"perf record" has no samples when glibc-debuginfo installed

"perf record" has no samples when glibc-debuginfo installed

[qiu_qiu]

"perf record" has no samples on fedora 27 when installed glibc-debuginfo package


How reproducible:


Steps to Reproduce:
1. debuginfo-install glibc
2. perf probe -x /lib64/libc.so.6 malloc 
3. perf record -e probe_libc:malloc -a ls

Actual results:
[root@localhost ~]# perf record -e probe_libc:malloc -a ls
anaconda-ks.cfg  Documents  Music      perf.data.old  Public	        Videos
Desktop		 Downloads  perf.data  Pictures        Templates
[ perf record: Woken up 0 times to write data ]
[ perf record: Captured and wrote 0.239 MB perf.data ]

Expected results:
[root@localhost ~]# perf record -e probe_libc:malloc -a ls
anaconda-ks.cfg  Documents  Music      perf.data.old  Public	        Videos
Desktop		 Downloads  perf.data  Pictures        Templates
[ perf record: Woken up 0 times to write data ]
[ perf record: Captured and wrote 0.239 MB perf.data (72 samples) ]

Re: "perf record" has no samples when glibc-debuginfo installed

[Florian Weimer]

On 03/29/2018 04:46 AM, qiu_qiu wrote:
> "perf record" has no samples on fedora 27 when installed glibc-debuginfo package
> 
> 
> How reproducible:
> 
> 
> Steps to Reproduce:
> 1. debuginfo-install glibc
> 2. perf probe -x /lib64/libc.so.6 malloc
> 3. perf record -e probe_libc:malloc -a ls

The probes appear to be there:

# stap -r  4.15.12-301.fc27.x86_64  -L 
'process("/lib64/libc.so.6").mark("*")'
process("/usr/lib64/libc-2.26.so").mark("lll_lock_wait_private") $arg1:long
process("/usr/lib64/libc-2.26.so").mark("longjmp") $arg1:long $arg2:long 
$arg3:long
process("/usr/lib64/libc-2.26.so").mark("longjmp_target") $arg1:long 
$arg2:long $arg3:long
process("/usr/lib64/libc-2.26.so").mark("memory_arena_new") $arg1:long 
$arg2:long
process("/usr/lib64/libc-2.26.so").mark("memory_arena_retry") $arg1:long 
$arg2:long
process("/usr/lib64/libc-2.26.so").mark("memory_arena_reuse") $arg1:long 
$arg2:long
process("/usr/lib64/libc-2.26.so").mark("memory_arena_reuse_free_list") 
$arg1:long
process("/usr/lib64/libc-2.26.so").mark("memory_arena_reuse_wait") 
$arg1:long $arg2:long $arg3:long
process("/usr/lib64/libc-2.26.so").mark("memory_calloc_retry") $arg1:long
process("/usr/lib64/libc-2.26.so").mark("memory_heap_free") $arg1:long 
$arg2:long
process("/usr/lib64/libc-2.26.so").mark("memory_heap_less") $arg1:long 
$arg2:long
process("/usr/lib64/libc-2.26.so").mark("memory_heap_more") $arg1:long 
$arg2:long
process("/usr/lib64/libc-2.26.so").mark("memory_heap_new") $arg1:long 
$arg2:long
process("/usr/lib64/libc-2.26.so").mark("memory_malloc_retry") $arg1:long
process("/usr/lib64/libc-2.26.so").mark("memory_mallopt") $arg1:long 
$arg2:long
process("/usr/lib64/libc-2.26.so").mark("memory_mallopt_arena_max") 
$arg1:long $arg2:long
process("/usr/lib64/libc-2.26.so").mark("memory_mallopt_arena_test") 
$arg1:long $arg2:long
process("/usr/lib64/libc-2.26.so").mark("memory_mallopt_free_dyn_thresholds") 
$arg1:long $arg2:long
process("/usr/lib64/libc-2.26.so").mark("memory_mallopt_mmap_max") 
$arg1:long $arg2:long $arg3:long
process("/usr/lib64/libc-2.26.so").mark("memory_mallopt_mmap_threshold") 
$arg1:long $arg2:long $arg3:long
process("/usr/lib64/libc-2.26.so").mark("memory_mallopt_mxfast") 
$arg1:long $arg2:long
process("/usr/lib64/libc-2.26.so").mark("memory_mallopt_perturb") 
$arg1:long $arg2:long
process("/usr/lib64/libc-2.26.so").mark("memory_mallopt_top_pad") 
$arg1:long $arg2:long $arg3:long
process("/usr/lib64/libc-2.26.so").mark("memory_mallopt_trim_threshold") 
$arg1:long $arg2:long $arg3:long
process("/usr/lib64/libc-2.26.so").mark("memory_memalign_retry") 
$arg1:long $arg2:long
process("/usr/lib64/libc-2.26.so").mark("memory_realloc_retry") 
$arg1:long $arg2:long
process("/usr/lib64/libc-2.26.so").mark("memory_sbrk_less") $arg1:long 
$arg2:long
process("/usr/lib64/libc-2.26.so").mark("memory_sbrk_more") $arg1:long 
$arg2:long
process("/usr/lib64/libc-2.26.so").mark("memory_tunable_tcache_count") 
$arg1:long $arg2:long
process("/usr/lib64/libc-2.26.so").mark("memory_tunable_tcache_max_bytes") 
$arg1:long $arg2:long
process("/usr/lib64/libc-2.26.so").mark("memory_tunable_tcache_unsorted_limit") 
$arg1:long $arg2:long
process("/usr/lib64/libc-2.26.so").mark("setjmp") $arg1:long $arg2:long 
$arg3:long

But they use "memory", not "malloc" for some reason.

Thanks,
Florian