feat add spdlog

src/breakpad_test.cc

@@ -0,0 +1,52 @@
+#include "client/linux/crash_generation/crash_generation_server.h"
+#include "client/linux/handler/exception_handler.h"
+#include "client/linux/handler/minidump_descriptor.h"
+
+#include <sys/stat.h>
+#include <sys/wait.h>
+
+void OnClientDumpRequestCallback(void *context, const google_breakpad::ClientInfo *client_info, const string *file_path)
+{
+    printf("dump to: %s\n", file_path->c_str());
+}
+
+bool CrashCallback(const google_breakpad::MinidumpDescriptor &descriptor, void *context, bool succeeded)
+{
+    printf("dump to: %s\n", descriptor.path());
+    return succeeded;
+}
+void crash()
+{
+    int *a = nullptr;
+    *a = 1;
+}
+
+int main()
+{
+    int server_fd;
+    int client_fd;
+    std::string dump_path = ".";
+    google_breakpad::CrashGenerationServer::CreateReportChannel(&server_fd, &client_fd);
+    pid_t pid = fork();
+    if (pid > 0)
+    {
+        close(client_fd);
+        printf("Server \n");
+        google_breakpad::CrashGenerationServer server(server_fd, OnClientDumpRequestCallback, nullptr, nullptr, nullptr,
+                                                      true, &dump_path);
+        server.Start();
+        int status = 0;
+        waitpid(pid, &status, 0);
+        server.Stop();
+    }
+    else
+    {
+        close(server_fd);
+        printf("Client\n");
+        google_breakpad::MinidumpDescriptor descriptor(server_fd);
+        google_breakpad::ExceptionHandler h(descriptor, nullptr, CrashCallback, nullptr, true, client_fd);
+        printf("Client crash\n");
+        crash();
+    }
+    return 0;
+}

src/calc_benchmark.cc

@@ -1,10 +1,12 @@
 #include "calc.h"
 #include <benchmark/benchmark.h>
 
-static void
-BM_Add(benchmark::State &state)
+static void BM_Add(benchmark::State &state)
 {
-    while (state.KeepRunning()) { Add(1, 2); }
+    while (state.KeepRunning())
+    {
+        Add(1, 2);
+    }
 }
 
 BENCHMARK(BM_Add);

src/metric_server.cc

@@ -0,0 +1,67 @@
+#include <prometheus/counter.h>
+#include <prometheus/exposer.h>
+#include <prometheus/registry.h>
+
+#include <array>
+#include <chrono>
+#include <cstdlib>
+#include <memory>
+#include <string>
+#include <thread>
+
+int main()
+{
+    using namespace prometheus;
+
+    // create an http server running on port 8080
+    Exposer exposer{"127.0.0.1:8080"};
+
+    // create a metrics registry
+    // @note it's the users responsibility to keep the object alive
+    auto registry = std::make_shared<Registry>();
+
+    // add a new counter family to the registry (families combine values with the
+    // same name, but distinct label dimensions)
+    //
+    // @note please follow the metric-naming best-practices:
+    // https://prometheus.io/docs/practices/naming/
+    auto &packet_counter =
+        BuildCounter().Name("observed_packets_total").Help("Number of observed packets").Register(*registry);
+
+    // add and remember dimensional data, incrementing those is very cheap
+    auto &tcp_rx_counter = packet_counter.Add({{"protocol", "tcp"}, {"direction", "rx"}});
+    auto &tcp_tx_counter = packet_counter.Add({{"protocol", "tcp"}, {"direction", "tx"}});
+    auto &udp_rx_counter = packet_counter.Add({{"protocol", "udp"}, {"direction", "rx"}});
+    auto &udp_tx_counter = packet_counter.Add({{"protocol", "udp"}, {"direction", "tx"}});
+
+    // add a counter whose dimensional data is not known at compile time
+    // nevertheless dimensional values should only occur in low cardinality:
+    // https://prometheus.io/docs/practices/naming/#labels
+    auto &http_requests_counter =
+        BuildCounter().Name("http_requests_total").Help("Number of HTTP requests").Register(*registry);
+
+    // ask the exposer to scrape the registry on incoming HTTP requests
+    exposer.RegisterCollectable(registry);
+
+    for (;;)
+    {
+        std::this_thread::sleep_for(std::chrono::seconds(1));
+        const auto random_value = std::rand();
+
+        if (random_value & 1)
+            tcp_rx_counter.Increment();
+        if (random_value & 2)
+            tcp_tx_counter.Increment();
+        if (random_value & 4)
+            udp_rx_counter.Increment();
+        if (random_value & 8)
+            udp_tx_counter.Increment();
+
+        const std::array<std::string, 4> methods = {"GET", "PUT", "POST", "HEAD"};
+        auto method = methods.at(random_value % methods.size());
+        // dynamically calling Family<T>.Add() works but is slow and should be
+        // avoided
+        http_requests_counter.Add({{"method", method}}).Increment();
+    }
+    return 0;
+}