Question

我正在使用Visual Studio 17 v15.0和Win 10 Anniversary Update SDK。

我使用cl /EHsc /O2 /DUNICODE /bigobj /await /std:c++latest或/MT构建了以下代码（基本上为sample in github repo）。它编译没有错误。

如果我在当前目录中出现``message.png“不时运行，则会抛出异常，捕获并报告printf，然后退出而不会崩溃。

如果我在当前目录中出现``message.png“ 时运行，”Hello World！“将被打印，然后无缘无故崩溃。

奇怪的是如果我在GDB调试器中运行它，GDB总是说程序正常退出（事实上没有发生崩溃）。

GDB输出：

MD

代码：

[New Thread 1364.0x2324]
[New Thread 1364.0x624]
[New Thread 1364.0x12cc]
[New Thread 1364.0x58c]
[New Thread 1364.0x1134]
[New Thread 1364.0x10d8]
[New Thread 1364.0x18a8]
[New Thread 1364.0x1794]
[New Thread 1364.0x20e8]
[New Thread 1364.0x2204]
[New Thread 1364.0x1030]
[New Thread 1364.0x1474]
Hello world!
[Thread 1364.0x10d8 exited with code 0]
[Thread 1364.0x624 exited with code 0]
[Thread 1364.0x20e8 exited with code 0]
[Thread 1364.0x1794 exited with code 0]
[Thread 1364.0x18a8 exited with code 0]
[Thread 1364.0x58c exited with code 0]
[Thread 1364.0x1134 exited with code 0]
[Thread 1364.0x12cc exited with code 0]
[Thread 1364.0x8d0 exited with code 0]
[Thread 1364.0x2324 exited with code 0]
[Thread 1364.0x1b38 exited with code 0]
[Thread 1364.0x2204 exited with code 0]
[Thread 1364.0x1030 exited with code 0]
[Thread 1364.0x1474 exited with code 0]
[Inferior 1 (process 1364) exited normally]

Answer 1

结果hstring返回的AsyncSample().get()未终止，因此printf崩溃。

try
{
    auto ans = AsyncSample().get();
    printf("[%u]: ", ans.size());
    auto s = ans.c_str();
    for (uint32_t i = 0; i < ans.size(); i++) {
        printf("%lc", s[i]);
    }
    putchar('\n');
}

cppwinrt例子中的神秘崩溃

1 个答案: