SafeAssert: async-signal-safe CHECK, DCHECK

[folly.git] / folly / SafeAssert.cpp

diff --git a/folly/SafeAssert.cpp b/folly/SafeAssert.cpp
new file mode 100644 (file)
index 0000000..e9faca7
--- /dev/null
+++ b/folly/SafeAssert.cpp
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+/*
+ * Copyright 2013 Facebook, Inc.
+ *
+ * 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 "folly/SafeAssert.h"
+
+#include "folly/Conv.h"
+#include "folly/FileUtil.h"
+
+namespace folly { namespace detail {
+
+namespace {
+void writeStderr(const char* s) {
+  writeFull(STDERR_FILENO, s, strlen(s));
+}
+}  // namespace
+
+void assertionFailure(const char* expr, const char* msg, const char* file,
+                      unsigned int line, const char* function) {
+  writeStderr("\n\nAssertion failure: ");
+  writeStderr(expr);
+  writeStderr("\nMessage: ");
+  writeStderr(msg);
+  writeStderr("\nFile: ");
+  writeStderr(file);
+  writeStderr("\nLine: ");
+  char buf[20];
+  uint32_t n = uint64ToBufferUnsafe(line, buf);
+  writeFull(STDERR_FILENO, buf, n);
+  writeStderr("\nFunction: ");
+  writeStderr(function);
+  writeStderr("\n");
+  fsyncNoInt(STDERR_FILENO);
+  abort();
+}
+
+}}  // namespaces
+