tracing: probeevent: Add array type support

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Add array type support for probe events.
This allows user to get arraied types from memory address.
The array type syntax is

	TYPE[N]

Where TYPE is one of types (u8/16/32/64,s8/16/32/64,
x8/16/32/64, symbol, string) and N is a fixed value less
than 64.

The string array type is a bit different from other types. For
other base types, <base-type>[1] is equal to <base-type>
(e.g. +0(%di):x32[1] is same as +0(%di):x32.) But string[1] is not
equal to string. The string type itself represents "char array",
but string array type represents "char * array". So, for example,
+0(%di):string[1] is equal to +0(+0(%di)):string.

Link: http://lkml.kernel.org/r/152465891533.26224.6150658225601339931.stgit@devbox

Signed-off-by: Masami Hiramatsu <mhiramat@kernel.org>
Signed-off-by: Steven Rostedt (VMware) <rostedt@goodmis.org>

...

This commit is contained in:

Masami Hiramatsu 2018-04-25 21:21:55 +09:00 • committed by Steven Rostedt (VMware)

parent 60c2e0cebf

commit 40b53b7718

5 changed files with 181 additions and 40 deletions

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11

Documentation/trace/kprobetrace.rst

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3

kernel/trace/trace.c

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128

kernel/trace/trace_probe.c

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14

kernel/trace/trace_probe.h

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63

kernel/trace/trace_probe_tmpl.h

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