Repository files (latest commit first)

Filename	Latest commit message	Latest commit date
Masami Hiramatsu 0ad45b33c5 perf probe: Skip if the function address is 0 ... Skip probes if the entry address of the target function is 0. This can happen when we're handling C++ debuginfo files. E.g. without this fix, below case still fail. ---- $ ./perf probe -x /usr/lib64/libstdc++.so.6 -vD is_open probe-definition(0): is_open symbol:is_open file:(null) line:0 offset:0 return:0 lazy:(null) 0 arguments symbol:catch file:(null) line:0 offset:0 return:0 lazy:(null) symbol:throw file:(null) line:0 offset:0 return:0 lazy:(null) symbol:rethrow file:(null) line:0 offset:0 return:0 lazy:(null) Open Debuginfo file: /usr/lib/debug/usr/lib64/libstdc++.so.6.0.22.debug Try to find probe point from debuginfo. Matched function: is_open [295df] found inline addr: 0x8ca80 Probe point found: is_open+0 found inline addr: 0x8ca70 Probe point found: is_open+0 found inline addr: 0x8ca60 Probe point found: is_open+0 Matched function: is_open [6527f] Matched function: is_open [9fe8a] Probe point found: is_open+0 Matched function: is_open [19710b] found inline addr: 0xecca9 Probe point found: stdio_filebuf+57 found inline addr: 0x0 Probe point found: swap+0 Matched function: is_open [19fc9d] Probe point found: is_open+0 Found 7 probe_trace_events. 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 Failed to synthesize probe trace event. Error: Failed to add events. Reason: Invalid argument (Code: -22) ---- This is because some instances have entry_pc == 0 (see 19710b and 19fc9d). With this fix, those are skipped. ---- $ ./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 ---- Signed-off-by: Masami Hiramatsu <mhiramat@kernel.org> Tested-by: Arnaldo Carvalho de Melo <acme@redhat.com> Tested-by: Jiri Olsa <jolsa@kernel.org> Cc: David Ahern <dsahern@gmail.com> Cc: Namhyung Kim <namhyung@kernel.org> Cc: Peter Zijlstra <peterz@infradead.org> Cc: Thomas Gleixner <tglx@linutronix.de> Link: http://lkml.kernel.org/r/147464490707.29804.14277897643725143867.stgit@devbox Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>		2016-09-29 11:17:07 -03:00
..
arch	tools include: Add mman macros needed by perf for all arch	2016-09-19 11:30:56 -03:00
build	perf build: Add sdt feature detection	2016-07-13 23:09:09 -03:00
cgroup
firewire
gpio	tools/gpio: fix gpio-event-mon header comment	2016-08-08 09:50:22 +02:00
hv
iio	tools:iio:iio_generic_buffer: fix trigger-less mode	2016-08-29 18:06:21 +01:00
include	tools include: Add uapi mman.h for each architecture	2016-09-13 15:26:08 -03:00
kvm/kvm_stat
laptop/freefall
lguest	tools/lguest: Don't bork the terminal in case of wrong args	2016-09-08 08:05:24 +02:00
lib	tools lib api fs: Add hugetlbfs filesystem detector	2016-09-08 12:34:43 -03:00
net
nfsd
objtool	Merge branch 'core-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip	2016-07-30 11:54:53 -07:00
perf	perf probe: Skip if the function address is 0	2016-09-29 11:17:07 -03:00
power	ACPI material for v4.8-rc1	2016-07-26 17:56:45 -07:00
scripts	tools build: Fix objtool build with ARCH=x86_64	2016-07-22 16:37:44 -03:00
spi
testing	Merge branch 'libnvdimm-fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/nvdimm/nvdimm	2016-08-12 12:28:23 -07:00
thermal/tmon
time
usb
virtio	tools/virtio: add dma stubs	2016-08-15 05:05:51 +03:00
vm	tools/vm/page_owner: increase temporary buffer size	2016-07-26 16:19:19 -07:00
Makefile