2015年5月6日 (三) 12:22 Hovercool

2015-05-06T12:22:17Z

新页面

*字串资源文件：frameworks/base/core/res/res/values-zh-rCN/strings.xml
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*在用户空间访问内核空间地址是不允许的，会抛出 "SIGSEGV" Exception:

:如在 frameworks/base/services/surfaceflinger/DisplayHardware/HWComposer.cpp中加上以下代码：
<pre class="prettyprint">
status_t HWComposer::prepare() const {
if (mList && mFlinger->isLayerScreenShotVisible()) {
mList->flags |= HWC_LAYERSCREENSHOT_EXIST;
}

if (mList && (mList->flags & HWC_GEOMETRY_CHANGED)) {
//hwc_layer_list_t* list = mList;
LOGD("kaigo, HWComposer_prepare, list:%d, list->flags:%d, mList->numHwLayers:%d", (int)mList, mList->flags, mList->numHwLayers);
for (size_t i=0 ; i<mList->numHwLayers ; i++) {
//dump_layer(&list->hwLayers[i]);
LOGD("kaigo, HWComposer_prepare, in for, i:%d", i);
LOGD("kaigo, HWComposer_prepare, %d, i:%d, list->hwLayers[i]:%d", __LINE__, i, mList->hwLayers[i]); //这里会出错！
}
}

int err = mHwc->prepare(mHwc, mList);
...
</pre>

<pre>
...
07-02 10:11:30.054 D/SurfaceFlinger( 655): kaigo, HWComposer_prepare, list:25733432, list->flags:1, mList->numHwLayers:1
07-02 10:11:30.054 D/SurfaceFlinger( 655): kaigo, HWComposer_prepare, in for, i:0
07-02 10:11:30.054 F/libc ( 655): Fatal signal 11 (SIGSEGV) at 0xdeadbaad (code=1)
07-02 10:11:30.054 D/AEE/AED ( 107): $===AEE===AEE===AEE===$
07-02 10:11:30.054 D/AEE/AED ( 107): p 0 poll events 1 revents 0
...
07-02 10:11:31.270 I/AEE/AED ( 667): $** *** *** *** *** *** *** *** Exception *** *** *** *** *** *** *** **$
07-02 10:11:31.270 I/AEE/AED ( 667): Build Info: 'ALPS.ICS2.MP:ALPS.ICS2.MP.V1:MT6577:S01,vivo/bbk77_cu_ics2/bbk77_cu_ics2:4.0.4/IMM76D/1344848531:eng/test-keys'
07-02 10:11:31.271 I/AEE/AED ( 667): Exception Log Time:[Mon Jul 2 10:11:31 CST 2012] [62.970000]
07-02 10:11:31.271 I/AEE/AED ( 667):
07-02 10:11:31.271 I/AEE/AED ( 667): Exception Class: Native (NE)
07-02 10:11:31.271 I/AEE/AED ( 667): Exception Type: SIGSEGV
07-02 10:11:31.271 I/AEE/AED ( 667):
07-02 10:11:31.271 I/AEE/AED ( 667): Current Executing Process:
07-02 10:11:31.271 I/AEE/AED ( 667): pid: 655, tid: 657
07-02 10:11:31.271 I/AEE/AED ( 667): /system/bin/surfaceflinger
07-02 10:11:31.271 I/AEE/AED ( 667):
07-02 10:11:31.271 I/AEE/AED ( 667): Backtrace:
07-02 10:11:31.271 I/AEE/AED ( 667): #00 pc 0001f830 /system/lib/libc.so
07-02 10:11:31.271 I/AEE/AED ( 667): #01 pc 0001acf4 /system/lib/libsurfaceflinger.so (_ZNK7android10HWComposer7prepareEv)
07-02 10:11:31.271 I/AEE/AED ( 667): #02 pc 0001ec92 /system/lib/libsurfaceflinger.so (_ZN7android14SurfaceFlinger21setupHardwareComposerERNS_6RegionE)
07-02 10:11:31.271 I/AEE/AED ( 667): #03 pc 0001f372 /system/lib/libsurfaceflinger.so (_ZN7android14SurfaceFlinger13handleRepaintEv)
07-02 10:11:31.271 I/AEE/AED ( 667): #04 pc 00020d86 /system/lib/libsurfaceflinger.so (_ZN7android14SurfaceFlinger10threadLoopEv)
07-02 10:11:31.271 I/AEE/AED ( 667): #05 pc 0002453e /system/lib/libutils.so (_ZN7android6Thread11_threadLoopEPv)
07-02 10:11:31.271 I/AEE/AED ( 667): #06 pc 00024b84 /system/lib/libutils.so
07-02 10:11:31.271 I/AEE/AED ( 667): #07 pc 000136cc /system/lib/libc.so (__thread_entry)
...
</pre>
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杂乱的学习笔记 - 版本历史

2015年5月6日 (三) 12:22 Hovercool