* [dts] [dpdk-dts] [PATCH] tests/multiprocess: disable ASLR for multiprocess tests.
@ 2017-12-05 12:42 Jogarao Nartu
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From: Jogarao Nartu @ 2017-12-05 12:42 UTC (permalink / raw)
To: yong.liu; +Cc: dts, jerin.jacob, Jogarao Nartu
Address-Space Layout Randomization can interfere hugepages memory
mapping so disable this feature to run multi-process applications.
Re-enable ASLR after tests completed.
Signed-off-by: Jogarao Nartu <njogarao@caviumnetworks.com>
---
tests/TestSuite_multiprocess.py | 13 +++++++++++++
1 file changed, 13 insertions(+)
diff --git a/tests/TestSuite_multiprocess.py b/tests/TestSuite_multiprocess.py
index 1bac35c..6479082 100644
--- a/tests/TestSuite_multiprocess.py
+++ b/tests/TestSuite_multiprocess.py
@@ -55,6 +55,15 @@ class TestMultiprocess(TestCase, IxiaPacketGenerator):
"""
#self.verify('bsdapp' not in self.target, "Multiprocess not support freebsd")
+ # Get aslr(Addressspace layout randomization) value from /proc entries.
+ self.aslr_path = "/proc/sys/kernel/randomize_va_space"
+ cmd = "cat %s" % self.aslr_path
+ self.randomize_va_space = int(self.dut.send_expect("%s" % cmd, "#"))
+
+ # Disable aslr to run multiprocess test
+ cmd = "echo 0 > %s" % self.aslr_path
+ self.dut.send_expect("%s" %cmd, "#")
+
self.verify(len(self.dut.get_all_cores()) >= 4, "Not enough Cores")
self.tester.extend_external_packet_generator(TestMultiprocess, self)
@@ -273,6 +282,10 @@ class TestMultiprocess(TestCase, IxiaPacketGenerator):
"""
Run after each test suite.
"""
+ # Reset original aslr value
+ cmd = "echo %d > %s" % (self.randomize_va_space,self.aslr_path)
+ self.dut.send_expect("%s" %cmd, "#")
+
self.dut.kill_all()
self.dut.close_session(self.session_secondary)
--
2.7.4
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