Android viewing segfaults on screen

Question

I have a webview in fragment. It has been working fine for several months. I played with the HTML embedded in it (the generated string), and I think it had a bad font reference.

The result is that now on one device, this web view always shows itself when displayed, but only on one device (Galaxy Nexus), which I tested on - testing on other devices, everything works fine. it loads in the background in the viewpager, so I know that it initializes correctly, but when it displays it, it always disconnects the application on this device.

So it looks like some cached data is not being cleared somewhere. I can’t understand why the same apk works on all other devices (all versions for Android, but only crash on this one device.

I tried to clear the cache using

_web.clearCache(true); webSettings.setCacheMode(WebSettings.LOAD_NO_CACHE); 

but no difference. Are there any other caches that I can clear? I rebooted the phone - no difference.

Look for any ideas on how to resolve this error - no matter how crazy!

Here is segfault - looks like related to OpenGL - does webview use opengl for fonts? - Is there a font cache for web browsing?

 D/TilesManager( 5776): new EGLContext from framework: 50c5df28 D/GLWebViewState( 5776): Reinit shader W/webcore ( 5776): skip viewSizeChanged as w is 0 D/GLWebViewState( 5776): Reinit transferQueue D/MyPodV2 ( 5776): load page:0 - 0.0 D/MyPodV2 ( 5776): load page:720 - 100.0 F/libc ( 5776): Fatal signal 11 (SIGSEGV) at 0x00000008 (code=1), thread 5776 (nelweb.mypod.v2) I/DEBUG ( 121): *** *** *** *** *** *** *** *** *** *** *** *** *** *** *** *** I/DEBUG ( 121): Build fingerprint: 'samsung/yakjuxw/maguro:4.1.1/JRO03C/I9250XWLH2:user/release-keys' I/DEBUG ( 121): pid: 5776, tid: 5776, name: nelweb.mypod.v2 >>> co.uk.sentinelweb.mypod.v2 <<< I/DEBUG ( 121): signal 11 (SIGSEGV), code 1 (SEGV_MAPERR), fault addr 00000008 I/DEBUG ( 121): r0 00000008 r1 585b7008 r2 00000010 r3 00000004 I/DEBUG ( 121): r4 56dbdb90 r5 56dbe9c0 r6 00000001 r7 00000004 I/DEBUG ( 121): r8 00000008 r9 00000001 sl 00000004 fp 00000001 I/DEBUG ( 121): ip 00000001 sp beac4180 lr 5863688c pc 5865f774 cpsr 80000010 I/DEBUG ( 121): d0 000000003e8374f1 d1 0000000000000000 I/DEBUG ( 121): d2 3e8374f100000000 d3 0000000000000000 I/DEBUG ( 121): d4 0000000000000000 d5 000000003f800000 I/DEBUG ( 121): d6 426d42bcc1248268 d7 3f80000000000000 I/DEBUG ( 121): d8 4411c6fc438013e9 d9 4507000000000000 I/DEBUG ( 121): d10 43e72bda4481c000 d11 43e670f943e670f9 I/DEBUG ( 121): d12 43e670f943e670f9 d13 bfa2695643f6cead I/DEBUG ( 121): d14 00000000bd134ab6 d15 0000000000000000 I/DEBUG ( 121): d16 0000000800000000 d17 0000000000000000 I/DEBUG ( 121): d18 0000000000000000 d19 0000000000000000 I/DEBUG ( 121): d20 3ff0000000000000 d21 0000000000000000 I/DEBUG ( 121): d22 0000000000000000 d23 0000000000000000 I/DEBUG ( 121): d24 0000000000000000 d25 0000000000000000 I/DEBUG ( 121): d26 0000000000000000 d27 0000000000000000 I/DEBUG ( 121): d28 0000000000000000 d29 0000000000000000 I/DEBUG ( 121): d30 0000000000000000 d31 0000000000000000 I/DEBUG ( 121): scr 20000013 I/DEBUG ( 121): I/DEBUG ( 121): backtrace: I/DEBUG ( 121): #00 pc 00034774 /system/vendor/lib/egl/libGLESv2_POWERVR_SGX540_120.so I/DEBUG ( 121): #01 pc 0000b888 /system/vendor/lib/egl/libGLESv2_POWERVR_SGX540_120.so I/DEBUG ( 121): I/DEBUG ( 121): stack: I/DEBUG ( 121): beac4140 03d00000 I/DEBUG ( 121): beac4144 00000000 I/DEBUG ( 121): beac4148 5c7b3dd0 I/DEBUG ( 121): beac414c 586d79f8 I/DEBUG ( 121): beac4150 56dbea6c I/DEBUG ( 121): beac4154 585b6c7c /dev/pvrsrvkm I/DEBUG ( 121): beac4158 00000002 I/DEBUG ( 121): beac415c 00000004 I/DEBUG ( 121): beac4160 56dbea6c I/DEBUG ( 121): beac4164 56dbdb90 I/DEBUG ( 121): beac4168 56dbe9bc I/DEBUG ( 121): beac416c 00000000 I/DEBUG ( 121): beac4170 00000004 I/DEBUG ( 121): beac4174 00000023 I/DEBUG ( 121): beac4178 df0027ad I/DEBUG ( 121): beac417c 00000000 I/DEBUG ( 121): #00 beac4180 56dbdb90 I/DEBUG ( 121): ........ ........ I/DEBUG ( 121): #01 beac4180 56dbdb90 I/DEBUG ( 121): beac4184 5863688c /system/vendor/lib/egl/libGLESv2_POWERVR_SGX540_120.so I/DEBUG ( 121): beac4188 56dbdb90 I/DEBUG ( 121): beac418c 00000004 I/DEBUG ( 121): beac4190 00000004 I/DEBUG ( 121): beac4194 00000000 I/DEBUG ( 121): beac4198 00000005 I/DEBUG ( 121): beac419c 5863898c /system/vendor/lib/egl/libGLESv2_POWERVR_SGX540_120.so I/DEBUG ( 121): beac41a0 56dbdb90 I/DEBUG ( 121): beac41a4 00000004 I/DEBUG ( 121): beac41a8 00000000 I/DEBUG ( 121): beac41ac 5868606c /system/vendor/lib/egl/libGLESv2_POWERVR_SGX540_120.so I/DEBUG ( 121): beac41b0 00000005 I/DEBUG ( 121): beac41b4 58639a70 /system/vendor/lib/egl/libGLESv2_POWERVR_SGX540_120.so (glDrawArrays+804) I/DEBUG ( 121): beac41b8 00000004 I/DEBUG ( 121): beac41bc 00000000 I/DEBUG ( 121): I/DEBUG ( 121): memory near r1: I/DEBUG ( 121): 585b6fe8 ffffffff ffffffff ffffffff ffffffff ................ I/DEBUG ( 121): 585b6ff8 ffffffff ffffffff ffffffff ffffffff ................ I/DEBUG ( 121): 585b7008 ffffffff ffffffff ffffffff ffffffff ................ I/DEBUG ( 121): 585b7018 ffffffff ffffffff ffffffff ffffffff ................ I/DEBUG ( 121): 585b7028 ffffffff ffffffff ffffffff ffffffff ................ I/DEBUG ( 121): I/DEBUG ( 121): memory near r4: I/DEBUG ( 121): 56dbdb70 10000298 58ec5138 5dc1229f 00000298 ....8Q.X.".].... I/DEBUG ( 121): 56dbdb80 58ca335c 5dbf356f 00000000 00000f9b \3.Xo5.]........ I/DEBUG ( 121): 56dbdb90 00000018 0000e7fd 00001c80 00001100 ................ I/DEBUG ( 121): 56dbdba0 00001100 00000024 000003aa 00000064 ....$.......d... I/DEBUG ( 121): 56dbdbb0 00000064 00000064 00000064 00000004 d...d...d....... I/DEBUG ( 121): I/DEBUG ( 121): memory near r5: I/DEBUG ( 121): 56dbe9a0 00000000 00000000 00000000 00000000 ................ I/DEBUG ( 121): 56dbe9b0 00000000 00000000 56dbe794 56dbe83c ...........V<..V I/DEBUG ( 121): 56dbe9c0 56dbe86c 00000000 00000000 00000000 l..V............ I/DEBUG ( 121): 56dbe9d0 00000000 00000000 00000000 00000000 ................ I/DEBUG ( 121): 56dbe9e0 00000002 00000003 00000003 00000004 ................ I/DEBUG ( 121): I/DEBUG ( 121): memory near sp: I/DEBUG ( 121): beac4160 56dbea6c 56dbdb90 56dbe9bc 00000000 l..V...V...V.... I/DEBUG ( 121): beac4170 00000004 00000023 df0027ad 00000000 ....#....'...... I/DEBUG ( 121): beac4180 56dbdb90 5863688c 56dbdb90 00000004 ...V.hcX...V.... I/DEBUG ( 121): beac4190 00000004 00000000 00000005 5863898c ..............cX I/DEBUG ( 121): beac41a0 56dbdb90 00000004 00000000 5868606c ...V........l`hX I/DEBUG ( 121): I/DEBUG ( 121): code around pc: I/DEBUG ( 121): 5865f754 e781410c e28cc001 e15c0003 3afffffa .A........\....: I/DEBUG ( 121): 5865f764 e8bd8010 e92d4010 e3a0c000 ea000004 .....@-......... I/DEBUG ( 121): 5865f774 e5904000 e5014008 e5904004 e0800002 .@... @ ...@...... I/DEBUG ( 121): 5865f784 e5014004 e15c0003 e2811008 e28cc001 .@.... \......... I/DEBUG ( 121): 5865f794 3afffff6 e8bd8010 e92d4010 e3a0c000 ...: .....@-..... I/DEBUG ( 121): I/DEBUG ( 121): code around lr: I/DEBUG ( 121): 5863686c e3530000 1a000005 e1a03007 e59c0018 ..S......0...... I/DEBUG ( 121): 5863687c e59c101c e59c2014 e1a0e00f e59cf024 ..... ......$... I/DEBUG ( 121): 5863688c e2866001 e2855004 e5942e50 e3a03001 .`...P..P....0.. I/DEBUG ( 121): 5863689c e1560002 3affffeb e2840eed e1a01008 ..V....:........ I/DEBUG ( 121): 586368ac e280000c e1a02003 e8bd41f0 eaffe178 ..... ...A..x... I/BootReceiver( 316): Copying /data/tombstones/tombstone_02 to DropBox (SYSTEM_TOMBSTONE) 

UPDATE 10/03/13: This is the code I use to stop caching - obviously, I am a little desperate.

 _web.clearCache(true); _web.setAnimationCacheEnabled(false); _web.setDrawingCacheEnabled(false); _web.setAlwaysDrawnWithCacheEnabled(false); _web.clearHistory(); _web.clearFormData(); webSettings.setJavaScriptEnabled(false); webSettings.setCacheMode(WebSettings.LOAD_NO_CACHE); webSettings.setAppCacheMaxSize(0); webSettings.setAppCachePath(""); webSettings.setAppCacheEnabled(false); getActivity().deleteDatabase("webview.db"); getActivity().deleteDatabase("webviewCache.db"); webSettings.setDomStorageEnabled(false); webSettings.setLoadsImagesAutomatically(false); _web.setWillNotCacheDrawing(true); webSettings.setBuiltInZoomControls(false); webSettings.setSupportZoom(false); webSettings.setSaveFormData(false); //_web.setWillNotDraw(true);// loads but stops drawing webSettings.setRenderPriority(WebSettings.RenderPriority.LOW); 

It is interesting to note that _web.setWillNotDraw (true); stops segfault but draws nothing (which is logical), therefore indicates that segfault should be in the webview. drawing code.

Answer 1

Webview caching is application-specific, so uninstalling and reinstalling the application should fix this if this is a temporary issue that you described.

In more detail, caches live in:

/data/data/your.package.name/cache/

which you might pay attention to, but then we fall into the realms of access to you.

If your application was created for debugging, this adb command may allow you to see the contents of the directory:

run-as your.package.name ls /data/data/your.package.name/cache/

In my Galaxy S3, related files are called "webviewCacheChromiumStaging" and "com.android.renderscript.cache", so your results may vary.

Answer 2

The options I use to prevent the use of the cache are:

  _web.clearCache(true); _web.setAppCacheEnabled(false); webSettings.setCacheMode(WebSettings.LOAD_NO_CACHE); webSettings.setAppCacheMaxSize(0); webSettings.setAppCacheEnabled(false); mContext.deleteDatabase("webview.db"); mContext.deleteDatabase("webviewCache.db"); 

also see this or this .