28 VIEWS // can you please suggest changes. Dangling pointer: Memory out of bounds, using an address beyond the memory allocated to itself. After exploring the topic in depth, it is clear that the article delivers useful knowledge concerning Leetcode 中 Addresssanitizer Heap Buffer Overflow On Address 的 错误迷惑 程序员大本营. Most things that you can do wrong in a C++ program fall into the category of undefined behaviour. The problem is: You are given a sorted array consisting of only integers where every element appears exactly twice, except for oneLeetcode : AddressSanitizer heap-buffer-overflow. solution: pass a. 4K) Submissions. Heap overflow is when a program overruns a buffer allocated in the heap. Editorial. cpp:4:10 # 1 0xc48 in main+0xc48 (a. The test case is the array [2,7,11,15]. Solutions (630) Submissions. Ln 1, Col 1. AddressSanitizer: heap-buffer-overflow on address 0x602000000134 at pc 0x000000344869 bp 0x7ffc523c53f0 sp 0x7ffc523c53e8 WRITE of size 4 at 0x602000000134 thread T0 #2 0x7f60596fd0b2. Connect and share knowledge within a single location that is structured and easy to search. No more results. In this video we go over understanding a Heap Buffer Overflow as displayed by AddressSanitizer, which involves an out-of-bounds write. 2. AddressSanitizer: heap-buffer-overflow on address 0x603000000778 at pc 0x000000345efd bp 0x7ffc1c1fc3f0 sp. I noticed, this section here which is handling ( rank > 3) cases: ret [nums [1] [i]]= (char*)malloc (sizeof (char)*1); ret [nums [1] [i]] [0]='1'+i; You're allocating string array of size 1. Heap Buffer Overflow trying to reallocate memory. DesignError: stack-buffer-overflow. Return k after placing the final result in the first k slots of nums. other than this, there are certain errors in the code. Console. Sorted by: 0. 🔈. I think we have found four unique issues: two heap buffer overflows, one segmentation fault, and one assertion violation. It could be use of a variable that's no longer in scope via a dangling pointer, use of memory that has been free () d, memory that has been delete d or delete [], and more. AddressSanitizer: heap-buffer-overflow on address 0x603000000178 at pc 0x55979bc921c2 bp 0x7ffd997833a0 sp 0x7ffd99783390 READ of size 8 at. 1. 68. out” terminated by signal SIGSEGV (Address boundary error). Editorial. It calculates the new buffer size assuming that, in the worst case scenario, for every two UTF16 encoded input bytes it may need three UTF8 bytes [2]. /src/morsec. int le = strlen(s); int t. In pop the new value of head is visible only within that function, but not from the caller (it is passed by value). GenerateParentheses_Task22-main(7574,0x7ff84ea6f640) malloc: nano zone abandoned due to inability to reserve vm space. We'd only loop through the elements once ( O (N) time complexity) and we would record our indices. Connect and share knowledge within a single location that is structured and easy to search. A code sanitizer is a programming tool that detects bugs in the form of undefined or suspicious behavior by a compiler inserting instrumentation code at runtime. I am practicing the Leetcode question "Cells in a Range on an Excel Sheet". well, you allocate 5 bytes and store this pointer in temp, then you call strcpy which copies 6 bytes into that memory, which overflows it. 6. This double pointer parameter is causing heap-buffer-overflows, preventing my program from running to completion. Error: strncat-param-overlap. Maximal size (in bytes) of redzones around heap objects. 2. View jahanvi5475's solution of undefined on LeetCode, the world's largest programming community. LeetCode0. Fork 125. Editorial. Editorial. Interaction with other tools gdb. Programs containing such bugs might run flawlessly most of the. Register or Sign in. Actions. Share. AddressSanitizer can be used on C++ codes as well. Heap buffer overflow; Stack buffer overflow; Global buffer overflow; Use after return; Use after scope; Initialization order bugs;. I am practicing the Leetcode question "Cells in a Range on an Excel Sheet". Ln 1, Col 1. Dangling pointer: Memory out of bounds, using an address beyond the memory allocated to itself. 1 LeetCode ERROR: AddressSanitizer: heap-buffer-overflow. Back. But Heap overflow occurs when submitting. 题目描述 ：136题 只出现一次的数字 给定一个非空整数数组，除了某个元素只出现一次以外，其余每个元素均出现两次。. 🔈 LeetCode is hiring! Apply NOW. 1. This is the best place to expand your knowledge and get prepared for your next interview. These variables have language scope of global or file static. memory-management. All I could guess is that row variable has something wrong. e. 4. You're not allocating enough bytes for the string and its NUL-terminator byte. For a mapped memory region, AddressSanitizer uses shadow memory to track whether user bytes are unaddressable (poisoned): accesses are considered a bug (heap-buffer-overflow, heap-use-after-free, stack-buffer-overflow, stack-use-after-{return,scope}, etc). malloc (sizeof (char *) * ft_count_words (s, c) + 1) multiplies the size of a pointer by the number of words, then adds only 1 byte to that, not the size of a pointer. Share. Buffer Overflow ¶ Consider buffer. View mkmittal89's solution of undefined on LeetCode, the world's largest programming community. when i try to summitERROR: AddressSanitizer: heap-buffer-overflow on address 0x602000000114 at pc 0x000000406d27 bp 0x7ffc88f07560 sp 0x7ffc88f07558 READ of size 4 at 0x602000000114 thread T0 LeetCode No. So instead of allocating a fix number of 200 characters, you should. by calling strcpy ( newstr, "" ); after malloc () or by replacing malloc (200) with calloc (200,1) which fills the entire buffer with NUL. You must do this by modifying the input array in-place with O(1) extra memory. Running AddressSanitizer. 🔈 LeetCode is hiring! Apply NOW. Ln 1, Col 1. To learn more, see our tips on writing great. A2: Another, C-only option is accesses to global common symbols which are not protected by Asan (you can use -fno-common to disable generation of common symbols and hopefully detect more bugs). All suggest that it must be some potential overflow. size ()+1)/2] 出现了问题，可能 这里确实写得不好。. 2 AddressSanitizer report breakpoint hit: dynamic-stack-buffer-overflow. For example, the 1st column is denoted by 'A', the 2nd by 'B', the 3rd by 'C. ERROR: AddressSanitizer: heap-buffer-overflow on address X at pc Y bp Z sp W. forget to add +1 for nul byte. This is the best place to expand your knowledge and get prepared for your next interview. Leetcode : AddressSanitizer heap-buffer-overflow. I am really stuck with AddressSanitizer. 刚开始以为是sort函数Strict Weak Ordering 问题，后来发现是 major = nums [ (nums. This is the best place to expand your knowledge and get prepared for your next interview. Use-after-return (pass detect_stack_use_after_return=1 to. Surface Studio vs iMac – Which Should You Pick? 5 Ways to Connect Wireless Headphones to TV. View mark619park's solution of Two Sum on LeetCode, the world's largest programming community. Segmentation fault which accessing a map c++. Search a 2D Matrix: Write an efficient algorithm that searches for a value in an m x n matrix. Editorial. ulimit -v. Console. I noticed, this section here which is handling ( rank > 3) cases: ret [nums [1] [i]]= (char*)malloc (sizeof (char)*1); ret [nums [1] [i]] [0]='1'+i; You're allocating string array of size 1. Solutions (8. Error: stack-buffer-underflow. 0. ==43==Hint: this fault was caused by a dereference of a high value address (see register values. DesignI was having a similar problem with the std::vector(size_type size) constructor getting a false heap overflow. hpp:69:14 in char const* Sass::Prelexer::alternatives<&Sass::Prelexer::hexa, &(char const* Sass::Prelexer::sequence<&(char const. Thanks. Connect and share knowledge within a single location that is structured and easy to search. In addition to that, you only allocate 100 char per string, which, looking at the LeetCode description, matches the maximum length of 100, but doesn't leave room for the NULL terminator. View quater_nion's solution. using malloc ()). Got it. Editorial. View sajohn's solution of undefined on LeetCode, the world's largest programming community. I'm getting crashes due to memory errors after adding a new shared_ptr instance variable in an existing containing class. bsearch(v,0,m-1,q[i]) assumes that the size of v is at least m. 1 问题背景 1 在做leetcode时，总是会遇到关于“heap-buffer-overflow”的问题； 2 下面对这些场景进行归纳，提出潜在检查点，以及尝试揭示出其内在原理； 1. Sign in. I am practicing the Leetcode question "Next Greater Node in Linked List" and here is my code: #define. Hot Network Questions Are curve secp256k1 ECDSA signatures distinguishable from random data?ERROR: AddressSanitizer: heap-buffer-overflow on address X at pc Y bp Z sp W. 6+0x202e0) 0x602000000060 is located 0 bytes to the right of 16-byte region [0x602000000050. Ln 1, Col 1. Here is the code I think it's malloc creating the pointer, but I don't know why it's wrong, I think the details are I am doing leetcode 540. Besides, as @stevesummit has mentioned, despite its declaration there is no guarantee, that strlen (str) < 50. Closed evilpan opened this issue Jun 8, 2023 · 1 comment. This is the best place to expand your knowledge and get prepared for your next interview. There is no reason for this, as using new is less efficient than what you're doing now. Error: stack-use-after-return. [Solved] The "ERROR: AddressSanitizer: heap-buffer-overflow on address" - Reverse Linked List - LeetCode Editorial Solutions (12. c: #include <stdio. So you should move that declaration inside the function, so that last is initialised at each run of the function. AddressSanitizer heap-use-after-free on address 0x7f7ddab8c084 at pc 0x403c8c bp 0x7fff87fb82d0 sp 0x7fff87fb82c8 READ of size 4 at 0x7f7ddab8c084 thread T0 #0 0x403c8c in main example_UseAfterFree. View quater_nion's solution of undefined on LeetCode, the world's largest programming community. 3. / a. When I run my code on DEVC++ it works perfectly fine, but when I try to run on leetcode it gives this " Weird runtime error: heap-buffer-overflow - undefined - LeetCode. The final code is given below: class Solution { public: void setZeroes (vector<vector<int>>& matrix) { int x=1, y=1; int m=matrix. See also. Ln 1, Col 1. They're allocated in memory before main () starts. Again, the rest of this report describes the layout of the heap, and probably isn't too important for your use case. 找出那个只出现了一次的元素。. AddressSanitizer: heap-buffer-overflow on address - Island Perimeter - LeetCode. c. 0. Leetcode 报错 Addresssanitizer Heap Buffer Overflow On Address Universal in its appeal, this image weaves a mesmerizing tapestry of details and hues that transcends specialized interests, captivating a diverse audience. 3. quickSort (*intervals, 0, (intervalsSize-1)*2); which passes only intervals [0] is inadequate; instead intervals has to be. Q&A for work. View Madhushala's solution of undefined on LeetCode, the world's largest programming community. AddressSanitizer, ThreadSanitizer, MemorySanitizer - google/sanitizers. Description. If the input string is very big it may result in stack overflow. Sorry for this messy code, but I have a question. Q&A for work. View alok29awasthi's solution of undefined on LeetCode, the world's largest programming community. View mananbordia's solution of undefined on LeetCode, the world's largest programming community. This is the best place to expand your knowledge and get prepared for your next interview. All. Buffer overflow or buffer overrun occurs when a program overruns a buffer’s boundary and overwrites adjacent memory locations. c works fine at my computer but gets address sanitizer heap buffer overflow errors on leetcode to access my live chat neetcode. View charlieChuanyiHuang's solution of undefined on LeetCode, the world's largest programming community. Exact overhead depends on the allocations sizes. Editorial. Solutions (26. Solution. To correctly use short-circuiting you want to put your edge case checking at the far left,. Note: This answer does not take into account the correctness of the algorithm. Therefore, the call. size () 二维矩阵 matrix 的索引 i 和 j ，i 的范围是 0 <= i < matrix. Solutions (8. 4K). Related questions. Leetcode : AddressSanitizer heap-buffer-overflow. Also you don't check if malloc returned a NULL pointer. All. ERROR: AddressSanitizer: heap-buffer-overflow on address X at pc Y bp Z sp W. canonical raft Public. 说明： 你的算法应该. In the argument. Leetcode : AddressSanitizer heap-buffer-overflow. There are over 6000 assert () statements in SQLite. C++ Delete Mismatch. 4K) Submissions. View ctci07's solution of Longest Palindromic Substring on LeetCode, the world's largest programming community. Description. Description. 72. the assumption intervals [i]+2 == intervals [i+1] is wrong. Learn more about TeamsFind centralized, trusted content and collaborate around the technologies you use most. so there would be *returnSize number of 2s). in this video we go over understanding a heap buffer overflow as displayed by addresssanitizer, which involves an c : error: addresssanitizer: heap buffer overflow on address x at pc y bp z sp w to access my live chat page, on google, c : c works fine at my computer but gets address. Level up your coding skills and quickly land a job. Running AddressSanitizer. Description. Description. AddressSanitizer: heap-buffer-overflow on address 0x6020000000b4 at pc 0x0000003a86fc bp 0x7ffeebd5f9d0 sp. – Igor Tandetnik. 关于LeetCode AddressSanitizer: heap-buffer-overflow on address问题. The smaller the allocations you make the bigger the overhead is. Heap Buffer Overflows. 2 AddressSanitizer 1 快速内存错误检测工具； 2 这里还提供一种方法，进行本地安装和调试； 3 那么. ramosian-glider commented on Aug 31, 2015. ASan 是一种结合编译器插桩和运行时的一种快速内存检测工具，主要用于检测代码中的部分 内存安全 问题: 缓冲区溢出, ASan 提供 stack-buffer-underflow, stack-buffer-overflow, heap-buffer-underflow, heap-buffer-overflow, global-buffer-overflow 情况下的检测. View sajohn's solution of undefined on LeetCode, the world's largest programming community. If you use indexes make them valid, if. 1 Answer. heap_buffer_overflow. This is the best place to expand your knowledge and get prepared for your next interview. Its enchanting fusion of elements. When I ran this code getting address overflow. The problem is that you have defined last as a global variable, and so when multiple tests are run, that global variable will not always be NULL when the function starts to do its thing, yet that is what your logic expects. LeetCode - The World's Leading Online Programming Learning Platform. Example - classic heap buffer overflow. 1 Answer. could be an AI. ==11500==ERROR: AddressSanitizer: heap-buffer-overflow on address 0x02d39598 at pc 0x706587af bp 0x00b6fabc sp 0x00b6fab0 READ of size 4 at 0x02d39598 thread T0 #0 0x706587ae in do_check_string F:gitPopensslopensslcryptox509v3_utl. View mark619park's solution of undefined on LeetCode, the world's largest programming community. Q&A for work. We are testing grammar-based fuzzers and have chosen SQLite3 as one of our fuzz targets for our experiments. Read overflow either crash immediately or don't have consequences, whereas write overflow may cause corruption that would trigger. AddressSanitizer (ASan) is a widely-used debugging tool to detect memory access errors. This code runs on my IDE but not Leetcode which returns "heap-buffer-overflow" Load 7 more related questions Show fewer related questions 0 Level up your coding skills and quickly land a job. c:83 #1 0x7fcb73b4193c in morsec . View mark619park's solution of undefined on LeetCode, the world's largest programming community. Stack Overflow. 6%) of the resolved heap-buffer overflows are marked as fixed or a duplicate of an. It helps to detect issues like use-after-free, various kinds of buffer overruns in C/C++ programs, and other. Your calling code in your test harness should be using for (int i = 0; i < returnSize; i++) in the printing loop (after you pass &returnSize to the function), but I. in this video we go over understanding a heap buffer overflow as displayed by addresssanitizer, which involves an a short introduction to buffer overflows. I'm running clang 4. 1. is giving the buffer overflow over a data created inside: memoryDeque. ===== ==9726==ERROR: AddressSanitizer: attempting double-free on 0x602000000430 in thread T0: #0 0x10db9dee9 in wrap_free+0xa9 (libclang_rt. . I'm trying to figure out the problem. AddressSanitizer: heap-use-after-free on address 0x603000000050 at pc 0x7fcb73b40682 bp 0x7ffffcfd8370 sp 0x7ffffcfd8368 READ of size 8 at 0x603000000050 thread T0 #0 0x7fcb73b40681 in clear_dict . (heap) Use after free: 访问堆上已被释放的内存: Heap buffer overflow: 堆上缓冲区访问溢出: Stack buffer overflow: 栈上缓冲区访问溢出: Global buffer overflow: 全局缓冲区访问溢出: Use after return: 访问栈上已被释放的内存: Use after scope: 栈对象使用超过定义范围: Initialization order bugs. Heap Buffered Overflow : With custom comparator - undefined - LeetCode. DesignNext, there's information about the shadow bytes in the vicinity of the buffer overflow. Asking for help, clarification, or responding to other answers. Closed evilpan opened this issue Jun 8, 2023 · 1 comment. See also. 0. Editorial. Solutions (7. Here's my code for Leetcode 1366, and it doesn't work for some test cases such as ["XYZ","XZY"] I'm pretty sure about the algorithm, i. C SOLUTION -- Runtime Error--->AddressSanitizer: heap-buffer-overflow - 3Sum - LeetCode. Unable to load the solution. ERROR: ERROR: AddressSanitizer: heap-buffer-overflow on address What I have tried:Smart Living Transform Your Home with These Cutting-Edge GadgetsLeetCode错误：地址消毒剂：堆缓冲区溢出. Design背景，不同场景，内在原理，参考文献 一、背景 1. Leetcode : AddressSanitizer heap-buffer-overflow. out ===== == 28566 == ERROR: AddressSanitizer: stack-buffer-overflow on address 0x7ffe6256d1fa at pc 0x7fbbab43705f bp 0x7ffe6256d0c0 sp 0x7ffe6256c850 WRITE of size 39 at 0x7ffe6256d1fa thread T0 #0 0x7fbbab43705e in vsprintf (/lib64/libasan. But I have no idea what is the problem. Basically when array is too long memory corruption shows up as there is heap buffer overflow. The reported global-buffer-overflow is caused by the instrumentation. cc:5 #1. It is represented by alphabetical letters. size ()即可. AddressSanitizer uses more stack memory. Solutions (630) Submissions. [HELP] gives heap overflow but works fine on local machine. You may try more sophisticated. AddressSanitizer overview AddressSanitizer known issues AddressSanitizer build and language reference AddressSanitizer runtime reference. This results in undefined behavior 2 when i reaches -1 (access out of bounds) and one of the worst outcome of UB is IMHO a program seemingly producing. s[i - j] == s[i + j] && (i - j) >= 0 It first looks at s[i - j] == s[i + j] and if this evaluates to false then it stops evaluating and skips to the else portion of the condition. even if it works well in Terminal on Mac. GenerateParentheses_Task22-main(9726,0x7ff84ea6f640) malloc: nano zone abandoned due to inability to reserve vm space. Ln 1, Col 1. Dereferencing ans is undefined behavior. But you don't actually want an array in this case, as returning a pointer to local memory will be invalid once the function returns. 6K) Submissions. Ln 1, Col 1. I see that you're trying to solve with constant memory, I guess. Rotate Array: Given an array, rotate the array to the right by k steps, where k is non-negative. 0】Buffer-Overflow Attack; org. will appreciate any comments or helps on it! c;. We have seen up to 3x increase. Ln 1, Col 1. I don't see that ov. Running AddressSanitizer. dylib:x86_64h+0x48ee9) (BuildId. When I run with the AddressSanitizer in. Weird runtime error: heap-buffer-overflow - undefined - LeetCode. Leetcode : AddressSanitizer heap-buffer-overflow. A heap buffer overflow is when you access outside an array that was allocated on the heap (i. Leetcode : AddressSanitizer heap-buffer-overflow. 1 Answer. The compiler generates metadata for any variable in the . Console. Therefore, the call. 4 AddressSanitizer: heap-use-after-free ANSI C. LeetCode question in C: Heap overflow when using Dynamic Memory Allocation in debug vs. Description. Even if we consider ranks will be single digit only, this is wrong. solving leetcode 1658, minimum operations to reduce x to zero, today's daily leetcode problem on september 19. Learn more about Teamsheap-buffer-overflow in ZXing::DataMatrix::DMRegressionLine::modules #572. Source examples and live debug screenshots for heap variable overflow errors. Leetcode报错AddressSanitizer: heap-buffer-overflow on address 0x603000000028. Here is the problem: A cell (r, c) of an excel sheet is represented as a string "<col><row>" where: <col> denotes the column number c of the cell. AddressSanitizer: heap-buffer-overflow on address 0x608000000308 at pc 0x00000038d06a bp 0x7ffe00621720. GenerateParentheses_Task22-main(9726,0x7ff84ea6f640) malloc: nano zone abandoned due to inability to reserve vm space. Again, the rest of this report describes the layout of the heap, and probably isn't too important for your use case. Editorial. C++ works fine at my computer but gets address sanitizer heap-buffer-overflow errors on leetcode. AddressSanitizer: heap-buffer-overflow. Diagnostics detected issues [cpp. The issue has been resolved. View 15584352617's solution of 3Sum on LeetCode, the world's largest programming community. size()The exit condition prevents the loop from ever entering if there are less than 2 elements in count making underflowing the buffer impossible. C LanguageC Code Please Help me AddressSanitizer: heap-buffer. BTW: Be careful about using VLAs like char c [len];. No more results. Example - strncpy into heap. report_globals: 1: Controls the way to handle globals (0 - don't detect buffer overflow on globals, 1 - detect buffer overflow, 2 - print data about registered globals). So on the third iteration, when you go on to access students [0] (because j is always 0), you will be accessing. I am coding a solution for LeetCode problem 74. 2. ASan runs on both 32-bit and 64-bit ARM, plus x86 and x86-64. Example: educators, technical writers, and project/program managers. 5K) Submissions. I referenced the link: Error: dynamic-stack-buffer-overflow and got the idea it's due to an out-of-bound index reference. I have no clue where to look into. AddressSanitizer uses more stack memory. another reason why we need chadstr even for buffer allocation 👍 2 sneedcat and huglovefan reacted with thumbs up emoji 👎 2 DBJDBJ and huglovefan reacted with thumbs down emoji 😄 5 shaadx-coding, melvyn2, DarrienG, mindless-smoking-cat, and sneedcat. _0c at pc 0x556c1efbb1e8 bp 0x7ffca0f59c60 sp 0x7ffca0f59c50 read of size 4 aAddresssanitizer Tutorial 3 Heap Buffer Overflow. These relationships are. AddressSanitizer (ASAN) has APIs for poisoning and unpoisoning memory, intended for integration with a custom allocator. It refers to using memory after it has been freed by any means. 文章目录前言一、stack-buffer-overflow解决方法二、heap-buffer-overflow解决方法总结 前言 在leetcode中使用C语言做题时，可能会出现stack-buffer-overflow或者heap-buffer-overflow的问题，在这里，我记录一下自己遇到此类错误时一般的出错原因。一、stack-buffer-overflow 我没有截图可以放上来，大家的错误信息应该. In particular, the section on Y stands out as particularly. Nov 16, 2019. C Code Please Help me AddressSanitizer: heap-buffer. Sort by. 7K) Submissions. Learn more about Collectives. When I run the resulted executable the fuzzer finds a heap-buffer overflow due to an invalid read--in particular while trying to copy the second byte in memcpy. Address Sanitizer는 compiler instrumentation과 directly-mapped shadow memory를 기반으로 동작합니다. If the input string is very big it may result in stack overflow. Leetcode : AddressSanitizer heap-buffer-overflow. Editorial. io a better way to prepare for coding interviews twitter: twitter neetcode1 discord: c : c works fine at my computer but gets. AddressSanitizer: heap-use-after-free on address 0x614000000040 at pc 0x00010d471df0 bp 0x7ffee278e6b0 sp 0x7ffee278e6a8 READ of size 4 at 0x614000000040 thread T0 #0 0x10d471def in main. Not sure about your bug, but here is an efficient working solution for the Two Sum problem: We use an unordered_map for mapping our indices. C++ Delete Mismatch. 背景，不同场景，内在原理，参考文献 一、背景 1. 首先. e. I believe the problem is related to 32-bit / 64-bit inodes (_DARWIN_FEATURE_64_BIT_INODE is not defined when I build Qt for some reason). View Acercool's solution of undefined on LeetCode, the world's largest programming community. So something like this: ASAN_OPTIONS=symbolize=1. Load 7 more related. Level up your coding skills and quickly land a job. Ln 1, Col 1. AddressSanitizer 被用来检查内存的非法访问，在 leetcode 中出现 AddressSanitizer: heap-buffer-overflow on address 类似报错，主要原因可能是存在数组越界。 一维数组 num的索引 i 的范围为 0 <= i < num. I want ASan not to flag heap buffer overflow - read for now, while still flagging heap buffer overflow - write. It helps to detect issues like use-after-free, various kinds of buffer overruns in C/C++ programs, and other similar. 1 问题背景 1 在做leetcode时，总是会遇到关于“heap-buffer-overflow”的问题； 2 下面对这些场景进行归纳，提出潜在检查点，以及尝试揭示出其内在原理； 1. When compiled with address Sanitizer it show that: ==4097==ERROR: AddressSanitizer: heap-buffer-overflow on address 0x6140000001d0 at pc 0x00010aa396fe bp 0x7ffee51c5c50 sp 0x7ffee51c5c48 READ of size 4 at. Source examples and live debug screenshots for alloca errors. Here is my solution: char* intToRoman(int num) { char numerals[] = { 'M', 'D', 'C', 'L', 'X', 'V', 'I' }; int numeral.