{"id":3770,"date":"2022-02-23T21:51:50","date_gmt":"2022-02-23T13:51:50","guid":{"rendered":"https:\/\/blog.coderfan.org\/?p=3770"},"modified":"2022-02-25T20:05:16","modified_gmt":"2022-02-25T12:05:16","slug":"android-native-memory-leak-debug","status":"publish","type":"post","link":"https:\/\/blog.coderfan.org\/en\/android-native-memory-leak-debug.html","title":{"rendered":"Android Native\u5c42\uff08C++\uff09\u5185\u5b58\u6cc4\u9732\u8bca\u65ad"},"content":{"rendered":"
\n
\n \t<\/i> Read Time:<\/span>5 Minute, 14 Second <\/div>\n\n <\/div>\n

\u4e66\u63a5\u4e0a\u7bc7\uff1aAndroid\/Linux\u7cfb\u7edfOOM\u95ee\u9898\u89e3\u6790<\/a>\u3002\u5728\u8fd9\u7bc7\u6587\u7ae0\u4e2d\u7b80\u5355\u5206\u6790\u4e86\u4e00\u4e0bOOM\u4ecb\u7ecd\u4ee5\u53ca\u5982\u4f55\u901a\u8fc7\u65e5\u5fd7\u786e\u5b9a\u5185\u5b58\u6cc4\u6f0f\u7684\u5927\u81f4\u60c5\u51b5\u3002\u65e2\u7136\u6709\u4e86\u95ee\u9898\uff0c\u90a3\u5c31\u8981\u7740\u624b\u601d\u8003\u5982\u4f55\u89e3\u51b3\u95ee\u9898\u3002\u4e00\u5f00\u59cb\u6211\u8fd8\u4ee5\u4e3a\u8fd9\u4e2a\u95ee\u9898\u633a\u7b80\u5355\u7684\uff0c\u7ed3\u679c\u4e1c\u67e5\u67e5\u897f\u67e5\u67e5\u6ca1\u627e\u5230\u4e00\u70b9\u89e3\u9898\u601d\u8def\uff0c\u4e3a\u6b64\u6211\u8fd8\u8dd1\u53bbV\u7ad9\u4e0a\u53d1\u5e16\u54a8\u8be2\uff0c\u5f97\u5230\u7684\u56de\u7b54\u4e5f\u4e0d\u751a\u6ee1\u610f\u3002\u5728\u6b64\u5fc5\u987b\u8981\u5410\u69fd\u4e00\u4e0b\u767e\u5ea6\u7684\u4e2d\u6587\u641c\u7d22\u592a\uff01\u5783\uff01\u573e\uff01\u5566\uff01\u83ab\u5f97\u529e\u6cd5\uff0c\u53ea\u80fd\u81ea\u5df1\u52a8\u624b\uff0c\u4e30\u8863\u8db3\u98df\u54af\u3002<\/p>\n\n\n\n

\u6700\u540e\u8fd8\u662f\u5728Google\u4e0e\u767e\u5ea6\u7684\u53cc\u91cd\u52a0\u6301\u4e0a\uff0c\u521d\u6b65\u6478\u7d22\u5230\u4e86\u89e3\u51b3\u8be5\u95ee\u9898\u7684\u53ef\u9760\u65b9\u6cd5\uff0c\u5728\u8fd9\u91cc\u5462\u505a\u4e00\u4e2a\u8bb0\u5f55\uff0c\u5e0c\u671b\u5bf9\u5927\u5bb6\u89e3\u51b3\u7c7b\u4f3c\u95ee\u9898\u6709\u4e00\u5b9a\u5e2e\u52a9\u3002<\/p>\n\n\n\n

\u65b9\u6cd5\u7b80\u4ecb<\/h3>\n\n\n\n

\u9488\u5bf9\u8be5\u95ee\u9898\u7684\u8bca\u65ad\uff0c\u6211\u4eec\u9700\u8981\u501f\u52a9\u8c37\u6b4c\u5b89\u5353\u5b98\u65b9\u7684\u5de5\u5177\u6765\u8fdb\u884c\u8bca\u65ad\uff0c\u8be5\u5de5\u5177\u662f\u4e00\u4e2aPython\u811a\u672c\u3002\u8be5\u811a\u672c\u5de5\u5177\u4f4d\u4e8e\u8be5\u76ee\u5f55\u4e0b\uff1aplatform\/development\/scripts\u4e0b\uff0c\u811a\u672c\u540d\u79f0\u4e3anative_heapdump_viewer.py\u3002\u9700\u8981\u8bf4\u660e\u7684\u662f\uff0c\u4e0d\u540c\u7684Android\u5e73\u53f0\u7248\u672c\u6539Python\u811a\u672c\u5185\u5bb9\u662f\u6709\u5dee\u5f02\u7684\uff0c\u6211\u8fd9\u91cc\u7684\u5e73\u53f0\u662fAndroid 9\uff0c\u7136\u9e45\u6211\u4f7f\u7528\u7684\u811a\u672c\u662f\u6700\u65b0\u7684\uff08\u81ea\u5df1\u4ece\u6e90\u7801\u91cc\u4e0b\u8f7d\u7684\uff09\u3002<\/p>\n\n\n\n

\u5173\u4e8e\u8be5\u811a\u672c\u7684\u4f7f\u7528\u65b9\u6cd5\uff0c\u53ef\u4ee5\u53c2\u8003Google\u5b98\u65b9\u6e90\u7801\u91cc\u7684\u6ce8\u91ca\uff1a<\/p>\n\n\n\n

Usage:<\/strong><\/p>\n\n\n\n

1. Collect a native heap dump from the device. For example:<\/strong><\/p>\n\n\n\n

   $ adb shell stop<\/p>\n\n\n\n

   $ adb shell setprop libc.debug.malloc.program app_process<\/p>\n\n\n\n

   $ adb shell setprop libc.debug.malloc.options backtrace=64<\/p>\n\n\n\n

   $ adb shell start<\/p>\n\n\n\n

    (launch and use app)<\/p>\n\n\n\n

   $ adb shell am dumpheap -n <pid> \/data\/local\/tmp\/native_heap.txt<\/p>\n\n\n\n

   $ adb pull \/data\/local\/tmp\/native_heap.txt<\/p>\n\n\n\n

2. Run the viewer:<\/strong><\/p>\n\n\n\n

   $ python native_heapdump_viewer.py [options] native_heap.txt<\/p>\n\n\n\n

     [–verbose]: verbose output<\/p>\n\n\n\n

     [–html]: interactive html output<\/p>\n\n\n\n

     [–reverse]: reverse the backtraces (start the tree from the leaves)<\/p>\n\n\n\n

  [–symbols SYMBOL_DIR] SYMBOL_DIR is the directory containing the .so files with symbols.Defaults to $ANDROID_PRODUCT_OUT\/symbols<\/p>\n\n\n\n

This outputs a file with lines of the form:<\/p>\n\n\n\n

5831776  29.09% 100.00%    10532     71b07bc0b0 \/system\/lib64\/libandroid_runtime.so Typeface_createFromArray frameworks\/base\/core\/jni\/android\/graphics\/Typeface.cpp:68<\/p>\n\n\n\n

5831776 is the total number of bytes allocated at this stack frame, which is 29.09% of the total number of bytes allocated and 100.00% of the parent  frame’s bytes allocated. 10532 is the total number of allocations at this stack frame. 71b07bc0b0 is the address of the stack frame.<\/p>\n\n\n\n

“””<\/p>\n\n\n\n

\u9700\u8981\u6ce8\u610f\u7684\u662f\uff0c\u6ce8\u91ca\u4e2d\u4ecb\u7ecd\u7684\u65b9\u6cd5\u662f\u9488\u5bf9\u4e0eAndroid Java\u5c42\u5e94\u7528\u7684\uff0c\u8fd9\u91cc\u7b80\u5355\u4ecb\u7ecd\uff08\u7ffb\u8bd1\uff09\u4e00\u4e0b\u8fd9\u4e2a\u6b65\u9aa4\uff1a<\/p>\n\n\n\n

1\uff09\u505c\u6b62Android Service<\/p>\n\n\n\n

$ adb shell stop<\/p>\n\n\n\n

2\uff09\u8bbe\u5b9amalloc debug\u76d1\u63a7\u7a0b\u5e8f\u4e3aapp\u7a0b\u5e8f\uff08\u57fa\u4e8ezygote\uff09<\/p>\n\n\n\n

$ adb shell setprop libc.debug.malloc.program app_process<\/p>\n\n\n\n

3\uff09\u8bbe\u7f6ebacktrace\u7684\u6700\u5927\u6df1\u5ea6<\/p>\n\n\n\n

$ adb shell setprop libc.debug.malloc.options backtrace=64<\/p>\n\n\n\n

4\uff09\u91cd\u65b0\u542f\u52a8Android Service<\/p>\n\n\n\n

$ adb shell start<\/p>\n\n\n\n

5\uff09\u5f00\u59cb\u542f\u52a8\u4f60\u7684\u5e94\u7528<\/p>\n\n\n\n

(launch and use app)<\/p>\n\n\n\n

6\uff09dump\u7279\u5b9apid\u4e0b\u7684\u5806\u6808\u60c5\u51b5\uff0c\u8fd9\u90e8\u5206\u662fmalloc_debug\u5f00\u542f\u540e\u81ea\u52a8\u751f\u6210\u7684<\/p>\n\n\n\n

$ adb shell am dumpheap -n <pid> \/data\/local\/tmp\/native_heap.txt<\/p>\n\n\n\n

7\uff09\u62c9\u53d6\u51fa\u751f\u6210\u7684\u5806\u6808\u60c5\u51b5<\/p>\n\n\n\n

$ adb pull \/data\/local\/tmp\/native_heap.txt<\/p>\n\n\n\n

\u5c06native_heap.txt\u6587\u4ef6\u4e0a\u4f20\u5230\u7f16\u8bd1\u5e73\u53f0\uff0c\u901a\u8fc7native_heapdump_viewer.py\u811a\u672c\u89e3\u6790\u8be5\u6587\u4ef6\u3002\u8fd9\u4e2a\u811a\u672c\u7684\u5927\u81f4\u539f\u7406\u5462\u5176\u5b9e\u5c31\u662f\u5229\u7528addr2line\u5c06Sysmbol\u8868\u4e0e\u6211\u4eecdunp\u4e0b\u6765\u7684\u5730\u5740\u8fdb\u884cmap\u6bd4\u5bf9\uff0c\u540c\u65f6\u5462\u8ba1\u7b97\u51fa\u6bcf\u4e2aso\u5e93\u6240\u5206\u914d\u7684\u5185\u5b58\u8d44\u6e90\u3002<\/p>\n\n\n\n

\u4f7f\u7528\u4e0a\u8ff0\u65b9\u6cd5\u5b9e\u9645\u662f\u4f7f\u7528Malloc Debug\u7684\u65b9\u6cd5\u6765\u8fdb\u884c\u8bca\u65ad\u7684\uff0c\u5b98\u65b9\u7684\u8be6\u7ec6\u8bf4\u660e\u8bf7\u53c2\u8003\u5b98\u65b9\u6587\u6863https:\/\/android.googlesource.com\/platform\/bionic\/+\/master\/libc\/malloc_debug\/README.md<\/a><\/p>\n\n\n\n

Malloc Debug\u53ef\u7528\u4e8e\u8bca\u65ad\u5185\u5b58\u4e92\u8e29\u3001\u5185\u5b58\u6cc4\u9732\u7b49\u95ee\u9898\u3002\u5b83\u7684\u539f\u7406\u662f\u901a\u8fc7\u7279\u5b9a\u5c5e\u6027\u5f00\u542f\u540e\uff0c\u7cfb\u7edf\u5185\u90e8\u4f1a\u4ee5\u989d\u5916\u5c01\u88c5\u540e\u7684\u51fd\u6570\u66ff\u4ee3\u4ee5\u4e0b\u51fd\u6570\uff1a<\/p>\n\n\n\n

  1. malloc<\/li>
  2. free<\/li>
  3. calloc<\/li>
  4. realloc<\/li>
  5. posix_memalign<\/li>
  6. memalign<\/li>
  7. aligned_alloc<\/li>
  8. malloc_usable_size<\/li><\/ol>\n\n\n\n

    \u53c2\u6570\u89e3\u8bfb<\/h3>\n\n\n\n

    \u5f00\u542fMalloc Debug\u65f6\u53ef\u4ee5\u901a\u8fc7\u4e0d\u540c\u7684\u53c2\u6570\u6765\u63a7\u5236\u5176\u884c\u4e3a\uff0c\u4e00\u4e9b\u5e38\u7528\u7684\u53c2\u6570\u5305\u62ec\uff1a<\/p>\n\n\n\n

    backtrace[=MAX_FRAMES]<\/strong>\uff1a<\/strong><\/p>\n\n\n\n

    \u901a\u8fc7\u8bbe\u7f6e\u8be5\u9009\u9879\uff0c\u53ef\u4ee5\u6293\u53d6\u6bcf\u6b21\u7533\u8bf7\u5185\u5b58\u65f6\u7684backtrace\uff0c\u5982\u679cbacktrace\u672a\u8bbe\u5b9a\u6570\u503c\uff0c\u5219\u4ee5\u9ed8\u8ba4\u503c16\u8fdb\u884c\u66ff\u4ee3\uff0c\u8be5\u6570\u503c\u6700\u5927\u4e3a256\u3002\u9700\u8981\u8bf4\u660e\u7684\u662f\u8fd9\u4e2a\u503c\u8d8a\u5927\uff0c\u5bf9\u7cfb\u7edf\u5f71\u54cd\u8d8a\u5927\uff0c\u4e0d\u5408\u9002\u7684\u503c\u4f1a\u5bfc\u81f4\u7cfb\u7edf\u5361\u987f\u3002\u5728Android P\u53ca\u4e4b\u540e\uff0c\u6211\u4eec\u53d1\u9001SIGRTMAX \u2013 17\u4f1a\u4f7f\u80fddumpheap\uff0c\u8fd9\u4e2a\u4fe1\u53f7\u5728\u5927\u591a\u6570\u5b89\u5353\u7cfb\u7edf\u4e2d\u662f47.\u751f\u6210\u7684\u6570\u636e\u9ed8\u8ba4\u4e3a\/data\/local\/tmp\/backtrace_heap.PID.txt.\uff08PID\u4e3a\u76d1\u63a7\u7a0b\u5e8f\u7684\u8fdb\u7a0b\u53f7\uff09\u5f53\u6211\u4eec\u53d1\u73b0\u53d1\u751f\u5185\u5b58\u5f02\u5e38\u65f6\u5c31\u53ef\u4ee5\u53d1\u9001\u8be5\u4fe1\u53f7\u89e6\u53d1dump\u884c\u4e3a.<\/p>\n\n\n\n

    backtrace_dump_on_exit:<\/strong><\/p>\n\n\n\n

    \u901a\u8fc7\u8bbe\u7f6e\u8be5\u9009\u9879\uff0c\u5728backtrace\u9009\u9879\u5df2\u5f00\u542f\u7684\u60c5\u51b5\u4e0b\uff0c\u4f1a\u81ea\u52a8\u5728\u7a0b\u5e8f\u9000\u51fa\u65f6\u6293\u53d6heap\u4fe1\u606f\uff0c\u9ed8\u8ba4\u751f\u6210\u7684\u6587\u4ef6\u4e3a\uff1adata\/local\/tmp\/backtrace_heap.PID.exit.txt.\uff08PID\u4e3a\u9000\u51fa\u8fdb\u7a0b\u7684\u8fdb\u7a0b\u53f7\uff09<\/p>\n\n\n\n

    backtrace_dump_prefix<\/strong>\uff1a<\/p>\n\n\n\n

    \u901a\u8fc7\u8bbe\u7f6e\u8be5\u9009\u9879\uff0c\u53ef\u4ee5\u9650\u5b9a\u751f\u6210\u7684dump\u6587\u4ef6\u7684\u8def\u5f84<\/p>\n\n\n\n

    leak_track<\/strong><\/p>\n\n\n\n

    \u901a\u8fc7\u8bbe\u7f6e\u8be5\u9009\u9879\uff0c\u53ef\u4ee5\u89c2\u5bdf\u5230\u6240\u6709\u8fd8\u672a\u91ca\u653e\u7684\u52a8\u6001\u5185\u5b58\uff0c\u8003\u8651\u5230\u6709\u4e9b\u7a0b\u5e8f\u7ed3\u675f\u5e76\u4e0d\u4f1a\u81ea\u52a8\u91ca\u653e\u6240\u6709\u7684\u8d44\u6e90\uff0c\u5728\u6392\u67e5\u5185\u5b58\u6cc4\u9732\u95ee\u9898\u65f6\u5f00\u542f\u8be5\u9009\u9879\u662f\u5f88\u6709\u5fc5\u8981\u7684\u3002<\/p>\n\n\n\n

    record_allocs<\/strong><\/p>\n\n\n\n

    \u8bbe\u7f6e\u8be5\u9009\u9879\u53ef\u4ee5\u8ffd\u8e2a\u6bcf\u4e2a\u7ebf\u7a0b\u7684\u5185\u5b58\u7533\u8bf7\u60c5\u51b5\u3002\u9700\u8981\u6ce8\u610f\u7684\u662f\u8be5\u9009\u9879\u5728Android O\u4e4b\u540e\u7684\u7248\u672c\u624d\u4f1a\u751f\u6548\u3002<\/p>\n\n\n\n

    Verbose<\/strong><\/p>\n\n\n\n

    \u8bbe\u7f6e\u8be5\u9009\u9879\u4f1a\u6253\u5370\u51fa\u66f4\u8be6\u7ec6\u7684\u65e5\u5fd7\u4fe1\u606f\u3002<\/p>\n\n\n\n

    \u4f7f\u7528\u793a\u4f8b<\/h3>\n\n\n\n

    \u5bf9\u4e8e\u5e73\u53f0\/Native\u539f\u751f\u5f00\u53d1\u8005\uff1a<\/strong><\/p>\n\n\n\n

    \u9488\u5bf9\u5355\u4e2a\u8fdb\u7a0b\uff08\u4f18\u5148\u7ea7\u8f83\u9ad8\uff0c\u4e0d\u4f1a\u88ablow memory killer\u6740\u6389<\/strong>\uff09\uff1asetprop libc.debug.malloc.options “backtrace=5 leak_track  backtrace_dump_prefix=\/data\/heapdump\/”<\/p>\n\n\n\n

    \u53d1\u73b0\u5185\u5b58\u6cc4\u9732\u65f6\u901a\u8fc7Kill -s 47 Pid\u53d1\u9001SIGRTMAX \u2013 17\u89e6\u53d1dump\u884c\u4e3a\u3002<\/p>\n\n\n\n

    \u9488\u5bf9\u5355\u4e2a\u8fdb\u7a0b\uff08\u4f18\u5148\u7ea7\u8f83\u4f4e,\u4f1a\u88ablow memory killer\u6740\u6389\uff09<\/strong>\uff1a<\/p>\n\n\n\n

    setprop libc.debug.malloc.options “backtrace=5 backtrace_dump_on_exit<\/strong> leak_track  backtrace_dump_prefix=\/data\/heapdump\/”<\/p>\n\n\n\n

    \u8fd9\u6837\u8bbe\u7f6e\u65e0\u8bba\u662f\u5426\u88abKill\u6389\u90fd\u4f1adump\u5230\u76f8\u5173\u4fe1\u606f\uff0c\u5982\u679c\u5728\u4f60\u8fd8\u6ca1\u6765\u5f97\u53ca\u53d1\u9001\u4fe1\u53f7\u524d\u8fdb\u7a0b\u5df2\u7ecf\u88abKill\uff0c\u540c\u6837\u53ef\u4ee5\u83b7\u5f97backtrace\u4fe1\u606f\u3002<\/p>\n\n\n\n

    \u5bf9\u4e8eJava App\u5f00\u53d1\u8005\uff1a<\/strong><\/p>\n\n\n\n

    \u5bf9\u4e8eJava App\u5f00\u53d1\u8005\uff0c\u9700\u8981\u67e5\u770bNDK\u5f00\u53d1\u6587\u6863\u4e2d\u5173\u4e8ewarp.sh\u7684\u8bf4\u660e\uff0c\u6587\u6863\u94fe\u63a5\uff1ahttps:\/\/developer.android.com\/ndk\/guides\/wrap-script.html<\/a>\u3002<\/p>\n\n\n\n

    \u5982\u679c\u4f60\u7684\u8bbe\u5907\u62e5\u6709root\u6743\u9650\uff0c\u4e5f\u53ef\u4ee5\u901a\u8fc7\u5c5e\u6027\u8bbe\u7f6e\u7684\u5f62\u5f0f\u8fdb\u884c\u8bbe\u5b9a\uff0c\u793a\u4f8b\uff1a<\/p>\n\n\n\n

    adb shell setprop wrap.com.google.android.googlequicksearchbox ‘”LIBC_DEBUG_MALLOC_OPTIONS=backtrace logwrapper”‘<\/p>\n\n\n\n

    adb shell am force-stop com.google.android.googlequicksearchbox<\/p>\n\n\n\n

    \u7531\u4e8e\u6211\u8fd9\u91cc\u51fa\u73b0\u95ee\u9898\u7684\u8fdb\u7a0b\u662fNative service\uff0c\u4f18\u5148\u7ea7\u8f83\u9ad8\uff0c\u5e76\u4e14\u6709\u81ea\u5df1\u72ec\u7acb\u7684rc\u542f\u52a8\u6587\u4ef6\u3002\u6240\u4ee5\u6211\u4eec\u91c7\u7528\u5728rc\u542f\u52a8\u6587\u4ef6\u4e2d\u8fdb\u884cmalloc debug\u7684\u8bbe\u7f6e\uff0c\u8fd9\u6837\u5f53\u6211\u4eec\u8fdb\u7a0b\u5f00\u59cb\u542f\u52a8\u5c31\u80fd\u5f00\u59cb\u8bb0\u5f55backtrace\u4fe1\u606f\uff0c\u6dfb\u52a0\u5185\u5bb9\u5982\u4e0b\uff1a<\/p>\n\n\n\n

    #data\u76ee\u5f55\u52a0\u8f7d\u5b8c\u6210<\/p>\n\n\n\n

    on post-fs-data<\/p>\n\n\n\n

    #\u521b\u5efa\u8f93\u51fa\u76ee\u5f55\/data\/memorycheck<\/p>\n\n\n\n

    mkdir \/data\/memorycheck<\/p>\n\n\n\n

    #\u8bbe\u5b9amalloc debug\u7684\u5c5e\u6027<\/p>\n\n\n\n

    setprop libc.debug.malloc.options “backtrace=4 leak_track backtrace_dump_prefix=\/data\/memorycheck”<\/p>\n\n\n\n

    \u901a\u5e38\u6211\u4eec\u5728\u6d4b\u8bd5\u65f6\u8fd8\u9700\u8981\u989d\u5916\u7684\u624b\u6bb5\u6765\u5224\u65ad\u662f\u5426\u53d1\u751f\u4e86\u5185\u5b58\u6cc4\u9732\uff0c\u8fd9\u91cc\u63d0\u4f9b\u4e24\u4e2a\u65b9\u6cd5\uff1a<\/p>\n\n\n\n

    1.\u901a\u8fc7top\u547d\u4ee4\uff0c\u901a\u8fc7RES\u8fd9\u4e00\u5217\u7684\u6570\u636e\u6765\u89c2\u5bdf\u662f\u5426\u53d1\u751f\u5185\u5b58\u6cc4\u9732,\u5982\u56fe\u6240\u793a\uff1a<\/p>\n\n\n\n

    \"\"<\/figure>\n\n\n\n

    2.\u901a\u8fc7adb shell dumpsys meminfo\u6765\u89c2\u5bdf\u662f\u5426\u53d1\u751f\u5185\u5b58\u6cc4\u9732<\/p>\n\n\n\n

    \u5728\u6d4b\u8bd5\u65f6\u901a\u8fc7top\u547d\u4ee4\u53d1\u73b0\u51fa\u73b0\u4e86\u5185\u5b58\u73b0\u8c61\uff0c\u901a\u8fc7\u53d1\u9001Kill 47\u4fe1\u53f7\u89e6\u53d1\u4e86dump\uff0c\u5728\/data\/memorycheck\/ backtrace_heap.PID.txt(PID\u662f\u6211\u6d4b\u8bd5\u5185\u5b58\u6cc4\u9732\u65f6\u95ee\u9898\u8fdb\u7a0b\u7684PID)\uff0c\u5176\u5927\u4f53\u5185\u5bb9\u5982\u4e0b\uff1a<\/p>\n\n\n\n

    \"\"<\/figure>\n\n\n\n

    \u5f53\u6211\u770b\u5230\u8fd9\u8fd9\u4e2a\u6570\u636e\u65f6\u8fd8\u662f\u4e00\u8138\u61f5\u903c\u7684\uff0c\u8fd9\u90fd\u5565\u8ddf\u5565\u3002\u540e\u6765\u4e86\u89e3\u5230\u5b98\u65b9\u5176\u5b9e\u6709\u63d0\u4f9b\u89e3\u8bfb\u65b9\u6cd5\uff0c\u4f46\u7531\u4e8e\u592a\u957f\u6211\u61d2\u5f97\u770b\uff08\u5168\u82f1\u6587\uff09\uff0c\u9664\u6b64\u8fd8\u4e86\u89e3\u5230\u5b98\u65b9\u5176\u5b9e\u63d0\u4f9b\u4e86\u811a\u672c\u5c06\u5176\u8fdb\u884c\u8fdb\u4e00\u6b65\u8f6c\u6362\uff0c\u65b9\u4fbf\u7406\u89e3\u3002\u6240\u4ee5\u5728\u8fd9\u91cc\u6211\u4eec\u5c06\u5176\u7528\u5b98\u65b9\u63d0\u4f9b\u7684\u811a\u672c\u8fdb\u884c\u8f6c\u6362\u3002\u8f6c\u6362\u547d\u4ee4\u5982\u4e0b\uff1a<\/p>\n\n\n\n

    Python2 native_heapdump_viewer.py –symbols .\/out\/target\/product\/spm8666p1_64\/symbols  –reverse backtrace_heap.PID.txt > backtrace_heap.PID.txt.heapout<\/p>\n\n\n\n

    \u8f6c\u6362\u540e\u6211\u4eec\u53ef\u4ee5\u770b\u5230\u8fd9\u6837\u4e00\u4efd\u5185\u5bb9\uff1a<\/p>\n\n\n\n

    \"\"<\/figure>\n\n\n\n

    \u5982\u4f55\u89e3\u8bfb\u8fd9\u4efd\u5185\u5bb9\u5462?\u5927\u4f53\u4e0a\u53ef\u4ee5\u770b\u5230\u4e00\u4e9b\u5206\u914d\u7684\u5185\u5b58\u5b57\u8282\u6570\uff0c\u5bf9\u5e94\u7684so\u5e93\u751a\u81f3\u8fd8\u5305\u62ec\u5bf9\u5e94\u7684\u51fd\u6570\u4e0e\u884c\u6570\uff0c\u5b9e\u9645\u4e0a\u5b98\u65b9\u811a\u672c\u91cc\u5176\u5b9e\u6709\u76f8\u5173\u7684\u89e3\u8bfb\u8bf4\u660e\u3002<\/p>\n\n\n\n

    This outputs a file with lines of the form:<\/p>\n\n\n\n

    5831776  29.09% 100.00%    10532     71b07bc0b0 \/system\/lib64\/libandroid_runtime.so Typeface_createFromArray frameworks\/base\/core\/jni\/android\/graphics\/Typeface.cpp:68<\/p>\n\n\n\n

    5831776 is the total number of bytes allocated at this stack frame, which is 29.09% of the total number of bytes allocated and 100.00% of the parent  frame’s bytes allocated. 10532 is the total number of allocations at this stack frame. 71b07bc0b0 is the address of the stack frame.<\/p>\n\n\n\n

    \u5982\u679c\u4f60\u8981\u6211\u518d\u7ffb\u8bd1\u4e00\u4e0b\uff0c\u6211\u53ea\u80fd\u8bf4\uff0c\u7b49\u4e0b\u6b21\uff0c\u4e0b\u6b21\u4e00\u5b9a\uff01\u5176\u5b9e\u6211\u5230\u73b0\u5728\u4e5f\u8fd8\u6ca1\u6709\u5b8c\u5168\u7406\u89e3\uff0c\u4f46\u662f\u53ef\u4ee5\u660e\u663e\u770b\u5230\u51fd\u6570\u8c03\u7528\u524d\u540e\u7684\u4e00\u4e2a\u8d44\u6e90\u53d8\u5316\u60c5\u51b5\uff0c\u8fd9\u5bf9\u4e8e\u6211\u4eec\u89e3\u51b3\u95ee\u9898\u5df2\u7ecf\u6709\u5f88\u5927\u5e2e\u52a9\u5566\u3002PS:\u5982\u679c\u6709\u54ea\u4f4d\u5927\u4f6c\u80fd\u8be6\u7ec6\u7ed9\u6211\u89e3\u91ca\u4e00\u4e0b\uff0c\u6211\u4f1a\u975e\u5e38\u611f\u6fc0\u7684\u3002<\/s><\/em><\/p>\n\n\n\n

    \u9664\u6b64\u4e4b\u5916\uff0c\u6211\u4eec\u8fd8\u9700\u8981\u6293\u53d6\u4e00\u4efd\u672a\u53d1\u751f\u5185\u5b58\u6cc4\u6f0f\u65f6\u7684dump\u6587\u4ef6\uff0c\u540c\u6837\u5229\u7528\u811a\u672c\u8fdb\u884c\u8f6c\u6362\u3002\u901a\u8fc7\u6bd4\u5bf9\u672a\u53d1\u751f\u5185\u5b58\u6cc4\u6f0f\u65f6\u7684so\u5e93\u8d44\u6e90\u5360\u7528\u60c5\u51b5\u4ee5\u53ca\u5bf9\u5e94\u7684\u51fd\u6570\uff0c\u5927\u81f4\u5b9a\u4f4d\u5230\u5177\u4f53\u7684\u51fd\u6570\u4f4d\u7f6e\uff0c\u63a5\u4e0b\u6765\u5c31\u662f\u5ba1\u89c6\u4ee3\u7801\u518d\u505a\u4fee\u6539\u9a8c\u8bc1\u5566\uff01<\/p>\n\n\n\n

    \u4e00\u756a\u4fee\u6539\u540e\u4ee3\u7801\u91cd\u65b0\u4e0a\u7ebf\uff0c\u76ee\u524d\u6765\u770b\uff0c\u6211\u7684\u4fee\u6539\u8fd8\u662f\u6709\u6548\u7684\uff0c\u6b63\u6301\u7eed\u6d4b\u8bd5\u4e2d…..<\/p>\n\n\n\n

    \u8fd9\u91cc\u9644\u5e26\u4e00\u4e9b\u989d\u5916\u7684\u5173\u4e8e\u5185\u5b58\u8bca\u65ad\u7684\u4e00\u4e9b\u5c0f\u5de5\u5177\u4e0e\u5c0f\u77e5\u8bc6\uff0cAndroid\u5e73\u53f0\u81ea\u8eab\u8fd8\u6709\u4e00\u4e9b\u5de5\u5177\uff0c\u5982showmap\u3001procrank\u5de5\u5177\uff0c\u7f16\u8bd1\u540e\u5b58\u5728\u4e8e\u4ee5\u4e0b\u76ee\u5f55\uff1asystem\/xbin\/ showmap\u4e0esystem\/xbin\/procrank<\/p>\n\n\n\n

    showmap\u4f7f\u7528\u65b9\u6cd5\uff1a<\/strong><\/p>\n\n\n\n

    spm8666p1_64_car:\/ # showmap –help<\/p>\n\n\n\n

    unrecognized argument: –help<\/p>\n\n\n\n

    showmap [-t] [-v] [-c] [-q] <pid><\/p>\n\n\n\n

            -t = terse (show only items with private pages)<\/p>\n\n\n\n

            -v = verbose (don’t coalesce maps with the same name)<\/p>\n\n\n\n

            -a = addresses (show virtual memory map)<\/p>\n\n\n\n

            -q = quiet (don’t show error if map could not be read)<\/p>\n\n\n\n

    showmap\u53ef\u4ee5\u5c06\u7279\u5b9a\u8fdb\u7a0b\u4e0b\u7684\u5404\u4e2aso\u5e93\u7684\u8d44\u6e90\u5360\u7528\u60c5\u51b5\u8fdb\u884c\u67e5\u8be2\u663e\u793a\uff0c\u8fd9\u5bf9\u6392\u67e5\u5185\u5b58\u6cc4\u9732\u95ee\u9898\u8fd8\u662f\u6709\u5f88\u5927\u5e2e\u52a9\u7684\uff0c\u5982\u4e0b\u56fe\u6240\u793a\uff1a<\/p>\n\n\n\n

    \"\"<\/figure>\n\n\n\n

    Procrank\u4f7f\u7528\u65b9\u6cd5:<\/strong><\/p>\n\n\n\n

    spm8666p1_64_car:\/ # procrank –help<\/p>\n\n\n\n

    Invalid argument “–help”.<\/p>\n\n\n\n

    Usage: procrank [ -W ] [ -v | -r | -p | -u | -s | -h ]<\/p>\n\n\n\n

        -v  Sort by VSS.<\/p>\n\n\n\n

        -r  Sort by RSS.<\/p>\n\n\n\n

        -p  Sort by PSS.<\/p>\n\n\n\n

        -u  Sort by USS.<\/p>\n\n\n\n

        -s  Sort by swap.(Default sort order is PSS.)<\/p>\n\n\n\n

        -R  Reverse sort order (default is descending).<\/p>\n\n\n\n

        -c  Only show cached (storage backed) pages<\/p>\n\n\n\n

        -C  Only show non-cached (ram\/swap backed) pages<\/p>\n\n\n\n

        -k  Only show pages collapsed by KSM<\/p>\n\n\n\n

        -w  Display statistics for working set only.<\/p>\n\n\n\n

        -W  Reset working set of all processes.<\/p>\n\n\n\n

        -o  Show and sort by oom score against lowmemorykiller thresholds.<\/p>\n\n\n\n

    -h  Display this help screen.<\/p>\n\n\n\n

    \"\"<\/figure>\n\n\n\n

    \u4f7f\u7528 procrank \u5de5\u5177\u53ef\u4ee5\u5feb\u901f\u786e\u5b9a\u5185\u5b58\u6cc4\u6f0f\u7684\u5177\u4f53\u60c5\u51b5\uff0c\u4e3a\u540e\u7eed\u6392\u67e5\u63d0\u4f9b\u57fa\u7840\u601d\u8def\uff08\u56e0\u4e3a\u80fd\u770b\u5230\u8be6\u7ec6\u7684Vss\/Rss\/Pss\/Uss\u7b49\u4fe1\u606f\uff09\u3002<\/p>\n\n\n\n

    \u62d3\u5c55\u77e5\u8bc6<\/h3>\n\n\n\n

    \u5173\u4e8eAndroid\u7cfb\u7edf\u5173\u4e8e\u5185\u5b58\u8bca\u65ad\u7684\u66f4\u591a\u4fe1\u606f\uff0c\u8bf7\u53c2\u8003Android\u5b98\u65b9\u6587\u6863\uff1ahttps:\/\/source.android.com\/devices\/tech\/debug\/native-memory\uff0c\u771f\u7684\u771f\u7684\u975e\u5e38\u6709\u7528\uff01<\/p>\n\n\n\n

    \u6b64\u5916\uff0c\u5bf9\u4e8e\u5185\u5b58\u6cc4\u6f0f\u7684\u6d4b\u8bd5\uff0c\u6211\u8fd9\u91cc\u5199\u4e86\u4e00\u4e2a\u811a\u672c\uff0c\u53ef\u4ee5\u65b9\u4fbf\u5730\u53bb\u76d1\u63a7\u6d4b\u8bd5\u8fc7\u7a0b\u4e2d\u7684\u5f02\u5e38\uff0c\u5728\u8fd9\u91cc\u4e5f\u5c06\u811a\u672c\u5206\u4eab\u51fa\u6765\uff0c\u6709\u9700\u8981\u7684\u670b\u53cb\u901a\u8fc7Github\u81ea\u53d6\uff0c\u4ed3\u5e93\u5730\u5740\uff1ahttps:\/\/github.com\/FranzKafkaYu\/Bash_Script.git<\/p>\n\n\n\n

    \"\"<\/figure>\n\n\n\n

    \u5173\u4e8e\u811a\u672c\u7684\u4f7f\u7528\u8bf4\u660e\u8bf7\u67e5\u770b\u8bf4Readme\u6587\u6863\u3002<\/p>\n\n\n\n

    \u4ee5\u4e0a\u5c31\u662f\u6574\u7bc7\u535a\u5ba2\u7684\u5185\u5bb9\u5566\uff0c\u7531\u4e8e\u65f6\u95f4\u6709\u9650\uff0c\u8fd8\u6709\u5f88\u591a\u5185\u5bb9\u5176\u5b9e\u6ca1\u6709\u603b\u7ed3\u653e\u51fa\u6765\uff0c\u540e\u9762\u6709\u65f6\u95f4\u518d\u8865\u5145\u5427\u3002\u6211\u662fCoderfan\uff0c\u6211\u4eec\u4e0b\u6b21\u518d\u89c1~<\/p>\n

    \n
    \n \n
    \n \n \"Happy\"\n <\/a>\n
    \n Happy <\/div>\n
    \n 4<\/span>\n \n 100<\/span> %<\/span>\n <\/div>\n <\/div>\n\n
    \n \n \"Sad\"\n <\/a>\n
    \n Sad <\/div>\n
    \n 0<\/span>\n 0<\/span> %<\/span>\n <\/div>\n <\/div>\n\n
    \n \n \"Excited\"\n <\/a>\n
    \n Excited <\/div>\n
    \n 0<\/span>\n 0<\/span> %<\/span>\n <\/div>\n <\/div>\n\n
    \n \n \"Sleepy\"\n <\/a>\n
    \n Sleepy <\/div>\n
    \n 0<\/span>\n \n 0<\/span> %<\/span>\n <\/div>\n <\/div>\n\n
    \n \n \"Angry\"\n <\/a>\n
    Angry<\/div>\n
    \n 0<\/span>\n 0<\/span> %<\/span>\n \n <\/div>\n <\/div>\n\n
    \n \n \"Surprise\"\n <\/a>\n
    Surprise<\/div>\n
    \n 0<\/span>\n 0<\/span> %<\/span>\n <\/div>\n <\/div>\n\n <\/div>\n <\/div>","protected":false},"excerpt":{"rendered":"

    \u5982\u4f55\u8bca\u65adAndroid Native\u5185\u5b58\u6cc4\u6f0f\uff0c\u4e00\u8d77\u5b66\u8d77\u6765\u5427~<\/p>","protected":false},"author":1,"featured_media":3777,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"_editorskit_title_hidden":false,"_editorskit_reading_time":3,"_editorskit_is_block_options_detached":false,"_editorskit_block_options_position":"{}","om_disable_all_campaigns":false,"_monsterinsights_skip_tracking":false,"_monsterinsights_sitenote_active":false,"_monsterinsights_sitenote_note":"","_monsterinsights_sitenote_category":0,"footnotes":""},"categories":[18],"tags":[46,21],"class_list":["post-3770","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-operating-system","tag-android","tag-c-2"],"blocksy_meta":{"styles_descriptor":{"styles":{"desktop":"","tablet":"","mobile":""},"google_fonts":[]}},"aioseo_notices":[],"featured_image_urls":{"full":["https:\/\/blog.coderfan.org\/wp-content\/uploads\/2022\/02\/android.jpg",512,269,false],"thumbnail":["https:\/\/blog.coderfan.org\/wp-content\/uploads\/2022\/02\/android-150x150.jpg",150,150,true],"medium":["https:\/\/blog.coderfan.org\/wp-content\/uploads\/2022\/02\/android-300x158.jpg",300,158,true],"medium_large":["https:\/\/blog.coderfan.org\/wp-content\/uploads\/2022\/02\/android.jpg",512,269,false],"large":["https:\/\/blog.coderfan.org\/wp-content\/uploads\/2022\/02\/android.jpg",512,269,false],"1536x1536":["https:\/\/blog.coderfan.org\/wp-content\/uploads\/2022\/02\/android.jpg",512,269,false],"2048x2048":["https:\/\/blog.coderfan.org\/wp-content\/uploads\/2022\/02\/android.jpg",512,269,false],"trp-custom-language-flag":["https:\/\/blog.coderfan.org\/wp-content\/uploads\/2022\/02\/android-18x9.jpg",18,9,true]},"post_excerpt_stackable":"

    \u5982\u4f55\u8bca\u65adAndroid Native\u5185\u5b58\u6cc4\u6f0f\uff0c\u4e00\u8d77\u5b66\u8d77\u6765\u5427~<\/p>\n","category_list":"\u64cd\u4f5c\u7cfb\u7edf<\/a>","author_info":{"name":"FranzKafka95","url":"https:\/\/blog.coderfan.org\/en\/author\/yushenglonely95"},"comments_num":"0 comments","featured_image_urls_v2":{"full":["https:\/\/blog.coderfan.org\/wp-content\/uploads\/2022\/02\/android.jpg",512,269,false],"thumbnail":["https:\/\/blog.coderfan.org\/wp-content\/uploads\/2022\/02\/android-150x150.jpg",150,150,true],"medium":["https:\/\/blog.coderfan.org\/wp-content\/uploads\/2022\/02\/android-300x158.jpg",300,158,true],"medium_large":["https:\/\/blog.coderfan.org\/wp-content\/uploads\/2022\/02\/android.jpg",512,269,false],"large":["https:\/\/blog.coderfan.org\/wp-content\/uploads\/2022\/02\/android.jpg",512,269,false],"1536x1536":["https:\/\/blog.coderfan.org\/wp-content\/uploads\/2022\/02\/android.jpg",512,269,false],"2048x2048":["https:\/\/blog.coderfan.org\/wp-content\/uploads\/2022\/02\/android.jpg",512,269,false],"trp-custom-language-flag":["https:\/\/blog.coderfan.org\/wp-content\/uploads\/2022\/02\/android-18x9.jpg",18,9,true]},"post_excerpt_stackable_v2":"

    \u5982\u4f55\u8bca\u65adAndroid Native\u5185\u5b58\u6cc4\u6f0f\uff0c\u4e00\u8d77\u5b66\u8d77\u6765\u5427~<\/p>\n","category_list_v2":"\u64cd\u4f5c\u7cfb\u7edf<\/a>","author_info_v2":{"name":"FranzKafka95","url":"https:\/\/blog.coderfan.org\/en\/author\/yushenglonely95"},"comments_num_v2":"0 comments","_links":{"self":[{"href":"https:\/\/blog.coderfan.org\/en\/wp-json\/wp\/v2\/posts\/3770","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/blog.coderfan.org\/en\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/blog.coderfan.org\/en\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/blog.coderfan.org\/en\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/blog.coderfan.org\/en\/wp-json\/wp\/v2\/comments?post=3770"}],"version-history":[{"count":9,"href":"https:\/\/blog.coderfan.org\/en\/wp-json\/wp\/v2\/posts\/3770\/revisions"}],"predecessor-version":[{"id":3792,"href":"https:\/\/blog.coderfan.org\/en\/wp-json\/wp\/v2\/posts\/3770\/revisions\/3792"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/blog.coderfan.org\/en\/wp-json\/wp\/v2\/media\/3777"}],"wp:attachment":[{"href":"https:\/\/blog.coderfan.org\/en\/wp-json\/wp\/v2\/media?parent=3770"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/blog.coderfan.org\/en\/wp-json\/wp\/v2\/categories?post=3770"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/blog.coderfan.org\/en\/wp-json\/wp\/v2\/tags?post=3770"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}