//
// Copyright 2018 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/internal/stack_consumption.h"

#include "absl/base/config.h"

#ifdef ABSL_INTERNAL_HAVE_DEBUGGING_STACK_CONSUMPTION

#include <string.h>

#include "gtest/gtest.h"
#include "absl/log/log.h"

namespace absl {
ABSL_NAMESPACE_BEGIN
namespace debugging_internal {
namespace {

static void SimpleSignalHandler(int signo) {
  char buf[100];
  memset(buf, 'a', sizeof(buf));

  // Never true, but prevents compiler from optimizing buf out.
  if (signo == 0) {
    LOG(INFO) << static_cast<void*>(buf);
  }
}

TEST(SignalHandlerStackConsumptionTest, MeasuresStackConsumption) {
  // Our handler should consume reasonable number of bytes.
  EXPECT_GE(GetSignalHandlerStackConsumption(SimpleSignalHandler), 100);
}

}  // namespace
}  // namespace debugging_internal
ABSL_NAMESPACE_END
}  // namespace absl

#endif  // ABSL_INTERNAL_HAVE_DEBUGGING_STACK_CONSUMPTION