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commands/trace: robustify in absence of snapshot support

This commit is contained in:
Philippe Gerum 2019-05-17 13:54:30 +02:00
parent e55d651203
commit c788ed5c6d
1 changed files with 15 additions and 10 deletions
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25
commands/trace.evl
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@ -57,7 +57,7 @@ cd $EVL_TRACEDIR
if test x$enable = xtrue; then
echo nop > current_tracer
echo 0 > snapshot
test -r snapshot && echo 0 > snapshot
echo $bufsz > ${pcpu}buffer_size_kb
if test x$full = xfalse; then
echo 1 > events/irq/enable
@ -66,23 +66,28 @@ if test x$enable = xtrue; then
else
echo function > current_tracer
fi
echo 1 > ${pcpu}snapshot
echo 1 > events/evl/evl_timer_shot/enable
echo \!snapshot > events/evl/evl_trigger/trigger
echo snapshot > events/evl/evl_trigger/trigger
echo 1 > events/evl/evl_trigger/enable
echo 1 > events/evl/evl_latspot/enable
echo "tracing enabled"
warn=
if test -r ${pcpu}snapshot; then
echo 1 > ${pcpu}snapshot
echo \!snapshot > events/evl/evl_trigger/trigger
echo snapshot > events/evl/evl_trigger/trigger
echo 1 > events/evl/evl_timer_shot/enable
echo 1 > events/evl/evl_trigger/enable
echo 1 > events/evl/evl_latspot/enable
else
warn=" (no snapshot)"
fi
echo "tracing enabled$warn"
print=false
elif test x$disable = xtrue; then
echo nop > current_tracer
echo 0 > snapshot
test -r snapshot && echo 0 > snapshot
echo "tracing disabled"
print=false
fi
if test x$print = xtrue; then
cat ${pcpu}snapshot
test -r ${pcpu}snapshot && cat ${pcpu}snapshot || echo "no snapshot."
fi
exit 0