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Android: JNI WARNING: illegal start byte
开发十年,就只剩下这套Java开发体系了   
文件名: 04 German-Deutsch Als Erdbeben werden messbare Erschütterungen des Erdkörpers bezeichnet. Der deutlich größte.txt 进入目录listfiles, 直接挂掉: W/dalvikvm( 452): JNI WARNING: illegal start byte 0xfc W/dalvikvm( 452): string: '04 German-Deutsch Als Erdbeben werden messbare Erschngen des Erdk bezeichnet. Der deutlich grp3' W/dalvikvm( 452): in Ljava/io/File;.listImpl ([B)[Ljava/lang/String; (NewStringUTF) 转帖一篇,解决方法: http://hi.baidu.com/aokikyon/blog/item/df8b5822ad64b0a94623e8be.html Android Wifi bug——JNI WARNING illegal start byte 2010-07-15 11:01 在调试Wifi时,一旦开始搜索Wifi,系统就会down掉,打开debug信息,发现如下内容 I/ActivityManager( 825): Starting activity: Intent { act=android.intent.action.MAIN cmp=com.android.settings/.wifi.WifiSettings } D/dalvikvm( 893): GC freed 3772 objects / 231344 bytes in 79ms D/SettingsWifiEnabler( 893): Received wifi state changed from Enabling to Enabled I/ActivityManager( 825): Displayed activity com.android.settings/.wifi.WifiSettings: 707 ms (total 707 ms) I/wpa_supplicant( 966): CTRL-EVENT-SCAN-RESULTS Ready V/WifiStateTracker( 825): Connection to supplicant established, state=SCANNING D/NetworkStateTracker( 825): setDetailed state, old =IDLE and new state=SCANNING D/ConnectivityService( 825): ConnectivityChange for WIFI: DISCONNECTED/SCANNING D/DataConnectionTracker( 875): enableApnType(default), isApnTypeActive = false and state = IDLE I/wpa_supplicant( 966): CTRL-EVENT-SCAN-RESULTS Ready W/dalvikvm( 825): JNI WARNING: illegal start byte 0xb3 W/dalvikvm( 825): string: 'bssid / frequency / signal level / flags / ssid W/dalvikvm( 825): 00:10:18:00:00:b6 2437 171 wireless W/dalvikvm( 825): 02:2c:7c:04:c7:01 2437 169 [IBSS] WZD-成人教育学院' W/dalvikvm( 825): in Landroid/net/wifi/WifiNative;.scanResultsCommand ()Ljava/lang/String; (NewStringUTF) I/dalvikvm( 825): "Binder Thread #5" prio=5 tid=63 NATIVE I/dalvikvm( 825): | group="main" sCount=0 dsCount=0 s=N obj=0x43a5ea30 self=0x3b1178 I/dalvikvm( 825): | sysTid=911 nice=0 sched=0/0 cgrp=unknown handle=3871032 I/dalvikvm( 825): at android.net.wifi.WifiNative.scanResultsCommand(Native Method) I/dalvikvm( 825): at com.android.server.WifiService.getScanResults(WifiService.java:1050) I/dalvikvm( 825): at android.net.wifi.IWifiManager$Stub.onTransact(IWifiManager.java:126) I/dalvikvm( 825): at android.os.Binder.execTransact(Binder.java:287) I/dalvikvm( 825): at dalvik.system.NativeStart.run(Native Method) I/dalvikvm( 825): E/dalvikvm( 825): VM aborting I/DEBUG ( 811): *** *** *** *** *** *** *** *** *** *** *** *** *** *** *** *** I/DEBUG ( 811): Build fingerprint: 'ky6410/ky6410/ky6410/:2.1-update1/ECLAIR/eng.kyon.20100609.214617:eng/test-keys' I/DEBUG ( 811): pid: 825, tid: 911 >>> system_server <<< I/DEBUG ( 811): signal 11 (SIGSEGV), fault addr deadd00d I/DEBUG ( 811): r0 00000328 r1 afe1332d r2 0000000c r3 deadd00d I/DEBUG ( 811): r4 00000026 r5 47f6ab74 r6 000000c0 r7 fffe6184 I/DEBUG ( 811): r8 47f6bb90 r9 46215ef8 10 46215ee4 fp 003b1108 I/DEBUG ( 811): ip ad07f14c sp 47f6ab18 lr afe142e9 pc ad035006 cpsr 20000030 I/DEBUG ( 811): #00 pc 00035006 /system/lib/libdvm.so I/DEBUG ( 811): #01 pc 00027698 /system/lib/libdvm.so I/DEBUG ( 811): #02 pc 00028220 /system/lib/libdvm.so I/DEBUG ( 811): #03 pc 00028298 /system/lib/libdvm.so I/DEBUG ( 811): #04 pc 0003595a /system/lib/libandroid_runtime.so I/DEBUG ( 811): #05 pc 00035d54 /system/lib/libandroid_runtime.so I/DEBUG ( 811): #06 pc 00035d92 /system/lib/libandroid_runtime.so I/DEBUG ( 811): #07 pc 0000ef74 /system/lib/libdvm.so I/DEBUG ( 811): #08 pc 00037b28 /system/lib/libdvm.so I/DEBUG ( 811): #09 pc 000311f2 /system/lib/libdvm.so I/DEBUG ( 811): #10 pc 00013c88 /system/lib/libdvm.so I/DEBUG ( 811): #11 pc 00019588 /system/lib/libdvm.so I/DEBUG ( 811): #12 pc 00018a5c /system/lib/libdvm.so I/DEBUG ( 811): #13 pc 0004d1ee /system/lib/libdvm.so 具体错误在 W/dalvikvm( 825): in Landroid/net/wifi/WifiNative;.scanResultsCommand ()Ljava/lang/String; (NewStringUTF) 这句提交了一个illegal的UTF8字符 Google半天,大意为Google的UTF8是经过修改过的,对一些UTF8字符不兼容。 在dalvik/vm/checkjni.c中做判断 /* * Verify that "bytes" points to valid "modified UTF-8" data. */ static void checkUtfString(JNIEnv* env, const char* bytes, bool nullOk, const char* func) { const char* origBytes = bytes; if (bytes == NULL) { if (!nullOk) { LOGW("JNI WARNING: unexpectedly null UTF string/n"); goto fail; } return; } while (*bytes != '/0') { u1 utf8 = *(bytes++); // Switch on the high four bits. switch (utf8 >> 4) { case 0x00: case 0x01: case 0x02: case 0x03: case 0x04: case 0x05: case 0x06: case 0x07: { // Bit pattern 0xxx. No need for any extra bytes. break; } case 0x08: case 0x09: case 0x0a: case 0x0b: case 0x0f: { /* * Bit pattern 10xx or 1111, which are illegal start bytes. * Note: 1111 is valid for normal UTF-8, but not the * modified UTF-8 used here. */ LOGW("JNI WARNING: illegal start byte 0x%x/n", utf8); goto fail; } case 0x0e: { // Bit pattern 1110, so there are two additional bytes. utf8 = *(bytes++); if ((utf8 & 0xc0) != 0x80) { LOGW("JNI WARNING: illegal continuation byte 0x%x/n", utf8); goto fail; } // Fall through to take care of the final byte. } case 0x0c: case 0x0d: { // Bit pattern 110x, so there is one additional byte. utf8 = *(bytes++); if ((utf8 & 0xc0) != 0x80) { LOGW("JNI WARNING: illegal continuation byte 0x%x/n", utf8); goto fail; } break; } } } return; fail: LOGW(" string: '%s'/n", origBytes); showLocation(dvmGetCurrentJNIMethod(), func); abortMaybe(); } 如果出现非法的UTF8字符就挂掉,这个也太狠了吧。 继续追踪根源,非法UTF8字符提交来自/frameworks/base/core/jni/android_net_wifi_Wifi.cpp的函数 // Send a command to the supplicant, and return the reply as a String static jstring doStringCommand(JNIEnv *env, const char *cmd) { char reply[4096]; if (doCommand(cmd, reply, sizeof(reply)) != 0) { return env->NewStringUTF(NULL); } else { return env->NewStringUTF(reply); } } 网上提出的解决方案是将非法头字符修正为“?”,将其他非法字符修正为“0x80”,patch后的函数如下: // Send a command to the supplicant, and return the reply as a String static jstring doStringCommand(JNIEnv *env, const char *cmd) { char reply[4096]; char* bytes; if (doCommand(cmd, reply, sizeof(reply)) != 0) { return env->NewStringUTF(NULL); } else { // Make sure reply only contains valid UTF-8 Characters // This is borrowed from CheckJni.c bytes = reply; while (*bytes != '/0') { char utf8 = *bytes; switch (utf8 >> 4) { case 0x00: case 0x01: case 0x02: case 0x03: case 0x04: case 0x05: case 0x06: case 0x07: { // Bit pattern 0xxx. No need for any extra bytes. break; } case 0x08: case 0x09: case 0x0a: case 0x0b: case 0x0f: { /* * Bit pattern 10xx or 1111, which are illegal start bytes. * Note: 1111 is valid for normal UTF-8, but not the * modified UTF-8 used here. + */ LOGW("JNI WARNING: illegal start byte 0x%x, changing to '?'/n", utf8); //return env->NewStringUTF("AP"); //modify by rockie *bytes = '?'; } case 0x0e: { // Bit pattern 1110, so there are two additional bytes. utf8 = *(++bytes); if ((utf8 & 0xc0) != 0x80) { LOGW("JNI WARNING: illegal continuation byte 0x%x, changing to 0x80./n", utf8); *bytes = 0x80; } // Fall through to take care of the final byte. } case 0x0c: case 0x0d: { // Bit pattern 110x, so there is one additional byte. utf8 = *(++bytes); if ((utf8 & 0xc0) != 0x80) { LOGW("JNI WARNING: illegal continuation byte 0x%x, changing to 0x80./n", utf8); *bytes = 0x80; } break; } } bytes++; } return env->NewStringUTF(reply); } } 非常不解的是,patch后还是会有漏网的错误字符被提交到checkjni.c,导致系统挂掉 D/wpa_supplicant( 976): Setting scan request: 5 sec 0 usec W/wifi ( 826): JNI WARNING: illegal start byte 0xb3, changing to '?' W/wifi ( 826): JNI WARNING: illegal continuation byte 0xc9, changing to 0x80. W/wifi ( 826): JNI WARNING: illegal continuation byte 0xc8, changing to 0x80. W/wifi ( 826): JNI WARNING: illegal continuation byte 0xd3, changing to 0x80. W/wifi ( 826): JNI WARNING: illegal start byte 0xfd, changing to '?' W/wifi ( 826): JNI WARNING: illegal continuation byte 0xd1, changing to 0x80. W/dalvikvm( 826): JNI WARNING by rockie : illegal start byte 0x80, changing to '?' W/dalvikvm( 826): JNI WARNING: illegal continuation byte 0xcb W/dalvikvm( 826): string: 'bssid / frequency / signal level / flags / ssid W/dalvikvm( 826): 00:21:91:6f:f1:f2 2437 205 dlink W/dalvikvm( 826): 00:10:18:00:00:b6 2437 175 wireless W/dalvikvm( 826): 02:2c:7c:04:c7:01 2437 169 [IBSS] WZD-? 私虁? г? W/dalvikvm( 826): in Landroid/net/wifi/WifiNative;.scanResultsCommand ()Ljava/lang/String; (NewStringUTF) I/dalvikvm( 826): "Binder Thread #6" prio=5 tid=67 NATIVE I/dalvikvm( 826): | group="main" sCount=0 dsCount=0 s=N obj=0x43a15cb8 self=0x3d68f0 I/dalvikvm( 826): | sysTid=951 nice=0 sched=0/0 cgrp=unknown handle=4069976 I/dalvikvm( 826): at android.net.wifi.WifiNative.scanResultsCommand(Native Method) I/dalvikvm( 826): at com.android.server.WifiService.getScanResults(WifiService.java:1050) I/dalvikvm( 826): at android.net.wifi.IWifiManager$Stub.onTransact(IWifiManager.java:126) I/dalvikvm( 826): at android.os.Binder.execTransact(Binder.java:287) I/dalvikvm( 826): at dalvik.system.NativeStart.run(Native Method) I/dalvikvm( 826): E/dalvikvm( 826): VM aborting I/DEBUG ( 811): *** *** *** *** *** *** *** *** *** *** *** *** *** *** *** *** I/DEBUG ( 811): Build fingerprint: 'ky6410/ky6410/ky6410/:2.1-update1/ECLAIR/eng.kyon.20100714.175405:eng/test-keys' I/DEBUG ( 811): pid: 826, tid: 951 >>> system_server <<< I/DEBUG ( 811): signal 11 (SIGSEGV), fault addr deadd00d I/DEBUG ( 811): r0 00000328 r1 afe1332d r2 0000000c r3 deadd00d I/DEBUG ( 811): r4 00000026 r5 fffe6184 r6 47f44b6c r7 fffe6184 I/DEBUG ( 811): r8 47f45b90 r9 438f3ef8 10 438f3ee4 fp 003e1a28 I/DEBUG ( 811): ip ad07f14c sp 47f44b08 lr afe142e9 pc ad035006 cpsr 20000030 I/DEBUG ( 811): #00 pc 00035006 /system/lib/libdvm.so I/DEBUG ( 811): #01 pc 00027698 /system/lib/libdvm.so I/DEBUG ( 811): #02 pc 00028222 /system/lib/libdvm.so I/DEBUG ( 811): #03 pc 0002829c /system/lib/libdvm.so 最后,小改下checkjni.c,注释掉goto fail。 不过,会不会有后遗症? 网友评论: 1 kennygetone 2010-07-15 19:31 | 回复 adb remount adb pull /system/build.prop . delete line ro.kernel.android.checkjni=1 adb push build.prop /system/. adb shell reboot if you build with user mode, you can't find this issue. 2 gaogaf 2010-08-23 18:44 | 回复 评论很重要 评论有效吗?试试
原文链接:http://blog.csdn.net/zmyde2010/article/details/6042434
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