1 files changed, 44 insertions, 0 deletions
diff --git a/contrib/llvm-project/lldb/source/Utility/Instrumentation.cpp b/contrib/llvm-project/lldb/source/Utility/Instrumentation.cpp
new file mode 100644
index 000000000000..581f657aea80
--- /dev/null
+++ b/contrib/llvm-project/lldb/source/Utility/Instrumentation.cpp
@@ -0,0 +1,44 @@
+//===-- Instrumentation.cpp -----------------------------------------------===//
+// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
+// See https://llvm.org/LICENSE.txt for license information.
+// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
+//
+//===----------------------------------------------------------------------===//
+
+#include "lldb/Utility/Instrumentation.h"
+#include "lldb/Utility/LLDBLog.h"
+#include "llvm/Support/Signposts.h"
+
+#include <cstdio>
+#include <cstdlib>
+#include <limits>
+#include <thread>
+
+using namespace lldb_private;
+using namespace lldb_private::instrumentation;
+
+// Whether we're currently across the API boundary.
+static thread_local bool g_global_boundary = false;
+
+// Instrument SB API calls with singposts when supported.
+static llvm::ManagedStatic<llvm::SignpostEmitter> g_api_signposts;
+
+Instrumenter::Instrumenter(llvm::StringRef pretty_func,
+                           std::string &&pretty_args)
+    : m_pretty_func(pretty_func) {
+  if (!g_global_boundary) {
+    g_global_boundary = true;
+    m_local_boundary = true;
+    g_api_signposts->startInterval(this, m_pretty_func);
+  }
+  LLDB_LOG(GetLog(LLDBLog::API), "[{0}] {1} ({2})",
+           m_local_boundary ? "external" : "internal", m_pretty_func,
+           pretty_args);
+}
+
+Instrumenter::~Instrumenter() {
+  if (m_local_boundary) {
+    g_global_boundary = false;
+    g_api_signposts->endInterval(this, m_pretty_func);
+  }
+}