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comparison gcc/config/i386/host-mingw32.c @ 57:326d9e06c2e3

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modify c-parser.c
author ryoma <e075725@ie.u-ryukyu.ac.jp>
date Mon, 15 Feb 2010 00:54:17 +0900
parents 77e2b8dfacca
children f6334be47118
comparison
equal deleted inserted replaced
54:f62c169bbc24 57:326d9e06c2e3
1 /* mingw32 host-specific hook definitions. 1 /* mingw32 host-specific hook definitions.
2 Copyright (C) 2004, 2007 Free Software Foundation, Inc. 2 Copyright (C) 2004, 2007, 2009 Free Software Foundation, Inc.
3 3
4 This file is part of GCC. 4 This file is part of GCC.
5 5
6 GCC is free software; you can redistribute it and/or modify it 6 GCC is free software; you can redistribute it and/or modify it
7 under the terms of the GNU General Public License as published 7 under the terms of the GNU General Public License as published
120 namespace when running an application in a Terminal Server 120 namespace when running an application in a Terminal Server
121 session. This causes failure since, by default, applications 121 session. This causes failure since, by default, applications
122 don't get SeCreateGlobalPrivilege. We don't need global 122 don't get SeCreateGlobalPrivilege. We don't need global
123 memory sharing so explicitly put object into Local namespace. 123 memory sharing so explicitly put object into Local namespace.
124 124
125 There is also another issue, which appears if multiple concurrent 125 If multiple concurrent GCC processes are using PCH functionality,
126 GCC processes are using PCH functionality. MapViewOfFileEx returns 126 MapViewOfFileEx returns "Access Denied" error. So we ensure the
127 "Access Denied" error. So we need to make the session-wide mapping 127 session-wide mapping name is unique by appending process ID. */
128 name unique. Let's use current process ID for that. */ 128
129 #define OBJECT_NAME_FMT "Local\\MinGWGCCPCH-" 129 #define OBJECT_NAME_FMT "Local\\MinGWGCCPCH-"
130 130
131 /* Allocate enough space for name prefix and max possible DWORD 131 char* object_name = NULL;
132 hexadecimal representation. */
133 char object_name[sizeof (OBJECT_NAME_FMT) + sizeof (DWORD) * 2];
134 snprintf (object_name, sizeof (object_name), OBJECT_NAME_FMT "%lx",
135 GetCurrentProcessId());
136
137 /* However, the documentation for CreateFileMapping says that on NT4 132 /* However, the documentation for CreateFileMapping says that on NT4
138 and earlier, backslashes are invalid in object name. So, we need 133 and earlier, backslashes are invalid in object name. So, we need
139 to check if we are on Windows2000 or higher. */ 134 to check if we are on Windows2000 or higher. */
140 OSVERSIONINFO version_info; 135 OSVERSIONINFO version_info;
141 136 version_info.dwOSVersionInfoSize = sizeof (version_info);
137
142 if (size == 0) 138 if (size == 0)
143 return 0; 139 return 0;
144 140
145 /* Offset must be also be a multiple of allocation granularity for 141 /* Offset must be also be a multiple of allocation granularity for
146 this to work. We can't change the offset. */ 142 this to work. We can't change the offset. */
147 if ((offset & (va_granularity - 1)) != 0 || size > pch_VA_max_size) 143 if ((offset & (va_granularity - 1)) != 0 || size > pch_VA_max_size)
148 return -1; 144 return -1;
149 145
150 /* Determine the version of Windows we are running on. */ 146
151 version_info.dwOSVersionInfoSize = sizeof (version_info); 147 /* Determine the version of Windows we are running on and use a
148 uniquely-named local object if running > 4. */
152 GetVersionEx (&version_info); 149 GetVersionEx (&version_info);
153 150 if (version_info.dwMajorVersion > 4)
151 {
152 char local_object_name [sizeof (OBJECT_NAME_FMT)
153 + sizeof (DWORD) * 2];
154 snprintf (local_object_name, sizeof (local_object_name),
155 OBJECT_NAME_FMT "%lx", GetCurrentProcessId());
156 object_name = local_object_name;
157 }
158
154 mmap_handle = CreateFileMappingA ((HANDLE) _get_osfhandle (fd), NULL, 159 mmap_handle = CreateFileMappingA ((HANDLE) _get_osfhandle (fd), NULL,
155 PAGE_WRITECOPY | SEC_COMMIT, 0, 0, 160 PAGE_WRITECOPY | SEC_COMMIT, 0, 0,
156 version_info.dwMajorVersion > 4 161 object_name);
157 ? object_name : NULL); 162
158 if (mmap_handle == NULL) 163 if (mmap_handle == NULL)
159 { 164 {
160 w32_error (__FUNCTION__, __FILE__, __LINE__, "CreateFileMapping"); 165 w32_error (__FUNCTION__, __FILE__, __LINE__, "CreateFileMapping");
161 return -1; 166 return -1;
162 } 167 }