Messages in this thread | | | From | Masami Hiramatsu <> | Subject | [PATCH perf/core 0/4] perf-probe fixes for C++ | Date | Sat, 24 Sep 2016 00:34:47 +0900 |
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Hi,
Here is a series of patches for fixing several issues when probing on C++ binaries.
- Ignore inlined function definition if it has no instance [1/4] - Skip (inlined/normal) functions which entry address is 0 [2/4] - Cut off the filename for group name if it includes characters which can not be used for C symbol name [3/4] - Search mangled symbol name from debuginfo [4/4]
So, with this series, perf-probe can handle "mangled symbol" or "method name" as below; ---- $ ./perf probe -x /usr/lib64/libstdc++.so.6 \ -D _ZNKSt15basic_fstreamXXIwSt11char_traitsIwEE7is_openEv p:probe_libstdc/_ZNKSt15basic_fstreamXXIwSt11char_traitsIwEE7is_openEv /usr/lib64/libstdc++.so.6.0.22:0x8ca60
$ ./perf probe -x /usr/lib64/libstdc++.so.6 -D is_open p:probe_libstdc/is_open /usr/lib64/libstdc++.so.6.0.22:0x8ca80 p:probe_libstdc/is_open_1 /usr/lib64/libstdc++.so.6.0.22:0x8ca70 p:probe_libstdc/is_open_2 /usr/lib64/libstdc++.so.6.0.22:0x8ca60 p:probe_libstdc/is_open_3 /usr/lib64/libstdc++.so.6.0.22:0xb0ad0 p:probe_libstdc/is_open_4 /usr/lib64/libstdc++.so.6.0.22:0xecca9 ----
Jiri and Thomas, could you try this if you need it?
TODO: - Support demangled method name(in short), like std::basic_fstream::is_open.
Thank you,
---
Masami Hiramatsu (4): perf-probe: Ignore the error of finding inline instance perf-probe: Skip if the function address is 0 perf-probe: Fix to cut off incompatible chars from group name perf-probe: Match linkage name with mangled name
tools/perf/util/dwarf-aux.c | 28 ++++++++++++++++++++++++++-- tools/perf/util/dwarf-aux.h | 3 +++ tools/perf/util/probe-event.c | 10 +++++++--- tools/perf/util/probe-finder.c | 17 ++++++++++++++--- 4 files changed, 50 insertions(+), 8 deletions(-)
-- Masami Hiramatsu
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