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From: Ingo Molnar on 17 Mar 2010 06:40

* Masami Hiramatsu <mhiramat(a)redhat.com> wrote:

> Hi Ingo,
>
> Here are several updates of perf-probe.
> This updates includes data structure accessing support
> --list option enhancement and --dry-run option support.
>
> - --dry-run allows users to run perf-probe just for checking
> that the command works correctly.
>
> - --list option enhancement allows user to check where the
> probes are put on (with filename/line number).
>
> - data structure accessing support allows user to trace
> the contents of local variables/function parameters.

Very nice! I think tracing a data structure value at a given point in the
source will be a rather popular feature.

> Long-term TODOs (future features):
> - Enhance probe-finder to decode call frame instructions.
> - Support tracing static variables (non global)
> - Support variable basic types from debuginfo (e.g. char, int, ...)
> - Support array element (var[N])
> - Support string/dynamic arrays (*var, var[N..M])
> - Support the type of return value
> - Support force type-casting ((type)var)
> - Support sys_perf_counter_open (for non-root users)
> - Support dynamic array-indexing (var[var2])
>
> Miscs:
> - Better support for probes on modules
> - More debugger like enhancements(%next, --disasm, etc.)

Sounds good :-)

> Masami Hiramatsu (10):
> perf probe: Accessing members in data structures
> perf probe: List probes with line number and file name
> perf probe: Introduce kprobe_trace_event and perf_probe_event
> perf probe: Add --dry-run option
> perf probe: Introduce die_find_child() function
> perf probe: Rename some die_get_* functions
> perf probe: Rename session to param
> perf probe: Move add-probe routine under util/
> perf probe: Use wrapper functions
> perf tools: Introduce xzalloc() for detecting out of memory
>
>
> tools/perf/Documentation/perf-probe.txt | 5
> tools/perf/builtin-probe.c | 191 +------
> tools/perf/util/probe-event.c | 830 +++++++++++++++++++++++--------
> tools/perf/util/probe-event.h | 123 ++++-
> tools/perf/util/probe-finder.c | 459 ++++++++++++-----
> tools/perf/util/probe-finder.h | 60 +-
> tools/perf/util/util.h | 7
> 7 files changed, 1115 insertions(+), 560 deletions(-)

Applied, thanks!

Ingo
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