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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
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