From a9f59fc8605de1bcca0b6c2d8132585f40c3b9bc Mon Sep 17 00:00:00 2001
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From: He Zhe <zhe.he@windriver.com>
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Date: Thu, 13 Aug 2020 11:25:58 +0800
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Subject: [PATCH] tools/trace.py: Fix failing to exit
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Class Probe::print_event is used as a callback of a ctypes wrapper. With
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Yocto latest python v3.8.5, the exception raised by exit() is ignored and
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thus trace cannot exit. Use os._exit(0) instead.
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$ /usr/share/bcc/tools/trace do_sys_open -M 1
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PID TID COMM FUNC
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3740 3740 irqbalance do_sys_open
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Exception ignored on calling ctypes callback function:
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<function PerfEventArray.open_perf_buffer.<locals>.raw_cb at 0x7f7c9efea280>
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Traceback (most recent call last):
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File "/usr/lib64/python3.8/site-packages/bcc/table.py", line 685, in raw_cb_
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callback(cpu, data, size)
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File "/usr/share/bcc/tools/trace", line 630, in print_event
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exit()
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File "/usr/lib64/python3.8/sitebuiltins.py", line 26, in __call_
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raise SystemExit(code)
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SystemExit: None
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Upstream-Status: Pending
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Signed-off-by: He Zhe <zhe.he@windriver.com>
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---
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tools/trace.py | 2 +-
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1 file changed, 1 insertion(+), 1 deletion(-)
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diff --git a/tools/trace.py b/tools/trace.py
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index 7a61594f..d09dd2a8 100755
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--- a/tools/trace.py
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+++ b/tools/trace.py
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@@ -627,7 +627,7 @@ BPF_PERF_OUTPUT(%s);
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Probe.event_count += 1
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if Probe.max_events is not None and \
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Probe.event_count >= Probe.max_events:
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- exit()
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+ os._exit(0)
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sys.stdout.flush()
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def attach(self, bpf, verbose):
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--
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2.17.1
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