Description zhixin01 2024-04-23 16:41:10 UTC

[缺陷描述]：
bcc：test_usdt，在启动usdt探针时失败，报错：bcc.usdt.USDTException: Failed to enable USDT probe 'probe_point_1'

test_usdt2.py和test_usdt3.py用例也是同样的失败

失败日志如下：
# python test_usdt.py
<stdin>:23:17: warning: null character(s) preserved in literal
<stdin>:28:17: warning: null character(s) preserved in literal
Parse error:
    8@x0 8@[x2, #:lo12:.LANCHOR2]
----------------^
Parse error:
    8@x0 8@[x2, #:lo12:.LANCHOR2]
----------------^
Parse error:
    8@x20 8@[x23, #:lo12:.LANCHOR2]
------------------^
Parse error:
    8@x20 8@[x23, #:lo12:.LANCHOR2]
------------------^
E
======================================================================
ERROR: test_attach1 (__main__.TestUDST)
----------------------------------------------------------------------
Traceback (most recent call last):
  File "/tmp/tone/run/bcc/tests/python/test_usdt.py", line 145, in test_attach1
    u.enable_probe(probe="probe_point_1", fn_name="do_trace1")
  File "/usr/lib/python3.10/site-packages/bcc/usdt.py", line 161, in enable_probe
    raise USDTException(
bcc.usdt.USDTException: Failed to enable USDT probe 'probe_point_1':
the specified pid might not contain the given language's runtime,
or the runtime was not built with the required USDT probes. Look
for a configure flag similar to --with-dtrace or --enable-dtrace.
To check which probes are present in the process, use the tplist tool.


----------------------------------------------------------------------
Ran 1 test in 0.036s

FAILED (errors=1)


[复现概率]：
必现

[复现环境]：
内核：
# uname -r
6.6.25-2_rc1.an23.x86_64

# cat /etc/os-release
NAME="Anolis OS"
VERSION="23"
ID="anolis"
VERSION_ID="23"
PLATFORM_ID="platform:an23"
PRETTY_NAME="Anolis OS 23"
ANSI_COLOR="0;31"
HOME_URL="https://openanolis.cn/"
BUG_REPORT_URL="https://bugzilla.openanolis.cn/"

CPU信息：
# lscpu
Architecture:             x86_64
  CPU op-mode(s):         32-bit, 64-bit
  Address sizes:          52 bits physical, 57 bits virtual
  Byte Order:             Little Endian
CPU(s):                   4
  On-line CPU(s) list:    0-3
Vendor ID:                GenuineIntel
  BIOS Vendor ID:         Alibaba Cloud
  Model name:             Intel(R) Xeon(R) Platinum 8475B
    BIOS Model name:      pc-q35-df-2.1  CPU @ 0.0GHz
    BIOS CPU family:      1
    CPU family:           6
    Model:                143
    Thread(s) per core:   2
    Core(s) per socket:   2
    Socket(s):            1
    Stepping:             8
    CPU(s) scaling MHz:   84%
    CPU max MHz:          3800.0000
    CPU min MHz:          800.0000
    BogoMIPS:             5400.00
    Flags:                fpu vme de pse tsc msr pae mce cx8 apic sep mtrr pge mca cmov pat pse36 clflush mmx fxsr sse sse2 ss ht syscall nx pdpe1gb rdtsc
                          p lm constant_tsc rep_good nopl xtopology nonstop_tsc cpuid aperfmperf tsc_known_freq pni pclmulqdq monitor ssse3 fma cx16 pdcm
                          pcid sse4_1 sse4_2 x2apic movbe popcnt aes xsave avx f16c rdrand hypervisor lahf_lm abm 3dnowprefetch cpuid_fault ibrs_enhanced
                          fsgsbase tsc_adjust bmi1 hle avx2 smep bmi2 erms invpcid rtm avx512f avx512dq rdseed adx smap avx512ifma clflushopt clwb avx512c
                          d sha_ni avx512bw avx512vl xsaveopt xsavec xgetbv1 xsaves avx_vnni avx512_bf16 wbnoinvd ida arat hwp hwp_notify hwp_act_window h
                          wp_epp hwp_pkg_req avx512vbmi umip pku ospke waitpkg avx512_vbmi2 gfni vaes vpclmulqdq avx512_vnni avx512_bitalg avx512_vpopcntd
                          q rdpid bus_lock_detect cldemote movdiri movdir64b enqcmd fsrm md_clear serialize tsxldtrk amx_bf16 avx512_fp16 amx_tile amx_int
                          8 arch_capabilities
Virtualization features:
  Hypervisor vendor:      KVM
  Virtualization type:    full
Caches (sum of all):
  L1d:                    96 KiB (2 instances)
  L1i:                    64 KiB (2 instances)
  L2:                     4 MiB (2 instances)
  L3:                     97.5 MiB (1 instance)
NUMA:
  NUMA node(s):           1
  NUMA node0 CPU(s):      0-3
Vulnerabilities:
  Gather data sampling:   Not affected
  Itlb multihit:          Not affected
  L1tf:                   Not affected
  Mds:                    Not affected
  Meltdown:               Not affected
  Mmio stale data:        Unknown: No mitigations
  Reg file data sampling: Not affected
  Retbleed:               Not affected
  Spec rstack overflow:   Not affected
  Spec store bypass:      Vulnerable
  Spectre v1:             Mitigation; usercopy/swapgs barriers and __user pointer sanitization
  Spectre v2:             Mitigation; Enhanced / Automatic IBRS, RSB filling, PBRSB-eIBRS SW sequence
  Srbds:                  Not affected
  Tsx async abort:        Not affected

内存信息：
# free -h
               total        used        free      shared  buff/cache   available
Mem:            15Gi       585Mi       6.9Gi       364Mi       7.6Gi        13Gi
Swap:             0B          0B          0B


[复现步骤]：
yum install bcc-tools yum-utils rpm-build python3-pyroute2.noarch
git clone https://gitee.com/src-anolis-os/bcc.git --branch a23
cd bcc
yum-builddep -y bcc.spec
rpmbuild -D "_topdir $(pwd)" \
        -D "_sourcedir $(pwd)" \
        -D "_builddir $(pwd)" \
        -bp bcc.spec
cd bcc-0.27.0/tests/python
python test_usdt.py

[预期结果]：
用例执行成功

[实际结果]：
用例执行失败，Failed to enable USDT probe 'probe_point_1'