Memory Leak When Using `strdup` in a Threaded C Program on macOS
I'm a bit lost with I'm wondering if anyone has experience with I'm wondering if anyone has experience with I'm working on a project and hit a roadblock. I'm experiencing a memory leak in my multithreaded C application running on macOS Monterey (version 12.6). The scenario arises when I use `strdup` to duplicate a string received from a thread's arguments. After running the program with `valgrind`, it reports that memory allocated by `strdup` is not being freed. I have checked my code, and while I'm freeing the string after it's no longer needed, it seems like I'm missing something in the thread management. Here's a simplified version of my code: ```c #include <stdio.h> #include <stdlib.h> #include <string.h> #include <pthread.h> void *thread_function(void *arg) { char *input = (char *)arg; char *duplicated_str = strdup(input); if (!duplicated_str) { perror("strdup failed"); return NULL; } printf("Duplicated string: %s\n", duplicated_str); // Simulating some work sleep(1); free(duplicated_str); // Here I believe the memory should be freed return NULL; } int main(void) { pthread_t thread; const char *str = "Hello, World!"; if (pthread_create(&thread, NULL, thread_function, (void *)str) != 0) { perror("Failed to create thread"); return 1; } pthread_join(thread, NULL); return 0; } ``` I am confident that the `free(duplicated_str);` line is reached and executed, but `valgrind` still indicates that there's a memory leak. I suspect it might have something to do with how I'm handling the thread's execution or possibly the way I'm passing arguments. Can anyone guide to identify what could be going wrong here? Thanks in advance! This is part of a larger service I'm building. I'd really appreciate any guidance on this. Thanks for your help in advance! Any pointers in the right direction? I'm coming from a different tech stack and learning C. Is there a simpler solution I'm overlooking?