vendor/lldb/lldb-trunk-r256945

1 files changed, 121 insertions, 0 deletions

diff --git a/packages/Python/lldbsuite/test/functionalities/watchpoint/watchpoint_set_command/main.cpp b/packages/Python/lldbsuite/test/functionalities/watchpoint/watchpoint_set_command/main.cpp
new file mode 100644
index 000000000000..796c0ef359df
--- /dev/null
+++ b/packages/Python/lldbsuite/test/functionalities/watchpoint/watchpoint_set_command/main.cpp
@@ -0,0 +1,121 @@
+//===-- main.cpp ------------------------------------------------*- C++ -*-===//
+//
+//                     The LLVM Compiler Infrastructure
+//
+// This file is distributed under the University of Illinois Open Source
+// License. See LICENSE.TXT for details.
+//
+//===----------------------------------------------------------------------===//
+
+#include <chrono>
+#include <condition_variable>
+#include <cstdio>
+#include <random>
+#include <thread>
+
+std::default_random_engine g_random_engine{std::random_device{}()};
+std::uniform_int_distribution<> g_distribution{0, 3000000};
+std::condition_variable g_condition_variable;
+std::mutex g_mutex;
+int g_count;
+
+char *g_char_ptr = nullptr;
+
+void
+barrier_wait()
+{
+    std::unique_lock<std::mutex> lock{g_mutex};
+    if (--g_count > 0)
+        g_condition_variable.wait(lock);
+    else
+        g_condition_variable.notify_all();
+}
+
+void
+do_bad_thing_with_location(unsigned index, char *char_ptr, char new_val)
+{
+    unsigned what = new_val;
+    printf("new value written to array(%p) and index(%u) = %u\n", char_ptr, index, what);
+    char_ptr[index] = new_val;
+}
+
+uint32_t
+access_pool (bool flag = false)
+{
+    static std::mutex g_access_mutex;
+    static unsigned idx = 0; // Well-behaving thread only writes into indexs from 0..6.
+    if (!flag)
+        g_access_mutex.lock();
+
+    // idx valid range is [0, 6].
+    if (idx > 6)
+        idx = 0;
+
+    if (flag)
+    {
+        // Write into a forbidden area.
+        do_bad_thing_with_location(7, g_char_ptr, 99);
+    }
+
+    unsigned index = idx++;
+
+    if (!flag)
+        g_access_mutex.unlock();
+    return g_char_ptr[index];
+}
+
+void
+thread_func (uint32_t thread_index)
+{
+    printf ("%s (thread index = %u) startng...\n", __FUNCTION__, thread_index);
+
+    barrier_wait();
+
+    uint32_t count = 0;
+    uint32_t val;
+    while (count++ < 15)
+    {
+        // random micro second sleep from zero to 3 seconds
+        int usec = g_distribution(g_random_engine);
+        printf ("%s (thread = %u) doing a usleep (%d)...\n", __FUNCTION__, thread_index, usec);
+        std::this_thread::sleep_for(std::chrono::microseconds{usec});
+
+        if (count < 7)
+            val = access_pool ();
+        else
+            val = access_pool (true);
+
+        printf ("%s (thread = %u) after usleep access_pool returns %d (count=%d)...\n", __FUNCTION__, thread_index, val, count);
+    }
+    printf ("%s (thread index = %u) exiting...\n", __FUNCTION__, thread_index);
+}
+
+
+int main (int argc, char const *argv[])
+{
+    g_count = 4;
+    std::thread threads[3];
+
+    g_char_ptr = new char[10]{};
+
+    // Create 3 threads
+    for (auto &thread : threads)
+        thread = std::thread{thread_func, std::distance(threads, &thread)};
+
+    struct {
+        int a;
+        int b;
+        int c;
+    } MyAggregateDataType;
+
+    printf ("Before turning all three threads loose...\n"); // Set break point at this line.
+    barrier_wait();
+
+    // Join all of our threads
+    for (auto &thread : threads)
+        thread.join();
+
+    delete[] g_char_ptr;
+
+    return 0;
+}