Vendor import of lldb trunk r256945:

https://llvm.org/svn/llvm-project/lldb/trunk@256945

1 files changed, 37 insertions, 0 deletions

diff --git a/packages/Python/lldbsuite/test/functionalities/process_attach/main.cpp b/packages/Python/lldbsuite/test/functionalities/process_attach/main.cpp
new file mode 100644
index 0000000..8021fea
--- /dev/null
+++ b/packages/Python/lldbsuite/test/functionalities/process_attach/main.cpp
@@ -0,0 +1,37 @@
+#include <stdio.h>
+
+#if defined(__linux__)
+#include <sys/prctl.h>
+#endif
+
+#include <chrono>
+#include <thread>
+
+int main(int argc, char const *argv[]) {
+    int temp;
+#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)
+    int prctl_result;
+
+    // For now we execute on best effort basis.  If this fails for
+    // some reason, so be it.
+    prctl_result = prctl(PR_SET_PTRACER, PR_SET_PTRACER_ANY, 0, 0, 0);
+    (void) prctl_result;
+#endif
+#endif
+
+    // Waiting to be attached by the debugger.
+    temp = 0;
+
+    while (temp < 30) // Waiting to be attached...
+    {
+        std::this_thread::sleep_for(std::chrono::seconds(2));
+        temp++;
+    }
+
+    printf("Exiting now\n");
+}