如何利用ndk-stack工具查看so库的调用堆栈【代码示例】?
http://hi.baidu.com/subo4110/item/d00395b3bf63e4432bebe36d
Step1:Android应用主文件:CPPTestActivity.java
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package com.subo4110.cpptest; import android.os.Bundle; import android.app.Activity; import android.util.Log; import android.view.Menu; public class CPPTestActivity extends Activity { private static final String TAG = "CPPTestActivity" ; @Override protected void onCreate(Bundle savedInstanceState) { super .onCreate(savedInstanceState); setContentView(R.layout.activity_cpptest); Log.w(TAG, "load native so file, add return: " + UtilsJNILib.add( 193.1245 , 577.90 )); Log.w(TAG, "load native so file, pow return: " + UtilsJNILib.pow( 2 , 13 )); Log.w(TAG, "load native so file, pow return: " + UtilsJNILib.div( 21.456 , 0 )); } @Override public boolean onCreateOptionsMenu(Menu menu) { // Inflate the menu; this adds items to the action bar if it is present. getMenuInflater().inflate(R.menu.cpptest, menu); return true ; } } |
Step2:定义native接口的java类:UtilsJNILib.java
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package com.subo4110.cpptest; public class UtilsJNILib { static { System.loadLibrary( "UtilsJNILib" ); } public static native double add( double a, double b); public static native double pow( double a, double b); public static native double div( double a, double b); } |
Step3:调用JNI命令并实现JNI接口的C++类:UtilsJNILib.cpp,具体的JNI命令为:javah -jni com.subo4110.cpptest.UtilsJNILib
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#include <jni.h> #include <android/log.h> #include <math.h> #define LOG_TAG "UtilsJNILib" #define LOGI(...) __android_log_print(ANDROID_LOG_INFO,LOG_TAG,__VA_ARGS__) #define LOGE(...) __android_log_print(ANDROID_LOG_ERROR,LOG_TAG,__VA_ARGS__) extern "C" { jint JNI_OnLoad(JavaVM *vm, void *reserved) { LOGI( "JNI_OnLoad" ); return JNI_VERSION_1_4; } /* * Class: com_subo4110_cpptest_UtilsJNILib * Method: nativeAdd * Signature: (DD)D */ JNIEXPORT jdouble JNICALL Java_com_subo4110_cpptest_UtilsJNILib_add (JNIEnv *env, jclass obj, jdouble a, jdouble b) { return (a+b); } /* * Class: com_subo4110_cpptest_UtilsJNILib * Method: pow * Signature: (DD)D */ JNIEXPORT jdouble JNICALL Java_com_subo4110_cpptest_UtilsJNILib_pow (JNIEnv *env, jclass obj, jdouble a, jdouble b) { return pow (a, b); } /* * Class: com_subo4110_cpptest_UtilsJNILib * Method: div * Signature: (DD)D */ JNIEXPORT jdouble JNICALL Java_com_subo4110_cpptest_UtilsJNILib_div (JNIEnv *env, jclass obj, jdouble a, jdouble b) { char * buf = 0; buf[1] = 'a' ; //此处将报错,Fatal Signal 11。。。 return a/b; } }; |
Step4:用来ndk-build的make文件:Android.mk
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LOCAL_PATH := $(call my- dir ) include $(CLEAR_VARS) LOCAL_LDLIBS := -llog LOCAL_MODULE := UtilsJNILib LOCAL_SRC_FILES := UtilsJNILib.cpp include $(BUILD_SHARED_LIBRARY) |
Step5:运行后,将在Eclipse的logcat窗口看到如下log信息:
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05-08 16:45:56.800: E/Trace(12735): error opening trace file: No such file or directory (2) 05-08 16:45:56.800: D/ActivityThread(12735): setTargetHeapUtilization:0.25 05-08 16:45:56.800: D/ActivityThread(12735): setTargetHeapIdealFree:8388608 05-08 16:45:56.800: D/ActivityThread(12735): setTargetHeapConcurrentStart:2097152 05-08 16:45:57.000: W/ResourceType(12735): No package identifier when getting value for resource number 0x00000000 05-08 16:45:57.000: W/PackageManager(12735): Failure retrieving resources forcom.subo4110.cpptest: Resource ID #0x0 05-08 16:45:57.030: D/IconCustomizer(12735): Generate customized icon for com.subo4110.cpptest.png 05-08 16:45:57.030: W/IconCustomizer(12735): can't load transform_config.xml 05-08 16:45:57.100: I/themeservice(12735): add pending job /data/data/com.subo4110.cpptest/cache/com.subo4110.cpptest.png 05-08 16:45:57.120: I/themeservice(12735): binding service 05-08 16:45:57.130: I/UtilsJNILib(12735): JNI_OnLoad 05-08 16:45:57.130: W/CPPTestActivity(12735): load native so file, add return: 771.0245 05-08 16:45:57.130: W/CPPTestActivity(12735): load native so file, pow return: 8192.0 05-08 16:45:57.130: A/libc(12735): Fatal signal 11 (SIGSEGV) at 0x00000001 (code=1), thread 12735 (ubo4110.cpptest) |
Step6:在cmd中输入命令:adb logcat | ndk-stack -sym D:\workspace\Android\MyOwnSamples\JNICPPTest\obj\local\armeabi
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C:\Users\yongle.liu>adb logcat | ndk-stack -sym D:\workspace\Android\MyOwnSamples\JNICPPTest\obj\ local \armeabi ********** Crash dump: ********** Build fingerprint: 'unknown' pid: 4079, tid: 4095 >>> com.mobinex.service:TeliDHService <<< signal 11 (SIGSEGV), code 1 (SEGV_MAPERR), fault addr 03f9b848 Stack frame #00 pc 00019012 /system/lib/libutils.so (_ZNK7android7RefBase9decStrongEPKv) Stack frame #01 pc 00010930 /system/lib/libcamera_client.so (_ZN7android2spINS_7ICameraEED1Ev) Stack frame #02 pc 00010d82 /system/lib/libcamera_client.so (_ZN7android6CameraD1Ev) Stack frame #03 pc 00010de8 /system/lib/libcamera_client.so (_ZN7android6CameraD0Ev) Stack frame #04 pc 000118f2 /system/lib/libcamera_client.so (_ZTv0_n12_N7android6CameraD0Ev) Stack frame #05 pc 00019038 /system/lib/libutils.so (_ZNK7android7RefBase9decStrongEPKv) Stack frame #06 pc 00017398 /system/lib/libbinder.so (_ZN7android14IPCThreadState14joinThreadPoolEb) Stack frame #07 pc 0001c668 /system/lib/libbinder.so Stack frame #08 pc 00020156 /system/lib/libutils.so (_ZN7android6Thread11_threadLoopEPv) Stack frame #09 pc 00096260 /system/lib/libandroid_runtime.so (_ZN7android14AndroidRuntime15javaThreadShellEPv) Stack frame #10 pc 0002079c /system/lib/libutils.so Stack frame #11 pc 00012134 /system/lib/libc.so (__thread_entry) Stack frame #12 pc 00011c88 /system/lib/libc.so (pthread_create) Crash dump is completed ********** Crash dump: ********** Build fingerprint: 'unknown' pid: 4201, tid: 4201 >>> com.subo4110.cpptest <<< signal 11 (SIGSEGV), code 1 (SEGV_MAPERR), fault addr 00000001 Stack frame #00 pc 00000fee /data/data/com.subo4110.cpptest/lib/libUtilsJNILib.so (Java_com_subo4110_cpptest_UtilsJNILib_div): Routine Java_com_subo4110_cpptest_UtilsJNILib_div in jni/UtilsJNILib.cp p:54 Stack frame #01 pc 00018c30 /system/lib/libdvm.so (dvmPlatformInvoke) Stack frame #02 pc 00053146 /system/lib/libdvm.so (_Z16dvmCallJNIMethodPKjP6JValuePK6MethodP6Thread) Stack frame #03 pc 00046c44 /system/lib/libdvm.so (_Z21dvmCheckCallJNIMethodPKjP6JValuePK6MethodP6Thread) Stack frame #04 pc 00054e74 /system/lib/libdvm.so (_Z22dvmResolveNativeMethodPKjP6JValuePK6MethodP6Thread) Stack frame #05 pc 0002aa4c /system/lib/libdvm.so Stack frame #06 pc 0002e1fc /system/lib/libdvm.so (_Z12dvmInterpretP6ThreadPK6MethodP6JValue) Stack frame #07 pc 00066832 /system/lib/libdvm.so (_Z15dvmInvokeMethodP6ObjectPK6MethodP11ArrayObjectS5_P11ClassObjectb) Stack frame #08 pc 0006dc62 /system/lib/libdvm.so Stack frame #09 pc 00054e74 /system/lib/libdvm.so (_Z22dvmResolveNativeMethodPKjP6JValuePK6MethodP6Thread) Stack frame #10 pc 0002aa4c /system/lib/libdvm.so Stack frame #11 pc 0002e1fc /system/lib/libdvm.so (_Z12dvmInterpretP6ThreadPK6MethodP6JValue) Stack frame #12 pc 00066b02 /system/lib/libdvm.so (_Z14dvmCallMethodVP6ThreadPK6MethodP6ObjectbP6JValueSt9__va_list) Stack frame #13 pc 0004f19a /system/lib/libdvm.so Stack frame #14 pc 00043b20 /system/lib/libdvm.so Stack frame #15 pc 000962fe /system/lib/libandroid_runtime.so Stack frame #16 pc 00096e66 /system/lib/libandroid_runtime.so (_ZN7android14AndroidRuntime5startEPKcS2_) Stack frame #17 pc 00008f0e /system/bin/app_process Stack frame #18 pc 00015a34 /system/lib/libc.so (__libc_init) Crash dump is completed ********** Crash dump: ********** Build fingerprint: 'unknown' pid: 4309, tid: 4309 >>> com.subo4110.cpptest <<< signal 11 (SIGSEGV), code 1 (SEGV_MAPERR), fault addr 00000001 Stack frame #00 pc 00000fee /data/data/com.subo4110.cpptest/lib/libUtilsJNILib.so (Java_com_subo4110_cpptest_UtilsJNILib_div): Routine Java_com_subo4110_cpptest_UtilsJNILib_div in jni/UtilsJNILib.cp p:54 Stack frame #01 pc 00018c30 /system/lib/libdvm.so (dvmPlatformInvoke) Stack frame #02 pc 00053146 /system/lib/libdvm.so (_Z16dvmCallJNIMethodPKjP6JValuePK6MethodP6Thread) Stack frame #03 pc 00046c44 /system/lib/libdvm.so (_Z21dvmCheckCallJNIMethodPKjP6JValuePK6MethodP6Thread) Stack frame #04 pc 00054e74 /system/lib/libdvm.so (_Z22dvmResolveNativeMethodPKjP6JValuePK6MethodP6Thread) Stack frame #05 pc 0002aa4c /system/lib/libdvm.so Stack frame #06 pc 0002e1fc /system/lib/libdvm.so (_Z12dvmInterpretP6ThreadPK6MethodP6JValue) Stack frame #07 pc 00066832 /system/lib/libdvm.so (_Z15dvmInvokeMethodP6ObjectPK6MethodP11ArrayObjectS5_P11ClassObjectb) Stack frame #08 pc 0006dc62 /system/lib/libdvm.so Stack frame #09 pc 00054e74 /system/lib/libdvm.so (_Z22dvmResolveNativeMethodPKjP6JValuePK6MethodP6Thread) Stack frame #10 pc 0002aa4c /system/lib/libdvm.so Stack frame #11 pc 0002e1fc /system/lib/libdvm.so (_Z12dvmInterpretP6ThreadPK6MethodP6JValue) Stack frame #12 pc 00066b02 /system/lib/libdvm.so (_Z14dvmCallMethodVP6ThreadPK6MethodP6ObjectbP6JValueSt9__va_list) Stack frame #13 pc 0004f19a /system/lib/libdvm.so Stack frame #14 pc 00043b20 /system/lib/libdvm.so Stack frame #15 pc 000962fe /system/lib/libandroid_runtime.so Stack frame #16 pc 00096e66 /system/lib/libandroid_runtime.so (_ZN7android14AndroidRuntime5startEPKcS2_) Stack frame #17 pc 00008f0e /system/bin/app_process Stack frame #18 pc 00015a34 /system/lib/libc.so (__libc_init) C:\Users\yongle.liu> |
Step7:堆栈中最后2个里面,可以找到signal 11 (SIGSEGV), code 1 (SEGV_MAPERR), fault addr 00000001,而这个地址与Eclipse的logcat的log信息中的错误地址一样。那么你就可以开始找错误啦!
参考资料:http://www.cocos2d-x.org/boards/6/topics/13392?r=13472
但是,我还没有找到如何查看多个so库有链接关系的情况,如何利用ndk-stack查看堆栈?望高手指点!