[PATCH v3 1/5] msxml3/tests: Don't '\0' terminate output after ::save().

[Dmitry Timoshkov]

This fixes heap corruption when running the domdoc tests.

v3: Apparently Windows 8 and later started to \0 terminate buffer in ::save, so
to avoid test failures perform comparisons with memcmp() instead of strcmp().

Signed-off-by: Dmitry Timoshkov 
---
 dlls/msxml3/tests/domdoc.c | 9 +++------
 1 file changed, 3 insertions(+), 6 deletions(-)

diff --git a/dlls/msxml3/tests/domdoc.c b/dlls/msxml3/tests/domdoc.c
index 6f8e2b44ed3..ba8453430c6 100644
--- a/dlls/msxml3/tests/domdoc.c
+++ b/dlls/msxml3/tests/domdoc.c
@@ -8586,8 +8586,7 @@ todo_wine
     hr = GetHGlobalFromStream(stream, &global);
     ok(hr == S_OK, "got 0x%08x\n", hr);
     p = GlobalLock(global);
-    p[GlobalSize(global)] = 0;
-    ok(!strcmp(p, xml2) || !strcmp(p, xml2_wine), "got %s\n", wine_dbgstr_a(p));
+    ok(!memcmp(p, xml2, sizeof(xml2) - 1) || !memcmp(p, xml2_wine, sizeof(xml2_wine) - 1), "got %s\n", wine_dbgstr_a(p));
     GlobalUnlock(global);

/* Verify the result after load+save */
@@ -8609,8 +8608,7 @@ todo_wine
     hr = GetHGlobalFromStream(stream, &global);
     ok(hr == S_OK, "got 0x%08x\n", hr);
     p = GlobalLock(global);
-    p[GlobalSize(global)] = 0;
-    ok(!strcmp(p, xml2) || !strcmp(p, xml2_wine), "got %s\n", wine_dbgstr_a(p));
+    ok(!memcmp(p, xml2, sizeof(xml2) - 1) || !memcmp(p, xml2_wine, sizeof(xml2_wine) - 1), "got %s\n", wine_dbgstr_a(p));
     GlobalUnlock(global);

IStream_Release(stream);
@@ -8631,8 +8629,7 @@ todo_wine
     ok(hr == S_OK, "got 0x%08x\n", hr);

p = GlobalLock(global);
-    p[GlobalSize(global)] = 0;
-    ok(!strcmp(p, xml3) || !strcmp(p, xml3_wine), "got %s\n", wine_dbgstr_a(p));
+    ok(!memcmp(p, xml3, sizeof(xml3) - 1) || !memcmp(p, xml3_wine, sizeof(xml3_wine) - 1), "got %s\n", wine_dbgstr_a(p));
     GlobalUnlock(global);

IStream_Release(stream);

[Nikolay Sivov]

Signed-off-by: Nikolay Sivov

On 4/27/21 12:29 PM, Dmitry Timoshkov wrote:
> This fixes heap corruption when running the domdoc tests.
>
> v3: Apparently Windows 8 and later started to \0 terminate buffer in ::save, so
> to avoid test failures perform comparisons with memcmp() instead of strcmp().

Change is fine, however comment is incorrect I think. On Windows 10,
checking up to HGLOBAL size does not show any nulls.