std::stacktrace

Use case

Capture callstack for debugging/logging.

Explanation

std::stacktrace::current() captures the call stack.

Code

// std::stacktrace is not fully implemented everywhere yet.
// https://en.cppreference.com/w/cpp/compiler_support/23.html
#if defined(__linux__)
#include <print>
#include <stacktrace>
#include <string_view>

void analyzeFunction(uint64_t addr) {
  std::println("Analyzing {:#x}", addr);
  std::println("Callstack:\n{}", std::stacktrace::current());
}

void processSection([[maybe_unused]] std::string_view name) {
  analyzeFunction(0x10001000);
}

int main() {
  processSection("__TEXT");
  return 0;
}
#else
int main() { return 0; }
#endif

View on GitHub.

Output

$ ./src/c++23/build/std-stacktrace
Analyzing 0x10001000
Callstack:
   0# analyzeFunction(unsigned long) at :0
   1# processSection(std::basic_string_view<char, std::char_traits<char> >) at :0
   2# main at :0
   3# __libc_start_call_main at ../sysdeps/nptl/libc_start_call_main.h:58
   4# __libc_start_main_impl at ../csu/libc-start.c:360
   5# _start at :0
   6#