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// Copyright 2016 The SwiftShader 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.
// debug.h: Debugging utilities.
#ifndef Debug_hpp
#define Debug_hpp
#include <assert.h>
#include <stdio.h>
#include <stdlib.h>
#include <cctype>
#include <string>
#if !defined(TRACE_OUTPUT_FILE)
# define TRACE_OUTPUT_FILE "debug.txt"
#endif
#if defined(__GNUC__) || defined(__clang__)
# define CHECK_PRINTF_ARGS __attribute__((format(printf, 1, 2)))
#else
# define CHECK_PRINTF_ARGS
#endif
namespace sw {
// Outputs text to the debugging log
void trace(const char *format, ...) CHECK_PRINTF_ARGS;
inline void trace() {}
// Outputs text to the debugging log and prints to stderr.
void warn(const char *format, ...) CHECK_PRINTF_ARGS;
inline void warn() {}
// Outputs the message to the debugging log and stderr, and calls abort().
void abort(const char *format, ...) CHECK_PRINTF_ARGS;
// Outputs text to the debugging log, and traps once if a debugger is attached.
void log_trap(const char *format, ...) CHECK_PRINTF_ARGS;
} // namespace sw
// A macro to output a trace of a function call and its arguments to the
// debugging log. Disabled if SWIFTSHADER_DISABLE_TRACE is defined.
#if defined(SWIFTSHADER_DISABLE_TRACE)
# define TRACE(message, ...) (void(0))
#else
# define TRACE(message, ...) sw::trace("%s:%d TRACE: " message "\n", __FILE__, __LINE__, ##__VA_ARGS__)
#endif
#if defined(SWIFTSHADER_DISABLE_TRACE) || defined(NDEBUG)
# define LOG_TRAP(message, ...) (void(0))
#else
# define LOG_TRAP(message, ...) sw::log_trap("%s:%d %s LOG TRAP: " message "\n", __FILE__, __LINE__, __func__, ##__VA_ARGS__)
#endif
// A macro to print a warning message to the debugging log and stderr to denote
// an issue that needs fixing.
#define FIXME(message, ...) sw::warn("%s:%d FIXME: " message "\n", __FILE__, __LINE__, ##__VA_ARGS__)
// A macro to print a warning message to the debugging log and stderr.
#define WARN(message, ...) sw::warn("%s:%d WARNING: " message "\n", __FILE__, __LINE__, ##__VA_ARGS__)
// A macro that delegates to:
// abort() in debug builds (!NDEBUG || DCHECK_ALWAYS_ON)
// or
// warn() in release builds (NDEBUG && !DCHECK_ALWAYS_ON)
#undef DABORT
#if !defined(NDEBUG) || defined(DCHECK_ALWAYS_ON)
# define DABORT(message, ...) sw::abort("%s:%d ABORT: " message "\n", __FILE__, __LINE__, ##__VA_ARGS__)
#else
# define DABORT(message, ...) sw::warn("%s:%d WARNING: " message "\n", __FILE__, __LINE__, ##__VA_ARGS__);
#endif
// A macro asserting a condition.
// If the condition fails, the condition and message is passed to DABORT().
#undef ASSERT_MSG
#if !defined(NDEBUG) || defined(DCHECK_ALWAYS_ON)
# define ASSERT_MSG(expression, format, ...) \
do \
{ \
if(!(expression)) \
{ \
DABORT("ASSERT(%s): " format "\n", #expression, ##__VA_ARGS__); \
} \
} while(0)
#else
// Silence unused variable warnings without evaluating the expressions.
// TODO(b/154914395): Also ignore variadic arguments (similar to RR_WATCH expansion)
# define ASSERT_MSG(expression, format, ...) \
do \
{ \
(void)sizeof((int)(bool)(expression)); \
(void)sizeof(format); \
} while(0)
#endif
// A macro asserting a condition.
// If the condition fails, the condition is passed to DABORT().
#undef ASSERT
#if !defined(NDEBUG) || defined(DCHECK_ALWAYS_ON)
# define ASSERT(expression) \
do \
{ \
if(!(expression)) \
{ \
DABORT("ASSERT(%s)\n", #expression); \
} \
} while(0)
#else
// Silence unused variable warnings without evaluating the expressions.
# define ASSERT(expression) \
do \
{ \
(void)sizeof((int)(bool)(expression)); \
} while(0)
#endif
// A macro to indicate functionality currently unimplemented, for a feature advertised
// as supported. Since this is a bug, a bug ID must be provided, in b/### format.
// For unimplemented functionality not advertised as supported, use UNSUPPORTED() instead.
#undef UNIMPLEMENTED
#define UNIMPLEMENTED(format, ...) \
DABORT("UNIMPLEMENTED: " format, ##__VA_ARGS__); \
static_assert(format[0] == 'b' && format[1] == '/' && format[2] >= '0' && format[2] <= '9', "explanation must start with bug reference in b/### format")
// A macro to indicate unsupported functionality.
// This should be called when a Vulkan / SPIR-V feature is attempted to be used,
// but is not currently implemented by SwiftShader.
// Note that in a well-behaved application these should not be reached as the
// application should be respecting the advertised features / limits.
#undef UNSUPPORTED
#define UNSUPPORTED(format, ...) DABORT("UNSUPPORTED: " format, ##__VA_ARGS__)
// A macro for code which should never be reached, even with misbehaving
// applications.
#undef UNREACHABLE
#define UNREACHABLE(format, ...) DABORT("UNREACHABLE: " format, ##__VA_ARGS__)
// A macro asserting a condition and returning if false.
// Note this macro always evaluates the expression and also returns in Release builds.
#undef ASSERT_OR_RETURN
#if !defined(NDEBUG) || defined(DCHECK_ALWAYS_ON)
# define ASSERT_OR_RETURN(expression) ASSERT(expression)
#else
# define ASSERT_OR_RETURN(expression) \
do \
{ \
if(!(expression)) \
{ \
return; \
} \
} while(0)
#endif
#endif // Debug_hpp