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| author | caiyinyu <caiyinyu@loongson.cn> | 2023-02-28 16:21:41 +0800 |
|---|---|---|
| committer | caiyinyu <caiyinyu@loongson.cn> | 2023-03-07 21:42:25 +0800 |
| commit | 4c721f24fc190d1dc935eb0bab283de7cf13182e (patch) | |
| tree | af08773b43e547d8e518a1967a5bf4dd10d04e37 /sysdeps/x86 | |
| parent | 436a604b7dc741fc76b5a6704c6cd8bb178518e7 (diff) | |
| download | glibc-4c721f24fc190d1dc935eb0bab283de7cf13182e.zip glibc-4c721f24fc190d1dc935eb0bab283de7cf13182e.tar.gz glibc-4c721f24fc190d1dc935eb0bab283de7cf13182e.tar.bz2 | |
x86: Fix bug about glibc.cpu.hwcaps.
Recorded in [BZ #30183]:
1. export GLIBC_TUNABLES=glibc.cpu.hwcaps=-AVX512
2. Add _dl_printf("p -- %s\n", p); just before switch(nl) in
sysdeps/x86/cpu-tunables.c
3. compiled and run ./testrun.sh /usr/bin/ls
you will get:
p -- -AVX512
p -- LC_ADDRESS=en_US.UTF-8
p -- LC_NUMERIC=C
...
The function, TUNABLE_CALLBACK (set_hwcaps)
(tunable_val_t *valp), checks far more than it should and it
should stop at end of "-AVX512".
Diffstat (limited to 'sysdeps/x86')
| -rw-r--r-- | sysdeps/x86/cpu-tunables.c | 6 |
1 files changed, 3 insertions, 3 deletions
diff --git a/sysdeps/x86/cpu-tunables.c b/sysdeps/x86/cpu-tunables.c index d3e1367..772fb0c 100644 --- a/sysdeps/x86/cpu-tunables.c +++ b/sysdeps/x86/cpu-tunables.c @@ -107,13 +107,13 @@ TUNABLE_CALLBACK (set_hwcaps) (tunable_val_t *valp) NOTE: the IFUNC selection may change over time. Please check all multiarch implementations when experimenting. */ - const char *p = valp->strval; + const char *p = valp->strval, *c; struct cpu_features *cpu_features = &GLRO(dl_x86_cpu_features); size_t len; do { - const char *c, *n; + const char *n; bool disable; size_t nl; @@ -283,7 +283,7 @@ TUNABLE_CALLBACK (set_hwcaps) (tunable_val_t *valp) } p += len + 1; } - while (*p != '\0'); + while (*c != '\0'); } # if CET_ENABLED |