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Create the system heap event before the shared mapping to avoid a race

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condition.
This commit is contained in:
Alexandre Julliard 2004-04-29 20:02:01 +00:00
parent 0f6af2cee0
commit c749433e26
1 changed files with 4 additions and 13 deletions
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17
dlls/kernel/heap.c
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@ -85,8 +85,9 @@ inline static HANDLE HEAP_CreateSystemHeap(void)
int created;
void *base;
HANDLE map, event;
UNICODE_STRING event_name;
OBJECT_ATTRIBUTES event_attr;
/* create the system heap event first */
event = CreateEventA( NULL, TRUE, FALSE, "__SystemHeapEvent" );
if (!(map = CreateFileMappingA( INVALID_HANDLE_VALUE, NULL, SEC_COMMIT | PAGE_READWRITE,
0, SYSTEM_HEAP_SIZE, "__SystemHeap" ))) return 0;
@ -99,21 +100,11 @@ inline static HANDLE HEAP_CreateSystemHeap(void)
return 0;
}
/* create the system heap event */
RtlCreateUnicodeStringFromAsciiz( &event_name, "__SystemHeapEvent" );
event_attr.Length = sizeof(event_attr);
event_attr.RootDirectory = 0;
event_attr.ObjectName = &event_name;
event_attr.Attributes = 0;
event_attr.SecurityDescriptor = NULL;
event_attr.SecurityQualityOfService = NULL;
NtCreateEvent( &event, EVENT_ALL_ACCESS, &event_attr, TRUE, FALSE );
if (created) /* newly created heap */
{
systemHeap = RtlCreateHeap( HEAP_SHARED, base, SYSTEM_HEAP_SIZE,
SYSTEM_HEAP_SIZE, NULL, NULL );
NtSetEvent( event, NULL );
SetEvent( event );
}
else
{