Merge new upstream LTS 20230125.3

1 files changed, 47 insertions, 0 deletions

diff --git a/absl/debugging/stacktrace_test.cc b/absl/debugging/stacktrace_test.cc
new file mode 100644
index 00000000..78ce7ad0
--- /dev/null
+++ b/absl/debugging/stacktrace_test.cc
@@ -0,0 +1,47 @@
+// Copyright 2023 The Abseil Authors.
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//      https://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+#include "absl/debugging/stacktrace.h"
+
+#include "gtest/gtest.h"
+#include "absl/base/macros.h"
+#include "absl/base/optimization.h"
+
+namespace {
+
+// This test is currently only known to pass on linux/x86_64.
+#if defined(__linux__) && defined(__x86_64__)
+ABSL_ATTRIBUTE_NOINLINE void Unwind(void* p) {
+  ABSL_ATTRIBUTE_UNUSED static void* volatile sink = p;
+  constexpr int kSize = 16;
+  void* stack[kSize];
+  int frames[kSize];
+  absl::GetStackTrace(stack, kSize, 0);
+  absl::GetStackFrames(stack, frames, kSize, 0);
+}
+
+ABSL_ATTRIBUTE_NOINLINE void HugeFrame() {
+  char buffer[1 << 20];
+  Unwind(buffer);
+  ABSL_BLOCK_TAIL_CALL_OPTIMIZATION();
+}
+
+TEST(StackTrace, HugeFrame) {
+  // Ensure that the unwinder is not confused by very large stack frames.
+  HugeFrame();
+  ABSL_BLOCK_TAIL_CALL_OPTIMIZATION();
+}
+#endif
+
+}  // namespace