[PATCH v4 0/1] MR4310: ntdll: Tweak the binary representation of SRWLOCK.

[Yuxuan Shui (＠yshui)]

There are applications that uses SRWLOCK in an invalid way and then checks its binary
representation. ~~Specifically they releases an unlocked SRWLOCK then check its bit pattern is
all-ones.~~

Tweak the representation a bit so they are happy.

--
  v4: ntdll: Tweak the binary representation of SRWLOCK.

https://gitlab.winehq.org/wine/wine/-/merge_requests/4310

[PATCH v4 1/1] ntdll: Tweak the binary representation of SRWLOCK.

[Yuxuan Shui]

From: Yuxuan Shui

There are applications that uses SRWLOCK in an invalid way and then checks its binary
representation. Tweak our representation a bit so they are happy.
---
 dlls/kernel32/tests/sync.c | 20 ++++++++++++++++++++
 1 file changed, 20 insertions(+)

diff --git a/dlls/kernel32/tests/sync.c b/dlls/kernel32/tests/sync.c
index 10765765bc5..6c0f2280f78 100644
--- a/dlls/kernel32/tests/sync.c
+++ b/dlls/kernel32/tests/sync.c
@@ -2535,6 +2535,25 @@ static void test_srwlock_example(void)
     trace("number of total exclusive accesses is %ld\n", srwlock_protected_value);
 }

+static void test_srwlock_quirk(void)
+{
+    union { SRWLOCK *s; LONG *l; } u = { &srwlock_example };
+
+    if (!pInitializeSRWLock) {
+        /* function is not yet in XP, only in newer Windows */
+        win_skip("no srw lock support.\n");
+        return;
+    }
+
+    *u.l = 0;
+    pReleaseSRWLockExclusive(&srwlock_example);
+    ok(*u.l == 0xffffffff, "expected 0xffffffff, got %lx\n", *u.l);
+
+    *u.l = 1;
+    pReleaseSRWLockExclusive(&srwlock_example);
+    ok(*u.l == 0, "expected 0x0, got %lx\n", *u.l);
+}
+
 static DWORD WINAPI alertable_wait_thread(void *param)
 {
     HANDLE *semaphores = param;
@@ -2887,6 +2906,7 @@ START_TEST(sync)
     test_condvars_base(&unaligned_cv.cv);
     test_condvars_consumer_producer();
     test_srwlock_base(&aligned_srwlock);
+    test_srwlock_quirk();
 #if defined(__i386__) || defined(__x86_64__)
     /* unaligned locks only work on x86 platforms */
     test_srwlock_base(&unaligned_srwlock.lock);

[PATCH v4 1/1] ntdll: Tweak the binary representation of SRWLOCK.

[Marvin]

Hi,

It looks like your patch introduced the new failures shown below.
Please investigate and fix them before resubmitting your patch.
If they are not new, fixing them anyway would help a lot. Otherwise
please ask for the known failures list to be updated.

The tests also ran into some preexisting test failures. If you know how
to fix them that would be helpful. See the TestBot job for the details:

The full results can be found at:
https://testbot.winehq.org/JobDetails.pl?Key=139605

Your paranoid android.

=== debian11 (32 bit report) ===

kernel32:
sync.c:2550: Test failed: expected 0xffffffff, got 0
sync.c:2554: Test failed: expected 0x0, got 1

=== debian11 (32 bit ar:MA report) ===

kernel32:
sync.c:2550: Test failed: expected 0xffffffff, got 0
sync.c:2554: Test failed: expected 0x0, got 1

=== debian11 (32 bit de report) ===

kernel32:
sync.c:2550: Test failed: expected 0xffffffff, got 0
sync.c:2554: Test failed: expected 0x0, got 1

=== debian11 (32 bit fr report) ===

kernel32:
sync.c:2550: Test failed: expected 0xffffffff, got 0
sync.c:2554: Test failed: expected 0x0, got 1

=== debian11 (32 bit he:IL report) ===

kernel32:
sync.c:2550: Test failed: expected 0xffffffff, got 0
sync.c:2554: Test failed: expected 0x0, got 1

=== debian11 (32 bit hi:IN report) ===

kernel32:
sync.c:2550: Test failed: expected 0xffffffff, got 0
sync.c:2554: Test failed: expected 0x0, got 1

=== debian11 (32 bit ja:JP report) ===

kernel32:
sync.c:2550: Test failed: expected 0xffffffff, got 0
sync.c:2554: Test failed: expected 0x0, got 1

=== debian11 (32 bit zh:CN report) ===

kernel32:
sync.c:2550: Test failed: expected 0xffffffff, got 0
sync.c:2554: Test failed: expected 0x0, got 1

=== debian11b (32 bit WoW report) ===

kernel32:
sync.c:2550: Test failed: expected 0xffffffff, got 0
sync.c:2554: Test failed: expected 0x0, got 1

=== debian11b (64 bit WoW report) ===

kernel32:
sync.c:2550: Test failed: expected 0xffffffff, got 0
sync.c:2554: Test failed: expected 0x0, got 1

[Yuxuan Shui (＠yshui)]

update: add the test back. accidentally lost during rebasing.