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【通译】(23)NDK Stack

发布时间: 2012-06-27 14:20:09 作者: rapoo

【翻译】(23)NDK Stack

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英文文档见android-ndk-r6b的documentation.html

属于Android Native Development Kit (NDK)的一部分

http://developer.android.com/sdk/ndk/index.html

翻译仅个人见解

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Android ndk-stack tool

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Android ndk-stack工具

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Introduction:

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介绍:

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This document describes the 'ndk-stack' tool that is distributed with the Android NDK, since release r6.

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本文档描述ndk-stack工具,它从发布版r6开始由Anroid NDK分发。

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Overview:

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概述:

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'ndk-stack' is a simple tool that allows you to filter stack traces as they appear in the output of 'adb logcat' and replace any address inside a shared library with the corresponding : values.

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ndk-stack是一个简单工具,允许你过滤在adb logcat输出中显示的堆栈跟踪,并且把共享库内的任意地址替换成相应的冒号值(注:这里应该指<函数名><文件名>:<行号>格式,见下)

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In a nutshell, it will translate something like:

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简而言之,它将翻译好像这样子的东西:

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? ? I/DEBUG ? ( ? 31): *** *** *** *** *** *** *** *** *** *** *** *** *** *** *** ***

? ? I/DEBUG ? ( ? 31): Build fingerprint: 'generic/google_sdk/generic/:2.2/FRF91/43546:eng/test-keys'

? ? I/DEBUG ? ( ? 31): pid: 351, tid: 351 ?%gt;%gt;%gt; /data/local/ndk-tests/crasher <<<

? ? I/DEBUG ? ( ? 31): signal 11 (SIGSEGV), fault addr 0d9f00d8

? ? I/DEBUG ? ( ? 31): ?r0 0000af88 ?r1 0000a008 ?r2 baadf00d ?r3 0d9f00d8

? ? I/DEBUG ? ( ? 31): ?r4 00000004 ?r5 0000a008 ?r6 0000af88 ?r7 00013c44

? ? I/DEBUG ? ( ? 31): ?r8 00000000 ?r9 00000000 ?10 00000000 ?fp 00000000

? ? I/DEBUG ? ( ? 31): ?ip 0000959c ?sp be956cc8 ?lr 00008403 ?pc 0000841e ?cpsr 60000030

? ? I/DEBUG ? ( ? 31): ? ? ? ? ?#00 ?pc 0000841e ?/data/local/ndk-tests/crasher

? ? I/DEBUG ? ( ? 31): ? ? ? ? ?#01 ?pc 000083fe ?/data/local/ndk-tests/crasher

? ? I/DEBUG ? ( ? 31): ? ? ? ? ?#02 ?pc 000083f6 ?/data/local/ndk-tests/crasher

? ? I/DEBUG ? ( ? 31): ? ? ? ? ?#03 ?pc 000191ac ?/system/lib/libc.so

? ? I/DEBUG ? ( ? 31): ? ? ? ? ?#04 ?pc 000083ea ?/data/local/ndk-tests/crasher

? ? I/DEBUG ? ( ? 31): ? ? ? ? ?#05 ?pc 00008458 ?/data/local/ndk-tests/crasher

? ? I/DEBUG ? ( ? 31): ? ? ? ? ?#06 ?pc 0000d362 ?/system/lib/libc.so

? ? I/DEBUG ? ( ? 31):

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Into the more readable output:

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变成更可读的输出:

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

? ? Build fingerprint: 'generic/google_sdk/generic/:2.2/FRF91/43546:eng/test-keys'

? ? pid: 351, tid: 351 ?>>> /data/local/ndk-tests/crasher <<<

? ? signal 11 (SIGSEGV), fault addr 0d9f00d8

? ? Stack frame #00 ?pc 0000841e ?/data/local/ndk-tests/crasher : Routine zoo in /tmp/foo/crasher/jni/zoo.c:13

? ? Stack frame #01 ?pc 000083fe ?/data/local/ndk-tests/crasher : Routine bar in /tmp/foo/crasher/jni/bar.c:5

? ? Stack frame #02 ?pc 000083f6 ?/data/local/ndk-tests/crasher : Routine my_comparison in /tmp/foo/crasher/jni/foo.c:9

? ? Stack frame #03 ?pc 000191ac ?/system/lib/libc.so

? ? Stack frame #04 ?pc 000083ea ?/data/local/ndk-tests/crasher : Routine foo in /tmp/foo/crasher/jni/foo.c:14

? ? Stack frame #05 ?pc 00008458 ?/data/local/ndk-tests/crasher : Routine main in /tmp/foo/crasher/jni/main.c:19

? ? Stack frame #06 ?pc 0000d362 ?/system/lib/libc.so

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Usage:

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使用方法:

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To do this, you will first need a directory containing symbolic versions of your application's shared libraries. If you use the NDK build system (i.e. ndk-build), then these are always located under $PROJECT_PATH/obj/local/<ab>, where <ab> stands for your device's ABI (i.e. 'armeabi' by default).

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要做到这一点,你将首先需要一个包含你的应用程序的带符号版本的动态库的目录。如果你使用NDK构建系统(即ndk-build),那么它们总是位于$PROJECT_PATH/obj/local/<ab>目录下,这里<ab>是你的设备的ABI名称(即,默认是armeabi)。

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You can feed the logcat text either as direct input to the program, e.g.:

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你可以把logcat的文本作为直接的输入传给ndk-stack程序,例如:

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? ?adb logcat | $NDK/ndk-stack -sym $PROJECT_PATH/obj/local/armeabi

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Or you can use the -dump option to specify the logcat as an input file, e.g.:

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或者你可以使用-dump开关指定logcat的输入文件,例如:

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? ?adb logcat > /tmp/foo.txt

? ?$NDK/ndk-stack -sym $PROJECT_PATH/obj/local/armeabi -dump foo.txt

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** IMPORTANT **:

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** 重要事项 **:

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? The tool looks for the initial line containing starts in the logcat output, i.e. something that looks like:

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? 这个工具会在logcat的输出内容中寻找包含开始内容的初始行,例如,如下所示的东西

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? ? *** *** *** *** *** *** *** *** *** *** *** *** *** *** *** ***

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? When copy/pasting traces, don't forget this line from the traces, or ndk-stack won't work correctly.

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? 当复制/粘贴追踪内容,不要忘记追踪中的这一行,否则ndk-stack将不能正确工作。

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TODO:

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待完成:

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A future version of 'ndk-stack' will try to launch 'adb logcat' and select the library path automatically. For now, you'll have to do these steps manually.

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未来的ndk-stack版本将尝试启动adb logcat并且自动地选择库目录。现在,你不得不手动地做这些步骤。

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As of now, ndk-stack doesn't handle libraries that don't have debug information in them. It may be useful to try to detect the nearest function entry point to a given PC address (e.g. as in the libc.so example above).

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到现在为止,ndk-stack不会去处理不带调试信息的库。它可能对尝试检测离给定PC地址最近的函数入口点有用(例如,上面例子中的libc.so)

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