JehanneOS/newlib
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Throughout, change check for running under Windows NT to 'iswinnt'.

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* dcrt0.cc (set_os_type): Set 'iswinnt' appropriately.
* cygheap.cc (init_cheap): Revert to using VirtualAlloc for allocating cygheap.
(cygheap_setup_for_child_cleanup): New function.  Standard function to call
after calling CreateProcess to cleanup cygheap info passed to child.
(cygheap_fixup_in_child): Copy cygheap from shared memory into allocated space
under Windows 9x or if can't relocate shared space under NT.
* cygheap.h: Declare new function.
* spawn.cc (spawn_guts): Use cygheap_fixup_in_child.
* fork.cc (fork_parent): Ditto.
* winsup.h: Declare iswinnt.
This commit is contained in:
Christopher Faylor
2001-08-04 21:10:52 +00:00
parent 17195d08bc
commit e5ba4c060e
27 changed files with 105 additions and 76 deletions
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58
winsup/cygwin/cygheap.cc
View File

@@ -41,6 +41,9 @@ char *buckets[NBUCKETS] = {0};
#define N0 ((_cmalloc_entry *) NULL)
#define to_cmalloc(s) ((_cmalloc_entry *) (((char *) (s)) - (int) (N0->data)))
#define CFMAP_OPTIONS (SEC_RESERVE | PAGE_READWRITE)
#define MVMAP_OPTIONS (FILE_MAP_WRITE)
extern "C" {
static void __stdcall _cfree (void *ptr) __attribute__((regparm(1)));
}
@@ -48,17 +51,10 @@ static void __stdcall _cfree (void *ptr) __attribute__((regparm(1)));
inline static void
init_cheap ()
{
HANDLE cygheap_h;
cygheap_h = CreateFileMapping (INVALID_HANDLE_VALUE, &sec_none_nih,
PAGE_READWRITE | SEC_RESERVE, 0, CYGHEAPSIZE,
NULL);
cygheap = (init_cygheap *) MapViewOfFileEx (cygheap_h,
FILE_MAP_READ | FILE_MAP_WRITE,
0, 0, 0, NULL);
CloseHandle (cygheap_h);
cygheap = (init_cygheap *) VirtualAlloc (NULL, CYGHEAPSIZE, MEM_RESERVE, PAGE_NOACCESS);
if (!cygheap)
api_fatal ("Couldn't reserve space for cygwin's heap, %E");
cygheap_max = cygheap + 1;
api_fatal ("Couldn't reserve space for cygwin's heap, %E");
cygheap_max = cygheap + 1;
}
void __stdcall
@@ -68,10 +64,8 @@ cygheap_setup_for_child (child_info *ci)
cygheap_protect->acquire ();
unsigned n = (char *) cygheap_max - (char *) cygheap;
ci->cygheap_h = CreateFileMapping (INVALID_HANDLE_VALUE, &sec_none,
PAGE_READWRITE | SEC_RESERVE, 0,
CYGHEAPSIZE, NULL);
newcygheap = MapViewOfFileEx (ci->cygheap_h, FILE_MAP_READ | FILE_MAP_WRITE,
0, 0, 0, NULL);
CFMAP_OPTIONS, 0, CYGHEAPSIZE, NULL);
newcygheap = MapViewOfFileEx (ci->cygheap_h, MVMAP_OPTIONS, 0, 0, 0, NULL);
if (!VirtualAlloc (newcygheap, n, MEM_COMMIT, PAGE_READWRITE))
api_fatal ("couldn't allocate new cygwin heap for child, %E");
memcpy (newcygheap, cygheap, n);
@@ -83,26 +77,38 @@ cygheap_setup_for_child (child_info *ci)
return;
}
void __stdcall
cygheap_setup_for_child_cleanup (child_info *ci)
{
ForceCloseHandle1 (ci->cygheap_h, passed_cygheap_h);
}
/* Called by fork or spawn to reallocate cygwin heap */
void __stdcall
cygheap_fixup_in_child (child_info *ci, bool execed)
{
cygheap = ci->cygheap;
cygheap_max = ci->cygheap_max;
#if 0
if (!DuplicateHandle (hMainProc, ci->cygheap_h,
hMainProc, &cygheap_h, 0, 0,
DUPLICATE_SAME_ACCESS | DUPLICATE_CLOSE_SOURCE))
cygheap_h = ci->cygheap_h;
#endif
VirtualFree (cygheap, CYGHEAPSIZE, MEM_DECOMMIT);
VirtualFree (cygheap, 0, MEM_RELEASE);
if (MapViewOfFileEx (ci->cygheap_h, FILE_MAP_READ | FILE_MAP_WRITE,
0, 0, CYGHEAPSIZE, cygheap) != cygheap)
api_fatal ("Couldn't allocate space for child's cygwin heap from %p, to %p, %E",
cygheap, cygheap_max);
void *addr = iswinnt ? cygheap : NULL;
void *newaddr;
newaddr = MapViewOfFileEx (ci->cygheap_h, MVMAP_OPTIONS, 0, 0, 0, addr);
if (!iswinnt || newaddr != addr)
{
DWORD n = (DWORD) cygheap_max - (DWORD) cygheap;
/* Reserve cygwin heap in same spot as parent */
if (!VirtualAlloc (cygheap, CYGHEAPSIZE, MEM_RESERVE, PAGE_NOACCESS))
api_fatal ("Couldn't reserve space for cygwin's heap (%p) in child, cygheap, %E", cygheap);
/* Allocate same amount of memory as parent */
if (!VirtualAlloc (cygheap, n, MEM_COMMIT, PAGE_READWRITE))
api_fatal ("Couldn't allocate space for child's heap %p, size %d, %E",
cygheap, n);
memcpy (cygheap, newaddr, n);
UnmapViewOfFile (newaddr);
}
ForceCloseHandle1 (ci->cygheap_h, passed_cygheap_h);
cygheap_init ();
if (execed)