I’m learning C++, and on LeetCode, converting a char[] to a string gives a AddressSanitizer: stack-buffer-overflow error. string test1() /* Line 70 */ { char test[] = "11"; return string(test); } string test2() /* Line 76 */ { char test[] = {‘1’, ‘1’}; return string(test); } int main() { cout << test1() << endl; cout ..
Category : address-sanitizer
I’m writing a function that basically wraps recv: ssize_t recv(int sockfd, void *buf, size_t len, int flags); In particular, I want to write to receive some bytes; and sometimes these bytes will be part of an ASCII string, other times they will be integers, or maybe just plain "bytes" that are part of some higher-level ..
I need to set address sanitizers for my Visual Studio project via my CMake file. I can’t make use of the GUI option for enabling sanitizers in VS since I need sanitizers to be enabled in my CI/CD flow. Source: Windows Que..
Is it valid to call handle.destroy() from within the final suspension of a C++ coroutine? From my understanding, this should be fine because the coroutine is currently suspended and it won’t be resumed again. Still, AddressSanitizer reports a heap-use-after-free for the following code snippet: #include <experimental/coroutine> #include <iostream> using namespace std; struct final_awaitable { bool ..
When running my program with ASAN, I’m getting an error when using std::ostringstream. Something special with the program is that it’s overriding the new and delete operators. The following code is a simplified repro case: #include <sstream> char big_chunk[1000000]; char* alloc = big_chunk; void *operator new(std::size_t sz) { char* a = alloc; alloc += ((sz ..
The code below is for leetcode problem Reconstruct Itinerary : class Solution { public: vector<string> res; unordered_map<string,set<string>> g; vector<string> findItinerary(vector<vector<string>>& tickets) { for(vector<string> tkt: tickets){ g[tkt[0]].insert(tkt[1]); } res.push_back("JFK"); dfs("JFK"); return res; } void dfs(string u){ for(string v: g[u]){ res.push_back(v); g[u].erase(g[u].begin()); dfs(v); } } }; I am getting an error Address Sanitizer. Please help in resolving ..
In a previous question, it was discovered that using recent versions of GNU libstdc++ to read a series of numbers from a space-separated human-readable file (mirror) causes a ton of allocations, scaling linearly with the size of the file. Given the file linked above and this test program: #include <fstream> int main(int, char**) { std::ifstream ..
Modern C/C++ compilers including g++, clang supports AddressSanitizerLeakSanitizer function by appending -fsanitize=leak to compiler / linker flags and it is very useful for finding potential memory leaks before releasing C++ project. I wonder if there is performance impact when the option is enabled compared to the same program without it. If there is, how does ..
I try to run AddressSanitizer in a single cpp file with command clang++ -O1 -g -fsanitize=address -fno-omit-frame-pointer test.cpp but i am getting the following linking error Creating library a.lib and object a.exp LINK : fatal error LNK1561: entry point must be defined clang++: error: linker command failed with exit code 1561 (use -v to see ..
I’m using a C++ library from Go via SWIG. SWIG does not take care of memory management, so the Go side looks something like this: f := NewFoo() defer DeleteFoo(f) It’s easy enough to call DeleteFoo(f) when I created f, but it’s easy to omit it for return values from C++ functions. I want to ..
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