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authorRavi Bangoria <ravi.bangoria@linux.vnet.ibm.com>2017-08-31 14:44:56 +0530
committerArnaldo Carvalho de Melo <acme@redhat.com>2017-09-01 14:45:59 -0300
commit9a805d8648ee09c136130fe4114a09574bc0b1ef (patch)
treeeb8d5f1e30955b31f62793a84b71429c94b7af24 /tools/perf/tests
parent27702bcfe8a125a1feeeb5f07526d63b20cac47f (diff)
downloadlinux-9a805d8648ee09c136130fe4114a09574bc0b1ef.tar.bz2
perf test powerpc: Fix 'Object code reading' test
'Object code reading' test always fails on powerpc guest. Two reasons for the failure are: 1. When elf section is too big (size beyond 'unsigned int' max value). objdump fails to disassemble from such section. This was fixed with commit 0f6329bd7fc ("binutils/objdump: Fix disassemble for huge elf sections") in binutils. 2. When the sample is from hypervisor. Hypervisor symbols can not be resolved within guest and thus thread__find_addr_map() fails for such symbols. Fix this by ignoring hypervisor symbols in the test. Signed-off-by: Ravi Bangoria <ravi.bangoria@linux.vnet.ibm.com> Acked-by: Adrian Hunter <adrian.hunter@intel.com> Cc: Alexander Shishkin <alexander.shishkin@linux.intel.com> Cc: Jiri Olsa <jolsa@kernel.org> Cc: Michael Ellerman <mpe@ellerman.id.au> Cc: Namhyung Kim <namhyung@kernel.org> Cc: Peter Zijlstra <peterz@infradead.org> Cc: linuxppc-dev@lists.ozlabs.org Link: http://lkml.kernel.org/r/1504170896-7876-1-git-send-email-ravi.bangoria@linux.vnet.ibm.com Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
Diffstat (limited to 'tools/perf/tests')
-rw-r--r--tools/perf/tests/code-reading.c5
1 files changed, 5 insertions, 0 deletions
diff --git a/tools/perf/tests/code-reading.c b/tools/perf/tests/code-reading.c
index 761c5a448c56..466a462b26d1 100644
--- a/tools/perf/tests/code-reading.c
+++ b/tools/perf/tests/code-reading.c
@@ -237,6 +237,11 @@ static int read_object_code(u64 addr, size_t len, u8 cpumode,
thread__find_addr_map(thread, cpumode, MAP__FUNCTION, addr, &al);
if (!al.map || !al.map->dso) {
+ if (cpumode == PERF_RECORD_MISC_HYPERVISOR) {
+ pr_debug("Hypervisor address can not be resolved - skipping\n");
+ return 0;
+ }
+
pr_debug("thread__find_addr_map failed\n");
return -1;
}