0

要查找我的应用程序的本机 C 代码的内存泄漏，我运行以下命令

adb shell dumpsys meminfo --unreachable $(adb shell pidof com.mycompany.myapp)

我得到以下输出

6 bytes unreachable at ee1551b0
   and 654 similar unreachable bytes in 109 allocations
   contents:
   ee1551b0: 31 2e 30 2e 30 00                               1.0.0.
          #00  pc 000421e4  /apex/com.android.runtime/lib/bionic/libc.so (malloc +68)
          #01  pc 00126670  /data/app/~~XX==/com.mycompany.myapp-W6-xx==/lib/x86/mylib.so (myCfunction7 +80)
          #02  pc 0011d2b9  /data/app/~~XX==/com.mycompany.myapp-W6-xx==/lib/x86/mylib.so
          #03  pc 0011d025  /data/app/~~XX==/com.mycompany.myapp-W6-xx==/lib/x86/mylib.so (myCfunction6 +165)
          #04  pc 0011e82c  /data/app/~~XX==/com.mycompany.myapp-W6-xx==/lib/x86/mylib.so (myCfunction5 +892)
          #05  pc 00120ea7  /data/app/~~XX==/com.mycompany.myapp-W6-xx==/lib/x86/mylib.so
          #06  pc 0012091c  /data/app/~~XX==/com.mycompany.myapp-W6-xx==/lib/x86/mylib.so
          #07  pc 00120144  /data/app/~~XX==/com.mycompany.myapp-W6-xx==/lib/x86/mylib.so
          #08  pc 0011eebe  /data/app/~~XX==/com.mycompany.myapp-W6-xx==/lib/x86/mylib.so
          #09  pc 0011e6d4  /data/app/~~XX==/com.mycompany.myapp-W6-xx==/lib/x86/mylib.so (myCfunction4 +548)
          #10  pc 00121924  /data/app/~~XX==/com.mycompany.myapp-W6-xx==/lib/x86/mylib.so (myCfunction3 +68)
          #11  pc 00121743  /data/app/~~XX==/com.mycompany.myapp-W6-xx==/lib/x86/mylib.so (myCfunction2 +99)
          #12  pc 001221c9  /data/app/~~XX==/com.mycompany.myapp-W6-xx==/lib/x86/mylib.so (myCfunction1 +409)
          #13  pc 00121f4d  /data/app/~~XX==/com.mycompany.myapp-W6-xx==/lib/x86/mylib.so (Java_com_mycompany_myapp_myjavaclass_myjavamethod +333)

我正在寻找一种简单的方法来用源代码的行号替换偏移函数（+333、+409、+99、...）。我通过在墓碑文件上使用 ndk-stack 来做这种事情。也许有一个工具能够破译“dumpsys meminfo --unreachable”的输出。

4

1 回答 1

0

I've found a simple solution. I attach the debugger to the process, set a breakpoint and move to the lldb console of android studio. To set a breapoint to a given offset after a function, I enter the command given here https://stackoverflow.com/a/23250892/9459302

For instance b -a (void*()(void, size_t)) myCfunction1 +400

where (void*(*)(void*, size_t)) is the prototype of myCfunction1

于 2021-03-30T14:17:02.997 回答