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authorMasami Hiramatsu <mhiramat@kernel.org>2020-11-27 14:48:55 +0900
committerArnaldo Carvalho de Melo <acme@redhat.com>2020-11-27 14:36:15 -0300
commita9ffd0484eb4426e6befd07e7be6c01108716302 (patch)
treed7a6e0370102541d04c49f0bbde673694311c809 /lib/cmdline.c
parentab4200c17ba6fe71d2da64317aae8a8aa684624c (diff)
downloadlinux-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>
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