Android NDK定位.so文件crash代码位置

参考：http://blog.csdn.net/xyang81/article/details/42319789

问题：      QRD8926_110202平台的Browser必现报错。（去年的项目，客户反馈问题，提case让QRD提供技术支持）

测试步骤：浏览一会新闻或其他网站(>=3分钟)，然后进入百度音乐(music.baidu.com/fm)界面, 点击歌手，播放一首歌，必现报错。　　　　　　

　F/libc    (15979): Fatal signal 7 (SIGBUS) at 0x00000007 (code=1), thread 15979 (android.browser)
　......

　　I/DEBUG ( 232): backtrace:
　　I/DEBUG ( 232): #00 pc 0016f2ac /system/lib/libwebcore.so
　　I/DEBUG ( 232): #01 pc 0016f3a9 /system/lib/libwebcore.so
　　I/DEBUG ( 232): #02 pc 0016f3cd /system/lib/libwebcore.so
　　I/DEBUG ( 232): #03 pc 0016f4ad /system/lib/libwebcore.so

　　......

需要定位libwebcore.so出现crash的代码位置。使用命令：ndk-stack -sym <path> [-dump <path>]

注意：要有源码才行。以QRD8926_110202平台为例，需要与手机版本对应的编译完成的源码，

　　　　　　　　　　符号表的位置out argetproductXXXsymbolssystemlib

　 ndk-stack -sym  out argetproductmsm8226symbolssystemlib  -dump  crash.log

********** Crash dump: **********

pid: 15979, tid: 15979, name: android.browser  >>> com.android.browser <<<
signal 7 (SIGBUS), code 1 (BUS_ADRALN), fault addr 00000007
Stack frame #00  pc 0016f2ac  /system/lib/libwebcore.so: Routine WebCore::operator<(WebCore::TimerHeapElement const&, WebCore::TimerHeapElement const&) at QRD8926_110202/LINUX/android/external/webkit/Source/WebCore/platform/Timer.cpp:108
Stack frame #01  pc 0016f3a9  /system/lib/libwebcore.so: Routine void std::__push_heap<WebCore::TimerHeapIterator, int, WebCore::TimerHeapElement>(WebCore::TimerHeapIterator, int, int, WebCore::TimerHeapElement) at QRD8926_110202/LINUX/android/external/stlport/stlport/stl/_heap.c:46 (discriminator 2)
Stack frame #02  pc 0016f3cd  /system/lib/libwebcore.so: Routine __push_heap_aux<WebCore::TimerHeapIterator, int, WebCore::TimerHeapElement> at QRD8926_110202/LINUX/android/external/stlport/stlport/stl/_heap.c:59
Stack frame #03  pc 0016f4ad  /system/lib/libwebcore.so: Routine WebCore::TimerBase::heapPop() at QRD8926_110202/LINUX/android/external/webkit/Source/WebCore/platform/Timer.cpp:268
Stack frame #04  pc 0016f587  /system/lib/libwebcore.so: Routine WebCore::TimerBase::heapDelete() at QRD8926_110202/LINUX/android/external/webkit/Source/WebCore/platform/Timer.cpp:235
Stack frame #05  pc 00124741  /system/lib/libwebcore.so: Routine WebCore::HTMLMediaElement::updatePlayState() at QRD8926_110202/LINUX/android/external/webkit/Source/WebCore/html/HTMLMediaElement.cpp:2249
Stack frame #06  pc 00125ad3  /system/lib/libwebcore.so: Routine WebCore::HTMLMediaElement::mediaPlayerPlaybackStateChanged(WebCore::MediaPlayer*) at QRD8926_110202/LINUX/android/external/webkit/Source/WebCore/html/HTMLMediaElement.cpp:2007
Stack frame #07  pc 00178f23  /system/lib/libwebcore.so: Routine WebCore::MediaPlayer::playbackStateChanged() at QRD8926_110202/LINUX/android/external/webkit/Source/WebCore/platform/graphics/MediaPlayer.cpp:867
Stack frame #08  pc 00263d87  /system/lib/libwebcore.so: Routine WebCore::MediaPlayerPrivate::pause() at QRD8926_110202/LINUX/android/external/webkit/Source/WebKit/android/WebCoreSupport/MediaPlayerPrivateAndroid.cpp:106
Stack frame #09  pc 00178c97  /system/lib/libwebcore.so: Routine WebCore::MediaPlayer::pause() at QRD8926_110202/LINUX/android/external/webkit/Source/WebCore/platform/graphics/MediaPlayer.cpp:430
Stack frame #10  pc 00124733  /system/lib/libwebcore.so: Routine WebCore::HTMLMediaElement::updatePlayState() at QRD8926_110202/LINUX/android/external/webkit/Source/WebCore/html/HTMLMediaElement.cpp:2246
Stack frame #11  pc 00124df5  /system/lib/libwebcore.so: Routine WebCore::HTMLMediaElement::mediaPlayerTimeChanged(WebCore::MediaPlayer*) at QRD8926_110202/LINUX/android/external/webkit/Source/WebCore/html/HTMLMediaElement.cpp:1937
Stack frame #12  pc 00178ef3  /system/lib/libwebcore.so: Routine WebCore::MediaPlayer::timeChanged() at QRD8926_110202/LINUX/android/external/webkit/Source/WebCore/platform/graphics/MediaPlayer.cpp:837
Stack frame #13  pc 00263fad  /system/lib/libwebcore.so: Routine WebCore::MediaPlayerPrivate::onEnded() at QRD8926_110202/LINUX/android/external/webkit/Source/WebKit/android/WebCoreSupport/MediaPlayerPrivateAndroid.cpp:163
Stack frame #14  pc 000203cc  /system/lib/libdvm.so (dvmPlatformInvoke+112): Routine dvmPlatformInvoke at QRD8926_110202/LINUX/android/dalvik/vm/arch/arm/CallEABI.S:258
Stack frame #15  pc 00050d8f  /system/lib/libdvm.so (dvmCallJNIMethod(unsigned int const*, JValue*, Method const*, Thread*)+398): Routine dvmCallJNIMethod(unsigned int const*, JValue*, Method const*, Thread*) at QRD8926_110202/LINUX/android/dalvik/vm/Jni.cpp:1214
Stack frame #16  pc 00029860  /system/lib/libdvm.so: Routine dalvik_mterp at QRD8926_110202/LINUX/android/dalvik/vm/mterp/out/InterpAsm-armv7-a-neon.S:16314
Stack frame #17  pc 0002e218  /system/lib/libdvm.so (dvmInterpret(Thread*, Method const*, JValue*)+184): Routine dvmInterpret(Thread*, Method const*, JValue*) at QRD8926_110202/LINUX/android/dalvik/vm/interp/Interp.cpp:1956
Stack frame #18  pc 000630a7  /system/lib/libdvm.so (dvmInvokeMethod(Object*, Method const*, ArrayObject*, ArrayObject*, ClassObject*, bool)+350): Routine dvmInvokeMethod(Object*, Method const*, ArrayObject*, ArrayObject*, ClassObject*, bool) at QRD8926_110202/LINUX/android/dalvik/vm/interp/Stack.cpp:737
Stack frame #19  pc 0006accb  /system/lib/libdvm.so: Routine Dalvik_java_lang_reflect_Method_invokeNative at QRD8926_110202/LINUX/android/dalvik/vm/native/java_lang_reflect_Method.cpp:101
Stack frame #20  pc 00029860  /system/lib/libdvm.so: Routine dalvik_mterp at QRD8926_110202/LINUX/android/dalvik/vm/mterp/out/InterpAsm-armv7-a-neon.S:16314
Stack frame #21  pc 0002e218  /system/lib/libdvm.so (dvmInterpret(Thread*, Method const*, JValue*)+184): Routine dvmInterpret(Thread*, Method const*, JValue*) at QRD8926_110202/LINUX/android/dalvik/vm/interp/Interp.cpp:1956
Stack frame #22  pc 00062de9  /system/lib/libdvm.so (dvmCallMethodV(Thread*, Method const*, Object*, bool, JValue*, std::__va_list)+292): Routine dvmCallMethodV(Thread*, Method const*, Object*, bool, JValue*, std::__va_list) at QRD8926_110202/LINUX/android/dalvik/vm/interp/Stack.cpp:526
Stack frame #23  pc 0004c973  /system/lib/libdvm.so: Routine CallStaticVoidMethodV at QRD8926_110202/LINUX/android/dalvik/vm/Jni.cpp:2151
Stack frame #24  pc 0004ee0b  /system/lib/libandroid_runtime.so: Routine _JNIEnv::CallStaticVoidMethod(_jclass*, _jmethodID*, ...) at QRD8926_110202/LINUX/android/libnativehelper/include/nativehelper/jni.h:780
Stack frame #25  pc 0004fa9b  /system/lib/libandroid_runtime.so (android::AndroidRuntime::start(char const*, char const*)+378): Routine android::AndroidRuntime::start(char const*, char const*) at QRD8926_110202/LINUX/android/frameworks/base/core/jni/AndroidRuntime.cpp:886
Stack frame #26  pc 0000105b  /system/bin/app_process
Stack frame #27  pc 0000dcf7  /system/lib/libc.so (__libc_init+50): Routine __libc_init at QRD8926_110202/LINUX/android/bionic/libc/bionic/libc_init_dynamic.cpp:112
Stack frame #28  pc 00000d7c  /system/bin/app_process