Messages in this thread Patch in this message | | | From | Cody P Schafer <> | Subject | [PATCH 05/16] perf symbol: don't try to synthesize plt without dynstr. | Date | Thu, 9 Aug 2012 15:18:30 -0700 |
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If .dynsym exists but .dynstr is empty (NO_BITS or size==0), a segfault occurs. Avoid this by checking that .dynstr is not empty.
Signed-off-by: Cody P Schafer <cody@linux.vnet.ibm.com> --- tools/perf/util/symbol.c | 3 +++ 1 file changed, 3 insertions(+)
diff --git a/tools/perf/util/symbol.c b/tools/perf/util/symbol.c index 254d4d8..8ae159a 100644 --- a/tools/perf/util/symbol.c +++ b/tools/perf/util/symbol.c @@ -1077,6 +1077,9 @@ dso__synthesize_plt_symbols(struct dso *dso, char *name, struct map *map, if (symstrs == NULL) goto out_elf_end; + if (symstrs->d_size == 0) + goto out_elf_end; + nr_rel_entries = shdr_rel_plt.sh_size / shdr_rel_plt.sh_entsize; plt_offset = shdr_plt.sh_offset; -- 1.7.11.3
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