From 4df1fa6ddc8925a75f3da644d5da3bb16eb33f02 Mon Sep 17 00:00:00 2001 From: Noah Goldstein Date: Fri, 3 Dec 2021 15:29:25 -0800 Subject: x86-64: Use notl in EVEX strcmp [BZ #28646] Must use notl %edi here as lower bits are for CHAR comparisons potentially out of range thus can be 0 without indicating mismatch. This fixes BZ #28646. Co-Authored-By: H.J. Lu --- string/test-strcmp.c | 28 ++++++++++++++++++++++++++++ 1 file changed, 28 insertions(+) (limited to 'string/test-strcmp.c') diff --git a/string/test-strcmp.c b/string/test-strcmp.c index 77ae731..42178a2 100644 --- a/string/test-strcmp.c +++ b/string/test-strcmp.c @@ -23,6 +23,7 @@ # define TEST_NAME "strcmp" #endif #include "test-string.h" +#include #ifdef WIDE # include @@ -390,6 +391,32 @@ check2 (void) } } +static void +check3 (void) +{ + size_t size = 0xd000 + 0x4000; + CHAR *s1, *s2; + CHAR *buffer1 = mmap (NULL, size, PROT_READ | PROT_WRITE, + MAP_PRIVATE | MAP_ANON, -1, 0); + CHAR *buffer2 = mmap (NULL, size, PROT_READ | PROT_WRITE, + MAP_PRIVATE | MAP_ANON, -1, 0); + if (buffer1 == MAP_FAILED || buffer1 == MAP_FAILED) + error (EXIT_UNSUPPORTED, errno, "mmap failed"); + + s1 = (CHAR *) (buffer1 + 0x8f8 / sizeof (CHAR)); + s2 = (CHAR *) (buffer2 + 0xcff3 / sizeof (CHAR)); + + STRCPY(s1, L("/export/redhat/rpms/BUILD/java-1.8.0-openjdk-1.8.0.312.b07-2.fc35.x86_64/openjdk/langtools/src/share/classes/com/sun/tools/doclets/internal/toolkit/util/PathDocFileFactory.java")); + STRCPY(s2, L("/export/redhat/rpms/BUILD/java-1.8.0-openjdk-1.8.0.312.b07-2.fc35.x86_64/openjdk/langtools/src/share/classes/com/sun/tools/doclets/internal/toolkit/taglets/ThrowsTaglet.java")); + + int exp_result = SIMPLE_STRCMP (s1, s2); + FOR_EACH_IMPL (impl, 0) + check_result (impl, s1, s2, exp_result); + + munmap ((void *) buffer1, size); + munmap ((void *) buffer2, size); +} + int test_main (void) { @@ -398,6 +425,7 @@ test_main (void) test_init (); check(); check2 (); + check3 (); printf ("%23s", ""); FOR_EACH_IMPL (impl, 0) -- cgit v1.1