Warning message about Stack Guard

[Marc Andreu Fernandez]

Hello team, 

I am getting this error while running the test cases with PowerMockito. Because of the SoftPwm API is based on static methods I have to use PowerMockito to write test cases. All work fine but I get this warning message below. After some googleing I found that I can ignore this warning but it is something that maybe fixed later on. I am not sure how to fix this as I do not know about the native libraries used in Pi4J. If you can give me some advise I would investigate further this issue. 

There is a better explanation in this post https://groups.google.com/forum/#!topic/fusionreactor/iRsnTT3al04

But it does not says how to fix the warning. 

Any advise would be great, many thanks. 

Java HotSpot(TM) 64-Bit Server VM warning: You have loaded library /tmp/libpi4j6819246752533973481.so which might have disabled stack guard. The VM will try to fix the stack guard now.

It's highly recommended that you fix the library with 'execstack -c <libfile>', or link it with '-z noexecstack'.

Mar 28, 2015 3:56:16 PM com.pi4j.util.NativeLibraryLoader load

SEVERE: Unable to load [libpi4j.so] using path: [/lib/libpi4j.so]

java.lang.UnsatisfiedLinkError: /tmp/libpi4j6819246752533973481.so: /tmp/libpi4j6819246752533973481.so: wrong ELF class: ELFCLASS32 (Possible cause: architecture word width mismatch)

at java.lang.ClassLoader$NativeLibrary.load(Native Method)

at java.lang.ClassLoader.loadLibrary1(ClassLoader.java:1965)

at java.lang.ClassLoader.loadLibrary0(ClassLoader.java:1890)

at java.lang.ClassLoader.loadLibrary(ClassLoader.java:1851)

at java.lang.Runtime.load0(Runtime.java:795)

at java.lang.System.load(System.java:1062)

at com.pi4j.util.NativeLibraryLoader.loadLibraryFromClasspath(NativeLibraryLoader.java:140)

at com.pi4j.util.NativeLibraryLoader.load(NativeLibraryLoader.java:89)

at com.pi4j.wiringpi.SoftPwm.<clinit>(SoftPwm.java:91)

at sun.reflect.GeneratedSerializationConstructorAccessor7.newInstance(Unknown Source)

at java.lang.reflect.Constructor.newInstance(Constructor.java:526)

at org.objenesis.instantiator.sun.SunReflectionFactoryInstantiator.newInstance(SunReflectionFactoryInstantiator.java:40)

at org.objenesis.ObjenesisBase.newInstance(ObjenesisBase.java:59)

at org.mockito.internal.creation.jmock.ClassImposterizer.createProxy(ClassImposterizer.java:128)

at org.mockito.internal.creation.jmock.ClassImposterizer.imposterise(ClassImposterizer.java:63)

at org.powermock.api.mockito.internal.mockcreation.MockCreator.createMethodInvocationControl(MockCreator.java:111)

at org.powermock.api.mockito.internal.mockcreation.MockCreator.mock(MockCreator.java:60)

at org.powermock.api.mockito.PowerMockito.mockStatic(PowerMockito.java:70)

at org.mandfer.sunfunpi4j.Ex06_RgbTest.testLedColorSet(Ex06_RgbTest.java:107)

at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)

at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:57)

at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)

at java.lang.reflect.Method.invoke(Method.java:606)

at org.junit.internal.runners.TestMethod.invoke(TestMethod.java:68)

at org.powermock.modules.junit4.internal.impl.PowerMockJUnit44RunnerDelegateImpl$PowerMockJUnit44MethodRunner.runTestMethod(PowerMockJUnit44RunnerDelegateImpl.java:310)

at org.junit.internal.runners.MethodRoadie$2.run(MethodRoadie.java:88)

at org.junit.internal.runners.MethodRoadie.runBeforesThenTestThenAfters(MethodRoadie.java:96)

at org.powermock.modules.junit4.internal.impl.PowerMockJUnit44RunnerDelegateImpl$PowerMockJUnit44MethodRunner.executeTest(PowerMockJUnit44RunnerDelegateImpl.java:294)

at org.powermock.modules.junit4.internal.impl.PowerMockJUnit47RunnerDelegateImpl$PowerMockJUnit47MethodRunner.executeTestInSuper(PowerMockJUnit47RunnerDelegateImpl.java:127)

at org.powermock.modules.junit4.internal.impl.PowerMockJUnit47RunnerDelegateImpl$PowerMockJUnit47MethodRunner.executeTest(PowerMockJUnit47RunnerDelegateImpl.java:82)

at org.powermock.modules.junit4.internal.impl.PowerMockJUnit44RunnerDelegateImpl$PowerMockJUnit44MethodRunner.runBeforesThenTestThenAfters(PowerMockJUnit44RunnerDelegateImpl.java:282)

at org.junit.internal.runners.MethodRoadie.runTest(MethodRoadie.java:86)

at org.junit.internal.runners.MethodRoadie.run(MethodRoadie.java:49)

at org.powermock.modules.junit4.internal.impl.PowerMockJUnit44RunnerDelegateImpl.invokeTestMethod(PowerMockJUnit44RunnerDelegateImpl.java:207)

at org.powermock.modules.junit4.internal.impl.PowerMockJUnit44RunnerDelegateImpl.runMethods(PowerMockJUnit44RunnerDelegateImpl.java:146)

at org.powermock.modules.junit4.internal.impl.PowerMockJUnit44RunnerDelegateImpl$1.run(PowerMockJUnit44RunnerDelegateImpl.java:120)

at org.junit.internal.runners.ClassRoadie.runUnprotected(ClassRoadie.java:33)

at org.junit.internal.runners.ClassRoadie.runProtected(ClassRoadie.java:45)

at org.powermock.modules.junit4.internal.impl.PowerMockJUnit44RunnerDelegateImpl.run(PowerMockJUnit44RunnerDelegateImpl.java:122)

at org.powermock.modules.junit4.common.internal.impl.JUnit4TestSuiteChunkerImpl.run(JUnit4TestSuiteChunkerImpl.java:106)

at org.powermock.modules.junit4.common.internal.impl.AbstractCommonPowerMockRunner.run(AbstractCommonPowerMockRunner.java:53)

at org.powermock.modules.junit4.PowerMockRunner.run(PowerMockRunner.java:59)

at org.apache.maven.surefire.junit4.JUnit4Provider.execute(JUnit4Provider.java:242)

at org.apache.maven.surefire.junit4.JUnit4Provider.executeTestSet(JUnit4Provider.java:137)

at org.apache.maven.surefire.junit4.JUnit4Provider.invoke(JUnit4Provider.java:112)

at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)

at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:57)

at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)

at java.lang.reflect.Method.invoke(Method.java:606)

at org.apache.maven.surefire.util.ReflectionUtils.invokeMethodWithArray(ReflectionUtils.java:189)

at org.apache.maven.surefire.booter.ProviderFactory$ProviderProxy.invoke(ProviderFactory.java:165)

at org.apache.maven.surefire.booter.ProviderFactory.invokeProvider(ProviderFactory.java:85)

at org.apache.maven.surefire.booter.ForkedBooter.runSuitesInProcess(ForkedBooter.java:115)

at org.apache.maven.surefire.booter.ForkedBooter.main(ForkedBooter.java:75)