Changes imported from Abseil "staging" branch:

- b00fb48c537d494ab775bc6701acfb8e100d8b88 Add a test utility for measuring stack consumption. by Derek Mauro <dmauro@google.com>

GitOrigin-RevId: b00fb48c537d494ab775bc6701acfb8e100d8b88
Change-Id: I00466a6d6c14911c12d34f62a4144925748e3f61

absl/debugging/internal/stack_consumption_test.cc

@@ -0,0 +1,48 @@
+//
+// 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
+//
+//      http://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"
+
+#ifdef ABSL_INTERNAL_HAVE_DEBUGGING_STACK_CONSUMPTION
+
+#include <string.h>
+
+#include "gtest/gtest.h"
+#include "absl/base/internal/raw_logging.h"
+
+namespace absl {
+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) {
+    ABSL_RAW_LOG(INFO, "%p", static_cast<void*>(buf));
+  }
+}
+
+TEST(SignalHandlerStackConsumptionTest, MeasuresStackConsumption) {
+  // Our handler should consume reasonable number of bytes.
+  EXPECT_GE(GetSignalHandlerStackConsumption(SimpleSignalHandler), 100);
+}
+
+}  // namespace
+}  // namespace debugging_internal
+}  // namespace absl
+
+#endif  // ABSL_INTERNAL_HAVE_DEBUGGING_STACK_CONSUMPTION