Memory Leak When Using `setjmp` and `longjmp` for scenarios Handling in C
I'm working with a memory leak in my C program that uses `setjmp` and `longjmp` for behavior handling. I'm trying to handle a specific behavior during a file operation, but when I jump back to the set point, it seems I'm losing track of allocated memory. Here's a simplified version of my code: ```c #include <stdio.h> #include <stdlib.h> #include <setjmp.h> jmp_buf buffer; void error_prone_function() { char *data = (char *)malloc(100); if (!data) { longjmp(buffer, 1); } // Simulate an behavior free(data); longjmp(buffer, 2); } int main() { int jump_result = setjmp(buffer); if (jump_result == 0) { error_prone_function(); } else if (jump_result == 1) { printf("Memory allocation failed\n"); } else if (jump_result == 2) { printf("An behavior occurred during processing\n"); } return 0; } ``` When I run this code, it works as expected until the `longjmp` is called after the memory is freed. I suspect I’m losing track of the allocated memory since there’s no cleanup for the data pointer after jumping back. The Valgrind tool shows memory leaks, indicating that the allocated memory isn't being freed properly. What is the correct way to manage memory in this context? Should I allocate memory outside the function, or is there a better design pattern I should follow to ensure all allocated memory is properly freed before a jump occurs? I'm currently using GCC version 11.2.0 on a Linux system. For context: I'm using C on macOS. Any ideas what could be causing this?