https://bugs.kde.org/show_bug.cgi?id=523375
Bug ID: 523375
Summary: Fix none/tests/amd64/pcmpxstrx64.c
Classification: Developer tools
Product: valgrind
Version First 3.27 GIT
Reported In:
Platform: Other
OS: Linux
Status: REPORTED
Severity: normal
Priority: NOR
Component: general
Assignee: [email protected]
Reporter: [email protected]
Target Milestone: ---
The pcmpxstrx64 testcase is broken. There's a problem in how blockC is
populated within individual subtests of none/tests/amd64/pcmpxstrx64.c where
both argL and argN are 128 bit long, and so with the following code:
65 UChar* blockC = (UChar*)&block[0];
66
67 /* ---------------- ISTRI_4A ---------------- */
68 memset(blockC, 0x55, 80);
69 memcpy(blockC + 0, &argL, 16);
70 memcpy(blockC + 16, &argR, 16);
71 memcpy(blockC + 24, &rdxIN, 8);
the value of rdxIN partially overwrites argR (as discussed in Bug 521413#c2).
Despite that, the test passes because the expected output was probably
generated with this bug in place.
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