GDB调试手机工程

挂载自己编译好的工程

• 以我自己在10.1.6.32编译的工程为例.

  sudo mount -t cifs -o username="android",password="mobile#5" //10.1.6.32/android /mnt/10.1.6.32

• 错误提示:

  mount: block device //10.1.6.36/android is write-protected, mounting read-only
  mount: cannot mount block device //10.1.6.36/android read-only

• 实际是密码错误:

  sudo mount -t cifs -o username="android",password="hipad@123" //10.1.6.36/android /mnt/10.1.6.36

sudo mount -t cifs -o username="android",password="hipad@123" //10.1.6.14/android /mnt/10.1.6.14

CIFS文件系统的读写权限

• 查看用户ID

  cat /etc/passwd | grep 你的用户名

• 参考网址:
  https://blog.csdn.net/qq_21808961/article/details/78532487

• 普通用户如何拥有挂载的CIFS文件系统的读写权限:
  https://blog.csdn.net/u012487272/article/details/80530473

• 可读写挂载方法:

  sudo mount -t cifs -o username="android",password="hipad@123",uid=1000,gid=1000 //10.1.6.14/android /mnt/10.1.6.14

• TIPS:

  参考文档:
  http://www.vixual.net/blog/archives/228

编译gdbserver(或者直接用ndk里面的)

mmm prebuilts/misc/android-arm/gdbserver/ -j8

adb push out/target/product/QS5509QL/system/bin/gdbserver system/bin/

Gdbserver attatch 你要测试的程序

adb shell gdbserver :5039 --attach 2275 (3474 是你要debug的PROCESS PID)

设置手机端口映射到PC

adb forward tcp:5039 tcp:5039

GDB 调试连接

• 启动GDB

  android@NSGWD180021:/mnt/10.1.6.32/black/QS5509QL-black/v1A5Z-black-test_memory_leak$
  
  prebuilts/gdb/linux-x86/bin/gdb
  
  (gdb) set solib-absolute-prefix /mnt/10.1.6.32/black/QS5509QL-black/v1A5Z-black-test_memory_leak/out/target/product/QS5509QL/symbols/
  (gdb) set solib-search-path /mnt/10.1.6.32/black/QS5509QL-black/v1A5Z-black-test_memory_leak/out/target/product/QS5509QL/symbols/system/lib/
  (gdb) target remote :5039
  (gdb) b jpeg_start_decompress
  (gdb) b je_malloc if size > 100000 && size != 1336
  (gdb) c

• 结果

Thread 40 "Measurement Wor" hit Breakpoint 2, je_malloc (size=120000) at external/jemalloc/src/jemalloc.c:1649
1649		if (likely(!malloc_slow)) {
(gdb) bt
#0  je_malloc (size=120000) at external/jemalloc/src/jemalloc.c:1649
#1  0xa99da590 in sqlite3MemMalloc (nByte=120000) at external/sqlite/dist/sqlite3.c:20840
#2  0xa9986d1c in mallocWithAlarm (n=120000, pp=<optimized out>) at external/sqlite/dist/sqlite3.c:24524
#3  sqlite3Malloc (n=5153960875200) at external/sqlite/dist/sqlite3.c:24554
#4  0xa999007c in setupLookaside (db=0x8b9e6e00, pBuf=0x0, sz=1200, cnt=100) at external/sqlite/dist/sqlite3.c:141298
#5  0xa99915f2 in openDatabase (zFilename=<optimized out>, ppDb=<optimized out>, flags=<optimized out>, zVfs=<optimized out>) at external/sqlite/dist/sqlite3.c:143682
#6  0xa9f94f3c in android::nativeOpen (env=0x9d6daf80, clazz=<optimized out>, pathStr=<optimized out>, openFlags=268435456, labelStr=<optimized out>, enableTrace=6 '\006', enableProfile=0 '\000', 
    lookasideSz=0, lookasideCnt=-2024916864) at frameworks/base/core/jni/android_database_SQLiteConnection.cpp:135
#7  0x70f9719c in android.database.sqlite.SQLiteConnection.nativeOpen ()
   from /mnt/10.1.6.32/black/QS5509QL-black/v1A5Z-black-test_memory_leak/out/target/product/QS5509QL/symbols/system/framework/arm/boot-framework.oat
#8  0x70f975ba in android.database.sqlite.SQLiteConnection.open ()
   from /mnt/10.1.6.32/black/QS5509QL-black/v1A5Z-black-test_memory_leak/out/target/product/QS5509QL/symbols/system/framework/arm/boot-framework.oat
#9  0x70f974ce in android.database.sqlite.SQLiteConnection.open ()
   from /mnt/10.1.6.32/black/QS5509QL-black/v1A5Z-black-test_memory_leak/out/target/product/QS5509QL/symbols/system/framework/arm/boot-framework.oat
#10 0x70f9bf86 in android.database.sqlite.SQLiteConnectionPool.open ()
   from /mnt/10.1.6.32/black/QS5509QL-black/v1A5Z-black-test_memory_leak/out/target/product/QS5509QL/symbols/system/framework/arm/boot-framework.oat
#11 0x70f9bf12 in android.database.sqlite.SQLiteConnectionPool.open ()
   from /mnt/10.1.6.32/black/QS5509QL-black/v1A5Z-black-test_memory_leak/out/target/product/QS5509QL/symbols/system/framework/arm/boot-framework.oat
#12 0x70fa0c8a in android.database.sqlite.SQLiteDatabase.openInner ()
   from /mnt/10.1.6.32/black/QS5509QL-black/v1A5Z-black-test_memory_leak/out/target/product/QS5509QL/symbols/system/framework/arm/boot-framework.oat
#13 0x70fa0858 in android.database.sqlite.SQLiteDatabase.open ()
   from /mnt/10.1.6.32/black/QS5509QL-black/v1A5Z-black-test_memory_leak/out/target/product/QS5509QL/symbols/system/framework/arm/boot-framework.oat
#14 0x70fa0ba6 in android.database.sqlite.SQLiteDatabase.openDatabase ()

参考文档:

https://wladimir-tm4pda.github.io/porting/debugging_gdb.html