From: Ravi Bangoria <ravi.bango...@linux.vnet.ibm.com>
'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.bango...@linux.vnet.ibm.com>
Acked-by: Adrian Hunter <adrian.hun...@intel.com>
Cc: Alexander Shishkin <alexander.shish...@linux.intel.com>
Cc: Jiri Olsa <jo...@kernel.org>
Cc: Michael Ellerman <m...@ellerman.id.au>
Cc: Namhyung Kim <namhy...@kernel.org>
Cc: Peter Zijlstra <pet...@infradead.org>
Cc: linuxppc-dev@lists.ozlabs.org
Link:
http://lkml.kernel.org/r/1504170896-7876-1-git-send-email-ravi.bango...@linux.vnet.ibm.com
Signed-off-by: Arnaldo Carvalho de Melo <a...@redhat.com>
---
tools/perf/tests/code-reading.c | 5 +++++
1 file changed, 5 insertions(+)
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;
}
--
2.13.5
