test

mt.cpp

@@ -0,0 +1,44 @@
+#include <cassert>
+#include <cstdint>
+#include <cstdlib>
+#include <atomic>
+#include <iostream>
+#include <thread>
+#include <vector>
+
+static std::atomic<uint64_t> count;
+static std::atomic<int> threads_launched;
+
+static void run(int num_threads, int num_iterations)
+{
+    threads_launched++;
+    while (threads_launched != num_threads) {
+        /* active wait */
+    }
+
+    uint64_t res = 0;
+    for (int i = 0; i < num_iterations; ++i) {
+        res += 1;
+    }
+    count += res;
+}
+
+int main(int argc, char *argv[])
+{
+    if (argc != 3) {
+        std::cout << "usage: num_threads num_iterations\n";
+        exit(EXIT_FAILURE);
+    }
+
+    const int num_threads = std::stoi(argv[1]);
+    const int num_iterations = std::stoi(argv[2]);
+    std::vector<std::thread> threads;
+
+    for (int i = 0; i < num_threads; ++i) {
+        threads.push_back(std::thread(run, num_threads, num_iterations));
+    }
+    for (auto & t : threads) {
+        t.join();
+    }
+    assert(count == num_iterations * num_threads);
+}

test.sh

@@ -0,0 +1,34 @@
+#!/usr/bin/env bash
+
+set -eu
+
+./build.sh
+
+ARCH=${ARCH:-amd64}
+qemu_system_args=
+if [ "$ARCH" == amd64 ]; then
+    qemu_suffix=x86_64
+elif [ "$ARCH" == i386 ]; then
+    qemu_suffix=i386
+elif [ "$ARCH" == arm64v8 ]; then
+    qemu_suffix=aarch64
+    qemu_system_args="-M virt"
+fi
+
+gui_run=$(which xvfb-run || true)
+
+g++ mt.cpp -o build/mt
+
+qemu_user=./build/qemu-$qemu_suffix
+qemu_system="./build/qemu-system-$qemu_suffix $qemu_system_args"
+bin="build/mt 17 1000" # 17 threads, 1000 iterations
+$qemu_user -plugin build/tests/tcg/plugins/libinline.so -d plugin "$@" $bin
+#$qemu_user -plugin build/tests/tcg/plugins/libinline.so "$@" \
+#  -d op,op_opt,in_asm,out_asm $bin |& head -n 1000 > build/plugin.on
+#$qemu_user "$@" -d op,op_opt,in_asm,out_asm $bin |&
+# head -n 1000 > build/plugin.off
+echo -----------------------------------------
+#$gui_run timeout --preserve-status 2 $qemu_system\
+#    -plugin build/tests/plugin/libinline.so -smp 8
+#vim build/plugin_sys
+#vimdiff build/plugin.*