ErtsMemMapper* mm, Uint32 flags, UWord *sizep)
/* Map using OS primitives */
if (!(ERTS_MMAPFLG_SUPERCARRIER_ONLY & flags) && !mm->no_os_mmap) {
if (!(ERTS_MMAPFLG_SUPERALIGNED & flags)) {
- seg = os_mmap(NULL, asize, 0);
+ seg = os_mmap(NULL, asize, 0, mm->executable);
if (!seg)
goto failure;
}
else {
asize = ERTS_SUPERALIGNED_CEILING(*sizep);
- seg = os_mmap(NULL, asize, 1);
+ seg = os_mmap(NULL, asize, 1, mm->executable);
if (!seg)
goto failure;
@@ -1629,7 +1638,8 @@ erts_mmap(ErtsMemMapper* mm, Uint32 flags, UWord *sizep)
os_munmap(seg, asize);
- ptr = os_mmap(NULL, asize + ERTS_SUPERALIGNED_SIZE, 1);
+ ptr = os_mmap(NULL, asize + ERTS_SUPERALIGNED_SIZE, 1,
+ mm->executable);
if (!ptr)
goto failure;
@@ -1964,7 +1974,8 @@ erts_mremap(ErtsMemMapper* mm,
if (next && new_end <= next->end) {
if (!mm->reserve_physical(((char *) ptr) + old_size,
- asize - old_size))
+ asize - old_size,
+ mm->executable))
goto supercarrier_reserve_failure;
if (new_end < next->end)
resize_free_seg(&mm->sua.map, next, new_end, next->end);
@@ -1982,7 +1993,8 @@ erts_mremap(ErtsMemMapper* mm,
if (end == mm->sa.top) {
if (new_end <= mm->sua.bot) {
if (!mm->reserve_physical(((char *) ptr) + old_size,
- asize - old_size))
+ asize - old_size,
+ mm->executable))
goto supercarrier_reserve_failure;
mm->sa.top = new_end;
new_ptr = ptr;
@@ -1994,7 +2006,8 @@ erts_mremap(ErtsMemMapper* mm,
adjacent_free_seg(&mm->sa.map, start, end, &prev, &next);
if (next && new_end <= next->end) {
if (!mm->reserve_physical(((char *) ptr) + old_size,
- asize - old_size))
+ asize - old_size,
+ mm->executable))
goto supercarrier_reserve_failure;
if (new_end < next->end)
resize_free_seg(&mm->sa.map, next, new_end, next->end);
@@ -2112,7 +2125,7 @@ static void hard_dbg_mseg_init(void);
#endif
void
-erts_mmap_init(ErtsMemMapper* mm, ErtsMMapInit *init)
+erts_mmap_init(ErtsMemMapper* mm, ErtsMMapInit *init, int executable)
{
static int is_first_call = 1;
int virtual_map = 0;
@@ -2144,6 +2157,7 @@ erts_mmap_init(ErtsMemMapper* mm, ErtsMMapInit *init)
mm->supercarrier = 0;
mm->reserve_physical = reserve_noop;
mm->unreserve_physical = unreserve_noop;
+ mm->executable = executable;
#if HAVE_MMAP && !defined(MAP_ANON)
mm->mmap_fd = open("/dev/zero", O_RDWR);
@@ -2200,7 +2214,7 @@ erts_mmap_init(ErtsMemMapper* mm, ErtsMMapInit *init)
* The whole supercarrier will by physically
* reserved all the time.
*/
- start = os_mmap(NULL, sz, 1);
+ start = os_mmap(NULL, sz, 1, executable);
}
if (!start)
erts_exit(1,
@@ -2274,7 +2288,7 @@ erts_mmap_init(ErtsMemMapper* mm, ErtsMMapInit *init)
mm->sua.top -= ERTS_PAGEALIGNED_SIZE;
mm->size.supercarrier.used.total += ERTS_PAGEALIGNED_SIZE;
#ifdef ERTS_HAVE_OS_PHYSICAL_MEMORY_RESERVATION
- if (!virtual_map || os_reserve_physical(mm->sua.top, ERTS_PAGEALIGNED_SIZE))
+ if (!virtual_map || os_reserve_physical(mm->sua.top, ERTS_PAGEALIGNED_SIZE, 0))
#endif
add_free_desc_area(mm, mm->sua.top, end);
mm->desc.reserved += (end - mm->sua.top) / sizeof(ErtsFreeSegDesc);
@@ -2287,7 +2301,7 @@ erts_mmap_init(ErtsMemMapper* mm, ErtsMMapInit *init)
* will be used for free segment descritors.
*/
#ifdef ERTS_HAVE_OS_PHYSICAL_MEMORY_RESERVATION
- if (virtual_map && !os_reserve_physical(start, mm->sa.bot - start))
+ if (virtual_map && !os_reserve_physical(start, mm->sa.bot - start, 0))
erts_exit(1, "erts_mmap: Failed to reserve physical memory for descriptors\n");
#endif
mm->desc.unused_start = start;
diff --git a/erts/emulator/sys/common/erl_mmap.h b/erts/emulator/sys/common/erl_mmap.h
index 7c5ddbec0b..30548bd0b0 100644
--- a/erts/emulator/sys/common/erl_mmap.h
+++ b/erts/emulator/sys/common/erl_mmap.h
@@ -61,7 +61,7 @@ void *erts_mmap(ErtsMemMapper*, Uint32 flags, UWord *sizep);
void erts_munmap(ErtsMemMapper*, Uint32 flags, void *ptr, UWord size);
void *erts_mremap(ErtsMemMapper*, Uint32 flags, void *ptr, UWord old_size, UWord *sizep);
int erts_mmap_in_supercarrier(ErtsMemMapper*, void *ptr);
-void erts_mmap_init(ErtsMemMapper*, ErtsMMapInit*);
+void erts_mmap_init(ErtsMemMapper*, ErtsMMapInit*, int executable);
struct erts_mmap_info_struct
{
UWord sizes[6];
diff --git a/erts/emulator/sys/common/erl_mseg.c b/erts/emulator/sys/common/erl_mseg.c
index 286130bece..f0fbb682b0 100644
--- a/erts/emulator/sys/common/erl_mseg.c
+++ b/erts/emulator/sys/common/erl_mseg.c
@@ -1402,9 +1402,9 @@ erts_mseg_init(ErtsMsegInit_t *init)
erts_mtx_init(&init_atoms_mutex, "mseg_init_atoms");
- erts_mmap_init(&erts_dflt_mmapper, &init->dflt_mmap);
+ erts_mmap_init(&erts_dflt_mmapper, &init->dflt_mmap, 0);
#if defined(ARCH_64) && defined(ERTS_HAVE_OS_PHYSICAL_MEMORY_RESERVATION)
- erts_mmap_init(&erts_literal_mmapper, &init->literal_mmap);
+ erts_mmap_init(&erts_literal_mmapper, &init->literal_mmap, 0);
#endif
if (!IS_2POW(GET_PAGE_SIZE))
generated by cgit v1.2.3 (git 2.25.1) at 2024-11-06 19:43:51 +0000