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host-mingw32.c (mingw32_gt_pch_use_address): Make object_name unique for each process.

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2009-04-01  Kai Tietz  <kai.tietz@onevision.com>
            Andrey Galkin <agalkin@hypercom.com>

        PR/39492
        * config/i386/host-mingw32.c (mingw32_gt_pch_use_address):
        Make object_name unique for each process.


Co-Authored-By: Andrey Galkin <agalkin@hypercom.com>

From-SVN: r145394
This commit is contained in:
Kai Tietz 2009-04-01 09:05:13 +00:00 committed by Kai Tietz
parent 03742a9b01
commit 73d21f56d1
2 changed files with 20 additions and 2 deletions
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gcc/ChangeLog
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@ -1,3 +1,10 @@
2009-04-01 Kai Tietz <kai.tietz@onevision.com>
Andrey Galkin <agalkin@hypercom.com>
PR/39492
* config/i386/host-mingw32.c (mingw32_gt_pch_use_address):
Make object_name unique for each process.
2009-04-01 Jakub Jelinek <jakub@redhat.com>
PR other/39591

15
gcc/config/i386/host-mingw32.c
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@ -120,8 +120,19 @@ mingw32_gt_pch_use_address (void *addr, size_t size, int fd,
namespace when running an application in a Terminal Server
session. This causes failure since, by default, applications
don't get SeCreateGlobalPrivilege. We don't need global
memory sharing so explicitly put object into Local namespace. */
const char object_name[] = "Local\\MinGWGCCPCH";
memory sharing so explicitly put object into Local namespace.
There is also another issue, which appears if multiple concurrent
GCC processes are using PCH functionality. MapViewOfFileEx returns
"Access Denied" error. So we need to make the session-wide mapping
name unique. Let's use current process ID for that. */
#define OBJECT_NAME_FMT "Local\\MinGWGCCPCH-"
/* Allocate enough space for name prefix and max possible DWORD
hexadecimal representation. */
char object_name[sizeof (OBJECT_NAME_FMT) + sizeof (DWORD) * 2];
snprintf (object_name, sizeof (object_name), OBJECT_NAME_FMT "%lx",
GetCurrentProcessId());
/* However, the documentation for CreateFileMapping says that on NT4
and earlier, backslashes are invalid in object name. So, we need