perf probe: Do not depend on dwfl_module_addrsym()
commit72057ab2923fc9ec90852b8ce60e05b07b513ee8
authorMasami Hiramatsu <mhiramat@kernel.org>
Thu, 27 Feb 2020 15:42:01 +0000 (28 00:42 +0900)
committerGreg Kroah-Hartman <gregkh@linuxfoundation.org>
Thu, 2 Apr 2020 13:28:17 +0000 (2 15:28 +0200)
treed0750f4f742bd0a25de4df38a5cc433ce53c27ec
parent8da3ffaafeb6a16ae8abb02b0fdaff772bc686a1
perf probe: Do not depend on dwfl_module_addrsym()

commit 1efde2754275dbd9d11c6e0132a4f09facf297ab upstream.

Do not depend on dwfl_module_addrsym() because it can fail on user-space
shared libraries.

Actually, same bug was fixed by commit 664fee3dc379 ("perf probe: Do not
use dwfl_module_addrsym if dwarf_diename finds symbol name"), but commit
07d369857808 ("perf probe: Fix wrong address verification) reverted to
get actual symbol address from symtab.

This fixes it again by getting symbol address from DIE, and only if the
DIE has only address range, it uses dwfl_module_addrsym().

Fixes: 07d369857808 ("perf probe: Fix wrong address verification)
Reported-by: Alexandre Ghiti <alex@ghiti.fr>
Signed-off-by: Masami Hiramatsu <mhiramat@kernel.org>
Tested-by: Alexandre Ghiti <alex@ghiti.fr>
Cc: Alexander Shishkin <alexander.shishkin@linux.intel.com>
Cc: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Cc: Jiri Olsa <jolsa@redhat.com>
Cc: Namhyung Kim <namhyung@kernel.org>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Sasha Levin <sashal@kernel.org>
Link: http://lore.kernel.org/lkml/158281812176.476.14164573830975116234.stgit@devnote2
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
tools/perf/util/probe-finder.c