[Bug 48052] New: kernel32:debugger - Wine randomly fails to get the thread context

[WineHQ Bugzilla]

https://bugs.winehq.org/show_bug.cgi?id=48052

            Bug ID: 48052
           Summary: kernel32:debugger - Wine randomly fails to get the
                    thread context
           Product: Wine
           Version: unspecified
          Hardware: x86
                OS: Linux
            Status: NEW
          Severity: normal
          Priority: P2
         Component: kernel32
          Assignee: wine-bugs at winehq.org
          Reporter: fgouget at codeweavers.com
      Distribution: ---

The kernel32:debugger test randomly fails with a variable number of these
failures:

debugger.c:320: Test failed: GetThreadContext failed: 5
debugger.c:320: Test failed: GetThreadContext failed: 5
debugger.c:320: Test failed: GetThreadContext failed: 5
debugger.c:320: Test failed: GetThreadContext failed: 5

See https://test.winehq.org/data/tests/kernel32:debugger.html

These happen in test_debugger(), when fetch_process_context() tries to get the
context of each thread. In Wine GetThreadContext() randomly fails causing a
variable number of the above messages depending on how many threads are
impacted.

All three Wine builds are impacted. The ERROR_ACCESS_DENIED probably comes from
get_handle_obj() in server/handle.c. Given that this test was added to test a
Wine exception handling race (*), maybe the race is still present?

(*) Based on the commit message for:
commit 42a9b58b066ff374148cee088ac57cfba46e3b76
Author:     Jacek Caban <jacek at codeweavers.com>
AuthorDate: Mon Aug 26 19:37:20 2019 +0200

    kernel32/tests: Add exception handling race test.

    Signed-off-by: Jacek Caban <jacek at codeweavers.com>
    Signed-off-by: Alexandre Julliard <julliard at winehq.org>


The tests were later enabled on Wine by:

commit 27da4fa4498c3b6e0e46c72a9cdd13b620726e92
Author:     Jacek Caban <jacek at codeweavers.com>
AuthorDate: Fri Sep 20 16:33:53 2019 +0200

    kernel32/tests: Enable debug break exception race tests on i386 Wine.

    Signed-off-by: Jacek Caban <jacek at codeweavers.com>
    Signed-off-by: Alexandre Julliard <julliard at winehq.org>

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