检测 iOS 应用程序是否在调试器中运行 [英] Detecting if iOS app is run in debugger

问题描述

我将我的应用程序设置为将调试输出发送到控制台或日志文件.现在，我想在代码中决定是否

I set up my application to either send debugging output to console or a log file. Now, I'd like to decide with in the code whether

• 它在调试器(或模拟器)中运行，因此有一个控制台窗口，我想直接读取输出，或者如果
• 没有控制台窗口，因此应该将输出重定向到一个文件.

有没有办法确定应用程序是否在调试器中运行?

Is there a way to determine if the app runs in the debugger?

推荐答案

技术问答 1361 (进入 Mac 库 和 iOS 库中的条目；它们是相同的).

There's a function from Apple to detect whether a program is being debugged in the Technical Q&A 1361 (entry in Mac library and entry in iOS library; they are identical).

来自技术问答的代码:

#include <assert.h>
#include <stdbool.h>
#include <sys/types.h>
#include <unistd.h>
#include <sys/sysctl.h>

static bool AmIBeingDebugged(void)
    // Returns true if the current process is being debugged (either 
    // running under the debugger or has a debugger attached post facto).
{
    int                 junk;
    int                 mib[4];
    struct kinfo_proc   info;
    size_t              size;

    // Initialize the flags so that, if sysctl fails for some bizarre 
    // reason, we get a predictable result.

    info.kp_proc.p_flag = 0;

    // Initialize mib, which tells sysctl the info we want, in this case
    // we're looking for information about a specific process ID.

    mib[0] = CTL_KERN;
    mib[1] = KERN_PROC;
    mib[2] = KERN_PROC_PID;
    mib[3] = getpid();

    // Call sysctl.

    size = sizeof(info);
    junk = sysctl(mib, sizeof(mib) / sizeof(*mib), &info, &size, NULL, 0);
    assert(junk == 0);

    // We're being debugged if the P_TRACED flag is set.

    return ( (info.kp_proc.p_flag & P_TRACED) != 0 );
}

还要注意问答末尾的这个注释:

Also pay attention to this note at the end of the Q&A:

重要提示:因为kinfo_proc结构的定义(在中)是由条件化的__APPLE_API_UNSTABLE，您应该将上述代码的使用限制在您程序的调试版本中.

Important: Because the definition of the kinfo_proc structure (in <sys/sysctl.h>) is conditionalized by __APPLE_API_UNSTABLE, you should restrict use of the above code to the debug build of your program.

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