From 78b9749c0a4ea980a8b934645da6ae98fcc665e8 Mon Sep 17 00:00:00 2001
From: dim <dim@FreeBSD.org>
Date: Wed, 6 Jan 2016 20:12:03 +0000
Subject: Vendor import of lldb trunk r256945:
 https://llvm.org/svn/llvm-project/lldb/trunk@256945

---
 .../test/functionalities/attach_resume/main.cpp    | 50 ++++++++++++++++++++++
 1 file changed, 50 insertions(+)
 create mode 100644 packages/Python/lldbsuite/test/functionalities/attach_resume/main.cpp

(limited to 'packages/Python/lldbsuite/test/functionalities/attach_resume/main.cpp')

diff --git a/packages/Python/lldbsuite/test/functionalities/attach_resume/main.cpp b/packages/Python/lldbsuite/test/functionalities/attach_resume/main.cpp
new file mode 100644
index 0000000..7cf3602
--- /dev/null
+++ b/packages/Python/lldbsuite/test/functionalities/attach_resume/main.cpp
@@ -0,0 +1,50 @@
+#include <stdio.h>
+#include <fcntl.h>
+
+#include <chrono>
+#include <thread>
+
+#if defined(__linux__)
+#include <sys/prctl.h>
+#endif
+
+volatile bool debugger_flag = true; // The debugger will flip this to false
+
+void *start(void *data)
+{
+    int i;
+    size_t idx = (size_t)data;
+    for (i=0; i<30; i++)
+    {
+        if ( idx == 0 && debugger_flag)
+            std::this_thread::sleep_for(std::chrono::microseconds(1)); // Set breakpoint here
+        std::this_thread::sleep_for(std::chrono::seconds(1));
+    }
+    return 0;
+}
+
+int main(int argc, char const *argv[])
+{
+#if defined(__linux__)
+    // Immediately enable any ptracer so that we can allow the stub attach
+    // operation to succeed.  Some Linux kernels are locked down so that
+    // only an ancestor process can be a ptracer of a process.  This disables that
+    // restriction.  Without it, attach-related stub tests will fail.
+#if defined(PR_SET_PTRACER) && defined(PR_SET_PTRACER_ANY)
+    // For now we execute on best effort basis.  If this fails for
+    // some reason, so be it.
+    const int prctl_result = prctl(PR_SET_PTRACER, PR_SET_PTRACER_ANY, 0, 0, 0);
+    static_cast<void> (prctl_result);
+#endif
+#endif
+
+    static const size_t nthreads = 16;
+    std::thread threads[nthreads];
+    size_t i;
+
+    for (i=0; i<nthreads; i++)
+        threads[i] = std::move(std::thread(start, (void*)i));
+
+    for (i=0; i<nthreads; i++)
+        threads[i].join();
+}
-- 
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