linux-kernel - [PATCH v2 0/4] perf probe, tracing/uprobes: Support probing at absolute address

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Date:	Wed, 26 Aug 2015 07:40:21 +0000
From:	Wang Nan <wangnan0@...wei.com>
To:	<acme@...nel.org>, <masami.hiramatsu.pt@...achi.com>,
	<rostedt@...dmis.org>
CC:	<mingo@...hat.com>, <namhyung@...nel.org>, <pi3orama@....com>,
	<linux-kernel@...r.kernel.org>
Subject: [PATCH v2 0/4] perf probe, tracing/uprobes: Support probing at absolute address

The goal of these 4 patches is to allow perf probing at absolute address
for uprobes and kprobes. During the development several small problem in
'perf probe -l' is found and fixed.

Patch 1 has already acked by Masami Hiramatsu.

Patch 2 fixes a problem about zero address in perf side.

Patch 3 is the main patch of these 4. It allows following command:

 # perf probe /lib/x86_64-linux-gnu/libc-2.19.so 0xeb860

 Different from v1, no extra '+' is required.

Patch 4 is a kernel side patch which fixes a small problem in uprobe_event
that, if address is 0, uprobe_events reports '0x  (null)'. It is independent
from the other patches.

Wang Nan (4):
  perf probe: Prevent segfault when reading probe point with absolute
    address
  perf probe: Fix list result when address is zero
  perf probe: Support probing at absolute address
  tracing/uprobes: Do not print '0x  (null)' when offset is 0

 kernel/trace/trace_uprobe.c    |  17 +++-
 tools/perf/util/probe-event.c  | 210 +++++++++++++++++++++++++++++++++++++----
 tools/perf/util/probe-event.h  |   4 +
 tools/perf/util/probe-finder.c |  21 +----
 4 files changed, 216 insertions(+), 36 deletions(-)

-- 
1.8.3.4

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