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2b3aa44656
The previous implementation of the TEST_COMPARE macro would fail
to compile code like this:
int ret = res_send (query, sizeof (query), buf, sizeof (buf));
TEST_COMPARE (ret,
sizeof (query)
+ 2 /* Compression reference. */
+ 2 + 2 + 4 + 2 /* Type, class, TTL, RDATA length. */
+ 1 /* Pascal-style string length. */
+ strlen (expected_name));
This resulted in a failed static assertion, "integer conversions
may alter sign of operands". A user of the TEST_COMPARE would have
to add a cast to fix this.
This patch reverts to the original proposed solution of a run-time
check, making TEST_COMPARE usable for comparisons of numbers with
types with different signedness in more contexts.
154 lines
7.2 KiB
C
154 lines
7.2 KiB
C
/* Functionality for reporting test results.
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Copyright (C) 2016-2018 Free Software Foundation, Inc.
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This file is part of the GNU C Library.
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The GNU C Library is free software; you can redistribute it and/or
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modify it under the terms of the GNU Lesser General Public
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License as published by the Free Software Foundation; either
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version 2.1 of the License, or (at your option) any later version.
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The GNU C Library is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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Lesser General Public License for more details.
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You should have received a copy of the GNU Lesser General Public
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License along with the GNU C Library; if not, see
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<http://www.gnu.org/licenses/>. */
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#ifndef SUPPORT_CHECK_H
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#define SUPPORT_CHECK_H
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#include <sys/cdefs.h>
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__BEGIN_DECLS
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/* Record a test failure, print the failure message to standard output
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and return 1. */
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#define FAIL_RET(...) \
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return support_print_failure_impl (__FILE__, __LINE__, __VA_ARGS__)
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/* Print the failure message and terminate the process with STATUS.
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Record a the process as failed if STATUS is neither EXIT_SUCCESS
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nor EXIT_UNSUPPORTED. */
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#define FAIL_EXIT(status, ...) \
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support_exit_failure_impl (status, __FILE__, __LINE__, __VA_ARGS__)
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/* Record a test failure, print the failure message and terminate with
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exit status 1. */
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#define FAIL_EXIT1(...) \
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support_exit_failure_impl (1, __FILE__, __LINE__, __VA_ARGS__)
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/* Print failure message and terminate with as unsupported test (exit
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status of 77). */
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#define FAIL_UNSUPPORTED(...) \
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support_exit_failure_impl (77, __FILE__, __LINE__, __VA_ARGS__)
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/* Record a test failure (but continue executing) if EXPR evaluates to
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false. */
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#define TEST_VERIFY(expr) \
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({ \
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if (expr) \
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; \
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else \
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support_test_verify_impl (__FILE__, __LINE__, #expr); \
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})
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/* Record a test failure and exit if EXPR evaluates to false. */
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#define TEST_VERIFY_EXIT(expr) \
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({ \
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if (expr) \
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; \
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else \
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support_test_verify_exit_impl \
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(1, __FILE__, __LINE__, #expr); \
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})
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int support_print_failure_impl (const char *file, int line,
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const char *format, ...)
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__attribute__ ((nonnull (1), format (printf, 3, 4)));
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void support_exit_failure_impl (int exit_status,
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const char *file, int line,
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const char *format, ...)
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__attribute__ ((noreturn, nonnull (2), format (printf, 4, 5)));
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void support_test_verify_impl (const char *file, int line,
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const char *expr);
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void support_test_verify_exit_impl (int status, const char *file, int line,
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const char *expr)
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__attribute__ ((noreturn));
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/* Record a test failure. This function returns and does not
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terminate the process. The failure counter is stored in a shared
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memory mapping, so that failures reported in child processes are
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visible to the parent process and test driver. This function
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depends on initialization by an ELF constructor, so it can only be
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invoked after the test driver has run. Note that this function
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does not support reporting failures from a DSO. */
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void support_record_failure (void);
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/* Static assertion, under a common name for both C++ and C11. */
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#ifdef __cplusplus
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# define support_static_assert static_assert
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#else
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# define support_static_assert _Static_assert
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#endif
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/* Compare the two integers LEFT and RIGHT and report failure if they
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are different. */
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#define TEST_COMPARE(left, right) \
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({ \
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/* + applies the integer promotions, for bitfield support. */ \
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typedef __typeof__ (+ (left)) __left_type; \
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typedef __typeof__ (+ (right)) __right_type; \
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__left_type __left_value = (left); \
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__right_type __right_value = (right); \
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int __left_is_positive = __left_value > 0; \
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int __right_is_positive = __right_value > 0; \
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/* Prevent use with floating-point types. */ \
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support_static_assert ((__left_type) 1.0 == (__left_type) 1.5, \
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"left value has floating-point type"); \
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support_static_assert ((__right_type) 1.0 == (__right_type) 1.5, \
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"right value has floating-point type"); \
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/* Prevent accidental use with larger-than-long long types. */ \
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support_static_assert (sizeof (__left_value) <= sizeof (long long), \
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"left value fits into long long"); \
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support_static_assert (sizeof (__right_value) <= sizeof (long long), \
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"right value fits into long long"); \
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/* Compare the value. */ \
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if (__left_value != __right_value \
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|| __left_is_positive != __right_is_positive) \
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/* Pass the sign for printing the correct value. */ \
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support_test_compare_failure \
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(__FILE__, __LINE__, \
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#left, __left_value, __left_is_positive, sizeof (__left_type), \
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#right, __right_value, __right_is_positive, sizeof (__right_type)); \
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})
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/* Internal implementation of TEST_COMPARE. LEFT_POSITIVE and
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RIGHT_POSITIVE are used to store the sign separately, so that both
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unsigned long long and long long arguments fit into LEFT_VALUE and
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RIGHT_VALUE, and the function can still print the original value.
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LEFT_SIZE and RIGHT_SIZE specify the size of the argument in bytes,
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for hexadecimal formatting. */
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void support_test_compare_failure (const char *file, int line,
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const char *left_expr,
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long long left_value,
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int left_positive,
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int left_size,
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const char *right_expr,
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long long right_value,
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int right_positive,
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int right_size);
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/* Internal function called by the test driver. */
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int support_report_failure (int status)
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__attribute__ ((weak, warn_unused_result));
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/* Internal function used to test the failure recording framework. */
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void support_record_failure_reset (void);
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__END_DECLS
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#endif /* SUPPORT_CHECK_H */
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