linux/tools/perf
Masami Hiramatsu f90acac757 perf probe: Find given address from offline dwarf
Find the given address from offline dwarfs instead of online kernel
dwarfs.

On the KASLR enabled kernel, the kernel text section is loaded with
random offset, and the debuginfo__new_online_kernel can't handle it. So
let's move to the offline dwarf loader instead of using the online dwarf
loader.

As a result, since we don't need debuginfo__new_online_kernel any more,
this also removes the functions related to that.

Without this change;

  # ./perf probe -l
    probe:t_show         (on _stext+901288 with m v)
    probe:t_show_1       (on _stext+939624 with m v t)
    probe:t_show_2       (on _stext+980296 with m v fmt)
    probe:t_show_3       (on _stext+1014392 with m v file)

With this change;

  # ./perf probe -l
    probe:t_show         (on t_show@linux-3/kernel/trace/ftrace.c with m v)
    probe:t_show_1       (on t_show@linux-3/kernel/trace/trace.c with m v t)
    probe:t_show_2       (on t_show@kernel/trace/trace_printk.c with m v fmt)
    probe:t_show_3       (on t_show@kernel/trace/trace_events.c with m v file)

Changes from v2:
 - Instead of retrying, directly opens offline dwarf.
 - Remove debuginfo__new_online_kernel and related functions.
 - Refer map->reloc to get the correct address of a symbol.
 - Add a special case for handling ref_reloc_sym based address.

Signed-off-by: Masami Hiramatsu <masami.hiramatsu.pt@hitachi.com>
Cc: David Ahern <dsahern@gmail.com>
Cc: "David A. Long" <dave.long@linaro.org>
Cc: Ingo Molnar <mingo@redhat.com>
Cc: Namhyung Kim <namhyung@kernel.org>
Cc: Oleg Nesterov <oleg@redhat.com>
Cc: Srikar Dronamraju <srikar@linux.vnet.ibm.com>
Cc: Steven Rostedt <rostedt@goodmis.org>
Cc: yrl.pp-manager.tt@hitachi.com
Link: http://lkml.kernel.org/r/20140206053218.29635.74821.stgit@kbuild-fedora.yrl.intra.hitachi.co.jp
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
2014-02-18 09:34:51 -03:00
..
arch perf callchain: Rename unwind__arch_reg_id into libunwind__arch_reg_id 2014-02-18 09:34:48 -03:00
bench perf bench: Fix two warnings 2013-11-01 10:41:54 -03:00
config perf callchain: Introduce HAVE_DWARF_UNWIND_SUPPORT macro 2014-02-18 09:34:48 -03:00
Documentation perf record: Rename --initial-delay to --delay 2014-01-14 17:58:12 -03:00
python perf python: Remove duplicate TID bit from mask 2013-08-07 17:35:25 -03:00
scripts perf tools: Finish the removal of 'self' arguments 2013-11-05 15:32:36 -03:00
tests perf tools: Move fs.* to lib/api/fs/ 2014-02-18 09:34:49 -03:00
ui perf evlist: Introduce evlist__for_each() & friends 2014-01-13 10:06:25 -03:00
util perf probe: Find given address from offline dwarf 2014-02-18 09:34:51 -03:00
.gitignore perf tools: Ignore 'perf timechart' output file 2013-10-11 12:17:37 -03:00
builtin-annotate.c perf evlist: Introduce evlist__for_each() & friends 2014-01-13 10:06:25 -03:00
builtin-bench.c perf bench: Change the procps visible command-name of invididual benchmark tests plus cleanups 2013-10-23 09:57:34 -03:00
builtin-buildid-cache.c perf buildid-cache: Check relocation when checking for existing kcore 2014-01-31 17:21:54 -03:00
builtin-buildid-list.c perf session: Separating data file properties from session 2013-10-21 17:33:25 -03:00
builtin-diff.c perf diff: Color the Weighted Diff column 2014-01-13 11:38:25 -03:00
builtin-evlist.c perf evlist: Introduce evlist__for_each() & friends 2014-01-13 10:06:25 -03:00
builtin-help.c perf help: Fix --help for builtins 2012-10-22 12:35:49 -02:00
builtin-inject.c perf callchain: Add mask into struct regs_dump 2014-02-18 09:34:48 -03:00
builtin-kmem.c perf evsel: Ditch evsel->handler.data field 2013-11-07 10:40:47 -03:00
builtin-kvm.c perf evlist: Introduce evlist__for_each() & friends 2014-01-13 10:06:25 -03:00
builtin-list.c perf list: Add usage 2013-11-05 14:26:41 -03:00
builtin-lock.c perf evsel: Ditch evsel->handler.data field 2013-11-07 10:40:47 -03:00
builtin-mem.c perf mem: Remove unused parameter from dump_raw_samples() 2013-12-19 17:03:39 -03:00
builtin-probe.c perf probe: Replace line_list with intlist 2014-02-18 09:34:50 -03:00
builtin-record.c perf callchain: Introduce HAVE_DWARF_UNWIND_SUPPORT macro 2014-02-18 09:34:48 -03:00
builtin-report.c perf report: Remove some needless container_of usage 2014-02-18 09:34:46 -03:00
builtin-sched.c perf tools: Use zfree to help detect use after free bugs 2013-12-27 17:08:19 -03:00
builtin-script.c perf evlist: Introduce evlist__for_each() & friends 2014-01-13 10:06:25 -03:00
builtin-stat.c perf evlist: Introduce evlist__for_each() & friends 2014-01-13 10:06:25 -03:00
builtin-timechart.c perf timechart: Fix wrong SVG height 2014-01-20 16:19:08 -03:00
builtin-top.c perf tools: Add call-graph option support into .perfconfig 2014-02-18 09:34:47 -03:00
builtin-trace.c perf trace: Fix ioctl 'request' beautifier build problems on !(i386 || x86_64) arches 2014-02-13 17:28:31 -03:00
builtin.h perf tools: Add new mem command for memory access profiling 2013-04-01 12:21:44 -03:00
command-list.txt perf tools: Add new mem command for memory access profiling 2013-04-01 12:21:44 -03:00
CREDITS
design.txt perf/doc: Remove mention of non-existent set_perf_event_pending() from design.txt 2014-01-26 09:37:48 +01:00
Makefile perf tools: Add 'build-test' make target 2014-01-16 16:26:26 -03:00
Makefile.perf perf tools: Drop prefetch.h 2014-02-18 09:34:49 -03:00
MANIFEST perf tools: Move hash.h header 2014-02-18 09:34:49 -03:00
perf-archive.sh perf archive: Make 'f' the last parameter for tar 2012-09-17 13:10:42 -03:00
perf-completion.sh perf completion: Complete 'perf kvm' 2013-12-13 10:30:21 -03:00
perf.c tools/: Convert to new topic libraries 2013-12-16 16:03:27 -03:00
perf.h perf record: Add readable output for callchain debug 2014-02-18 09:34:47 -03:00