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author | Masami Hiramatsu <mhiramat@kernel.org> | 2020-11-27 14:48:55 +0900 |
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committer | Arnaldo Carvalho de Melo <acme@redhat.com> | 2020-11-27 14:36:15 -0300 |
commit | a9ffd0484eb4426e6befd07e7be6c01108716302 (patch) | |
tree | d7a6e0370102541d04c49f0bbde673694311c809 /lib/cmdline.c | |
parent | ab4200c17ba6fe71d2da64317aae8a8aa684624c (diff) | |
download | linux-a9ffd0484eb4426e6befd07e7be6c01108716302.tar.bz2 |
perf probe: Change function definition check due to broken DWARF
Since some gcc generates a broken DWARF which lacks DW_AT_declaration
attribute from the subprogram DIE of function prototype.
(https://gcc.gnu.org/bugzilla/show_bug.cgi?id=97060)
So, in addition to the DW_AT_declaration check, we also check the
subprogram DIE has DW_AT_inline or actual entry pc.
Committer testing:
# cat /etc/fedora-release
Fedora release 33 (Thirty Three)
#
Before:
# perf test vfs_getname
78: Use vfs_getname probe to get syscall args filenames : FAILED!
79: Check open filename arg using perf trace + vfs_getname : FAILED!
81: Add vfs_getname probe to get syscall args filenames : FAILED!
#
After:
# perf test vfs_getname
78: Use vfs_getname probe to get syscall args filenames : Ok
79: Check open filename arg using perf trace + vfs_getname : Ok
81: Add vfs_getname probe to get syscall args filenames : Ok
#
Reported-by: Thomas Richter <tmricht@linux.ibm.com>
Signed-off-by: Masami Hiramatsu <mhiramat@kernel.org>
Tested-by: Arnaldo Carvalho de Melo <acme@redhat.com>
Cc: Sumanth Korikkar <sumanthk@linux.ibm.com>
Link: http://lore.kernel.org/lkml/160645613571.2824037.7441351537890235895.stgit@devnote2
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
Diffstat (limited to 'lib/cmdline.c')
0 files changed, 0 insertions, 0 deletions