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我最近有很多崩潰的應用程序，我不明白這個問題。的logcat的輸出是：CaseMapper.toLowerCase導致應用程序崩潰
02-16 18:47:44.839: D/dalvikvm(7264): JIT unchain all for threadid=1
02-16 18:47:45.589: W/dalvikvm(7264): threadid=14: spin on suspend #1 threadid=1 (pcf=0)
02-16 18:47:46.339: W/dalvikvm(7264): threadid=14: spin on suspend #2 threadid=1 (pcf=0)
02-16 18:47:46.340: I/dalvikvm(7264): "Thread-2069" prio=5 tid=14 RUNNABLE JIT
02-16 18:47:46.340: I/dalvikvm(7264): | group="main" sCount=0 dsCount=0 obj=0x41f13920 self=0x5f259a38
02-16 18:47:46.340: I/dalvikvm(7264): | sysTid=7715 nice=0 sched=0/0 cgrp=apps handle=1596300944
02-16 18:47:46.340: I/dalvikvm(7264): | state=R schedstat=(0 0 0) utm=7 stm=4 core=1
02-16 18:47:46.340: I/dalvikvm(7264): at java.lang.CaseMapper.toLowerCase(CaseMapper.java:~67)
02-16 18:47:46.340: I/dalvikvm(7264): at java.lang.String.toLowerCase(String.java:1496)
02-16 18:47:46.340: I/dalvikvm(7264): at de.malaka.player.utils.DBUtils.getTracksFromFolderWithoutSubfolder(DBUtils.java:384)
02-16 18:47:46.340: I/dalvikvm(7264): at de.malaka.player.fragment.FolderFragment$9.run(FolderFragment.java:615)
02-16 18:47:46.340: I/dalvikvm(7264): "main" prio=5 tid=1 RUNNABLE JIT
02-16 18:47:46.340: I/dalvikvm(7264): | group="main" sCount=1 dsCount=0 obj=0x41619e40 self=0x4153a828
02-16 18:47:46.340: I/dalvikvm(7264): | sysTid=7264 nice=0 sched=0/0 cgrp=apps handle=1073856852
02-16 18:47:46.340: I/dalvikvm(7264): | state=R schedstat=(0 0 0) utm=1482 stm=147 core=0
02-16 18:47:46.340: I/dalvikvm(7264): at de.malaka.player.fragment.FolderFragment.finishFillPath(FolderFragment.java:~676)
02-16 18:47:46.340: I/dalvikvm(7264): at de.malaka.player.fragment.FolderFragment.onBackClicked(FolderFragment.java:517)
02-16 18:47:46.340: I/dalvikvm(7264): at de.malaka.player.MainActivity.onBackPressed(MainActivity.java:736)
02-16 18:47:46.340: I/dalvikvm(7264): at android.app.Activity.onKeyUp(Activity.java:2201)
02-16 18:47:46.340: I/dalvikvm(7264): at android.view.KeyEvent.dispatch(KeyEvent.java:2664)
02-16 18:47:46.340: I/dalvikvm(7264): at android.app.Activity.dispatchKeyEvent(Activity.java:2431)
02-16 18:47:46.340: I/dalvikvm(7264): at android.support.v7.app.ActionBarActivityDelegateICS$WindowCallbackWrapper.dispatchKeyEvent(ActionBarActivityDelegateICS.java:245)
我有超過100行的是輸出中的上述和然後在最後我有此logcat的輸出：
02-16 18:47:52.415: I/dalvikvm(7264): "Binder_2" prio=5 tid=10 NATIVE
02-16 18:47:52.415: I/dalvikvm(7264): | group="main" sCount=1 dsCount=0 obj=0x41eecd98 self=0x5eca6008
02-16 18:47:52.415: I/dalvikvm(7264): | sysTid=7276 nice=0 sched=0/0 cgrp=apps handle=1533152376
02-16 18:47:52.415: I/dalvikvm(7264): | state=S schedstat=(0 0 0) utm=0 stm=0 core=0
02-16 18:47:52.418: I/dalvikvm(7264): #00 pc 00020660 /system/lib/libc.so (__ioctl+8)
02-16 18:47:52.418: I/dalvikvm(7264): #01 pc 0002cdb7 /system/lib/libc.so (ioctl+14)
02-16 18:47:52.418: I/dalvikvm(7264): #02 pc 0001d375 /system/lib/libbinder.so (android::IPCThreadState::talkWithDriver(bool)+140)
02-16 18:47:52.418: I/dalvikvm(7264): #03 pc 0001da7f /system/lib/libbinder.so (android::IPCThreadState::getAndExecuteCommand()+6)
02-16 18:47:52.418: I/dalvikvm(7264): #04 pc 0001db15 /system/lib/libbinder.so (android::IPCThreadState::joinThreadPool(bool)+48)
02-16 18:47:52.418: I/dalvikvm(7264): #05 pc 00021939 /system/lib/libbinder.so
02-16 18:47:52.418: I/dalvikvm(7264): #06 pc 0000ea75 /system/lib/libutils.so (android::Thread::_threadLoop(void*)+216)
02-16 18:47:52.418: I/dalvikvm(7264): #07 pc 0004d091 /system/lib/libandroid_runtime.so (android::AndroidRuntime::javaThreadShell(void*)+68)
02-16 18:47:52.418: I/dalvikvm(7264): #08 pc 0000e59d /system/lib/libutils.so
02-16 18:47:52.418: I/dalvikvm(7264): #09 pc 0000d240 /system/lib/libc.so (__thread_entry+72)
02-16 18:47:52.418: I/dalvikvm(7264): #10 pc 0000d3d8 /system/lib/libc.so (pthread_create+240)
02-16 18:47:52.418: I/dalvikvm(7264): at dalvik.system.NativeStart.run(Native Method)
02-16 18:47:52.418: I/dalvikvm(7264): "Binder_1" prio=5 tid=9 NATIVE
02-16 18:47:52.418: I/dalvikvm(7264): | group="main" sCount=1 dsCount=0 obj=0x41eecbb8 self=0x5b620250
02-16 18:47:52.418: I/dalvikvm(7264): | sysTid=7275 nice=0 sched=0/0 cgrp=apps handle=1533149192
02-16 18:47:52.418: I/dalvikvm(7264): | state=S schedstat=(0 0 0) utm=0 stm=0 core=0
02-16 18:47:52.420: I/dalvikvm(7264): #00 pc 00020660 /system/lib/libc.so (__ioctl+8)
02-16 18:47:52.420: I/dalvikvm(7264): #01 pc 0002cdb7 /system/lib/libc.so (ioctl+14)
02-16 18:47:52.420: I/dalvikvm(7264): #02 pc 0001d375 /system/lib/libbinder.so (android::IPCThreadState::talkWithDriver(bool)+140)
02-16 18:47:52.420: I/dalvikvm(7264): #03 pc 0001da7f /system/lib/libbinder.so (android::IPCThreadState::getAndExecuteCommand()+6)
02-16 18:47:52.420: I/dalvikvm(7264): #04 pc 0001db15 /system/lib/libbinder.so (android::IPCThreadState::joinThreadPool(bool)+48)
02-16 18:47:52.420: I/dalvikvm(7264): #05 pc 00021939 /system/lib/libbinder.so
02-16 18:47:52.421: I/dalvikvm(7264): #06 pc 0000ea75 /system/lib/libutils.so (android::Thread::_threadLoop(void*)+216)
02-16 18:47:52.421: I/dalvikvm(7264): #07 pc 0004d091 /system/lib/libandroid_runtime.so (android::AndroidRuntime::javaThreadShell(void*)+68)
02-16 18:47:52.421: I/dalvikvm(7264): #08 pc 0000e59d /system/lib/libutils.so
02-16 18:47:52.421: I/dalvikvm(7264): #09 pc 0000d240 /system/lib/libc.so (__thread_entry+72)
02-16 18:47:52.421: I/dalvikvm(7264): #10 pc 0000d3d8 /system/lib/libc.so (pthread_create+240)
02-16 18:47:52.421: I/dalvikvm(7264): at dalvik.system.NativeStart.run(Native Method)
02-16 18:47:52.421: I/dalvikvm(7264): "FinalizerWatchdogDaemon" daemon prio=5 tid=8 WAIT
02-16 18:47:52.421: I/dalvikvm(7264): | group="system" sCount=1 dsCount=0 obj=0x41ee99b8 self=0x5b51f330
02-16 18:47:52.421: I/dalvikvm(7264): | sysTid=7274 nice=0 sched=0/0 cgrp=apps handle=1532098440
02-16 18:47:52.421: I/dalvikvm(7264): | state=S schedstat=(0 0 0) utm=0 stm=0 core=0
02-16 18:47:52.421: I/dalvikvm(7264): at java.lang.Object.wait(Native Method)
02-16 18:47:52.421: I/dalvikvm(7264): - waiting on <0x416234e8> (a java.lang.Daemons$FinalizerWatchdogDaemon)
02-16 18:47:52.421: I/dalvikvm(7264): at java.lang.Object.wait(Object.java:364)
02-16 18:47:52.421: I/dalvikvm(7264): at java.lang.Daemons$FinalizerWatchdogDaemon.waitForObject(Daemons.java:230)
02-16 18:47:52.421: I/dalvikvm(7264): at java.lang.Daemons$FinalizerWatchdogDaemon.run(Daemons.java:207)
02-16 18:47:52.421: I/dalvikvm(7264): at java.lang.Thread.run(Thread.java:841)
02-16 18:47:52.421: I/dalvikvm(7264): "FinalizerDaemon" daemon prio=5 tid=7 WAIT
02-16 18:47:52.421: I/dalvikvm(7264): | group="system" sCount=1 dsCount=0 obj=0x41ee9808 self=0x5e3e58c0
02-16 18:47:52.421: I/dalvikvm(7264): | sysTid=7273 nice=0 sched=0/0 cgrp=apps handle=1581145368
02-16 18:47:52.421: I/dalvikvm(7264): | state=S schedstat=(0 0 0) utm=7 stm=1 core=1
02-16 18:47:52.421: I/dalvikvm(7264): at java.lang.Object.wait(Native Method)
02-16 18:47:52.421: I/dalvikvm(7264): - waiting on <0x4160e7d8> (a java.lang.ref.ReferenceQueue)
02-16 18:47:52.421: I/dalvikvm(7264): at java.lang.Object.wait(Object.java:401)
02-16 18:47:52.422: I/dalvikvm(7264): at java.lang.ref.ReferenceQueue.remove(ReferenceQueue.java:102)
02-16 18:47:52.422: I/dalvikvm(7264): at java.lang.ref.ReferenceQueue.remove(ReferenceQueue.java:73)
02-16 18:47:52.422: I/dalvikvm(7264): at java.lang.Daemons$FinalizerDaemon.run(Daemons.java:170)
02-16 18:47:52.422: I/dalvikvm(7264): at java.lang.Thread.run(Thread.java:841)
02-16 18:47:52.422: I/dalvikvm(7264): "ReferenceQueueDaemon" daemon prio=5 tid=6 WAIT
02-16 18:47:52.422: I/dalvikvm(7264): | group="system" sCount=1 dsCount=0 obj=0x41ee96a0 self=0x5e3e5018
02-16 18:47:52.422: I/dalvikvm(7264): | sysTid=7272 nice=0 sched=0/0 cgrp=apps handle=1581143152
02-16 18:47:52.422: I/dalvikvm(7264): | state=S schedstat=(0 0 0) utm=0 stm=0 core=0
02-16 18:47:52.422: I/dalvikvm(7264): at java.lang.Object.wait(Native Method)
02-16 18:47:52.422: I/dalvikvm(7264): - waiting on <0x4160e700>
02-16 18:47:52.422: I/dalvikvm(7264): at java.lang.Object.wait(Object.java:364)
02-16 18:47:52.422: I/dalvikvm(7264): at java.lang.Daemons$ReferenceQueueDaemon.run(Daemons.java:130)
02-16 18:47:52.422: I/dalvikvm(7264): at java.lang.Thread.run(Thread.java:841)
02-16 18:47:52.422: I/dalvikvm(7264): "Compiler" daemon prio=5 tid=5 VMWAIT
02-16 18:47:52.422: I/dalvikvm(7264): | group="system" sCount=1 dsCount=0 obj=0x41ee95b0 self=0x5e3e49b8
02-16 18:47:52.422: I/dalvikvm(7264): | sysTid=7271 nice=0 sched=0/0 cgrp=apps handle=1581139824
02-16 18:47:52.422: I/dalvikvm(7264): | state=S schedstat=(0 0 0) utm=12 stm=7 core=0
02-16 18:47:52.423: I/dalvikvm(7264): #00 pc 000219dc /system/lib/libc.so (__futex_syscall3+8)
02-16 18:47:52.423: I/dalvikvm(7264): #01 pc 0000ef94 /system/lib/libc.so (__pthread_cond_timedwait_relative+48)
02-16 18:47:52.423: I/dalvikvm(7264): #02 pc 0000effc /system/lib/libc.so (__pthread_cond_timedwait+64)
02-16 18:47:52.423: I/dalvikvm(7264): #03 pc 00076e73 /system/lib/libdvm.so
02-16 18:47:52.423: I/dalvikvm(7264): #04 pc 00057841 /system/lib/libdvm.so
02-16 18:47:52.423: I/dalvikvm(7264): #05 pc 0000d240 /system/lib/libc.so (__thread_entry+72)
02-16 18:47:52.423: I/dalvikvm(7264): #06 pc 0000d3d8 /system/lib/libc.so (pthread_create+240)
02-16 18:47:52.423: I/dalvikvm(7264): at dalvik.system.NativeStart.run(Native Method)
02-16 18:47:52.423: I/dalvikvm(7264): "JDWP" daemon prio=5 tid=4 VMWAIT
02-16 18:47:52.423: I/dalvikvm(7264): | group="system" sCount=1 dsCount=0 obj=0x41ee94c8 self=0x5e3e4110
02-16 18:47:52.423: I/dalvikvm(7264): | sysTid=7270 nice=0 sched=0/0 cgrp=apps handle=1096844008
02-16 18:47:52.423: I/dalvikvm(7264): | state=S schedstat=(0 0 0) utm=0 stm=0 core=2
02-16 18:47:52.424: I/dalvikvm(7264): #00 pc 000207b0 /system/lib/libc.so (select+20)
02-16 18:47:52.424: I/dalvikvm(7264): #01 pc 0006437b /system/lib/libdvm.so
02-16 18:47:52.424: I/dalvikvm(7264): #02 pc 00066ee1 /system/lib/libdvm.so
02-16 18:47:52.424: I/dalvikvm(7264): #03 pc 00057841 /system/lib/libdvm.so
02-16 18:47:52.424: I/dalvikvm(7264): #04 pc 0000d240 /system/lib/libc.so (__thread_entry+72)
02-16 18:47:52.424: I/dalvikvm(7264): #05 pc 0000d3d8 /system/lib/libc.so (pthread_create+240)
02-16 18:47:52.424: I/dalvikvm(7264): at dalvik.system.NativeStart.run(Native Method)
02-16 18:47:52.424: I/dalvikvm(7264): "Signal Catcher" daemon prio=5 tid=3 SUSPENDED
02-16 18:47:52.424: I/dalvikvm(7264): | group="system" sCount=1 dsCount=0 obj=0x41ee93d0 self=0x58572a58
02-16 18:47:52.424: I/dalvikvm(7264): | sysTid=7269 nice=0 sched=0/0 cgrp=apps handle=1482106896
02-16 18:47:52.424: I/dalvikvm(7264): | state=S schedstat=(0 0 0) utm=0 stm=0 core=0
02-16 18:47:52.426: I/dalvikvm(7264): #00 pc 000219dc /system/lib/libc.so (__futex_syscall3+8)
02-16 18:47:52.426: I/dalvikvm(7264): #01 pc 0000ef94 /system/lib/libc.so (__pthread_cond_timedwait_relative+48)
02-16 18:47:52.426: I/dalvikvm(7264): #02 pc 0000effc /system/lib/libc.so (__pthread_cond_timedwait+64)
02-16 18:47:52.426: I/dalvikvm(7264): #03 pc 0005658b /system/lib/libdvm.so
02-16 18:47:52.426: I/dalvikvm(7264): #04 pc 00056b4d /system/lib/libdvm.so (dvmChangeStatus(Thread*, ThreadStatus)+34)
02-16 18:47:52.426: I/dalvikvm(7264): #05 pc 00054cd7 /system/lib/libdvm.so
02-16 18:47:52.426: I/dalvikvm(7264): #06 pc 00057841 /system/lib/libdvm.so
02-16 18:47:52.426: I/dalvikvm(7264): #07 pc 0000d240 /system/lib/libc.so (__thread_entry+72)
02-16 18:47:52.426: I/dalvikvm(7264): #08 pc 0000d3d8 /system/lib/libc.so (pthread_create+240)
02-16 18:47:52.426: I/dalvikvm(7264): at dalvik.system.NativeStart.run(Native Method)
02-16 18:47:52.426: I/dalvikvm(7264): "GC" daemon prio=5 tid=2 VMWAIT
02-16 18:47:52.426: I/dalvikvm(7264): | group="system" sCount=1 dsCount=0 obj=0x41ee92f0 self=0x5b64b258
02-16 18:47:52.426: I/dalvikvm(7264): | sysTid=7268 nice=0 sched=0/0 cgrp=apps handle=1533323936
02-16 18:47:52.426: I/dalvikvm(7264): | state=S schedstat=(0 0 0) utm=1 stm=9 core=1
02-16 18:47:52.428: I/dalvikvm(7264): #00 pc 000219dc /system/lib/libc.so (__futex_syscall3+8)
02-16 18:47:52.428: I/dalvikvm(7264): #01 pc 0000ef94 /system/lib/libc.so (__pthread_cond_timedwait_relative+48)
02-16 18:47:52.428: I/dalvikvm(7264): #02 pc 0000effc /system/lib/libc.so (__pthread_cond_timedwait+64)
02-16 18:47:52.428: I/dalvikvm(7264): #03 pc 00075837 /system/lib/libdvm.so
02-16 18:47:52.428: I/dalvikvm(7264): #04 pc 00057841 /system/lib/libdvm.so
02-16 18:47:52.428: I/dalvikvm(7264): #05 pc 0000d240 /system/lib/libc.so (__thread_entry+72)
02-16 18:47:52.428: I/dalvikvm(7264): #06 pc 0000d3d8 /system/lib/libc.so (pthread_create+240)
02-16 18:47:52.428: I/dalvikvm(7264): at dalvik.system.NativeStart.run(Native Method)
02-16 18:47:52.428: I/dalvikvm(7264): NATIVE THREADS:
02-16 18:47:52.428: I/dalvikvm(7264): "GL updater" sysTid=7301 nice=-10 sched=0/0 cgrp=apps
02-16 18:47:52.428: I/dalvikvm(7264): | state=S schedstat=(0 0 0) utm=2 stm=12 core=0
02-16 18:47:52.428: E/dalvikvm(7264): threadid=14: stuck on threadid=1, giving up
02-16 18:47:52.429: D/dalvikvm(7264): threadid=14: sending two SIGSTKFLTs to threadid=1 (tid=7264) to cause debuggerd dump
02-16 18:47:52.431: A/libc(7264): Fatal signal 16 (SIGSTKFLT) at 0x00001c60 (code=-6), thread 7264 (e.malaka.player)
當它發生
我進行數據庫查詢以獲取子文件夾中的所有軌道，然後檢查文件是否在特定文件夾中，而不是在具有正則表達式的子文件夾中。這是代碼：
public static final String DATA = MediaStore.Audio.Media.DATA;
public static void getTracksFromFolderWithoutSubfolder(
Context context, File f, ArrayList<TrackInfo> q,
int icon) {
String pattern = Pattern.quote(f.getAbsolutePath().toLowerCase()) + "/[^/]*";
Cursor mCursor = null;
String selection = MediaStore.Audio.Media.IS_MUSIC + " != 0 AND " + DATA + " LIKE \"" + f.getAbsolutePath() + "/%\"";
Uri contentUri = Media.getContentUriForPath(Environment.getExternalStorageDirectory().getPath());
String projection[] = new String[]{DATA};
mCursor = context.getContentResolver().query(contentUri, projection, selection, null, DATA);
String data, fileName[];
while(mCursor.moveToNext()){
data = mCursor.getString(0);
if(data.toLowerCase().matches(pattern)){ // this is the line the logcat refers to
fileName = data.split("/");
q.add(new TrackInfo(fileName[fileName.length-1], null, data, null, -1, icon, false));
}
}
mCursor.close();
}
錯誤似乎只如果我把這個方法與File f爲我的音樂設備（約1200音樂文件，包括子文件夾）上的主文件夾中發生。但它不會每次都發生。事實上，在十次調用中它大約發生兩次或三次。
有人可以告訴我這可能來自哪裏？也許我缺少釋放一些資源或類似的東西..
我目前用Moto G的工作，是Android 4.4
感謝
這裏只有一個問題 - 您從Android操作系統下的Linux操作系統獲得了SIGSTKFLT。當一個協處理器告訴主處理器它的堆棧處於不良狀態（通常是空的或滿的）時，這種情況很少發生。 –
啊，所以這意味着我的問題是'threadid = 1'？ – MalaKa
可能但不一定。在這裏你有一個真正的不尋常的案例，我從來沒有真正看到堆棧錯誤 - 腐敗的堆棧通常只會引發最終的段錯誤。如果它是由一個協處理器引起的，那麼它可能只是在主線程上佔了上風。僅供參考，所有線程都被拋棄的原因是，每當信號殺死一個進程時，Android的行爲就像這樣，以最大化調試信息。 –