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ITS#8324 fix for read-only envs

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This commit is contained in:
Howard Chu 2015-12-08 19:35:59 +00:00
parent 58d1fd4c73
commit 8b95e7d13e
1 changed files with 14 additions and 5 deletions
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19
libraries/liblmdb/mdb.c
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@ -4003,19 +4003,28 @@ mdb_env_map(MDB_env *env, void *addr)
int access = SECTION_MAP_READ;
HANDLE mh;
void *map;
size_t msize = 0;
ULONG pageprot = PAGE_READONLY;
size_t msize;
ULONG pageprot = PAGE_READONLY, secprot, alloctype;
if (flags & MDB_WRITEMAP) {
access |= SECTION_MAP_WRITE;
pageprot = PAGE_READWRITE;
}
if (flags & MDB_RDONLY) {
secprot = PAGE_READONLY;
msize = 0;
alloctype = 0;
} else {
secprot = PAGE_READWRITE;
msize = env->me_mapsize;
alloctype = MEM_RESERVE;
}
rc = NtCreateSection(&mh, access, NULL, NULL, PAGE_READWRITE, SEC_RESERVE, env->me_fd);
rc = NtCreateSection(&mh, access, NULL, NULL, secprot, SEC_RESERVE, env->me_fd);
if (rc)
return rc;
map = addr;
msize = env->me_mapsize;
rc = NtMapViewOfSection(mh, GetCurrentProcess(), &map, 0, 0, NULL, &msize, ViewUnmap, MEM_RESERVE, pageprot);
rc = NtMapViewOfSection(mh, GetCurrentProcess(), &map, 0, 0, NULL, &msize, ViewUnmap, alloctype, pageprot);
NtClose(mh);
if (rc)
return rc;