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
我设置了我的应用程序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在调试器(或模拟器)中运行,并且因此具有控制台的
- 窗口,我想直接读取输出,或者如果
- 没有控制台窗口,因此输出应该被重定向到一个文件。
#include< ; assert.h>
#include< stdbool.h>
#include< sys / types.h>
#include< unistd.h>
#include< sys / sysctl.h>
static bool AmIBeingDebugged(void)
//如果正在调试当前进程(
//在调试器下运行或调试器附加事后),则返回true。
{
int junk;
int mib [4];
struct kinfo_proc info;
size_t size;
//初始化标志,以便如果sysctl失败了一些奇怪的
//原因,我们得到一个可预测的结果。
info.kp_proc.p_flag = 0;
//初始化mib,它告诉sysctl我们想要的信息,在这种情况下
//我们正在寻找有关特定进程ID的信息。
mib [0] = CTL_KERN;
mib [1] = KERN_PROC;
mib [2] = KERN_PROC_PID;
mib [3] = getpid();
//调用sysctl。
size = sizeof(info);
junk = sysctl(mib,sizeof(mib)/ sizeof(* mib),& info,& size,NULL,0);
assert(junk == 0);
//如果设置了P_TRACED标志,我们正在调试。
return((info.kp_proc.p_flag& P_TRACED)!= 0);
}
还要注意Q& A: / p>
重要提示:因为
kinfo_proc
结构的定义(在< sys / sysctl.h>
)以__ APPLE_API_UNSTABLE
为条件,您应该限制使用上述代码到您的程序的调试版本。
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
- it is run in the debugger (or simulator) and have thus a console window where I would like to read the output directly or if
- there is no console window and thus, the output should be redirected to a file.
Is there a way to determine if the app runs in the debugger?
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).
Code from the Technical Q&A:
#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 );
}
Also pay attention to this note at the end of the Q&A:
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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