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perf symbols: Fix crash in elf_section_by_name

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Fixing crash in elf_section_by_name function caused by missing section
name in elf binary.

Reported-by: Albert Strasheim <albert@cloudflare.com>
Signed-off-by: Jiri Olsa <jolsa@redhat.com>
Cc: Albert Strasheim <albert@cloudflare.com>
Cc: Corey Ashford <cjashfor@linux.vnet.ibm.com>
Cc: David Ahern <dsahern@gmail.com>
Cc: Frederic Weisbecker <fweisbec@gmail.com>
Cc: Ingo Molnar <mingo@elte.hu>
Cc: Namhyung Kim <namhyung@kernel.org>
Cc: Paul Mackerras <paulus@samba.org>
Cc: Peter Zijlstra <a.p.zijlstra@chello.nl>
Link: http://lkml.kernel.org/r/1393767127-599-1-git-send-email-jolsa@redhat.com
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
This commit is contained in:
Jiri Olsa 2014-03-02 14:32:07 +01:00 committed by Arnaldo Carvalho de Melo
parent 02c5bb4a35
commit 155b3a13a6
1 changed files with 3 additions and 3 deletions
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6
tools/perf/util/symbol-elf.c
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@ -151,15 +151,15 @@ Elf_Scn *elf_section_by_name(Elf *elf, GElf_Ehdr *ep,
gelf_getshdr(sec, shp);
str = elf_strptr(elf, ep->e_shstrndx, shp->sh_name);
if (!strcmp(name, str)) {
if (str && !strcmp(name, str)) {
if (idx)
*idx = cnt;
break;
return sec;
}
++cnt;
}
return sec;
return NULL;
}
#define elf_section__for_each_rel(reldata, pos, pos_mem, idx, nr_entries) \