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Ultimate Guide to Python Debugging

Instead of modifying body of said function you could employ logging decorator which would log every function...logging.warning(message) return message # Or raise some error instead The implementation above...Let's first see our little crashing script: # crashing_app.py SOME_VAR = 42 class SomeError(Exception...$ python3 -i crashing_app.py Traceback (most recent call last): File "crashing_app.py", line 9, in...After program terminates we enter interactive debugging session.

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内存泄漏分析的利器——gperftools的Heap Checker

/configure make sudo make install 现在可以编译安装gperftools了 git clone https://github.com/gperftools.../configure make sudo make install 最后，我们安装下结果可视化分析工具kcachegrind sudo apt install kcachegrind...include int main() { const int array_count = 4; int* p = new int[array_count]; return...TCMALLOC_MAX_FREE_QUEUE_SIZE of few hundred MB or with TCMALLOC_RECLAIM_MEMORY=false Exiting with error code (instead...of crashing) because of whole-program memory leaks 第6行显示我们程序有1块16字节的空间泄漏。

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JavaScript 引擎性能比较之一SpiderMonkey

/configure –prefix=/usr –program-suffix=-2.13 make acdatadir=/usr/share/autoconf-2.13 make acdatadir.../configure # Use “mozmake” on Windows make make install ———— ../.....total_us; } // [SpiderMonkey 24] Use JSBool instead of bool. static bool debug_trace(JSContext *cx,...= 0; pFile = fopen(szFile, "r"); if (pFile == NULL) { fputs("File open error", stderr); return 1; }...); int status = 0; if (argc > 1) { char* buffer = NULL; int ret = load_file_malloc(argv[1], buffer);

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llama.cpp在各个操作系统本地编译流程

Make sure to have the CUDA toolkit installed....This allows swapping to system RAM instead of crashing when the GPU VRAM is exhausted....This allows swapping to system RAM instead of crashing when the GPU VRAM is exhausted....Make sure to have ROCm installed....For example for Ubuntu 22.04 you can install libvulkan-dev instead.

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malloc.c

"make posix" for Posix threads)....We ignore MORECORE return value, and instead call again to find out where new end of memory is....= NULL) { public_fREe(oldmem); return 0; } #endif /* realloc of null is supposed to be same...malloc_printerr (check_action, errstr, chunk2mem (victim)); return NULL; } #ifndef...) * MORECORE must not allocate memory when given argument zero, but instead return

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Python Debug(调试)的终极指南

self.x = x self.y = y self.radius = radius def __repr__(self): return...logging.warning(message) return message # Or raise some error instead 上面的实现非常简单，只返回和记录丢失键的消息...func() 现在，如果我们用-i参数运行它，我们就有机会调试它: # Run crashing application ~ $ python3 -i crashing_app.py Traceback...(most recent call last): File "crashing_app.py", line 9, in func() File "crashing_app.py..." # Make some changes to "func" >>> func() "This is result...

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Ubuntu_ROS中应用kinect v2笔记

make install Run the test program: ....Run the test program: ....Protonect works fine, but kinect2_bridge is still not working / crashing....If it is still crashing, compile it in debug and run it with gdb: cd catkin_make -DCMAKE_BUILD_TYPE...-DENABLE_CXX11=ON instead of cmake ..

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CC++ 获取 MAC 地址的几种方法

(sizeof(IP_ADAPTER_INFO)); if(pAdapterInfo == NULL) return false; // Make an initial call to GetAdaptersInfo...(ulOutBufLen); if (pAdapterInfo == NULL) return false; } if(GetAdaptersInfo(pAdapterInfo,...(outBufLen); if (pAddresses == NULL) return false; // Make an initial call to GetAdaptersAddresses...1; // Program has failed. } // Initialize hres = CoInitializeSecurity( NULL...1; // Program has failed. } // Use the IWbemServices pointer to make requests of

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Mac 安装 ClickHouse 报错： Mac 10.15.4: Cannot find objcopy

System ar will be used instead. It does not work with ThinLTO....System ranlib will be used instead....Otherwise KDevelop fails to navigate to correct file and opens a new file instead....System ar will be used instead. It does not work with ThinLTO.")...System ranlib will be used instead. It does not work with ThinLTO.")

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Python终极调试指南

__name__} - {new_message}" return wrapper return decorate # Example Usage @log(logging.WARN...logging.warning(message) return message # Or raise some error instead 上面的实现非常简单，仅返回并记录缺少键的消息...~ $ python3 -i crashing_app.py Traceback (most recent call last): File "crashing_app.py", line 9,.../crashing_app.py(7)func() -> raise SomeError("Something went wrong...")...importlib.reload(module) 以避免每次更改后都必须重新启动交互式会话： >>> import func from module >>> func() "This is result..." # Make

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js引擎v8源码解析之zone（基于0.1.5）

The chunks cannot be deallocated individually, but instead // the Zone supports deallocating all chunks...be private instead of // public, but unfortuately the compiler sometimes synthesizes // (unused)...clear_next() { next_ = NULL; } // 内存总大小 int size() const { return size_; } // 内存可用大小，前面有一个Segment...segment (if any). // 更新头指针 Segment::set_head(keep); } Address Zone::NewExpand(int size) { // Make...This // is to avoid excessive malloc() and free() overhead.

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C++内存泄漏排查：从基础到高级的完整工具指南

(vg_replace_malloc.c:299)==12345==by0x400567:obvious_leak()(program.cpp:15)==12345==by0x400583:main(program.cpp.../program3.2ASan泄漏检测示例收起代码语言：C++运行AI代码解释#includevoidleak_example(){void*ptr1=malloc(100);//泄漏...void*ptr2=malloc(200);//泄漏//忘记free}intmain(){leak_example();return0;}ASan输出：收起代码语言：TXTAI代码解释=========..._CRT_WARN,_CRTDBG_FILE_STDOUT);}intmain(){enable_memory_leak_detection();int*leak=newint(42);//会被检测到return0...(100);void*p2=calloc(10,20);//故意泄漏p2free(p1);muntrace();//结束跟踪return0;}运行：收起代码语言：BashAI代码解释exportMALLOC_TRACE

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三省吾身，移植代码问题记录

* context, char* topic_name, int topicLen, MQTTClient_message* message) { if (topic_name == NULL... || message == NULL) { return 0; } std::string str_topic = topic_name; char *data = (char ...*)malloc(message->payloadlen + 1); if (data == NULL){ return 0; } memcpy(data, message->payload.../configure --target=arm-linux-gnueabihf --host=arm-linux-gnueabihf --program-prefix=arm-linux-gnueabihf...- CC=arm-linux-gnueabihf-gcc --prefix=$PWD/tmp # make && make install alientek@ubuntu:~/broadcast_app

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Clang Static Analyzer

PATH:/usr/lib/llvm-18/bin" 我是放在~/.bashrc文件里面测试使用文件： https://github.com/hardik05/Damn_Vulnerable_C_Program.../llvm-18/bin/clang' for static analysis dvcp.c:62:5: warning: Attempt to free released memory [unix.Malloc...^~~~~~~~~~~ dvcp.c:67:14: warning: Use of memory after it is freed [unix.Malloc...~~~~~~~ ~~~~~~~~~~~~ dvcp.c:104:16: warning: Potential leak of memory pointed to by 'buff4' [unix.Malloc...and set it as your environment. # NOTE: if you want to develop CodeChecker, use the `venv_dev` target instead

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【POJ】1451 - T9（动态字典树 & dfs & STL）

Whenever none of the words in the dictionary match the given number sequence, print "MANUALLY" instead...) { q = (Trie *)malloc(sizeof(Trie)); q->clear(); p->next[id] = q; } p = p->next[id];...{ if (pos == goal + 1) //搜到最后比较词频 { if (p->v > maxx) { maxx = p->v; ans = temp; } return...n; int Case = 1; char t[111]; int num; //词频 scanf ("%d",&u); while (u--) { root = (Trie *)malloc...MANUALLY\n"); else printf ("%s\n",ans.c_str()); } printf ("\n"); } printf ("\n"); } return

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CVE-2017-16943 Exim UAF漏洞分析

. # 修改Makefile文件的第134行，把用户修改为当前服务器上存在的用户，然后编译安装 $ make && make install 然后再修改下配置文件/etc/exim/configure文件的第...The following is the gdb result of this PoC: Program received signal SIGSEGV, Segmentation fault....= NULL && CS block == CS bb + ALIGNED_SIZEOF_STOREBLOCK) { b->next = bb->next; pool_malloc..., 503, NULL, US"only RSET accepted now") > 0) return EOF; goto repeat_until_rset; }...，只有当上一次malloc 0x2000的内存用完或不够用时，才会再进行malloc 0xa 对齐-> 0x10 return next_yield = heap1+0x110 next_yield =

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CVE-2017-16943 Exim UAF漏洞分析

. # 修改Makefile文件的第134行，把用户修改为当前服务器上存在的用户，然后编译安装 $ make && make install 然后再修改下配置文件 /etc/exim/configure..., rdx -------------- > 0x46cf1b cmp qword ptr [rax + 8], rdx ------------ Program...= NULL && CS block == CS bb + ALIGNED_SIZEOF_STOREBLOCK) { b->next = bb->next; pool_malloc..., 503, NULL, US"only RSET accepted now") > 0) return EOF;...，只有当上一次malloc 0x2000的内存用完或不够用时，才会再进行malloc 0xa 对齐-> 0x10 return next_yield = heap1+0x110 next_yield =

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来自国外Kotin 布道师的完整版【Kotlin 简明教程】1Kotlin 开发者社区

Finally, we will put everything together to create a simple program....String = "Test" text = "Changing idea" // this is an error text = null The last assignment will make...if text is null (safe-call) then on the left there will be null, then the elvis operator will return...instead returns null in case the cast fails. val number = 27 var large: Double? = number as?...If the situation cannot be resolved the program ends abruptly.

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delphi使用bcb的c++ .obj .o，lazarus x64内联汇编，att和intel

var a:PansiChar; begin a:=testfn(); MessageBoxA(0,a,'t',MB_OK); end; File1. c char* testfn() { return...I only slightly modified it to make it compile with C++Builder....It will return information about if, and where in the string, it found text matching the pattern....Instead of writing all these functions yourself, you could also use functions from the Microsoft Visual...Using msvcrt.dll, instead of the code above, you could simply declare most of the routines external.

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GDB调试Segmentation Fault

(1return 1; 13: } --...That leaves us with 'buf': (gdb) print buf $1 = 0x0 The value of buf is 0x0, which is the NULL..., buf is NULL....If you were to go check the man page for malloc, you would discover that malloc returns NULL when it...The example also illustrated another very important point: ALWAYS CHECK THE RETURN VALUE OF MALLOC!

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点击加载更多

Ultimate Guide to Python Debugging

内存泄漏分析的利器——gperftools的Heap Checker

JavaScript 引擎性能比较之一SpiderMonkey

llama.cpp在各个操作系统本地编译流程

malloc.c

Python Debug(调试)的终极指南

Ubuntu_ROS中应用kinect v2笔记

CC++ 获取 MAC 地址的几种方法

Mac 安装 ClickHouse 报错： Mac 10.15.4: Cannot find objcopy

Python终极调试指南

js引擎v8源码解析之zone（基于0.1.5）

C++内存泄漏排查：从基础到高级的完整工具指南

三省吾身，移植代码问题记录

Clang Static Analyzer

【POJ】1451 - T9（动态字典树 & dfs & STL）

CVE-2017-16943 Exim UAF漏洞分析

CVE-2017-16943 Exim UAF漏洞分析

来自国外Kotin 布道师的完整版【Kotlin 简明教程】1Kotlin 开发者社区

delphi使用bcb的c++ .obj .o，lazarus x64内联汇编，att和intel

GDB调试Segmentation Fault

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