2 * mono-mmap-windows.c: Windows support for mapping code into the process address space
5 * Mono Team (mono-list@lists.ximian.com)
7 * Copyright 2001-2008 Novell, Inc.
8 * Licensed under the MIT license. See LICENSE file in the project root for full license information.
14 #if defined(HOST_WIN32)
16 #include "mono/utils/mono-mmap-windows-internals.h"
17 #include <mono/utils/mono-counters.h>
20 static void *malloced_shared_area = NULL;
26 static int saved_pagesize = 0;
28 return saved_pagesize;
29 GetSystemInfo (&info);
30 saved_pagesize = info.dwPageSize;
31 return saved_pagesize;
35 mono_valloc_granule (void)
38 static int saved_valloc_granule = 0;
39 if (saved_valloc_granule)
40 return saved_valloc_granule;
41 GetSystemInfo (&info);
42 saved_valloc_granule = info.dwAllocationGranularity;
43 return saved_valloc_granule;
47 mono_mmap_win_prot_from_flags (int flags)
49 int prot = flags & (MONO_MMAP_READ|MONO_MMAP_WRITE|MONO_MMAP_EXEC);
51 case 0: prot = PAGE_NOACCESS; break;
52 case MONO_MMAP_READ: prot = PAGE_READONLY; break;
53 case MONO_MMAP_READ|MONO_MMAP_EXEC: prot = PAGE_EXECUTE_READ; break;
54 case MONO_MMAP_READ|MONO_MMAP_WRITE: prot = PAGE_READWRITE; break;
55 case MONO_MMAP_READ|MONO_MMAP_WRITE|MONO_MMAP_EXEC: prot = PAGE_EXECUTE_READWRITE; break;
56 case MONO_MMAP_WRITE: prot = PAGE_READWRITE; break;
57 case MONO_MMAP_WRITE|MONO_MMAP_EXEC: prot = PAGE_EXECUTE_READWRITE; break;
58 case MONO_MMAP_EXEC: prot = PAGE_EXECUTE; break;
60 g_assert_not_reached ();
66 mono_valloc (void *addr, size_t length, int flags, MonoMemAccountType type)
69 int mflags = MEM_RESERVE|MEM_COMMIT;
70 int prot = mono_mmap_win_prot_from_flags (flags);
71 /* translate the flags */
73 ptr = VirtualAlloc (addr, length, mflags, prot);
75 account_mem (type, (ssize_t)length);
81 mono_valloc_aligned (size_t length, size_t alignment, int flags, MonoMemAccountType type)
83 int prot = mono_mmap_win_prot_from_flags (flags);
84 char *mem = VirtualAlloc (NULL, length + alignment, MEM_RESERVE, prot);
90 aligned = aligned_address (mem, length, alignment);
92 aligned = VirtualAlloc (aligned, length, MEM_COMMIT, prot);
95 account_mem (type, (ssize_t)length);
101 mono_vfree (void *addr, size_t length, MonoMemAccountType type)
103 MEMORY_BASIC_INFORMATION mbi;
104 SIZE_T query_result = VirtualQuery (addr, &mbi, sizeof (mbi));
107 g_assert (query_result);
109 res = VirtualFree (mbi.AllocationBase, 0, MEM_RELEASE);
113 account_mem (type, -(ssize_t)length);
118 #if G_HAVE_API_SUPPORT(HAVE_CLASSIC_WINAPI_SUPPORT)
120 mono_file_map (size_t length, int flags, int fd, guint64 offset, void **ret_handle)
124 HANDLE file, mapping;
125 int prot = mono_mmap_win_prot_from_flags (flags);
126 /* translate the flags */
127 /*if (flags & MONO_MMAP_PRIVATE)
128 mflags |= MAP_PRIVATE;
129 if (flags & MONO_MMAP_SHARED)
130 mflags |= MAP_SHARED;
131 if (flags & MONO_MMAP_ANON)
132 mflags |= MAP_ANONYMOUS;
133 if (flags & MONO_MMAP_FIXED)
135 if (flags & MONO_MMAP_32BIT)
136 mflags |= MAP_32BIT;*/
138 mflags = FILE_MAP_READ;
139 if (flags & MONO_MMAP_WRITE)
140 mflags = FILE_MAP_COPY;
142 file = (HANDLE) _get_osfhandle (fd);
144 mapping = CreateFileMapping (file, NULL, prot, 0, 0, NULL);
149 ptr = MapViewOfFile (mapping, mflags, 0, offset, length);
152 CloseHandle (mapping);
155 *ret_handle = (void*)mapping;
160 mono_file_unmap (void *addr, void *handle)
162 UnmapViewOfFile (addr);
163 CloseHandle ((HANDLE)handle);
166 #endif /* G_HAVE_API_SUPPORT(HAVE_CLASSIC_WINAPI_SUPPORT) */
169 mono_mprotect (void *addr, size_t length, int flags)
172 int prot = mono_mmap_win_prot_from_flags (flags);
174 if (flags & MONO_MMAP_DISCARD) {
175 VirtualFree (addr, length, MEM_DECOMMIT);
176 VirtualAlloc (addr, length, MEM_COMMIT, prot);
179 return VirtualProtect (addr, length, prot, &oldprot) == 0;
183 mono_shared_area (void)
185 if (!malloced_shared_area)
186 malloced_shared_area = malloc_shared_area (0);
187 /* get the pid here */
188 return malloced_shared_area;
192 mono_shared_area_remove (void)
194 if (malloced_shared_area)
195 g_free (malloced_shared_area);
196 malloced_shared_area = NULL;
200 mono_shared_area_for_pid (void *pid)
206 mono_shared_area_unload (void *area)
211 mono_shared_area_instances (void **array, int count)