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* win32-nat.c (set_process_privilege): New function.

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(child_attach): Call set_process_privilege() to enable the
	SE_DEBUG_NAME user privilege if available in process token.
This commit is contained in:
Corinna Vinschen 2003-01-10 20:14:02 +00:00
parent 3269bcfa1c
commit 616a9dc4c0
3 changed files with 172 additions and 0 deletions
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6
gdb/ChangeLog
View File

@ -1,3 +1,9 @@
2003-01-07 Corinna Vinschen <vinschen@redhat.com>
* win32-nat.c (set_process_privilege): New function.
(child_attach): Call set_process_privilege() to enable the
SE_DEBUG_NAME user privilege if available in process token.
2003-01-10 J. Brobecker <brobecker@gnat.com>
* hpread.c (hpread_process_one_debug_symbol): Fix a small

83
gdb/win32-nat.c
View File

@ -1374,6 +1374,83 @@ has_detach_ability (void)
return 0;
}
/* Try to set or remove a user privilege to the current process. Return -1
if that fails, the previous setting of that privilege otherwise.
This code is copied from the Cygwin source code and rearranged to allow
dynamically loading of the needed symbols from advapi32 which is only
available on NT/2K/XP. */
static int
set_process_privilege (const char *privilege, BOOL enable)
{
static HMODULE advapi32 = NULL;
static BOOL WINAPI (*OpenProcessToken)(HANDLE, DWORD, PHANDLE);
static BOOL WINAPI (*LookupPrivilegeValue)(LPCSTR, LPCSTR, PLUID);
static BOOL WINAPI (*AdjustTokenPrivileges)(HANDLE, BOOL, PTOKEN_PRIVILEGES,
DWORD, PTOKEN_PRIVILEGES, PDWORD);
HANDLE token_hdl = NULL;
LUID restore_priv;
TOKEN_PRIVILEGES new_priv, orig_priv;
int ret = -1;
DWORD size;
if (GetVersion () >= 0x80000000) /* No security availbale on 9x/Me */
return 0;
if (!advapi32)
{
if (!(advapi32 = LoadLibrary ("advapi32.dll")))
goto out;
if (!OpenProcessToken)
OpenProcessToken = GetProcAddress (advapi32, "OpenProcessToken");
if (!LookupPrivilegeValue)
LookupPrivilegeValue = GetProcAddress (advapi32,
"LookupPrivilegeValueA");
if (!AdjustTokenPrivileges)
AdjustTokenPrivileges = GetProcAddress (advapi32,
"AdjustTokenPrivileges");
if (!OpenProcessToken || !LookupPrivilegeValue || !AdjustTokenPrivileges)
{
advapi32 = NULL;
goto out;
}
}
if (!OpenProcessToken (GetCurrentProcess (),
TOKEN_QUERY | TOKEN_ADJUST_PRIVILEGES,
&token_hdl))
goto out;
if (!LookupPrivilegeValue (NULL, privilege, &restore_priv))
goto out;
new_priv.PrivilegeCount = 1;
new_priv.Privileges[0].Luid = restore_priv;
new_priv.Privileges[0].Attributes = enable ? SE_PRIVILEGE_ENABLED : 0;
if (!AdjustTokenPrivileges (token_hdl, FALSE, &new_priv,
sizeof orig_priv, &orig_priv, &size))
goto out;
#if 0
/* Disabled, otherwise every `attach' in an unprivileged user session
would raise the "Failed to get SE_DEBUG_NAME privilege" warning in
child_attach(). */
/* AdjustTokenPrivileges returns TRUE even if the privilege could not
be enabled. GetLastError () returns an correct error code, though. */
if (enable && GetLastError () == ERROR_NOT_ALL_ASSIGNED)
goto out;
#endif
ret = orig_priv.Privileges[0].Attributes == SE_PRIVILEGE_ENABLED ? 1 : 0;
out:
if (token_hdl)
CloseHandle (token_hdl);
return ret;
}
/* Attach to process PID, then initialize for debugging it. */
static void
child_attach (char *args, int from_tty)
@ -1384,6 +1461,12 @@ child_attach (char *args, int from_tty)
if (!args)
error_no_arg ("process-id to attach");
if (set_process_privilege (SE_DEBUG_NAME, TRUE) < 0)
{
printf_unfiltered ("Warning: Failed to get SE_DEBUG_NAME privilege\n");
printf_unfiltered ("This can cause attach to fail on Windows NT/2K/XP\n");
}
pid = strtoul (args, 0, 0);
ok = DebugActiveProcess (pid);
saw_create = 0;

83
gdb/windows-nat.c
View File

@ -1374,6 +1374,83 @@ has_detach_ability (void)
return 0;
}
/* Try to set or remove a user privilege to the current process. Return -1
if that fails, the previous setting of that privilege otherwise.
This code is copied from the Cygwin source code and rearranged to allow
dynamically loading of the needed symbols from advapi32 which is only
available on NT/2K/XP. */
static int
set_process_privilege (const char *privilege, BOOL enable)
{
static HMODULE advapi32 = NULL;
static BOOL WINAPI (*OpenProcessToken)(HANDLE, DWORD, PHANDLE);
static BOOL WINAPI (*LookupPrivilegeValue)(LPCSTR, LPCSTR, PLUID);
static BOOL WINAPI (*AdjustTokenPrivileges)(HANDLE, BOOL, PTOKEN_PRIVILEGES,
DWORD, PTOKEN_PRIVILEGES, PDWORD);
HANDLE token_hdl = NULL;
LUID restore_priv;
TOKEN_PRIVILEGES new_priv, orig_priv;
int ret = -1;
DWORD size;
if (GetVersion () >= 0x80000000) /* No security availbale on 9x/Me */
return 0;
if (!advapi32)
{
if (!(advapi32 = LoadLibrary ("advapi32.dll")))
goto out;
if (!OpenProcessToken)
OpenProcessToken = GetProcAddress (advapi32, "OpenProcessToken");
if (!LookupPrivilegeValue)
LookupPrivilegeValue = GetProcAddress (advapi32,
"LookupPrivilegeValueA");
if (!AdjustTokenPrivileges)
AdjustTokenPrivileges = GetProcAddress (advapi32,
"AdjustTokenPrivileges");
if (!OpenProcessToken || !LookupPrivilegeValue || !AdjustTokenPrivileges)
{
advapi32 = NULL;
goto out;
}
}
if (!OpenProcessToken (GetCurrentProcess (),
TOKEN_QUERY | TOKEN_ADJUST_PRIVILEGES,
&token_hdl))
goto out;
if (!LookupPrivilegeValue (NULL, privilege, &restore_priv))
goto out;
new_priv.PrivilegeCount = 1;
new_priv.Privileges[0].Luid = restore_priv;
new_priv.Privileges[0].Attributes = enable ? SE_PRIVILEGE_ENABLED : 0;
if (!AdjustTokenPrivileges (token_hdl, FALSE, &new_priv,
sizeof orig_priv, &orig_priv, &size))
goto out;
#if 0
/* Disabled, otherwise every `attach' in an unprivileged user session
would raise the "Failed to get SE_DEBUG_NAME privilege" warning in
child_attach(). */
/* AdjustTokenPrivileges returns TRUE even if the privilege could not
be enabled. GetLastError () returns an correct error code, though. */
if (enable && GetLastError () == ERROR_NOT_ALL_ASSIGNED)
goto out;
#endif
ret = orig_priv.Privileges[0].Attributes == SE_PRIVILEGE_ENABLED ? 1 : 0;
out:
if (token_hdl)
CloseHandle (token_hdl);
return ret;
}
/* Attach to process PID, then initialize for debugging it. */
static void
child_attach (char *args, int from_tty)
@ -1384,6 +1461,12 @@ child_attach (char *args, int from_tty)
if (!args)
error_no_arg ("process-id to attach");
if (set_process_privilege (SE_DEBUG_NAME, TRUE) < 0)
{
printf_unfiltered ("Warning: Failed to get SE_DEBUG_NAME privilege\n");
printf_unfiltered ("This can cause attach to fail on Windows NT/2K/XP\n");
}
pid = strtoul (args, 0, 0);
ok = DebugActiveProcess (pid);
saw_create = 0;