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-rw-r--r--test/util/logging.cc97
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diff --git a/test/util/logging.cc b/test/util/logging.cc
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+// Copyright 2018 The gVisor 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 "test/util/logging.h"
+
+#include <errno.h>
+#include <stdint.h>
+#include <stdlib.h>
+#include <unistd.h>
+
+namespace gvisor {
+namespace testing {
+
+namespace {
+
+// We implement this here instead of using test_util to avoid cyclic
+// dependencies.
+int Write(int fd, const char* buf, size_t size) {
+ size_t written = 0;
+ while (written < size) {
+ int res = write(fd, buf + written, size - written);
+ if (res < 0 && errno == EINTR) {
+ continue;
+ } else if (res <= 0) {
+ break;
+ }
+
+ written += res;
+ }
+ return static_cast<int>(written);
+}
+
+// Write 32-bit decimal number to fd.
+int WriteNumber(int fd, uint32_t val) {
+ constexpr char kDigits[] = "0123456789";
+ constexpr int kBase = 10;
+
+ // 10 chars for 32-bit number in decimal, 1 char for the NUL-terminator.
+ constexpr int kBufferSize = 11;
+ char buf[kBufferSize];
+
+ // Convert the number to string.
+ char* s = buf + sizeof(buf) - 1;
+ size_t size = 0;
+
+ *s = '\0';
+ do {
+ s--;
+ size++;
+
+ *s = kDigits[val % kBase];
+ val /= kBase;
+ } while (val);
+
+ return Write(fd, s, size);
+}
+
+} // namespace
+
+void CheckFailure(const char* cond, size_t cond_size, const char* msg,
+ size_t msg_size, bool include_errno) {
+ int saved_errno = errno;
+
+ constexpr char kCheckFailure[] = "Check failed: ";
+ Write(2, kCheckFailure, sizeof(kCheckFailure) - 1);
+ Write(2, cond, cond_size);
+
+ if (msg != nullptr) {
+ Write(2, ": ", 2);
+ Write(2, msg, msg_size);
+ }
+
+ if (include_errno) {
+ constexpr char kErrnoMessage[] = " (errno ";
+ Write(2, kErrnoMessage, sizeof(kErrnoMessage) - 1);
+ WriteNumber(2, saved_errno);
+ Write(2, ")", 1);
+ }
+
+ Write(2, "\n", 1);
+
+ abort();
+}
+
+} // namespace testing
+} // namespace gvisor