anti_debug.cpp

#include <string>
#include <sys/ptrace.h>
#include <unistd.h>
#include <stdlib.h>
#include <chrono>
#include <thread>
#include "log.h"

void be_attached_check()
{
	try
	{
		const int bufsize = 1024;
		char filename[bufsize];
		char line[bufsize];
		int pid = getpid();
		sprintf(filename, "/proc/%d/status", pid);
		FILE* fd = fopen(filename, "r");
		if (fd != nullptr)
		{
			while (fgets(line, bufsize, fd))
			{
				if (strncmp(line, "TracerPid", 9) == 0)
				{
					int statue = atoi(&line[10]);
					LOGD("%s", line);
					if (statue != 0)
					{
						LOGD("be attached !! kill %d", pid);
						fclose(fd);
						int ret = kill(pid, SIGKILL);
					}
					break;
				}
			}
			fclose(fd);
		} else
		{
			LOGD("open %s fail...", filename);
		}
	} catch (...)
	{

	}

}

//检查线程, 每秒检查一下
void thread_task(int n)
{
	while (true)
	{
		LOGD("start be_attached_check...");
		be_attached_check();
		std::this_thread::sleep_for(std::chrono::seconds(n));
	}
}

void anti_debug()
{
//	ptrace(PTRACE_TRACEME, 0, 0, 0);
	auto checkThread = std::thread(thread_task, 1);
	checkThread.detach();
}

jint JNI_OnLoad(JavaVM* vm, void* reserved)
{
	anti_debug();
	JNIEnv* env;
	if (vm->GetEnv(reinterpret_cast<void**>(&env), JNI_VERSION_1_6) != JNI_OK)
	{
		return -1;
	}

	return JNI_VERSION_1_6;
}