Linux kernel mirror (for testing)
git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
kernel
os
linux
tracing: Add __string_len() example
There's no example code that uses __string_len(), and since the sample
code is used for testing the event logic, add a use case.
Link: https://lore.kernel.org/linux-trace-kernel/20240223152827.5f9f78e2@gandalf.local.home
Cc: Masami Hiramatsu <mhiramat@kernel.org>
Cc: Mathieu Desnoyers <mathieu.desnoyers@efficios.com>
Signed-off-by: Steven Rostedt (Google) <rostedt@goodmis.org>
+5
-2
+5
-2
samples/trace_events/trace-events-sample.h
+5
-2
samples/trace_events/trace-events-sample.h
···
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__bitmask( cpus, num_possible_cpus() )
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__cpumask( cpum )
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__vstring( vstr, fmt, va )
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+
__string_len( lstr, foo, bar / 2 < strlen(foo) ? bar / 2 : strlen(foo) )
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),
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TP_fast_assign(
···
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memcpy(__get_dynamic_array(list), lst,
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__length_of(lst) * sizeof(int));
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__assign_str(str, string);
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+
__assign_str(lstr, foo);
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__assign_vstr(vstr, fmt, va);
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__assign_bitmask(cpus, cpumask_bits(mask), num_possible_cpus());
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__assign_cpumask(cpum, cpumask_bits(mask));
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),
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-
TP_printk("foo %s %d %s %s %s %s (%s) (%s) %s", __entry->foo, __entry->bar,
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TP_printk("foo %s %d %s %s %s %s %s (%s) (%s) %s", __entry->foo, __entry->bar,
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/*
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* Notice here the use of some helper functions. This includes:
···
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__print_array(__get_dynamic_array(list),
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__get_dynamic_array_len(list) / sizeof(int),
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sizeof(int)),
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-
__get_str(str), __get_bitmask(cpus), __get_cpumask(cpum),
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+
__get_str(str), __get_str(lstr),
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+
__get_bitmask(cpus), __get_cpumask(cpum),
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__get_str(vstr))
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);
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