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//===-- Definition of a libc internal assert macro --------------*- C++ -*-===//
//
// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
// See https://llvm.org/LICENSE.txt for license information.
// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
//
//===----------------------------------------------------------------------===//
#ifndef LLVM_LIBC_SRC_SUPPORT_LIBC_ASSERT_H
#define LLVM_LIBC_SRC_SUPPORT_LIBC_ASSERT_H
#include "src/__support/OSUtil/io.h"
#include "src/__support/OSUtil/quick_exit.h"
#include "src/__support/integer_to_string.h"
#include "src/__support/macros/attributes.h" // For LIBC_INLINE
namespace __llvm_libc {
LIBC_INLINE void report_assertion_failure(const char *assertion,
const char *filename, unsigned line,
const char *funcname) {
char line_str[IntegerToString::dec_bufsize<unsigned>()];
IntegerToString::dec(line, line_str);
__llvm_libc::write_to_stderr(filename);
__llvm_libc::write_to_stderr(":");
__llvm_libc::write_to_stderr(line_str);
__llvm_libc::write_to_stderr(": Assertion failed: '");
__llvm_libc::write_to_stderr(assertion);
__llvm_libc::write_to_stderr("' in function: '");
__llvm_libc::write_to_stderr(funcname);
__llvm_libc::write_to_stderr("'\n");
}
} // namespace __llvm_libc
#ifdef LIBC_ASSERT
#error "Unexpected: LIBC_ASSERT macro already defined"
#endif
// The public "assert" macro calls abort on failure. Should it be same here?
// The libc intenral assert can fire from anywhere inside the libc. So, to
// avoid potential chicken-and-egg problems, it is simple to do a quick_exit
// on assertion failure instead of calling abort. We also don't want to use
// __builtin_trap as it could potentially be implemented using illegal
// instructions which can be very misleading when debugging.
#ifdef NDEBUG
#define LIBC_ASSERT(COND) \
do { \
} while (false)
#else
#define LIBC_ASSERT(COND) \
do { \
if (!(COND)) { \
__llvm_libc::report_assertion_failure(#COND, __FILE__, __LINE__, \
__PRETTY_FUNCTION__); \
__llvm_libc::quick_exit(0xFF); \
} \
} while (false)
#endif // NDEBUG
#endif // LLVM_LIBC_SRC_SUPPORT_LIBC_ASSERT_H
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