foundationdb/fdbserver/SigStack.cpp

#include "flow/flow.h"
#include <csignal>
#include <iostream>
#include <string_view>

// This is not yet correct, as this is not async safe
// However, this should be good enough for an initial
// proof of concept.
extern "C" void stackSignalHandler(int sig) {
    auto stack = getActorStackTrace();
    int i = 0;
    while (!stack.empty()) {
        auto s = stack.top();
        stack.pop();
        std::string_view n(reinterpret_cast<const char*>(s.begin()), s.size());
        std::cout << i << ": " << n << std::endl;
        ++i;
    }
}

void setupStackSignal() {
    std::signal(SIGUSR1, &stackSignalHandler);
}