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[原创]SCTF low_re出题思路
发表于: 2022-1-4 19:43 14358
[原创]SCTF low_re出题思路

margina1
2022-1-4 19:43
14358
这个题其实算是逆向题, 考虑到这个题不是常规逆向思路, 并且有点谜语, 所以我把这个题放misc里面了.  
出题人比较菜, 如果给师傅们造成了不好的体验, 轻点骂, orz.
这个题目的预期解是通过pintool之类的插桩工具进行指令计数来进行爆破, 但是我也看到有一些师傅使用钩子来获得信息的一些思路, 甚至于做了一些vmp的逆向, 师傅们tql. 
这里是单字节加密(所以可以使用侧信道爆破)
使用python pyminifier的混淆功能去混淆python代码
虽然有一种乱码混淆, 但是可能会导致这样那样的问题, 我就没有使用了
 混淆出来之后可能点错误, 手动改改就ok了.
在文件的开头记得加上python3的声明 不然会转化失败
网上python的一个GCC编译exe的脚本
这里的unicode是因为winmain, 如果不用unicode会报错.
这样就生成了exe
网上找一个"学习"版的加壳软件, 关闭内存保护, 这样就可以进行插桩了.
师傅们基本上都是用的官方给的代码来构建, 但是pin官方给的指令计数是算了库的, 这样的话计算出来的指令正常波动就会非常大, 所以我使用了2560次的hash加密, 希望能够使得正确答案的指令大小更为明显, 但是我自己爆破的时候, 如果从头开始爆破, 在得到最后几个字符的时候可能会发生错误. 在和小组另外一个师傅@Cr0ssx2交流之后, 发现如果不计算库的时候指令波动会非常小.
下载地址https://www.intel.com/content/www/us/en/developer/articles/tool/pin-a-binary-instrumentation-tool-downloads.html
pin工具可以实现不算库的爆破, 但是官方好像没有给不计算库的指令的代码, 需要自己去写判断, 这里我做的限制条件是 exe的首地址 <= 需要计数指令的地址 <= exe的结束地址.
source/MyPinTool/MyPinTool.cpp: (用VS打开.vcxproj后缀文件就可以进行写代码了)
另外一款插桩工具dynamorio.这款工具的爆破其实比pin工具更快, 但是inscount.cpp的指令输出是消息框, 需要自己做一些改动.
这款工具的官方给的代码是有不计算库的选项的.
build官方文档:https://dynamorio.org/page_building.html
接下来直接打开build/api/samples/DynamoRIO_samples.sln就可以进行写代码编译了
修改后的inscount.cpp:
这里可以用C++ 的windows api来进行爆破, 使用重定向输入和输出创建子进程.
微软的官方文档里面相应的样例代码:
https://docs.microsoft.com/zh-cn/windows/win32/procthread/creating-a-child-process-with-redirected-input-and-output
我使用的是winpwn这个工具来进行爆破, 我稍微看了一下程序创建过程, 本质上还是python去调用windows api, 和C++调用windows API大致一样
爆破脚本:
这里值得注意的是, 最后输出的Count xxx 是输出到错误信息里面的, 并且是以'\n'结尾所以不能直接使用recvline().
winpwn部分源代码:
winpwn调用了win.py 
write相关调用:
 
import hashlib

import sys
 
def _rc4_crypt(key, data, dataLen):

    out = []

    s_box = list(range(256))

    j = 0

    for i in range(256):

        j = (j + s_box[i] + ord(key[i % len(key)])) % 256

        s_box[i], s_box[j] = s_box[j], s_box[i]
 
    for x in range(dataLen):

        i = (i + 1) % 256

        j = (j + s_box[i]) % 256

        t = s_box[i]

        s_box[i] = s_box[j]

        s_box[j] = t

        ti = (s_box[i] + (s_box[j] % 256)) % 256

        t = s_box[ti]

        while (len(out) < x + 1):

            out.append(0)

        out[x] = data[x] ^ t

    return out
 
def linux_srand(seed):

    if seed == 0:

        seed = 1

    word = seed

    seed = seed & 0xffffffff

    global linux_status

    global linux_r

    linux_status = 0

    linux_r = [0] * (344 + linux_status)

    linux_r[0] = seed

    for i in range(1, 31):

        if (word < 0):

            hi = (-word) // 127773

            hi = -hi

            lo = (-word) % 127773

            lo = -lo

        else:

            hi = word // 127773

            lo = word % 127773

        word = ((16807 * lo)) - ((2836 * hi))

        if word < 0:

            word = (2147483647 + word) & 0xffffffff

        linux_r[i] = word

    for i in range(31, 34):

        linux_r[i] = linux_r[i - 31]

    for i in range(34, 344):

        linux_r[i] = (((linux_r[i - 31] + linux_r[i - 3]) & 0xffffffff) % (1 << 32)) & 0xffffffff
 
def linux_rand():

    global linux_status

    global linux_r

    linux_r.append(0)

    linux_r[344 + linux_status] = (((linux_r[344 + linux_status - 31] + linux_r[344 + linux_status - 3]) & 0xffffffff) % (1 << 32)) & 0xffffffff

    linux_status += 1

    return linux_r[344 + linux_status - 1] >> 1

print("hello challanger")

flag = input("please input your flag:\n")

if (type(flag) != str):

    print("error")

    sys.exit()

if (len(flag) != 17):

    sys.exit()

flag = list(bytes(flag, encoding='utf-8'))

flag = _rc4_crypt('Sycl0ver', flag, len(flag))

for i in range(len(flag)):

    linux_srand(flag[i])

    flag[i] = str(linux_rand())

ciphertext=['ee197bbac1b0e09c425e1dfd30cea2506bd493a674c4de90d9afbe5abc700b06',

'1a6aafb16a23ffde40c426d5c87f5afcc77fffc96cf041dc8dd2c47e706a7ecb',

'62c62ce7768a4836b10495317a32da6e3943d522bc3b9797ff0a44931e966a31',

'e6222354b50e4d33d73314b515b325633e57a105758e20aca23eb2dadd625f3f',

'78f92a6ad9ffcec47f30e3ca3d18065bdba9c020ff5f477b801d11efdfaa9cd0',

'127291de1f4cbbb35c41556a3c6d5a64f08661bc7ed394ea6210354e6218ad93',

'62c62ce7768a4836b10495317a32da6e3943d522bc3b9797ff0a44931e966a31',

'52080868c07a9ef5646b5f0b198f04f013cf23cfbfb06123d8f2fdd63d359123',

'f69b52599973fc5915ad1d435236863252dc3fd460989bd9f56ffc199ef8ff36',

'e9552f8c3e518306524fa9c9728ad6dee88fa611aa3068c169217f173964f9b4',

'54cb43f463ea082699131b71d45fb0384f8c2f598e8f0072b960b4add731e048',

'97e45e15c74f71ea59ffffb40298f2e5dec119c2205e434e3a0d2510c331037f',

'51b7d78cfe25ede262fd85a65b24721f076ab9dd6562403878ca5cde1ebf3219',

'a1cd6c7990abb6b271695381d78898ec5c4880fbc0f6a0c9fda064422f21361e',

'85ddd3721d173367465373f75e190bd937a8dc3588d5d82ebff8104dec88ac3e',

'd6eeac4ea40f9513391ef0bf72aa2fd2588889cb9d5f4cc638ce4d2c5509527b',

'5023939dca9273fd767d5e4ea329846f9816af461e170b6db8d20b6e5ff3de8c']

for i in range(len(flag)):

    for j in range(2560):

        s = hashlib.sha256()

        s.update(bytes(flag[i], encoding='utf-8'))

        flag[i] = s.hexdigest()

    #print("'" + flag[i]+ "',")

    if (flag[i] != ciphertext[i]):

        sys.exit()

print("you are right")
sys.exit()

import hashlib

import sys
 
def _rc4_crypt(key, data, dataLen):

    out = []

    s_box = list(range(256))

    j = 0

    for i in range(256):

        j = (j + s_box[i] + ord(key[i % len(key)])) % 256

        s_box[i], s_box[j] = s_box[j], s_box[i]
 
    for x in range(dataLen):

        i = (i + 1) % 256

        j = (j + s_box[i]) % 256

        t = s_box[i]

        s_box[i] = s_box[j]

        s_box[j] = t

        ti = (s_box[i] + (s_box[j] % 256)) % 256

        t = s_box[ti]

        while (len(out) < x + 1):

            out.append(0)

        out[x] = data[x] ^ t

    return out
 
def linux_srand(seed):

    if seed == 0:

        seed = 1

    word = seed

    seed = seed & 0xffffffff

    global linux_status

    global linux_r

    linux_status = 0

    linux_r = [0] * (344 + linux_status)

    linux_r[0] = seed

    for i in range(1, 31):

        if (word < 0):

            hi = (-word) // 127773

            hi = -hi

            lo = (-word) % 127773

            lo = -lo

        else:

            hi = word // 127773

            lo = word % 127773

        word = ((16807 * lo)) - ((2836 * hi))

        if word < 0:

            word = (2147483647 + word) & 0xffffffff

        linux_r[i] = word

    for i in range(31, 34):

        linux_r[i] = linux_r[i - 31]

    for i in range(34, 344):

        linux_r[i] = (((linux_r[i - 31] + linux_r[i - 3]) & 0xffffffff) % (1 << 32)) & 0xffffffff
 
def linux_rand():

    global linux_status

    global linux_r

    linux_r.append(0)

    linux_r[344 + linux_status] = (((linux_r[344 + linux_status - 31] + linux_r[344 + linux_status - 3]) & 0xffffffff) % (1 << 32)) & 0xffffffff

    linux_status += 1

    return linux_r[344 + linux_status - 1] >> 1

print("hello challanger")

flag = input("please input your flag:\n")

if (type(flag) != str):

    print("error")

    sys.exit()

if (len(flag) != 17):

    sys.exit()

flag = list(bytes(flag, encoding='utf-8'))

flag = _rc4_crypt('Sycl0ver', flag, len(flag))

for i in range(len(flag)):

    linux_srand(flag[i])

    flag[i] = str(linux_rand())

ciphertext=['ee197bbac1b0e09c425e1dfd30cea2506bd493a674c4de90d9afbe5abc700b06',

'1a6aafb16a23ffde40c426d5c87f5afcc77fffc96cf041dc8dd2c47e706a7ecb',

'62c62ce7768a4836b10495317a32da6e3943d522bc3b9797ff0a44931e966a31',

'e6222354b50e4d33d73314b515b325633e57a105758e20aca23eb2dadd625f3f',

'78f92a6ad9ffcec47f30e3ca3d18065bdba9c020ff5f477b801d11efdfaa9cd0',

'127291de1f4cbbb35c41556a3c6d5a64f08661bc7ed394ea6210354e6218ad93',

'62c62ce7768a4836b10495317a32da6e3943d522bc3b9797ff0a44931e966a31',

'52080868c07a9ef5646b5f0b198f04f013cf23cfbfb06123d8f2fdd63d359123',

'f69b52599973fc5915ad1d435236863252dc3fd460989bd9f56ffc199ef8ff36',

'e9552f8c3e518306524fa9c9728ad6dee88fa611aa3068c169217f173964f9b4',

'54cb43f463ea082699131b71d45fb0384f8c2f598e8f0072b960b4add731e048',

'97e45e15c74f71ea59ffffb40298f2e5dec119c2205e434e3a0d2510c331037f',

'51b7d78cfe25ede262fd85a65b24721f076ab9dd6562403878ca5cde1ebf3219',

'a1cd6c7990abb6b271695381d78898ec5c4880fbc0f6a0c9fda064422f21361e',

'85ddd3721d173367465373f75e190bd937a8dc3588d5d82ebff8104dec88ac3e',

'd6eeac4ea40f9513391ef0bf72aa2fd2588889cb9d5f4cc638ce4d2c5509527b',

'5023939dca9273fd767d5e4ea329846f9816af461e170b6db8d20b6e5ff3de8c']

for i in range(len(flag)):

    for j in range(2560):

        s = hashlib.sha256()

        s.update(bytes(flag[i], encoding='utf-8'))

        flag[i] = s.hexdigest()

    #print("'" + flag[i]+ "',")

    if (flag[i] != ciphertext[i]):

        sys.exit()

print("you are right")
sys.exit()
 
pyminifier --obfuscate

pyminifier --obfuscate
# cython: language_level=3
# cython: language_level=3

import subprocess

import sys

import tempfile

from Cython.Compiler import Main, CmdLine, Options
 
in_file_name = sys.argv[1]

source = open(in_file_name).read()

out_file_name = in_file_name.replace('.py', '.exe')
 
temp_py_file = tempfile.NamedTemporaryFile(suffix='.py', delete=False)
temp_py_file.write(source.encode())
temp_py_file.flush()
 
Main.Options.embed = 'main'

res = Main.compile_single(temp_py_file.name, Main.CompilationOptions(), '')
 
gcc_cmd = 'gcc -static -municode -DMS_WIN64 -fPIC -O2 %s -Id:\\Python\\Python38\\include -Ld:\\Python\\Python38\\libs -lpython38 -o %s' % (res.c_file, out_file_name)
 
print(gcc_cmd)

assert 0 == subprocess.check_call(gcc_cmd.split(' '))

import subprocess

import sys

import tempfile

from Cython.Compiler import Main, CmdLine, Options
 
in_file_name = sys.argv[1]

source = open(in_file_name).read()

out_file_name = in_file_name.replace('.py', '.exe')
 
temp_py_file = tempfile.NamedTemporaryFile(suffix='.py', delete=False)
temp_py_file.write(source.encode())
temp_py_file.flush()
 
Main.Options.embed = 'main'

res = Main.compile_single(temp_py_file.name, Main.CompilationOptions(), '')
 
gcc_cmd = 'gcc -static -municode -DMS_WIN64 -fPIC -O2 %s -Id:\\Python\\Python38\\include -Ld:\\Python\\Python38\\libs -lpython38 -o %s' % (res.c_file, out_file_name)
 
print(gcc_cmd)

assert 0 == subprocess.check_call(gcc_cmd.split(' '))
 
/*

 * Copyright 2002-2020 Intel Corporation.

 *

 * This software is provided to you as Sample Source Code as defined in the accompanying

 * End User License Agreement for the Intel(R) Software Development Products ("Agreement")

 * section 1.L.

 *

 * This software and the related documents are provided as is, with no express or implied

 * warranties, other than those that are expressly stated in the License.

 */
 
 /*! @file

  *  This file contains an ISA-portable PIN tool for counting dynamic instructions

  */
 
#include "pin.H"
#include <iostream>
using std::cerr;
using std::endl;
 
/* ===================================================================== */

/* Global Variables */

/* ===================================================================== */
 
UINT64 ins_count = 0;

bool runing = false;
UINT64 exe_start;
UINT64 exe_size;

/* ===================================================================== */

/* Commandline Switches */

/* ===================================================================== */
 
/* ===================================================================== */

/* Print Help Message                                                    */

/* ===================================================================== */
 
INT32 Usage()
{

    cerr << "This tool prints out the number of dynamic instructions executed to stderr.\n"

        "\n";
 
    cerr << KNOB_BASE::StringKnobSummary();
 
    cerr << endl;
 
    return -1;
}
 
/* ===================================================================== */
 
VOID docount() { ins_count++; } 
 
/* ===================================================================== */
 
VOID Instruction(INS ins, VOID* v) 
{ 

    ADDRINT addr = INS_Address(ins);

    if (exe_start <= addr && addr <= exe_start + exe_size) //判断指令是否在库中, 若不在, 则进行插桩

        INS_InsertCall(ins, IPOINT_BEFORE, (AFUNPTR)docount, IARG_END); 
}

VOID Image(IMG img, VOID* v)
{

    if (IMG_IsMainExecutable(img))

    {

        exe_start = IMG_StartAddress(img);

        exe_size = IMG_SizeMapped(img);

    }
}
 
/* ===================================================================== */
 
VOID Fini(INT32 code, VOID* v) { 

    cerr << "Count " << ins_count << " " << exe_start << " " << exe_size + exe_start << endl;
}
 
/* ===================================================================== */

/* Main                                                                  */

/* ===================================================================== */
 
int main(int argc, char* argv[])
{

    if (PIN_Init(argc, argv))

    {

        return Usage();

    }

    IMG_AddInstrumentFunction(Image, 0);

    INS_AddInstrumentFunction(Instruction, 0);

    PIN_AddFiniFunction(Fini, 0);
 
    // Never returns

    PIN_StartProgram();
 
    return 0;
}
 
/* ===================================================================== */

/* eof */

/* ===================================================================== */

/*

 * Copyright 2002-2020 Intel Corporation.

 *

 * This software is provided to you as Sample Source Code as defined in the accompanying

 * End User License Agreement for the Intel(R) Software Development Products ("Agreement")

 * section 1.L.

 *

 * This software and the related documents are provided as is, with no express or implied

 * warranties, other than those that are expressly stated in the License.

 */
 
 /*! @file

  *  This file contains an ISA-portable PIN tool for counting dynamic instructions

  */
 
#include "pin.H"
#include <iostream>
using std::cerr;
using std::endl;
 
/* ===================================================================== */

/* Global Variables */

/* ===================================================================== */
 
UINT64 ins_count = 0;

bool runing = false;
UINT64 exe_start;
UINT64 exe_size;

/* ===================================================================== */

/* Commandline Switches */

/* ===================================================================== */
 
/* ===================================================================== */

/* Print Help Message                                                    */

/* ===================================================================== */
 
INT32 Usage()
{

    cerr << "This tool prints out the number of dynamic instructions executed to stderr.\n"

        "\n";
 
    cerr << KNOB_BASE::StringKnobSummary();
 
    cerr << endl;
 
    return -1;
}
 
/* ===================================================================== */
 
VOID docount() { ins_count++; } 
 
/* ===================================================================== */
 
VOID Instruction(INS ins, VOID* v) 
{ 

    ADDRINT addr = INS_Address(ins);

    if (exe_start <= addr && addr <= exe_start + exe_size) //判断指令是否在库中, 若不在, 则进行插桩

        INS_InsertCall(ins, IPOINT_BEFORE, (AFUNPTR)docount, IARG_END); 
}

VOID Image(IMG img, VOID* v)
{

    if (IMG_IsMainExecutable(img))

    {

        exe_start = IMG_StartAddress(img);

        exe_size = IMG_SizeMapped(img);

    }
}
 
/* ===================================================================== */
 
VOID Fini(INT32 code, VOID* v) { 

    cerr << "Count " << ins_count << " " << exe_start << " " << exe_size + exe_start << endl;
}
 
/* ===================================================================== */

/* Main                                                                  */

/* ===================================================================== */
 
int main(int argc, char* argv[])
{

    if (PIN_Init(argc, argv))

    {

        return Usage();

    }

    IMG_AddInstrumentFunction(Image, 0);

    INS_AddInstrumentFunction(Instruction, 0);

    PIN_AddFiniFunction(Fini, 0);
 
    // Never returns

    PIN_StartProgram();
 
    return 0;
}
 
/* ===================================================================== */

/* eof */

/* ===================================================================== */
 
git clone https://github.com/DynamoRIO/dynamorio.git
cd dynamorio && mkdir build && cd build

cmake -G"Visual Studio 15" .. #从这里指定你的VS版本, 2019为16, 2022为17 后面跟上dynamorio的源路径

cmake --build . --config RelWithDebInfo

git clone https://github.com/DynamoRIO/dynamorio.git
cd dynamorio && mkdir build && cd build

cmake -G"Visual Studio 15" .. #从这里指定你的VS版本, 2019为16, 2022为17 后面跟上dynamorio的源路径

cmake --build . --config RelWithDebInfo
 
/* ******************************************************************************

 * Copyright (c) 2014-2018 Google, Inc.  All rights reserved.

 * Copyright (c) 2011 Massachusetts Institute of Technology  All rights reserved.

 * Copyright (c) 2008 VMware, Inc.  All rights reserved.

 * ******************************************************************************/
 
/*

 * Redistribution and use in source and binary forms, with or without

 * modification, are permitted provided that the following conditions are met:

 *

 * * Redistributions of source code must retain the above copyright notice,

 *   this list of conditions and the following disclaimer.

 *

 * * Redistributions in binary form must reproduce the above copyright notice,

 *   this list of conditions and the following disclaimer in the documentation

 *   and/or other materials provided with the distribution.

 *

 * * Neither the name of VMware, Inc. nor the names of its contributors may be

 *   used to endorse or promote products derived from this software without

 *   specific prior written permission.

 *

 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"

 * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE

 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE

 * ARE DISCLAIMED. IN NO EVENT SHALL VMWARE, INC. OR CONTRIBUTORS BE LIABLE

 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL

 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR

 * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER

 * CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT

 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY

 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH

 * DAMAGE.

 */
 
/* Code Manipulation API Sample:

 * inscount.cpp

 *

 * Reports the dynamic count of the total number of instructions executed.

 * Illustrates how to perform performant clean calls.

 * Demonstrates effect of clean call optimization and auto-inlining with

 * different -opt_cleancall values.

 *

 * The runtime options for this client include:

 *   -only_from_app  Do not count instructions in shared libraries.

 * The options are handled using the droption extension.

 */
 
#include "dr_api.h"
#include "drmgr.h"
#include "droption.h"
#include <string.h>
#include<iostream>
 
#ifdef WINDOWS
#    define DISPLAY_STRING(msg) dr_messagebox(msg)
#else
#    define DISPLAY_STRING(msg) dr_printf("%s\n", msg);
#endif
 
#define NULL_TERMINATE(buf) (buf)[(sizeof((buf)) / sizeof((buf)[0])) - 1] = '\0'
 
static droption_t<bool> only_from_app(

    DROPTION_SCOPE_CLIENT, "only_from_app", false,

    "Only count app, not lib, instructions",

    "Count only instructions in the application itself, ignoring instructions in "

    "shared libraries."); //把选项加上only_from_app就可以不进行库的计数
 
/* Application module */
static app_pc exe_start;

/* we only have a global count */
static uint64 global_count;

/* A simple clean call that will be automatically inlined because it has only

 * one argument and contains no calls to other functions.

 */
static void
inscount(uint num_instrs)
{

    global_count += num_instrs;
}
static void
event_exit(void);
static dr_emit_flags_t

event_bb_analysis(void *drcontext, void *tag, instrlist_t *bb, bool for_trace,

                  bool translating, void **user_data);
static dr_emit_flags_t

event_app_instruction(void *drcontext, void *tag, instrlist_t *bb, instr_t *inst,

                      bool for_trace, bool translating, void *user_data);
 
DR_EXPORT void

dr_client_main(client_id_t id, int argc, const char *argv[])
{

    dr_set_client_name("DynamoRIO Sample Client 'inscount'",

                       "http://dynamorio.org/issues");
 
    /* Options */

    if (!droption_parser_t::parse_argv(DROPTION_SCOPE_CLIENT, argc, argv, NULL, NULL))

        DR_ASSERT(false);

    drmgr_init();
 
    /* Get main module address */

    if (only_from_app.get_value()) {

        module_data_t *exe = dr_get_main_module();

        if (exe != NULL)

            exe_start = exe->start;

        dr_free_module_data(exe);

    }
 
    /* register events */

    dr_register_exit_event(event_exit);

    drmgr_register_bb_instrumentation_event(event_bb_analysis, event_app_instruction,

                                            NULL);
 
    /* make it easy to tell, by looking at log file, which client executed */

    dr_log(NULL, DR_LOG_ALL, 1, "Client 'inscount' initializing\n");
#ifdef SHOW_RESULTS

    /* also give notification to stderr */

    if (dr_is_notify_on()) {
#    ifdef WINDOWS

        /* ask for best-effort printing to cmd window.  must be called at init. */

        dr_enable_console_printing();
#    endif

        dr_fprintf(STDERR, "Client inscount is running\n");

    }
#endif
}
 
static void
event_exit(void)
{
#ifdef SHOW_RESULTS

    char msg[512];

    int len;

    len = dr_snprintf(msg, sizeof(msg) / sizeof(msg[0]),

                      "Instrumentation results: %llu instructions executed\n",

                      global_count);

    DR_ASSERT(len > 0);

    NULL_TERMINATE(msg);

    //DISPLAY_STRING(msg);   //这里是messagebox 把这个数据时间控制台输出就行了

    std::cout << msg << std::endl;
#endif /* SHOW_RESULTS */

    drmgr_exit();
}
 
static dr_emit_flags_t

event_bb_analysis(void *drcontext, void *tag, instrlist_t *bb, bool for_trace,

                  bool translating, void **user_data)
{

    instr_t *instr;

    uint num_instrs;
 
#ifdef VERBOSE

    dr_printf("in dynamorio_basic_block(tag=" PFX ")\n", tag);
#    ifdef VERBOSE_VERBOSE

    instrlist_disassemble(drcontext, tag, bb, STDOUT);
#    endif
#endif

    /* Only count in app BBs */

    if (only_from_app.get_value()) {

        module_data_t *mod = dr_lookup_module(dr_fragment_app_pc(tag));

        if (mod != NULL) {

            bool from_exe = (mod->start == exe_start);

            dr_free_module_data(mod);

            if (!from_exe) {

                *user_data = NULL;

                return DR_EMIT_DEFAULT;

            }

        }

    }
 
    /* Count instructions. If an emulation client is running with this client,

     * we want to count all the original native instructions and the emulated

     * instruction but NOT the introduced native instructions used for emulation.

     */

    bool is_emulation = false;

    for (instr = instrlist_first(bb), num_instrs = 0; instr != NULL;

         instr = instr_get_next(instr)) {

        if (drmgr_is_emulation_start(instr)) {

            /* Each emulated instruction is replaced by a series of native

             * instructions delimited by labels indicating when the emulation

             * sequence begins and ends. It is the responsibility of the

             * emulation client to place the start/stop labels correctly.

             */

            num_instrs++;

            is_emulation = true;

            /* Data about the emulated instruction can be extracted from the

             * start label using the accessor function:

             * drmgr_get_emulated_instr_data()

             */

            continue;

        }

        if (drmgr_is_emulation_end(instr)) {

            is_emulation = false;

            continue;

        }

        if (is_emulation)

            continue;

        if (!instr_is_app(instr))

            continue;

        num_instrs++;

    }

    *user_data = (void *)(ptr_uint_t)num_instrs;
 
#if defined(VERBOSE) && defined(VERBOSE_VERBOSE)

    dr_printf("Finished counting for dynamorio_basic_block(tag=" PFX ")\n", tag);

    instrlist_disassemble(drcontext, tag, bb, STDOUT);
#endif

    return DR_EMIT_DEFAULT;
}
 
static dr_emit_flags_t

event_app_instruction(void *drcontext, void *tag, instrlist_t *bb, instr_t *instr,

                      bool for_trace, bool translating, void *user_data)
{

    uint num_instrs;

    /* By default drmgr enables auto-predication, which predicates all instructions with

     * the predicate of the current instruction on ARM.

     * We disable it here because we want to unconditionally execute the following

     * instrumentation.

     */

    drmgr_disable_auto_predication(drcontext, bb);

    if (!drmgr_is_first_instr(drcontext, instr))

        return DR_EMIT_DEFAULT;

    /* Only insert calls for in-app BBs */

    if (user_data == NULL)

        return DR_EMIT_DEFAULT;

    /* Insert clean call */

    num_instrs = (uint)(ptr_uint_t)user_data;

    dr_insert_clean_call(drcontext, bb, instrlist_first_app(bb), (void *)inscount,

                         false /* save fpstate */, 1, OPND_CREATE_INT32(num_instrs));

    return DR_EMIT_DEFAULT;
}

/* ******************************************************************************

 * Copyright (c) 2014-2018 Google, Inc.  All rights reserved.

 * Copyright (c) 2011 Massachusetts Institute of Technology  All rights reserved.

 * Copyright (c) 2008 VMware, Inc.  All rights reserved.

 * ******************************************************************************/
 
/*

 * Redistribution and use in source and binary forms, with or without

 * modification, are permitted provided that the following conditions are met:

 *

 * * Redistributions of source code must retain the above copyright notice,

 *   this list of conditions and the following disclaimer.

 *

 * * Redistributions in binary form must reproduce the above copyright notice,

 *   this list of conditions and the following disclaimer in the documentation

 *   and/or other materials provided with the distribution.

 *

 * * Neither the name of VMware, Inc. nor the names of its contributors may be

 *   used to endorse or promote products derived from this software without

 *   specific prior written permission.

 *

 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"

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