Java Galaxy S5和Android 5.1.1上do/while语句中的奇怪行为

在Galaxy S5和Android 5.1.1上，我面临do/while语句的奇怪行为。如果你有任何信息，请告诉我

int i = 0;
int j = 0;

do {
    Log.d(TAG, "[test do-while 1] i = " + i + ", j = " + j);
    i = 0;
    Log.d(TAG, "[test do-while 2] i = " + i + ", j = " + j);
    i++;
    Log.d(TAG, "[test do-while 3] i = " + i + ", j = " + j);
    i++;
    Log.d(TAG, "[test do-while 4] i = " + i + ", j = " + j);
    j++;
    Log.d(TAG, "[test do-while 5] i = " + i + ", j = " + j);
} while (j < 5);

如果我将在其他设备或其他o/s版本上运行相同的程序，输出如下

D/MainActivity( 9856): [test do-while 1] i = 2, j = 0
D/MainActivity( 9856): [test do-while 2] i = 2, j = 0
D/MainActivity( 9856): [test do-while 3] i = 2, j = 0
D/MainActivity( 9856): [test do-while 4] i = 2, j = 0
D/MainActivity( 9856): [test do-while 5] i = 2, j = 1
D/MainActivity( 9856): [test do-while 1] i = 2, j = 1
D/MainActivity( 9856): [test do-while 2] i = 2, j = 1
D/MainActivity( 9856): [test do-while 3] i = 2, j = 1
D/MainActivity( 9856): [test do-while 4] i = 2, j = 1
D/MainActivity( 9856): [test do-while 5] i = 2, j = 2
D/MainActivity( 9856): [test do-while 1] i = 2, j = 2
D/MainActivity( 9856): [test do-while 2] i = 2, j = 2
D/MainActivity( 9856): [test do-while 3] i = 2, j = 2
D/MainActivity( 9856): [test do-while 4] i = 2, j = 2
D/MainActivity( 9856): [test do-while 5] i = 2, j = 3
D/MainActivity( 9856): [test do-while 1] i = 2, j = 3
D/MainActivity( 9856): [test do-while 2] i = 2, j = 3
D/MainActivity( 9856): [test do-while 3] i = 2, j = 3
D/MainActivity( 9856): [test do-while 4] i = 2, j = 3
D/MainActivity( 9856): [test do-while 5] i = 2, j = 4
D/MainActivity( 9856): [test do-while 1] i = 2, j = 4
D/MainActivity( 9856): [test do-while 2] i = 2, j = 4
D/MainActivity( 9856): [test do-while 3] i = 2, j = 4
D/MainActivity( 9856): [test do-while 4] i = 2, j = 4
D/MainActivity( 9856): [test do-while 5] i = 2, j = 5

D/MainActivity( 9515): [test do-while 1] i = 0, j = 0
D/MainActivity( 9515): [test do-while 2] i = 0, j = 0
D/MainActivity( 9515): [test do-while 3] i = 1, j = 0
D/MainActivity( 9515): [test do-while 4] i = 2, j = 0
D/MainActivity( 9515): [test do-while 5] i = 2, j = 1
D/MainActivity( 9515): [test do-while 1] i = 2, j = 1
D/MainActivity( 9515): [test do-while 2] i = 0, j = 1
D/MainActivity( 9515): [test do-while 3] i = 1, j = 1
D/MainActivity( 9515): [test do-while 4] i = 2, j = 1
D/MainActivity( 9515): [test do-while 5] i = 2, j = 2
D/MainActivity( 9515): [test do-while 1] i = 2, j = 2
D/MainActivity( 9515): [test do-while 2] i = 0, j = 2
D/MainActivity( 9515): [test do-while 3] i = 1, j = 2
D/MainActivity( 9515): [test do-while 4] i = 2, j = 2
D/MainActivity( 9515): [test do-while 5] i = 2, j = 3
D/MainActivity( 9515): [test do-while 1] i = 2, j = 3
D/MainActivity( 9515): [test do-while 2] i = 0, j = 3
D/MainActivity( 9515): [test do-while 3] i = 1, j = 3
D/MainActivity( 9515): [test do-while 4] i = 2, j = 3
D/MainActivity( 9515): [test do-while 5] i = 2, j = 4
D/MainActivity( 9515): [test do-while 1] i = 2, j = 4
D/MainActivity( 9515): [test do-while 2] i = 0, j = 4
D/MainActivity( 9515): [test do-while 3] i = 1, j = 4
D/MainActivity( 9515): [test do-while 4] i = 2, j = 4
D/MainActivity( 9515): [test do-while 5] i = 2, j = 5

• 如果我们将代码转换为while或for语句，则不会出现问题
• 如果我们使用同步文件i/o创建自己的日志库，则会出现问题
• 不会出现在Galaxy S4和S6或Android 5.0.2上

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可能不是你想要的答案，但只是一个测试（因为我很好奇）： -声明i为final，并为其赋值0。 -删除i的increment语句
如果你得到了相同的答案，那么： 1.我在别的地方申报了2。 2.你发现了一个bug
另外，如果将i声明为整数而不是int，是否会出现问题？

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这里有一些东西需要学习
您是否能够在另一台运行Snapdragon 801处理器（如S5）的设备上进行测试？（见附件）。这可能是一个优化问题。您是否可以尝试使用相同的代码，将

i

和

j

声明为

volatile int

s？…这很可能是优化中的一个错误。它似乎将“log”移到“j++”之前。