stacktrace_test.cc

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// 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/aarch64.

#if defined(__linux__) && (defined(__x86_64__) || defined(__aarch64__))

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