1 files changed, 70 insertions, 0 deletions
diff --git a/contrib/llvm-project/compiler-rt/lib/memprof/memprof_descriptions.cpp b/contrib/llvm-project/compiler-rt/lib/memprof/memprof_descriptions.cpp
new file mode 100644
index 000000000000..4fbe2943e653
--- /dev/null
+++ b/contrib/llvm-project/compiler-rt/lib/memprof/memprof_descriptions.cpp
@@ -0,0 +1,70 @@
+//===-- memprof_descriptions.cpp -------------------------------*- C++ -*-===//
+//
+// 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
+//
+//===----------------------------------------------------------------------===//
+//
+// This file is a part of MemProfiler, a memory profiler.
+//
+// MemProf functions for getting information about an address and/or printing
+// it.
+//===----------------------------------------------------------------------===//
+
+#include "memprof_descriptions.h"
+#include "memprof_mapping.h"
+#include "memprof_stack.h"
+#include "sanitizer_common/sanitizer_stackdepot.h"
+
+namespace __memprof {
+
+MemprofThreadIdAndName::MemprofThreadIdAndName(MemprofThreadContext *t) {
+  Init(t->tid, t->name);
+}
+
+MemprofThreadIdAndName::MemprofThreadIdAndName(u32 tid) {
+  if (tid == kInvalidTid) {
+    Init(tid, "");
+  } else {
+    memprofThreadRegistry().CheckLocked();
+    MemprofThreadContext *t = GetThreadContextByTidLocked(tid);
+    Init(tid, t->name);
+  }
+}
+
+void MemprofThreadIdAndName::Init(u32 tid, const char *tname) {
+  int len = internal_snprintf(name, sizeof(name), "T%d", tid);
+  CHECK(((unsigned int)len) < sizeof(name));
+  if (tname[0] != '\0')
+    internal_snprintf(&name[len], sizeof(name) - len, " (%s)", tname);
+}
+
+void DescribeThread(MemprofThreadContext *context) {
+  CHECK(context);
+  memprofThreadRegistry().CheckLocked();
+  // No need to announce the main thread.
+  if (context->tid == kMainTid || context->announced) {
+    return;
+  }
+  context->announced = true;
+  InternalScopedString str;
+  str.AppendF("Thread %s", MemprofThreadIdAndName(context).c_str());
+  if (context->parent_tid == kInvalidTid) {
+    str.Append(" created by unknown thread\n");
+    Printf("%s", str.data());
+    return;
+  }
+  str.AppendF(" created by %s here:\n",
+              MemprofThreadIdAndName(context->parent_tid).c_str());
+  Printf("%s", str.data());
+  StackDepotGet(context->stack_id).Print();
+  // Recursively described parent thread if needed.
+  if (flags()->print_full_thread_history) {
+    MemprofThreadContext *parent_context =
+        GetThreadContextByTidLocked(context->parent_tid);
+    DescribeThread(parent_context);
+  }
+}
+
+} // namespace __memprof