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

From: Wang Nan
Date: Wed Aug 26 2015 - 03:40:53 EST

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
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(-)


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