crashpad/util/test/errors.h
Mark Mentovai 9f6d86742d Add TaskMemory, which can read another Mach task’s memory, and its test.
This also adds MachErrorMessage(), a test-only function that’s a
dependency of TaskMemory’s test, and related test-only error message
functions.

TEST=util_test TaskMemory.*
R=rsesek@chromium.org

Review URL: https://codereview.chromium.org/438993002
2014-08-03 18:48:40 -04:00

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// Copyright 2014 The Crashpad Authors. All rights reserved.
//
// 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.
#ifndef CRASHPAD_UTIL_TEST_ERRORS_H_
#define CRASHPAD_UTIL_TEST_ERRORS_H_
#include <string>
namespace crashpad {
namespace test {
// These functions format messages in a similar way to the PLOG and PCHECK
// family of logging macros in base/logging.h. They exist to interoperate with
// gtest assertions, which dont interoperate with logging but can be streamed
// to.
//
// Where non-test code could do:
// PCHECK(rv == 0) << "close";
// gtest-based test code can do:
// EXPECT_EQ(0, rv) << ErrnoMessage("close");
//! \brief Formats an error message using an `errno` value.
//!
//! The returned string will combine the \a base string, if supplied, with a
//! a textual and numeric description of the error.
//!
//! The message is formatted using `strerror()`. \a err may be `0` or outside of
//! the range of known error codes, and the message returned will contain the
//! string that `strerror()` uses in these cases.
//!
//! \param[in] err The error code, usable as an `errno` value.
//! \param[in] base A string to prepend to the error description.
//!
//! \return A string of the format `"Operation not permitted (1)"` if \a err has
//! the value `EPERM` on a system where this is defined to be `1`. If \a
//! base is not empty, it will be prepended to this string, separated by a
//! colon.
std::string ErrnoMessage(int err, const std::string& base = std::string());
//! \brief Formats an error message using `errno`.
//!
//! The returned string will combine the \a base string, if supplied, with a
//! a textual and numeric description of the error.
//!
//! The message is formatted using `strerror()`. `errno` may be `0` or outside
//! of the range of known error codes, and the message returned will contain the
//! string that `strerror()` uses in these cases.
//!
//! \param[in] base A string to prepend to the error description.
//!
//! \return A string of the format `"Operation not permitted (1)"` if `errno`
//! has the value `EPERM` on a system where this is defined to be `1`. If
//! \a base is not empty, it will be prepended to this string, separated by
//! a colon.
std::string ErrnoMessage(const std::string& base = std::string());
} // namespace test
} // namespace crashpad
#endif // CRASHPAD_UTIL_TEST_ERRORS_H_