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From: "hjl.tools at gmail dot com" <sourceware-bugzilla@sourceware.org>
To: glibc-bugs@sourceware.org
Subject: [Bug libc/26203] New: GLRO(dl_x86_cpu_features) may not be intialized
Date: Sat, 04 Jul 2020 12:32:50 +0000
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https://sourceware.org/bugzilla/show_bug.cgi?id=3D26203

            Bug ID: 26203
           Summary: GLRO(dl_x86_cpu_features) may not be intialized
           Product: glibc
           Version: 2.32
            Status: NEW
          Severity: normal
          Priority: P2
         Component: libc
          Assignee: unassigned at sourceware dot org
          Reporter: hjl.tools at gmail dot com
                CC: drepper.fsp at gmail dot com
  Target Milestone: ---
            Target: i386, x86-64

This patch:

diff --git a/sysdeps/x86/cacheinfo.c b/sysdeps/x86/cacheinfo.c
index 311502dee3..3ddc7104f4 100644
--- a/sysdeps/x86/cacheinfo.c
+++ b/sysdeps/x86/cacheinfo.c
@@ -769,6 +769,8 @@ init_cacheinfo (void)
   unsigned int threads =3D 0;
   const struct cpu_features *cpu_features =3D __get_cpu_features ();

+  assert (cpu_features->basic.kind !=3D arch_kind_unknown);
+
   if (cpu_features->basic.kind =3D=3D arch_kind_intel)
     {
       data =3D handle_intel (_SC_LEVEL1_DCACHE_SIZE, cpu_features);

caused:

FAIL: elf/tst-libc_dlvsym-static

GLRO(dl_x86_cpu_features) in ld.so is initialized by init_cpu_features, whi=
ch
is invoked by DL_PLATFORM_INIT from _dl_sysdep_start.  But ld.so loaded by
static executable never calls _dl_sysdep_start.

--=20
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